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Power tool having lubricant leakage preventing structure

A technology for power tools and lubricants, applied in the field of power tools, can solve problems such as increasing pressure

Active Publication Date: 2010-05-05
KOKI HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the heat generated due to high-speed reciprocating motion significantly increases the pressure in the mechanism box

Method used

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  • Power tool having lubricant leakage preventing structure
  • Power tool having lubricant leakage preventing structure
  • Power tool having lubricant leakage preventing structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The following will refer to Figures 1 to 3 A power tool according to a first embodiment of the present invention will be described. Such as figure 1 As shown, the power tool is a hammer drill 1 comprising a handle portion 10, a motor housing 20 and a gear housing 30, which form a housing.

[0020] A cable 11 is connected to the handle part 10 and a switch mechanism (not shown) is incorporated into the handle part 10 . A user operated trigger 12 is mechanically connected to the switch mechanism. Cable 11 connects the switching mechanism to an external power supply (not shown). The user operates the trigger 12 to connect or cut off the connection between the switch mechanism and the power supply equipment.

[0021] The motor housing 20 is disposed above the handle portion 10 . The handle part 10 and the motor housing 20 are integrally formed of plastic material. An electric motor (not shown) is accommodated in the motor housing 20 . The motor housing 20 has an out...

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PUM

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Abstract

A power tool suppressing expansion of the air in a chamber and preventing lubricant encapsulated in the chamber from being leaked outside of the chamber. A communication portion communicates a speed reduction chamber with a motor housing communicating with an atmosphere. A communication passage forming component made from an elastic material is fittingly inserted into the communication portion which forms a communication passage including a plurality of impediment portions. When the air containing lubrication component is passed through the communication passage, the air collides against the impediment portions, allowing grease component to be adhered to the impediment portions.

Description

technical field [0001] The present invention relates to a power tool having a mechanism for transmitting rotation of an electric motor, and more particularly to such a power tool having a structure for preventing leakage of lubricant. Background technique [0002] Electric motors are housed within the housing of power tools such as hammer drills. A cylinder driven by an electric motor is rotatably supported at the front end of the housing, and an end tool is connected to the front end of the cylinder. In addition, a reduction mechanism is provided inside the housing. The rotation of the electric motor is transmitted to the end tool through this reduction mechanism. [0003] The speed reduction mechanism is accommodated in a mechanism case defined by the housing, and has a rotation transmission mechanism including gears and an intermediate shaft. The rotation of the electric motor is transmitted through gears to the intermediate shaft and then to the end tooling. Bearings...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25D16/00B23B45/16B25D17/26B25F5/02
Inventor 大久保贵启
Owner KOKI HLDG CO LTD