Power tool with vibration dampening

摘要

A power tool includes an inner housing (50) at least partially housed within and spaced from an outer housing (30). The inner housing supports a tool (102, 302), such as a pair of shear blades, and houses a motor (80) that drives the tool. The outer housing includes a grip (14, 18) to be grasped by a user. At least one vibration insulator (71-75) can be disposed between the inner housing and the outer housing and in a manner such that the vibration insulator(s) is(are) protected by the outer housing. An intake opening (60a, 60b) and exhaust opening (64a, 64b) can be formed in the inner housing and can be shielded by respective portions of an inner surface of the outer housing.

主权项

1. A gardening trimmer configured to have a pair of shear blades detachably coupled thereto, comprising:
a prime mover configured to drive the pair of shear blades; an inner housing that houses the prime mover; an outer housing that at least partially houses the inner housing and comprises at least one grip configured to be grasped by a user; at least four vibration insulators disposed between the inner housing and the outer housing, wherein the outer housing supports the inner housing via the at least four vibration insulators; a crank member coupled to the prime mover and configured to drive the pair of shear blades, the crank member being disposed at least partially within the inner housing and being configured to convert rotation of the prime mover into reciprocating movement for the pair of shear blades; and a switch operably connected to the prime mover and configured to be operated by the user for energizing the prime mover, the switch being disposed on the outer housing, wherein the outer housing comprises a first crossbeam that extends from a first side wall of the outer housing to a second side wall of the outer housing and a second crossbeam that extends from the first side wall of the outer housing to the second side wall of the outer housing, the first crossbeam is disposed forward of a rotational axis of the crank member and the second crossbeam is disposed rearward of the rotational axis of the crank member, the inner housing comprises a first through-hole and a second through-hole, the first crossbeam of the outer housing passing through the first through-hole and the second crossbeam of the outer housing passing through the second through-hole, two of the at least four vibration insulators are respectively disposed at each respective end of the first through-hole and between the first crossbeam and the inner housing in a direction perpendicular to a center line of the first crossbeam, another two of the at least four vibration insulators are respectively disposed at each respective end of the second through-hole and between the second crossbeam and the inner housing in a direction perpendicular to a center line of the second crossbeam, wherein the inner housing does not directly contact the outer housing, the first crossbeam or the second crossbeam, and wherein the outer housing comprises at least one opening, the inner housing being exposed to the outside through the at least one opening, and the inner housing comprises at least one raised portion that protrudes at least into a respective one of the at least one opening of the outer housing.