CN204552371U - One is closed the door bounce cylinder - Google Patents

Abstract

The utility model discloses a door-closing buffer cylinder, which comprises a connecting seat and a front end cover, the connecting seat and the front end cover are connected through a first cylinder barrel, a first piston is movable in the first cylinder barrel, and a second piston is arranged on the first piston barrel. A piston rod, a first rodless chamber is formed between the connecting seat, the first cylinder and the first piston, a first rod chamber is formed between the front end cover, the first cylinder and the first piston, and the connecting seat is provided with There is a first clearance hole communicating with the first rodless chamber, the front end cover is provided with a first exhaust hole communicating with the first rod chamber, and the first piston is provided with a hole to communicate with the first rodless chamber and the first There is a first flow channel hole in the rod chamber, and a first one-way sealing gasket matched with the first flow channel hole is embedded in the rear end of the first piston. The utility model has the advantages of simple and reasonable structure, better cushioning effect, longer service life, lower use cost, more convenient control and wider application range.

Description

A door closing buffer cylinder

technical field

The utility model relates to the technical field of door closing buffer devices, in particular to a door closing buffer cylinder.

Background technique

In the automatic door system, in order to avoid collision between the door and the door frame (or door and door) when closing the door, which will affect the service life of the door, a door closing buffer device is usually installed on the door. Existing door-closing buffer devices are mainly spring automatic return type, and some adopt anti-collision rubber strips as buffer devices. However, the above two existing buffering forms all belong to forced elastic buffering and have a limited service life. In addition, there is also a sensor signal on the market to control the movement state of the door. By installing a sensor at a specific position on the door frame, when the door is closed, when the door moves to the position of the sensor, the sensor will feed back the signal to the electronic control unit, and the electronic control unit will directly Reduce the movement speed of the door, and then have the effect of decelerating the door at the moment of closing. However, this control method using sensor signals has strict requirements on the design of the electronic control unit, which is not only difficult to control, but also expensive to use, resulting in limited applicable occasions and difficult to be widely promoted.

Utility model content

The purpose of the utility model is to provide a door-closing buffer cylinder with simple and reasonable structure, better buffer effect, longer service life, lower use cost, more convenient control and wider application range in view of the defects and deficiencies of the prior art.

In order to achieve the above object, the utility model adopts the following technical solutions:

A door-closing buffer cylinder described in the utility model includes a connecting seat and a front end cover, the connecting seat and the front end cover are connected through a first cylinder, and a first piston is movably arranged in the first cylinder, The first piston is provided with a first piston rod, the free end of the first piston rod passes through the front end cover and protrudes from the outside of the first cylinder, the connecting seat, the first A first rodless chamber is formed between the cylinder and the first piston, a first rod chamber is formed between the front end cover, the first cylinder and the first piston, and the connecting seat A first clearance hole communicating with the first rodless chamber is provided, a first exhaust hole communicating with the first rod chamber is provided on the front end cover, and the first piston is provided with a The first rodless chamber communicates with the first flow channel hole of the first rod chamber, and the rear end of the first piston is embedded with a first one-way seal mated with the first flow channel hole, so The front end surface of the first one-way sealing gasket is set as a tapered surface, and the rear end surface of the first one-way sealing gasket is set as a plane.

Further, it also includes a rear end cover, the connecting seat and the rear end cover are connected through a second cylinder, a second piston is movably arranged in the second cylinder, and a first piston is arranged on the second piston. Two piston rods, the free end of the second piston rod passes through the rear end cover and protrudes from the outside of the second cylinder, the connecting seat, the second cylinder and the second piston A second rodless cavity is formed between them, a second rod cavity is formed between the rear end cover, the second cylinder and the second piston, and the connecting seat is provided with the second The second hole connected to the rodless chamber, the rear end cover is provided with a second vent hole connected to the second rod chamber, and the second piston is provided with a hole for communicating with the second rodless chamber. The rod cavity and the second flow channel hole of the second rod cavity, the front end of the second piston is embedded with a second one-way sealing gasket matched with the second flow channel hole, the second one-way The front end surface of the sealing gasket is set as a plane, and the rear end surface of the second one-way sealing gasket is set as a conical surface.

Further, a first sealing ring and a first wear-resistant ring are respectively embedded between the first piston and the first cylinder, and a The second sealing ring and the second wear ring.

Further, the front end of the first piston is provided with a first anti-collision pad matched with the front end cover, and the rear end of the second piston is provided with a second anti-collision pad matched with the rear end cover .

The beneficial effects of the utility model are: the utility model provides a door-closing buffer cylinder, the free end of the first piston rod is installed on the door, when the door control unit issues a door-closing command, the first piston rod is driven by the automatic door When the first piston rod is retracted, the volume of the first rodless cavity is reduced. Since the front end surface of the first one-way gasket is set as a tapered surface, and the rear end surface is set as a plane, the first rod cavity and the second rod cavity are in the process of retracting the first piston rod. The passage between the rodless chambers is closed, and the air inside the first rodless chamber will not enter the first rodless chamber. At this time, the compressed air in the first rodless chamber is discharged through the first gap hole, thereby realizing The buffer decelerates the automatic door; when the door control unit sends out the door opening command, the first piston rod stretches out. A conduction state is formed. At this time, part of the air in the first rod chamber is discharged through the first exhaust port, and the other part flows into the first rodless chamber through the first flow channel hole, thereby ensuring the normal opening of the automatic door. At the same time, the air in the first rodless cavity is effectively compensated.

In summary, the utility model is provided with a hole on the connecting seat, specifically, the hole diameter of the first hole (or the second hole) is about 0.15mm, and when the piston rod is retracted, the rodless cavity The air inside is discharged through the corresponding gaps. Specifically, the moving speed of the first piston rod (or the second piston rod) is about 10mm/s during this process, so as to effectively play the role of deceleration and buffering. Compared with the prior art Compared with the utility model, the structure setting of the utility model is simple, the buffering effect is good, and the service life is long. At the same time, the utility model does not need to install a sensor, thereby reducing the design difficulty of the electronic control unit, convenient control, low cost of use, and the scope of application wider. In addition, the utility model does not need to be inflated when working, and only needs the air in the first rodless chamber (or the second rodless chamber) to realize buffering, and the energy saving effect is better.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

FIG. 2 is a schematic diagram of the enlarged structure at A in FIG. 1 .

In Figure 1 and Figure 2:

1. Connecting seat; 2. Front end cover; 3. The first cylinder; 4. The first piston; 41. The first flow channel hole; 42. The first one-way gasket; 43. The first crash pad; 5. The first A piston rod; 6, the first clearance hole; 7, the first exhaust hole; 8, the rear end cover; 9, the second cylinder barrel; 10, the second piston; 101, the second flow channel hole; 102, the second One-way gasket; 103, the second crash pad; 11, the second piston rod; 12, the second vent hole; 131, the first sealing ring; 132, the first wear-resistant ring; 141, the second sealing ring; 142. The second wear ring.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

A door-closing buffer cylinder as shown in Figure 1 and Figure 2, includes a connecting seat 1 and a front end cover 2, the connecting seat 1 and the front end cover 2 are connected through the first cylinder 3, and the first cylinder 3 is movablely provided with a second cylinder A piston 4, the first piston 4 is provided with a first piston rod 5, the free end of the first piston rod 5 passes through the front end cover 2 and extends out of the first cylinder 3, the connecting seat 1, the first cylinder 3 and the first piston 4, a first rodless chamber is formed, a first rodless chamber is formed between the front end cover 2, the first cylinder 3 and the first piston 4, and the connecting seat 1 is provided with the first rodless chamber. The first clearance hole 6 connected with the rod cavity, the front end cover 2 is provided with the first exhaust hole 7 connected with the first rod cavity, and the first piston 4 is provided with a hole for communicating with the first rodless cavity and the first rod cavity. The first flow channel hole 41 of the rod cavity, the rear end of the first piston 4 is embedded with the first one-way sealing gasket 42 matching the first flow channel hole 41, the front end surface of the first one-way sealing gasket 42 is set as a tapered surface, The rear end surface of the first one-way gasket 42 is set as a plane.

The above description applies to single door construction. Its working principle is as follows: the free end of the first piston rod 5 is installed on the door, when the door control unit issues a door closing command, the first piston rod 5 is retracted under the drive of the automatic door, and the volume of the first rodless cavity is reduced, due to The front end surface of the first one-way sealing gasket 42 is set as a tapered surface, while the rear end surface is set as a plane, so that the passage between the first rod chamber and the first rodless chamber is closed during the retraction process of the first piston rod 5 , the air inside the first rodless chamber will not enter the first rodless chamber, at this time the compressed air in the first rodless chamber is discharged through the first gap 6, thereby realizing the buffering and deceleration of the automatic door; when the door When the control unit issues a door-opening command, the first piston rod 5 stretches out. At this time, under the action of the first one-way gasket 42, a conduction state will be formed between the first rod chamber and the first rodless chamber. At this time Part of the air in the first rod chamber is discharged through the first exhaust port, and the other part flows into the first rodless chamber through the first flow channel hole 41, thereby not only ensuring the normal opening of the automatic door, but also effectively controlling the first The air in the rodless cavity is compensated.

As a preferred embodiment, when the utility model is applied to a double-door structure, the utility model also includes a rear end cover 8, the connecting seat 1 and the rear end cover 8 are connected through a second cylinder 9, and the second cylinder 9 The second piston 10 is movable inside, and the second piston 10 is provided with a second piston rod 11. The free end of the second piston rod 11 passes through the rear end cover 8 and extends out of the second cylinder 9. The connecting seat 1 , A second rodless chamber is formed between the second cylinder 9 and the second piston 10, a second rod chamber is formed between the rear end cover 8, the second cylinder 9 and the second piston 10, and the connecting seat 1 A second gap (not shown) that communicates with the second rodless chamber is provided, and the rear end cover 8 is provided with a second exhaust hole 12 that communicates with the second rod chamber, and the second piston 10 A second flow channel hole 101 is provided to communicate with the second rodless cavity and the second rod cavity, and the front end of the second piston 10 is embedded with a second one-way sealing gasket 102 matching with the second flow channel hole 101. The front end surfaces of the two one-way sealing gaskets 102 are set as planes, and the rear end surfaces of the second one-way sealing gaskets 102 are set as conical surfaces. The working principle in the double-door state is the same as that in the single-door state, so it will not be repeated here.

In summary, the utility model is provided with a gap hole on the connecting seat 1, specifically, the diameter of the first gap hole 6 (or the second gap hole) is about 0.15mm, and when the piston rod is retracted, the rodless The air in the cavity is discharged through the corresponding gaps. Specifically, the moving speed of the first piston rod 5 (or the second piston rod 11) is about 10mm/s during this process, so as to effectively play the role of deceleration and buffering. Compared with the prior art, the utility model has simple structure, better buffering effect, and longer service life. At the same time, the utility model does not need to install sensors, thereby reducing the design difficulty of the electronic control unit, convenient control, and low cost of use. , with a wider range of application. In addition, the utility model does not need to be inflated when working, and only needs the air in the first rodless chamber (or the second rodless chamber) to realize buffering, and the energy saving effect is better.

In order to improve the sealing performance of the present utility model, a first sealing ring 131 and a first wear-resistant ring 132 are respectively embedded between the first piston 4 and the first cylinder 3, and the second piston 10 and the second cylinder 9 are respectively embedded. A second sealing ring 141 and a second wear ring 142 are provided.

In order to avoid that the first piston rod 5 (or the second piston rod 11) is stretching out, the first piston 4 (or the second piston 10) directly collides with the front end cover 2 (or the rear end cover 8), the first piston 4 The front end of the piston 10 is provided with a first crash pad 43 matched with the front end cover 2 , and the rear end of the second piston 10 is provided with a second crash pad 103 matched with the rear end cover 8 .

The above is only a preferred embodiment of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope are all included in the utility model patent application scope .

Claims (4)

1. a bounce cylinder of closing the door, it is characterized in that: comprise Connection Block and drive end bearing bracket, described Connection Block is connected by the first cylinder barrel with described drive end bearing bracket, first piston is movably set with in described first cylinder barrel, described first piston is provided with first piston bar, the free end of described first piston bar passes described drive end bearing bracket and stretches out in the outside of described first cylinder barrel, described Connection Block, the first rodless cavity is formed between described first cylinder barrel and described first piston, described drive end bearing bracket, the first rod chamber is formed between described first cylinder barrel and described first piston, described Connection Block is provided with the first lyriform pore be connected with described first rodless cavity, described drive end bearing bracket is provided with the first row pore be connected with described first rod chamber, described first piston is provided with the first flow hole being communicated with described first rodless cavity and described first rod chamber, the rear end of described first piston is embedded with the first one-way sealing packing coordinated with described first flow hole, the front end face of described first one-way sealing packing is set to the conical surface, the rear end face of described first one-way sealing packing is set to plane.

2. bounce cylinder of closing the door according to claim 1, it is characterized in that: also comprise rear end cap, described Connection Block is connected by the second cylinder barrel with described rear end cap, the second piston is movably set with in described second cylinder barrel, described second piston is provided with the second piston rod, the free end of described second piston rod passes described rear end cap and stretches out in the outside of described second cylinder barrel, described Connection Block, the second rodless cavity is formed between described second cylinder barrel and described second piston, described rear end cap, the second rod chamber is formed between described second cylinder barrel and described second piston, described Connection Block is provided with the second lyriform pore be connected with described second rodless cavity, described rear end cap is provided with the second row pore be connected with described second rod chamber, described second piston is provided with the second runner hole being communicated with described second rodless cavity and described second rod chamber, the front end of described second piston is embedded with the second one-way sealing packing coordinated with described second runner hole, the front end face of described second one-way sealing packing is set to plane, the rear end face of described second one-way sealing packing is set to the conical surface.

3. bounce cylinder of closing the door according to claim 2, it is characterized in that: between described first piston and described first cylinder barrel, be embedded with the first sealing ring and the first wear ring respectively, between described second piston and described second cylinder barrel, be embedded with the second sealing ring and the second wear ring respectively.

4. bounce cylinder of closing the door according to claim 3, is characterized in that: the front end of described first piston is provided with the first bumper matched with described drive end bearing bracket, and the rear end of described second piston is provided with the second bumper matched with described rear end cap.