CN220621529U - Center hanging door closer - Google Patents
Center hanging door closer Download PDFInfo
- Publication number
- CN220621529U CN220621529U CN202322094445.8U CN202322094445U CN220621529U CN 220621529 U CN220621529 U CN 220621529U CN 202322094445 U CN202322094445 U CN 202322094445U CN 220621529 U CN220621529 U CN 220621529U
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- CN
- China
- Prior art keywords
- piston
- cylinder
- torsion spring
- piston cylinder
- guide rod
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- 238000004146 energy storage Methods 0.000 claims abstract description 13
- 238000005219 brazing Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005381 potential energy Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
Abstract
The utility model discloses a central door closer, which comprises a cylinder barrel, a spline shaft, a piston cylinder and a torsion spring energy storage device, wherein the cylinder barrel and the spline shaft are fixed together by a pin; the piston cylinder and the torsion spring energy storage device are sequentially arranged in the cylinder barrel from bottom to top; the piston cylinder is internally provided with a piston, the middle part of the piston is provided with a cam groove, a pin shaft is inserted into the piston cylinder, the pin shaft is provided with a roller, and the roller is arranged in the cam groove through the pin shaft; the lower end of the piston cylinder is provided with a connecting sleeve and a guide rod, the connecting sleeve and the guide rod are fixed together through brazing, and the lower end of the guide rod is connected with the torsion spring energy storage device through a spline. The multi-head screw mechanism of the piston is changed, sliding friction during operation is changed into rolling friction, the structure is simple, the manufacturing cost is low, and the multi-head screw mechanism is lighter and more flexible when the door is opened and closed.
Description
Technical Field
The utility model belongs to the field of machining, and particularly relates to a central suspended door closer.
Technical Field
The traditional central door closer uses the torsion spring to store energy, converts the elastic potential energy of the torsion spring into door closing force when closing the door, drives the inner piston to move up and down, and changes the door closing speed by controlling the speed of the piston. The center hanging door closer comprises a cylinder barrel, a torsion spring and a piston are arranged in the cylinder barrel, a cam is arranged in the piston, a pin shaft is arranged in the cam, the pin shaft is connected with the cam, the processing cost and the processing difficulty are high, the requirement on the material of the pin shaft is high, and on the other hand, larger thrust is required to be used when the door is opened, so that the door closer is inconvenient to use.
Disclosure of Invention
The utility model aims to provide the central door closer which is simple in structure, low in cost and convenient to operate.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the cylinder barrel and the spline shaft are fixed together by pins; the piston cylinder and the torsion spring energy storage device are sequentially arranged in the cylinder barrel; the piston cylinder is internally provided with a piston, the middle part of the piston is provided with a cam groove, a pin shaft is inserted into the piston cylinder, the pin shaft is provided with a roller, and the roller is arranged in the cam groove through the pin shaft; the lower end of the piston cylinder is provided with a connecting sleeve and a guide rod, the connecting sleeve and the guide rod are fixed together through brazing, and the lower end of the guide rod is connected with the torsion spring energy storage device through a spline.
The multi-head screw mechanism of the piston is changed, sliding friction during operation of the multi-head screw mechanism is changed into rolling friction, the structure is simple, the manufacturing cost is low, and the multi-head screw mechanism is lighter and more flexible when a door is opened and closed.
Furthermore, the piston is provided with internal spline teeth, and the spline shaft is provided with external spline teeth matched with the internal spline teeth.
Furthermore, the inside of the piston is pressed with a one-way valve, an oil needle through hole is arranged in the middle of the one-way valve, a tapered oil needle is arranged in the oil needle hole, and the oil needle hole is in threaded fit with the oil needle.
The conical oil needle and the oil needle hole which are matched with each other through threads can freely adjust the oil pressure on two sides of the piston cylinder, so that the door closing speed of the door closer can be adjusted.
Drawings
FIG. 1, a schematic diagram of a center hung door closer;
FIG. 2 is a schematic view of the torsion spring portion of the center hung door closer;
in the figure: 1. the device comprises a cylinder barrel, 2, a spline shaft, 3, an oil needle, 4, a one-way valve, 5, a piston cylinder, 6, a pin shaft, 7, a roller, 8, a buffer spring, 9, a torsion spring, 10, a guide rod, 11, a connecting sleeve, 12, an oil cavity, 13, a piston, 14, an upper oil cavity, 15 and a torsion spring energy storage device.
Detailed Description
The center hung door closer of the present utility model is further described below with reference to fig. 1 and 2.
The central door closer comprises a cylinder barrel 1, a spline shaft 2, a piston cylinder 5 and a torsion spring energy storage device 15, wherein the cylinder barrel 1 and the spline shaft 2 are fixed together through pins.
The torsion spring energy storage device 15 is arranged at the lower end of the piston cylinder 5 in the cylinder barrel; the piston cylinder is internally provided with a piston 13, the middle part of the piston is provided with a cam groove, the piston cylinder is inserted with a pin shaft 6, the pin shaft is provided with a roller, and the roller is arranged in the cam groove through the pin shaft.
The piston cylinder divides the cylinder body into upper and lower portions which, when filled, form an upper chamber 14 and a lower chamber 12.
The inside of the piston is pressed with a one-way valve, an oil needle through hole is arranged in the middle of the one-way valve, a tapered oil needle is arranged in the oil needle hole, and the oil needle hole is in threaded fit with the oil needle.
Because the oil needle 3 has taper, the size of the gap between the oil needle 3 and the oil needle hole can be controlled by adjusting the screw thread at the top end up and down, thereby controlling the flow rate of oil. Finally, the purpose of controlling the door closing speed is achieved.
The lower end of the piston cylinder 1 is provided with a connecting sleeve 11 and a guide rod 10, the connecting sleeve and the guide rod are fixed together through brazing, and the lower end of the guide rod is connected with the torsion spring energy storage device through a spline.
In the scheme of the utility model, the one-way valve 4 is pressed in the piston 13, an oil needle hole is arranged in the middle of the one-way valve 4, a gap is reserved between the oil needle 3 and the oil needle hole, and the piston cylinder 5 can form an upper oil cavity 14 and a lower oil cavity 12.
After the installation, the roller 7 is just in the middle of the cam groove, and the middle part of the piston 13 is provided with the cam groove.
When the door is opened, the cylinder barrel 1 and the spline shaft 2 rotate together, and the spline teeth on the spline shaft 2 drive the piston 13 to rotate, so that the positions of the pin shaft 6 and the idler wheel 7 are fixed. When the piston 13 rotates, the pin shaft 6 and the roller 7 generate rolling friction with the cam groove, and the piston 13 moves upwards. The buffer spring 8 is slowly released, and at this time, the oil in the upper oil chamber 14 flows into the lower oil chamber 12 through the single valve 4 and the gap between the oil needle 3 and the oil needle through hole. The torsion spring energy storage device 15 stores energy under the action of the guide rod 10 and the cylinder barrel 1.
When the door is closed, the torsion spring 9 releases elastic potential energy to drive the cylinder barrel 1 and the spline shaft to rotate, the spline shaft 2 drives the piston 13 to rotate through spline teeth, the piston 13 generates downward movement under the action of the roller 7 and the cam groove, the one-way valve 4 is closed at the moment, and oil in the lower oil cavity 12 can only flow to the upper oil cavity 14 through a gap between the oil needle 3 and the oil needle through hole. Because the oil needle 3 has taper, the size of the gap between the oil needle 3 and the oil needle through hole can be controlled by adjusting the screw thread at the top end up and down, thereby controlling the flow rate of oil. Finally, the purpose of controlling the door closing speed is achieved. At the same time, the buffer spring 8 at the lower end of the piston 13 is extruded, so that the movement of the piston 13 is more relaxed, and finally the change of the door closing speed is more uniform.
Under the same condition, the rolling friction is only 1/40 to 1/60 of the sliding friction resistance, so the technical scheme of the utility model greatly reduces the friction force, reduces the kinetic energy loss, and ensures that the central door closer is lighter and more flexible when the door is opened or closed. And the processing cost and the processing difficulty of the multi-head thread are higher. The manufacturing cost is greatly reduced after improvement.
Claims (3)
1. The central door closer comprises a cylinder barrel, a spline shaft, a piston cylinder and a torsion spring energy storage device, and is characterized in that the cylinder barrel and the spline shaft are fixed together by a pin; the piston cylinder and the torsion spring energy storage device are sequentially arranged in the cylinder barrel from bottom to top; the piston cylinder is internally provided with a piston, the middle part of the piston is provided with a cam groove, a pin shaft is inserted into the piston cylinder, the pin shaft is provided with a roller, and the roller is arranged in the cam groove through the pin shaft; the lower end of the piston cylinder is provided with a connecting sleeve and a guide rod, the connecting sleeve and the guide rod are fixed together through brazing, and the lower end of the guide rod is connected with the torsion spring energy storage device through a spline.
2. A centre-hung door closer according to claim 1, wherein the piston is provided with internal spline teeth and the spline shaft is provided with external spline teeth which are matched with the internal spline teeth.
3. A centre-hung door closer according to claim 1 or 2, wherein the piston has a one-way valve pressed therein, an oil needle through hole is provided in the middle of the one-way valve, the oil needle hole is provided with a tapered oil needle, and the oil needle hole is in threaded engagement with the oil needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322094445.8U CN220621529U (en) | 2023-08-06 | 2023-08-06 | Center hanging door closer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322094445.8U CN220621529U (en) | 2023-08-06 | 2023-08-06 | Center hanging door closer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220621529U true CN220621529U (en) | 2024-03-19 |
Family
ID=90216474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322094445.8U Active CN220621529U (en) | 2023-08-06 | 2023-08-06 | Center hanging door closer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220621529U (en) |
-
2023
- 2023-08-06 CN CN202322094445.8U patent/CN220621529U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |