Granted Patent B1

US 10,946,506 · App. 17/100,221 · Granted Mar 16, 2021

Inventor: Takashi Ueda (Ibaraki, JP)

Assignee: KOKI HOLDINGS CO., LTD.

B25C7/00B25C1/008B25C1/047B25C1/06B25C1/08B25F5/006B25F5/008

Abstract

Claims (43)

1. A driving machine for driving a fastener into a workpiece, the driving machine comprising:

a piston;

a cylinder in which the piston travels in a first direction and a second direction opposite the first direction;

a compression chamber configured to be filled with a gas for moving the piston in the first direction;

a damper configured to absorb a kinetic energy of the piston;

a striker coupled to the piston and configured to apply driving force to the fastener;

a motor;

a drive shaft coupled to the motor, the drive shaft extending in a direction crossing a traveling direction of the piston;

a rotary component coupled to the drive shaft and configured to, when rotated by the motor, move the striker in the second direction; and

first and second bearings disposed to sandwich the rotary component and support the drive shaft.

2. The driving machine according to claim 1 , further comprising a support including a damper retaining part supporting the damper, and a bearing support part, integrally formed with the damper retaining part, supporting one of the first and second bearings.

3. The driving machine according to claim 2 , wherein the one of the first and second bearings, supported by the bearing support part, is located farther from the motor than another one of the first and second bearings.

4. The driving machine according to claim 2 , further comprising a housing including a first part and a second part, wherein

the rotary component and the support are covered by the first part and the second part.

5. The driving machine according to claim 4 ,

wherein each of the first and second parts of the housing includes:

a cylinder case part;

a handle part extending from the cylinder case part in a direction crossing the traveling direction of the piston; and

a motor case part extending in a direction parallel with the handle part,

wherein the cylinder case part is coupled with another cylinder case part to cover the cylinder,

wherein the handle part is coupled with another handle part to form a handle, and

wherein the motor case part is coupled with another motor case part to cover the motor.

6. The driving machine according to claim 1 ,

wherein the rotary component has protrusions disposed along a rotating direction of the rotary component, and

wherein the striker has a rack to engage with the protrusions, the rack extending along the traveling direction of the piston.

7. The driving machine according to claim 6 ,

wherein the protrusions include pins each having first and second sides,

wherein the rotary component hold the first and second sides of each pin, and

wherein the rack engages the pins.

8. The driving machine according to claim 1 , wherein a part of the drive shaft is located directly underneath the compression chamber when the cylinder is in an upright position.

9. The driving machine according to claim 1 , wherein a part of the first and second bearings are located directly underneath the compression chamber when the cylinder is in an upright position.

10. The driving machine according to claim 1 ,

wherein the motor has a motor shaft, and

where the driving machine further comprises third and fourth bearings supporting both ends of the motor shaft.

11. The driving machine according to claim 10 , further comprising a reduction gear disposed between the motor and the drive shaft,

wherein the reduction gear is a planetary gear to transmit rotation of the motor to the drive shaft, and

wherein one of the third and fourth bearings is disposed between the motor and the reduction gear.

12. The driving machine according to claim 1 , further comprising a filling valve connectable to a gas supply,

wherein the compression chamber has a bottom wall located radially outside the cylinder, and

wherein a gas from the gas supply is filled in the compression chamber through the filling valve and the bottom wall.

13. A method of using a driving machine for driving a fastener into a workpiece, the driving machine comprising: a piston; a cylinder in which the piston travels in a first direction and a second direction opposite the first direction; a compression chamber configured to be filled with a gas for moving the piston in the first direction; a damper configured to absorb a kinetic energy of the piston; a striker coupled to the piston and configured to apply driving force to the fastener; a motor; a drive shaft coupled to the motor, the drive shaft extending in a direction crossing a traveling direction of the piston; a rotary component coupled to the drive shaft and configured to, when rotated by the motor, move the striker in the second direction; and first and second bearings disposed to sandwich the rotary component and support the drive shaft, the method comprising:

moving the piston in the first direction to drive the fastener into the workpiece with the striker; and

controlling the motor to rotate the rotary component to move the striker in the second direction.

Assignments (1)

Priority Claims (1)

Continuity (1)

Cited By (9)

US 12,403,575 US 12,434,367 US 12,459,091 US 12,472,610 US 12,502,755 US 12,515,303 US 12,521,854 US 12,533,778 US 12,636,765