Vibration suppression bar handle structures for high-vibration handheld machines

A handle structure for vibration suppression comprising:

• a handle comprising a first leg and a second leg;
• a first vibration suppression system connected to the first leg, wherein the first vibration suppression system comprises:
• a first support member,
• a second support member rotatably connected to the first support member at a first joint, and
• a first resilient member rotatably connected to the first support member at a second joint and to the second support member at a third joint;
• and
• a second vibration suppression system connected to the second leg, wherein the second vibration suppression system comprises:
• a third support member,
• a fourth support member rotatably connected to the third support member at a fourth joint, and
• a second resilient member rotatably connected to the third support member at a fifth joint and to the fourth support member at a sixth joint.

A jackhammer comprising:

• a body;
• and
• a handle structure connected to the body, wherein the handle structure includes:
• a handle comprising a first leg and a second leg, wherein the handle is configured to translate relative to the body along a first axis,
• a first vibration suppression system connected to the first leg, wherein the first vibration suppression system comprises a first plurality of support members and a first plurality of resilient members, and wherein the first plurality of support members and the first plurality of resilient members are arranged such that the first vibration suppression system is configured to exhibit quasi-zero stiffness during operation of the jackhammer, and
• a second vibration suppression system connected to the second leg, wherein the second vibration suppression system comprises a second plurality of support members and a second plurality of resilient members, and wherein the second plurality of support members and the second plurality of resilient members are arranged such that the second vibration suppression system is configured to exhibit quasi-zero stiffness during operation of the jackhammer.