Driving tool

Patent metadata

Field	Value
Publication number	US-12330280-B2
Application number	US-202318122795-A
Country	US
Kind code	B2
Filing date	Mar 17, 2023
Priority date	May 13, 2022
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

A preceding engaging portion preceding a last engaging portion has a smaller diameter or is positioned further inward than the last engaging portion. Because of this configuration, an engagement of the preceding engaging portion with respect to a last engaged portion becomes more easily disengageable in comparison to the last engaging portions. When the preceding engaging portion disengages from the last engaged portion, the driver moves downward to a standby position. Accordingly, an engagement of the engaging portions with the engaged portions can be properly corrected, such that the last engaging portion engages the last engaged portion at the standby position.

First claim

What is claimed is:

1. A driving tool, comprising:
a piston configured to move in a driving direction owing to a pressure of a gas;
a driver configured to drive a driving member by moving integrally with the piston in the driving direction; and
a wheel configured to move the driver in a direction opposite to the driving direction, wherein:
the driver includes a plurality of engaged portions arranged in a longitudinal direction of the driver;
the wheel includes a last engaging portion and a preceding engaging portion preceding the last engaging portion, the preceding engaging portion and the last engaging portion being configured to move the driver in a direction opposite to the driving direction by successively engaging an engaged portion of the plurality of engaged portions as the wheel rotates around a rotation center axis;
the last engaging portion and the preceding engaging portion are formed in a cylindrical shape and extend in a direction parallel to the rotation center axis of the wheel;
the last engaging portion and the preceding engaging portion each includes an outer area positioned further from the rotation center axis of the wheel;
the outer area of the preceding engaging portion is positioned further away from the driver when engaging the engaged portion in comparison to the outer area of the last engaging portion when engaging the engaged portion; and
a center of the preceding engaging portion is nearer to the rotation center axis of the wheel than a center of the last engaging portion.

2. The driving tool according to claim 1 , wherein the preceding engaging portion has a smaller diameter than the last engaging portion.

3. The driving tool according to claim 1 , wherein:
the plurality of engaged portions of the driver includes a last engaged portion that finally engages the wheel to move the driver upward;
the driver is slidably supported by a guide surface located on a side of the driver opposite to the wheel; and
the guide surface includes a relief portion that allows the driver to move in a direction away from the wheel when the last engaged portion of the driver engages the preceding engaging portion of the wheel.

4. The driving tool according to claim 1 , further comprising:
a guide surface configured to slidably support the driver on a side of the driver opposite to the wheel, wherein:
the plurality of engaged portions includes a last engaged portion that finally engages the wheel;

the wheel includes a plurality of engaging portions which are formed in the cylindrical shape and extend in the direction parallel to the rotation center axis of the wheel, the plurality of engaging portions including the last engaging portion and the preceding engaging portion preceding the last engaging portion; and
the guide surface includes a relief portion that allows the driver to move in a direction away from the wheel when the last engaged portion of the driver engages the preceding engaging portion of the wheel.

5. The driving tool according to claim 4 , wherein:
the guide surface includes a main guide surface that extends in the driving direction;
the relief portion is above, in the direction opposite to the driving direction, a portion of the main guide surface adjacent to a tip end of the driver when the driver is in a standby position, in which the last engaging portion of the wheel engages the last engaged portion of the driver; and
the relief portion is recessed in a direction away from the wheel in comparison to the main guide surface.

6. The driving tool according to claim 5 , wherein the guide surface includes a tilt surface that is tilted with respect to the main guide surface and extends from the main guide surface to the relief surface.

7. The driving tool according to claim 6 , wherein:
the tip end of the driver is configured to enter the relief portion; and
the tip end of the driver includes a tilt surface on a side of the driver facing the guide surface, the tilt surface being tilted with respect to the driving direction.

8. The driving tool according to claim 4 , wherein:
when the preceding engaging portion of the wheel engages the last engaged portion of the driver, the driver moves to the relief portion to cause the preceding engaging portion to disengage from the last engaged portion, thereby allowing the driver to move from the relief portion in the driving direction to the standby position in which the last engaging portion of the wheel engages the last engaged portion of the driver.

9. The driving tool according to claim 4 , wherein:
a length of the last engaged portion that protrudes from a side of the driver toward the wheel is larger than that of the other engaged portions of the plurality of engaged portions.

10. The driving tool according to claim 1 , wherein:
the plurality of engaged portions of the driver includes a last engaged portion that finally engages the last engaging portion of the wheel when the driver moves in the direction opposite to the driving direction; and
a length of the last engaged portion that protrudes from a side of the driver toward the wheel is larger than that of the other engaged portions of the plurality of engaged portions.

11. A driving tool, comprising:
a piston configured to move in a driving direction owing to a pressure of a gas;
a driver configured to drive a driving member by moving integrally with the piston in the driving direction along a driving axis; and
a wheel configured to move the driver in a direction opposite to the driving direction, wherein:
the driver includes a plurality of engaged portions arranged in a longitudinal direction of the driver;
the plurality of engaged portions includes a last engaged portion configured to finally engage the wheel as the wheel rotates and a preceding engaged portion configured to engage the wheel before the last engaged portion engages the wheel as the wheel rotates;
the wheel includes a last engaging portion and a preceding engaging portion preceding the last engaging portion which are formed in a cylindrical shape and extend in a direction parallel to an axis of rotation of the wheel, the preceding engaging portion and the last engaging portion being configured to move the driver in a direction opposite to the driving direction by engaging the plurality of engaged portions;
the preceding engaging portion more easily disengages from the last engaged portion than the last engaging portion disengages from the last engaged portion; and
a distance between a center of the preceding engaging portion and the axis of rotation of the wheel is smaller than a distance between a center of the last engaging portion and the axis of rotation of the wheel.

12. The driving tool according to claim 11 , wherein:
the driver and the wheel are in a standby state when the last engaging portion engages the last engaged portion, and
when in the standby state, no portion of the preceding engaging portion directly overlaps the last engaged portion in the driving direction.

13. The driving tool according to claim 12 , wherein a rotation angle of the wheel over which the preceding engaging portion engages the last engaged portion is less than a rotation angle of the wheel over which the last engaging portion engages the last engaged portion.

14. The driving tool according to claim 11 , wherein, as the wheel rotates, a closest distance between the preceding engaging portion and the driving axis is greater than a closest distance between the last engaging portion and the driving axis.

15. The driving tool according to claim 11 , wherein the preceding engaging portion has a diameter

Assignees

• Makita Corp

Inventors

• Baba Norikazu
• Kuriki Shun
• Fukuda Kazusa
• Nagao Masaya

Classifications

• B25C1/06

  operated by electric power · CPC title

• B25C5/13

  operated by fluid pressure · CPC title

• B25C1/047 Primary

  Mechanical details · CPC title

• B25C1/04 Primary

  operated by fluid pressure {, e.g. by air pressure} · CPC title