CN101363326A - Improved motor for pneumatic tools - Google Patents
Improved motor for pneumatic tools Download PDFInfo
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- CN101363326A CN101363326A CNA2008101615991A CN200810161599A CN101363326A CN 101363326 A CN101363326 A CN 101363326A CN A2008101615991 A CNA2008101615991 A CN A2008101615991A CN 200810161599 A CN200810161599 A CN 200810161599A CN 101363326 A CN101363326 A CN 101363326A
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Abstract
The present invention discloses an improved pneumatic tool motor device which comprises a cylinder and a rotor. A cylinder inner cavity of an eccentric circular hole is equipped with the rotor. The rotor is divided into six slots along the radial direction. Every slot is equipped with a vane. A cylinder cover is provided with a bearing supporting the rotor to rotate. The bottom of the vane is provided with two columnar lug bosses at the end face near the slot bottom. The bottom surface of the rotor is provided with two small blind holes. One end of a spring is plugged in the small blind hole, and the other end hitches the small lug bosses. Two arc air current guide slots are symmetrically arranged at the inner wall at the lower end of the cylinder inner cavity and are respectively communicated with air holes at the corresponding side. Obturating rings are arranged at the position of neck journals at two ends of the rotor for improving the leak tightness. The improved motor device can ensure that high pressure air entering the cylinder is all used for pushing the rotor to rotate; the air enters through the lateral wall, so the gas flowing resistance is reduced, and the power of the motor device is improved greatly.
Description
Technical field
The present invention relates to air tool motor apparatus, especially relate to a kind of improved motor for pneumatic tools.
Background technique
Motor for pneumatic tools is the device that the air pressure of high-pressure air can be transformed into mechanical energy, it is air tool driver part, normally the vane rotor that is promoted in the cylinder by high-pressure air is realized rotation motion, be widely used in wind pull, divide drape over one's shoulders, in the pneumatic tools such as windmill and air drill.
In the present motor for pneumatic tools, high-pressure air need be shunted after entering cylinder, part air pressure can be used to release blade, makes blade withstand cylinder inner wall and cylinder is divided into several and holds the gas area, and part air pressure can form pressure difference and drive rotor in above-mentioned appearance gas area.As in patent CN03247050.9, CN99236661.5, all adopting this structure to make blade withstand cylinder inner wall.Can not be converted into required mechanical energy owing to be used to release the air pressure of blade, make air pressure can have loss.This outer air shunting must be offered groove on the cylinder cap of front and back, increased cylinder cap processed complex degree.
High-pressure air generally inserts from pneumatic tool lower handle position, enters cylinder inner cavity in back cylinder cover place turnover 90 degree backs from the cylinder end along gas circuit, as patent CN03800037.7, CN200610005848.9.This structure makes air passageways too tortuous, is unfavorable for gas flow, has reduced power.Patent CN01812892.0 provides a kind of directly pneumatic motor of air passageways that has relatively, and this cylinder bottom has an air inlet and input air channel connection so that pass motor, provides one in fact along diametric air stream.But sidewall enter cylinder high-pressure air some still need to be diverted to the cylinder two ends by the gas circuit in the cylinder wall, and the groove on the cylinder cap of front and back blows out blade and withstands cylinder inner wall from the rotor fluting, this makes the cylinder inner wall gas circuit become complicated tortuous again, and the cylinder difficulty of processing increases.Single in addition inlet hole is unfavorable for that in cylinder middle part air inlet blade is evenly stressed, influences its output power.
On the sealing of cylinder, mainly be between cylinder two ends and front and back cylinder cap, to install wear-resistant gasket additional to realize at present.Between front end housing and cylinder, reach the wear-resistant gasket that is equiped with steel between back cylinder cover and the cylinder respectively as patent CN200510078182.5, reduce wearing and tearing, prevent gas leakage with this.But the position of in fact the easiest generation gas leakage is between the center hole of rotor center axle and cylinder cap.Because the friction of axle and cylinder cap center hole when rotating in order to reduce rotor, will inevitably reserve certain clearance therebetween, but the existence in gap makes the part high-pressure air in the cylinder easily run off from the gap, make the air pressure reduction and influence output power, and the high pressure air that runs off fails to be convened for lack of a quorum and destroys lubricant film in the bearing, makes pivot friction increasing, the lost of life.These defectives have influenced the performance and the power of pneumatic motor significantly.
Summary of the invention
The purpose of this invention is to provide a kind of improved motor for pneumatic tools, effective rate of utilization, minimizing air passageways tortuosity, raising cylinder inner cavity sealing by improving pressurized air air pressure energy are effectively improved the output power of pneumatic motor.
The technical solution used in the present invention is:
Comprise the cylinder and the rotor that have two main exhaust holes, be in the cylinder inner cavity of eccentric circular hole rotor is housed, the rotor radial five equilibrium has six grooves, and blade all is housed in each groove, the cylinder two ends are by front end housing and back cylinder cover sealing, and cylinder cap is provided with the rotation of bearings rotor; Each blade bottom is provided with cylindrical two small boss on the end face near the fluting bottom, the rotor bottom surface is provided with two small blind holes, spring one end inserts in the small blind hole, and the other end entangles small boss, and symmetry has two pores on the lower end side of cylinder main exhaust hole.
Be arranged with two arc air-flow guide slots on the inwall of described cylinder inner cavity lower end, be communicated with the pore of respective side respectively, described arc air-flow guide slot one end and axis of symmetry angle are 20～30 degree, and its span is 80～90 degree.
Seal ring has been set up at the axle journal position of described two ends of rotor, during the cylinder cap seal ring is slotted before and after being embedded in.
The present invention compares the beneficial effect that has with background technique:
(1) utilize elastic potential energy to release blade from the rotor fluting, make the high-pressure air that enters cylinder need not to shunt again, promote in the vane rotor rotation but all act on, air pressure can utilization ratio be improved.The groove on the cylinder cap of existing front and back has also been saved in this improvement in addition.
(2) inlet hole is opened on the cylinder sidewall and cooperation arc air-flow guide slot, high-pressure air is directly impacted on blade, reduced the tortuosity of gas channels greatly, be convenient to gas flow and reduced resistance, improve power.
(3) at the axle journal position of two ends of rotor, because the existence of seal ring has significantly reduced high-pressure air and run off, guaranteed air pressure inside from preset clearance, and the destruction of protecting the lubricant film in the bearing to avoid leaking high pressure draught.
In a word, in conjunction with the advantage of this three aspect, the output power of improving the back motor apparatus will be greatly enhanced.
Description of drawings
Fig. 1 is a cylinder schematic representation of the present invention.
Fig. 2 is the plan view of erection drawing of the present invention.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the B-B sectional view of Fig. 3.
Fig. 5 is the C-C sectional view of Fig. 3.
Among the figure: 1, cylinder, 2, rotor, 3, blade, 4, spring, 5, locating stud, 6, front end housing, 7, back cylinder cover, 8, bearing, 9, seal ring, 10,, 11, pore, 12, arc air-flow guide slot, 13, the main exhaust hole, 14, cylinder inner cavity, 15, pore, 16, positioning hole, 21, small blind hole, 31, small boss, 61, positioning hole, 71, positioning hole.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
With reference to Fig. 1～shown in Figure 5, the present invention includes the cylinder 1 and the rotor 2 that have two main exhaust holes 13, be in the cylinder inner cavity 14 of eccentric circular hole rotor 2 is housed, rotor 2 radially five equilibrium has six grooves, blade 3 all is housed in each groove, the cylinder two ends are by front end housing 6 and back cylinder cover 7 sealings, and cylinder cap is provided with 2 rotations of bearing 8 support rotor.Each blade 3 bottom is provided with cylindrical two small boss 31 on the end face near the fluting bottom, the rotor bottom surface is provided with two small blind holes 21, spring 4 one ends insert in the small blind hole 21, the other end entangles small boss 31, symmetry has two pores 11,15 as inlet hole or secondary exhaust port on the lower end side of cylinder main exhaust hole, and the selection of inlet hole or secondary exhaust port is determined by sense of rotation.Locating stud 5 passes the positioning hole 61 of front end housing 6, the positioning hole 16 of cylinder 1 and positioning hole 71 location of back cylinder cover 7.
Be arranged with two arc air-flow guide slots 12 on the described cylinder inner cavity 14 lower end inwalls, be communicated with the pore 11,15 of respective side respectively, described arc air-flow guide slot 12 1 ends and axis of symmetry angle are 20～30 degree, and its span is 80～90 degree.
When rotor 2 was static, the blade 3 in the rotor fluting extended radially fluting and withstands the inwall of cylinder 1 under the resilient force of spring 4, cylinder inner cavity 14 is divided into several holds the gas area.According to sense of rotation, high-pressure air enters cylinder from two inlet holes 11 (or 15) of the corresponding side of cylinder, and this moment, two pores 15 (or 11) of opposite side served as secondary exhaust port.When requiring the rotor sense of rotation to change, original inlet hole and secondary exhaust are respectively from working as secondary exhaust port and inlet hole.High-pressure air at first is diffused into several along inwall arc air-flow guide slot 12 by inlet hole 11 (or 15) to be held in the gas area, because cylinder inner cavity 14 is an eccentric opening, rotor axis overlaps with cylinder cylindrical axis again, therefore each blade extrusion of holding the both sides, gas area is not wait in the chamber, the atmospheric pressure that blade 3 is subjected to also is not wait, and begins high speed rotating at the action of pressure lower rotor part.Affact in the process that promotes rotor 2 rotations on the blade 3 up to air-flow in air inlet, air-flow does not need through bigger turnover, does not need to shunt yet, and air pressure can be fully utilized.During rotor 2 rotations, blade 3 is under the effect of elastic force, rotary centrifugal force and cylinder inner wall pressure, and the overhang of adjusting vane guarantees that blade and cylinder inner wall hold out against automatically.Most of gas is discharged from main exhaust hole, middle part 13 during rotation, and remaining gas is discharged from the secondary exhaust port 15 of opposite side (or 11).Axle journal position at rotor 2 two ends because the existence of seal ring 9 has significantly reduced high-pressure air and run off from preset clearance, has guaranteed air pressure inside, and has protected the lubricant film in the bearing 8.
Claims (3)
1. improved motor for pneumatic tools, comprise the cylinder (1) and the rotor (2) that have two main exhaust holes (13), be in the cylinder inner cavity (14) of eccentric circular hole rotor (2) is housed, rotor (2) radially five equilibrium has six grooves, blade (3) all is housed in each groove, the cylinder two ends are by front end housing (6) and back cylinder cover (7) sealing, and cylinder cap is provided with bearing (8) support rotor (2) rotation; It is characterized in that: each blade (3) bottom is provided with cylindrical two small boss (31) on the end face near the fluting bottom, the rotor bottom surface is provided with two small blind holes (21), spring (4) one ends insert in the small blind hole (21), the other end entangles small boss (31), and symmetry has two pores (11,15) on the lower end side of cylinder main exhaust hole.
2. a kind of improved motor for pneumatic tools according to claim 1, it is characterized in that: be arranged with two arc air-flow guide slots (12) on the inwall of described cylinder inner cavity (14) lower end, be communicated with the pore (11,15) of respective side respectively, described arc air-flow guide slot (12) one ends and axis of symmetry angle are 20～30 degree, and its span is 80～90 degree.
3. a kind of improved motor for pneumatic tools according to claim 1 is characterized in that: seal ring (9) has been set up at the axle journal position at described rotor (2) two ends, during cylinder cap (6,7) seal ring is slotted before and after being embedded in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101615991A CN101363326A (en) | 2008-09-23 | 2008-09-23 | Improved motor for pneumatic tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101615991A CN101363326A (en) | 2008-09-23 | 2008-09-23 | Improved motor for pneumatic tools |
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| Publication Number | Publication Date |
|---|---|
| CN101363326A true CN101363326A (en) | 2009-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101615991A Pending CN101363326A (en) | 2008-09-23 | 2008-09-23 | Improved motor for pneumatic tools |
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| CN (1) | CN101363326A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182623A (en) * | 2010-10-17 | 2011-09-14 | 龙全洪 | Fluid power machine |
| CN102996404A (en) * | 2012-12-28 | 2013-03-27 | 深圳市力科气动科技有限公司 | Gas compressor |
| GB2518276A (en) * | 2013-07-10 | 2015-03-18 | Spx Corp | High torque rotary motor |
| CN104863641A (en) * | 2014-04-02 | 2015-08-26 | 摩尔动力(北京)技术股份有限公司 | Surface-contact boundary-variable fluid mechanism |
| CN105275498A (en) * | 2014-06-16 | 2016-01-27 | 蓝星(北京)化工机械有限公司 | Coaxial vane type pneumatic motor |
| CN113833529A (en) * | 2020-06-24 | 2021-12-24 | 施耐宝公司 | Flow diverter for a flow path of a pneumatic tool |
-
2008
- 2008-09-23 CN CNA2008101615991A patent/CN101363326A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182623A (en) * | 2010-10-17 | 2011-09-14 | 龙全洪 | Fluid power machine |
| CN102996404A (en) * | 2012-12-28 | 2013-03-27 | 深圳市力科气动科技有限公司 | Gas compressor |
| GB2518276A (en) * | 2013-07-10 | 2015-03-18 | Spx Corp | High torque rotary motor |
| CN104863641A (en) * | 2014-04-02 | 2015-08-26 | 摩尔动力(北京)技术股份有限公司 | Surface-contact boundary-variable fluid mechanism |
| CN105275498A (en) * | 2014-06-16 | 2016-01-27 | 蓝星(北京)化工机械有限公司 | Coaxial vane type pneumatic motor |
| CN105275498B (en) * | 2014-06-16 | 2017-01-11 | 蓝星(北京)化工机械有限公司 | Coaxial vane type pneumatic motor |
| CN113833529A (en) * | 2020-06-24 | 2021-12-24 | 施耐宝公司 | Flow diverter for a flow path of a pneumatic tool |
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Open date: 20090211 |