IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0168580
(2008-07-07)
|
등록번호 |
US-7814986
(2010-11-08)
|
우선권정보 |
GB-0613321.9(2006-07-01); GB-0613181.7(2006-07-05); GB-0613323.5(2006-07-05) |
발명자
/ 주소 |
- Berghauser, Ulrich
- Friedrich, Andreas
- Frantisek, Harcar
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
56 |
초록
▼
A powered hammer includes a housing, a tool holder coupled to the housing and configured to hold a tool, a motor within the housing, a cylinder disposed within the housing, and a piston slideably mounted within the cylinder. A drive mechanism converts rotary output of the motor into a reciprocating
A powered hammer includes a housing, a tool holder coupled to the housing and configured to hold a tool, a motor within the housing, a cylinder disposed within the housing, and a piston slideably mounted within the cylinder. A drive mechanism converts rotary output of the motor into a reciprocating motion of the piston. The drive mechanism includes a crank shaft rotationally driven by the motor, a drive pin eccentrically mounted on the crank shaft, and a con rod with a first end connected to the drive pin and a second end connected to the piston. A ram is slideably mounted forward of the piston that is reciprocatingly driven by the piston. A beat piece is slideably mounted forward of the ram. The beat piece is repetitively struck by the reciprocating ram, which in turn repetitively strikes an end of the tool when held in the tool holder to transfer the momentum of the ram to the tool. Lubrication fluid covers at least part of the drive mechanism. A rear piston chamber is formed within an end of the cylinder, rearward of the piston, the volume of which repetitively changes as the piston moves within the cylinder, causing air within the housing to be at least one of drawn into and blown out of the rear piston chamber. The movement of air causes the lubrication fluid to move within the housing. A longitudinal passageway defined in at least one of the crank shaft and the drive pin enables passage of air and the lubricating fluid to assist in movement of the lubrication fluid within the housing.
대표청구항
▼
The invention claimed is: 1. A powered hammer comprising: a housing; a tool holder coupled to the housing and configured to hold a tool; a motor within the housing; a cylinder disposed within the housing; a piston slideably mounted within the cylinder; a drive mechanism that converts rotary output
The invention claimed is: 1. A powered hammer comprising: a housing; a tool holder coupled to the housing and configured to hold a tool; a motor within the housing; a cylinder disposed within the housing; a piston slideably mounted within the cylinder; a drive mechanism that converts rotary output of the motor into a reciprocating motion of the piston; a ram slideably mounted forward of the piston that is reciprocatingly driven by the piston; a beat piece slideably mounted forward of the ram, the beat piece being repetitively struck by the reciprocating ram and which in turn repetitively strikes an end of the tool when held in the tool holder to transfer energy of the ram to the tool; lubrication fluid disposed in the housing; a rear piston chamber formed within an end of the cylinder, rearward of the piston, the volume of which repetitively changes as the piston moves within the cylinder, causing air within the housing to be at least one of drawn into and blown out of the rear piston chamber, the movement of air at least in part causing the lubrication fluid to move within the housing; and a passageway defined in the drive mechanism and configured to enable passage of the lubrication fluid to assist in movement of the lubrication fluid within the housing. 2. The powered hammer of claim 1, wherein the drive mechanism includes a crank shaft rotationally driven by the motor. 3. The powered hammer of claim 2, wherein the drive mechanism further includes a drive pin eccentrically driven by the crank shaft. 4. The powered hammer of claim 3, wherein the drive mechanism further includes a connecting rod with a first end connected to the drive pin and a second end connected to the piston. 5. The powered hammer of claim 4, wherein the passageway is defined in at least one of the crank shaft and the drive pin. 6. The powered hammer of claim 5, wherein the connecting rod is connected to the drive pin via a bearing, and further comprising a crank shaft fluid guide connected to an end of the passageway to direct the lubricating fluid towards the bearing when the lubricating fluid exits the passageway. 7. The powered hammer of claim 6, further comprising a guide mechanism, wherein the crank shaft fluid guide directs lubricating fluid toward the guide mechanism. 8. The powered hammer of claim 7, wherein the movement of the lubricating fluid from the crank shaft fluid guide to the guide mechanism is at least partially due to the movement of air within the housing. 9. The powered hammer of claim 7, wherein the movement of the lubricating fluid from the crank shaft guide to the guide mechanism is at least partially due to a force acting on that lubrication fluid generated by the rotation of the crank shaft. 10. The powered hammer of claim 7, wherein the guide mechanism comprises a groove formed in a support structure. 11. A powered hammer comprising: a housing; a tool holder coupled to the housing and configured to hold a tool; a motor within the housing; a cylinder disposed within the housing; a piston slideably mounted within the cylinder; a drive mechanism that converts rotary output of the motor into a reciprocating motion of the piston, the drive mechanism including a crank shaft rotationally driven by the motor, a drive pin eccentrically mounted on the crank shaft via a support structure, and a connecting rod with a first end connected to the drive pin and a second end connected to the piston; a ram slideably mounted forward of the piston that is reciprocatingly driven by the piston; a beat piece slideably mounted forward of the ram, the beat piece being repetitively struck by the reciprocating ram and which in turn repetitively strikes an end of the tool when held in the tool holder to transfer the momentum of the ram to the tool lubrication fluid disposed within the housing; a rear piston chamber formed within an end of the cylinder, rearward of the piston, the volume of which repetitively changes as the piston moves within the cylinder, causing air within the housing to be at least one of drawn into and blown out of the rear piston chamber, the movement of air at least in part causing the lubrication fluid to move within the housing; and a channel disposed within the housing and configured to enable passage of the lubrication fluid to assist in movement of the lubrication fluid within the housing. 12. The powered hammer of claim 11, wherein the channel comprises a passageway defined in the crank shaft. 13. The powered hammer of claim 11, wherein the channel comprises a passageway defined in the drive pin. 14. The powered hammer of claim 11, wherein the channel comprises a groove defined in the support structure. 15. The powered hammer of claim 11, wherein the channel comprises a passageway defined in at least one of the crank shaft and the drive pin, and a groove defined in the support structure. 16. The powered hammer of claim 11, wherein movement of the lubrication fluid within the housing is at least in part caused by force generated by rotation of the drive shaft.
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