Door closer piston with door opening buffering function

Abstract

The utility model discloses a door-opening buffering door closer piston which comprises a shell, and a one-way valve hole is formed in the head of the shell. The upper section of the shell is a cylinder, a shallow groove is formed in the surface of the upper section, and an oil passing hole is formed in the shallow groove. The lower section of the shell is a hollow cylinder, and an inner cavity of the cylinder is communicated with the one-way valve hole; symmetrical one-way valves are fixedly installed at the two ends of the one-way valve hole, and an inner cavity between the symmetrical one-way valves is communicated with the oil passing hole. Steel balls are arranged in the symmetrical one-way valves, and check blocks are arranged on the inner walls of the symmetrical one-way valves to seal the steel balls in the one-way valves. The utility model relates to the technical field of door closers. The piston of the door opening buffering door closer solves the problems that oil passing holes need to be formed in the two ends of meshing teeth of an existing piston of the door opening buffering door closer, the positions of the oil passing holes cannot be shifted, the sizes of the oil passing holes are the same, the machining technology is complex, and the manufacturing cost is high.

Description

Technical Field

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

[0002] A door closer, also known as a modern hydraulic door closer, is a spring-like hydraulic device mounted on top of the door. Its working principle is as follows: When the door is opened, the door body drives a connecting rod, causing a gear to rotate and engage with the meshing teeth on the door closer piston, moving the piston to the right. During this rightward movement, the spring is compressed, and the hydraulic oil in the right chamber is also pressurized. The one-way valve on the piston opens under oil pressure, allowing the hydraulic oil in the right chamber to flow to the left chamber through a ball valve. When the opening process is complete, the spring, compressed during opening, is released, pushing the door closer piston to the left, causing the gear and connecting rod to rotate, thus closing the door.

[0003] In existing door opening buffer door closing devices, the piston has through holes at both ends of the meshing teeth to allow hydraulic oil to flow. However, it is required that the through holes on each meshing tooth cannot be offset and must be the same size, which makes the manufacturing process relatively complicated. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a door opening buffer door closer piston, which solves the problems of existing door opening buffer door closers where the piston needs to have through holes on each meshing tooth, the position cannot be offset and the size must be the same, the processing technology is complicated and the manufacturing cost is high.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a door opening buffer door closing piston, comprising a housing, wherein the surface of the middle section of the housing is provided with meshing teeth; the head of the housing is provided with a one-way valve hole; the upper section of the housing is a cylinder with a shallow groove on its surface, and an oil passage hole is formed in the shallow groove; the lower section of the housing is a hollow cylinder, and the inner cavity of the cylinder is connected to the one-way valve hole; symmetrical one-way valves are fixedly installed at both ends of the one-way valve hole, and the inner cavity between the symmetrical one-way valves is connected to the oil passage hole formed in the shallow groove; each of the symmetrical one-way valves is provided with a steel ball, and each of its inner walls is provided with a baffle to seal the steel ball inside.

[0006] Preferably, the surface of the middle section of the housing is provided with meshing teeth.

[0007] Preferably, the head of the housing is provided with a one-way valve port.

[0008] Preferably, the surface of the upper section of the housing is provided with a shallow groove, and an oil passage hole is formed in the shallow groove.

[0009] Preferably, symmetrical one-way valves are fixedly installed at both ends of the one-way valve orifice.

[0010] Preferably, the inner cavity between the symmetrical one-way valves is connected to the oil passage hole opened on the shallow groove.

[0011] Preferably, the inner wall of each of the symmetrical one-way valves is provided with a baffle to seal the steel ball inside.

[0012] Beneficial effects

[0013] This utility model provides a door opening buffer piston for a door closer. Compared with the prior art, it has the following advantages:

[0014] 1. The piston of this door opening buffer door closer eliminates the through hole on the meshing teeth and directly sets an oil passage hole on the surface of the housing, which reduces the complexity of the piston manufacturing process while realizing the circulation of hydraulic oil.

[0015] 2. The piston of this door opening buffer door closer can filter the circulating hydraulic oil by setting a filter screen in the inner cavity between the symmetrical one-way valves. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 The structure of this utility model Figure 1 Enlarged view of a portion of point A in the middle;

[0018] Figure 3 This is a bottom view of the structure of this utility model;

[0019] Figure 4 This is a cross-sectional view of the structure of this utility model.

[0020] In the diagram: 1. Housing; 2. Engaging teeth; 3. Shallow groove; 4. Oil passage hole; 5. Symmetrical check valve; 6. Stop block; 7. Steel ball; 8. Filter screen. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0022] Please see Figure 1-4This utility model provides a technical solution: a door opening buffer door closing piston, including a housing 1. The head of the housing 1 is provided with a one-way valve hole. A shallow groove 3 is opened on the surface of one end of the housing 1. The shallow groove 3 is inclined to facilitate the flow of hydraulic oil. An oil passage hole 4 is opened on the shallow groove 3. The other end of the housing 1 is a hollow cylinder, and the inner cavity of the cylinder is connected to the one-way valve hole. Symmetrical one-way valves 5 are fixedly installed at both ends of the one-way valve hole. The inner cavity between the symmetrical one-way valves is connected to the oil passage hole 4 opened on the shallow groove 3. A steel ball 7 is provided in each of the symmetrical one-way valves 5. A baffle 6 is provided on the inner wall of each of the symmetrical one-way valves 5. The baffle 6 can prevent the steel ball 7 from falling out of the symmetrical one-way valve 5. The inner wall of the opposite opening end of the symmetrical one-way valve 5 is arc-shaped, which matches the shape of the steel ball 7. After the steel ball 7 contacts the arc-shaped inner wall, it forms a seal on the hydraulic oil inside and prevents it from flowing out.

[0023] When in use, when the door is opened, the door body drives the linkage to move, and the gear rotates and meshes with the meshing teeth 2 on the piston housing 1 of the door closer, driving the piston housing 1 of the door closer to move to the right. At this time, the hydraulic oil located outside the housing 1 will first flow on the surface of the meshing teeth 2, and after flowing, it will enter the shallow groove 3. By collecting the hydraulic oil, it will flow better into the oil passage hole 4. The pressure generated at this time will cause the hydraulic oil to flow to the left, and the inner cavity of the housing 1 will also generate pressure to the left. Therefore, the steel balls 7 in the symmetrical one-way valve 5 will all move to the left, causing the steel balls 7 on the right to move and fit against the arc inner wall of the right symmetrical one-way valve 5 to form a seal, while the steel balls 7 on the left will abut against the stop block 6 and will not seal. The hydraulic oil entering the oil passage hole 4 will also flow to the left, be filtered by the filter screen 8, and flow out from the gap between the symmetrical one-way valve 5 and the stop block 6.

[0024] When the door is closed, the hydraulic oil circulates again and enters the oil passage 4 again as described above. At this time, the hydraulic oil flows to the right. Therefore, the steel ball 7 on the left fits against the inner arc of the symmetrical one-way valve 5 on the left, forming a seal. The hydraulic oil flowing to the right into the oil passage 4 pushes the steel ball 7 on the right, causing the steel ball 7 to press against the stop block 6, thus breaking the seal and allowing the hydraulic oil to flow out from the inner cavity of the housing 1.

[0025] By eliminating the through hole on the meshing tooth 2 and directly setting a single oil passage hole 4, the complexity of the piston machining process is greatly reduced while achieving hydraulic oil circulation.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A door-opening buffer door closer piston, comprising a housing (1), characterized in that: The head of the housing (1) is provided with a one-way valve hole; The upper section of the shell (1) is cylindrical, and a shallow groove (3) is provided on the surface. An oil passage hole (4) is provided on the shallow groove (3). The lower section of the housing (1) is a hollow cylinder. The inner cavity of the cylinder is connected to the one-way valve hole, and symmetrical one-way valves (5) are fixedly installed at both ends of the one-way valve hole. The inner cavity between the symmetrical one-way valves (5) is connected to the oil passage hole (4) opened on the shallow groove (3). Each of the symmetrical one-way valves (5) is equipped with a steel ball (7), and each of its inner walls is equipped with a baffle (6) to seal the steel ball (7) inside.

2. The door opening buffer door closer piston according to claim 1, characterized in that: The surface of the middle section of the housing (1) is provided with meshing teeth (2).

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