JP3004643U - Vane for air motor - Google Patents

Abstract

(57) [Abstract] [Purpose] Eliminates the conventional mechanical cutting work made of Bakelite such as vanes for air motors, and (a) It is low cost including material cost and processing cost as manufacturing cost. It should be (B)
High wear resistance that can withstand long-term rotation.
(C) The use of lubricating oil should be restricted as much as possible to make the compressed air cleaner, and the improvement shall be made mainly on the following three points. [Structure] As the material of the vane, a synthetic resin containing 1% to 5% by weight of molybdenum disulfide (acrylic type, polyamide type, vinyl type, etc.) is applied, and the synthetic resin is melted → mold injection → Cooling take-out → Ready to use, mechanical cutting is eliminated, and high lubricity and wear resistance are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved vane for an air motor.

[0002]

[Prior art]

 Conventionally, an air motor uses a compressed air as a power source, as shown in, for example, Japanese Utility Model Laid-Open No. 3-65801, and allows a flexible response (for example, based on stall torque) to a driven side. Since then, the rotor vanes have been widely used in the industrial world, and have been constructed by machining machined laminated bakelite. This was due to the fact that no other suitable material could be obtained at that time, so the following drawbacks of the Bakelite vane are as follows: (1) Bakelite has a laminated structure, which means that " It often caused "cracking" and "damage", which was a cause of air motor accidents. (2) Bakelite has a relatively large degree of wear against rotation and sliding, is not necessarily suitable for long-term use, and is frequently replaced. (3) Machining was required for machining as a vane, and its manufacturing cost was high. Even though there are many points to be improved, etc., it has been accepted as a necessary evil until today.

[0003]

[Problems to be solved by the device]

 In view of the above-mentioned circumstances, we investigated an improved vane based on the selection and selection of excellent materials to replace the Becklite vanes and the drastic improvement of the molding processing method. It is inexpensive, including material and processing costs. (B) It must have a high degree of wear resistance to withstand long-term rotation and use. (C) The use of lubricating oil should be restricted as much as possible to enable smoother cleaning of compressed air. The following three points have been set as targets for improvement, and after repeated studies and trials, the present invention has been provided.

[0004]

[Means for Solving the Problems]

 The present invention has dealt with by applying the following means in order to solve the above-mentioned problems. That is, as the vane material, synthetic resin such as acrylic, polyamide or vinyl containing 1% to 5% by weight of molybdenum disulfide is applied to obtain high lubricity and excellent wear resistance. In addition to being equipped, the synthetic resin is melted and poured into a predetermined mold to form a vane all at once in order to eliminate manufacturing by mechanical cutting, and it is configured to be usable immediately after being taken out. Is.

[0005]

[Function of the device]

 When molybdenum disulfide contained in the synthetic resin slides and rotates at high speed while constantly contacting the inside of the inner cylinder of the air motor, it exerts its high lubricity without fail, and the lubricating oil mixed with the compressed air Even if the amount is limited as much as possible, it completely fulfills the role as a vane of the air motor. Furthermore, as a synthetic resin containing molybdenum disulfide, synthetic resin melting → mold injection molding → molding The highly accurate vane manufacturing process makes it extremely easy, eliminates the need for troublesome machining, and makes it a vane that can be used immediately. It is an improved vane.

[0006]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front partial cross-sectional view of an air motor-1 equipped with an air motor vane (hereinafter simply referred to as a vane) 10 of the present invention, and FIG. 2 is an arrow AA of FIG. A cross-sectional view and a side view taken along the line BB of FIG. 1 are shown in FIG. 1, and the vane 10 has a vane groove 41 radially formed at a predetermined position of the rotor-4. The compressed air introduced from the air intake hole 5 provided in the outer cylinder 2 of the air motor -1 is slidably fitted in the inner cylinder 3 of the inner cylinder 3 fixedly fitted in the inner cavity of the outer cylinder 2. Rotating the rotor-4 while sliding the vane groove 41 in the inner cavity of the inner cylinder 3 (circular inner cavity eccentric to the inner cavity circle of the outer cylinder 2) by receiving pressure through the passage. , The compressed air is discharged from the exhaust hole 6, and as long as the compressed air is supplied, it continues to operate to rotate the rotor-4. At this time, the vane 10 has the vane groove 41. Along with the rotation of rotor-4 Sliding in the radial and centripetal directions with respect to the center of the rotor-4 while receiving both the centrifugal force of the vane 10 itself and the pressing force of the inner wall of the inner cylinder 3 due to the eccentricity. It is well known that the upper side 11 of the vane 10 is kept in close contact with the inner wall of the inner cylinder 3.

As an example, the vane 10 is a front view thereof in FIG. 4, a side view thereof in FIG. 5, a perspective view in (1) of FIG. 6, and a C-of (1) in FIG. As shown in the cross-sectional detailed view of arrow C, it is composed of an upper side 11, a side 12, a lower side 13, and a side surface 15. The upper side 11 is closely fitted to the inner cavity wall of the inner cylinder 3 and the rotor-4 and the inner cavity. An air chamber is formed between the wall and a side wall 8 which will be described later. At this time, the side surface 15 receives compressed air pressure and converts it into a rotational force of the rotor-4. The side 12 is in close contact with the side wall 8 (the axial wall of the outer cylinder 2 inner cavity of the air motor-1 corresponding to both surfaces in the direction perpendicular to the rotation axis of the rotor-4) to form the air chamber. It helps to control the length of the vane 10, and the main body of the rotor-4 (the part that has a vane groove 41 instead of the shaft part and has a large diameter with respect to the shaft part). Is almost the same as the length of. In the present embodiment, most of the lower side 13 is formed in an arc shape, but it may be a straight shape or a pot bottom shape. If it is an arc shape, it seems that the contact with the bottom of the vane groove 41 is smooth and the vane strength is also good, but there is no particular proof and it belongs to the designer's selection range. Is.

The material of the vane 10 will now be described. The upper side 11 of the vane 10 is, as described above, constantly rotated by the centrifugal force of the vane 10 itself during the rotation of the rotor-4. Since it rotates in sliding contact with the lumen wall and requires high lubricity and wear resistance, some lubricating oil is also mixed in the compressed air itself (oil pipe in the air pipe -Is provided to adjust the amount of oil mixed while adjusting the amount of oil), but as a countermeasure in this respect, the present invention uses a synthetic resin containing 1% to 5% by weight of molybdenum disulfide. However, if molybdenum disulfide is less than 1%, no significant effect can be obtained on the strength (wear resistance) and lubricity of vane 10, and if it exceeds 5%, it becomes expensive. In terms of strength, it becomes unnecessarily high, which is not preferable, and more preferably 2 to 4%. The synthetic resin as the base material may be any of acrylic resin, polyamide resin, vinyl resin, etc. without any problem. However, phenolic resins, melamine resins, and urea resins are thermosetting and not preferable for injection molding.

By using such a synthetic resin containing molybdenum disulfide as a material, the molding as the vane 10 is extremely easy. That is, if the synthetic resin is melted and poured into a predetermined mold to be molded, it is appropriately cooled and then taken out, and the casting burr is left after the casting burr as shown in (2) of FIG. It is completely smooth, requiring no further maintenance, and can be used immediately without its removal.

Here, the characteristics of the vane 10 of the present invention are clarified by showing the practical test results of the vane 10 according to the embodiment and the vane for machine cutting and machining by Becklite based on the conventional example. To (Item) (Example) (Conventional example) Test (1) * Ratio of lubricating oil mixed in compressed air 1% 1% * Time until vane breakage 2000H 800H * Life due to vane wear 3000H 1200H test ( 2) * Ratio of lubricating oil mixed in compressed air 2% 2% * Operating time until vane breaks 2000H 1500H * Life due to vane wear 3000H 2000H As mentioned above, vane 10 of the present invention has less lubrication It has high lubricity and wear resistance to oil.

[0011]

[Effect of device]

 By carrying out the present invention, it is possible to manufacture a vane very easily by simply preparing a mold without the need for mechanical cutting, and in using it, it has high lubricity and excellent wear resistance. It is economically advantageous as an air motor vane. Furthermore, the amount of lubricating oil mixed in the compressed air can be reduced to about 1/2 of that of the conventional one, and it is preferable as cleaner air in the work environment, economical, and extremely effective in using the air motor. .

[Brief description of drawings]

[Summary] All the drawings show the embodiments of the present invention.

FIG. 1 is a partial front sectional view of an air motor having a vane mounted thereon.

FIG. 2 is a sectional view taken along the line AA of FIG.

3 is a side view of the air motor taken along the line BB of FIG.

FIG. 4 is a front view of a vane.

FIG. 5 is a side view of the vane.

6 (1) is a perspective view of a vane, and FIG. 6 (2) is a detailed cross-sectional view taken along line CC of FIG.

[Explanation of symbols]

1 Air motor 2 Outer cylinder 3 Inner cylinder 4 Rotor 5 Intake hole 6 Exhaust hole 9 Output shaft 10 Vanes 11 Upper side 12 Sides 13 Lower side 15 Sides 19 Inlet section 41 Vane groove.

Claims (1)

[Scope of utility model registration request] 1. A vane of an air motor, which is made of a synthetic resin such as acrylic, polyamide, or vinyl containing 1% to 5% by weight of molybdenum disulfide as a material, has high lubricity and excellent lubricity. In addition to providing abrasion resistance, the synthetic resin was melted and poured into a predetermined mold to form a vane all at once in order to eliminate production by mechanical cutting, and it was configured to be usable immediately after taking out. A vane for an air motor, which is characterized by that.