Door closer with adjustable door opening buffer on side edge

Abstract

The utility model relates to a door closer with a side adjustable door opening buffer, which is provided with an adjusting valve from the side to adjust the door opening buffer so as to meet the installation requirements in different directions and ensure the door opening buffer adjusting function of the door closer. Comprising a door closer body, a hydraulic oil way arranged in the door closer body, a piston end cover, a rack piston, a buffer spring and a spring end cover, the piston end cover, the rack piston, the buffer spring and the spring end cover are sequentially arranged in the hydraulic oil way, a gear transmission rotating shaft is further vertically arranged on the door closer body in a penetrating mode, and the gear transmission rotating shaft is meshed with the rack piston. A two-way circulation oil way and an adjusting valve cavity are arranged on the end face of the same side of the door closer body and the spring end cover in an inward extending mode, a backflow speed adjusting valve is arranged in the adjusting valve cavity, and the two-way circulation oil way, the adjusting valve cavity and the hydraulic oil way are communicated with one another. The utility model is suitable for the field of door closer design and manufacture.

Description

Technical Field

[0001] The utility model relates to the field of design and manufacture of door closers, in particular to a door closer with adjustable door opening buffer on the side. Background Art

[0002] The door closer is a spring-like hydraulic device on the door head. When the door is opened, it can be compressed and then released to automatically close the door. It works like a spring door and can ensure that the door is accurately and promptly closed to the initial position after it is opened. The hydraulic door closer commonly used in modern buildings achieves a buffering effect by throttling the liquid in the door closer. This type of door closer generally adjusts the door opening buffering function from the front. This structure cannot take into account the installation requirements of both sides. When facing some special door leaf structure installation scenarios, it will limit the installation process. Even if the installation is completed, the regulating valve on the front of the door closer will be blocked by the door leaf structure, and the buffering function cannot be adjusted. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a door closer with side-adjustable door opening buffer, in which a regulating valve is arranged from the side to adjust the door opening buffer, thereby meeting the installation requirements in different directions and ensuring the door opening buffer adjustment function of the door closer.

[0004] The technical solution adopted by the utility model is: the utility model comprises a door closer body, a hydraulic oil circuit arranged in the door closer body, and a piston end cover, a rack piston, a buffer spring and a spring end cover arranged in sequence in the hydraulic circuit, a gear transmission shaft is also vertically penetrated through the door closer body, the gear transmission shaft and the rack piston are meshed with each other, a two-way circulation oil circuit and a regulating valve cavity are extended inwardly on the same side end surface of the door closer body and the spring end cover, a reflux speed regulating valve is arranged in the regulating valve cavity, and the two-way circulation oil circuit, the regulating valve cavity and the hydraulic oil circuit are all connected with each other.

[0005] Furthermore, the bidirectional circulation oil circuit includes a main oil circuit, a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole, wherein the regulating valve chamber is connected to the hydraulic oil circuit and the main oil circuit through the first connecting hole and the second connecting hole respectively, and the main oil circuit is connected to the hydraulic oil circuit through the third connecting hole and the fourth connecting hole.

[0006] Furthermore, the gear transmission shaft divides the hydraulic oil circuit into a first oil circuit and a second oil circuit, and the regulating valve chamber is connected to the second oil circuit through the first connecting hole.

[0007] Furthermore, the third connecting hole and the fourth connecting hole are both arranged on the side of the main oil circuit away from the spring end cover. In the initial state, the rack piston blocks the fourth connecting hole, and the main oil circuit is connected with the second oil circuit through the third connecting hole. In the door open state, the rack piston blocks the third connecting hole, and the main oil circuit is connected with the first oil circuit through the fourth connecting hole.

[0008] Furthermore, the first connecting hole is arranged at a middle position of the regulating valve cavity, and the second connecting hole is arranged at a bottom position of the regulating valve cavity.

[0009] Furthermore, one-way valves are provided at both ends of the rack piston.

[0010] Finally, the door closer body is made of aluminum die-casting.

[0011] The beneficial effect of the utility model is as follows: the utility model sets the regulating valve on the side of the door closer body, and redesigns the internal circulating oil circuit according to this design, that is, the hydraulic oil circuit, the main oil circuit and the regulating valve chamber are connected through the first connecting hole, the second connecting hole, the third connecting hole and the fourth connecting hole respectively, and a two-way circulating oil circuit suitable for the side regulating valve is formed inside the door closer body, which realizes the door closer side end face adjustment control door opening buffer function, while breaking the installation limitation of the door closer, so that the product can be installed from different directions on both sides, meeting various installation scenarios such as left-hand door, right-hand door, hinge side, hinge back and other installation scenarios. Therefore, the utility model sets the regulating valve from the side to adjust the door opening buffer, so as to meet the installation requirements in different directions and ensure the door opening buffer adjustment function of the door closer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a side view structural schematic diagram of the utility model;

[0013] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0014] Figure 3 yes Figure 1 Schematic diagram of a partially enlarged cross section of BB. DETAILED DESCRIPTION

[0015] like Figure 1 , Figure 2 and Figure 3As shown, the utility model comprises a door closer body 1, a hydraulic oil circuit arranged in the door closer body 1, and a piston end cover 2, a rack piston 3, a buffer spring 4 and a spring end cover 5 arranged in sequence in the hydraulic oil circuit. A gear transmission shaft 6 is also vertically penetrated on the door closer body 1, and the gear transmission shaft 6 is meshed with the rack piston 3. A two-way circulation oil circuit and a regulating valve cavity 7 are extended inward on the same side end surface of the door closer body 1 and the spring end cover 5. A reflux speed regulating valve 8 is arranged in the regulating valve cavity 7. The two-way circulation oil circuit, the regulating valve cavity 7 and the hydraulic oil circuit are all connected to each other. A one-way valve 16 is arranged at both ends of the rack piston 3. The door closer body 1 is made of aluminum die-casting.

[0016] In this embodiment, the bidirectional circulation oil circuit includes a main oil circuit 9, a first connecting hole 10, a second connecting hole 11, a third connecting hole 12 and a fourth connecting hole 13, wherein the regulating valve chamber 7 is connected to the hydraulic oil circuit and the main oil circuit 9 through the first connecting hole 10 and the second connecting hole 11, respectively, and the main oil circuit 9 is connected to the hydraulic oil circuit through the third connecting hole 12 and the fourth connecting hole 13. The gear transmission shaft 6 divides the hydraulic oil circuit into a first oil circuit 14 and a second oil circuit 15, and the regulating valve chamber 7 is connected to the second oil circuit 15 through the first connecting hole 10, wherein the volume ratio of the first oil circuit 14 and the second oil circuit 15 changes with the movement of the rack piston 3.

[0017] In the present utility model, the third connecting hole 12 and the fourth connecting hole 13 are both arranged on the main oil circuit 9 away from the spring end cover 5. In the initial state, the rack piston 3 blocks the fourth connecting hole 13, and the main oil circuit 9 is connected to the second oil circuit 15 through the third connecting hole 12. In the door opening state, the rack piston 3 blocks the third connecting hole 12, and the main oil circuit 9 is connected to the first oil circuit 14 through the fourth connecting hole 13. The first connecting hole 10 is arranged in the middle position of the regulating valve cavity 7, and the second connecting hole 11 is arranged at the bottom position of the regulating valve cavity 7. By rotating the reflux speed regulating valve 8 and adjusting its position in the regulating valve cavity 7, the opening and closing states of the first connecting hole 10 and the second connecting hole 11 are realized, so that the door opening buffer function is steplessly adjusted on the side end surface of the door closer.

[0018] The utility model arranges the regulating valve on the side of the door closer body, and redesigns the internal circulating oil circuit according to this design, that is, the hydraulic oil circuit, the main oil circuit 9 and the regulating valve chamber 7 are connected through the first connecting hole 10, the second connecting hole 11, the third connecting hole 12 and the fourth connecting hole 13 respectively, and a two-way circulating oil circuit suitable for the side regulating valve is formed inside the door closer body 1, which realizes the door opening buffer function of the side end face adjustment control of the door closer and breaks the installation limitation of the door closer, so that the product can be installed from different directions on the front and back sides, meeting various installation scenarios such as left-hand door, right-hand door, hinge side, hinge back and other installation scenarios.

[0019] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A door closer with side adjustable door opening buffer, comprising a door closer body (1), a hydraulic oil circuit arranged in the door closer body (1), and a piston end cover (2), a rack piston (3), a buffer spring (4) and a spring end cover (5) arranged in sequence in the hydraulic circuit, a gear transmission shaft (6) vertically penetrating the door closer body (1), the gear transmission shaft (6) and the rack piston (3) meshing with each other, characterized in that: A two-way circulating oil circuit and a regulating valve chamber (7) are provided on the same side end surfaces of the door closer body (1) and the spring end cover (5) and extend inwardly, a return speed regulating valve (8) is provided in the regulating valve chamber (7), and the two-way circulating oil circuit, the regulating valve chamber (7) and the hydraulic oil circuit are all interconnected.

2. A door closer with side adjustable door opening buffer according to claim 1, characterized in that: The bidirectional circulation oil circuit comprises a main oil circuit (9), a first connecting hole (10), a second connecting hole (11), a third connecting hole (12) and a fourth connecting hole (13), wherein the regulating valve chamber (7) is connected to the hydraulic oil circuit and the main oil circuit (9) respectively through the first connecting hole (10) and the second connecting hole (11), and the main oil circuit (9) is connected to the hydraulic oil circuit through the third connecting hole (12) and the fourth connecting hole (13).

3. A door closer with side adjustable door opening buffer according to claim 2, characterized in that: The gear transmission shaft (6) divides the hydraulic oil circuit into a first oil circuit (14) and a second oil circuit (15), and the regulating valve chamber (7) is connected to the second oil circuit (15) through the first connecting hole (10).

4. A door closer with side-adjustable door opening buffer according to claim 3, characterized in that: The third connecting hole (12) and the fourth connecting hole (13) are both arranged on a side of the main oil circuit (9) away from the spring end cover (5); in an initial state, the rack piston (3) blocks the fourth connecting hole (13), and the main oil circuit (9) is connected to the second oil circuit (15) through the third connecting hole (12); in an open door state, the rack piston (3) blocks the third connecting hole (12), and the main oil circuit (9) is connected to the first oil circuit (14) through the fourth connecting hole (13).

5. A door closer with side-adjustable door opening buffer according to claim 4, characterized in that: The first connecting hole (10) is arranged at a middle position of the regulating valve cavity (7), and the second connecting hole (11) is arranged at a bottom position of the regulating valve cavity (7).

6. A door closer with side-adjustable door opening buffer according to claim 5, characterized in that: Both ends of the rack piston (3) are provided with one-way valves (16).

7. A door closer with side-adjustable door opening buffer according to claim 6, characterized in that: The door closer body (1) is made of die-cast aluminum.

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