JP2010077891A - Vane rotary compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vane rotary compressor preventing a pin from coming off from the press-fit part of a rotor and allowing the relaxation of tolerance of press-fit. <P>SOLUTION: The vane rotary compressor 100 comprises a cylinder chamber 2 including an ellipse inner wall shape, a rotor 3 rotatably disposed in the cylinder chamber 2, a vane 4 retained with the rotor 3 and sliding on the inner wall surface 2a of the cylinder chamber 2, accompanying the rotation of the rotor 3. A vane groove 5 holding the vane 4 is provided on the rotor 3. The pin 6 is press-fitted in the bottom 5a of the vane groove 5. A spring 7 pressing the vane 4 to an outer circumference direction is disposed at the circumference surface 6a of the pin 6. The compressor is provided with a means in which the spring 7 energizes the pin 6 to the bottom 5a of the vane groove 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vane rotary compressor, and more particularly to a pin.

  Patent Document 1 describes a vane rotary compressor. In this vane rotary compressor, a cylinder chamber having an elliptical inner wall shape, a rotor rotatably disposed in the cylinder chamber, and the rotor are held by the rotor so that the inner wall surface of the cylinder chamber slides as the rotor rotates. Made up of made vanes. The rotor is provided with a vane groove for accommodating the vane, and a support plate for supporting the pin is provided at the bottom of the vane groove. The pin is inserted into the support plate and caulked to thereby fix the pin to the support plate. It is fixed. A spring for pressing the vane in the outer peripheral direction is disposed on the peripheral surface of the pin.

Then, when the rotor rotates in the cylinder chamber, the vane protrudes from the vane groove by the biasing force of the spring, the tip portion slides on the inner wall of the cylinder chamber, and is introduced into the space surrounded by the inner wall of the cylinder chamber and the vane The refrigerant is compressed.
Reality 8-538

  However, in the above conventional example in which the pin is inserted into the support plate and fixed, and the pin is fixed to the support plate, if the crimped portion is loosened due to vibration or the like, the pin is rattled by the centrifugal force due to the rotation of the rotor. In the worst case, there is a problem that the pin is detached from the support plate.

  Thus, it has been proposed to firmly fix the pin to the rotor by press-fitting the pin into a hole provided in the rotor. In this case, the hole opened in the rotor is set so that a predetermined allowance is obtained with respect to the diameter of the pin.

  However, the centrifugal force caused by the rotation of the pin press-fitted into the rotor to compress the refrigerant causes the pin to come out of the press-fitted portion, and the held spring is buckled, causing a problem in the compressor. was there.

  Moreover, there is a possibility that the pin may be bitten when the pin comes out of the press-fitting portion.

  Furthermore, if the accuracy of press-fitting is increased in order to prevent the pins from coming out of the press-fitting portion, the press-fitting operation takes time and manufacturing becomes difficult.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vane rotary compressor that can prevent a pin from slipping out from a press-fitting portion of a rotor and can loosen a press-fitting tolerance.

  The invention of claim 1 includes a cylinder chamber 2 having an elliptical inner wall shape, a rotor 3 rotatably disposed in the cylinder chamber 2, and an inner wall surface 2a of the cylinder chamber 2 as the rotor 3 rotates. The vane 4 is held by the rotor 3 so as to move. The rotor 3 is provided with a vane groove 5 for accommodating the vane 4. A pin 6 is press-fitted into the bottom 5 a of the vane groove 5. 6 is a vane rotary compressor 100 in which a spring 7 that presses the vane 4 in the outer circumferential direction is disposed on the peripheral surface 6a of the vane 6, and the spring 7 biases the pin 6 toward the bottom 5a of the vane groove 5. It is characterized by providing means.

  The invention of claim 2 is the vane rotary compressor 100 according to claim 1, wherein the biasing means is provided with an enlarged diameter portion 8 on the outer periphery of only the pin 6 on the bottom 5a side of the vane groove 5, The spring 7 is arranged between the enlarged diameter portion 8 and the vane 4.

  A third aspect of the present invention is the vane rotary compressor 100 according to the second aspect, wherein the enlarged diameter portion 8 is a flange portion 9 provided on the outer periphery of the pin 6.

  A fourth aspect of the present invention is the vane rotary compressor 100 according to the second aspect of the present invention, wherein the enlarged diameter portion 8 is formed by inserting the press-in portion 10 of the pin 6 into the bottom portion 5a of the vane groove 5 with the vane 4. It is characterized by the stepped portion 12 having a diameter larger than that of the supporting main body portion 6b and formed between them.

  The invention according to claim 5 is the vane rotary compressor 100 according to claim 1, wherein the biasing means is provided on the outer periphery of the pin 6 on the bottom 5 a side of the vane groove 5, It is a groove portion 14 into which the end portion 13 is fitted.

  According to the present invention, by providing the means for urging the pin to the rotor side by the spring, it is possible to prevent the pin from coming off from the press-fitting portion, and the spring can be reliably supported. Further, since the pin does not come off from the press-fit portion, the pin is not bitten. Furthermore, since the pin is securely press-fitted into the rotor and inserted into the spring, the spring does not buckle and a compressor failure can be prevented.

  Hereinafter, the detail of the vane rotary compressor which concerns on this invention is demonstrated based on embodiment shown to drawing.

  FIG. 1 is an overall cross-sectional view of a vane rotary compressor 100 according to the present invention. FIG. 2 is an enlarged cross-sectional view of the main part of the present invention. FIG. 3 is a diagram showing this embodiment (a) and other embodiments (b), (c), and (d). FIG. 4 is an enlarged sectional view of a main part according to the present invention.

  As shown in FIG. 1, the vane rotary compressor 100 of this embodiment is comprised mainly by the compressor 1, the electric motor 1a (electric motor 1a), and the inverter 1b. The housing 50 of the vane rotary compressor 100 includes a front housing 50a, a middle housing 50b, and a rear housing 50c, which are coupled to each other so that the compressor 1 and the electric motor 1a are contained in a sealed internal space. And is housed. A space in the housing 50 is partitioned by the compressor 1, and a refrigerant suction chamber is provided on one side (left side in the figure) with the compressor 1 interposed therebetween, and refrigerant discharge is performed on the other side (right side in the figure). A room is provided. An electric motor 1a is disposed in the refrigerant discharge chamber.

  In the present embodiment, the compressor 1 is a rotary compressor 1, and mainly includes a cylinder block 16, a rotor 3, a vane 4, and a pair of side blocks 15 as shown in FIG. 2. Yes. The cylinder block 16 has a cylinder chamber 2 having a noncircular (elliptical) inner wall surface 2a having a smooth inner periphery, and the rotor 3 is rotatably arranged and accommodated in the cylinder chamber 2. Yes.

  The rotor 3 has a plurality of vane grooves 5 formed radially at equal intervals in the circumferential direction. A plurality of vanes 4 are accommodated in the vane grooves 5 together with springs 7 and pins 6 for preventing the springs 7 from buckling. The spring 7 is disposed between the lower end portion 4 a of the vane 4 and the bottom portion 5 a side of the vane groove 5, and is disposed on the peripheral surface 6 a of the pin 6 press-fitted into the bottom portion 5 a of the vane groove 5. The spring 7 constantly urges the vane 4 accommodated in the vane groove 5 outward of the rotor 3, that is, toward the inner wall surface 2 a of the cylinder chamber 2.

  As shown in FIG. 4, a pin moving hole 17 into which the pin 6 can be inserted is formed in the vane 4, and the opening on the lower end side of the pin moving hole 17 is expanded to form a stepped portion 12. And the vane 4 is urged | biased from the vane groove | channel 5 by the end of the spring 7 arrange | positioned on the surrounding surface of the pin 6 contact | abutting to the step part 12. FIG.

  As shown in FIG. 3 (a), the pin 6 has a spring 7 disposed on its peripheral surface, a body portion 6b inserted into and removed from the pin movement hole 17, and a vane groove formed integrally with the body portion 6b. 5 includes a press-fitting portion 10 that is press-fitted into a press-fitting hole 18 formed in the bottom portion 5a, and a flange portion 9 that is formed between the main body portion 6b and the press-fitting portion 10. The flange portion 9 is in contact with the opening edge portion of the press-fit hole 18 on the press-fit portion 10 side, and the other end side of the body portion 6b side spring 7 is in contact. In this state, the spring 7 urges the flange portion 9 toward the bottom portion 5 a and urges the vane 4 outward of the rotor 3.

  Another example of the press-fitting structure of the next pin 6 to the rotor 3 will be described.

  In the pin 6 shown in FIG. 3B, the press-fit portion 10 of the pin 6 has a diameter larger than that of the main body portion 6 b, and a step portion 12 is formed by the main body portion 6 b and the enlarged diameter portion 8. The side is in contact with the stepped portion 12. In this state, the spring 7 urges the pin 6 toward the rotor 3 side while urging the pin 6 toward the rotor 3 side and urges the vane 4 toward the outside of the rotor 3.

  The pin 6 shown in FIG. 3 (c) is a combination of FIG. 3 (a) and FIG. 3 (b), and a spring 7 is disposed on the peripheral surface of the pin 6 and is inserted into and removed from the pin moving hole 17. Formed between the main body 6b and the press-fitting part 10, and a press-fitting part 10 that is integrally formed with the main-body part 6b and press-fitted into a press-fitting hole 18 formed in the bottom part 5a of the vane groove 5. It is comprised with the flange part 9 made. Further, the press-fit portion 10 of the pin 6 has a diameter larger than that of the main body portion 6 b, and a step portion 12 is formed by the main body portion 6 b and the enlarged diameter portion 8. The flange portion 9 is in contact with the opening edge portion of the press-fit hole 18 and the enlarged diameter portion 8 on the press-fit portion 10 side, and the other end side of the main body portion 6b side spring 7 is in contact. In this state, the spring 7 urges the flange portion 9 toward the bottom portion 5 a and urges the vane 4 outward of the rotor 3.

  In the example of the pin 6 shown in FIG. 3D, the press-fit portion 10 has substantially the same diameter as the main body portion 6b, and a groove portion 14 is provided along the circumferential direction on the outer peripheral surface of the main body portion 6b on the press-fit portion 10 side. The end portion 13 on the other end side of the spring 7 is fitted in the groove portion 14. In this state, the spring 7 urges the press-fit portion 10 of the pin 6 toward the press-fit hole 18 and urges the vane 4 outward of the rotor 3.

  According to the present embodiment, by providing means for biasing the pin 6 toward the bottom 5a side of the vane groove 5 of the rotor 3 by the spring 7, it is possible to prevent the pin 6 from coming off from the press-fit portion 10, Since the spring 7 can be reliably supported, the buckling of the spring 7 can be prevented, and the malfunction of the compressor can be prevented beforehand.

  Further, since the pin 6 is prevented from being pulled out by the spring 7, it is not necessary to increase the press-fitting accuracy, and the press-fitting work does not take time, so that the manufacture becomes easy.

1 is an overall cross-sectional view of a vane rotary compressor 100 according to the present invention. The expanded sectional view of the II-II line of FIG. (A) is a principal part expanded sectional view of this embodiment. (B), (c), (d) is principal part sectional drawing of other embodiment. The principal part expanded sectional view which concerns on this invention.

Explanation of symbols

100 Vane Rotary Compressor 2 Cylinder Chamber 3 Rotor 4 Vane 5 Vane Groove 5a Bottom 6 Pin 6a Circumferential Surface 7 Spring

Claims (5)

A cylinder chamber (2) having an elliptical inner wall shape, a rotor (3) rotatably disposed in the cylinder chamber (2), and an inner wall surface of the cylinder chamber (2) as the rotor (3) rotates (2a) and a vane (4) held by the rotor (3) so as to slide. The rotor (3) is provided with a vane groove (5) for accommodating the vane (4). A pin (6) is press-fitted into the bottom (5a) of the groove (5), and a spring (7) for pressing the vane (4) in the outer circumferential direction is arranged on the peripheral surface (6a) of the pin (6). A vane rotary compressor (100),
A vane rotary compressor (100), wherein the spring (7) is provided with means for urging the pin (6) toward the bottom (5a) of the vane groove (5). A vane rotary compressor (100) according to claim 1,
The biasing means includes a pin (6) on the bottom (5a) side of the vane groove (5) provided with an enlarged diameter portion (8) on the outer periphery, and the spring (7) is replaced with the enlarged diameter portion (8). Vane rotary compressor (100), characterized in that it is arranged between the vane and the vane (4). A vane rotary compressor (100) according to claim 2,
The vane rotary compressor (100), wherein the enlarged diameter portion (8) is a flange portion (9) provided on an outer periphery of the pin (6). A vane rotary compressor (100) according to claim 2,
The diameter-expanded portion (8) expands the press-fit portion (10) of the pin (6) that is press-fitted into the bottom portion (5a) of the vane groove (5) from the main body portion (6b) that supports the vane (4). Vane rotary compressor (100), characterized in that it is a step (12) formed between them. A vane rotary compressor (100) according to claim 1,
The biasing means is provided on the outer periphery of the pin (6) on the bottom (5a) side of the vane groove (5), and the groove (14) into which the terminal portion (13) of the spring (7) is fitted. A vane rotary compressor (100), characterized in that

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