A door closer with damping buffer

Abstract

The utility model discloses a close door with damping buffer, including main body casing, the main body casing is connected with base through connecting rod, the piston is slidably connected in the main body casing inner chamber, the piston engages and connects gear, is provided with the spring between piston and main body casing inner wall, one -way valve is installed in both ends of the piston, the main body casing inner chamber is divided into three cavities by the piston, relate to the technical field of close door, through setting up the piston in the main body casing, the piston divides the main body casing inner chamber into three cavities, and sets up one -way valve at both ends of the piston, and left -hand chamber is provided with hydraulic oil, thereby when opening the door board, at this moment under the damping effect of hydraulic oil, avoid the quick opening of door board and hit the wall, simultaneously when spring drive piston resets, the hydraulic oil reduces the speed of piston reset, thereby reduce the intensity of door board and hit the door frame, thereby weaken the noise.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, specifically a door closer with damping buffer. Background Technology

[0002] A door closer is a hydraulic device similar to a spring on a door frame. When the door is opened, it is compressed and then released, automatically closing the door. Similar to a spring-loaded door, it ensures the door closes accurately and promptly to its initial position after being opened. Door closers are mainly used in commercial and public buildings, but they are also used in homes. They have many uses, the most important being to automatically close doors to limit the spread of fire and improve ventilation within a building. When a door closer is installed between the door panel and the door frame, when the door is opened, the door panel drives a gear to rotate via a linkage. The gear drives a piston to move, compressing a spring. When no one pushes the door, the spring force causes the piston to return to its original position, driving the gear to rotate in the opposite direction, thus closing the door and achieving the purpose of closing the door.

[0003] However, current door closers have the following shortcomings:

[0004] When the door is opened, the spring force causes the door panel to close quickly, resulting in a fast rotation speed of the door panel, which in turn causes the door panel to hit the door frame and generate a lot of noise. Utility Model Content

[0005] In view of the problems existing in the current door closer, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a door closer with damping buffer, which solves the problem that when the door is opened, the spring force causes the door panel to close quickly, resulting in a fast rotation speed of the door panel, which in turn causes the door panel to hit the door frame and generate a lot of noise.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0008] A damped door closer includes a main body housing, a base connected to the main body housing via a connecting rod, a piston slidably connected in the inner cavity of the main body housing, the piston meshing with a gear, a spring disposed between the piston and the inner wall of the main body housing, and one-way valves installed at both ends of the piston. The inner cavity of the main body housing is divided into three chambers by the piston, with a connecting flow channel between the two chambers on the left and between the two chambers on the right, and hydraulic oil disposed in the left chamber.

[0009] In a preferred embodiment of the damped door closer described in this utility model, a first mounting ring and a second mounting ring are welded to both ends of the spring, the first mounting ring is bolted to the inner wall of the main body housing, and the second mounting ring is bolted to the piston.

[0010] In a preferred embodiment of the damped door closer described in this utility model, a rotating shaft is fixedly connected to the inner wall of the gear, and the rotating shaft is rotatably connected to the main body housing.

[0011] As a preferred embodiment of the damped door closer described in this utility model, the three cavities are a first cavity, a second cavity, and a third cavity.

[0012] As a preferred embodiment of the door closer with damping buffer described in this utility model, the main body housing is provided with a first flow channel, and the two ends of the first flow channel are respectively provided with a first oil inlet and a first oil outlet, and the first oil inlet and the first oil outlet are respectively connected to a first cavity and a second cavity.

[0013] The main body shell is provided with a second flow channel, and the two ends of the second flow channel are respectively a second oil inlet and a second oil outlet, which are respectively connected to the second cavity and the third cavity.

[0014] As a preferred embodiment of the door closer with damping buffer described in this utility model, the right side of the main housing has an integral sub-housing, the main housing has a through hole communicating with the inner cavity of the sub-housing, a damper passes through the through hole, and one end of the damper is installed on the inner wall of the sub-housing by bolts.

[0015] Compared with existing technologies:

[0016] By installing a piston inside the main body housing, the piston divides the inner cavity of the main body housing into three chambers, and one-way valves are installed at both ends of the piston. Hydraulic oil is installed in the left chamber. When the door panel is opened, the damping effect of the hydraulic oil prevents the door panel from opening too quickly and hitting the wall. At the same time, when the spring drives the piston to return to its original position, the hydraulic oil reduces the speed of the piston's return, thereby reducing the force of the door panel hitting the door frame and thus reducing noise.

[0017] By setting a sub-shell at the end of the main shell and installing a damper inside the sub-shell, when the door panel is about to close, the piston contacts the damper, and the damper dampens and buffers the movement of the piston, thereby reducing the movement speed of the piston and reducing the impact between the door panel and the door frame. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model;

[0019] Figure 2 Figures provided for Embodiment 1 of this utility model;

[0020] Figure 3 Figures provided for Embodiment 1 of this utility model;

[0021] Figure 4 Figure provided for Embodiment 2 of this utility model.

[0022] In the diagram: main housing 1, connecting rod 3, base 5, spring 6, first mounting ring 61, second mounting ring 62, piston 7, piston disc 71, one-way valve 711, first flow channel 8, first oil inlet 81, first oil outlet 82, rotating shaft 9, gear 10, second flow channel 11, second oil inlet 111, second oil outlet 112, secondary housing 12, first cavity 13, second cavity 14, third cavity 15, damper 16. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Example 1

[0024] This utility model provides a door closer with damping buffer; please refer to [link / reference]. Figure 1-3 The system includes a main housing 1, which is connected to a base 5 via a connecting rod 3. A piston 7 is slidably connected within the inner cavity of the main housing 1. Both ends of the piston 7 have piston discs 71. The piston 7 meshes with a gear 10. A rotating shaft 9 is fixedly connected to the inner wall of the gear 10. The rotating shaft 9 is rotatably connected to the main housing 1. The inner cavity of the main housing 1 is divided into three chambers by the piston 7: a first chamber 13, a second chamber 14, and a third chamber 15. The volumes of the three chambers are not constant. The air between the two piston discs 71 constitutes the second chamber 14. A spring 6 is installed between the piston 7 and the inner wall of the main housing 1. Specifically, a first mounting ring 61 and a second mounting ring 62 are welded to both ends of the spring 6. The first mounting ring 61 is bolted to the inner wall of the main housing 1, and the second mounting ring 62 is bolted to the piston 7. A one-way valve 711 is installed on each of the two piston discs 71. When the door is opened (e.g., when the door is opened...), a check valve 711 is installed on each of the piston discs 71. Figure 2 When piston 7 moves to the left, hydraulic oil in the first chamber 13 enters the second chamber 14 through the first inlet 81, the first flow channel 8, and the first outlet 82. When the second chamber 14 is almost full of hydraulic oil, the right check valve 711 will be squeezed open, so that the hydraulic oil in the second chamber 14 will enter the third chamber 15. A connecting flow channel is provided between the two chambers on the left and the two chambers on the right, and hydraulic oil is provided in the left chamber.

[0025] The main body shell 1 is provided with a first flow channel 8, and the two ends of the first flow channel 8 are respectively provided with a first oil inlet 81 and a first oil outlet 82, and the first oil inlet 81 and the first oil outlet 82 are respectively connected to the first cavity 13 and the second cavity 14.

[0026] The main body shell 1 is provided with a second flow channel 11. The two ends of the second flow channel 11 are respectively provided with a second oil inlet 111 and a second oil outlet 112. The second oil inlet 111 and the second oil outlet 112 are respectively connected to the second cavity 14 and the third cavity 15.

[0027] In practical use, the main body shell 1 and the base 5 are respectively installed onto the door panel and the door frame; for example... Figure 2 During the opening of the door, the connecting rod 3 drives the rotating shaft 9 and gear 10 to rotate, thereby driving the piston 7 to move to the left, thus compressing the spring 6. At the same time, the piston 7 squeezes the hydraulic oil in the first chamber 13. The hydraulic oil in the first chamber 13 enters the second chamber 14 through the first oil inlet 81, the first flow channel 8 and the first oil outlet 82. The one-way valve 711 on the right end of the piston 7 is opened by the pressure of the hydraulic oil in the second chamber 14, and the hydraulic oil in the second chamber 14 enters the third chamber 15. When no one continues to push the door, the elastic force of the spring 6 drives the piston 7 to move to the right. The hydraulic oil in the third chamber 15 enters the second chamber 14 through the second oil outlet 112, the second flow channel 11 and the second oil inlet 111. The one-way valve on the left side of the piston 7 is opened under the pressure of the hydraulic oil, and the hydraulic oil in the second chamber 14 flows back to the first chamber 13. Example 2

[0028] See attached document Figure 4 Unlike Embodiment 1, the main body housing 1 has an integral sub-housing housing 12 on its right side. The main body housing 1 has a through hole that connects to the inner cavity of the sub-housing housing 12. A damper 16 passes through the through hole, and one end of the damper 16 is bolted to the inner wall of the sub-housing housing 12.

[0029] In practical use, the main body shell 1 and the base 5 are respectively installed onto the door panel and the door frame; for example... Figure 2During the opening of the door, the connecting rod 3 drives the rotating shaft 9 and gear 10 to rotate, thereby driving the piston 7 to move to the left, thus compressing the spring 6. Simultaneously, the piston 7 squeezes the hydraulic oil in the first chamber 13. The hydraulic oil in the first chamber 13 enters the second chamber 14 through the first inlet 81, the first flow channel 8, and the first outlet 82. The one-way valve 711 at the right end of the piston 7 is opened by the pressure of the hydraulic oil in the second chamber 14, allowing the hydraulic oil in the second chamber 14 to enter the third chamber 15. When no one continues... When the door is pushed, the spring force of spring 6 drives piston 7 to move to the right. The hydraulic oil in the third chamber 15 enters the second chamber 14 through the second oil outlet 112, the second flow channel 11, and the second oil inlet 111. The one-way valve on the left side of piston 7 opens under the pressure of the hydraulic oil, and the hydraulic oil in the second chamber 14 flows back to the first chamber 13. When the door panel is about to close, piston 7 contacts damper 16. Damper 16 dampens and buffers the movement of piston 7, thereby reducing the movement speed of piston 7 and reducing the impact between the door panel and the door frame.

[0030] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A damped door closer, comprising a main body housing (1), wherein the main body housing (1) is connected to a base (5) via a connecting rod (3), a piston (7) is slidably connected in the inner cavity of the main body housing (1), the piston (7) meshes with a gear (10), and a spring (6) is provided between the piston (7) and the inner wall of the main body housing (1), characterized in that: One-way valves (711) are installed at both ends of the piston (7). The inner cavity of the main body housing (1) is divided into three cavities by the piston (7). A connecting flow channel is provided between the two cavities on the left and between the two cavities on the right. Hydraulic oil is provided in the left cavity.

2. A door closer with damping buffer according to claim 1, characterized in that, The spring (6) has a first mounting ring (61) and a second mounting ring (62) welded to its two ends respectively. The first mounting ring (61) is connected to the inner wall of the main body housing (1) by bolts, and the second mounting ring (62) is connected to the piston (7) by bolts.

3. A door closer with damping buffer according to claim 1, characterized in that, The gear (10) has a rotating shaft (9) fixedly connected to its inner wall, and the rotating shaft (9) is rotatably connected to the main body shell (1).

4. A door closer with damping buffer according to claim 1, characterized in that, The three cavities are the first cavity (13), the second cavity (14), and the third cavity (15).

5. A door closer with damping buffer according to claim 1, characterized in that, The main body shell (1) is provided with a first flow channel (8), and the two ends of the first flow channel (8) are respectively provided with a first oil inlet (81) and a first oil outlet (82), and the first oil inlet (81) and the first oil outlet (82) are respectively connected to the first cavity (13) and the second cavity (14). The main body shell (1) is provided with a second flow channel (11), and the two ends of the second flow channel (11) are respectively provided with a second oil inlet (111) and a second oil outlet (112). The second oil inlet (111) and the second oil outlet (112) are respectively connected to the second cavity (14) and the third cavity (15).

6. A door closer with damping buffer according to claim 1, characterized in that, The main body housing (1) has an integral sub-housing housing (12) on its right side. The main body housing (1) has a through hole that connects to the inner cavity of the sub-housing housing (12). A damper (16) passes through the through hole. One end of the damper (16) is installed on the inner wall of the sub-housing housing (12) by bolts.

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