초록 ▼

Disclosed is a drilling and/or striking hammer that includes a lubricating device having a lubricant reservoir and a volume of lubricant contained therein. The lubricating device conveys lubricant to at least one a transmission system within the hammer's housing, a percussion system, and/or a tool h

Disclosed is a drilling and/or striking hammer that includes a lubricating device having a lubricant reservoir and a volume of lubricant contained therein. The lubricating device conveys lubricant to at least one a transmission system within the hammer's housing, a percussion system, and/or a tool holder at a variable dosing or flow rate. The dosing or flow rate varies as a function of tool stress which can include use intensity and/or temperature. A flexible tube extends between the reservoir and the lubricated component(s). At lease part of the flexible tube vibrates with the lubricated components during use and modifies a viscosity of the lubricant therein, based on tool use intensity. A pressure generating device can pressurize the lubricant, helping convey the lubricant to a targeted area for lubricating movable parts.

대표청구항 ▼

The invention claimed is: 1. A handheld drilling and/or striking hammer, comprising:a tool holder;a percussion mechanism that acts on a tool that is held in the tool holder;a housing connected to and extending away from the percussion mechanism;a transmission that drives the percussion mechanism to

The invention claimed is: 1. A handheld drilling and/or striking hammer, comprising:a tool holder;a percussion mechanism that acts on a tool that is held in the tool holder;a housing connected to and extending away from the percussion mechanism;a transmission that drives the percussion mechanism to reciprocate and that is at least partially enclosed by the housing;a hood that covers the housing, defining a void space therebetween;a vibration damping system extending between and connecting the hood and the housing, while permitting the hood and the housing to move with respect to each other,a lubricating device that lubricates at a portion of at least one of i) the percussion mechanism, ii) the transmission, and iii) the tool holder and that includes,a reservoir holding a volume of lubricant therein and being attached to the hood;a flexible tube extending between the reservoir and the housing and directing lubricant therebetween at a variable flow rate, the flexible tube being constructed and positioned so as to flex while the hood and housing move with respect to each other so as to impart shear forces in lubricant in the tube that reduce the lubricant's viscosity to automatically vary the lubricant flow rate from the reservoir to the housing as a function of tool stress.