CN107091118B - Pneumatic motor for pneumatic tool - Google Patents
Pneumatic motor for pneumatic tool Download PDFInfo
- Publication number
- CN107091118B CN107091118B CN201610089332.0A CN201610089332A CN107091118B CN 107091118 B CN107091118 B CN 107091118B CN 201610089332 A CN201610089332 A CN 201610089332A CN 107091118 B CN107091118 B CN 107091118B
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- Prior art keywords
- vane
- straight section
- pneumatic
- blade
- grooves
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
- F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F01C1/3441—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
- F01C1/3442—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/08—Rotary pistons
- F01C21/0809—Construction of vanes or vane holders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Hydraulic Motors (AREA)
Abstract
The invention relates to a pneumatic motor of a pneumatic tool, which comprises a cylinder, a rotating shaft and a plurality of blades, wherein the rotating shaft is radially and concavely provided with a plurality of blade grooves, each blade is movably accommodated in the blade groove, the side edge of at least half of the blades extending into the blade grooves is provided with a straight section, the middle part of the straight section is convexly provided with a square protruding piece, the shape of at least half of the blade grooves is corresponding to the shape of the blades with the straight sections, the bottom edges of the blade grooves also form a straight section corresponding to the straight section of the blades, and the middle part of the straight section of each blade groove is concavely provided with a square concave part capable of relatively accommodating the protruding piece of the blade, thereby forming the pneumatic motor of the pneumatic tool, which can increase the number of air chambers, reduce the air consumption and improve the running efficiency.
Description
Technical Field
The present invention relates to a pneumatic tool, and more particularly, to a pneumatic motor for a pneumatic tool.
Background
Referring to fig. 9 to 11, the conventional pneumatic tool mainly includes a cylinder 50, a rotating shaft 60 and a plurality of blades 70, the cylinder 50 includes an air inlet 51 and an air outlet 52, the air inlet 51 is connected to a high pressure gas source, the rotating shaft 60 is rotatably accommodated in the cylinder 50, the rotating shaft 60 is eccentrically disposed with respect to the cylinder 50, a plurality of blade grooves 62 are radially recessed on the periphery of the rotating shaft 60, the blades 70 are movably accommodated in the blade grooves 62, and when the pneumatic gas is introduced into the cylinder 50 from the air inlet 51 of the cylinder, the high pressure gas drives the rotating shaft 60 to rotate by pushing the blades 70, thereby outputting power.
However, since the side edge 72 of the vane 70 is curved, the bottom 622 of each vane slot 62 of the shaft 60 is also curved, and the thickness of the shaft 60 near the axial center is reduced due to the vane slots 62, and the shaft 60 near the axial center is subjected to a large load force during the movement of the pneumatic motor, so that the structural strength of the shaft 60 is weakened due to the reduced thickness of the shaft 60 near the axial center, and the shaft 60 is easily damaged, and the service life of the pneumatic motor is reduced, therefore, most of the conventional pneumatic motors are provided with only six vanes 70, and the interior of the cylinder 50 is divided into six air chambers to provide sufficient torque to drive the shaft 60 and the tool to move, and maintain the structural strength of the shaft 60, but as a result, each air chamber in the cylinder 50 has a large volume, and therefore, a large amount of high-pressure air is required to be input to each air chamber to drive the vane 60, the use of high pressure gas is somewhat wasteful and the torque provided by it is limited.
Further, if the number of the air chambers is increased by increasing the number of the blades 70 and the volume of each air chamber is reduced to reduce the air consumption of the high pressure gas and increase the torque force output by the air motor, the increase of the number of the blades 70 further reduces the thickness of the rotating shaft 60 near the axial center, so that the structural strength of the rotating shaft 60 is further weakened, the rotating shaft cannot bear a high load, and the rotating shaft is easily damaged, and the service life of the whole air motor is shortened.
Disclosure of Invention
Therefore, the inventor of the present invention has made extensive experiments and studies to solve the problems of the prior art.
The present invention is directed to a pneumatic motor of a pneumatic tool, which can effectively increase the number of air chambers to reduce the air consumption of high pressure air, thereby increasing the torque provided by the pneumatic motor and maintaining the structural strength of the rotating shaft, thereby achieving the purpose of increasing the overall operating efficiency of the pneumatic motor.
To achieve the above object, the present invention provides a pneumatic motor for a pneumatic tool, comprising:
the air cylinder is provided with an air inlet and an air outlet;
the rotating shaft can be rotatably arranged in the cylinder, and a plurality of blade grooves are radially and concavely arranged on the rotating shaft;
a plurality of blades, each of which is movably accommodated in the blade groove, one side edge of each blade is placed in the corresponding blade groove, and the other side edge is exposed out of the blade groove, wherein:
the side edge of at least half of the vanes extending into the vane grooves is provided with a straight section, the middle part of the straight section is convexly provided with a square lug, the shape of at least half of the vane grooves corresponds to the shape of the vanes with the straight section, the bottom edges of the vane grooves also form a straight section corresponding to the straight section of the vanes, and the middle part of each straight section of the vane grooves is concavely provided with a square concave part capable of relatively accommodating the lug on the vane.
Preferably, the rotating shaft is provided with more than six blades.
Preferably, twelve blades are arranged on the rotating shaft.
Preferably, the length of the tab of each blade with straight sections is less than one third of the total length of the blade.
Preferably, the number of the blade grooves with the straight sections is half of the number of all the blade grooves.
Preferably, the blade groove with the straight section and the blade groove without the straight section are arranged at intervals.
Preferably, the bottom surface of the blade groove without the straight section is concave with an arc curved surface, and the side edge of the blade without the straight section, which extends into the blade groove without the straight section, is curved.
Preferably, the rotating shaft is eccentrically arranged relative to the cylinder.
Through the technical means, the invention can improve the integral structural strength of the rotating shaft by utilizing the straight sections formed by the blades and the blade grooves, so that the number of the blades and the blade grooves can be properly increased, the number of air chambers in the air cylinder can be increased, the air consumption can be reduced, and the operation efficiency and the output torque of the pneumatic motor can be improved.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein the content of the first and second substances,
fig. 1 is a perspective view of the present invention.
Fig. 2 is an exploded perspective view of the first embodiment of the present invention.
Fig. 3 is an end sectional view of the first embodiment of the present invention.
Fig. 4 is an end sectional view of a second embodiment of the present invention.
FIG. 5 is a side sectional view of a rotating shaft according to a second embodiment of the present invention.
FIG. 6 is an end sectional view of a second embodiment of the shaft of the present invention taken along section line A-A in FIG. 5.
FIG. 7 is an end sectional view of a second embodiment of a shaft of the present invention taken along section line B-B of FIG. 5.
Fig. 8 is a side sectional view of a rotary shaft according to a third embodiment of the present invention.
Fig. 9 is an exploded perspective view of a conventional pneumatic motor.
Fig. 10 is a side sectional view of a conventional air motor rotary shaft.
Fig. 11 is an end sectional view of a conventional pneumatic motor.
The reference numbers illustrate:
10 cylinder 11 air inlet
12 air outlet 20 rotating shaft
22. 22A vane slot 222 straight section
224 recess 30 blade
32 straight section 34 tab
50 cylinder 51 air inlet
52 air outlet 60 rotating shaft
62 vane slot 622 bottom
70 vane 72 side edge
Detailed Description
The present invention relates to a pneumatic motor of a pneumatic tool, please refer to fig. 1, fig. 2 and fig. 3, as can be seen from the figures, the pneumatic motor of the present invention mainly comprises a cylinder 10, a rotating shaft 20 and a plurality of blades 30, the cylinder 10 is provided with an air inlet 11 and an air outlet 12, the rotating shaft 20 is rotatably disposed in the cylinder 10 and can be eccentrically or coaxially disposed with respect to the cylinder 10, the rotating shaft 20 is radially recessed with a plurality of blade slots 22, each blade 30 is movably received in the blade slot 22, one side edge of each blade 30 is disposed in the corresponding blade slot 22, the other side edge is exposed out of the blade slot 22, the side edge of each blade 30 extending into the blade slot 22 has a straight section 32, and a square protruding piece 34 is protruded in the middle of the straight section 32, and the length of each protruding piece 34 is less than one third of the total length of the blade 30, in addition, each blade groove 22 is formed with a straight section 222 corresponding to the straight section 32 of the blade 30 at the bottom edge of the blade groove 22 corresponding to the shape of the blade 30, and a square concave part 224 capable of relatively accommodating the convex piece 34 on the blade 30 is concavely arranged in the middle of the straight section 222 of each blade groove 22.
Therefore, referring to fig. 5 to 7, since each blade groove 22 of the rotating shaft 20 has a straight flat section 222, it is able to maintain a relative thickness of the rotating shaft 20 near the axis, even though the thickness of the rotating shaft 20 is slightly thinner than the thickness of the concave section 224 of the blade groove 22, but the thickness of the rotating shaft 20 is still enough at both sides of the concave section 224 of the flat section 222, so the rotating shaft 20 can maintain a good structural strength, and therefore, the number of the blade grooves 22 and the blades 30 can be properly increased, according to the practical experiment result of the present invention, the rotating shaft 20 of the pneumatic motor of the present invention can be provided with more than six blades, preferably, 10 or 12 blades, and as shown in fig. 4, the rotating shaft 20 can still maintain a good structural strength.
Therefore, the pneumatic motor of the present invention can increase the number of air chambers in the cylinder 10, relatively reduce the high pressure air required by each air chamber, and reduce the amount of air discharged from the air outlet each time, so as to reduce the air consumption during the operation of the pneumatic motor, and enable the high pressure air to sufficiently push the vane 30 to drive the rotating shaft 20 to rotate, so as to further enhance the torque force output by the pneumatic motor, thereby enhancing the overall operation efficiency of the pneumatic motor.
Referring to fig. 8, it can be seen that the bottom surface of the vane slot 22 of this embodiment may have a straight section 222, while the bottom surface of the vane slot 22A of other portion may be curved and concave, and the side edge of the vane without the straight section extending into the vane slot 22A without the straight section is curved, so that each vane slot 22 and vane slot 22A may respectively match the vane 30 with the straight section 32 or the vane with the side edge forming a curved shape to meet different requirements, and in addition, the number of the vane slots 22 with the straight section 222 is half of the number of all the vane slots 22 and vane slots 22A, and the vane slots 22 with the straight section 222 and the vane slots 22A without the straight section are arranged at intervals.
From the foregoing, it will be observed that numerous modifications and variations can be effectuated without departing from the true spirit and scope of the novel concepts of the present invention, and that the specific embodiments of the present invention disclosed are not to be interpreted as limiting the scope of the present invention, including all modifications that fall within the scope of the appended claims.
Claims (9)
1. A pneumatic motor for a pneumatic tool, comprising:
the air cylinder is provided with an air inlet and an air outlet;
the rotating shaft is rotatably arranged in the cylinder, a plurality of blade grooves are radially and concavely arranged on the rotating shaft, and the rotating shaft is eccentrically arranged relative to the cylinder;
a plurality of vanes, each vane can be movably accommodated in the vane slot, one side edge of each vane is arranged in the corresponding vane slot, the other side edge is exposed out of the vane slot, after the high-pressure gas is led into the cylinder from the gas inlet, the high-pressure gas drives the rotating shaft to rotate by pushing the vane, and the device is characterized in that:
the side edge of at least half of the vanes extending into the vane grooves is provided with a straight section, the middle part of the straight section is convexly provided with a square lug, the shape of at least half of the vane grooves corresponds to the shape of the vanes with the straight section, the bottom edges of the vane grooves also form a straight section corresponding to the straight section of the vanes, and the middle part of each straight section of the vane grooves is concavely provided with a square concave part capable of relatively accommodating the lug on the vane.
2. The pneumatic motor for a pneumatic tool as set forth in claim 1, wherein six or more blades are provided on the rotary shaft.
3. The pneumatic tool air motor of claim 2, wherein twelve blades are provided on the shaft.
4. The pneumatic motor for pneumatic tools as claimed in any one of claims 1 to 3, wherein the length of the lug of each blade having a straight section is less than one third of the total length of the blade.
5. The pneumatic motor for a pneumatic tool as set forth in claim 4, wherein the number of the vane grooves having the straight section is half of the number of all the vane grooves.
6. The pneumatic motor for a pneumatic tool as set forth in claim 5, wherein the vane grooves having the straight sections are spaced apart from the vane grooves having no straight sections.
7. The pneumatic motor for a pneumatic tool as set forth in claim 6, wherein the bottom surface of the vane groove having no straight section is concavely curved, and the side edge of the vane having no straight section extending into the vane groove having no straight section is curved.
8. The pneumatic motor for a pneumatic tool as set forth in claim 5, wherein the bottom surface of the vane groove having no straight section is concavely curved, and the side edge of the vane having no straight section extending into the vane groove having no straight section is curved.
9. The air motor for air tool according to any of claims 1 to 3, wherein the bottom surface of the vane groove having no straight section is concave in an arc-shaped curved surface, and the side edge of the vane having no straight section extending into the vane groove having no straight section is curved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610089332.0A CN107091118B (en) | 2016-02-17 | 2016-02-17 | Pneumatic motor for pneumatic tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610089332.0A CN107091118B (en) | 2016-02-17 | 2016-02-17 | Pneumatic motor for pneumatic tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107091118A CN107091118A (en) | 2017-08-25 |
| CN107091118B true CN107091118B (en) | 2020-08-04 |
Family
ID=59648664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610089332.0A Active CN107091118B (en) | 2016-02-17 | 2016-02-17 | Pneumatic motor for pneumatic tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107091118B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543257Y2 (en) * | 1972-07-28 | 1979-02-14 | ||
| CN1056149A (en) * | 1990-04-21 | 1991-11-13 | 陈志远 | A kind of new architecture of power machine with rolling rotor |
| US5470215A (en) * | 1994-08-26 | 1995-11-28 | Rineer Hydraulics, Inc. | Wear resistant vane-type fluid power converter |
| CN101182844A (en) * | 2007-12-12 | 2008-05-21 | 李东林 | Sliding blade and air cylinder together circle center type rotary compressor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS502781B1 (en) * | 1970-08-15 | 1975-01-29 | ||
| CN2421439Y (en) * | 2000-04-03 | 2001-02-28 | 尹钢 | High-rotary motor |
| DE102004010432B3 (en) * | 2004-03-01 | 2005-10-06 | Zf Friedrichshafen Ag | Sealing device for a radial swing motor |
| WO2013120030A1 (en) * | 2012-02-08 | 2013-08-15 | Shining Golden Yida Welding & Cutting Machinery Manufacture Ltd. | Rotary vane air motor with improved vanes and other improvements |
-
2016
- 2016-02-17 CN CN201610089332.0A patent/CN107091118B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543257Y2 (en) * | 1972-07-28 | 1979-02-14 | ||
| CN1056149A (en) * | 1990-04-21 | 1991-11-13 | 陈志远 | A kind of new architecture of power machine with rolling rotor |
| US5470215A (en) * | 1994-08-26 | 1995-11-28 | Rineer Hydraulics, Inc. | Wear resistant vane-type fluid power converter |
| CN101182844A (en) * | 2007-12-12 | 2008-05-21 | 李东林 | Sliding blade and air cylinder together circle center type rotary compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107091118A (en) | 2017-08-25 |
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