JPH059202Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting device used for mounting an air valve to a wheel.

[Conventional technology]

Conventionally, when installing air valves on wheels,
For example, when attaching an air valve for a tubeless tire to a wheel, as shown in Figure 6, first insert the air valve 3 from below into the valve hole 2 of the wheel 1, and then use a jig 4 with a forked tip. The tip opening 5 of the jig 4 is hooked onto the valve cap 6, and the air valve 3 is pulled up and installed using the rim flange of the wheel as a fulcrum 7 using the principle of leverage.

However, with such a method that relies on human power, it is difficult to save labor and improve productivity, and there is also a risk that the cap 6 may be scratched or the paint may peel off at the fulcrum 7.

Therefore, as shown in FIG. 7, the applicant has previously proposed a mounting device in which the air valve 3 can be mounted while pulling up the valve cap 6 with a pair of jaws 8 (Utility Model Publication No. 59-151706). Publication No.).

[The problem that the idea aims to solve]

However, as wheels, particularly aluminum wheels, become more fashionable, the air valve 3 has come to be housed within the disk of the wheel 9, as shown in FIGS. 8 and 9, for example.
With such a mounting structure, when mounting the air valve 3, it is not possible to use the mounting device shown in Fig. 7. For example, as shown in Fig. 10, the cap of the air valve 3 is removed and the A method such as attaching the tension lever 10 and pulling up the extension lever 10 with a jig 4 as shown in FIG. 6 is used. However, this method requires time and effort to install, and
There is a problem similar to that of the method shown in FIG.

An object of the present invention is to provide an air valve mounting device that can easily and quickly mount an air valve even in the case of an in-wheel retractable air valve mounting structure.

[Means to solve the problem]

To achieve this purpose, the air valve mounting device of the present invention has an air valve threaded part on the inner periphery of the front end that can be screwed into the threaded part of the air valve, a screw for movement on the outer periphery of the rear end, and an axially centered a movable shaft that is rotatable around the movable shaft and capable of reciprocating in the axial direction; a nose provided on the outer periphery of the movable shaft and movable relative to the movable shaft in the axial direction; and a nose fixed in the axial direction and movable around the axis. a circular nut that is rotatable and is screwed into a moving screw at the rear end of the movable shaft and moves the movable shaft in the axial direction when rotated relative to the movable shaft; and a circular nut that is arranged concentrically with the movable shaft. has a drive shaft,
a rotational drive means capable of forward and reverse rotation; and a rotational drive means provided on the movable shaft and biased by a spring so as to be removably engaged with a notch formed in the drive shaft; a stopper pin for disconnecting and disconnecting rotation between the movable shaft; a front clutch axially removably connected to the circular nut; and a front clutch axially removably connected to the front clutch; a rear clutch biased toward the drive means by a spring; and a clutch pin that is fixed to the rear clutch and separates the rear clutch from the front clutch by coming into contact with the end of the movable shaft when the movable shaft moves a predetermined amount toward the drive means. It consists of what is provided.

[Effect]

In the air valve mounting device configured in this way, the force in the rotational direction of the drive shaft of the rotary drive means is transmitted to the movable shaft via the stopper pin.
During normal rotation of the rotation driving means, the rotation of the movable shaft causes the threaded portion of the movable shaft for the air valve to be screwed into the threaded portion of the air valve on the wheel side. The force in the rotational direction of the drive shaft of the rotary drive means is also transmitted to the circular nut via the rear clutch and the front clutch, but when the movable shaft rotates, the circular nut is in an unrotated state.

When the threaded part of the air valve on the movable shaft and the threaded part of the air valve on the wheel side are completed,
Since the movable shaft can no longer rotate, the rotation of the movable shaft is stopped. In this state, since the circular nut is rotating, the movable shaft moves in the axial direction due to the rotation of the circular nut, and the movable shaft is drawn into the nose. Therefore, the air valve is pulled up to a predetermined position, and the installation of the air valve onto the wheel is completed.

When the installation of the air valve is completed, the clutch pin comes into contact with the shaft end of the movable shaft, so the rear clutch is separated from the front clutch, and rotational driving force is no longer transmitted from the rotary drive means to the circular nut, preventing axial movement of the movable shaft. will be automatically stopped.

Next, when the rotation drive means is reversely rotated,
The rear clutch and front clutch are reconnected, and the circuit nut is rotated in the opposite direction. In this state, the movable shaft moves in a direction that projects relative to the nose. When the movement of the movable shaft is completed, the stopper pin on the movable shaft side enters the notch of the drive shaft of the rotational drive means, and the movable shaft and the drive shaft are connected in the rotation direction. Therefore, the movable shaft rotates in the opposite direction, and the threaded engagement between the air valve threaded portion of the movable shaft and the threaded portion of the air valve on the wheel side is released.

In this way, the installation of the air valve does not require manual operation or an extension lever, making it possible to perform the installation work extremely easily and in a short time.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 and 2 show an air valve mounting device for a wheel according to an embodiment of the present invention, and FIGS. 3 to 5 conceptually show how the air valve is mounted.

In FIGS. 1 and 2, 11 indicates the entire air valve mounting device, and 12 indicates a movable shaft. On the inner periphery of the front end of the movable shaft 12, there is a third
Air valve threaded part 1 that can be screwed into the threaded part 101 for the cap mounting part of the air valve 100 shown in the figure.
3 is formed. A moving screw 12a is formed on the outer periphery of the rear end of the movable shaft 12, and is screwed into a circular nut 25, which will be described later. Movable axis 12
is provided so as to be able to reciprocate in the axial direction and to be rotatable around the axis.

The tip of the housing 14 of the device is provided with a nose 15 that can come into contact with a portion 104 near an air valve mounting portion (mounting hole) 103 of a wheel 102 as shown in FIG. 5, for example. Movable axis 12
is a relative displacement (reciprocating movement,
rotation), or conversely, the nose 15 is movable axis 1
It is possible to displace it relative to 2. The nose 15 is fixed to a nose slider 16, and the nose slider 16 is slidably held by a nose housing 17.

A circular nut 25 is provided inside the housing 14. Circular Nut 25
is held by a bearing 29. The circular nut 25 is fixed in the axial direction and rotatable around the axis. A female thread 25a is formed on the inner periphery of the circular nut 25 and is threadedly engaged with the moving thread 12a at the rear end of the movable shaft 12. The circular nut 25 is connected to the movable shaft 12
When the movable shaft 12 rotates relative to the movable shaft 12, the movable shaft 12 is moved in the axial direction.

An air motor 18 is attached to one side of the housing 14 as a rotational drive means. By pushing the throttle lever 19, the air motor 18 rotates the movable shaft 12 in a direction (clockwise rotation) in which the valve nut part 13 is screwed into the threaded part 101 of the air valve 100, and in addition to the throttle lever 19, the reverse lever 20 By pushing the movable shaft 12 , the valve nut part 13 connects to the threaded part 10 of the valve 100 .
It is designed to rotate in the opposite direction (counterclockwise rotation) away from 1.

The air motor 18 has a drive shaft 21 arranged concentrically with the movable shaft 12 . The drive shaft 21 is formed into a cylindrical shape. A notch 30 extending in the axial direction is formed in the drive shaft 21 . Movable axis 12
A stopper portion 26 is formed at the shaft end.
A storage hole 26a is formed in the stopper portion 26 and extends in a direction perpendicular to the axial direction of the movable shaft 12. A stopper pin 28 biased by a compression spring 27 is housed in the housing hole 26a so as to releasably protrude into a notch 30 formed in the drive shaft 21.

When the stopper pin 28 enters the notch 30, the rotational force of the drive shaft 21 is transmitted to the movable shaft 12. When the stopper portion 26 of the movable shaft 12 moves toward the air motor 18 due to the rotation of the circular nut 25, the stopper pin 2
8 is no longer able to engage with the notch 30 of the drive shaft 21, and the rotational force of the drive shaft 21 is no longer transmitted to the movable shaft 12.

A front clutch 22 is attached to the outer periphery of the drive shaft 21.
and a rear clutch 23 are arranged. The front clutch 22 and the rear clutch 23 are connected to the circular nut 25 by the spring force of the compression spring 31.
biased toward the side. The front clutch 22 is
It is detachably connected to the circular nut 25 in the axial direction. The rear clutch 23 is axially detachably connected to the front clutch 22.
The front clutch 22 and the rear clutch 23 are comprised of dog clutches. The front clutch 22 functions as a kind of torque limiter, and the rear clutch 23 has the function of intermittent transmission of rotational force.

A clutch pin 24 connected to the drive shaft 21 is fixed to the rear clutch 23. The clutch pin 24 is movable in the axial direction of the drive shaft 21. The clutch pin 21 comes into contact with the stopper portion 26 of the movable shaft 12 when the movable shaft 12 moves a predetermined amount toward the air motor 18, and the rear clutch 2
3 from the front clutch 22.

Next, the operation of the above air valve mounting device will be explained.

By supplying air to the air motor 18 of the air valve mounting device 11 via an air hose or the like and pushing the throttle lever 19, the drive shaft 21 is rotationally driven. The rotational force of the drive shaft 21 is applied to the clutch pin 24, the rear clutch 23, and the front clutch 22.
The signal is transmitted to the circular nut 25 through the circular nut 25, and the circular nut 25 is rotated clockwise (forward rotation). Further, the rotational force of the drive shaft 21 is transmitted to the movable shaft 12 via the stopper pin 28, and the movable shaft 12 is rotated clockwise.

As shown in FIG. 4, in this state, when the valve nut part 13 is applied to the threaded part 101 of the air valve 100 inserted into the air valve mounting hole 103 of the wheel 102, the air valve threaded part 13 of the movable shaft 12 100, and when it reaches a certain screwing depth, the nose 1
5 comes into contact with the fulcrum portion 104 of the wheel 102.

Here, the force in the rotational direction of the drive shaft 21 of the air motor 18 is also transmitted to the circular nut 25 via the rear clutch 23 and the front clutch 22, but when the movable shaft 12 rotates, the circular nut 25 is in a state of being rotated. becomes.

When the screwing of the air valve threaded portion 13 of the movable shaft 12 and the threaded portion 101 of the air valve 100 is completed, the movable shaft 12 can no longer rotate, so the rotation of the movable shaft 12 is stopped. In this state, the circuit nut 25 is rotating, so
The movable shaft 12 is moved in the axial direction (arrow direction) by the rotation of the circular nut 25, and the movable shaft 12 is drawn into the nose 15. Therefore, the air valve 100 is pulled up to a predetermined position, and as shown in FIG.
00 onto the wheel 102 is completed.

After the installation of the air valve 100 is completed, the movable shaft 12
When reaches the stroke end, the stopper part 26
Clutch pin 24 is pushed. As a result, the meshing distance between the front clutch 22 and the rear clutch 23 becomes smaller, and the front clutch 22
Due to the slippage between the rear clutch 23 and the rear clutch 23, power transmission from the rear clutch 23 to the front clutch 22 is stopped. In this way, when the stopper portion 26 at the end of the movable shaft 12 is in contact with the clutch pin 24, the rear clutch 23 is in contact with the front clutch 22.
be effectively separated from the Therefore, the rotation of the circular nut 25 is stopped, and the retraction of the movable shaft 12 is automatically stopped.

Next, the reverse lever 20 is pressed while the throttle lever 19 is being pressed, and the air motor 18 is reversed (rotated to the left). Stopper part 2 of movable shaft 12
6 is in contact with the clutch pin 24,
Because the meshing teeth of the rear clutch 23 are slightly in contact with the meshing teeth of the front clutch 22 due to the spring force of the compression spring 31, the air motor 21
When the rotation is reversed, the circular nut 25 is rotated in the reverse rotation direction due to the slight meshing resistance between the front clutch 22 and the rear clutch 23. In this state, the stopper portion 26 of the movable shaft 12 moves in a direction away from the clutch pin 24, and the meshing distance between the rear clutch 23 and the front clutch 22 gradually increases. When the stopper portion 26 is completely separated from the clutch pin 24, the rear clutch 23 and the front clutch 22 are reliably connected, and the circular nut 25 is fully rotated in the reverse direction. In this state, the movable shaft 12 moves in a direction in which it projects relative to the nose 15. When the movement of the movable shaft 12 is completed, the stopper pin 28 on the movable shaft 12 side is in the notch 3 of the drive shaft 21 of the air motor 18.
0, and the movable shaft 12 and the drive shaft 21 are connected in the rotational direction. Therefore, the movable shaft 12 rotates in the opposite direction, and the threaded engagement between the air valve threaded portion 13 of the movable shaft 12 and the threaded portion 101 of the air valve 100 is released.

In this way, in this embodiment, the air valve mounting hole 10 can be adjusted by simply operating the throttle lever 19 and reverse lever 20 of the air motor 18.
The air valve 100 inserted into the air valve 3 can be automatically and quickly installed in the normal state.

[Effect of idea]

According to this invention, the movable shaft can be automatically switched from rotation around the axis to movement in the axial direction, so the air valve can be reliably and easily attached to the wheel without using an extension lever or the like. can facilitate work, save labor,
It can significantly improve productivity.

In addition, since it is possible to rotate the movable shaft around the axis and move the movable shaft in the axial direction using a single rotary drive means, the mechanism is simplified and the air valve mounting device is lightweight and compact. can be converted into This makes it possible to increase work efficiency and reduce the cost of the air valve mounting device.

[Brief explanation of the drawing]

Fig. 1A is a sectional view of an air valve mounting device according to an embodiment of the present invention, Fig. 1B is a front view of the mounting device of Fig. 1, and Fig. 2 is a side view showing the external appearance of the mounting device of Fig. 1. Figure 3 is a schematic sectional view showing the positional relationship between the tip of the mounting device in Figure 1 and the air valve before or after installation, and Figure 4 shows the state immediately before the air valve is installed using the installation device in Figure 1. FIG. 5 is a schematic cross-sectional view of the area around the air valve mounting part showing the state after the air valve has been installed and before the mounting device is removed. FIG. 6 is a perspective view showing the conventional air valve mounting method. Figure 7 is a schematic diagram of the tip end of the mounting device previously proposed by the present applicant (Japanese Utility Model Publication No. 59-151706), and Figure 8 is a schematic partial cross-sectional view of a wheel showing a retractable air valve mounting structure in the wheel. FIG. 9 is an enlarged partial sectional view of the structure of FIG. 8, and FIG. 10 is a perspective view showing a conventional method of using an extension lever. DESCRIPTION OF SYMBOLS 11... Air valve mounting device, 12... Movable shaft, 13... Threaded part for air valve, 15... Nose, 18... Rotation drive means, 21... Drive shaft, 2
2... Front clutch, 23... Rear clutch, 24... Clutch pin, 25... Circular nut, 28... Stopper pin, 30... Notch, 100... Air valve, 101... Threaded portion of air valve, 102... Wheel.

Claims (1)

[Claims for Utility Model Registration] The air valve has an air valve threaded part on the inner periphery of the front end that can be screwed into the threaded part of the air valve, has a screw for movement on the outer periphery of the rear end, and is rotatable around the axis in the axial direction. a movable shaft that is capable of reciprocating, a nose provided on the outer periphery of the movable shaft and movable relative to the movable shaft in the axial direction; and a nose that is fixed in the axial direction and rotatable around the axis; a circular nut that is screwed into a moving screw at the rear end of the movable shaft and moves the movable shaft in the axial direction when rotated relative to the movable shaft; and a drive shaft that is arranged concentrically with the movable shaft;
a rotational drive means capable of forward and reverse rotation; and a rotational drive means provided on the movable shaft and biased by a spring so as to be removably engaged with a notch formed in the drive shaft; a stopper pin for disconnecting and disconnecting rotation between the movable shaft; a front clutch axially removably connected to the circular nut; and a front clutch axially removably connected to the front clutch; a rear clutch biased toward the drive means by a spring; and a clutch pin that is fixed to the rear clutch and separates the rear clutch from the front clutch by coming into contact with the end of the movable shaft when the movable shaft moves a predetermined amount toward the drive means. Equipped with air valve mounting device.