KR101373893B1 - An air damper - Google Patents

Abstract

The air damper of the present invention includes a cylinder for storing the air compressed or expanded by the movement of the piston therein; A piston for changing the internal pressure of the cylinder by forcibly moving air in the cylinder while being drawn or inserted in the cylinder by an external load; An operating rod connected to the distal end of the piston to transmit external load to the piston; A sealing cap that seals the rear end of the cylinder and prevents air from leaking out of the cylinder; A tubular seal pad coupled to an outer circumference of the piston to control air movement inside the cylinder; A valve coupled to the rear end of the piston to move air in a gap while being in contact with or separated from the seal pad by the presence or absence of an external load; A rod seal coupled to the distal end of the cylinder to prevent a gap between the operating rod and the cylinder, thereby preventing air inside the cylinder from leaking to the outside and air from outside the cylinder; A joint assembled to a distal end of the actuating rod; And a spring installed between the inner end of the piston and the front end of the valve, the spring allowing the air to move away from the seal pad after external load absorption.
The piston is provided with an actuating rod fastening portion at the tip, a seal pad support step in the center of the outer periphery, a first air entry hole in the front periphery of the seal pad support, and a pair of seals in the rear periphery of the seal pad support step. The pad control protrusion is provided, and the second air access hole is provided on the outer circumference between the pair of seal pad control protrusions.
Therefore, the sealing function is good at high temperature, normal temperature, and low temperature, and the damping performance difference is small, so that the sealing function can be used in a wide range of temperature.

Description

Air Damper {AN AIR DAMPER}

The present invention relates to an air damper, and more particularly, to realize a sealing effect and a damping effect even under a wide range of temperature conditions, and to block the inflow of cold air into the inside to eliminate the occurrence of internal condensation so that the damping effect can be realized. It's about one thing.

In general, the air damper mainly used for the cover opening and closing device such as the glove box of the vehicle plays a role of damping the external load through the interaction of the piston.

Conventionally, the air damper has a gap generated by shrinkage deformation of the SEAL member under low temperature conditions (refrigeration and freezing: -25 ° C to 4 ° C), and a damping structure due to a decrease in sealing effect. There was a problem that can not implement the function as.

In addition, the conventional piston type air damper has a problem in that the manufacturing cost increases due to the injection of oil due to the adoption of the sealing structure using the oil, and thus the price competitiveness is lowered, in anticipation of dew condensation due to inflow of cool air into the cylinder.

1. Patent Publication No. 10-0141856 2. Patent Publication No. 10-0324925 3. Patent Registration No. 10-0716591

The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide an air damper capable of implementing a damping function at a wider temperature condition.

Another object of the present invention is to provide an air damper that can be used in a wide temperature range by reducing the performance difference at high temperature, room temperature, and low temperature by using a damping factor having excellent temperature characteristics.

It is another object of the present invention to provide an air damper that can reduce manufacturing cost by eliminating additional damping factor costs such as oil and ensure price competitiveness.

Air damper of the present invention for achieving the above object is a cylinder for storing the air compressed or expanded by the movement of the piston therein; A piston for changing the internal pressure of the cylinder by forcibly moving air in the cylinder while being drawn or inserted in the cylinder by an external load; An operating rod connected to the distal end of the piston to transmit external load to the piston; A sealing cap that seals the rear end of the cylinder and prevents air from leaking out of the cylinder; A tubular seal pad coupled to an outer circumference of the piston to control air movement inside the cylinder; A valve coupled to the rear end of the piston to move air in a gap while being in contact with or separated from the seal pad by the presence or absence of an external load; A rod seal coupled to the distal end of the cylinder to prevent a gap between the operating rod and the cylinder, thereby preventing air inside the cylinder from leaking to the outside and air from outside the cylinder; A joint assembled to a distal end of the actuating rod; And a spring installed between the inner end of the piston and the front end of the valve, the spring allowing the air to move away from the seal pad after external load absorption.
The piston is provided with an actuating rod fastening portion at the tip, a seal pad support step in the center of the outer periphery, a first air entry hole in the front periphery of the seal pad support, and a pair of seals in the rear periphery of the seal pad support step. The pad control protrusion is provided, and the second air access hole is provided on the outer circumference between the pair of seal pad control protrusions.

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In the air damper of the present invention, the operating rod fastening portion of the piston is provided with an opening on one side, the elastic engaging jaw is provided on both sides of the opening is the operating rod is elastically coupled.

In the air damper of the present invention, the seal pad has a cylinder contact protrusion corresponding to the seal pad control protrusion at the rear of the outer circumference thereof, and an air entry hole is formed at the rear end face.

The valve is provided with a connecting rod inserted into the piston at the front end, a valve plate for opening and closing the air inlet hole of the seal pad is provided at the rear end, and an elastic catching part for stable coupling with the piston is provided at the front end of the connecting rod. do.

The airtight cap of the air damper of the present invention is provided with a sealing ring for shock relief and sealing on the outer circumference.

The air damper of the present invention has a good sealing function under high temperature, room temperature, and low temperature conditions, and can be used in a wide range of temperature ranges due to a small difference in damping performance.

For example, the usable temperature range can be used in a wide range from -25 ° C to 30 ° C.

In addition, the air damper of the present invention can be reduced in the outer diameter of the cylinder can be mounted in a narrow space such as the rail (RAIL) to implement a damping function, the one-way (ONE WAY) function in the opposite direction of the damping direction It can be operated with minimum load when operating.

Since the air damper of the present invention does not use a separate damping factor such as oil, it is possible to reduce manufacturing costs and secure price competitiveness.

1A is a partially cutaway perspective view of a working rod receiving state of one embodiment of the present invention;
1B is a partially cutaway perspective view of the working rod pulled out state of the embodiment
2 is a partially exploded perspective view of the embodiment;
3 is an exploded perspective view of main parts of the embodiment;
4 is a perspective view of a piston of the embodiment
5 is a longitudinal sectional view showing main parts of the embodiment;
6 is a longitudinal sectional view of the actuating rod pull-out state of the embodiment;
7A to 7C are principal part longitudinal sectional views showing an operating state in which the external load is applied toward the inside of the cylinder of the embodiment;
8 is a longitudinal cross-sectional view of the operating rod receiving state of the embodiment;
9A and 9B are principal part longitudinal sectional views which show the operation state of the state which the external load was applied toward the outer side of the cylinder of this embodiment.
10 is a longitudinal sectional view of the rod seal portion of the embodiment;
11 is a longitudinal sectional view of the seal pad and the valve portion of the embodiment;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1A shows a partially cutaway perspective view of an actuating rod receiving state of one embodiment of the present invention, FIG. 1B shows a partially cutaway perspective view of an actuating rod pulled out state of the embodiment, and FIG. 2 shows a partial cutaway disassembly of the embodiment. A perspective view is shown.

3 shows an exploded perspective view of the main part of the embodiment, FIG. 4 shows a perspective view of the piston of the embodiment, and FIG. 5 shows a longitudinal sectional view of the main part of the embodiment.

As shown in Figure 1a to 5 the air damper 100 of the present invention

A cylinder (110) for storing therein air that is compressed or expanded by the movement of the piston (120);

A piston (120) for changing the internal pressure of the cylinder (110) by forcibly moving air in the cylinder (110) while being drawn or inserted in the cylinder (110) by an external load;

An operating rod (130) connected to the distal end of the piston (120) to transmit an external load to the piston (120);

A sealing cap 140 that seals the rear end of the cylinder 110 and prevents the air inside the cylinder 110 from escaping to the outside;

A tubular seal pad 150 coupled to an outer circumference of the piston 120 to control air movement in the cylinder 110;

A valve 160 coupled to the rear end of the piston 120 to move air in a gap while being in contact with or separated from the seal pad 150 by the presence or absence of an external load;

It is coupled to the front end of the cylinder 110 to eliminate the gap between the operating rod 130 and the cylinder 110, the air inside the cylinder 110 leaks to the outside and the air outside the cylinder 110 inside the cylinder 110 A rod seal 170 for preventing the inflow into the container;

A joint 180 assembled to the front end of the operation rod 130;

A spring 190 installed between the inner end of the piston 120 and the front end of the valve 160, and allowing the movement of air by detaching the valve 160 from the seal pad 150 after absorbing the external load; Include.

In the air damper 100 of the present invention, the piston 120 is provided with an actuating rod fastening portion 121 at the tip, a seal pad support step 122 is provided at the center of the outer periphery, and a seal pad support step 122 at the front. The first air access hole 123 is provided on the outer circumference, and the plurality of seal pad control protrusions 124 are provided on the outer circumference of the seal pad support step 122 and the outer circumference between the plurality of seal pad control protrusions 124. The second air access hole 125 is provided.

In the illustrated embodiment, the operating rod fastening part 121 of the piston 120 has an opening 126 provided at one side thereof, and a locking jaw 127 is provided at both sides of the opening 126 so that the operating rod 130 is burnt. It is meant to be sexually united.

The seal pad 150 inserted into the outer circumferential rear portion of the piston 120 is provided with a cylinder contact protrusion 151 corresponding to the seal pad control protrusion 124 at the rear of the outer circumference, and has an air access hole at a rear end thereof. 152 is formed.

The valve 160 is provided with a connecting rod 161 inserted into the piston 120 at the front end thereof, and a valve plate 162 opening and closing the air inlet hole 152 of the seal pad 150 at the rear end thereof. The elastic support 163 for stable connection with the piston 120 is provided at the tip of the connecting rod 161.

Sealing cap 140 for sealing the rear end of the cylinder 110 is provided with a sealing ring 141 for shock relief and sealing on the outer circumference.

Fig. 6 is a longitudinal sectional view of the working rod pulled-out state of the same embodiment, and Figs. 7A to 7C are main longitudinal sectional views showing the operating state of the external load applied to the inside of the cylinder of the embodiment.

In the air damper 100 of the present invention, as shown in FIG. 6, the operating rod 130 is drawn out of the cylinder 110 to the inside of the cylinder 110 in the operating rod 130 as shown in FIGS. 6 and 7A. When the external load (F) is applied to the piston 120, the seal pad 150 with the operation rod 130 is moved in the rear end direction of the cylinder 110, the cylinder 110 of the inner rear space (B) As the air is compressed, the valve 160 is pushed in the opposite direction, so that the valve 160 is in close contact with the seal pad 150 as shown in FIG. 7B.

In the process of moving the piston 120, when the piston 120 is in contact with the tip of the seal pad 150, the seal pad 150 is moved with the piston 120, in this case, the seal pad control protrusion ( 124, the cylinder contact protrusion 151 of the seal pad 150 is positioned in a straight line.

In the state where the rear end of the seal pad 150 moved together with the piston 120 is in close contact with the valve 160 as shown in FIG. 7B, the valve plate 162 seals the air inlet hole 152 of the seal pad 150. Therefore, the damping effect of absorbing an external load is prevented by preventing air movement in the rear space B inside the cylinder, and the seal pad control protrusion 124 of the piston 120 and the cylinder contact protrusion 151 of the seal pad 150 are Since it is located in a straight line it is possible to stably maintain the damping force even if the seal pad 150 is contracted by the temperature decrease.

On the other hand, after absorbing the initial external load (F), if the external load (F) disappears, the seal pad 150 and the valve (with the elastic force of the spring 190 installed between the inner end of the piston 120 and the end of the valve 160) The gap between the gaps 160 creates a gap as shown in FIG. 7C, and the air inlet hole 152 of the seal pad 150 opens, through which the air in the rear space B of the cylinder 110 flows into the cylinder 110. Since the movable front 130 and the piston 120, the seal pad 150 can be moved to the inner rear end of the cylinder 110 without any resistance.

Fig. 8 is a longitudinal sectional view of a working rod receiving state of the same embodiment, and Figs. 9A and 9B are principal longitudinal sectional views showing an operating state of an external load applied to the outside of the cylinder of the embodiment.

8 and 9a, when the external load F ′ is applied in the direction in which the operating rod 130 is drawn out in the cylinder 110 and withdraws the operating rod 130, the operating rod 130 and the piston After the 120 is moved outwardly of the cylinder 110 to be in contact with the seal pad 150, the actuating rod 130, the piston 120, and the seal pad 150 are simultaneously moved, and the spring 190 As a result, the valve 160 is pushed out to generate a gap, as shown in FIG. 9B, through which the air is internally rearward space B of the cylinder 110 under negative pressure from the interior front space A of the cylinder 100. Will be moved to).

In this case, the air passage inside the piston 120 is wide, so that a large amount of air moves, so that the operating rod 130 and the piston 120 can be drawn out with a small resistance.

When the piston 120 and the seal pad 150 move together, the seal pad control protrusion 124 is the cylinder contact protrusion 151 of the seal pad 150 until the valve 160 is pushed by the spring 190. Since the () is located in a straight line it is possible to stably maintain the airtight between the seal pad 150 and the cylinder 110 even if the seal pad 150 is contracted by the temperature decrease.

Fig. 10 shows a longitudinal cross-sectional view of the rod seal portion of the embodiment, and Fig. 11 shows a longitudinal cross-sectional view of the seal pad and the valve portion of the embodiment.

Meanwhile, in the air damper 100 of the present invention, the rod seal 170 installed at the upper end of the cylinder 110 to maintain the airtight between the operating rod 130 and the cylinder 110 is the cylinder 110 as shown in FIG. 10. The outside air of the to prevent the inflow of the inside of the cylinder 110 by blocking the inflow into the interior of the cylinder 110, the external load (F) toward the interior of the cylinder 110 to the working rod 130 When this is applied to absorb the load applied in the perpendicular direction of the operating rod 130 to minimize the load transmitted to the cylinder (110).

In the air damper 100 of the present invention, the tubular seal pad 150 is formed between the inner diameter of the cylinder 110 and the seal pad 150 and the outer diameter of the piston 120 when the piston 120 is inserted as shown in FIG. 11. By generating a compression resistance to implement the damping effect, it is possible to implement the damping effect in a low temperature state.

The seal pad 150 is moved when the piston 120 is pulled out to reduce the compression resistance. At this time, air is moved to the air passage inside the piston 120 to minimize the frictional resistance.

In addition, in the air damper 100 of the present invention, the tubular seal pad 150 has a seal pad control protrusion 124 of the piston 120 and a cylinder of the seal pad 150 when the piston 120 is inserted as shown in FIG. 11. The contact protrusion 151 is positioned in a straight line to increase sealing performance and damping effect, and the seal pad control protrusion 124 and the seal pad 150 of the piston 120 when the piston 120 is pulled out. The frictional resistance of the cylinder is reduced to a structure in which the cylinder contact protrusion 151 is not positioned in a straight line.

The air damper 100 of the present invention has a good sealing function under high temperature, room temperature, and low temperature conditions, and is capable of being used in a wide range of temperature due to a small difference in damping performance.

In addition, as the piston 120 moves, the seal pad control protrusion 124 of the piston 120 is in contact with the cylinder contact protrusion 151 of the seal pad 150. ), Even if it contracts, it is possible to stably maintain the damping force.

For example, the usable temperature range can be used in a wide range from -25 ° C to 30 ° C.

In addition, since the outer diameter of the cylinder 110 can be reduced, the damping function can be implemented by mounting in a narrow space such as a rail part, and when operating in the opposite direction of the damping direction with the one-way function. It can be operated with minimum load.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. .

100: air damper
110: cylinder
120: piston
121: operating rod fastening portion
122: seal pad support step
123: first air access hole
124: thread pad control projection
125: second air access hole
126:
127: jamming jaw
130: working rod
140: sealing cap
141: sealing ring
150: seal pad
151: cylinder contact protrusion
152: air access hole
160: valve
161: connection rod
162: valve plate
163: elastic support
170: load seal
180: joint
190: spring

Claims (6)

A cylinder (110) for storing therein air that is compressed or expanded by the movement of the piston (120);
A piston (120) for changing the internal pressure of the cylinder (110) by forcibly moving air in the cylinder (110) while being drawn or inserted in the cylinder (110) by an external load;
An operating rod (130) connected to the distal end of the piston (120) to transmit an external load to the piston (120);
A sealing cap 140 that seals the rear end of the cylinder 110 and prevents the air inside the cylinder 110 from escaping to the outside;
A tubular seal pad 150 coupled to an outer circumference of the piston 120 to control air movement in the cylinder 110;
A valve 160 coupled to the rear end of the piston 120 to move air in a gap while being in contact with or separated from the seal pad 150 by the presence or absence of an external load;
It is coupled to the front end of the cylinder 110 to eliminate the gap between the operating rod 130 and the cylinder 110, the air inside the cylinder 110 leaks to the outside and the air outside the cylinder 110 inside the cylinder 110 A rod seal 170 for preventing the inflow into the container;
A joint 180 assembled to the front end of the operation rod 130;
A spring 190 installed between the inner end of the piston 120 and the front end of the valve 160, and allowing the movement of air by detaching the valve 160 from the seal pad 150 after absorbing the external load; Including,
The piston 120 is provided with an actuating rod fastening portion 121 at a distal end, a seal pad support step 122 at the center of the outer periphery, and a first air access hole 123 at the outer periphery of the seal pad support step 122. ),
A plurality of seal pad control protrusions 124 are provided on the outer circumference of the seal pad support step 122 and a second air access hole 125 is provided on the outer circumference of the plurality of seal pad control protrusions 124. Become,
The seal pad 150 is provided with a cylinder contact protrusion 151 corresponding to the seal pad control protrusion 123 at an outer circumference thereof, and has an air access hole 152 formed at a rear end thereof. Damper.
delete The method of claim 1, wherein the operating rod fastening portion 121 of the piston 120 is provided with an opening 126 on one side, the locking jaw 127 is provided on both sides of the opening 126, the operating rod 130 is burnt Air damper, characterized in that coupled to the sexual.
2. The valve plate 162 of claim 1, wherein the valve 160 has a connecting rod 161 inserted into the piston 120 at the front end thereof, and opens and closes an air access hole of the seal pad 150 at the rear end thereof. Air damper, characterized in that provided.
The air damper according to claim 4, wherein an elastic support part (163) for stably coupling with the piston (120) is provided at the tip of the connection rod (161).
The air damper according to claim 1, wherein the sealing cap (140) is provided with a sealing ring (141) for shock relief and sealing on an outer circumference.

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