Driving work machine

A driving work machine comprising:

• a cylinder configured to apply a rotational force to a tip tool;
• a piston attached to be able to reciprocate in an axis direction inside the cylinder and configured to apply a striking force to the tip tool;
• a driving source configured to generate a power for driving the cylinder and the piston;
• a switching part configured to make switching between at least two operational states including a rotational striking state of transmitting the power as a striking force and a rotational force to the tip tool and a rotational state of transmitting the power as the rotational force but not transmitting the power as the striking force to the tip tool;
• a housing configured to house the cylinder, the driving source and the switching part;
• and
• a spring member arranged between the housing and the switching part and configured to urge the switching part to move forward,
• wherein the cylinder includes a pushing part pushing the switching part rearward when the cylinder is moved rearward by a reactive force of the pressing of the tip tool against a workpiece,
• wherein the switching part is configured to switch an operational state of the cylinder in response to the pushing part pushing the switching part,
• wherein the housing includes a preventing surface configured to prevent an amount of the rearward movement of the switching part,
• wherein the driving work machine further comprises an anti-vibration part in addition to the spring member, the anti-vibration part being arranged between the pushing part and the preventing surface,
• wherein the anti-vibration part remains between the pushing part and preventing surface when the preventing surface prevents the rearward movement of the switching part, and
• wherein the anti-vibration part is a rubber annular member fitted with an outer circumferential surface of the cylinder.

A driving work machine comprising:

• a cylinder configured to apply a rotational force to a tip tool;
• a piston attached to be able to reciprocate in an axis direction inside the cylinder and configured to apply a striking force to the tip tool;
• a driving source configured to generate a power for driving the cylinder and the piston;
• a switching part configured to make switching between at least two operational states including a rotational striking state of transmitting the power as a striking force and a rotational force to the tip tool and a rotational state of transmitting the power as the rotational force but not transmitting the power as the striking force to the tip tool;
• a housing configured to house the cylinder, the driving source and the switching part;
• and
• a spring member arranged between the housing and the switching part and configured to urge the switching part to move forward,
• wherein the cylinder includes a pushing part pushing the switching part rearward when the cylinder is moved rearward by a reactive force of the pressing of the tip tool against a workpiece,
• wherein the switching part is configured to switch an operational state of the cylinder in response to the pushing part pushing the switching part,
• wherein the housing includes a preventing surface configured to prevent an amount of the rearward movement of the switching part,
• wherein the driving work machine further comprises an anti-vibration part in addition to the spring member, the anti-vibration part being arranged between the pushing part and the preventing surface,
• wherein the anti-vibration part remains between the pushing part and preventing surface when the preventing surface prevents the rearward movement of the switching part, and
• wherein the anti-vibration part is a coil spring attached to outside of the cylinder.