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Sealing arrangement for tightening tool

A technology for tightening tools and sealing structures, which is applied to the sealing of engines, manufacturing tools, motor tools, etc., and can solve problems such as shortening the service life of bearings, reducing sealing performance, and damaging bearing functions

Pending Publication Date: 2021-02-05
ATLAS COPCO INDAL TECHN AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these designs suffer from various problems related to providing a proper seal between parts of the vacuum-dominated tool and other parts
Proposed solutions include the use of sealed bearings, with various disadvantages including that changing pressures (i.e. vacuum) can negatively affect the rubber seals of such bearings, thereby reducing sealing performance, and that vacuum can lead to unwanted lubrication from the bearings Migration of oil, which impairs the function of the bearing and shortens the service life of the bearing

Method used

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  • Sealing arrangement for tightening tool
  • Sealing arrangement for tightening tool
  • Sealing arrangement for tightening tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] exist figure 1 The cross-sectional view in shows a power tool 1 including a sealing structure 100 according to one embodiment. A sealing arrangement 100 is shown in the housing 10 and is adapted to seal the first section 10a at the front (or distal end) of the tightening tool 1 from the second section 10b of the tool. exist figure 1 In the illustrated embodiment of the tightening tool, a vacuum predominates in the first section 10a of the housing, i.e. a relatively low pressure, and the tool also includes internal fluid passages (not shown) for transferring the The vacuum is supplied to the front end of the tool. Therefore, at the rear end of the tool there is a vacuum connection V for connecting the tool to a vacuum source. In the second section 10b, atmospheric pressure prevails.

[0025] The sealing arrangement 100 , which is arranged on the rotational axis 40 of the tool, is shown in more detail in a perspective view. The sealing structure 100 includes a sealin...

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PUM

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Abstract

The present specification relates to a handheld electric tightening tool comprising a housing and a sealing arrangement, wherein the sealing arrangement is adapted to seal a first portion (10a) of thehousing from a second portion of the housing, and comprises a sealing element (20) and a spring (30), wherein the sealing element comprises a first portion adapted to bear against a shoulder (11) formed in the housing, and a second portion adapted to bear against a portion of an outer surface of a rotating axle (40) of the tool, and wherein the spring is adapted to at a first end bear against a shoulder formed in the sealing element and at a second end bear against a supporting element (42) arranged on the axle, such that a force is exerted on the sealing element urging the sealing element against the shoulder formed in the housing.

Description

technical field [0001] The present invention relates generally to power tools for tightening screws, and more particularly, to a power tightening tool including a housing and a sealing structure adapted to receive from a second section of the housing. The first section of the housing is sealed. Background technique [0002] Power tools for tightening are known to be used in various industries. For example, in the electronics industry, tightening tools are used to tighten small screws. Such tools often include mechanisms to facilitate the picking and holding of the in many cases very small screws used. Examples of such mechanisms include various vacuum solutions where a vacuum is provided at the front of the tool so that small screws can be sucked into place on the tool head or similar. [0003] More specifically, so-called vacuum adapters are known, the vacuum being provided by means of an auxiliary adapter attached to the front end of the tool, wherein the vacuum is usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B21/00B25B23/08
CPCB25B21/00B25B23/08B25F5/00F16J15/16F16J15/32B23P19/06B25B21/007B25F5/02F16J15/3204
Inventor U·M·埃里克松
Owner ATLAS COPCO INDAL TECHN AB