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GB2435235A - Waterproof air cooling system for power tool - Google Patents

Waterproof air cooling system for power tool Download PDF

Info

Publication number
GB2435235A
GB2435235A GB0702585A GB0702585A GB2435235A GB 2435235 A GB2435235 A GB 2435235A GB 0702585 A GB0702585 A GB 0702585A GB 0702585 A GB0702585 A GB 0702585A GB 2435235 A GB2435235 A GB 2435235A
Authority
GB
United Kingdom
Prior art keywords
air
cooling system
guiding
guiding plate
ventilation passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0702585A
Other versions
GB0702585D0 (en
Inventor
Yasheng Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chevron HK Ltd
Original Assignee
Chevron HK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chevron HK Ltd filed Critical Chevron HK Ltd
Priority to GB0702585A priority Critical patent/GB2435235A/en
Publication of GB0702585D0 publication Critical patent/GB0702585D0/en
Publication of GB2435235A publication Critical patent/GB2435235A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/02—Devices for lubricating or cooling circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/008—Cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/02—Accessories specially adapted for use with machines or devices of the preceding groups for removing or laying dust, e.g. by spraying liquids; for cooling work
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/26—Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H02K7/145—Hand-held machine tool
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Sawing (AREA)

Abstract

A power tool air cooling system comprises a fan, an air inlet (1, fig. 1) and an air outlet (2, fig. 1), wherein one of the air inlet (1, fig. 1) and air outlet (2, fig 1) incorporates a waterproof filter 9 and the other incorporates an air-guiding plate 5 and an air-guiding cover 6 which together define a ventilation passage therebetween. Ends of the air-guiding plate 5 and cover 6 are curved and thus the open end of the ventilation passage is bent. Water, such as that used for cooling the cutting tool, is prevented from entering the power tool and reaching its motor through the filter 9 and also through the ventilation passage as a consequence of the bend therein. The figures show an electric circular saw comprising the air cooling system, with the waterproof filter 9 in the air inlet (1, fig. 1) and the bent ventilation passage at the air outlet (2, fig. 1).

Description

<p>* 2435235</p>
<p>COOLING SYSTEM FOR POWER TOOLS</p>
<p>FIELD OF THE INVENTION</p>
<p>The present invention relates to a cooling system for power tools, and more particularly to such a cooling system having a waterproof structure.</p>
<p>BACKGROUND OF THE INVENTION</p>
<p>A conventional power tool is commonly arranged with a set of cooling system for cooling a motor of the power tool, and the cooling system includes an air inlet, a fan and an air outlet. However, the conventional cooling system does not have a waterproof function, or can not meet the requirement of a waterproof function well.</p>
<p>When water is used to cool cutting tools during cutting operation of some power tools, water will enter into the interior of the power tool, which may impact operation or cause permanent damage to the power tool The power tool, such as a tile cutter, needs to be continuously cooled by water to cool the cutting blade and the cutting surface thereof during operation, and therefore the water can easily enter the interior of the housing, and consequently affects nonnal use of the tool. Even if for the power tool which does not need to be cooled by water, water may enter the interior of the motor thereof due to rain or snow weather when being operated out-of-doors.</p>
<p>SUMMARY OF THE INVENTION</p>
<p>An object of the present invention is to provide a cooling system for power tools which has a waterproof function, simple in structure and reliable in fimction.</p>
<p>To obtain the above-mentioned object, a cooling system for power tools disclosed by the present invention including, a fan, an air inlet, and an air outlet, the air inlet includes a waterproof member, the air outlet includes a air-guiding plate and a air-guiding cover, and the top portions of the air-guiding plate and the air-guiding cover being curved.</p>
<p>The advantages of the present invention are as follows: the cooling system has a waterproof function, and may guide water to flow in a reverse direction, with simple structure and reliable function.</p>
<p>DESCRIPTION OF THE DRAWING</p>
<p>The detailed description of the present invention will be further illustrated accompany with drawings, wherein Fig. I is a perspective view of an electric circular saw with a cooling system according to a preferred embodiment of the present invention; Fig. 2 is an exploded view of the electric circular saw of Fig. 1; Fig. 3 is a cross-sectional view of the electric circular saw of Fig. 1; Fig. 4 is a schematic diagram showing the working principle of the air outlet of the electric circular saw of Fig. 1.</p>
<p>DETAILED DESCRIPTION OF THE JNVENTION:</p>
<p>Referring to Figs. 1-3, a cooling systcm for an electric circular saw 100 comprises a fan 12, an air inlet 1, and an air outlet 2, the air inlet I comprises a waterproof member 9, the air outlet 2 comprises an air-guiding plate 5 and an air-guiding cover 6, which define a ventilation passage 20 therebetween, and open end of the passage 20 bends downwardly. In this preferred embodiment a top portion 51 of the air-guiding plate S and a top portion 61 of the air-guiding cover 6 are both formed with an arc surface along the ventilation passage 20. Seal rings 4 hold the air-guiding plate 5 and the air-guiding cover 6 between a gear box 3 and a motor housing 8. Preferably, the air-guiding plate 5 has a plurality of air-guiding vanes 52 for facilitating air exhaust from the air outlet 2. The air inlet I is disposed adjacent a tail portion 10 of the motor housing of the electric circular saw 100. The waterproof member 9 is a waterproof filter device, so that water is prevented from entering an inner component 7 of the electric circular saw 100 from the air inlet I. The waterproof member is widely used and well known in the mechanical field, so the filter device of the present invention is not limited to the structure described above and shown in the drawings, other structures known by persons skilled in the mechanical field may also available.</p>
<p>Fig. 4 shows a working principle diagram of the air outlet 2 of the electric circular saw 100. When the electric circular saw 100 is normally working, the fan 12 is activated to cool the motor 14 of the electric circular saw 100, and thereby heated air is blown out along the ventilation passage 20 between the air-guiding plate 5 and the airguiding cover 6. When water drops adjacent the air outlet 2, the top portions of the air-guiding plate 5 and the air-guiding cover 6 may guide the water in a reverse direction along the curved surfaces thereof, so that the water can not enter the electric circular saw 100 and influence to nonnal use of the machine is avoided.</p>
<p>According to the present invention, the top portions of the air-guiding plate 5 and the air-guiding cover 6 are both formed with an arc surface, which is a pTeferred embodiment of the present invention. The present invention may have the top portions of the air-guiding plate 5 and the air-guiding cover 6 with other curved surfaces, and the structures which can obtain the same object of the present invention are also be protected by the present invention.</p>
<p>The present invention is not limited to the above-mentioned embodiment It is obvious and easily understood for a person skilled in the art that the cooling system of the present invention may have various modifications or alternatives without departing from the principlo and conccption of the present invention. The protection scope of the present invention is defined by the appended claims.</p>

Claims (1)

  1. <p>WHAT! CLAIMED IS: 1. A cooling system for power tools, comprising: a
    fan, an air inlet, an air outlet, one of the air inlet and the air outlet comprises a waterproof member, the other comprises an air-guiding plate and an air-guiding cover, wherein the top portions of the air-guiding plate and the air-guiding cover are both curved, a ventilation passage is defined between the air-guiding plate and the air-guiding cover with open end thereof being bent downwardly.</p>
    <p>2. The cooling system for power tools as claimed in claim 1, characterized in that: the top portion of the air-guiding cover is fonned with an are surface along the ventilation passage.</p>
    <p>3. The cooling system for power tools as claimed in claim 2, characterized in that: the air-guiding plate and the air-guiding cover is held between a gear box and a motor housing by at least one seal ring.</p>
    <p>4. The cooling system for power tools as claimed in claim 1, characterized in that: the air-guiding plate is provided with a plurality of air-guiding vanes.</p>
GB0702585A 2007-02-09 2007-02-09 Waterproof air cooling system for power tool Withdrawn GB2435235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0702585A GB2435235A (en) 2007-02-09 2007-02-09 Waterproof air cooling system for power tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0702585A GB2435235A (en) 2007-02-09 2007-02-09 Waterproof air cooling system for power tool

Publications (2)

Publication Number Publication Date
GB0702585D0 GB0702585D0 (en) 2007-03-21
GB2435235A true GB2435235A (en) 2007-08-22

Family

ID=37903504

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0702585A Withdrawn GB2435235A (en) 2007-02-09 2007-02-09 Waterproof air cooling system for power tool

Country Status (1)

Country Link
GB (1) GB2435235A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103256116A (en) * 2012-02-17 2013-08-21 本田技研工业株式会社 Engine-driven power generator apparatus
EP2535150A3 (en) * 2011-06-15 2015-10-07 Makita Corporation Impact tool
EP3859949A1 (en) * 2020-01-31 2021-08-04 System Cleaners A/S System for cooling a low pressure cleaner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1388085A (en) * 1972-03-22 1975-03-19 Rockwell International Corp Power tools
DE2617860A1 (en) * 1976-04-23 1977-11-03 Flux Geraete Gmbh Double insulated pump motor with spray protection - has labyrinth of air channels on both upper and flange sides so that air stream is diverted at least 180 degrees
GB2062361A (en) * 1979-11-02 1981-05-20 Hilti Ag Drilling tool
GB2112585A (en) * 1981-12-29 1983-07-20 Foell Remswerk An electrically driven machine for processing rods, tubes and the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1388085A (en) * 1972-03-22 1975-03-19 Rockwell International Corp Power tools
DE2617860A1 (en) * 1976-04-23 1977-11-03 Flux Geraete Gmbh Double insulated pump motor with spray protection - has labyrinth of air channels on both upper and flange sides so that air stream is diverted at least 180 degrees
GB2062361A (en) * 1979-11-02 1981-05-20 Hilti Ag Drilling tool
GB2112585A (en) * 1981-12-29 1983-07-20 Foell Remswerk An electrically driven machine for processing rods, tubes and the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2535150A3 (en) * 2011-06-15 2015-10-07 Makita Corporation Impact tool
CN103256116A (en) * 2012-02-17 2013-08-21 本田技研工业株式会社 Engine-driven power generator apparatus
CN103256116B (en) * 2012-02-17 2015-03-25 本田技研工业株式会社 Engine-driven power generator apparatus
EP3859949A1 (en) * 2020-01-31 2021-08-04 System Cleaners A/S System for cooling a low pressure cleaner

Also Published As

Publication number Publication date
GB0702585D0 (en) 2007-03-21

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)