CN2351598Y

CN2351598Y - Air motor

Info

Publication number: CN2351598Y
Application number: CN98208471U
Authority: CN
Inventors: 郑相建
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-23
Filing date: 1998-04-09
Publication date: 1999-12-01
Anticipated expiration: 2008-04-09
Also published as: KR200185309Y1; KR19980063966U; TW352796U

Abstract

The utility model relates to an air motor for a driving device of a pneumatic grinding mill in industries. Two grooves are formed along the circumferential surface of a through hole of a bearing box which is communicated with an air supply passage on the bearing box and are corresponding to the lowest end of a rotor elongated groove which is inserted with blades, and a plurality of shaft bearings, such as two, are arranged and used for supporting rotating shafts. The utility model shortens the reaching time of the pneumatic power in the maximum number of rotating, maintains a certain rotating numbers of the air motor, quickly discharges the air used for rotating a rotor into atmosphere, and prevents the rotating shaft from the eccentricity.

Description

The gas motor

The utility model relates to a kind of gas motor as industrial air pressure lapping machine driving arrangement, especially relates to a kind of through hole from bearing housing and forms elongated slot and make the gas motor of a plurality of blade emersions that insert the rotor elongated slot along the circumferential surface of bearing housing.

The gas motor can be used for grinding small-sized working substance surface or grinds the pipe arrangement linking department and grade.Also be widely used as in recent years to grind and cut or dig the driving arrangement of cutting medical lapping machines such as tooth.The relevant patent and the protection period of model utility also expire, and to those skilled in the art, above-mentioned technology has been known, and has been disclosed use.

A kind of reversed gas motor with the piston that is rotated by pressurized air is disclosed among the clear 46-19845.This gas motor comprises: a cylindric stator 1 is disposed in the housing 2; One rotor 4 is disposed in the stator 1 rotationally; Four wheel blades 5 that embed peripheral groove; One vertical deep hole 18 is formed at the center of rotor 4, and its branch is open-ended in the groove bottom; Two vertical deep holes 15,21 are formed at the wall of stator 1.

Pressurized air comes rotary rotor 4 through the gap part that via hole 15 infeeds stator 1, infeeds groove through via hole 18 simultaneously and floats wheel blade.When rotor 4 rotated, pressurized air was discharged from through via hole 21.

Yet the prior art has following shortcoming: be difficult to process vertical

slotted hole

15,18,21 with bore mode; Because path is narrow, pressurized air can't be supplied with swimmingly, discharge, thereby produces noise, and bigger back pressure can hinder the running of rotor 4.

The utility model is intended to overcome the problem that prior art exists, and its purpose is to provide a kind of gas motor, avoids processing slotted hole, and gas is flowed in passage swimmingly, reduces noise, and obtains required rotating speed apace.

Another purpose of the present utility model is to provide a kind of gas motor, can keep invariablenes turning speed.

The utility model another purpose again is to provide a kind of gas motor, can discharge in atmosphere rapidly being used for the air of rotor.

An also purpose of the present utility model is to provide a kind of gas motor, can prevent rotating shaft off-centre.

The purpose of this utility model is achieved in that promptly provides a kind of gas motor, comprising: a cylindrical body, and its rear and front end is opened wide; One running shaft, by the open forward end of described main body portion, and with the instrument scyewed joint; One rotor with the running shaft rotation, is provided with a plurality of elongated slots on the outer circumferential face of this rotor, a plurality of blades insert respectively in a plurality of elongated slots; One cylinder wherein is equipped with in order to taking in described rotor, forms a plurality of spray-holes on it, is forming a plurality of exhaust ports on this cylinder with on the position of a plurality of spray-hole subtends; One bearing supports described running shaft and described rotor; One bearing housing wherein is fixed with and is used for the bearing of supporting rotor, and this bearing housing has the groove that through hole and is linked to this through hole and forms along circumferential surface; One valve pipe, it is connected in described main body portion integratedly, and has been inserted with air supply hose, and this valve pipe is formed with the air feed road that through hole, groove and described cylinder injection hole with described bearing housing are communicated with respectively; And an air demand adjustable clamp, it is with described valve pipe periphery scyewed joint and be formed with the exhaust line that is communicated with the exhaust port of described cylinder, is used for opening and closing the air feed road of aforementioned valve pipe on the one hand; Aforementioned running shaft, rotor, bearing, bearing housing and valve pipe are loaded in the described main body portion.

Advantage of the present utility model is that the volume of exhaust line increases, and has improved noise elimination effect and exhaust effect, and has fully reduced exhaust pressure; Adopt duplex bearing supported running shaft, prevent its off-centre, avoided the high vibration and the high heat that cause by off-centre.In addition,, therefore, need not to process slotted hole, and make the blade emersion, reach the required time of maximum speed thereby shorten the gas motor by the pressurized air of initial inflow because the groove that links to each other with the bearing housing through hole is corresponding bottom with epitrochanterian elongated slot.And during the gas motor operations, blade continues emersion, so can keep revolution certain.

Below, describe preferred embodiment of the present utility model with reference to the accompanying drawings in detail.Wherein,

Fig. 1 is the perspective view of the utility model gas motor;

Fig. 2 is the sectional view of II among Fig. 1-II face;

Fig. 3 is the amplification view of A part among Fig. 2;

Fig. 4 is the amplification view of IV among Fig. 1-IV face;

Fig. 5 is the planimetric map of Fig. 1 gas motor bearing case;

Fig. 6 cuts the perspective view of a part with the display member marriage relation with Fig. 1 gas motor.

Extremely shown in Figure 6 as Fig. 1, make from the pressurized air of air supply hose 34 (being connected to the rearward end of gas motor body a) by spraying in the cylinder 6 of air feed path to being contained in shell 1 in according to gas motor 30 of the present utility model, thus the running shaft 9 and instrument 32 high speed rotating that make rotor 5, link with rotor 5.Simultaneously, will discharge to the outside through the exhaust line 11 of gas motor body a rearward end by the gas in the aforementioned cylinder 6.

Fig. 2 is the sectional view of Fig. 1, demonstrates the state of the instrument of being connected with 32.

Roughly the shell 1 of pencil shape is the metal manufacturing, and its profile is a polygon, releasably with tubular trunk 1a scyewed joint, and is formed with the intermediate portion of being with the concavo-convex knob of taper.There are two bearings that are set up in parallel 15 its inside, along axle center supporting rotor 5 and running shaft 9.

Rotor 5 connects for inserting with running shaft 9, and the supporting axle of rotor 5 rear ends embeds the bearing 15a of bearing housing 14 from the rear, and simultaneously, running shaft 9 embeds the bearing 15a of shell 1 joint part, thereby rotor 5 and running shaft 9 are bearing in coaxial rotation in the shell 1.

Be processed with a plurality of elongated slot 5a on the rotor 5, for example three elongated slot 5a are inserted with a blade 5b respectively in each elongated slot.

To shown in Figure 5, on the circumferential surface of bearing housing 14, be formed with groove 14b as Fig. 3 from through hole 14a; Groove 14b extends to the position partly corresponding bottom with the elongated slot 5a of rotor 5.Groove 14b forms the length of at least 1/3 (120 °) along the circumferential surface of bearing housing 14.

Front end at aforementioned running shaft 9 is provided with chuck, and the instrument of being convenient to load and unload 32 can be installed.

The cylinder 6 that rotor 5 is installed is formed with the spray-hole 7 that is arranged in a row on circumferential surface, and is formed with exhaust port 8 on the position relative with spray-hole 7.Cylinder 26 has a predetermined off-centre with rotor 5, and is installed between bearing housing 14 and the shell trunk la inwall in the mode of Spielpassung.

Spray-hole 7 be shaped as circle, and exhaust port be shaped as rectangular.

The lip portions 3a of valve pipe 3 front ends is threaded with the rearward end inside part of shell trunk la, can push bearing housing 14 forward.This lip portions 3a and shell 1 form one.

Valve pipe 3 is a small diameter tube, is used for the pressurized air in the air supply hose 34 is introduced in the shell 1.Valve pipe 3 inside constitute one and seal the air feed road C1 of intermediate portion by the next door.Valve pipe 3 front end outer installment have lip portions 3a, and are used for connecting the joint 3b of air supply hose 34 in rear end formation one.

The periphery of valve pipe 3 next door parts is arranged with the valve 12a that protects diagram shape, constitutes air demand modulating valve 12 between the stepped part 12b of this 12a of valve portion and inner barrel 2b.

The outer cylinder body that air feed adjustable clamp 2 is separated by inner barrel 2b that is threaded with valve pipe 3 peripheries and the gap that is used as exhaust line 11 constitutes the two layered cylinder structure.

Aforementioned inside and outside

cylindrical shell

2a, 2b connect to one by the pillar part 2c of rearward end; In simplified 2b be connected in the periphery of valve pipe 3 by liner, be connected in the screw section 13 of valve pipe 3 intermediate portions.

Under aforesaid state, the front end of inner barrel 2b inserts in the rearward end of shell trunk 1a, and the front end of outer cylinder body 2a is connected in the rearward end periphery of aforementioned shell trunk la.

Inner barrel 2b be formed with stepped part 12b interior week, this stepped part 12b constitutes air demand modulating valve 12 with the 12a of the valve portion subtend of valve pipe 3.

Therefore, when rotation air feed adjustable clamp 2 made it mobile vertically, the gap of stepped part 12b and the 12a of valve portion changed, thereby regulated the air supply that flows through air demand modulating valve 12 in the vent 18.

Pressurized air is path from the air feed that the joint 3b of valve pipe 3 is conducted to the spray-hole 7 of cylinder 6.Pressurized air passes through vent 18 from the air feed road C1 of valve pipe 3 inside, 18a also walks around air demand modulating valve 12, behind through hole 14a, a vent C2 and groove 14b who is formed in the bearing housing 14, arrive vertical through hole C3 along the peripheral part of cylinder 6, forming this air feed is path.

Pressurized air is that vertical spray-hole 7 is injected in the cylinder behind the path by aforementioned air feed, provides rotating force to rotor 5, and vertical then exhaust port 98 is discharged to the exhaust system path.

The exhaust system path is to be communicated in exhaust line 11 from the vertical through hole C3 that forms along each exhaust port 8 outside through hole D1, D2, the D3 by the lip portions 3a periphery of bearing housing 14 and valve pipe 3 to constitute.

As previously mentioned, air feed is regulated the outside that clip 2 is connected in shell trunk la, can make the internal diameter of outer cylinder body 2a increase the thickness of shell 1 at least.

Therefore, the volume in the exhaust line 11 increases, and exhaust expansion rate wherein uprises, and has improved noise elimination effect and exhaust efficiency thus, thereby can fully reduce the pressure that is produced in the exhaust line 11.

As previously mentioned, be connected in the front end peripheral part of the outer cylinder body 2a of shell trunk 1a rearward end periphery, with the rear end part sealed attachment of the packaging cover 4 that is matched with shell 1 periphery.

Packaging cover 4 is made by the synthetic resin with excellent adiabaticity, itself and shell 1 are divided into 2 half equally, and the difference embedding is due to the periphery of knob 1b and trunk la, make the rear end 4a protuberance of trunk 1a side, and protrude from the periphery of shell 1, and then its rear portion 4a connected airtight front end outer circumferential face in urceolus 2a as described above, prevent the exhaust gas leakage of exhaust line 11 by this.

Though aforementioned tightness of connecting airtight portion do not have airtight like that high, as described above, can improve the exhaust efficiency of exhaust line 11 by liner, fully force down the pressure in the exhaust line 11, can prevent that by this air from spilling and cause noise from the aforementioned portion of connecting airtight.

The aforementioned portion of connecting airtight comes partition exhaust line 11 by the rearward end of the rearward end of shell trunk 1a and exhaust line 11, by this, can prevent from directly to contact with the exhaust of flowing through exhaust line 11 at high speed as prior art, has reduced leakage of air.And this effect multiplies each other with aforementioned increase noise elimination effect is auxilliary mutually, further lowers exhaust sound.

In addition, the shell 1 that is made of metal according to service condition often by overheated or the cooling.But as described above, owing to use synthetic resin to make packaging cover 4 shell 1 that is covered, so can prevent with the gas motor body a outer circumferential face of user's contact by extremely overheated or cool off with excellent adiabaticity.

Have, aforementioned packaging cover 4 has the function of blocking shell 1 transmission rotor 5 resonance sounds again, can lower by this to spill outside rotor noise.

Instrument 32 one sides of because of high speed rotating are being pressed the surface one side of workpiece to grind or cut and are being produced excessive external force, the off-centre of running shaft 9 be can prevent to increase and be used for two bearings 15 of supporting rotating shaft 9, thereby very violent vibration and high heat avoided producing.Therefore, can fundamentally overcome roughly 80～90% the aforementioned disadvantages that causes product maintenance reason.

Because the exhaust port of cylinder 6 is elongated rectangular, so after the pressurized air that flows into from spray-hole makes rotor 5 rotations, can promptly discharge.

Because the groove 14b that links to each other with the through hole 14a of bearing housing 14 is corresponding with the part bottom of the elongated slot 5a of rotor 5, so can make blade 5b emersion by the pressurized air of initial inflow, shortens the time that arrives maximum number of revolutions.And at gas motor 30 duty cycle chien shih blade 5b continuation emersion, so can keep same revolution.

Claims

1. gas motor comprises:

A cylindrical body, its rear and front end is opened wide;

One running shaft, by the open forward end of described main body portion, and with the instrument scyewed joint;

One rotor with the running shaft rotation, is provided with a plurality of elongated slots on the outer circumferential face of this rotor, a plurality of blades insert respectively in a plurality of elongated slots;

One cylinder wherein is equipped with described rotor, forms a plurality of spray-holes on this cylinder, is forming a plurality of exhaust ports on this cylinder with on the position of a plurality of spray-hole subtends;

A plurality of bearings support described running shaft and described rotor;

One bearing housing wherein is fixed with and is used for the bearing of supporting rotor, and this bearing housing has the groove that through hole and is linked to this through hole and forms along circumferential surface;

One valve pipe, it is connected in described main body portion integratedly, and is inserted with air supply hose, and this valve pipe is formed with the air feed road that through hole, groove and described cylinder injection hole with described bearing housing are communicated with respectively; And

One air demand adjustable clamp, it is with described valve pipe periphery scyewed joint and be formed with the exhaust line that is communicated with the exhaust port of described cylinder;

Aforementioned running shaft, rotor, bearing, bearing housing and valve pipe are loaded in the described main body portion.

2. gas motor as claimed in claim 1 is characterized in that, the groove that forms along the circumferential surface of described bearing housing is positioned at the corresponding bottom position of the elongated slot of described rotor.

3. gas motor as claimed in claim 1 is characterized in that, the bearing that is used for supporting described running shaft is two.