초록 ▼

A power source and a human contacting portion of a portable power tool, with a vibration-proof member and a spacer placed between them, are tightened by fastening and connecting means in the direction approaching each other. The spacer serves to limit compressive power of the vibration proof member

A power source and a human contacting portion of a portable power tool, with a vibration-proof member and a spacer placed between them, are tightened by fastening and connecting means in the direction approaching each other. The spacer serves to limit compressive power of the vibration proof member which acts between the power source and human contacting portion within effective vibration-proof range of the vibration-proof member by utilizing the fastening and connecting means, This does not cause the vibration absorbing effect of the vibration-proof member to be lost. In addition, there is no need to check the fastening degree achieved by the fastening and connecting means, thus allowing easy attachment of the vibration-proof member thereto. Alternatively, vibration-proof members may be placed between the power source side and the working member side without spacers if the vibration proof members support the power source apart from the working member. To facilitate this construction a universal power transmission, such as a flexible shaft or coupling, is used to transmit rotation power from the power source to the working member in spite of a change in the relative positional relation of the power source to the working member, caused by the vibration-proof member.

대표청구항 ▼

[ What is claimed is:] [1.] In a portable power tool that includes a power source and a human body contacting portion, the power tool comprising:a vibration-proof member disposed between the power source and the human body contacting portion for absorbing vibration transmitted from the power source

[ What is claimed is:] [1.] In a portable power tool that includes a power source and a human body contacting portion, the power tool comprising:a vibration-proof member disposed between the power source and the human body contacting portion for absorbing vibration transmitted from the power source side to the human body contacting portion side, the vibration-proof member having a compressive power that is effective within a known range for absorbing vibration transmitted from the power source side to the human body contacting portion side;means for fastening and connecting the power source and the human body contacting portion to one another; anda spacer for limiting the vibration-proof member's compressive power which acts between the power source side and the human contacting portion side to an amount within the effective vibration-proof range by using the fastening and connecting means.