JP2010059890A - Fluid compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid compressor allowing power supply wiring to be favorably routed while securing the supporting rigidity of the rotor. <P>SOLUTION: A drive means 18 includes a stator 101 having a coil 101A, the power supply wiring 149 extending from the coil 101A, and the rotor 126 which is disposed inside the stator 101 and the end of which is supported by a support plate 102 having a bearing mechanism 124. The power supply wiring 149 is introduced into a terminal space 140 surrounded by a body case 108 and the support plate 102 through a communication hole 112 formed in the support plate 102, and connected to connection terminals 155 provided to the terminal space 140. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fluid compressor.

  In some fluid compressors that draw in, compress, and discharge fluid by the operation of the fluid compression mechanism, the fluid compression mechanism is driven by an electric motor. The wiring of the power supply wiring to the electric motor of such a fluid compressor is arranged. There is a disclosed document (for example, see Patent Document 1).

By the way, among the fluid compressors, there is a booster compressor that pressurizes the compressed fluid from an external compressed fluid supply source and discharges the compressed fluid to the outside. In such a booster compressor, the compressed fluid from the external compressed fluid supply source is introduced into the case body, and the pressure of the compressed fluid supply source is applied to the side opposite to the compression chamber of the piston constituting the fluid compression mechanism. There is a technique (for example, refer to Patent Document 2).
JP 2001-263247 A Japanese Utility Model Publication No. 56-4690

  When the compressed fluid is introduced into the case main body as described above, it is necessary to improve the sealing performance of the case main body. In this case, the wiring of the power supply wiring to the electric motor becomes important. In particular, it has been a problem to satisfactorily route the power supply wiring while ensuring the support rigidity of the rotor of the electric motor.

  Therefore, an object of the present invention is to provide a fluid compressor capable of satisfactorily arranging the power supply wiring while ensuring the support rigidity of the rotor.

  In order to achieve the above object, in the fluid compressor of the present invention, the driving means is disposed in a stator having a coil, a power supply wiring extending from the coil, the inside of the stator, and an end portion having a bearing mechanism. A rotor supported by a support plate, and the power supply wiring is introduced into a terminal space surrounded by the main body case and the support plate from a communication port provided in the support plate, It is connected to a connection terminal provided in the terminal space.

  ADVANTAGE OF THE INVENTION According to this invention, electric power feeding wiring can be wired favorably, ensuring the support rigidity of a rotor.

  Embodiments according to the present invention will be described below with reference to the drawings.

“First Embodiment”
The fluid compressor which is 1st Embodiment which concerns on this invention is demonstrated based on FIG. 1 and FIG.

  FIG. 1 is a side sectional view showing a fluid compressor according to a first embodiment of the present invention. FIG. 2 is a plan sectional view showing the main part of the fluid compressor of the first embodiment according to the present invention, where (a) is after assembly of the end cover, and (b) is before assembly of the end cover. It is shown.

  The fluid compressor 11 of the first embodiment shown in FIG. 1 is supplied with compressed gas (fluid) that has been pressurized in advance from a compressed fluid supply source (not shown) outside the machine body, further compresses the introduced compressed gas, and further This is a booster compressor that boosts the pressure and discharges it outside the machine. The fluid compressor 11 is connected to the crankcase 12 in a posture along the vertical direction with respect to the crankshaft 12, a crankcase 13 that accommodates the crankshaft 12 and supports the crankshaft 12 in a rotatable manner. The cylinder 14 has a cylinder head 15 mounted on the opposite side of the cylinder 14 from the crankcase 13. The fluid compressor 11 includes an electric motor unit 18 that is attached to one horizontal side of the crankcase 13 and drives the crankshaft 12, and an end cover that is attached to the opposite side of the motor unit 18 from the crankcase 13. 19, a case cover 20 that is detachably attached to the horizontally opposite side of the crankcase 13, and a swinging member 21 that is connected to the crankshaft 12 and reciprocates while swinging in the cylinder 14 by eccentric rotation of the crankshaft 12. And. Here, the swing member 21 defines a compression chamber 22 by the cylinder head 15 and the cylinder 14, and reciprocates in the cylinder 14 to expand and contract the compression chamber 22. The cylinder head 15, the cylinder 14, and the swing member 21 constitute a gas compression mechanism (fluid compression mechanism) 23, and the crankshaft 12 and the motor unit 18 serve as a drive mechanism (drive means) 24 that drives the gas compression mechanism 23. It is composed.

  The crankcase 13 is integrally formed into a substantially bottomed cylindrical shape having a substantially cylindrical case body 25 parallel to the crankshaft 12 and a case bottom 26 formed on one side of the case body 25 in the axial direction. Yes.

  The crankcase 13 is installed with the axis of the case body 25 arranged in the horizontal direction, and an installation leg 27 is formed at the lower part of the case body 25, A mounting base 28 for mounting the cylinder 14 is formed on the upper portion of the case body 25. A circular cylinder mounting hole 29 is formed in the center of the mounting base 28 so as to penetrate the crankshaft 12 in the vertical direction and to which the cylinder 14 is mounted. An annular seal groove 31 is formed around the cylinder mounting hole 29 of the mounting base 28 so as to be coaxial with the cylinder mounting hole 29 and recessed in the axial direction. A seal ring 32 made of an elastic material such as rubber is disposed.

  A circular motor fitting portion 35 that fits the motor portion 18 is formed on the outer peripheral side of the case bottom portion 26 on one side in the axial direction of the crankshaft 12 in the crankcase 13. Further, a step-shaped bearing holding portion 38 is formed at the center of the case bottom portion 26 of the crankcase 13, and a through hole 39 penetrating the case bottom portion 26 in the axial direction is formed around the bearing holding portion 38. It is intermittently formed in the circumferential direction. An annular seal groove 40 is formed on the outer peripheral surface of the motor fitting portion 35 so as to be recessed inward in the radial direction. The seal groove 41 is made of an elastic material such as an annular rubber. Is arranged.

  The crankcase 13 is formed with a circular opening hole 45 of the case body 25 on the other side in the axial direction of the crankshaft 12. An annular sealing groove 46 that is coaxial with the opening hole 45 and is recessed in the axial direction is formed at an intermediate position in the radial direction of the end surface of the case body 25 on the opening hole 45 side. A seal ring 47 made of an elastic material such as an annular rubber is disposed.

  In the crankcase 13 described above, the opening hole 45, the motor fitting portion 35, and the cylinder mounting hole 29 are formed independently of each other.

  The cylinder 14 has a substantially cylindrical shape that is attached to the outside of the mounting base portion 28 of the crankcase 13 so as to be perpendicular (specifically vertical) to the axis of the case body 25. In the mounted state, the lower surface of the cylinder 14 comes into contact with the seal ring 32 in the seal groove 31, thereby sealing the gap between the crankcase 13 and the cylinder 14.

  The cylinder head 15 is mounted on the cylinder 14. The cylinder head 15 includes a partition plate 66 disposed on the cylinder 14 and a cylinder head body 68 disposed on the partition plate 66.

  The partition plate 66 is formed with a plurality of suction holes 72 and discharge holes 73 penetrating in the plate thickness direction. A plate-like suction valve 74 capable of opening and closing the suction hole 72 is attached to the partition plate 66 on the cylinder 14 side, and a plate-like discharge valve 75 capable of opening and closing the discharge hole 73 on the cylinder head main body 68 side. Is attached.

  The cylinder head body 68 is formed with two chambers, a suction chamber 81 and a discharge chamber 82. The cylinder head main body 68 is formed with a suction port 83 that communicates the suction chamber 81 with the outside and a discharge port 84 that communicates the discharge chamber 82 with the partition plate 66. In the cylinder head body 68, the suction chamber 81 always communicates with the suction hole 72 of the partition plate 66, and the discharge chamber 82 accommodates the discharge valve 75 and can communicate with the discharge hole 73 of the partition plate 66 via the discharge valve 75. It arrange | positions on the partition plate 66 so that it may become.

  The motor unit 18 of the drive mechanism 24 includes a cylindrical motor body 100 connected to the crankcase 13 by fitting a motor fitting portion 35 of the crankcase 13 to one end side, and a coil 101A. It has a stator 101 fixed to the inner peripheral surface of the body part 100 and a support plate 102 attached so as to close the other end side of the motor body part 100. The seal ring 41 in the seal groove 40 formed in the motor fitting portion 35 of the crankcase 13 contacts the inner peripheral surface of the motor barrel portion 100 when the motor fitting portion 35 is fitted to the motor barrel portion 100. Thus, the gap between the motor body 100 and the motor fitting portion 35 of the crankcase 13 is sealed.

  The support plate 102 is formed with a leg portion 105 for installation at the lower portion, and a boss portion 106 projecting toward the motor body 100 side is formed at an intermediate portion thereof. A circular fitting portion 107 that is coaxial with the boss portion 106 and protrudes toward the motor body portion 100 is formed. A step-shaped bearing holding portion 110 is formed inside the boss portion 106. The fitting portion 107 has a cylindrical shape, and as a result, a thin portion 111 is formed between the boss portion 106 and the fitting portion 107 in the support plate 102. As shown in FIG. 2, the thin portion 111 is formed with a communication port 112 penetrating in the thickness direction only on the left and right sides. Further, as shown in FIG. 1, the fluid compressor 11 is installed on an installation surface such as a floor surface by the legs 105 of the support plate 102 and the legs 27 of the crankcase 13. Here, the crankcase 13, the case cover 20, the motor body 100, the support plate 102, and the end cover 19 are connected to the cylinder 14 of the gas compression mechanism 23 to constitute a main body case 108 that houses the drive mechanism 24. ing.

  The fitting portion 107 is fitted to the motor body 100, and an annular seal groove 115 is formed on the outer peripheral surface thereof so as to be recessed inward in the radial direction. A seal ring 116 made of an elastic material such as an annular rubber is disposed in the seal groove 115, and the seal ring 116 seals a gap between the fitting portion 107 of the support plate 102 and the motor body 100. Also, on the opposite side of the support plate 102 from the motor body 100, a horizontally long oval shape is formed so as to surround a through portion inside the boss portion 106 and both communication ports 112 shown in FIG. 2 outside the boss portion 106. An annular seal groove 117 that is recessed in the axial direction is formed. An oval seal ring 118 is disposed in the seal groove 117.

  As shown in FIG. 1, the motor unit 18 includes a large-diameter bearing 123 held by the bearing holding unit 38 of the crankcase 13 and a small-diameter bearing (bearing mechanism) held by the bearing holding unit 110 of the support plate 102. 124, and a rotor 126 that is disposed inside the stator 101 with a drive shaft 125 that is rotatably held at both ends by these bearings 123 and 124 in the center. The rotor 126 is rotated by the magnetic force generated by the stator 101.

  On the drive shaft 125, a balance weight 135 is attached to a protrusion 130 that protrudes outward from the bearing 123. A key 137 for fixing the balance weight 135 in the rotational direction with respect to the drive shaft 125 is fixed to the protrusion 130 of the drive shaft 125. Here, a screw hole 138 is formed in the balance weight 135 along the radial direction, and the balance weight 135 is fixed to the drive shaft 125 by the bolt 139 being screwed into the screw hole 138 and contacting the key 137. Is done.

  The end cover 19 has a cover main body 142 attached to the opposite side of the support plate 102 from the motor body 100. The cover main body 142 is recessed in a horizontally long oval shape slightly smaller than the seal groove 117 at an intermediate portion inside the seal groove 117 of the support plate 102 when attached to the support plate 102. A recess 143 that defines the terminal space 140 is formed, and a terminal arrangement hole 144 that penetrates the inside and the outside is formed at the bottom of the recess 143. Here, the oval seal ring 118 disposed in the seal groove 117 of the support plate 102 comes into contact with the outside of the recess 143 of the cover main body 142, and the gap between the support plate 102 and the cover main body 142 is sealed. To do.

  The end cover 19 has an airtight terminal 150 for supplying power to the motor unit 18 that is disposed in the terminal arrangement hole 144 of the cover main body 142 so as to be electrically connected to the outside. As shown in FIG. 2, the hermetic terminal 150 includes a terminal body (connection terminal) 155 to which a power supply wiring 149 extending from the coil 101 </ b> A of the stator 101 through the communication port 112 of the support plate 102 is connected, It has a substantially disk-shaped base 156 that holds the terminal body 155 in an airtight manner and a holding body 157 that holds the base 156 in an airtight manner. A flange portion 157A is formed. The airtight terminal 150 is arranged so as to close the terminal arrangement hole 144 of the end cover 19 while projecting one end side of the terminal main body 155 into the terminal space 140 in the terminal arrangement hole 144. A flange portion 157A of the body 157 is hermetically attached to the outer surface of the cover main body 142 by welding the entire periphery. Here, on the surface defining the terminal space 140 of the support plate 102, a clip (fixing means) 162 for fixing the power supply wiring 149 for power supply extending from the coil 101A through the communication port 112 is attached. . The cover main body 142 is fixed to the support plate 102 by a plurality of bolts 163 shown in FIG.

  Here, when the power supply wiring 149 is connected to the hermetic terminal 150, as shown in FIG. 2B, the motor part 18 is pulled out from the communication port 112 of the support plate 102 after assembling. The power supply wiring 149 is fixed to the outer surface of the support plate 102 with a clip 162 while being pulled so that there is no slack on the coil 101A side of the support plate 102. Further, the seal ring 118 is set in the seal groove 117 of the support plate 102.

  On the other hand, with respect to the end cover 19, the airtight terminal 150 is fixed in advance to the cover main body 142 by welding, and the airtight terminal 150 of the end cover 19 is in a state where the end cover 19 is separated from the support plate 102. A connector portion 149 </ b> A at the end of the power supply wiring 149 is connected to the terminal body 155. Then, as shown in FIG. 2A, the end cover 19 is supported on the support plate 102 while inserting the extra length portion for the connection of the power supply wiring 149 into the recess 143 of the end cover 19, that is, the terminal space 140. And are fixed with a plurality of bolts 163. As a result, the power supply wiring 149 is held in a state in which the coil 101 </ b> A side is not slacker than the support plate 102, and slack is formed on the terminal space 140 side than the support plate 102.

  As shown in FIG. 1, the case cover 20 closes the opening hole 45 for mounting a component, and has a flat disk shape that abuts the end face of the crankcase 13 on the opening hole 45 side at the outer peripheral portion. . The seal ring 47 of the seal groove 46 formed around the opening hole 45 of the crankcase 13 contacts the case cover 20 and seals the gap between the crankcase 13 and the case cover 20. The case cover 20 is fixed to the crankcase 13 by a plurality of bolts 173 on the outer side of the seal portion by the seal ring 47.

  The crankshaft 12 is formed by fitting the projecting portion 130 of the drive shaft 125 into the drive shaft 125 of the motor unit 18 and the eccentric hole 175 formed eccentrically with respect to the outer diameter center that is the center with respect to the outer diameter. A substantially disc-shaped crank member 176 that is attached to the shaft 125 in an eccentric state, and the key 137 that integrates the crank member 176 with respect to the drive shaft 125 in the rotational direction. Thus, the motor unit 18 is a direct drive type that directly drives the crankshaft 12 without a belt or the like. Here, the crank member 176 is fixed to the balance weight 135 by the bolt 180. Since the balance weight 135 is fixed to the drive shaft 125 by the bolt 139 as described above, the crank member 176 is fixed to the balance weight 135 by the crank member. 176 is fixed to the drive shaft 125.

  A bearing 185 is provided so that the crank member 176 of the crankshaft 12 is fitted inside, and the swinging member 21 has a connecting rod 186 whose one end is rotatably connected to the crank member 176 via the bearing 185. A spacer 187 that is detachably provided at the other end of the connecting rod 186, a piston head 188 that is detachably provided on the spacer 187, and a piston head 188 and a cylinder 14 that are disposed on the outer peripheral side of the piston head 188. And a lip seal 189 that seals the gap with the bore 58.

  The connecting rod 186 is formed on one end side and has an annular large end 195 into which the bearing 185 described above is fitted. The connecting rod 186 has a relatively elongated shape and extends radially outward from the large end 195. The extending portion 196 is formed integrally with the extending portion 196 at the tip of the extending portion 196 and has a disk-shaped small end portion 197 formed so as to coincide with the central axis of the extending portion 196.

  The spacer 187 is formed with a lower fitting recess 204 that is recessed in a circular shape within a predetermined range in the radial center on one side in the axial direction, and the small end portion of the connecting rod 186 described above is formed in the lower fitting recess 204. 197 is fitted. In addition, the spacer 187 has an upper fitting recess 206 that is recessed in a circular shape in a predetermined range in the radial direction on the other side in the axial direction.

  The piston head 188 has a disk shape having the same diameter as the outer diameter of the spacer 187, and a fitting projection that protrudes in the axial direction by forming a coaxial annular shape in a predetermined central range in the radial direction on one side of the axial direction. A portion 212 is formed. The piston head 188 is fitted into the upper fitting concave portion 206 of the spacer 187 at the fitting convex portion 212.

  The lip seal 189 is formed in a state where the fitting convex portion 212 of the piston head 188 is fitted into the upper fitting concave portion 206 of the spacer 187 and the peripheral portion of the fitting convex portion 212 of the piston head 188 and the fitting concave portion 206 of the spacer 187. Is sandwiched between the surrounding parts. The lip seal 189 is an annular seal ring made of an elastic material such as PTFE (tetrafluoroethylene resin). The inner peripheral side is a flat plate ring sandwiched between the spacer 187 and the piston head 188, and the outer peripheral side is , Projecting outward, bent to the piston head 188 side in the thickness direction, and formed into an annular shape covering the outer peripheral side of the piston head 188.

  Here, the spacer 187 is fitted to the small end portion 197 of the connecting rod 186, the lip seal 189 is disposed on the spacer 187, and the piston head 188 is attached to the spacer 187 so as to sandwich the lip seal 189. In this state, the piston head 188, the lip seal 189, the spacer 187, and the connecting rod 186 are integrally connected by the plurality of screws 220 to form the swing member 21.

  In the swing member 21, the piston head 188, the spacer 187, and the lip seal 189 sandwiched between the piston head 188 and the lip seal 189 disposed inside the cylinder 14 constitute a piston portion 222. At this time, the lip seal 189 has an annular lip portion 219. By slidingly contacting the bore 58 of the cylinder 14 with a tightening margin, the cylinder 14 and the piston portion 222 are basically hermetically sealed. A portion surrounded by the piston portion 222, the cylinder 14, and the partition plate 66 of the cylinder head 15 is the compression chamber 22 described above.

  The piston portion 222, the cylinder 14, and the crankcase 13 define a crank chamber 223 that houses the crankshaft 12.

  Here, as shown in FIG. 1, the main body case 108 includes a cylinder attachment hole 29 in which the cylinder 14 is attached, a motor fitting portion 35 in which the motor portion 18 is attached, and a component attachment opening. Since the holes 45 are provided independently of each other, the connecting portion between the crankcase 13 and the cylinder 14 can be sealed by the seal ring 32 provided around the cylinder mounting hole 29, and the motor fitting portion 35 can be sealed. The connecting portion between the crankcase 13 and the motor portion 18 can be sealed by the seal ring 41 provided around the opening, and the crankcase 13 and the case cover 20 can be sealed by the seal ring 47 provided around the opening hole 45. The connecting portion can be sealed. In addition, since the connecting portion between the support plate 102 and the motor body 100 is also sealed with the seal ring 116 and the connecting portion between the support plate 102 and the end cover 19 is sealed with the seal ring 118, The main body case 108 has a sealed structure that basically prevents gas from leaking to the outside.

  An inlet pipe 225 is connected to the suction port 83 of the cylinder head main body 68 for introducing a gas such as air or nitrogen whose pressure has been previously increased from the atmospheric pressure from an external compressed fluid supply source. A branch pipe 226 is branched from the midway position of the introduction pipe 225, and this branch pipe 226 is connected to the crank chamber 223 via the case cover 20. As a result, the gas for compression that has been previously pressurized from the external compressed fluid supply source is introduced into the fluid compressor 11 also into the crank chamber 223 via the branch pipe 226. Therefore, the pressure of this gas is applied to the side opposite to the compression chamber 22 of the piston part 222, and the load applied to the connecting rod 186, the bearing 185, etc. Reduce.

  In the above fluid compressor 11, the crank member 176 of the crankshaft 12 rotates eccentrically by the rotation of the drive shaft 125 driven by the motor unit 18, and the swinging member 21 is driven by the eccentric rotational movement of the crank member 176. The piston portion 222 including the piston head 188, the spacer 187, and the lip seal 189 is guided by the bore 58 of the cylinder 14 and reciprocates in the axial direction of the cylinder 14.

  In the suction stroke to the bottom dead center where the piston portion 222 is separated from the partition plate 66, the compression chamber 22 is expanded by the movement of the piston portion 222, the discharge hole 73 is closed by the discharge valve 75, and the suction hole is closed by the suction valve 74. The compressed gas from the compressed fluid supply source is introduced into the compression chamber 22 from the suction port 83 through the suction chamber 81 and the suction hole 72 with the 72 in an open state. Subsequently, in the compression stroke up to the top dead center where the piston portion 222 approaches the partition plate 66, the compression chamber 22 is reduced by the movement of the piston portion 222 in the direction of the partition plate 66, and the suction hole 72 is opened by the suction valve 74. The discharge hole 73 is opened by the discharge valve 75 and the compressor body is further compressed and discharged from the compression chamber 22 to the discharge port 84 via the discharge chamber 82.

  According to the fluid compressor 11 of the first embodiment described above, the drive mechanism 24 is arranged on the inner side of the stator 101, the stator 101 having the coil 101A, the power supply wiring 149 extending from the coil 101A, and the end thereof. And a rotor 126 supported by a support plate 102 having a bearing 124, and a power supply wiring 149 is connected to the end cover 19 of the main body case 108 and the support plate 102 from a communication port 112 provided in the support plate 102. Are connected to a terminal body 155 provided in the terminal space 140, and the power supply wiring 149 is well arranged while ensuring the support rigidity of the rotor 126 by the support plate 102. Can be searched.

  Further, since the power supply wiring 149 extending from the coil 101 </ b> A is guided to the outside of the motor unit 18 through the communication port 112 of the support plate 102, the wiring status in the motor unit 18 is confirmed through the communication port 112. Therefore, the assembling property can be improved and the inspection time can be shortened.

  Further, when attaching the end cover 19 to the support plate 102, the extra length portion of the power supply wiring 149 can be accommodated in the terminal space 140 of the end cover 19, so that the power supply wiring 149 is connected to the end cover 19 and the support plate 102. Can be prevented from being caught between. Therefore, the reliability of the power supply wiring 149 can be improved.

  Further, since the power supply wiring 149 is fixed to the surface of the support plate 102 on the terminal space 140 side by the clip 162, the power supply wiring 149 is supported with the end cover 19 when the end cover 19 is attached to the support plate 102. It is possible to reliably prevent pinching with the plate 102. Therefore, the reliability of the power supply wiring 149 can be further improved.

  Further, even when the main body case 108 has a sealed structure as described above, the power supply wiring 149 can be routed satisfactorily without impairing the sealing performance.

  Further, the power supply wiring 149 is held in a state in which the coil 101 </ b> A side is not loosened more than the support plate 102, and is loosened on the terminal space 140 side than the support plate 102, so that a bearing that is a rotating portion of the motor unit 18 is formed. 124 and the rotor 126 can be prevented from coming into contact with the power supply wiring 149. Therefore, the reliability of the motor unit 18 including the power supply wiring 149 can be improved.

  In addition, since the general-purpose hermetic terminal 150 can be used, the cost can be reduced.

“Second Embodiment”
Next, a second embodiment will be described mainly based on FIG. 3 and FIG. FIG. 3 is a plan cross-sectional view showing the main part of the fluid compressor of the second embodiment. FIG. 4 is an exploded perspective view showing a main part of the fluid compressor of the second embodiment. In addition, about the site | part which is common in 1st Embodiment, it represents with the same name and the same code | symbol.

  In the second embodiment, as shown in FIGS. 3 and 4, the airtight terminal 150 is not welded to the outside of the end cover 19, but is provided inside the end cover 19.

  That is, in the second embodiment, a seal stepped portion 145 having a diameter larger than that of the terminal arranging hole 144 and recessed in the axial direction is formed on the concave portion 143 side of the terminal arranging hole 144. A seal ring 146 made of an elastic material such as an annular rubber is disposed.

  Further, in the second embodiment, the hermetic terminal 150 is configured such that the holding body 157 is fitted inside the seal ring 146 on the side opposite to the flange portion 157A. The ring 146 is sandwiched between the seal stepped portion 145. Here, the main body case 108 has a sealed structure, and since compressed gas is introduced also into the terminal space 140 in the end cover 19, the pressure in the terminal space 140 pushes the airtight terminal 150 outward. As a result, the flange portion 157A presses the seal ring 146 against the seal step portion 145. Thereby, the seal ring 146 seals the gap between the hermetic terminal 150 and the cover main body 142. Note that the end cover 19 of the second embodiment has a thick boss portion 19 </ b> A around the terminal arrangement hole 144.

  According to the fluid compressor 11 of the second embodiment described above, the gap between the airtight terminal 150 and the cover body 142 can be satisfactorily sealed using the pressure in the terminal space 140, and the case body 108 can be sealed. Sealability can be secured.

  In addition, since welding of the airtight terminal 150 is not required, the dedicated equipment for welding is not required, and the manufacturing cost can be reduced.

“Third Embodiment”
Next, a third embodiment will be described mainly based on FIG. 5 and FIG. FIG. 5 is a plan cross-sectional view showing the main part of the fluid compressor of the third embodiment. FIG. 6 is an exploded perspective view showing a main part of the fluid compressor of the third embodiment. In addition, about the site | part which is common in 2nd Embodiment, it represents with the same name and the same code | symbol.

  In the third embodiment, as shown in FIGS. 5 and 6, as in the second embodiment, the airtight terminal 150 is not welded to the outside of the end cover 19, but is provided inside the end cover 19. It has been. And in 3rd Embodiment, it has further the square frame-shaped attachment board 151 which attaches the airtight terminal 150 to the cover main body 142. FIG.

  That is, as in the second embodiment, the hermetic terminal 150 is configured such that the holding body 157 is fitted inside the seal ring 146 on the side opposite to the flange portion 157A. Thus, the seal ring 146 is sandwiched between the seal stepped portion 145. At that time, the pressure in the terminal space 140 pushes the hermetic terminal 150 outward, so that the flange portion 157A presses the seal ring 146 against the seal step portion 145.

  Then, the mounting plate 151 is disposed on the side opposite to the cover main body 142 of the airtight terminal 150 in this state, and is attached to the cover main body 142 with a plurality of screws 160. As a result, the mounting plate 151 is attached to the airtight terminal. The flange portion 157 </ b> A of 150 is pressed to prevent the terminal arrangement hole 144 from coming off.

  According to the fluid compressor 11 of the third embodiment described above, in order to seal the gap between the hermetic terminal 150 and the cover body 142 using the pressure in the terminal space 140 as in the second embodiment, Equipment for welding is not required, and manufacturing costs can be reduced. In addition, even when no pressure is introduced into the terminal space 140 during maintenance or the like, the attachment plate 151 can regulate the removal of the airtight terminal 150 from the terminal arrangement hole 144.

It is a sectional side view showing the fluid compressor of a 1st embodiment concerning the present invention. It is a plane sectional view showing the important section of the fluid compressor of a 1st embodiment concerning the present invention. It is a plane sectional view showing the important section of the fluid compressor of a 2nd embodiment concerning the present invention. It is a disassembled perspective view which shows the principal part of the fluid compressor of 2nd Embodiment which concerns on this invention. It is a plane sectional view showing an important section of a fluid compressor of a 3rd embodiment concerning the present invention. It is a disassembled perspective view which shows the principal part of the fluid compressor of 3rd Embodiment which concerns on this invention.

Explanation of symbols

11 Fluid compressor 23 Airframe compression mechanism (fluid compression mechanism)
24 Drive mechanism (drive means)
101 Stator 101A Coil 102 Support Plate 108 Body Case 112 Communication Port 124 Bearing (Bearing Mechanism)
126 rotor
140 Terminal space 149 Power supply wiring 155 Terminal body (connection terminal)
162 clip (fixing means)

Claims (4)

A fluid compression mechanism;
Drive means for driving the fluid compression mechanism;
A fluid compressor having a body case connected to the fluid compression mechanism and containing the driving means;
The driving means includes a stator having a coil, a power supply wiring extending from the coil, and a rotor disposed inside the stator and supported by a support plate having an end portion having a bearing mechanism,
The power supply wiring is introduced from a communication port provided in the support plate into a terminal space surrounded by the main body case and the support plate, and is connected to a connection terminal provided in the terminal space. A fluid compressor characterized by the above.   2. The fluid compressor according to claim 1, wherein the power supply wiring is fixed to a surface of the support plate on the terminal space side by a fixing unit.   The fluid compressor according to claim 1, wherein the main body case has a sealed structure.   4. The power supply wiring according to claim 1, wherein the coil side of the power supply wiring is held in a state without slack, and the slack is formed on the terminal space side of the support plate. 5. The fluid compressor according to one item.

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