TW201226706A - Rotary air motor housing assembly - Google Patents

Abstract

A rotary vane air motor housing assembly comprises a U-shaped stator housing and an end cap. The U-shaped stator housing extends from a first axial end to a second axial end. The U-shaped stator housing comprises an annular portion and an end wall portion. The annular portion comprises a cylindrical outer surface having a first center axis, and a cylindrical inner surface having a second center axis offset from the first center axis. The cylindrical inner surface defines a rotor pocket for receiving a rotor vane assembly. The end wall portion integrally joins the cylindrical outer surface to the cylindrical inner surface at the first axial end to close off a first end of the rotor pocket. The end cap is mechanically fastened to the second axial end of the U-shaped stator housing to close off a second end of the rotor pocket.

Description

201226706 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention is generally directed to a rotary vane air motor, and more particularly to a stator housing for housing a rotor vane assembly.先前5 [Prior Art] A ready-made rotary vane air motor is used to rotate a power tool such as a fiber roving chopper device. These pneumatic motors are designed as universal motors and thus include common features that must be accommodated when the motor is used in a particular application, such as a hand-held power tool. For example, the stator housing of an off-the-shelf air motor is typically constructed of a cylindrical body whose ends are closed by an end plate that is mechanically fastened to the cylindrical body. This air motor is disclosed in U.S. Patent No. 6,881,044 to Thomas, Jr. et al. The end plates must be sealed to the cylindrical body to prevent leakage of pressurized air. In order to do this, the board and body must be carefully machined so that the mating surfaces are flush with each other, which increases manufacturing costs and time. In addition, the end plates typically include U.S. Standard Pipe Thread (NPT) weirs that must be piped to a source of pressurized air and an exhaust muffler. This line requires hoses and fittings' which increase the cost and size of the power tool. Therefore, there is a need for an improved housing assembly for a rotary vane air motor. SUMMARY OF THE INVENTION The present invention is directed to a rotary vane air motor housing assembly that can be used in a hand-help power tool. The housing assembly includes a U-shaped stator housing and an end cap. The U-shaped stator housing extends from a first axial end to a second axial end. The U-shaped stator housing includes an annular portion I60094.doc 201226706 and an end wall portion. The annular portion VIII-a. 4 77 includes a cylindrical outer surface having a first central axis, and - and - a cylindrical inner surface of the second central axis, the second central axis being offset from the first τ axis shift. The inner surface of the cylinder defines a rotor pocket for receiving a rotor. The end wall portion integrally joins the cylindrical outer surface to the inner cylindrical surface at the axial end to close the -J end of the rotor pocket. The end cap is mechanically fastened to the first axial end of the u-shaped stator housing to enclose a second end of the rotor pocket.

[Embodiment] FIG. 1 is an exploded view of a hand-held power tool assembly having a liquid spray (7) and a fiber roving cutter 12 that can be used with the air motor 14 of the present invention. In Fig. 1, the fiber roving cutter 12 is shown slightly enlarged with respect to the liquid blasting 10. The liquid spray 10 includes a two-component internal mixing gun having a handle 16, a valve body 18, a nozzle 2, and a trigger 22, and the fiber roving cutter 12 includes a pneumatic motor 14, a housing 24, and a cover 26. The valve body 18 of the spray valve includes a valve assembly 28, intake ports 30A and 3B, a material inlet 32, a catalyst inlet "and an exhaust port 36. The housing 24 of the fiber roving cutter 12 includes the following: A fiber inlet 38 including an opening 40, a stretching device 42, a hard stop 44, fasteners 46 A and 46B, and a knob 48. The cover 26 includes a dispenser chute 50. In the illustrated embodiment, the spray 10 includes storage a two-component mixing gun of two liquid components, the two liquid components being mixed while being applied to produce a mixture of the cured material into a hardening material. The first component comprises a resin material such as a polyester resin or a vinyl ester, and Feeded into the valve body 18 at the material inlet 32. The second component comprises a material such as mercaptoethyl-peroxide 160094.doc 201226706 (μεκρ) (4) which hardens the resin material and is fed at the catalyst inlet 34 To the valve body 18. The material inlet 32 and the catalyst inlet 34 respectively feed material into a valve that is within the valve body 18 and that is connected to the valve assembly 28. Other inlets are provided to the gun 1 for other fluids such as solvents. Actuator 22 The valve of 28 is simultaneously opened and the pressurized component flows into the nozzle 2. As shown, the spray 10 includes an internal mixer at which the two sets of injuries are external sources (such as, A pressurized fluid reservoir (not shown) is pressurized at inlets 32 and 34 and mixed in tube a prior to entering nozzle 2. Pressurized air may also be supplied to nozzle 20 to shape the mixed flow stream or In other embodiments, the material is pressurized in the valve body 8 (such as by an external pump powered by an air form inlet 3〇Α and 3〇β) (not shown) The mixture is then mixed outside of the grab 10 and atomized by the mixing nozzle. The fiber roving cutter 12 is mounted to the air motor 丨 4 ^ the pressurized air from the air inlet 30 馈送 is fed to the outlet 36 via the valve body 18, The outlet 36 is connected to an inlet port (Fig. 3) on the air motor 14 of the fiber stub 12. A roving or strand of fibrous material such as fiberglass is fed into the cover 26 via an opening 4 in the fiber inlet 38. By the inventor James η· Rohrer and

Jonathan R. McMichael discusses the air motor 14 by the trigger 22 in more detail in PCT Application No. PCT/2010/003029, entitled "CUTTER BLADE HEAD FOR FIBER ROVING CHOPPER", filed November 23, 2010. The actuating action causes the roving to be drawn into the blade head by a stone head and idler mounted on a housing 24 in the cover 26, the contents of which are incorporated by reference. The truncated roving sheet is ejected from the applicator slide 160094.doc 201226706 trough 50 into a mixed stream of resin and catalyst material from nozzle 20 such that the hardened material includes a fiber reinforcement that increases the strength of the finished product. PCT Application No. PCT/201 1/0015 72, entitled "ADJUSTABLE TENSIONING DEVICE FOR FIBER ROVING CHOPPER", filed on September 13, 2011 by the inventors Corey D. Johnson and Jonathan R. McMichael. In detail, the roving cutter 12 can accommodate rovings of different sizes, and the roving can be cut into pieces of different sizes by adjusting the stretching device 42 and the hard stop 44, the contents of which are incorporated by reference. In. The air motor 14 includes, as discussed in more detail in PCT Application No. PCT/2011/001574, filed on Sep. 13, 2011, the entire content of which is hereby incorporated by reference. A rotational speed control and muffler assembly that adjusts the flow of compressed air through the air motor 14 to vary the speed of the rotor blade assembly within the air motor 14, the contents of which are incorporated by reference. The air motor 14 of the present invention includes a two-piece stator housing that houses a rotor blade assembly for driving the motor 14. Although the invention is described herein with reference to fiber roving cutter 12, the air motor 丨 4 and two-piece stator housing of the present invention can be used in other applications. 2 is a perspective view of the air motor 14 of FIG. 1 showing the muffler assembly 54 extending from the rotational speed control housing 56 surrounding the stator housing 58. The rotational speed control housing 56 includes an annular body having a rim 60. The muffler assembly 54 includes a housing 62, a fastener 64 and a keyway 66. The stator housing 58 includes a mounting plate 68, bearing recesses 70, and mounting holes 72. The drive sleeve of the rotor blade assembly I60094.doc 201226706 74A extends from the inside of the stator housing 58 through the front bearing 76. The muffler-fitting housing 62 is secured to the housing % via a plurality of threaded fasteners 64 or any other suitable structure 2 at a location extending through the exhaust slot (Fig. 3) of the housing 56. The air that is distributed to the air motor 14 from the outlet 36 (Fig. 1) is driven by the air motor 14 at the keyway 66 of the muffler assembly. The stator housing 58 includes an annular body that extends into the housing 56. The rotary fast production control housing 56 is rotatably adjustable about the stator housing 58. As discussed with reference to 5, housing 56 and housing 58 are eccentric, i.e., they are concentric. As the housing 56 rotates about the housing 58, the rim 6 turns to the housing = structural support and grips the housing 56. The drive shaft 74A extends through a mounting plate 68 integrally machined from the housing 58 for engagement with the roving cutter η (the correcting body 24 of the figure). Within the housing 58, the shaft 74A is coupled to the rotor blade assembly 2 The rotor blade assembly is supported by a front bearing (%) in the mounting plate (9) and radially inwardly by the rim 60. Rotation Speed (4) The housing 56 adjusts the position of the muffler assembly 54 with respect to the take-up slot (10) of the stator housing pair to control the speed at which the rotor blade assembly rotates within the housing 58. The muffler assembly 54 is configured to attenuate as the vented air expands and is positioned to direct air away from the operator of the severor 12. As shown in Fig. 3, the stator housing 58 of the present invention comprises a two-piece component, and the two-piece portion has a cup-shaped or dome-shaped housing for accommodating the rotor blade assembly and is slid onto the housing to accommodate the rear bearing. Figure 3 is an exploded view of the air motor 14 of Figure 2, showing the front bearing 76' end cap 78 = the piece assembly 80, the bearing cap 82, the locking mechanism, in addition to the rotational speed control. 84 and rear axle. Rotation speed I60094.doc 201226706 The control housing 56 includes a rim 6〇 and an exhaust. The stator housing 58 includes a mounting plate 68, an end cap 78, an annular portion, a lead-out slot 9〇a, and a weir. And the end wall 'knife 91. The rotor blade assembly 80 includes a drive shaft 74A, a stub shaft 74B, a rotor 92, and a vane 94. The muffler assembly 54 includes a housing 62, a fastener 64, a slot 66, and a muffler baffle 96. The locking mechanism 84 includes a seal 97, a stopper 98, a spring 100, and a washer 102.

The muffler housing 62 is coupled to the rotational speed control housing 56 via a threaded fastener M at the exhaust port 88. The baffle 96 is positioned within the housing 62 between the exhaust port 88 and the slot 66. The rotational speed control housing 56 is positioned around the stator housing such that the exhaust port 88 is aligned with the take-out slots 90A and 9B. The front bearing 76 is positioned within the bearing pocket 70 and the rear bearing 86 is positioned within the bearing cap 82. The bearing cap "includes a bearing pocket 1〇1 (Fig. 4) in which the bearing 86 is positioned. In one embodiment of the invention, the bearing 76 is press fit into the pocket 7 and the draw sleeve 86 is press fit into the cover 82. The rotor blade assembly 8 is positioned "inside" of the stator housing such that the rocking shaft 74A is supported in the front bearing 76, the short shaft 74B is in the rear bearing 86, and the rotor 92 is disposed in the annular portion, portion 89. 78 is coupled to the annular portion 89 to hold the rotor blade assembly 80 and the locking mechanism 84 together with the air motor 14. The end cap 78 secures the locking mechanism 84 between the end cap 78 and the bearing cap 82. The washer 102 is positioned against the bearing cap 82, and the stopper 98 includes a flange that abuts an opening in the end cap 78. In the case where the end cap 78 is coupled to the annular portion 89, the spring 1 〇〇 pushes the stopper 98 Away away from the bearing cap 82 and the stub shaft 74B ° the operator pushes the stopper 98 to compress the spring 1 推动 and push the lugs on the stopper 98 into the mating sockets in the stub shaft 74B. By the inventor 160094. Doc 201226706

Corey D. Johnson, Jonathan R. McMichael, and Ronald W. Mangus discuss the operation of the locking mechanism 84 in the application entitled "ROTARY AIR MOTOR LOCKING ASSEMBLY" filed on the same day. Mounting plate 68 permits housing 58 to be coupled to housing 24 of shutoff 12 (FIG. 1). For example, the mounting surface 103 is flat for flush engagement with the housing 24. Compressed air is supplied to the air motor 14 via an inlet port 104 in the end wall 91 of the stator housing 58. The ring seal 106 is sealed between the mounting plate 68 and the housing 24, and the ring seal 97 seals between the stop 98 and the end cap 78. The inlet port 104 extends through the opening in the housing 24 to the interior of the housing 58. The compressed air induces rotation of the rotor 92 by confirming the pressure against the vanes 94. In particular, as is known in the art, the rotor 92 is eccentrically positioned within the housing 58 to create a pressure differential across the vanes 94. The vane 94 slides into and out of the slot 105 in the rotor 92 due to the eccentricity of the rotor 92 within the bore of the annular portion 89 (Figs. 3 and 4). The compressed air exits the stator housing 58 at the take-out slots 90A and 90B. As discussed in more detail in the aforementioned PCT application to Johnson, the rotational speed control housing 56 is rotated on the stator housing 58 to adjust the position of the exhaust port 88 with respect to the take-out slots 90A and 90B to control the rotor blade assembly. 80 speed. From the exhaust port 88, the compressed air travels into the muffler housing 62 and through the baffles 96 and slots 66 to attenuate the sound produced by the expansion of the compressed air. The annular portion 89 extends axially from the end wall portion 91 to form a U-shaped body 107. An annular portion 89 extends between the end wall portion 91 and the end cap 78 to form a rotor pocket for receiving the rotor blade assembly 80. The rotor pockets are closed by an end cap 78 and an end wall portion 91, except for openings that permit access to the locks 160094.doc -12- 201226706 fixed mechanism 84 and drive shaft 74A, respectively. These openings are sealed by the seals 1〇6 on the mounting plate 68 and the seals 97 on the stoppers 98. Stator housing 58 and end cap 78 provide a mating surface for rotor 92 and vane 94 to engage during operation of air motor 14. The annular portion 89 and the end cap 78 are configured to reduce the critical dimension of the air motor that must be manufactured to provide efficient operation of the rotor blade assembly 80 (e.g., to prevent compression of the second gas as a leak). number. For example, the stator casing includes a single mating interface along which the annular portion 89 and the end cap 78 engage. 4 is a side cross-sectional view of the air motor 14 taken at section 4_4 of FIG. 5 to illustrate the rotational speed control housing 56 and the two-piece stator housing 58 surrounding the rotor blade assembly 80.圊5 is an end cross-sectional view of the air motor 14 taken at section 5-5 of FIG. 4 to show the eccentric position of the rotor blade assembly 8〇 within the stator housing 58. 4 and 5 are also discussed. Referring to Figure 4, the rotational speed control housing 56 includes an annular body having an outer surface ι 8 and an inner surface 110 into which the stator housing 58 is inserted.环形 The annular portion 89 of the stator housing 58 has a surface that fits against the inner surface 110

Face 112, and inner surface 114 forming rotor pocket 115, rotor blade assembly 8 is inserted into rotor pocket 115. The inner surface 11 of the housing 56 includes recesses 116A and 116B, and the seals ii8A & 118b are positioned in the recesses 116a & U6B - for sealing against the housing 58. The seals 1A and 8B contain a shackle that permits sliding of the housing 56 against the housing 58 while preventing air from leaking between the two bodies. The speed control housing 56 is securely fitted around the stator housing 58 such that the position of the housing 56 is in the event that no external force is applied during operation of the air motor 14 (such as the force from the operator of the air motor 14) 160094.doc -13- 201226706 will not move freely. The end wall portion 91 includes a disk that engages the inner surface 114 within the pocket H5 and engages the outer outer surface 112 of the pocket 115 to enclose the rotor assembly 8〇 within the pocket 115. Mounting plate 68 includes a linear axial extension of end wall portion 91, but may have other cross-sectional profiles. The shaft hole 120 extends through the end wall portion 91 and the mounting plate 68 along the axis of rotation of the rotor 92. The bearing pocket 7〇 includes a counterbore that surrounds the shaft bore 120 to receive the front bearing 76. The bearing pockets 7〇 extend through the thickness of the mounting plate 68 and into the end wall portion 91. The bearing pocket includes a recess 122 for receiving the seal 106. The end cap 78 includes an end plate 124, an annular flange 126, and a pocket 128. End plate 124 and annular flange 126 enclose rotor assembly 80 within pocket 115 within annular portion 89. In particular, the annular flange 126 engages the annular portion 89 along the threaded engagement 13". In an embodiment of the invention, the annular portion 89 includes a male thread and the flange 126 includes a female thread. The threaded engagement 13 〇 extends across less than the width of the annular flange 126 such that the end plate 124 does not contact the annular portion. The inner diameter surface of the annular flange 126 is thereby in contact with the outer surface 112 of the annular portion 89 along the mating interface. The cap-shaped body 1〇7 is reciprocally coupled to each other along a single mating interface to maximize tolerance (10) erance coffee-calling and money-like minimization. As mentioned previously, the locking mechanism 84 is disposed within the pocket 128 of the end cap 78. The stopper 98 includes a knob 132, a flange 134, and a lug 136. The screw (4) extends through the aperture U7 in the pocket 128 to provide access to the operator of the air motor 14. The flange 134 engages the mating flange 138 of the pocket 128 in the cover 78. The flange 134 includes a passage 160094.doc • 14-201226706 for receiving the beak ring seal 97. The gasket 102 is disposed within the counterbore 140 in the cover 78. The counterbore 140 is in a flush position with the end plate 124 of the cover 78 such that both the washer 1〇2 and the end plate ι24 are flush with the bearing cap 82. Spring ι00 is placed around the lug 136 and within the flange 134 to apply a spring force between the knob 132 and the washer ι2. The flange 134 prevents the stopper 98 from being pushed out of the hole 137. The inner diameter of the washer 140 is larger than the lug 136 but smaller than the diameter of the spring 100. In the state shown in Fig. 4, the lug 136 extends from the knob 132 so as not to contact the stub shaft 74b. in

In the particular embodiment shown, the lug 136 penetrates the collar 140, but does not need to extend so far. The stub shaft 74B includes a socket 142 into which the lug 136 is inserted when the operator pushes the knob 132 against the force of the spring 1 ,, thereby preventing the rotor 92 from rotating. As explained in more detail in the aforementioned application in the same application, the compressed air prevents the operation of the locking mechanism 84 while the air motor 14 is operating. The rotor % of rotor blade assembly 80 including shafts 74A and 74B extends axially from mechanism 84 to the exterior of housing 58. The stub shaft 74B is concentrically disposed within the rear bearing 86 and the bearing cap 82. The drive shaft 74 is disposed in the front bearing sleeve recess 80. Bearings 76 and 86 comprise any of the bearings commonly known in the art, such as ball bearings. Bearing cap 82 is positioned within shoulder 143 of stator housing 58. The rotor 92 contacts the bearing cap 82 and the end wall portion 91 and is configured to be inserted within the pocket 5 to insert the vane 94 into the slot ι 5 (Fig. 5) within the rotor %. Compressed air W is applied to human σ 埠 1 () 4 (Fig. 5) to cause the rotor 92 to rotate within the inner surface 114 by creating a force difference across the blade %. The spring 144 maintains the blade 94 in a wire 5 toward the surface 114 (four). As the rotor π rotates within the housing % I60094.doc 201226706, the blade 94 slides in and out of the slot 1〇5. Referring to Figure 5, the speed control housing 56 includes an annular cylinder having an outer surface 1 〇 8. The inner surface 110 extends into the cylinder to form a bore for receiving the stator housing bore. The center of the inner surface 110 is offset from the center of the outer surface 1 〇 8 such that the surfaces 108 and 110 are eccentric. As discussed with respect to Figure 3, the passage extends through the housings 56 and 58 to connect the interior of the air motor 14 to the muffler assembly 54. The stator housing 58 includes an annular cylinder having an outer surface 112. The inner surface 114 extends into the cylinder to form a bore containing a pocket 115 for receiving the rotor blade assembly 8 turns. The center of the inner surface 114 is offset from the outer surface ,] such that the surfaces 112 and π 4 are eccentric. As is known in the art, this eccentricity is characteristic of a rotary vane air motor. The center of the rotor 92 surrounded by the rotation of the rotor blade assembly 80 is concentric with the outer surface 112 of the housing μ and the inner surface 110 of the housing 56 along the axis of rotation ra. Compressed air enters the housing 58 via the inlet port 104 and pressurizes the area behind the blade 94a. The pressure increase behind the vane 94A causes the vane 94a and the rotor 92 to rotate counterclockwise with reference to FIG. As the blade 94A rotates, the blade extends further away from the slot 1 〇 5A under the force of the spring 144. At the same time, the space between the rotor 92 and the inner surface 114 is increased, thereby reducing the pressure in front of the vanes 94a. The rotor 92 is thus caused to continue to rotate counterclockwise. Once the vane 94A reaches the damper ... into 54, the compressed air escapes the air motor 丨 4 at the keyway 66. The 裒-shaped 裒 106 and the 〇-shaped ring 97 enclose the two air passages between the inlet 埠1〇4 and the lead-out grooves 9〇A and 9〇B. For example, compressed air can be blown through bearings % and 86 or by bearings 76 and 86. The ring 106 and the ring 97 prevent air leakage and improve the efficiency of the air motor 14. 160094.doc 201226706 In the present invention, U-shaped body 107 and end cap 78 form a two-piece housing that forms a rotor pocket 115. Body 107 and end cap 78 are typically fabricated from aluminum and aluminum alloys, but may be made of other materials in other embodiments. In one embodiment, the stator housing 58 includes an anodized hard coat for improved wear resistance. The castellated body 107 and end cap 78 are machined to have a number of critical dimensions to permit the rotor blade assembly 80 to rotate accurately within the pocket 115. The diameter of the inner surface 114 includes a first critical dimension. Offset of inner surface ^4 within outer surface 112

The amount is the first critical dimension. The first critical dimension and the second critical dimension are improved by the torque applied by the compressed air to the rotor blade assembly 8 turns. These critical dimensions are controlled by machining the annular portion 89 and the end wall portion 91 from a single block of material. Thus, the position of the end wall portion 91 with respect to the annular portion 89 and the recess 115 is fixed. The f-thick dimension is the depth of the pocket 115' which is controlled in the present invention by the interaction of the bearing cap 82 and the annular portion 89. The bearing cap is located within the shoulder 143 such that the depth of the shoulder 143 correctly positions the bearing cap 82 with respect to the end wall portion 91. The shoulder (4) is machined into the annular portion (4) and is thereby fixed with respect to the annular trowel 89 and the pocket 115. Therefore, the distance between the shoulder (4) and the end wall portion 91 is fixed, so that the depth of the recess u5 -

All of the features required for the smear of the stator housing 58 to be je je + % + * 〇X , ^ are thus located on a single body. For example, oh, oh. (d) Outside the proper position, the end cap 78 and the annular portion 89 are not critical. Thus, the gusset 124 is spaced from the annular portion 89 such that the end cap 78 is imaginary only at the single-fit interface at the threaded nozzle 130. The set "varies in addition to the machining of the casing (four), in particular the variables of the prior art casing mechanically fastened to the annular body by the two end caps 160094.doc 201226706, so that the critical dimension between the two movable parts is set It is necessary. The engagement of the end cap to the annular body in conventional configurations requires that the two end caps have a flat surface that must mate with the two flat surfaces on the annular body. The configuration of the present invention eliminates flat surfaces against each other To form a stack of pockets 115. Furthermore, the stator housing 58 can be incorporated into a flush mount or face on a hand-held power tool, such as by mating the mounting surface 103 of the mounting plate 68 directly to the housing μ In the installation system, no additional external (four) is required to connect the air motor 14 to the pressurized air source in the hand-held power tool. For example, the air inlet 埠1〇4 of the mounting plate 68 can be directly fitted into the housing 24. The outlet port is, and the muffler assembly 54 is mounted directly to the speed control housing %. Thus, the air motor 14 of the present invention is more compact, lighter in weight, and less expensive. Although reference has been made to the preferred embodiment. The present invention will be understood by those skilled in the art that the present invention can be changed in form and detail without departing from the spirit and scope of the present invention. [Fig. 1] An exploded view of a hand-held power tool comprising a liquid spray gun and a fiber roving cut-off assembly. Figure 2 is a view of the air motor of Figure 1 showing the rotational speed control housing surrounding the two-piece stator housing Figure 3 is an exploded view of the air motor of Figure 2 from the two-piece stator housing removed from the rotating display rotor blade assembly. Figure 4 is the air motor of Figure 2 _ degree control housing and two ι >5 side view of the rotating scorpion shell of the 5th assembly. 160094.doc -18- 201226706 Figure 5 is a view of the air motor taken at section 5-5 of Figure 4 to show the rotor End view of the blade assembly in the eccentric position of the rotor pocket of the stator housing. [Main component symbol description] - 10 liquid spray grab. 12 fiber roving cutter 14 air motor 16 handle 〇 ^ 18 valve body 20 nozzle 22 trigger 24 housing 26 Cover 28 Valve Assembly 30A Inlet/Air Form Inlet Q 308 Inlet/Air Form Inlet 32 Material Inlet 34 Catalyst Inlet • 36 Exhaust Port 38 Fiber Inlet 40 Opening 42 Tensioning Device 44 Hard Stopper 46A Fastener 160094.doc -19- 201226706 46B Fasteners 48 Knobs 50 Stirrer chutes 52 Tubes 54 Silencer assemblies 56 Rotating speed control housing 58 Stator housing 60 Flange 62 Housing / Muffler housing 64 Fasteners / Threaded fasteners 66 Keyway 68 Mounting plate 70 Bearing pocket 72 Mounting hole 74A Drive shaft 74B Short shaft 76 Front bearing 78 End cap 80 Rotor blade assembly 82 Bearing cap 84 Locking mechanism 86 Rear bearing 88 Exhaust 埠 89 Ring portion 160094. Doc -20- 201226706 90A Take-out groove 90B take-out groove 91 end wall portion 92 rotor • 94 blade. 94A blade 96 muffler baffle 97 seal / ring seal Ο η. 98 Stopper 100 Spring 101 Bearing pocket 102 Washer 103 Mounting surface 104 Inlet 进气 / Inlet 珲 105 Slot 10 5 A Slot 106 Ring-shaped ring seal 107 U-shaped body " 108 Outer surface 110 Inner surface 112 Outer surface 114 Inner surface 115 Rotor pocket 116Α Groove 160094.doc -21 - 201226706 116B Groove 118A Seal 118B Seal 120 Shaft hole 122 Groove 124 End plate 126 Annular flange 128 Pocket 130 Threaded feed 132 Knob 134 Convex Edge 136 lug 137 138 mating flange 140 countersunk hole 142 socket 143 shoulder 144 spring RA axis of rotation 160094.doc -22

Claims (1)

201226706 VII. Application for Patent Park: 'It contains: . extends to the beam end to a second 1. A rotating blade air motor housing assembly is a U-shaped stator housing from a first - axial end 'the U shape The stator housing includes an annular portion including: a circular outer surface having a first cylindrical inner surface having a self-twisting axis and a first central axis offset from the first central axis , the inner table of the cylinder ^^^ π 疋 疋 - a rotor pocket for receiving a rotor blade assembly; and an end wall portion integrally joined to the first end of the cylindrical inner surface at the first face, and at the end of the shank The outer surface of the cylinder is closed to the end of the rotor pocket, which is mechanically fastened to the second axial end of the stator housing to close a second end of the rotor pocket. 2. The rotary vane air motor housing assembly of claim 1, wherein the end wall further comprises: a rotor bore for receiving a shaft of the rotor blade assembly. 3. The rotary vane air motor housing assembly of claim 2, wherein the end wall further comprises: a bearing recess disposed on an exterior of one of the end walls to face away from the rotor concave eight' wherein the bearing recess Concentric with the rotor bore. 4. The rotary vane air motor housing assembly of claim 3, wherein the bearing pocket further comprises: a mounting surface that extends perpendicular to the first central axis and the second center 160094.doc 201226706 axis. A mounting hole for joining the ampoule face to a power tool housing; and a passage for receiving a seal that surrounds the bearing pocket. 5. The rotary vane air motor housing assembly of claim 1 wherein the end cap is screwed onto the annular portion. 6) The rotary vane air motor housing assembly of claim 1, wherein the end cap further comprises: an end plate; and a _1 heart flange extending from the end plate to engage with the annular portion. The rotary vane air motor housing assembly of claim 6, wherein the annular rim surrounds the cylindrical outer surface at the second axial end 4 of the cast stator housing. A rotary vane air motor housing assembly of the invention of claim 6 wherein the end plate is spaced from the second axial end of the stator housing. A rotary vane air motor housing assembly according to claim 6 wherein the annular portion of the U-shaped stator housing further comprises: a shoulder. P ' is disposed at the second axial end of the inner surface of the cylinder. The rotary vane air motor housing assembly of claim 9 further comprising: a bearing cap disposed in the shoulder and abutting the end plate to separate the end plate from the annular portion. The rotary vane air motor housing assembly of the present invention, wherein the bearing 160094.doc 201226706 cover comprises: - a bearing recess disposed in an outer rotor pocket of the bearing cap; and a shaft of the read assembly, Turning a rotor hole 'which is used to receive the rotor blade sub-hole is concentric with the bearing pocket. 12. The rotary vane air motor housing assembly of claim 6 comprising: a one-way bore central bore extending through the end plate; an annular recess that surrounds the bore on one of the outer ends of the end cap a flange extending from the end of the annular pocket to the annular pocket 13. The rotary vane air motor housing assembly of claim 1 further comprising a lock assembly comprising: a washer 'which is disposed within the end cap; a stopper extending between the end cap and the washer; and a spring extending between the stopper and the washer to bias away from the annular portion Stopper. 14. The rotary vane air motor housing assembly of the present invention, further comprising: a first bearing recess disposed in the end wall; a first bearing disposed in the first bearing recess; a bearing cap 'positioned between the end cap and the annular portion, the bearing cap pack 3 - a second bearing pocket; a second bearing disposed in the second bearing pocket; and 160094.doc 201226706 rotor blade An assembly extending between the first bearing pocket and the second bearing recess, the rotor blade assembly comprising: a rotor disposed within the rotor pocket; a plurality of blades disposed in the rotor Inside the slot; a drive shaft extending from the rotor to the first bearing and a stub shaft extending from the rotor into the second bearing. 15. The rotary vane air motor housing assembly of claim 1 wherein the end cap abuts the annular portion along a single mating interface. A rotary vane air motor comprising: a rotor blade assembly comprising: a rotor having an axis of rotation; a plurality of slots disposed in the rotor; a plurality of blades disposed in the plurality of slots a drive shaft 'which extends along the front end of the rotor along the axis of rotation; and a stub shaft 'extending along the axis of rotation from the rear end of one of the ice eyepiece rotors; a two-piece stator housing' Enclosing a tamping 5 mysterious rotor blade assembly, the two-piece stator housing comprising: a cup-shaped portion comprising: - a rotor pocket extending along the axis of rotation; and a first bearing pocket, the ±χ the active pumping extends therethrough; and an end cap portion coupled to the cup portion; and a bearing cap disposed in the cup shape. a second wheel bearing recessed between the end portion and the end cap portion and having the short axis extending through. 160094.doc -4- 201226706 17. The rotary vane air motor of claim 16, wherein the cup portion comprises : Knife. A shoulder that receives the bearing cap such that the second bearing pocket and the first bearing pocket define a width of the rotor pocket. The rotary vane air motor of claim 16, wherein the end cap portion comprises: a beta end plate abutting the bearing cap; and a bad flange extending from the end plate to engage the cup portion . 19. The rotary vane air motor of claim 18, wherein the annular flange is externally engaged with one of the cup portions along a threaded engagement, wherein the threaded engagement is defined between the cup portion and the end cap portion A single - matching interface. 20. The rotary vane air motor of claim 19, wherein the end cap portion further comprises: a spring loaded locking mechanism. 21. The rotary vane air motor of claim 16, wherein the first bearing pocket comprises: a wall portion extending across the rotor pocket; a rotor bore extending through the wall portion; a countersink, Extending around the rotor bore to an exterior of one of the wall portions to face away from the rotor pocket; a mounting surface 'which surrounds the counterbore; and mounting holes' extending into the mounting surface for engaging the mounting surface to A power tool housing. 160094.doc