KR101594594B1 - Valves for air tools - Google Patents

Valves for air tools Download PDF

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Publication number
KR101594594B1
KR101594594B1 KR1020140177656A KR20140177656A KR101594594B1 KR 101594594 B1 KR101594594 B1 KR 101594594B1 KR 1020140177656 A KR1020140177656 A KR 1020140177656A KR 20140177656 A KR20140177656 A KR 20140177656A KR 101594594 B1 KR101594594 B1 KR 101594594B1
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KR
South Korea
Prior art keywords
air
pair
molding
opening
closing member
Prior art date
Application number
KR1020140177656A
Other languages
Korean (ko)
Inventor
오승준
Original Assignee
양산기공 주식회사
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Filing date
Publication date
Application filed by 양산기공 주식회사 filed Critical 양산기공 주식회사
Priority to KR1020140177656A priority Critical patent/KR101594594B1/en
Application granted granted Critical
Publication of KR101594594B1 publication Critical patent/KR101594594B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/28—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with resilient valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle

Abstract

The present invention provides an air purifier comprising: an air supply unit; An open / close control unit for controlling supply or blocking of air introduced through the air supply unit; And a valve body that connects between the driving unit and the air supply unit so as to supply the air adjusted by the opening / closing control unit to the driving unit, wherein the opening / Wherein the valve rotates around a rotation axis, the valve comprising: a disk-shaped elastic opening and closing member having a pair of air inflow holes; A disk-shaped molding coupling portion coupled to the inside of the elastic opening and closing member and having a pair of inflow hole depressions recessed inward corresponding to the pair of air inlet holes; And a coupling shaft for coupling with the valve main body. As a result, the contact area between the molding coupling portion and the elastic opening and closing member is increased, and the elastic opening and closing member is prevented from departing from the molding engagement portion under a high-pressure air atmosphere.

Description

Valves for air tools

The present invention relates to an air tool valve, and more particularly, to an air tool valve for increasing the contact area between a molding engagement portion and an elastic opening and closing member and preventing the elastic opening and closing member from departing from a molding engagement portion under a high- .

Generally, air tools use compressed air supplied at a high pressure from an external compressor to rotate the tool chuck coupled to the shaft and the tip of the shaft, or to perform a necessary operation by driving the piston to strike, There are air grinders and air chipping machines. Such air tools are widely used in various industrial fields such as automatic assembly or disassembly of bolt-nuts in various production lines, surface machining of metal, wood or plastic castings, cutting, and hole generation.

The basic structure of the air tool includes a valve and a valve body for supplying or blocking air introduced into the tool body from the outside through the air supply portion, a rotor rotating or driven by the air introduced through the valve, A cylinder including the rotor or the piston therein, and an opening / closing handle for allowing the user to adjust the supply and interruption of air into the cylinder.

The valve for controlling supply and interruption of air into the cylinder may include a disc-shaped elastic opening / closing member for separating a space between the air supply unit and the cylinder, a molding coupling unit for coupling with the molding member, And an insert member including an engagement shaft engaged with the valve body and the opening and closing handle. In the molding member, a pair of air inflow holes are formed so that the air supplied from the air supply portion is supplied into the cylinder through the molding member, and the air inflow hole is controlled to be opened and closed through the opening / closing handle.

Since the pair of air inflow holes are formed in the molding member, the conventional molding engaging portion coupled with the molding member has a rectangular shape so as not to block the pair of air inflow holes. However, if an insert member including a rectangular conventional molding engagement portion is used, there is a problem that the contact area between the molding engagement portion and the molding member is small and the molding member is peeled off from the molding engagement portion when the high pressure air is injected.

Korea Intellectual Property Office Published Utility Model No. 20-2013-0001953

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an air tool valve that increases the contact area between the molding engagement portion and the elastic opening and closing member to prevent the elastic opening and closing member from being released from the molding engagement portion under a high pressure air atmosphere.

The above-mentioned object is achieved by an air supply apparatus comprising: an air supply unit; An open / close control unit for controlling supply or blocking of air introduced through the air supply unit; And a valve body that connects between the driving unit and the air supply unit so as to supply the air adjusted by the opening / closing control unit to the driving unit, wherein the opening / Wherein the valve rotates around a rotation axis, the valve comprising: a disk-shaped elastic opening and closing member having a pair of air inflow holes; A disk-shaped molding coupling portion coupled to the inside of the elastic opening and closing member and having a pair of inflow hole depressions recessed inward corresponding to the pair of air inlet holes; And an engagement shaft engaged with the valve body.

The molding engagement portion includes a pair of second depressions that are recessed inward to face each other on an outer peripheral surface between a pair of the inflow hole depressions, And a plurality of curved protrusions formed between the depressions and curved toward the inflow hole.

Preferably, the second depression includes a radial projection protruding radially from the center, the molding part is molded from a rubber material, and the insert member is formed of a metal material desirable.

According to the structure of the present invention described above, it is possible to obtain an effect of increasing the contact area between the molding engagement portion and the elastic opening and closing member and preventing the elastic opening and closing member from being separated from the molding engagement portion under a high-pressure air atmosphere.

1 is an exploded perspective view of a conventional air tool,
2 is a perspective view of an air tool valve according to a first embodiment of the present invention,
3A to 3C are sectional views of valves according to first to third embodiments of the present invention.

Hereinafter, an air tool according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is an exploded perspective view of an air grinder 100 of an air tool. In addition to the air grinder 100, the valve 190 of the present invention is also applicable to an air chipping machine.

The air grinder 100 includes an air supply unit 110, an open / close control unit 130 for controlling the supply or cutoff of air, a driving unit 150, and a valve (not shown) for connecting the driving unit 150 and the air supply unit 110 A body 170 and a valve 190 formed in the valve body 170.

The air supply unit 110 serves to supply air to the driving unit 150, which ultimately drives the air introduced from the outside. The air introduced from the outside through the air supply unit 110 is supplied to the valve body 170 connected to the air supply unit 110. The air passing through the valve body 170 is supplied to the driving unit 150, It becomes possible to operate.

The driving unit 150 includes a cylinder 151, a rotor 153, a rear plate 155, and a front plate 157 in the case of an air grinder. The cylinder 151 has an internal hollow shape so that the rotor 153 can be positioned therein, and the rotor 153 is rotatably disposed therein. The rotor 153 is a rotating body provided inside the cylinder 151, and a plurality of blades 153a are coupled to the outer circumferential surface thereof to be driven by the pressure of the introduced air.

The rear plate 155 is coupled to the outer rear side of the cylinder 151 and has a rear hole 155a through which the end of the rotor 153 is inserted. A bearing 159 capable of rotatably supporting an axial end portion of the bearing 153 is inserted.

The front plate 157 is coupled to the front outside of the cylinder 151 and is formed with a front hole 157a through which the end of the rotor 153 can be inserted and air is exhausted. Here, an inner space is formed in the front plate 157, and a bearing 159 for rotatably supporting the shaft end portion of the rotor 153 is inserted.

Such a structure is the case of an air grinder, and in the case of an air chipping device, a piston and a piston rod are disposed inside the cylinder, and the striking drive is performed by the air pressure.

The valve body 170 for supplying air to the driving unit 150 is provided with a valve 190 for supplying or blocking air to and from the driving unit 150. The valve body 190 is provided with an opening / (130) is installed. The valve 190, the valve body 170 and the opening / closing control part 130 are coupled by the spring pin 171. When the user operates the opening control part 130 from the outside, The connected valve 190 rotates to supply or block the roll air of the driving unit 150.

The valve 190, which rotates about the rotation axis so as to supply or shut off the air, includes an insert member 191 and an elastic opening and closing member 193. The insert member 191 includes a disk-shaped molding coupling portion 195 coupled to the inside of the elastic opening and closing member 193, a coupling shaft 195 projecting from the molding coupling portion 195 along the rotation axis, 197).

The elastic opening and closing member 195 is formed in a disk shape having a pair of air inflow holes 193a and a molding engagement portion 195 of the insert member 191 is formed therein. The elastic opening and closing member 193 is molded by forming a pair of air inflow holes 193a so as to be able to supply air. The molding opening 195 corresponds to a pair of air inflow holes 193a, A pair of inflow hole dimples 195a are formed.

The coupling shaft projecting from the molding coupling portion 195 along the rotation axis and engaged with the valve body 170 is integrally formed with the molding coupling portion 195. The coupling shaft 197 rotated by the opening and closing part 130 is formed with a pin hole 197a in which the spring pin 171 can be installed to be engaged with the valve body 170 by the spring pin 171.

It is preferable that the elastic opening and closing member 193 is molded from a rubber material and the insert member 191 is formed of a metal material.

2 and 3A show a molding coupling part 195 and an elastic opening and closing member 193 according to the first embodiment. In the molding coupling part 195, a pair of inflow holes 193a corresponding to the air inflow hole 193a are formed. And includes a pair of second depressed portions 195b that are depressed at the center so as to face each other on the outer peripheral surface between the inflow hole depressions 195a. A plurality of curved protrusions 195c bent in the direction of the inflow hole dimple 195a are formed between the inflow hole dimple 195a and the second dimple 195b. In addition to this, a pair of radial projections 195d radially projecting from the center of the rotary shaft is formed between the curve projection 195c formed in the second depression 195b.

With this structure, the contact area between the molding coupling portion 195 and the elastic opening and closing member 193 is increased, and the elastic contact and opening member 193 is stably Can be combined.

3B shows the molding engagement portion 395 and the elastic opening and closing member 293 according to the second embodiment, and there is a difference in the shape of the molding engagement portion 295 of the insert member 291. FIG. The molding engagement portion 295 of the second embodiment includes a pair of inflow hole depressions 295a and a pair of second depressions 295b and the inflow hole depression 295a and the second depression 295b A plurality of curve projections 295c bent in the direction of the inflow hole depression 295a are formed. In some cases, the curve projecting portion 295c may be formed in a radial direction without being bent in the direction of the inflow hole depression 295a. In this case, unlike the first embodiment, since there is no radial projection, the cross-sectional area of the curve projection 295c can be increased.

3C shows the insert member 391 and the elastic opening and closing member 393 according to the third embodiment. The molding member 395 is shaped like a disk and has a pair of air inflows And includes a pair of inflow hole depressions 395a that are depressed corresponding to the holes 393a. Since the disk shape is formed to have a diameter similar to the diameter of the elastic opening and closing member 393, it is more stably coupled to the elastic opening and closing member 393.

The conventional molding coupling portion has a rectangular shape with a small contact area so as not to block the air inflow hole. However, when a rectangular molding connection part is used, there is a problem that when the high pressure air is continuously introduced, the molding connection part and the elastic opening and closing member are separated. Therefore, the molding engaging portions 195, 295, and 395 of the present invention increase the contact area with the elastic opening and closing members 193, 293, and 393 and are formed to have diameters similar to the diameters of the elastic opening and closing members 193, 293, and 393 It is possible to solve the problem that the elastic opening and closing members 193, 293, 393 are separated from the molding engaging portions 195, 295, 395 by the air of high pressure.

100: air grinder 110: air supply part
130 opening / closing control unit 150 driving unit
151: cylinder 153: rotor
153a: blade 155: rear plate
155a: Rear hole 157: Front plate
157a: Front hole 159: Bearing
170: valve body 171: spring pin
190, 290, 390: valve 191: insert member
193, 293, 393: Elastic opening and closing members 193a, 293a, 393a:
195, 295, 395: Molding coupling parts 195a, 295a, 395a:
195b, 295b, 395b: second depression portions 195c, 295c:
195d: Radial projection 197: Coupling axis
197a: The fin

Claims (5)

An air supply unit; An open / close control unit for controlling supply or blocking of air introduced through the air supply unit; And a valve body that connects between the driving unit and the air supply unit so as to supply the air adjusted by the opening / closing control unit to the driving unit, wherein the opening / A valve for supplying or shutting off air,
The valve, which rotates about a rotational axis,
A disk-shaped elastic opening and closing member having a pair of air inlet holes;
A disk-shaped molding coupling portion coupled to the inside of the elastic opening and closing member and having a pair of inflow hole depressions recessed inward corresponding to the pair of air inlet holes; And an insert member including an engagement shaft engaged with the valve body. The method according to claim 1,
Wherein the molding-
And a pair of second depressions that are recessed inward to face each other on an outer circumferential surface between a pair of the inflow hole depressions. 3. The method of claim 2,
Wherein the molding-
And a plurality of curved protrusions formed between the inflow hole depression and the second depression and curved toward the inflow hole depression. 3. The method of claim 2,
Wherein the second depression comprises a radial projection projecting radially from the center. The method according to claim 1,
The elastic opening and closing member is molded with a rubber material,
Wherein the insert member is formed of a metal material.
KR1020140177656A 2014-12-10 2014-12-10 Valves for air tools KR101594594B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140177656A KR101594594B1 (en) 2014-12-10 2014-12-10 Valves for air tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140177656A KR101594594B1 (en) 2014-12-10 2014-12-10 Valves for air tools

Publications (1)

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KR101594594B1 true KR101594594B1 (en) 2016-02-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200052739A (en) 2018-11-07 2020-05-15 와이엠양산기공 주식회사 switch of air tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61131569U (en) * 1985-02-05 1986-08-16
JP2004060709A (en) * 2002-07-25 2004-02-26 Yamatake Corp Lining structure of valve element
KR20090059779A (en) * 2007-12-07 2009-06-11 양산기공 주식회사 Die grinder for rotary burr
US8297374B2 (en) * 2009-02-18 2012-10-30 Nitto Kohki Co., Ltd. Rotationally driven air tool
KR20130001953A (en) 2011-06-28 2013-01-07 현대자동차주식회사 Engine cover folding device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61131569U (en) * 1985-02-05 1986-08-16
JP2004060709A (en) * 2002-07-25 2004-02-26 Yamatake Corp Lining structure of valve element
KR20090059779A (en) * 2007-12-07 2009-06-11 양산기공 주식회사 Die grinder for rotary burr
US8297374B2 (en) * 2009-02-18 2012-10-30 Nitto Kohki Co., Ltd. Rotationally driven air tool
KR20130001953A (en) 2011-06-28 2013-01-07 현대자동차주식회사 Engine cover folding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200052739A (en) 2018-11-07 2020-05-15 와이엠양산기공 주식회사 switch of air tool
KR102136368B1 (en) 2018-11-07 2020-07-21 와이엠양산기공 주식회사 switch of air tool

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