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Hand-held grinding machine

An abrasive belt grinding, hand-held technology, used in abrasive belt grinders, portable grinding machines, grinding/polishing equipment, etc., can solve the problems of shortened life of abrasive belts and drive wheels, side sliding out, and high cost. Achieve the effect of saving purchase and installation, increasing grinding allowance and light weight

Inactive Publication Date: 2004-08-11
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to heat and slippage, the inner surface of the abrasive belt becomes more and more slippery, thereby reducing the life of the abrasive belt and the drive wheel
[0006] In addition, on the known hand-held abrasive belt grinders, it is necessary to use a high-cost adjusting device to make the force-transmitting belt be guided and circulated relative to the drive wheel or the guide wheel. Guide wheel slides out sideways

Method used

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Examples

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Embodiment Construction

[0026] figure 1 The shown side view of a hand-held belt grinder 10 shows its housing 11 and a rear handle 12 with a switch button 14 and a front handle 13 . Furthermore, guide and drive toothed pulleys 22 , 23 arranged below the hand-held belt grinder 10 and which carry an endless toothed belt 21 in circulation can be seen.

[0027] The endless toothed belt 21 has small sticky hooks 31 on its side facing away from the teeth 21, which catch the velvet layer 32 on the back side of the abrasive belt 24, ie the opposite side of the abrasive layer 30 (FIG. 7). The hook / velvet system 31 , 32 fixes the sanding belt 24 on the endless toothed belt 21 against relative movement. The endless toothed belt forms a positive connection when its teeth 219 engage in corresponding teeth 230 of the guide and drive wheels 22 , 23 and therefore only slips to a minimum.

[0028] The abrasive belt 24 and the endless toothed belt 21 are supported with their rear sides on a shoe 33, so that the abras...

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PUM

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Abstract

A power belt sander (10) with a housing (11), which contains means for driving a sanding belt (24) which can be continuously guided by means of a drive roller (23), preferably also by means of a deflection roller (22), is less costly, lighter in weight, and more efficient due to the fact that the sanding belt (24) is supported by a toothed sanding belt (21), wherein the toothed sanding belt (21) is oriented with its toothed side (25) toward the drive roller (23), preferably the guide roller (22).

Description

technical field [0001] The invention relates to a hand-held abrasive belt grinder. Background technique [0002] A hand-held abrasive belt grinder of the stated type is known from GB 2 293 122, in which the transmission of force is made from the electric motor via the drive wheel to an abrasive belt which is guided parallel to and spaced from the drive wheel. round cycle. A force-transmitting connection is formed between the inner surface of the abrasive belt and between the guide wheel and the drive wheel. [0003] In order to ensure the connection that forms the power transmission chain between the abrasive belt and the drive wheel, the abrasive belt running around the drive wheel must be preloaded on it with a required minimum force. This is achieved in that the guide wheels are mounted elastically displaceably and pressed against the abrasive belt from the inside. Tension elements are required for this purpose, which try to press the deflection wheel elastically away ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B21/06B24B21/12B24B23/06B24D11/00
CPCB24B21/12B24D11/00B24B23/06
Inventor 斯特芬·温施
Owner ROBERT BOSCH GMBH
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