JP2005231573A - Tire automatic pump device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire automatic pump device to be mounted for use on an existing wheel and automatically injecting air into the tire by running a vehicle such as a bicycle. <P>SOLUTION: This device is provided with an air pump device 2 fixed and mounted without hindering rotation of the wheel 17 between a rim 21 and a hub 23 of the wheel 17, a driving part 3 for driving the pump device 2, and a hose 4 for connecting a discharge port 38 of the pump device 2 and an air valve 25 of the tire. The driving part 3 is provided with a weight 41 provided to be fixed to a rotary shaft 31 arranged in substantially parallel to an axle 15. Every time the wheel 17 rotates once, the rotary shaft 31 is rotated once by a gravity action of the weight 41. By transmitting the rotary motion, the pump device 2 is driven. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic inflating device for tires of bicycles, motorcycles and other vehicles, and more particularly to an automatic inflating device for tires used by being mounted on wheels.

  Conventionally, for example, bicycle tires generally use a hand-operated or foot-operated air pump when injecting air. However, since these are inconvenient for carrying, a small type air pump that can be used by being detachably attached to a frame of a vehicle body has been developed. However, the small type air pump has a problem that requires labor and time because the amount of air discharged by one operation is small.

  In order to solve the above problems, a bicycle body frame vertical pipe is used as an air pump cylinder, a seat post with a saddle attached to the upper end is formed long, and a piston is provided at the lower end of the seat post to provide a piston type air. A pump configuration (hereinafter referred to as “conventional example”) has been developed (see, for example, Patent Documents 1 and 2).

  In the above conventional example, a discharge port provided in a cylinder and an air valve of a wheel tire are connected by a hose, a piston is moved up and down by operating a saddle, and compressed air is injected into the tire. Thereby, the problem mentioned above is eliminated. However, the conventional example has a problem that it is necessary to stop the bicycle when injecting air into the tire and to manually operate the saddle to inject air.

As another example, the development of a technology (hereinafter referred to as “preceding example”) in which a rotary air pump is mounted on a bicycle wheel hub and the air pump is driven by rotating the wheel is attempted. ing.
In the preceding example, the discharge port of the pump and the air valve of the tire are connected and used. When the bicycle is run, the pump is driven, so that air is always injected (supplemented) into the tire during running. Can do.
Therefore, according to the preceding example, the problems described above with respect to the conventional example are solved. However, since the preceding example is a wheel hub equipped with the air pump, there remains a problem in that it cannot be used by being mounted on an existing wheel.
Japanese Patent Laid-Open No. 08-324478 JP 2000-335471 A

  SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a tire auto-pneumatic device that can be used by being attached to an existing wheel and that can automatically inject air into a tire at all times during traveling by traveling a vehicle. It is intended.

  In order to achieve the above object, one of the present inventions (first invention) is a tire auto-pneumatic device used by being mounted on a wheel, which is mounted on the wheel without any trouble in rotation of the wheel, An air pump device that rotates integrally with a wheel, a drive unit that drives the pump device, and a hose that connects a discharge port of the pump device and an air valve of a tire, the drive unit rotating on the wheel A weight is provided that is fixed to a rotating shaft that is freely arranged and substantially parallel to the wheel axle. Each time the wheel rotates, the rotating shaft rotates once by the action of the weight. It is configured to drive the pump device by transmitting the rotational movement of the shaft.

  The present invention can be applied to a normal bicycle, a bicycle with an electric motor, a bicycle equipped with any other auxiliary device, a motorcycle, and other vehicles. In the present invention, the type and structure of the air pump device are not particularly limited, and examples include both a rotary type and a reciprocating type.

  According to the present invention, every time the wheel rotates once, the rotation shaft rotates once by the action (gravity) of the weight to drive the air pump device. When the air pump device is driven, compressed air discharged from the pump device is injected into the tire through a hose. Therefore, air is automatically injected into the tire at all times while the vehicle is running.

  Another invention of the present invention (second invention) is an automatic tire filling apparatus for a tire according to the first invention, wherein the air pump device is a rotary air pump, and the weight is a rotation of the pump. The rotary shaft is fixed to a shaft, and the rotary shaft is rotated once by the action of the weight each time the wheel rotates once, and the pump is driven by the rotational motion of the rotary shaft. . In the present invention, the type and structure of the rotary air pump are not particularly limited, and examples include air pumps such as vane pumps and turbo pumps, and compressors.

  Another invention of the present invention (third invention) is an automatic tire filling apparatus for a tire according to the first invention, wherein the air pump device is constituted by a reciprocating air pump, and the drive unit rotates on a wheel. A rotary shaft that is freely mounted and disposed substantially parallel to the wheel axle, a weight fixed to the rotary shaft, and a motion transmission mechanism that transmits the rotational motion of the rotary shaft to the pump. The rotating shaft is rotated once by the action of the weight each time the wheel rotates once, and the pump is driven by transmitting the rotational motion of the rotating shaft to the pump by the motion transmission mechanism. It is characterized by that. In the present invention, the type and structure of the reciprocating air pump is not particularly limited, and includes, for example, a piston pump, a plunger pump, or a diaphragm pump.

  In the present invention, a relief valve can be provided in an appropriate part of the air pump device. Moreover, the structure which provides the balancer with which a wheel is mounted | worn can also be employ | adopted. The same applies to the invention described later.

  Still another invention of the present invention (fourth invention) is a tire automatic inflating device used by being mounted on a wheel, and is mounted on the wheel without hindering the rotation of the wheel, and integrated with the wheel. A reciprocating air pump that rotates, a drive unit that drives the pump, and a hose that connects a discharge port of the pump and an air valve of the tire. The drive unit is disposed in correspondence with a weight that is rotatably attached to the hollow cylinder part of the hub of the wheel, and a reciprocating operation part of the pump, and is disposed on the hollow cylinder part. A push-motion body that is rotatable and fixed to the weight, and revolves around the outer periphery of the push-motion body as the wheel reciprocates as the wheel rotates. And configured to drive the pump And it features.

According to the fourth invention, when the wheel rotates, the pump circulates while reciprocating the reciprocating operation portion on the outer peripheral surface of the pushing body. And the body for pushing operation | movement maintains the substantially the same attitude | position also during rotation of a wheel by the gravity effect | action of a weight. Therefore, when the wheel rotates, the reciprocating body is pushed at a predetermined portion to drive the pump.
When the pump is driven, compressed air discharged from the pump is injected into the tire through a hose. Therefore, air is automatically injected into the tire at all times while the vehicle is running.

  In the fourth aspect of the invention, the push action body can be constituted by, for example, an eccentric ring or a cam. Further, as described above, a configuration in which a relief valve is provided in an appropriate part of the pump can be employed.

  According to the present invention, it can be used by attaching to an existing wheel without exchanging the wheel. Air can be automatically injected (supplemented) into the tire at all times while the vehicle is running.

  Hereinafter, an example of an embodiment of the present invention will be described.

  1 to 4 show an embodiment (Embodiment 1) of the present invention, and FIG. 1 shows an outline of the overall configuration in a state in which the tire automatic inflating device of the present invention is attached to a bicycle wheel. FIG. 2 is an enlarged side view showing a portion of the wheel to which the above-described air purifier is attached. FIG. 3 is an explanatory view showing an enlarged portion cut along the line AA in FIG. 4 is an operation explanatory diagram.

First, an outline of the configuration of the illustrated bicycle will be described. 1 to 4, the bicycle 1 includes a frame 11, a handle 12, a saddle 13, front and rear axles 14 and 15, front wheels 16 and rear wheels 17, a crank 18, a pedal 19, and a chain 20. Etc.
The rear wheel 17 includes a circular rim 21, a tire 22 mounted on the rim 21, a hub 23 disposed at the center of the rim 21 and rotatably mounted on an axle 15, and the hub 23. A plurality of linear spokes 24 a and 24 b that connect both ends and the rim 21, a tire air valve 25 attached to the rim 21, and the like are provided.

  The hub 23 includes a hollow cylindrical portion 26 that is rotatably mounted on the axle 15, and flange portions 27 a and 27 b provided on both end sides of the cylindrical portion 26. The spokes 24a and 24b are arranged alternately, the spoke 24a has one end attached to the rim 21 and the other end attached to the flange portion 27a, and the spoke 24b has one end attached to the rim 21 and the other end. Is attached to the flange portion 27b. Thereby, a space 28 is formed between the spokes 24a and 24b (see FIG. 3).

  Since the front wheel 16 has the same configuration as that of the rear wheel 17, the same components are denoted by the same reference numerals and description thereof is omitted.

The illustrated bicycle 1 is configured as described above, and rotates the crank 18 by stepping on the pedal, thereby rotating the rear wheel 17 via the chain 20 and traveling. The configuration of the bicycle 1 is the same as that of a known bicycle.
It should be noted that the bicycle 1 is disclosed as an example as an outline, and it is needless to say that a bicycle of an arbitrary type or configuration other than that illustrated can be adopted.

  Next, the automatic tire filling apparatus of the present invention will be described. The automatic tire filling apparatus according to the first embodiment is mounted between the rim 21 of the wheel (the rear wheel 17 in the figure, but the front wheel 16 is the same) and the hub 23 without hindrance to the rotation of the wheel. The air pump device 2 that rotates integrally with the wheels, the drive unit 3 that drives the air pump device 2, and the hose 4 that connects the discharge port 38 of the pump device 2 and the tire air valve 25 are provided. ing.

  The pump device 2 according to Embodiment 1 is composed of a rotary air pump 2A. As the pump 2A, for example, an air pump such as a vane pump or a turbo pump, a compressor, or the like can be employed.

The pump 2A is mounted between the hub 23 and the rim 21 without hindrance to the rotation of the wheel 17. The pump 2A of the first embodiment is formed in a size that can be accommodated in the space 28 between the spokes 24a and 24b.
The pump 2A is mounted by being fixed to an appropriate part of the wheel by an arbitrary means with the rotary shaft 31 of the pump being rotatable and arranged substantially parallel to the axle 15. The pump device 2 according to the first embodiment includes support members 34a and 34b that support the pump 2A by sandwiching both ends of the housing 32 of the pump 2A and fixing the pump 2A to the housing 32 via a connecting member 33. It has. Further, bearings 35 and 35 are provided at the tip portions of both support members 34a and 34b, and both ends of the rotary shaft 31 are rotatably supported by the both bearings 35.
Then, one support member 34a or 34b (34a in the drawing) is fixed to one spoke 24a or 24b (24a in the drawing) by a fixture 36 and a stopper 37 such as a bolt and a nut, and the other support member (in the drawing). 34b) is fixed to the other spoke (24b in the drawing) by a fixture 36 and a stopper 37 such as a bolt and a nut, and the pump 2A is mounted on the wheel.

  With the above configuration, when the wheel 17 rotates, the pump 2 </ b> A rotates integrally with the wheel while maintaining the rotary shaft 31 in a substantially parallel state with the wheel 15. That is, when the wheel 17 rotates once, the pump 2 </ b> A goes around the axle 15.

  The discharge port 38 of the pump device 2 is connected to the tire air valve 25 via the hose 4 and is configured to inject compressed (pressure) air discharged from the pump 2A into the tire 22 via the hose 4. .

The drive unit 3 according to the first embodiment includes weights fixed and opposed to the rotary shaft 31 at both ends of the rotary shaft 31 (between the support members 34a and 34b and both ends of the pump 2A in the drawing). 41, 41. Both the weights 41 are set to the same and appropriate weight.
As a result, when the wheel 17 rotates once, the pump 2A, the rotating shaft 31, and the weight 41 go around the axle 15, but the weight 41 always maintains a downward posture due to its weight (see FIG. 4). . Therefore, every time the wheel 17 makes one revolution, the rotary shaft 31 of the pump makes one revolution by the gravity action of the weight 41 to drive the pump 2A. When the pump 2 </ b> A is driven, compressed (pressure) air discharged from the pump 2 </ b> A is injected into the tire 22 through the hose 4. Accordingly, air is always automatically injected into the tire while the bicycle 1 is running. In FIG. 4, 9 indicates a circular orbit around which the rotary shaft 31 circulates.

In addition, by adjusting the weight of the weight 41, it can be set to prevent the supply of excessive pressure (air pressure) to the tire 22. This also applies to the embodiments described later.
In addition, a relief valve (not shown) may be provided in the vicinity of the discharge port 38 of the pump 2A to prevent supply of excessive pressure to the tire.

  In addition, the automatic inflator of Embodiment 1 includes a balancer 5 having a weight that balances the combined weight of the pump 2A, the weight 41, and the like. As shown in FIG. 2, the balancer 5 is fixedly attached to the spokes 24a, 24b, etc., on the opposite side of the axle 15 between the mounting portion of the unit such as the pump 2A and the weight 41.

In the above case, instead of the balancer 5, another unit such as the pump 2 </ b> A and the weight 41 can be mounted on the spokes 24 a and 24 b of the wheel 17 in the same manner as described above. When adopting this configuration, the other end of the hose having one end connected to the discharge port of the pump of the other unit is connected to the hose 4. If comprised in this way, since the rotating shaft 31 of both pumps makes one rotation and drives two pumps whenever the wheel 17 rotates once, injection | pouring of the air to the tire 22 is doubled.
The same applies to the embodiments described later, and the configuration in which the balancer 5 is provided and the balancer 5 can be replaced with another pump unit.

  In the first embodiment, the example in which the automatic tire inflation device is mounted on the rear wheel 17 of the bicycle 1 has been disclosed. This also applies to each embodiment described later.

  FIGS. 5 to 7 show another embodiment (Embodiment 2) of the present invention, and FIG. 5 is a front view showing an outline of a main part in a state where an automatic air purging device for a tire is attached to a wheel of a bicycle. FIG. 6 is an explanatory diagram viewed from the direction, FIG. 6 is an explanatory diagram showing an outline of the main part, cut along line BB in FIG. In the automatic tire filling apparatus of the second embodiment, the same reference numerals are given to members and the like that are the same as those already described in the first embodiment, and description thereof is omitted.

  The second embodiment is characterized in the configuration of the air pump device 6 and the drive unit 7 that drives the pump device.

  The air pump device 6 of the second embodiment is constituted by a reciprocating air pump. As the reciprocating type air pump, for example, a piston pump, a plunger pump, or a tire frame pump can be employed. In the second embodiment, an example in which the piston pump 6A is employed is disclosed.

The piston pump 6A includes a cylinder 51 having an appropriate diameter and length, a piston 52 slidably accommodated in the cylinder 51, a piston 52 having one end fixed to the piston 52 and the other end protruding from the cylinder 51. The rod 53, the discharge port 54 provided in the appropriate part of the bottom side (the upper end side in FIG. 5, FIG. 6) of the cylinder 51, and the relief valve 55 are provided.
The pump 6A is configured to discharge compressed (pressure) air from the discharge port by pushing the piston 52 to the bottom side by the rod 53. The pump 6A is provided on the bottom side in the cylinder 51, and includes a return spring 56 made of a coil spring or the like that biases the piston 52 toward the rod 53. As a result, the piston 52 (and the rod 53) is pressed in the direction of the distal end side (the lower end side in FIGS. 5 and 6) by the action of the spring and returned.
In this case, a circular flange or the like is formed at the protruding end of the rod 53, the return spring 56 is interposed between the flange and the cylinder 51, and the piston 52 and the rod 53 are provided. It is also possible to adopt a configuration for returning. Also in this configuration, the piston (and rod) can be returned in principle in the same manner as described above. This also applies to each embodiment described later.

The pump 6A is mounted between the hub 23 and the rim 21 so as not to interfere with the rotation of the wheel 17 and to rotate integrally with the wheel 17. The mounting means for mounting the pump 6A can adopt any configuration.
In the second embodiment, a mounting member 57 that is fixed to the bottom of the cylinder 51 and is formed in a semicircular shape that is substantially the same diameter as the outer diameter of the hollow cylindrical portion 26 of the bubb 23, and the outer side of the cylindrical portion 26. And a mounting member 58 formed in a semicircular shape having substantially the same diameter. On both side edges of the mounting members 57 and 58, flanges 59 and 60 projecting outward are formed.
Then, the hollow cylinder portion 26 is sandwiched between the both mounting members 57 and 58, and both the flange portions 59 and 60 are fixed with the stoppers 61 such as bolts and nuts, thereby fixing the pump 6A to the hollow cylinder portion 26. It is configured to be worn.

Further, in the pump 6A of the embodiment, on both sides of the cylinder 51, gaps 62 and 62 (see FIG. 5) in which weights 41 and 41 provided between the cylinder 51 and fixed to a rotation shaft described later can turn. ), And a support member 63a, 63b that supports and supports the pump 6A is provided by fixing an appropriate portion to the cylinder 51.
Then, one support member 63a is fixed to the one spoke 24a by a fixture 64 and a stopper (not shown) such as a bolt and nut, and the other support member 63b is fixed to the other spoke 24b. The pump 6A is mounted on the wheel 17 by being fixed by a stopper (not shown) such as a bolt and a nut.

With the above configuration, when the wheel 17 rotates, the pump 6 </ b> A also rotates integrally with the wheel 17. That is, when the wheel 17 makes one revolution, the pump 6A also makes one revolution (around the axle 15).
The mounting means of the pump 2A is disclosed as an example, and it is needless to say that the configuration can be changed to other configurations than the above.

  The driving unit 7 according to the second embodiment includes a rotating shaft 71 that is freely rotatable and is disposed so as to be substantially parallel to the axle 15 of the wheel 17, and a predetermined portion of the rotating shaft 71 (the gap portions 62 and 62 are connected to each other). The weights 41 and 41 having appropriate weights fixed to the corresponding part) and the motion transmission mechanism 72 for transmitting the rotational motion of the rotary shaft 71 to the rod 53 of the pump 6A are provided.

  In the second embodiment, a configuration is adopted in which bearings 65 and 65 are provided at the distal ends of the both supporting members 63a and 63b, and both ends of the rotating shaft 71 are rotatably supported by both bearings 65. Thereby, the rotating shaft 71 is provided so as to be rotatable and substantially parallel to the axle 15.

  As described above, the motion transmission mechanism 72 transmits the rotational motion of the rotary shaft 71 to the rod 53 of the pump 6A to drive the pump 6A. The mechanism 72 according to the second embodiment is configured by an eccentric ring 73 (excentor) provided to be fixed to the rotating shaft 71 in correspondence with the rod 53. Other configurations are the same as those in the first embodiment.

The second embodiment is configured as described above. Next, the operation and the like will be described. When the wheel 17 makes one rotation, the pump 6A, the rotating shaft 71, the weight 41, and the eccentric wheel 73 make a round around the axle 15. However, as in the first embodiment, both the weights 41 always have their weights. A downward posture is maintained (see FIG. 7). Therefore, each time the wheel rotates once, the rotating shaft 71 and the eccentric wheel 73 rotate once, and the eccentric wheel 73 pushes the piston 52 toward the bottom of the cylinder 51 via the rod 53 of the pump 6A.
When the piston 52 is pushed, compressed (pressure) air discharged from the cylinder 51 of the pump 6 </ b> A is injected into the tire 22 through the hose 4. Further, when the pushing by the eccentric ring 73 is released, the piston 52 and the rod 53 are restored by the action of the spring 56. Thus, every time the wheel rotates once, the piston 52 is reciprocated once (pump 6A is driven), and the compressed air is discharged. Therefore, air is always injected into the tire while the bicycle 1 is running. In FIG. 7, 9A shows a circular orbit around which the rotary shaft 71 goes around.

The piston pump 6A may be a piston pump of a type in which a pressure tank is provided on the bottom side of the cylinder. In the second embodiment, an example in which an eccentric wheel (exsen) is employed as the motion transmission mechanism 72 has been disclosed. However, it is of course possible to employ a motion transmission mechanism including a cam or a crank instead of the eccentric wheel. .
In addition, when the motion transmission mechanism comprised with the crank is employ | adopted, the said return spring 56 provided in the cylinder can be abbreviate | omitted.

  FIGS. 8 to 12 show another embodiment (Embodiment 3) of the present invention, and FIG. 8 is a front view showing an outline of a main part in a state where an automatic air inflation device for a tire is attached to a wheel of a bicycle. 9 is an explanatory diagram viewed from the direction, FIG. 9 is an explanatory diagram showing an enlarged outline of the main part, cut along line CC in FIG. 8, FIG. 10 is an explanatory diagram showing a portion of the body for pushing operation, FIG. FIG. 12 is an explanatory diagram showing the operation of the dry metal, and FIG. In the automatic tire filling apparatus according to the third embodiment, the same reference numerals are given to members and the like that are the same as those already described in the above-described embodiment, and description thereof is omitted.

  The third embodiment is characterized by the configuration of the air pump device 6 and the drive unit 8 that drives the pump device, the arrangement configuration of the drive unit 8, and the like.

  The air pump device 6 according to the third embodiment is composed of a reciprocating air pump as in the second embodiment. As the reciprocating type air pump, for example, a piston pump, a plunger pump, a diaphragm pump, or the like can be employed. In the third embodiment, an example in which the piston pump 6A is employed is disclosed.

  Since the piston pump 6A is configured in the same manner as the pump 6A of the second embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

The pump 6A is arranged so that the rotation of the wheel is not hindered, and the pump reciprocating operation part (piston rod 53 in the third embodiment) is oriented in a direction substantially orthogonal to the axle 15, and integrated with the wheel 17. It is attached to the wheel 17 so as to rotate. The mounting means for mounting the pump 6A can adopt any configuration.
In the third embodiment, the piston 6A is fixedly provided to the cylinder 51, and is provided to be fixed to the support member 63c that supports the piston 6A and the base end (lower end in FIG. 8) of the support member 63c. A mounting member 57a formed in a semicircular shape having substantially the same diameter as the outer diameter of the hollow cylindrical portion 26 and a mounting member 58a formed in a semicircular shape having substantially the same diameter as the outer diameter of the cylindrical portion 26 are provided. On both side edges of the mounting members 57a and 58a, flanges 59a and 60a projecting outward are formed.
Then, the hollow cylinder part 26 is sandwiched between the mounting members 57a and 58a, and both the flange parts 59a and 60a are fixed with the stoppers 61 such as bolts and nuts, thereby fixing the pump 6A to the hollow cylinder part. It is configured to do. As a result, the pump 6 </ b> A is disposed with the rod 53 directed in a direction substantially orthogonal to the axle 15, and is mounted on the wheel 17 so as to rotate integrally with the wheel 17.

  The drive unit 8 according to the third embodiment is provided with a weight 81 that is rotatably attached to the hollow cylinder portion 26 of the hub 23 of the wheel 17, and is fixed to the weight 81 and is rotatably attached to the hollow cylinder portion 26. And a push-motion moving body 82. The weight 81 is attached at a position allowing the rotation of the pump 6A (around the axle 15). Further, the push-motion moving body 82 is disposed in correspondence with the rod 53 of the pump 6A.

The weight 81 according to the third embodiment includes a weight body 84 having a tip end portion (upper end portion in FIG. 9) formed on a semicircular arc surface 83 having a diameter somewhat larger than the outer diameter of the hollow cylinder portion 26, and a hollow body 84. And a mounting member 85 formed in a semicircular shape somewhat larger in diameter than the outer diameter of the cylindrical portion 26. On both side edges at the tip of the weight body 84 and on both sides of the attachment member 85, flanges 86, 86 and 87, 87 projecting outward are formed.
Then, a dry metal 88 (oil-impregnated metal) is interposed, and the hollow cylindrical portion 26 is sandwiched between the circular arc surface 83 of the weight body 84 and the mounting member 85, and tightened with a stopper 89 such as a bolt or a nut so that both flange portions are clamped. The weight 81 is connected and fixed so as to be rotatably attached to the hollow cylindrical portion 26. The dry metal 88 will be described later.

The push-motion moving body 82 rotates the wheel 53 while rotating the rod 53 of the pump 6A in sliding contact with the outer peripheral surface of the working body 82, and pushes the piston 52 through the rod 53 to drive the pump 6A. To do.
The push-motion moving body 82 of the third embodiment is composed of an eccentric ring 90 (excent). The eccentric ring 90 is disposed so as to correspond to the rod 53 of the pump 6A, and is provided on the hollow cylindrical portion 26 so as to be rotatable and fixed to the weight. As shown in detail in FIG. 10, the eccentric ring 90 has a fitting hole 91 which is formed to have a diameter somewhat larger than the outer diameter of the hollow cylindrical portion 26 and is eccentric from the center. The eccentric ring 90 is composed of divided rings 90a and 90b divided into two parts.

  The eccentric ring 90 is fixed to the weight 81 as described above. The eccentric ring 90 of the third embodiment includes screw holes 92 and 93 at appropriate portions of both split rings 90a and 90b. The weight body 84 and the attachment member 85 are provided with screw holes (not shown) corresponding to the holes 92 and 93. One split ring 90 a is fixed to the attachment member 85 with a screw or the like 94, and the other split ring 90 b is fixed to the weight body 84 with a screw or the like 94. In this case, the fixing means is disclosed as an example, and it is a matter of course that any other means such as welding can be adopted.

  The weight 81 and the eccentric wheel 90 configured as described above are arranged so that the eccentric wheel 90 corresponds to the rod 53 and the weight 81 and the eccentric wheel 90 are rotatably attached to the hollow cylindrical portion 26. Then, by rotating the wheel 17, the piston pump 6 </ b> A is rotated while the end of the rod 53 is in sliding contact with the outer peripheral surface of the eccentric wheel 90.

  As shown in FIG. 11 in detail, the dry metal 88 according to the third embodiment is composed of a pair of divided metals 88a and 88b divided into two. In this case, it goes without saying that a bearing (split bearing) or the like can be employed instead of the dry metal.

The third embodiment is configured as described above. Next, the operation and the like will be described. When the wheel 17 makes one revolution, the pump 6A makes a round around the axle 15 while sliding the end portion of the rod 53 against the outer peripheral surface of the eccentric wheel 90. On the other hand, the eccentric wheel 90 always maintains substantially the same posture while the wheel rotates due to the gravity action of the weight 81 (see FIG. 12). for that reason. Each time the wheel rotates once, the rod 53 is pushed once at a predetermined portion, so that the piston 52 is pushed toward the bottom of the cylinder 51 via the rod 53.
When the piston 52 is pushed, compressed (pressure) air discharged from the cylinder 51 of the pump 6 </ b> A is injected into the tire 22 through the hose 4. Further, the piston 52 and the rod 53 are restored by the action of the return spring 56. Thus, every time the wheel rotates once, the piston 52 is reciprocated once (pump 6A is driven), and the compressed air is discharged. Therefore, air is always injected into the tire while the bicycle 1 is running.

The piston pump 6A may be a piston pump of a type in which a pressure tank is provided on the bottom side of the cylinder. In the third embodiment, an example in which an eccentric wheel (exsen) is used as the pressing body 82 is disclosed. However, it is of course possible to use a pressing body formed of a cam or the like instead of the eccentric wheel. .
In addition, as described above, a configuration in which a balancer is provided at an appropriate portion of the wheel can be employed. Furthermore, it is also possible to adopt a configuration in which another piston pump is disposed and disposed so as to face each other with the pressing body 82 sandwiched between the pump 6A.

  Further, in each of the above-described embodiments, an example in which the tire automatic inflating device of the present invention is mounted on a bicycle wheel has been disclosed, but the present invention device is a bicycle with an electric motor, any other auxiliary device, etc. It can be used by attaching to the wheel of a bicycle equipped with a vehicle, a motorcycle or other vehicles.

  Each of the above-described embodiments is disclosed as an example, and the present invention is not limited to the above-described embodiment, and may be arbitrarily set within the scope not departing from the technical idea described in the claims. It can be changed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an outline of the overall configuration in a state in which a tire automatic inflation device according to an embodiment of the present invention is attached to a bicycle wheel. It is a side view which expands and shows the part of the wheel which attached the same pneumatic equipment. It is explanatory drawing cut | disconnected by the AA line of FIG. 2, and showing the part expanded. It is operation | movement explanatory drawing of an air inflator same as the above. It is explanatory drawing seen from the front direction which shows the outline | summary of the principal part of the state which attached the automatic-pneumatic-pneumatic apparatus of the tire of other embodiment of this invention to the wheel of the bicycle. It is explanatory drawing which cut | disconnects by the BB line of FIG. 5, and shows the outline | summary of the principal part. It is action | operation explanatory drawing of the automatic inflator of FIG. It is explanatory drawing seen from the front direction which shows the outline | summary of the principal part of the state which attached the automatic air-pneumatic apparatus of the tire of further another embodiment of this invention to the wheel of the bicycle. FIG. 9 is an explanatory diagram showing an enlarged outline of the main part, cut along line CC in FIG. 8. It is explanatory drawing which shows the part of the body for pushing operation | movement employ | adopted as the automatic air filling apparatus of FIG. It is explanatory drawing which shows the dry metal employ | adopted as the automatic inflator of FIG. It is action | operation explanatory drawing of the automatic inflator of FIG.

Explanation of symbols

2 Air pump device 3 Drive unit 4 Hose 15 Axle 21 Rim 23 Hub 25 Tire air valve 31 Rotating shaft 38 Discharge port 41 Weight

Claims (10)

An automatic air inflator for tires that are used on wheels,
An air pump device that is mounted on a wheel without hindrance to rotation of the wheel and rotates integrally with the wheel, a drive unit that drives the pump device, a hose that connects a discharge port of the pump device and an air valve of the tire, With
The drive unit includes a weight that is rotatably provided on a wheel and fixed to a rotary shaft that is disposed substantially parallel to the wheel axle,
The rotating shaft is rotated once by the action of the weight each time the wheel rotates once, and the pump device is driven by transmitting the rotational motion of the rotating shaft.
Tire automatic inflator. The air pump device is composed of a rotary air pump, and the weight is fixedly provided on a rotation shaft of the pump,
2. The tire according to claim 1, wherein each time the wheel rotates once, the rotating shaft is rotated once by the action of the weight, and the pump is driven by a rotating motion of the rotating shaft. Automatic inflator. The air pump device comprises a reciprocating air pump,
The drive unit is rotatable on a wheel and is mounted so as to be disposed so as to be substantially parallel to the wheel axle, a weight fixed to the rotation shaft, and a rotational movement of the rotation shaft. A motion transmission mechanism for transmitting to
Each time the wheel rotates once, the rotary shaft is rotated once by the action of the weight, and the rotary motion of the rotary shaft is transmitted to the pump by the motion transmission mechanism to drive the pump. The tire automatic inflating device according to claim 1, characterized in that it is characterized in that:   4. The automatic tire filling apparatus according to claim 1, wherein the air pump device includes a relief valve. 5.   The tire automatic filling device according to any one of claims 1 to 4, further comprising a balancer attached to the wheel. An automatic air inflator for tires that are used on wheels,
A reciprocating air pump that is attached to the wheel without causing any trouble in the rotation of the wheel and rotates integrally with the wheel; a drive unit that drives the pump; a hose that connects the discharge port of the pump and the air valve of the tire; With
The pump is arranged with the reciprocating operation part of the pump directed in a direction substantially orthogonal to the wheel axle,
The drive unit is disposed corresponding to a weight that is rotatably attached to a hollow cylinder part of a hub of a wheel, and a reciprocating operation part of the pump, and is rotatable to the hollow cylinder part and fixed to the weight. A pushing action body provided
It is configured to drive the pump by rotating around the wheel while rotating the reciprocating operation part of the pump while sliding with the outer peripheral surface of the pressing body.
Tire automatic inflator.   The tire automatic filling device according to claim 6, wherein the pushing body is formed of an eccentric wheel.   The tire automatic filling device according to claim 6, wherein the push-motion body is constituted by a cam.   The tire automatic filling device according to any one of claims 6 to 8, wherein the pump includes a lily valve. The tire automatic filling device according to any one of claims 6 to 9, further comprising a balancer attached to the wheel.

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