CN215408062U - Convex shaft for pneumatic automatic return device and pneumatic automatic return device - Google Patents
Convex shaft for pneumatic automatic return device and pneumatic automatic return device Download PDFInfo
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- CN215408062U CN215408062U CN202120273860.8U CN202120273860U CN215408062U CN 215408062 U CN215408062 U CN 215408062U CN 202120273860 U CN202120273860 U CN 202120273860U CN 215408062 U CN215408062 U CN 215408062U
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- shaft
- limiting part
- protruding shaft
- fan
- cambered surface
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Abstract
The utility model discloses a convex shaft for a pneumatic automatic return device and the pneumatic automatic return device, wherein the convex shaft for the pneumatic automatic return device comprises: the end face of the convex shaft is provided with a first limiting part and a second limiting part, and a first fan-shaped cambered surface and a second fan-shaped cambered surface are sequentially arranged between the first limiting part and the second limiting part; the first limiting part is higher than the second limiting part; the slope of the second fan-shaped cambered surface is greater than the slope of the first fan-shaped cambered surface. The two first limiting parts are symmetrically arranged on the end face; the two second limiting parts are symmetrically arranged on the end face; the first fan-shaped cambered surface and the second fan-shaped cambered surface are both 4 and are arranged along the end face. By adopting the rotating shaft structure with the matched lower convex shaft and upper convex shaft, the door can be closed tightly.
Description
Technical Field
The utility model relates to a pneumatic automatic return device, in particular to a convex shaft for the pneumatic automatic return device and the pneumatic automatic return device.
Background
The pneumatic automatic return device is a door closer, and adopts a compressed gas mode to provide power to enable the door to return to an original state after rotating a certain angle. The pneumatic automatic return device comprises an upper convex shaft and a lower convex shaft which are arranged up and down. When the door is opened and automatically closed, the lower convex shaft rotates along the upper convex shaft end surface to drive the door to be automatically closed. The existing rotating shaft structure has the condition of slow closing or even no closing when the door is about to be closed.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model aims to overcome the defects of the prior art and provide the convex shaft of the pneumatic automatic return device, which can enable the door to be closed tightly.
In order to achieve the aim, the utility model adopts the technical scheme that:
a protruding shaft for a pneumatic self-return device comprising:
the convex shaft is a lower convex shaft or an upper convex shaft body, the end face of the convex shaft is provided with a first limiting part and a second limiting part, and a first fan-shaped cambered surface and a second fan-shaped cambered surface are sequentially arranged between the first limiting part and the second limiting part;
the first limiting part is higher than the second limiting part;
the slope of the second fan-shaped cambered surface is greater than the slope of the first fan-shaped cambered surface.
The two first limiting parts are symmetrically arranged on the end face;
the two second limiting parts are symmetrically arranged on the end face;
the first fan-shaped cambered surface and the second fan-shaped cambered surface are both 4 and are arranged along the end face.
Further, when the protruding shaft is a lower protruding shaft, the lower protruding shaft is arranged at the bottom of the upper protruding shaft;
the upper convex shaft comprises a connecting shaft and an upper convex shaft body connected with the connecting shaft;
the end face of the upper convex shaft body is provided with an upper convex shaft cambered surface and a third limiting part;
the third limiting part is matched with the first limiting part and the second limiting part;
the end face of the lower protruding shaft can be attached to the end face of the upper protruding shaft body.
Further, when the protruding shaft is an upper protruding shaft body;
further comprising:
the end surface of the lower convex shaft is provided with a lower convex shaft cambered surface and a third limiting part;
the third limiting part is matched with the first limiting part and the second limiting part;
the upper convex shaft is arranged at the upper part of the lower convex shaft; the connecting shaft comprises a connecting shaft and an upper convex shaft body connected with the connecting shaft;
the end face of the lower protruding shaft can be attached to the end face of the upper protruding shaft body.
The first limiting part and the second limiting part are grooves, and the third limiting part is a boss.
The boss is fan-shaped boss, the recess is fan-shaped recess, fan-shaped boss's both sides cambered surface with the slope of fan-shaped recess's both sides cambered surface is unanimous.
One end of the connecting shaft is in a square conical shape.
One end of the connecting shaft is provided with a plurality of axial vertical wires along the circumferential direction.
The utility model also provides a pneumatic automatic return device, which comprises the convex shaft and further comprises:
the shell is of a hollow structure;
the piston is arranged in the shell below the lower convex shaft, and one end of the piston pushes the lower convex shaft against the upper convex shaft;
the sealed air chamber is a sealed cavity formed by an upper sealing element and a lower sealing element in the shell, high-pressure air is arranged in the sealed cavity, and one end of the piston extends into the sealed cavity;
the upper protruding shaft is arranged in the shell, and one end of the upper protruding shaft extends outwards from the end part of the shell;
and the lower convex shaft is arranged in the shell below the upper convex shaft and does reciprocating linear motion along the length direction of the shell relative to the shell.
Further, still include:
the bottom cover is arranged at the bottom of the shell and is provided with a threaded hole;
and one end of the screw rod extends into the threaded hole and abuts against the lower sealing element, so that the lower sealing element can move along the length direction of the shell.
The technical scheme provided by the embodiment of the utility model has the following beneficial effects:
by adopting the rotating shaft structure with the lower convex shaft and the upper convex shaft matched, when the upper convex shaft passes through the first fan-shaped cambered surface from the first limiting part to the second fan-shaped cambered surface and then reaches the second limiting part from the second fan-shaped cambered surface, the speed of the second fan-shaped cambered surface reaching the second limiting part is higher because the gradient of the second fan-shaped cambered surface is larger than that of the first fan-shaped cambered surface, so that a larger door closing impact force is formed, even if the door is provided with the wool tops for closing the door gap, the door can overcome the friction force caused by the wool tops due to the existence of the impact force, and the door is closed tightly.
Drawings
FIG. 1 is a schematic structural diagram of a protruding shaft for a pneumatic self-return device according to an embodiment of the present invention;
FIG. 2 is a front view of the drawing;
FIG. 3 is a rear view of FIG. 1;
FIG. 4 is a schematic structural diagram of an upper protruding shaft according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a pneumatic self-return device provided in an embodiment of the present invention.
In the figure:
1, a lower convex shaft, 10 a first limiting part, 11 a second limiting part, 12 a first fan-shaped cambered surface and 13 a second fan-shaped cambered surface;
2, a convex shaft, 20 connecting shafts, 21 convex shaft bodies and 22 third limiting parts;
3, a shell;
4, a piston is arranged on the piston rod,
5 air chamber, 51 upper seal, 52 lower seal.
6 adjusting device, 60 bottom cover and 61 screw rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, a protruding shaft for a pneumatic self-return device includes:
the convex shaft is a lower convex shaft or an upper convex shaft body, the end face of the convex shaft is provided with a first limiting part 10 and a second limiting part 11, and a first fan-shaped cambered surface 12 and a second fan-shaped cambered surface 13 are sequentially arranged between the first limiting part 10 and the second limiting part 11;
the first limiting part 10 is higher than the second limiting part 11;
the slope of the second sector arc surface 13 is greater than the slope of the first sector arc surface 12.
The slope of the second fan-shaped cambered surface is larger than that of the first fan-shaped cambered surface, and a hyperboloid structure is arranged from one displacement point to the other displacement point of the lower convex shaft, so that the impact force when the door is closed is improved, and the effect of tight door closing is achieved. The two end faces of the upper camshaft body and the lower camshaft body, which are contacted with each other, are respectively provided with a first limiting part and a second limiting part.
Preferably, in order to realize 180-degree rotation, the rotation can be stopped at any time every 90 degrees, and the two first limiting parts 10 are symmetrically arranged on the end face;
the two second limiting parts 11 are symmetrically arranged on the end surface;
the first fan-shaped cambered surface 12 and the second fan-shaped cambered surface 13 are 4 and are arranged along the end face.
In the embodiment, when the protruding shaft is the lower protruding shaft 1, the lower protruding shaft 1 is arranged at the bottom of the upper protruding shaft 2;
the upper protruding shaft 2 comprises a connecting shaft 20 and an upper protruding shaft body 21 connected with the connecting shaft 20;
the end face of the upper camshaft body 21 is provided with an upper camshaft cambered surface and a third limiting part 22;
the third limiting part 22 is matched with the first limiting part 10 and the second limiting part 11;
the end face of the lower protruding shaft 1 can be attached to the end face of the upper protruding shaft body 21.
The functions of rotary positioning and automatic return are realized through the matching of the upper convex shaft and the lower convex shaft.
The other technical scheme of the utility model is as follows:
when the protruding shaft is the protruding shaft body 21;
further comprising:
the end surface of the lower convex shaft is provided with a lower convex shaft cambered surface and a third limiting part;
the third limiting part is matched with the first limiting part and the second limiting part;
the upper convex shaft 2 is arranged at the upper part of the lower convex shaft 1; comprises a connecting shaft 20 and an upper convex shaft body 21 connected with the connecting shaft 20;
the end face of the lower protruding shaft 1 can be attached to the end face of the upper protruding shaft body 21.
In this embodiment, the upper convex shaft cambered surface and the lower convex shaft cambered surface can be replaced with each other, and the hyperboloid is arranged on the upper convex shaft body, so long as the lower convex shaft can perform linear and rotary motion along the shell, and the hyperboloid is arranged to realize quick closing.
In one embodiment, the first position-limiting part 10 and the second position-limiting part 11 are both grooves, and the third position-limiting part 22 is a boss.
The first limiting part and the second limiting part can be arranged to be bosses, the third limiting part can be arranged to be a groove, and the positioning and automatic returning functions can be achieved.
Referring to fig. 3, the boss is a fan-shaped boss, the groove is a fan-shaped groove, and the slopes of the arc surfaces on the two sides of the fan-shaped boss are consistent with those of the arc surfaces on the two sides of the fan-shaped groove.
The mutually matched boss and the groove are provided with the same radian, so that the effect of firm and stable positioning can be achieved, and the fan-shaped groove has the advantage of labor saving in closing.
Referring to fig. 4, one end of the connecting shaft 20 is square and tapered, and can be connected with a square interface.
Referring to fig. 1, one end of the connecting shaft 20 is provided with a plurality of axial vertical wires along the circumferential direction, and can be connected with a connector provided with an internal wire, so that the rotation of the connecting shaft can be effectively prevented.
Different structures at the end part of the connecting shaft can be fixedly connected with different fixtures, and the connecting shaft has the advantage of convenient connection and disassembly.
Referring to fig. 5, the present invention further provides a pneumatic self-returning device, including the above protruding shaft, further including:
the shell 3 is of a hollow structure;
the upper protruding shaft 2 is arranged in the shell 3, and one end of the upper protruding shaft extends outwards from the end part of the shell 3;
the lower protruding shaft 1 is arranged in the shell 3 below the upper protruding shaft 2, and relative to the shell 3, the lower protruding shaft 1 makes reciprocating linear motion along the length direction of the shell 1;
a piston 4 arranged in the housing 3 below the lower protruding shaft 1, one end of the piston pushing the lower protruding shaft 1 against the upper protruding shaft 2;
the sealed air chamber 5 is a sealed cavity formed by the upper sealing element 51 and the lower sealing element 52 in the shell 3, high-pressure gas is arranged in the sealed cavity, the high-pressure gas is preferably nitrogen, and one end of the piston 4 extends into the sealed cavity.
The pneumatic device also comprises an adjusting device 6 for adjusting the volume of the sealing cavity so as to be suitable for normal return of doors with different weights.
A bottom cover 60 disposed at the bottom of the housing 3 and having a screw hole formed therein;
a screw 61, one end of which extends into the threaded hole and abuts against the lower sealing element 52;
the lower seal 52 can be moved along the length of the housing 3 by adjusting the screw 61.
The position of the lower sealing piece of the closed air chamber can be changed through the adjusting screw rod, so that the space size of the closed air chamber and the air pressure of the closed air chamber are changed, the acting force on the piston, the lower convex shaft and the upper convex shaft is changed, the doors with different weights mounted on the upper convex shaft can be correspondingly adjusted, the return of different doors at different speeds is realized, and different requirements are met.
Referring to fig. 1 and 5, when the upper part of the upper protruding shaft 2 is fixed on the door frame, the housing 3 is rotatably installed on the door, when the door is rotated, the lower protruding shaft 1 rotates and moves downward relative to the housing 3, the door is opened by 90 degrees, the lower protruding shaft 1 and the upper protruding shaft 2 are arranged at an angle of 90 degrees and temporarily positioned, and the piston 4 against which the lower protruding shaft 1 abuts moves downward to further compress the gas in the sealed cavity. Loosen after the manual door that closes, rely on the high pressure in the sealed cavity to produce the effort to piston 4, and then transmit this effort to lower camshaft 1, drive the door and close by oneself, when the door is close to closing, because the slope of the fan-shaped cambered surface 13 of second is greater than the slope of first fan-shaped cambered surface 12, after the last camshaft reachs the fan-shaped cambered surface of second through first fan-shaped cambered surface, the closing speed of door can improve, under the condition that there is the wool top at the door, also can realize closing tight effect.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A protruding shaft for a pneumatic self-return device, comprising:
the convex shaft is a lower convex shaft or an upper convex shaft body, the end face of the convex shaft is provided with a first limiting part and a second limiting part, and a first fan-shaped cambered surface and a second fan-shaped cambered surface are sequentially arranged between the first limiting part and the second limiting part;
the first limiting part is higher than the second limiting part;
the slope of the second fan-shaped cambered surface is greater than the slope of the first fan-shaped cambered surface.
2. The protruding shaft for the pneumatic automatic return device according to claim 1, wherein the number of the first limiting portions is two, and the two first limiting portions are symmetrically arranged on the end surface;
the two second limiting parts are symmetrically arranged on the end face;
the first fan-shaped cambered surface and the second fan-shaped cambered surface are both 4 and are arranged along the end face.
3. Protruding shaft for pneumatic self-return device according to claim 1 or 2,
when the protruding shaft is a lower protruding shaft, the lower protruding shaft is arranged at the bottom of the upper protruding shaft;
the upper convex shaft comprises a connecting shaft and an upper convex shaft body connected with the connecting shaft;
the end face of the upper convex shaft body is provided with an upper convex shaft cambered surface and a third limiting part;
the third limiting part is matched with the first limiting part and the second limiting part;
the end face of the lower protruding shaft can be attached to the end face of the upper protruding shaft body.
4. Protruding shaft for pneumatic self-return device according to claim 1 or 2,
when the protruding shaft is the protruding shaft body;
further comprising:
the end surface of the lower convex shaft is provided with a lower convex shaft cambered surface and a third limiting part;
the third limiting part is matched with the first limiting part and the second limiting part;
the upper convex shaft is arranged at the upper part of the lower convex shaft; the connecting shaft comprises a connecting shaft and an upper convex shaft body connected with the connecting shaft;
the end face of the lower protruding shaft can be attached to the end face of the upper protruding shaft body.
5. The protruding shaft for the pneumatic automatic return device according to claim 3, wherein the first limiting portion and the second limiting portion are both grooves, and the third limiting portion is a boss.
6. The protruding shaft for the pneumatic automatic return device according to claim 5, wherein the boss is a fan-shaped boss, the groove is a fan-shaped groove, and the slopes of the arc surfaces at the two sides of the fan-shaped boss are consistent with the slopes of the arc surfaces at the two sides of the fan-shaped groove.
7. The protruding shaft for the pneumatic automatic return device according to claim 4, wherein one end of the connecting shaft is square-tapered.
8. The protruding shaft for the pneumatic automatic return device according to claim 4, wherein one end of the connecting shaft is provided with a plurality of axial vertical wires along the circumferential direction.
9. A pneumatic self-return device comprising the protruding shaft of any one of claims 1-8, further comprising:
the shell is of a hollow structure;
the piston is arranged in the shell below the lower convex shaft, and one end of the piston pushes the lower convex shaft against the upper convex shaft;
the sealed air chamber is a sealed cavity formed by an upper sealing element and a lower sealing element in the shell, high-pressure air is arranged in the sealed cavity, and one end of the piston extends into the sealed cavity;
the upper protruding shaft is arranged in the shell, and one end of the upper protruding shaft extends out of the end part of the shell;
the lower protruding shaft is arranged in the shell below the upper protruding shaft, and the lower protruding shaft does reciprocating linear motion along the length direction of the shell relative to the shell.
10. The pneumatic self-return apparatus of claim 9, further comprising:
the bottom cover is arranged at the bottom of the shell and is provided with a threaded hole;
and one end of the screw rod extends into the threaded hole and abuts against the lower sealing element, so that the lower sealing element can move along the length direction of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120273860.8U CN215408062U (en) | 2021-01-29 | 2021-01-29 | Convex shaft for pneumatic automatic return device and pneumatic automatic return device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120273860.8U CN215408062U (en) | 2021-01-29 | 2021-01-29 | Convex shaft for pneumatic automatic return device and pneumatic automatic return device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215408062U true CN215408062U (en) | 2022-01-04 |
Family
ID=79662253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120273860.8U Active CN215408062U (en) | 2021-01-29 | 2021-01-29 | Convex shaft for pneumatic automatic return device and pneumatic automatic return device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215408062U (en) |
-
2021
- 2021-01-29 CN CN202120273860.8U patent/CN215408062U/en active Active
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