KR100494060B1 - Air pressure maintaining device of tire - Google Patents

Abstract

Disclosed is a tire air pressure maintaining device which is installed at an air inlet of a tire and maintains the air pressure inside the tire at a constant pressure at all times to prevent comfortable driving and safety accidents for the user. The tire air pressure maintaining device according to the present invention includes a piston portion and a housing portion. The piston unit is mounted on the inner circumferential surface of the rim to guide air to the tire side mounted on the outer circumferential surface of the rim, and is integrally formed at the lower part of the first piston and the first piston, which is built in an air inlet formed with a male screw on the outer circumferential surface to guide the air. A second piston for guiding air guided by the first piston to the inside of the tire while penetrating the rim, and an elastic piece having one end mounted on the lower end of the second piston extending into the tire and the other end being in close contact with the inner circumferential surface of the tire; It is provided. On the other hand, the housing portion is mounted to the air inlet so as to define the first piston in the air inlet, and a case forming an air chamber between the upper surface of the first piston, and a first elastic spring embedded in the case to return the first piston And an on / off valve mounted through the case and guiding the outside air to the air chamber by the pressure difference in the case.

Description

Air pressure maintaining device of tire

The present invention relates to an air pressure maintaining device of a tire, and more particularly, a tire air pressure installed at an air inlet of a tire to maintain a constant air pressure in a tire at a constant pressure at all times to prevent comfortable driving and safety accidents for a user. It relates to a holding device.

In general, the holding ratio of automobiles, motorcycles and bicycles is high, and the products all use tires to cushion the road surface by putting air pressure on the wheels. At this time, the air inlet is mounted on the tire side to inject air pressure into the tire.

By the way, even if the tire does not have any abnormality, if left untired, the air naturally penetrates the rubber so that the air pressure decreases by a small amount, or the air pressure decreases remarkably due to a trauma such as friction with irregular ground during driving. In this way, when the air pressure in the tire is lowered, the safety of the user is followed, causing a safety accident.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to be installed in the air inlet of the tire to maintain a constant pressure of the air pressure inside the tire at all times to provide a comfortable driving and safety accident to the user in advance. It is to provide a tire pressure maintaining device that can be prevented.

In order to achieve the object of the present invention as described above, the present invention,

A first piston which is mounted on the inner circumferential surface of the rim to guide the air to the tire side mounted on the outer circumferential surface of the rim, and which is built in an air inlet formed with a male screw on the outer circumferential surface to guide the air, and integrally formed at the lower part of the first piston A second piston for guiding the air guided by the first piston into the tire while passing through the first piston, and an elastic piece having one end mounted on the lower end of the second piston extending into the tire and the other end being in close contact with the inner circumferential surface of the tire. Piston part; And

A case mounted to the air inlet to define the first piston in the air inlet and forming an air chamber between the upper surfaces of the first piston, a first elastic spring embedded in the case to return the first piston, and the case Provided is a tire air pressure maintaining device consisting of a housing portion which is mounted to penetrate through and has an opening and closing valve for guiding the outside air to the air chamber side by the pressure difference inside the case.

As described above, according to the present invention, it is mounted to the air inlet of the tire to maintain the air pressure inside the tire at a constant pressure at all times to prevent the user from comfortable running and safety accidents.

Hereinafter, with reference to the accompanying drawings will be described a tire air pressure maintaining apparatus according to an embodiment of the present invention.

1 is an exploded perspective view showing a tire pressure maintaining device according to the present invention, FIG. 2 is a perspective view showing a coupled state of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 2.

1 and 2, the tire air pressure maintaining apparatus 100 according to the present invention is mounted on the inner circumferential surface of the rim 30 to direct air toward the tire 10 mounted on the outer circumferential surface of the rim 30. The piston part 110 which guides and which is built into the air inlet 20 and the air inlet 20 in which the external thread 22 was formed on the outer peripheral surface, and the piston part 110 to the air inlet 20 is limited. The housing part 130 which forms the air chamber S between them is provided.

First, the piston 110 is integrally formed at the lower portion of the first piston 112 and the first piston 112 disposed inside the air inlet 20, and the second piston 116 penetrating the rim 30. ) And an elastic piece 124 mounted to the lower portion of the second piston 116.

The first piston 112 has a cylindrical shape to reciprocate in the air inlet 20. The upper portion of the first piston 112 is mounted to be exposed to the outside of the air inlet 20, a plurality of O-rings 114 on the circumferential surface of the first piston 112 exposed to the outside of the air inlet 20 Is fitted. In addition, on the upper surface of the first piston 112, a first guide hole 118a extending to the lower surface of the first piston 112 is formed vertically.

The second piston 116 extends with a diameter smaller than the diameter of the first piston 112 at the bottom of the first piston 112. In the second piston 116 formed as described above, a second guide hole 118b communicating with the first guide hole 118a is vertically formed to a lower adjacent position of the second piston 116, and the second guide hole 118b. ), A third guide hole 120 communicating with the second guide hole 118b is formed through the circumferential surface of the second piston 116. At this time, the inner air of the tire 10 is the third guide hole 120, the second guide hole 118b and the first guide hole on the circumferential surface of the second piston 116, the third guide hole 120 is formed ( A backflow prevention ring 122 is fitted to selectively close the third guide hole 120 to prevent backflow to the side of 118a.

On the other hand, one end of the elastic piece 124 is fixed to the lower portion of the second piston 116 and the other end is in close contact with the inner circumferential surface of the tire 10 (see Fig. 3). At this time, the elastic piece 124 extends away from the lower side of the second piston 116 from the lower portion of the second piston 116. The piston part 110 formed as described above is defined in the air inlet 20 by the housing part 130.

The housing 130 includes a case 132 and a case 132 which form an air chamber S between the upper surfaces of the first piston 112 while defining the first piston 112 in the air inlet 20. And a first elastic spring 138 embedded therein and an opening / closing valve 142 mounted through the case 132 and guiding external air to the inside of the case 132.

The case 132 is formed with a guide groove 134 for providing an air chamber S between the upper portions of the first piston 112 while guiding the first piston 112 therein, and a lower portion of the guide groove 134. In the mounting groove 136 is coupled to the outer peripheral surface of the air inlet 20 is formed. In this case, a first elastic spring 138 is disposed inside the guide groove 134 to return the first piston 112 to rise, and a vent hole penetrating the case 132 is formed at the center of the guide groove 134. 140 is formed. Preferably, a female screw 144 corresponding to the male screw 22 is formed on the inner circumferential surface of the mounting groove 136.

On the other hand, the opening and closing valve 142 is provided with a packing 146 to selectively open and close the vent 140 in the guide groove 134, one end is extended to the inside of the vent 140, the packing 146 It is mounted on the other end is provided with a support 150, the separation prevention plate 148 is formed. At this time, the second elastic spring 152 is disposed on the release preventing plate 148 and the upper surface of the case 132 so that the packing 146 can open and close the vent hole 140 smoothly.

Hereinafter, the coupling state of the tire air pressure maintaining apparatus 100 formed as described above will be briefly described.

First, the second piston 116 and the first piston 112 in which the elastic piece 124 is mounted are inserted into the air inlet 20. At this time, a portion of the second piston 116 equipped with the elastic piece 124 and the backflow prevention ring 122 is coupled through the rim 30, and the other end of the elastic piece 124 is coupled to the tire 10. To be in close contact with the inner peripheral surface. That is, a portion of the second guide hole 118b and the third guide hole 120 are disposed in the tire 10 through the rim 30, and the upper portion of the first piston 112 is air inlet 20. It is mounted to be exposed to the outside of).

When the piston unit 110 is coupled to the air inlet 20 as described above, the piston unit 110 is defined in the air inlet 20 using the housing 130. In order to define the piston unit 110 as described above, first, the on-off valve 142 is mounted on the case 132. In order to mount the on-off valve 142 as described above, the packing 146 is disposed inside the guide groove 134 and one end of the support 150 is mounted under the state in which the second elastic spring 152 is mounted on the support 150. Inserted into the vent 140 from the outside of the case 132 and combined with the packing 146. When the on-off valve 142 is mounted on the case 132 as described above, the female screw 144 formed in the mounting groove 136 under the state in which the first elastic spring 138 is built in the guide groove 134 is introduced into the air inlet. To the male screw 22 of (20). When the case 132 and the air inlet 20 are fastened to each other, the inner circumferential surface of the guide groove 134 and the first piston 112 are sealed by the O-ring 114 and the guide groove 134 and the first piston ( 112 is provided between the air chamber (S).

The operation state of the tire pneumatic pressure retention device 100 mounted as described above will be briefly described. When a part of the tire 10 adjacent to the air inlet 20 is in close contact with the ground by the load of the rider, the tire 10 Will have a crushed shape. At this time, the partially crushed tire 10 pushes the elastic piece 124 upward, and as a result, the second piston 116 and the first piston 112 are transferred upward. At this time, the outside air filled in the air chamber S between the upper portion of the first piston 112 and the guide groove 134 in the case 132 is provided to the first piston 112 and the second piston 116 to rise. The air is introduced along the first guide hole 118a, the second guide hole 118b and the third guide hole 120, and the air guided along the third guide hole 120 pushes the backflow prevention ring 122. It flows into the tire 10 inside (refer FIG. 4A).

As described above, the air remaining between the upper portion of the first piston 112 and the guide groove 134 in the case 132 is the first guide hole 118a, the second guide hole 118b and the third guide hole. When guided along the 120 to the inside of the tire 10, the support 150 and the packing 146 are transferred downward by the pressure difference inside the case 132 due to the reciprocating motion of the piston 110 (FIG. 4B). Reference). At this time, the outside air is filled in the air chamber (S) to the inside of the guide groove 134 along the vent hole 140, the packing 146 by the second elastic spring 152 again closes the vent hole 140 do. By such continuous operation, it is possible to maintain a constant air pressure inside the tire 10 at all times.

As described above, the tire air pressure maintaining apparatus 100 according to the present invention passes through the rim 30 in which the air inlet 20 is formed, and the first guide hole 118a and the second guide hole 118b, The piston unit 110 including the first piston 112 and the second piston 116 having the three guide holes 120 and the piston unit 110 is provided to guide the outside air while limiting the piston unit 110 to the air inlet 20. By providing the housing portion 130, by maintaining the air pressure in the tire 10 at a constant pressure at all times by the piston unit 110 disposed in the air inlet 20 to prevent comfortable driving and safety accidents for the user in advance. There is an advantage to this.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims You will understand.

1 is a perspective view showing an exploded tire pressure maintaining device according to the present invention,

FIG. 2 is a perspective view illustrating a coupling state of FIG. 1;

3 is a cross-sectional view taken along line A-A of FIG. 2, and

4a and 4b is a view showing an operating state of the tire pressure maintaining device according to the present invention.

Explanation of symbols on the main parts of the drawing

100: tire air pressure maintaining device 110: piston

112: first piston 116: second piston

124: elastic piece 130: housing portion

132: case 134: guide groove

136: dent home 140: vent

142: on-off valve 146: packing

150: support

Claims (5)

A first piston mounted on an inner circumferential surface of the rim to guide air to a tire side mounted on an outer circumferential surface of the rim, and integrated in an air inlet formed with a male screw on the outer circumferential surface to guide air; And a second piston for guiding air guided by the first piston into the tire while penetrating the rim, and an end of the second piston extending into the tire, and the other end of which is the inner circumferential surface of the tire. A piston having an elastic piece in close contact therewith; And A case mounted to the air inlet to define the first piston in the air inlet and forming an air chamber between an upper surface of the first piston, and a case built in the case to return the first piston 1. A tire pneumatic pressure holding device, comprising: a housing portion having an elastic spring and an opening and closing valve mounted through the case and guiding external air to the air chamber by a pressure difference inside the case. According to claim 1, wherein the first piston has a cylindrical shape to reciprocate in the air inlet, the upper portion of the first piston is exposed to the outside of the air inlet, the outside of the air inlet A plurality of O-rings are fitted on the circumferential surface of the first piston, and the first piston has a first guide hole extending vertically from the top to the bottom of the first piston to guide air to the second piston. The second piston has a diameter smaller than the diameter of the first piston and extends, and a second guide hole communicating with the first guide hole extends to a lower adjacent position of the second piston at the upper portion of the second guide hole. The tie portion is characterized in that the third guide hole is formed through the circumferential surface of the second piston to communicate with the second guide hole Air-pressure-holding device. The counter flow of claim 2, wherein air on the tire is prevented from flowing back to the third guide hole, the second guide hole, and the first guide hole on the outer circumferential surface of the second piston in which the third guide hole is formed. Tire pressure maintaining device, characterized in that the prevention ring is fitted. According to claim 1, The case guides the first piston therein while forming the air chamber between the upper portion of the first piston and the guide groove in which the first elastic spring is formed is formed, the guide Tires, characterized in that the bottom of the groove is provided with a mounting groove formed with a female thread on the male screw on the inner peripheral surface so that the case can be mounted to the air inlet, the guide groove is formed in the central portion of the guide groove through the case Pneumatic pressure retainer. The support valve of claim 4, wherein the opening / closing valve includes a packing for selectively opening and closing the ventilation hole in the guide groove, and one end of which is extended to the inside of the ventilation hole to be mounted to the packing and the other end is provided with a release preventing plate. And a second elastic spring is fitted to the support between the release preventing plate and the case so that the packing can smoothly open and close the vent hole.