Universal door closer and assembly thereof

Abstract

The utility model discloses a universal door closer which comprises a shell, a cylinder hole is formed in the shell, a piston is arranged in the cylinder hole in a clearance fit mode, a compression spring is arranged on the piston, a radial penetrating hole is formed in the piston, parallel teeth are arranged on the side face of the radial penetrating hole, a shaft rod is arranged on the shell, a gear is arranged on the shaft rod, and a longitudinal through hole is formed in the shaft rod. The middle of the longitudinal through hole is provided with inner teeth, the longitudinal through hole is provided with a connecting shaft with outer teeth, the connecting shaft is provided with a threaded hole, a rocker arm is arranged above the connecting shaft, the rocker arm is provided with an inner tooth hole, one end of the rocker arm and the connecting shaft are fixed together through a first fastener, and a limiting sleeve is arranged in the longitudinal through hole. Comprising a plurality of universal door closers which are installed together side by side. The rocker arm does not move in the axial direction, the left position and the right position of the door closer can be installed, the angle and the force of the door closer can be adjusted, a plurality of universal door closers can be connected in series for use, and therefore the universal door closer is suitable for application occasions where heavy doors and wide doors need to be opened and closed with large force, and is worthy of application and popularization.

Description

Technical Field

[0001] The utility model relates to the field of hardware, in particular to a door closer, particularly a type door closer and a combination thereof. Background Art

[0002] A door closer is a device installed on the door head that can automatically close the door. The main functions of a door closer include: 1). Control the closing speed of the door: It can be adjusted as needed to ensure that the door closes smoothly and reduces noise and impact. 2). Keep the door closed: In some occasions such as fire doors, it plays an important safety role. 3). Convenient passage: After people pass through, the door will automatically close slowly without manual closing. There are many types of door closers with different specifications and performances to adapt to various types and sizes of doors, as well as different usage environments and requirements. When choosing a door closer, you need to consider factors such as the weight, size, frequency of use, and installation location of the door.

[0003] Traditional door closers have requirements for their installation position, such as whether the door opens to the left or right, the installation angle of the rocker arm, and the force required to open the door. These issues all require door closers with special parameters to be selected and used, which will result in poor versatility.

[0004] Chinese utility model patent CN 210858366 U discloses a door closer with a buffering effect, which includes a buffer door closer body, a base installed on one side of the top surface of the buffer door closer body, a groove on the top surface of the base, an oil filling hole on the bottom surface of the groove, and the bottom end of the oil filling hole is connected to the inner cavity of the buffer door closer body, a top cover is rotatably connected to the top surface of the base, a fixed seat is fixedly connected to the inner cavity of the oil filling hole, a support frame is detachably connected to the surface of the fixed seat, and a metal mesh is installed on the surface of the support frame. This door closer is a door closer for exclusive application scenarios, and it cannot achieve universal adaptation for whether the door closer is installed on the left or right side, the installation angle of the rocker arm, and the force when the door is opened. Utility Model Content

[0005] The utility model aims to solve the above-mentioned shortcomings of the prior art and provide a universal door closer and its combination body, the rocker arm of which can be used for a long time without loosening, the door closer can be installed on the left or right, and the angle and force can be adjusted, thereby meeting the requirements that the door closer can adapt to different installation occasions and has strong versatility.

[0006] The utility model adopts a technical solution to solve its technical problems: this universal door closer comprises a shell, a cylinder hole is arranged in the shell, a piston is fitted in the gap in the cylinder hole, a compression spring is installed between the side end of the piston and the end face of the cylinder hole, a radial through hole is opened on the piston, a group of parallel teeth evenly spaced are arranged on one side end face of the radial through hole, a shaft rod is rotatably connected to the shell, a gear matching with the parallel teeth is fixed on the shaft rod, a longitudinal through hole penetrating the upper and lower end faces of the shaft rod is opened on the shaft rod, inner teeth are arranged in the middle of the longitudinal through hole, a connecting shaft with outer teeth is installed on the longitudinal through hole, threaded holes are opened at the top and bottom ends of the connecting shaft, a rocker arm is arranged above the connecting shaft, one end of the rocker arm is arranged with an inner tooth hole meshing with the connecting shaft, and one end of the rocker arm is fastened together with the connecting shaft by a first fastener. The functions of the inner teeth, connecting shaft, threaded hole, rocker arm, inner tooth hole and the first fastener are that the door can be installed regardless of whether it opens to the left or the right, and it is more versatile. In addition, the connecting shaft is provided with outer teeth, which cooperate with the inner teeth to facilitate the adjustment of the rotation angle of the connecting shaft, so as to correspond to the inner tooth hole on the rocker arm, thereby facilitating the adjustment and installation of the rocker arm. When the rocker arm is installed, the angle is adjustable, which is more convenient to install. The installation of the outer teeth and inner teeth on the connecting shaft has a greater bite force and will not slip. When the door is pushed open or closed, the door closer responds faster and without empty space. The angle between the rocker arm and the door closer is continuously adjusted, and the force of the rocker arm acting on the door closer can also be adjusted, so that the force can be adjusted when the door is pushed open or closed.

[0007] Further improvement, a limit sleeve is arranged in the longitudinal through hole, a longitudinal through hole is opened on the limit sleeve, a telescopic opening is opened on the limit sleeve and horizontally penetrates the longitudinal through hole, the upper and lower ends of the longitudinal through hole are provided with a conical surface, and a second fastener for propping up the limit sleeve and clamping the limit sleeve on the inner wall of the longitudinal through hole is installed between the limit sleeve and the connecting shaft. The role of the limit sleeve, the longitudinal through hole, and the telescopic opening is to limit the axial movement of the connecting shaft, thereby avoiding the axial jumping of the rocker arm when in use, avoiding the virtual position when opening and closing the door, and also increasing the service life of the door closer; the role of the conical surface is provided at the upper and lower ends of the longitudinal through hole, so that it can be used regardless of whether the door is opened on the left or right, and it is more versatile.

[0008] Further improvement, the rocker arm includes a rocker arm and a push rod hinged with the rocker arm; the push rod includes a sleeve, a transverse plug hole is opened on the sleeve, a longitudinal channel hole is opened on the sleeve to penetrate the transverse plug hole, a connecting rod is inserted at the transverse plug hole, the outer end of the connecting rod is hinged with a connecting block that rotates longitudinally, the connecting block is hinged with a mounting seat that rotates transversely, and the connecting rod is threadedly connected with a third fastener that locks the movement of the connecting rod. Here, the rocker arm adopts the form of an adjustable push rod length, which can adjust the position and angle relationship between the door and the door closer, and is convenient to adjust the installation position, adapt to the position relationship and angle relationship between the door closer and the door under different conditions, and has stronger versatility; here, the third fastener can be a flower-toothed anti-slip and anti-loosening locking bolt.

[0009] This combination of universal door closers includes multiple universal door closers installed side by side, the connecting shaft is engaged at each inner tooth, and the limit sleeve is fastened to the bottom end of the connecting shaft through the second fastener and is stretched and clamped on the inner wall of the longitudinal through hole at the end. Multiple universal door closers can be installed in series, and then the connecting shaft is engaged at each inner tooth, and the connecting shaft is limited in the axial direction by the limit sleeve, so as to meet the use environment where the door is heavier and a more powerful door closer is required. It has stronger versatility. According to the needs of the environment, two universal door closers, three universal door closers, four universal door closers, etc. can be connected in series to correspond to doors of different weights (such as Figure 8 as shown).

[0010] The beneficial effects of the utility model are:

[0011] 1). By tightening the baffle, the rocker arm can be ensured not to loosen during long-term use, thus ensuring the stability of the door closer during long-term use;

[0012] 2) The coordination of the connecting shaft and the inner teeth ensures that the door can be installed regardless of whether it opens to the left or the right, which is highly versatile.

[0013] 3). The inner teeth and the outer teeth on the connecting shaft can adjust the angle of the rocker arm, which is convenient for the installation of the rocker arm angle, so that it can adapt to different doors and adjust different door return forces. The force is adjustable;

[0014] 4). In an environment where the strength of a single door closer cannot meet the requirements for the use of extra-heavy and extra-wide doors, multiple universal door closers can be used in series to meet the requirements for extra-heavy and extra-wide doors. This is not only more powerful, but also does not require customized extra-large door closers. It is not only more versatile, but also can save usage costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 for Figure 1 AA section view;

[0017] Figure 3 for Figure 1 BB cross-section diagram;

[0018] Figure 4 The explosion of the utility model Figure 1 ;

[0019] Figure 5 The explosion when the shell is removed Figure 2 ;

[0020] Figure 6 The explosion when the shell is removed Figure 3 ;

[0021] Figure 7 It is a three-dimensional diagram of the central axis rod of the utility model;

[0022] Figure 8 This is a three-dimensional state diagram of the utility model when used in series;

[0023] Fig. 9 This is a structural diagram of the utility model when used in series.

[0024] Explanation of the reference numerals: housing 1, cylinder hole 1-1, piston 2, radial through hole 2-1, parallel teeth 2-2, compression spring 3, shaft 4, gear 4-1, longitudinal through hole 4-2, internal teeth 4-2a, connecting shaft 5, threaded hole 5-1, rocker arm 6, internal tooth hole 6a, rocker rod 6-1, push rod 6-2, sleeve 6-2a, transverse jack 6a-2a, longitudinal channel hole 6b-2a, connecting rod 6-2b, connecting block 6-2c, mounting seat 6-2d, third fastener 6-2e, first fastener 7, limit sleeve 8, longitudinal through hole 8-1, telescopic opening 8-2, conical surface 8-3, second fastener 9. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings:

[0026] Referring to the accompanying drawings: this universal door closer comprises a housing 1, a cylinder hole 1-1 is arranged in the housing 1, a piston 2 is fitted in the clearance in the cylinder hole 1-1, a compression spring 3 is installed between the side end of the piston 2 and the end face of the cylinder hole 1-1, a radial through hole 2-1 is opened on the piston 2, and a group of parallel teeth 2-2 evenly spaced are arranged on one side end face of the radial through hole 2-1, a shaft rod 4 is rotatably connected to the housing 1, a gear 4-1 matching with the parallel teeth 2-2 is fixed on the shaft rod 4, a longitudinal through hole 4-2 penetrating the upper and lower end faces of the shaft rod 4 is opened on the shaft rod 4, an inner tooth 4-2a is arranged in the middle of the longitudinal through hole 4-2, a connecting shaft 5 with external teeth is installed on the longitudinal through hole 4-2, threaded holes 5-1 are opened at the top and bottom ends of the connecting shaft 5, a rocker arm 6 is arranged above the connecting shaft 5, one end of the rocker arm 6 is provided with an inner tooth hole 6a meshing with the connecting shaft 5, and one end of the rocker arm 6 is fastened to the connecting shaft 5 by a first fastener 7.

[0027] A limiting sleeve 8 is arranged in the longitudinal through hole 4-2, and a longitudinal through hole 8-1 is opened on the limiting sleeve 8. A telescopic opening 8-2 which transversely passes through the longitudinal through hole 8-1 is opened on the limiting sleeve 8. Conical surfaces 8-3 are arranged at the upper and lower ends of the longitudinal through hole 8-1. A second fastener 9 for propping up the limiting sleeve 8 and clamping the limiting sleeve 8 on the inner wall of the longitudinal through hole 4-2 is installed between the limiting sleeve 8 and the connecting shaft 5.

[0028] The rocker arm 6 includes a rocker arm 6-1 and a push rod 6-2 hinged to the rocker arm 6-1; the push rod 6-2 includes a sleeve 6-2a, a transverse insertion hole 6a-2a is formed on the sleeve 6-2a, a longitudinal passage hole 6b-2a penetrating the transverse insertion hole 6a-2a is formed on the sleeve 6-2a, a connecting rod 6-2b is inserted into the transverse insertion hole 6a-2a, the outer end of the connecting rod 6-2b is hinged with a connecting block 6-2c that rotates longitudinally, a mounting seat 6-2d that rotates laterally is hinged on the connecting block 6-2c, and a third fastener 6-2e that is threadedly connected to the connecting rod 6-2b for locking the connecting rod 6-2b to move.

[0029] This universal door closer assembly includes multiple universal door closers installed side by side, the connecting shaft 5 is matched with each internal tooth 4-2a, and the limiting sleeve 8 is fastened to the bottom end of the connecting shaft 5 through the second fastener 9 and is stretched and clamped on the inner wall of the longitudinal through hole 4-2 at the end.

[0030] The working principle of the utility model is as follows: during installation, according to whether the door is opened to the left or to the right, adjust the position of the door closer (either laying it flat or flipping it 180° flat), then insert the connecting shaft 5 into the inner tooth hole 6a and fasten it through the first fastener 7, then insert the connecting shaft 5 into the inner tooth 4-2a of the longitudinal through hole 4-2, then, the limiting sleeve 8 is opened by the extrusion of the second fastener 9, so that the limiting sleeve 8 is not only fastened to the bottom end of the connecting shaft 5 but also clamped to the inner wall of the longitudinal through hole 4-2, so that the rocker arm 6 does not move axially or shake, and has strong versatility. Not only can it be used for left-opening or right-opening doors, but the angle of the rocker arm 6 is adjustable, so that the force of opening and closing the door can be adjusted, and it is worthy of popularization and application.

[0031] When the door is particularly heavy and wide, and the strength of a single door closer cannot meet the requirements, multiple door closers can be connected in series. Then, the connecting shaft 5 with external teeth is lengthened and matched with the internal teeth 4-2a of each shaft rod 4. Finally, the limiting sleeve 8 is fastened to the bottom end of the connecting shaft 5 through the second fastener 9 and is stretched and clamped on the inner wall of the longitudinal through hole 4-2 at the end. In this way, the strength can be increased by the door closers in series, so as to meet the requirements of extra-heavy and extra-wide doors without making a larger door closer. The door closer of this scheme is not only more versatile, but also has a lower cost of use (such as Figure 8 as shown).

[0032] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A universal door closer, comprising a housing (1), a cylinder hole (1-1) being provided in the housing (1), a piston (2) being fitted in a clearance in the cylinder hole (1-1), a compression spring (3) being installed between a side end of the piston (2) and an end surface of the cylinder hole (1-1), a radial through hole (2-1) being provided on the piston (2), a group of parallel teeth (2-2) being evenly spaced on one side end surface of the radial through hole (2-1), a shaft (4) being rotatably connected to the housing (1), a gear (4-1) being fixed on the shaft (4) and fitting with the parallel teeth (2-2), wherein: The shaft (4) is provided with a longitudinal through hole (4-2) penetrating the upper and lower end surfaces of the shaft (4); the middle portion of the longitudinal through hole (4-2) is provided with internal teeth (4-2a); a connecting shaft (5) is mounted on the longitudinal through hole (4-2); the connecting shaft (5) is meshed with the internal teeth (4-2a); the top and bottom ends of the connecting shaft (5) are provided with threaded holes (5-1); a rocker arm (6) is provided above the connecting shaft (5); one end of the rocker arm (6) is provided with an internal tooth hole (6a) meshed with the connecting shaft (5); one end of the rocker arm (6) is fastened to the connecting shaft (5) via a first fastener (7).

2. A universal door closer according to claim 1, characterized in that: A limiting sleeve (8) is arranged in the longitudinal through hole (4-2), the limiting sleeve (8) is provided with a longitudinal through hole (8-1), the limiting sleeve (8) is provided with a telescopic opening (8-2) which transversely penetrates the longitudinal through hole (8-1), the upper and lower ends of the longitudinal through hole (8-1) are provided with conical surfaces (8-3), and a second fastener (9) is installed between the limiting sleeve (8) and the connecting shaft (5) for opening the limiting sleeve (8) and clamping the limiting sleeve (8) on the inner wall of the longitudinal through hole (4-2).

3. A universal door closer according to claim 1, characterized in that: The rocker arm (6) comprises a rocker rod (6-1) and a push rod (6-2) hinged to the rocker rod (6-1); the push rod (6-2) comprises a sleeve (6-2a), the sleeve (6-2a) is provided with a transverse insertion hole (6a-2a), the sleeve (6-2a) is provided with a longitudinal channel hole (6b-2a) penetrating the transverse insertion hole (6a-2a), a connecting rod (6-2b) is inserted into the transverse insertion hole (6a-2a), the outer end of the connecting rod (6-2b) is hinged with a connecting block (6-2c) that rotates in the longitudinal direction, the connecting block (6-2c) is hinged with a mounting seat (6-2d) that rotates in the transverse direction, and the connecting rod (6-2b) is threadedly connected with a third fastener (6-2e) that locks the connecting rod (6-2b) to move.

4. A combination of the universal door closer according to claim 2, characterized in that: It comprises a plurality of universal door closers installed side by side, wherein the connecting shaft (5) is fitted on each of the inner teeth (4-2a), and the limiting sleeve (8) is fastened to the bottom end of the connecting shaft (5) through a second fastener (9) and is stretched and clamped on the inner wall of the longitudinal through hole (4-2) at the end.

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