Impact tool

Patent metadata

Field	Value
Publication number	US-12337446-B2
Application number	US-202318543064-A
Country	US
Kind code	B2
Filing date	Dec 18, 2023
Priority date	Jan 18, 2023
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

An impact tool includes a light emitter unit that is isolated from vibrations. An impact tool includes a motor, a hammer rotatable by the motor, an anvil strikable by the hammer in a rotation direction, a hammer case accommodating the hammer, a light emitter unit including a light emitter that illuminates an area adjacent to a front end of the anvil, and a radial elastic member supported by the hammer case and supporting the light emitter unit from radially inside.

First claim

What is claimed is:

1. An impact tool, comprising:
a motor;
a hammer rotatable by the motor;
an anvil strikable by the hammer in a rotation direction;
a hammer case accommodating the hammer;
a light emitter unit including a light emitter configured to illuminate an area adjacent to a front end of the anvil; and
a radial elastic member supported by the hammer case and supporting the light emitter unit from radially inside,
wherein
the hammer case includes
a first cylinder surrounding the hammer,
a second cylinder located frontward from the first cylinder and having a smaller outer diameter than the first cylinder, and
a front wall connecting a front end of the first cylinder and a rear end of the second cylinder,

the light emitter unit at least partially surrounds the second cylinder, and
the radial elastic member includes a radial base between the second cylinder and the light emitter unit in a radial direction.

2. The impact tool according to claim 1 , wherein
the radial base includes
an inner circumferential surface facing an outer circumferential surface of the second cylinder, and
a radial rib protruding radially inward from the inner circumferential surface, and

the radial rib is in contact with the outer circumferential surface of the second cylinder.

3. The impact tool according to claim 1 , further comprising:
an elastic member supported by the hammer case, the elastic member supporting the light emitter unit from at least two of radially outside, rear, or front.

4. The impact tool according to claim 3 , wherein
the hammer case includes
a first cylinder surrounding the hammer,
a second cylinder located frontward from the first cylinder and having a smaller outer diameter than the first cylinder, and
a front wall connecting a front end of the first cylinder and a rear end of the second cylinder, and

the elastic member and the light emitter unit are located radially inward from a line connecting the front end of the first cylinder and a front end of the anvil in a cross section including a rotation axis of the anvil and parallel to the rotation axis.

5. The impact tool according to claim 1 , wherein
the light emitter unit includes a chip-on-board light-emitting diode.

6. An impact tool, comprising:
a motor;
a hammer rotatable by the motor;
an anvil strikable by the hammer in a rotation direction;
a hammer case accommodating the hammer;
a light emitter unit including a light emitter configured to illuminate an area adjacent to a front end of the anvil;
an elastic member supported by the hammer case, the elastic member including a front support supporting the light emitter unit from front; and
a ring spring fastened to at least a part of the hammer case and supporting the front support from front.

7. An impact tool, comprising:
a motor;
an output unit located frontward from the motor, the output unit being rotatable about an output rotation axis extending in a front-rear direction with a rotational force from the motor;
a bearing supporting the output unit in a rotatable manner;
a case holding the bearing;
an annular light assembly surrounding the case; and
a front bumper located frontward from the light assembly and covering at least a part of a surface of the case, the front bumper comprising rubber and being in contact with at least a part of a front surface of the light assembly.

8. The impact tool according to claim 7 , wherein
the front bumper includes
a cylindrical portion surrounding the case, and
a protrusion protruding radially inward from an inner circumferential surface of the cylindrical portion, the protrusion being received in a groove on an outer circumferential surface of the case.

9. The impact tool according to claim 7 , wherein
the light assembly includes
a light emitter unit surrounding the case and including a light emitter, and
a radial elastic member supported by the case and supporting the light emitter unit from radially inside, and

the front bumper is in contact with at least a part of a front surface of the radial elastic member.

10. The impact tool according to claim 9 , wherein
the light emitter unit includes an optical member facing a front surface of the light emitter, and the optical member transmits light emitted from the light emitter,
the radial elastic member at least partially faces a front surface of the optical member, and
the front bumper supports the optical member from front with the radial elastic member in between.

11. The impact tool according to claim 10 , wherein
the front bumper has an outer end located radially outward from an inner end of the optical member.

12. The impact tool according to claim 11 , wherein
the light assembly includes an axial elastic member supporting the light emitter unit from rear.

13. The impact tool according to claim 12 , wherein
the case includes
a front cylinder holding the bearing,
a rear cylinder located rearward from the front cylinder and having a larger outer diameter than the front cylinder,
a front wall connecting a front end of the rear cylinder and a rear end of the front cylinder, and
an annular rib protruding frontward from an outer edge of a front surface of the front wall, and

the axial elastic member is at least partially between the annular rib and the light emitter unit in a radial direction.

14. The impact tool according to claim 13 , further comprising:
a rear bumper comprising rubber and covering an outer circumferential surface of the rear cylinder and an outer circumferential surface of the annular rib.

15. The impact tool according to claim 14 , wherein
each of the radial elastic member and the axial elastic member comprises rubber, and
each of the front bumper and the rear bumper has a higher rubber hardness than the radial elastic member or the axial elastic member.

16. The impact tool according to claim 14 , wherein
the rear bumper has a front end located rearward from a rear end of the optical member.

17. The impact tool according to claim 14 , wherein
the rear bumper has a front end overlapping a rear end of the axial elastic member in a radial direction.

18. The impact tool according to claim 7 , further comprising:
a main housing including
a body accommodating the motor,
a protruding portion protruding downward from the body,
a controller compartment behind the protruding portion, and
a grip behind the body, the grip including
a rear grip extending upward from a rear portion of the controller compartment, and
an upper grip extending frontward from an upper end of the rear grip, the rear grip having a lower end connected to the controller compartment and an upper end connected to a rear end of the upper grip, the upper grip having a front end connected to an upper portion of the body.

19. The impact tool according to claim 7 , further comprising:
a main housing including
a body accommodating the motor,
a grip protruding downward from the body, and
a battery holding portion connected to a lower end of the grip.

Assignees

• Makita Corp

Inventors

• Suzuki Yuta
• Chikaraishi Makoto
• Ohkawara Seiichi

Classifications

• B25D11/00

  Portable percussive tools with electromotor {or other motor} drive · CPC title

• B25F5/006

  Vibration damping means · CPC title

• B25F5/026

  in the form of an auxiliary handle (B25F5/024 takes precedence) · CPC title

• B25B21/02

  with means for imparting impact to screwdriver blade or nut socket · CPC title

• B25B23/18 Primary

  Devices for illuminating the head of the screw or the nut · CPC title