Portable band saw

Patent metadata

Field	Value
Publication number	US-12226842-B2
Application number	US-202217825930-A
Country	US
Kind code	B2
Filing date	May 26, 2022
Priority date	Jul 7, 2021
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A portable band saw reduces the overall size increase when a larger controller is included. A portable band saw includes a first saw wheel, a second saw wheel, a band saw blade placed on the first and second saw wheels, a motor that drives the first saw wheel and has a rotation axis in a front-rear direction, a controller that controls the motor, and a housing including a first housing accommodating the first saw wheel, a second housing accommodating the second saw wheel, and a bridge housing accommodating the motor between the first and second housings. The band saw blade is at least partly in an opening below the bridge housing. The controller is in the bridge housing with its maximum surface facing upward.

First claim

What is claimed is:

1. A portable band saw, comprising:
a first saw wheel;
a second saw wheel;
a motor (i) configured to drive the first saw wheel and (ii) having a motor rotation axis defining a front-rear direction of the portable band saw;
a band saw blade that (i) engages the first saw wheel and the second saw wheel and (ii) is configured to be driven by the first saw wheel;
a housing including
a first housing accommodating the first saw wheel,
a second housing (i) accommodating the second saw wheel and (ii) spaced from the first housing in the front-rear direction; and
a bridge housing (i) directly between the first housing and the second housing in the front-rear direction, (ii) connecting the first housing and the second housing and (iii) accommodating the motor in an internal space of the bridge housing; and

a controller (i) configured to control the motor, (ii) in the internal space and (iii) having a maximum surface that is inclined in an up-down direction of the portable band saw relative to the motor rotation axis, the up-down direction being perpendicular to the front-rear direction;
wherein:
the first housing, the second housing and the bridge housing define an opening (i) between the first housing and the second housing in the front-rear direction and (ii) below the bridge housing in the up-down direction;
the maximum surface of the controller is a surface of the controller that has a largest area when viewed perpendicular to the surface;
an entirety of the controller is above the motor rotation axis; and
the controller at least partly overlaps the motor in the front-rear direction,

the controller includes a first portion outside a largest diameter portion of the motor and a second portion inside the largest diameter portion of the motor in a radial direction of the motor rotation axis,
the first housing is behind the bridge housing,
the second housing is in front of the bridge housing, and
the entire second portion is frontward from the motor.

2. The portable band saw according to claim 1 , wherein
an inclination angle of the maximum surface of the controller is 5 to 25 degrees with respect to the motor rotation axis.

3. The portable band saw according to claim 1 , further comprising:
a subswitch assembly in a front of the bridge housing and operable to drive or stop the motor,
wherein the controller is at least partly between the motor and the subswitch assembly in the front-rear direction.

4. The portable band saw according to claim 3 , further comprising:
a main handle behind the bridge housing and connecting a rear portion of the bridge housing and the first housing; and
a main switch assembly in the main handle and operable to drive or stop the motor.

5. The portable band saw according to claim 4 , further comprising:
a variable speed dial in the main handle and operable to adjust a rotational speed of the motor.

6. The portable band saw according to claim 1 , wherein
the motor includes
a rotor, and
a stator surrounding the rotor and including a stator core, and

the portable band saw further comprises
a sensor board supporting a magnetic sensor configured to detect a position of the rotor in a rotation direction of the rotor, the sensor board being frontward from the stator core, and

a lead wire connecting the sensor board and the controller, the lead wire being connected to a lower portion of the sensor board.

7. The portable band saw according to claim 1 , further comprising:
a lamp (i) frontward from the motor, (ii) supported by the bridge housing and (iii) configured to illuminate the band saw blade in the opening.

8. The portable band saw according to claim 1 , further comprising:
a battery mount in an upper portion of the bridge housing and configured to receive and retain a battery pack including a rechargeable battery,
wherein the controller at least partly overlaps the battery mount in the front-rear direction.

9. The portable band saw according to claim 1 , wherein
the first portion is located in a front portion of the controller, and
the second portion is located in a rear portion of the controller.

Assignees

• Makita Corp

Inventors

• Okuhira Yuta
• Suzuki Yukinori
• Fujiwara Yuki

Classifications

• B23D53/12 Primary

  Hand-held or hand-operated sawing devices working with strap saw blades · CPC title