US-20260124726-A1 - WORKING MACHINE

US20260124726A1US 20260124726 A1US20260124726 A1US 20260124726A1US-20260124726-A1

Abstract

Provided is a working machine capable of improving workability. A working machine includes an electric motor, a gearbox, a wind-up wheel, a plunger, a spring, a trigger, and a housing, and in a first direction, an end portion of the gearbox on one side is located on the other side with respect to an end portion of the trigger on the other side. As a result, since the center of gravity G of the working machine and the trigger can be brought close to each other, the workability can be improved.

Inventors

Tatsuhiro Tago
Toshinori YASUTOMI
Tomomasa Nishikawa

Assignees

KOKI HOLDINGS CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20241107

Claims (19)

1 . A working machine comprising: a movement unit that moves downward to strike a stopper; a biasing unit that biases the movement unit downward; an operation unit that lifts the movement unit upward against biasing force of the biasing unit; a drive unit having a drive shaft extending in a front-rear direction; a deceleration unit disposed between the drive unit and the operation unit in the front-rear direction and configured to decelerate and output driving force of the drive unit; a transmission unit that transmits the output of the deceleration unit to the operation unit; a housing having a drive unit case housing the drive unit, the transmission unit, and the operation unit, and a handle located above the drive unit case and extending in the front-rear direction; and a manipulating unit protruding downward from the handle, wherein the drive unit case has a drive unit housing surface which is an upper surface of a portion housing the drive unit and a constricted portion which is an upper surface of a portion housing the transmission unit and is located lower than the drive unit housing surface, the manipulating unit is disposed so as to overlap with the constricted portion in an up-down direction, and a lower end of the manipulating unit is disposed lower than the drive unit housing surface.
2 . The working machine according to claim 1 , wherein the handle is inclined with respect to an axis of the drive shaft so as to extend downward on a front side.
3 . The working machine according to claim 1 , wherein the drive unit has an outer diameter larger than that of the operation unit.
4 . The working machine according to claim 1 , wherein a center of gravity is disposed lower than the drive unit housing surface.
5 . The working machine according to claim 4 , wherein the center of gravity is disposed higher than an upper end of the drive unit.
6 . The working machine according to claim 5 , wherein the center of gravity is disposed in rear of the manipulating unit.
7 . The working machine according to claim 1 , wherein the operation unit is disposed coaxially with the drive unit and rotates to move the movement unit, and the constricted portion is disposed lower than an upper end of the operation unit.
8 . The working machine according to claim 1 , wherein the manipulating unit is disposed in rear of a rear end of the operation unit and in front of a front end of the deceleration unit.
9 . The working machine according to claim 1 , further comprising a controller that controls driving of the drive unit, wherein the controller is disposed in rear of the drive unit such that a lower end of the controller is located lower than the drive unit housing surface.
10 . The working machine according to claim 9 , wherein a rear end portion of the handle houses the controller, extends in the up-down direction, and is coupled to the drive unit case, and a rear end of the drive unit is disposed in rear of a front surface of the rear end portion of the handle.
11 . The working machine according to claim 10 , further comprising a battery pack attached to the rear end portion of the handle, wherein an upper end of the battery pack is located higher than an upper end of the handle.
12 . The working machine according to claim 1 , wherein the transmission unit has a built-in element disposed on an upper side in the constricted portion and disposed on a lower side in the constricted portion.
13 . The working machine according to claim 12 , further comprising a contact unit to be operated by contacting a partner member, wherein the built-in element is provided to detect operation of the contact unit and control driving of the drive unit.
14 . The working machine according to claim 1 , further comprising a contact unit to be operated by contacting a partner member, wherein a detection unit that detects operation of the contact unit is provided between the operation unit and the deceleration unit in the front-rear direction.
15 . The working machine according to claim 1 , further comprising a trigger switch provided inside the handle to detect operation of the manipulating unit.
16 . The working machine according to claim 1 , wherein a distance between the drive unit housing surface and the constricted portion in the up-down direction is 15 mm or more.
17 . The working machine according to claim 1 , further comprising an ejection unit fixed to the housing and configured to eject the stopper struck by the movement unit, wherein a lower end of the manipulating unit is disposed lower than a center between an upper end of the housing and a lower end of the ejection unit in the up-down direction.
18 . A working machine comprising: a movement unit that moves downward to strike a stopper; a biasing unit that biases the movement unit downward; an operation unit that lifts the movement unit upward against biasing force of the biasing unit; a drive unit having a drive shaft extending in a front-rear direction; a deceleration unit disposed between the drive unit and the operation unit in the front-rear direction and configured to decelerate and output driving force of the drive unit; a transmission unit that transmits the output of the deceleration unit to the operation unit; a housing having a drive unit case housing the drive unit, the transmission unit, and the operation unit, and a handle located above the drive unit case and extending in the front-rear direction; a manipulating unit protruding downward from the handle; and an ejection unit fixed to the housing and configured to eject the stopper struck by the movement unit, wherein a lower end of the manipulating unit is disposed lower than a center between an upper end of the housing and a lower end of the ejection unit in an up-down direction.
19 . A working machine comprising: a movement unit that moves downward to strike a stopper; a biasing unit that biases the movement unit downward; an operation unit that lifts the movement unit upward against biasing force of the biasing unit; a drive unit having a drive shaft extending in a front-rear direction; a deceleration unit disposed between the drive unit and the operation unit in the front-rear direction and configured to decelerate and output driving force of the drive unit; a transmission unit that transmits the output of the deceleration unit to the operation unit; a housing having a drive unit case housing the drive unit, the transmission unit, and the operation unit, and a handle located above the drive unit case and extending in the front-rear direction; and a manipulating unit protruding downward from the handle, wherein the drive unit case has a drive unit housing surface which is an upper surface of a portion housing the drive unit and a constricted portion which is an upper surface of a portion housing the transmission unit and is located lower than the drive unit housing surface, the operation unit is disposed coaxially with the drive unit and rotates to move the movement unit, and the constricted portion is disposed lower than an upper end of the operation unit.

Description

TECHNICAL FIELD The present invention relates to a working machine including a drive unit, a deceleration unit, an operation unit, a movement unit, and a manipulating unit. BACKGROUND ART Patent Document 1 describes a working machine including a deceleration unit that decelerates and outputs the driving force of a drive unit, an operation unit that moves the movement unit by the output of the deceleration unit, and a manipulating unit that controls driving of the drive unit, in which the deceleration unit is disposed below the manipulating unit. RELATED ART DOCUMENTS Patent Documents Patent Document 1: Japanese Unexamined Patent Application Publication No. 2019-087637 SUMMARY OF THE INVENTION Problems to be Solved by the Invention In the working machine described in Patent Document 1, it is necessary to provide a space for inserting a worker's finger below the manipulating unit. However, when the manipulating unit is separated to the upper side from a heavy object such as the deceleration unit or the drive unit in order to provide such a space, the manipulating unit and a handle provided with the manipulating unit are separated from the center of gravity of the working machine, and the worker is easily tired. Thus, there is room for improvement in workability. Further, separation of the manipulating unit to the upper side leads to an increase in size of the entire working machine. An object of the present invention is to provide a working machine capable of improving workability. Another object of the present invention is to provide a working machine which can be reduced in size. Means for Solving the Problems A working machine of one embodiment includes a movement unit that moves downward to strike a stopper, a biasing unit that biases the movement unit downward, an operation unit that lifts the movement unit upward against the biasing force of the biasing unit, a drive unit having a drive shaft extending in a front-rear direction, a deceleration unit disposed between the drive unit and the operation unit in the front-rear direction and configured to decelerate and output the driving force of the drive unit, a transmission unit that transmits the output of the deceleration unit to the operation unit, a housing having a drive unit case housing the drive unit, the transmission unit, and the operation unit, and a handle located above the drive unit case and extending in the front-rear direction, and a manipulating unit protruding downward from the handle. The drive unit case has a drive unit housing surface which is the upper surface of a portion housing the drive unit and a constricted portion which is the upper surface of a portion housing the transmission unit and is located lower than the drive unit housing surface, and the lower end of the manipulating unit is disposed lower than the drive unit housing surface. A working machine of another embodiment includes a movement unit that moves downward to strike a stopper, a biasing unit that biases the movement unit downward, an operation unit that lifts the movement unit upward against the biasing force of the biasing unit, a drive unit having a drive shaft extending in a front-rear direction, a deceleration unit disposed between the drive unit and the operation unit in the front-rear direction and configured to decelerate and output the driving force of the drive unit, a transmission unit that transmits the output of the deceleration unit to the operation unit, a housing having a drive unit case housing the drive unit, the transmission unit, and the operation unit, and a handle located above the drive unit case and extending in the front-rear direction, a manipulating unit protruding downward from the handle, and an ejection unit fixed to the housing and configured to eject the stopper struck by the movement unit. The lower end of the manipulating unit is disposed lower than the center between the upper end of the housing and the lower end of the ejection unit in an up-down direction. EFFECTS OF THE INVENTION In the working machine of one embodiment, an end portion of the deceleration unit on one side is located on the other side with respect to an end portion of the manipulating unit on the other side in a first direction. As a result, the center of gravity of the working machine and the manipulating unit can be brought close to each other, so that the workability of the working machine can be improved. Further, in the working machine of one embodiment, the outer diameter of a coupling shaft coaxially coupling the deceleration unit and the operation unit is smaller than that of the deceleration unit, and the coupling shaft is disposed at a position overlapping with at least part of the manipulating unit in a second direction. As a result, separation of the manipulating unit to the one side in the second direction can be prevented, so that the working machine can be reduced in size. BRIEF DESCRIPTIONS OF THE DRAWINGS FIGS. 1A-1B are views showing a working ma