JP4209691B2 - Variable displacement swash plate compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a variable displacement swash plate compressor that controls the discharge capacity of a refrigerant.
[0002]
[Prior art]
Conventionally, a swing swash plate type variable displacement compressor as disclosed in Patent Document 1 is known as a compressor used in a vehicle air conditioner.
[0003]
The swing swash plate type variable capacity compressor adjusts the amount of refrigerant discharged from the swing swash plate type variable capacity compressor by changing the compression chamber volume in the cylinder, and the suction pressure of the swing swash plate type variable capacity compressor. Is set to a predetermined value. Setting the suction pressure to a predetermined value in this way sets the refrigerant pressure at the outlet of the evaporator to a predetermined value, resulting in a heat load determined by the outside air temperature, solar radiation, vehicle interior set temperature, vehicle interior temperature, etc. The air conditioning output can be changed accordingly.
[0004]
As a result, it is possible to reduce the ON / OFF of the swing swash plate type variable displacement compressor that has been conventionally performed by the magnet clutch. Therefore, the air blown into the vehicle interior when the swing swash plate type variable displacement compressor is turned ON / OFF. The rapid temperature change and the rapid load fluctuation to the engine are prevented, and the comfort during driving can be improved.
[0005]
Further, the swing swash plate type variable displacement compressor converts the rotary motion transmitted from the engine transmitted to the drive shaft into the reciprocating motion of the piston via the rotary shaft, lug plate, and rotary swing swash plate. The swing swash plate type variable capacity compressor forms a long hole in a support arm provided on an outer peripheral portion of a lug plate fitted on a rotary shaft supported so as to penetrate the crank chamber, and the long hole The connecting pin is reciprocally engaged with the connecting pin, and a swinging swash plate that rotates integrally with the lug plate is mounted on the connecting pin so as to be swingable in the front-rear direction around the connecting pin. . Further, the refrigerant gas sucked from the suction chamber by the swinging motion of the swinging swash plate in the front-rear direction is compressed in the cylinder bore and discharged to the discharge chamber. An adjusting screw for restricting the minimum capacity position where the inclination angle of the swing swash plate is minimized is appropriately selected from those having different lengths and screwed into the lower end portion of the long hole.
[0006]
By adopting such a configuration, in order to meet the minimum discharge capacity required by the vehicle type or the cooling device on which the compressor is mounted, the position adjustment of the minimum capacity position at which the inclination angle of the swash plate is minimized is adjusted to the compressor. It can be easily performed in the assembly process.
[0007]
[Patent Document 1]
Japanese Utility Model Publication No. 6-22580
[0008]
[Problems to be solved by the invention]
However, in the above-described prior art, the timing at which the peak of the cylinder pressure during operation occurs differs between the low rotation range and the high rotation range, so that the rotation oscillation tilt that the compression reaction force generated when the piston compresses the refrigerant acts. By changing the position of the plate, the kidney part is rattled, causing noise and vibration.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a variable displacement swash plate compressor that prevents noise and vibration generated by rattling of the kidney during operation.
[0010]
[Means for Solving the Problems]
In the first aspect of the present invention, a drive shaft having a substantially cylindrical shape and rotatably fitted in the crank chamber, a lug plate fixed to the drive shaft and rotating together with the drive shaft, A drive swash plate having a disk shape, slidably supported by the drive shaft while penetrating through the central portion of the disk shape, and capable of freely changing an inclination angle with respect to the drive shaft; A slot provided in one of the lug hinge provided at one end of the lug plate and the swash plate hinge provided at one end of the drive swash plate, and provided in the other of the lug hinge and the swash plate hinge The variable displacement swash plate compressor includes a through hole, a long cylindrical hole, a substantially cylindrical journal pin supported by the insertion hole, and a kidney portion that connects the lug plate and the drive swash plate. In the capacity variable swash plate Compressor in the working state, the rotational driving force of the lug plate, the journal pin is in contact held in the inner peripheral wall of the long hole Thus, the drive swash plate is held in an inclined state with respect to the rotation surface of the lug plate. It is characterized by that.
[0011]
The invention according to claim 2 is the variable displacement swash plate type compressor according to claim 1, wherein the kidney portion is provided along a circumferential tangent to the rotation surface of the lug plate. Tapered taper shape on the hole and the long hole The journal pin is inserted into the insertion hole and the long hole so that the tapered side is positioned forward in the rotational direction of the lug plate, In addition, when the variable displacement swash plate compressor is in operation, the taper portion of the journal pin is held in contact with the inner peripheral wall of the long hole by a compression reaction force.
[0012]
The invention according to claim 3 is the variable displacement swash plate compressor according to claim 1, wherein the kidney portion approaches the lug plate from the front side to the rear side in the rotational direction of the lug plate. When the journal pin having a substantially cylindrical shape is inserted into the insertion hole that is inclined in the direction and the variable displacement swash plate compressor is in operation, the journal pin is attached to the inner peripheral wall of the long hole by a compression reaction force. The cylindrical portion is abutted and held.
[0013]
According to a fourth aspect of the present invention, in the variable displacement swash plate compressor according to the first aspect, the kidney portion is separated from the lug plate from the front side to the rear side in the rotational direction of the lug plate. When a journal pin having a substantially cylindrical shape is inserted into the long hole provided in a slanted direction, and the variable displacement swash plate compressor is in an operating state, the journal pin is attached to the inner peripheral wall of the long hole by a compression reaction force. The cylindrical portion is abutted and held.
[0014]
【The invention's effect】
According to the first aspect of the present invention, in the capacity variable swash plate type compressor in the operating state, the journal pin is rattled by the journal pin being held in contact with the inner peripheral wall of the long hole by the rotational driving force of the lug plate. Can be prevented and generation of sound and vibration can be prevented.
[0015]
According to invention of Claim 2, in addition to the effect of Claim 1, the journal pin provided with the taper taper shape Insert into the insertion hole and the long hole so that the tapered side is located in front of the rotation direction of the lug plate By doing so, an increase in manufacturing cost can be prevented without complicating the structure of the kidney part.
[0016]
According to the invention of claim 3, in addition to the effect of claim 1, the insertion hole is provided so as to be inclined in a direction approaching the lug plate from the front side to the rear side in the rotation direction of the lug plate. Thus, an increase in manufacturing cost can be prevented without complicating the structure of the kidney portion.
[0017]
According to the fourth aspect of the invention, in addition to the effect of the first aspect, the long hole is provided to be inclined in a direction away from the lug plate from the front side to the rear side in the rotation direction of the lug plate. Thus, an increase in manufacturing cost can be prevented without complicating the structure of the kidney portion.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
A variable displacement swash plate compressor as an embodiment of the present invention will be described in detail with reference to the drawings. 1 is an overall cross-sectional view of a variable displacement swash plate compressor according to an embodiment of the present invention, FIGS. 2 to 5 are cross-sectional views of a kidney portion of the first to fourth embodiments, and FIG. 6 is a kidney of the first embodiment. It is the figure which showed the sound pressure measurement result at the time of a capacity | capacitance variable swash plate type compressor provided with a part.
[0019]
As shown in FIG. 1, the variable displacement swash plate compressor 1 includes a cylinder block 10 having a plurality of cylinders 11 arranged at equal intervals in the circumferential direction, and a cylinder block 10 joined to a front end face of the cylinder block 10. And a rear housing 17 joined to the rear end face of the cylinder block 10 via a valve plate 14 to form a suction chamber 15 and a discharge chamber 16. The cylinder block 10, the front housing 13 and the rear housing 17 are fastened and fixed by a plurality of through bolts 18.
[0020]
The valve plate 14 is provided with a suction hole 15 a that connects the cylinder 11 and the suction chamber 15, and a discharge hole (not shown) that connects the cylinder 11 and the discharge chamber 16.
[0021]
A valve mechanism that opens and closes the suction hole 15a on the cylinder block 10 side of the valve plate 14 (Not shown) On the other hand, on the rear housing 17 side of the valve plate 14, a valve mechanism for opening and closing the discharge hole (Not shown) Is provided. A gasket is interposed between the valve plate 14 and the rear housing 17 so that the airtightness of the suction chamber 15 and the discharge chamber 16 is ensured. In addition, an O-ring is sandwiched between the periphery of the valve plate 14 and the joint surface between the rear housing 17 and the cylinder block 10 to prevent leakage of refrigerant to the outside.
[0022]
A drive shaft 20 is pivotally supported via bearings in the support holes 18 a and 18 b in the center of the cylinder block 10 and the front housing 13, and the drive shaft 20 is rotatable in the crank chamber 12.
[0023]
In the crank chamber 12, a lug plate 21 fixed to the drive shaft 20 and a drive swash plate connected to a sleeve 22 slidably fitted to the drive shaft 20 by a pin 23 are swingably connected. A journal 24 and a wobble plate 26 attached to a boss portion 25 of the journal 24 via a bearing are provided. The wobble plate 26 is slidably connected to a regulation plate 30 fixed in the crank chamber 12 to prevent rotation and allow the drive shaft 20 to swing in the axial direction. That is, when the drive shaft 20 rotates, the journal 24 rotates, and the wobble plate 26 swings non-rotatingly and in the axial direction as the journal 24 rotates and swings. The lug plate 21 and the journal 24 are connected by a kidney section 50.
[0024]
The kidney portion 50 includes an arc-shaped elongated hole 52 provided in a lug hinge 51 provided on one end side of the lug plate 21, and an insertion hole 54 provided in a swash plate hinge 53 provided on one end side of the journal 24. The journal pin 55 is inserted into the long hole 52 so as to be swingable, and both ends thereof are press-fitted and held in the insertion holes 54 and 54. In addition, a C ring 59 is fitted at the tip of the journal pin 55 to prevent the journal pin 55 from coming off. The kidney portion 50 regulates the maximum inclination angle and the minimum inclination angle of the wobble plate 26.
[0025]
The piston 19 accommodated in each cylinder 11 is connected to a wobble plate 26 via a piston rod 19a, and reciprocates as the wobble plate 26 swings.
[0026]
The variable displacement swash plate compressor 1 has an engine as its basic function. (Not shown) By the belt (Not shown) The drive shaft 20 is rotationally driven via the pulley 27 and the magnet clutch 28, and when the drive shaft 20 rotates, the journal 24 rotates together with the drive shaft 20 while being inclined with respect to the drive shaft 20, The wobble plate 26 slides in the axial direction of the drive shaft 20 while wobbling the outer peripheral edge. Further, when the outer peripheral edge of the wobble plate 26 reciprocates in the axial direction of the drive shaft 20, the piston 19 reciprocates via the piston rod 19 a, and the reciprocating motion of the piston 19 causes the valve plate to move from the suction chamber 15. The refrigerant sucked into the cylinder 11 through the 14 suction holes 15 a is compressed and discharged from the cylinder 11 into the discharge chamber 16 through the discharge holes of the valve plate 14.
[0027]
In order to make this discharge capacity variable, the extraction passage 15b that always connects the crank chamber 12 and the suction chamber 15, the supply passage 16a that connects the crank chamber 12 and the discharge chamber 16, and the supply passage 16a are opened and closed. A pressure control mechanism comprising a control valve 29 is provided. When the pressure in the crank chamber 12 is changed by opening and closing the control valve 29, the inclination angle of the wobble plate 26 changes due to the pressure balance between the crank chamber 12 and the suction chamber 15 before and after the piston 19, that is, the piston stroke is reduced. As a result, the discharge capacity of the capacity variable swash plate compressor 1 changes.
[0028]
FIG. 2 is a cross-sectional view of the kidney section 50 when the variable displacement swash plate compressor 1 of the first embodiment is viewed from the direction A in FIG. The kidney portion 50 of the present embodiment includes a long hole 52, 52 provided on the lug hinge 51 along a circumferential tangent of the rotation surface of the lug plate 21, and a circumferential tangent of the rotation surface of the lug plate 21. , And a journal pin 55 having a tapered shape that gradually narrows from the proximal end side toward the distal end side. The tip side (tapered side) of the journal pin 55 is positioned forward in the rotational direction of the lug plate 21. The insertion hole 54, the long hole 52, and the insertion hole 54 are inserted from the distal end side in this order, and the proximal end side and the distal end side are press-fitted and held in the insertion holes 54 and 54. In addition, a C ring 59 is fitted at the tip of the journal pin 55 to prevent the journal pin 55 from coming off. The long hole 52 is provided so that the inner peripheral wall 52 ′ of the hole is parallel to the circumferential tangent of the rotation surface of the lug plate 21.
[0029]
When the variable displacement swash plate compressor 1 of this embodiment is operated, the kidney portion 50 always comes to the top dead center of the piston 19. Further, since the compressed refrigerant starts to be discharged into the discharge chamber 16 before the top dead center, as shown in FIG. 6, the peak of the pressure in the cylinder comes before the top dead center. The timing at which the cylinder pressure reaches a peak differs between when operating at a low speed and when operating at a high speed, and there is a tendency to approach the top dead center as the speed increases. Further, when the refrigerant is compressed, a compression reaction force is applied to the journal 24 by the cylinder pressures of all the cylinders in the compression stroke.
[0030]
Therefore, in the low rotation range, as shown in FIG. 7, since the state where the pressure in the cylinder is high continues for a long time, the resultant force of the compression reaction force of each cylinder has a relatively small pulsation and is shown in FIGS. As described above, since it is applied to a place away from the kidney portion 50 of the journal 24, a stable force acts on the kidney portion 50 that supports the journal 24. As a result, in the low rotation range, the swash plate hinge 53 constantly urges the journal pin 55 to the lug hinge 51, so that there is little vibration and noise is relatively low.
[0031]
Also, in the high rotation range, as shown in FIG. 8, the high pressure in the cylinder is short and the peak pressure of the cylinder pressure is high in FIGS. 11 and 12, so the resultant force of the compression reaction force of each cylinder is pulsating. The resultant force of the compression reaction force is applied to a location close to the kidney portion 50 of the journal 24.
[0032]
Therefore, in the kidney portion 150 that has been generally used as shown in FIG. 13, the lug hinge 51 and the lug hinge 51 are arranged so that the elongated hole 152 and the insertion hole 154 are parallel to the rotation surface of the lug plate 21. Each of the swash plate hinges 53 is connected by a journal pin 155 having a columnar shape with a constant thickness, so that the kidney portion 150 rattles during operation, causing noise and vibration.
[0033]
However, in this embodiment, since the elongated hole 52 and the insertion hole 54 are connected by the journal pin 55 having the tapered portion 56, the resultant force of the compression reaction force is small during operation, and the journal 24 is moved to the lug plate 21. Even when the abutting and holding cannot be performed, the journal pin 55 is abutted and held on the inner peripheral wall 52 ′ of the elongated hole 52 by the rotational driving force of the lug plate 21, so that the journal 24 is against the rotating surface of the lug plate 21. Since it is held in an inclined state, rattling of the kidney section 50 is prevented, and generation of noise and vibration can be prevented.
[0034]
FIG. 14 shows a compressor in which a journal pin 155 having a cylindrical shape with a constant thickness, which has been generally used in the past, is used for the kidney section 150, and a journal pin having the tapered portion 56 of the present embodiment. The result of having measured the noise which generate | occur | produces when operating the compressor which used 55 for the kidney part 50 is shown is shown. Further, the taper portion 56 of the journal pin 55 is formed so that the inclination angle is 0.15 ° to 1.0 ° with respect to the central axis.
[0035]
From the low rotation range to the high rotation range of the variable displacement swash plate compressor 1, the journal pin 55 having the tapered portion 56 of the present embodiment is generally incorporated in the kidney portion so that the generation of sound and vibration is lower. In particular, a journal pin 55 having a taper portion 56 is incorporated in comparison with a conventional journal pin 155 having a cylindrical shape with a constant thickness in a middle to high rotation range. It can be confirmed that the sound and vibration generated are clearly small.
[0036]
This is because the conventional one incorporating a journal pin 155 having a cylindrical shape with a constant thickness has a connecting portion between the lug plate of the kidney portion and the journal provided in parallel to the rotation surface of the lug plate. Therefore, sound and vibration are generated when the journal rattles due to the pulsation of the compression reaction force. Due to the rotational driving force, the taper portion 56 of the journal pin is held in contact with the inner peripheral wall 52 ′ of the long hole, and the journal 24 is held in contact with the lug plate 21, so that the compression reaction force pulsates. However, the journal 24 does not rattle.
[0037]
Therefore, with the above configuration, in the capacity variable swash plate compressor in the operating state, the taper portion of the journal pin is held in contact with the inner peripheral wall of the long hole by the rotational driving force of the lug plate, thereby causing rattling of the kidney portion. It is possible to prevent the generation of sound and vibration.
[0038]
Journal pin with tapered taper Insert into the insertion hole and the long hole so that the tapered side is located in front of the rotation direction of the lug plate By doing so, an increase in manufacturing cost can be prevented without complicating the structure of the kidney part.
[0039]
As another aspect of the present embodiment, as shown in FIG. 3, as shown in FIG. 3, a distal end side holding portion 57 that is press-fitted and held in the insertion holes 54, 54 on the distal end side and the proximal end side of the tapered portion 56, A portion 58 is formed. As in the above embodiment, this mode is a capacity variable swash plate compressor in an operating state, and the taper portion of the journal pin is held in contact with the inner peripheral wall of the long hole by the rotational driving force of the lug plate. It is possible to prevent the occurrence of sound and vibration by preventing rattling of the part.
[0040]
As another aspect of the present embodiment, a journal pin having a stepped shape that narrows in a staircase shape from the proximal end side toward the distal end side can be considered. By providing a taper shape that linearly narrows like the journal pin 55 of the embodiment, since the journal pin does not hit the inner peripheral wall of the long hole locally, generation of wear powder can be prevented.
[0041]
Further, the variable displacement swash plate compressor 1 of the present embodiment is the one in which the kidney section 50 is applied to a wobble plate type compressor, but the same applies when the kidney section 50 is applied to a swash type compressor. An effect can be obtained.
[0042]
FIG. 4 is a cross-sectional view of the kidney portion 50b when the variable displacement swash plate compressor 1 of the second embodiment is viewed from the direction A in FIG. The kidney portion 50b of the present embodiment includes long holes 52b and 52b provided on the lug hinge 51 along the circumferential tangent line of the rotation surface of the lug plate 21, and the front side to the rear side in the rotation direction of the lug plate 21. The insertion hole 54b is provided so as to be inclined toward the lug plate 21 and the journal pin 55b having a columnar shape with a constant thickness. The front end side (tapered side) of the journal pin 55 is positioned forward in the rotational direction of the lug plate 21. The insertion hole 54b, the long hole 52b, and the insertion hole 54b are inserted in this order from the distal end side, and the proximal end side and the distal end side are press-fitted and held in the insertion holes 54b and 54b. Further, a C-ring 59 is fitted at the tip of the journal pin 55b to prevent the journal pin 55b from coming off from the insertion hole 54b. The long hole 52b is formed by temporarily inclining the lug plate 21 after the vertical hole is drilled by a drill blade in the manufacturing process, so that the inner peripheral wall 52b 'of the hole is the rotational surface of the lug plate 21. Are provided so as to be parallel to the circumferential tangent line. Further, as a forming method, the long holes may be formed in advance and then the holes may be processed vertically. Further, the drill blade itself may be temporarily tilted without tilting the manufactured product.
[0043]
Further, the kidney portion 50b of the present embodiment has a small resultant force of the compression reaction force during operation because the long hole 52b and the insertion hole 54b are connected by a journal pin 55b having a cylindrical shape with a constant thickness. Even when the journal 24 cannot be held in contact with the lug plate 21, the journal portion 55 b of the journal pin 55 b is held in contact with the inner peripheral wall 52 b ′ of the long hole 52 b by the rotational driving force of the lug plate 21. Since 24 is held in an inclined state with respect to the rotation surface of the lug plate 21, rattling of the kidney portion 50b is prevented.
[0044]
Therefore, with the above configuration, in the capacity variable swash plate compressor in the operating state, the taper portion of the journal pin is held in contact with the inner peripheral wall of the long hole by the rotational driving force of the lug plate, thereby causing rattling of the kidney portion. It is possible to prevent the generation of sound and vibration.
[0045]
In addition, the insertion hole is provided so as to be inclined toward the lug plate from the front side to the rear side in the rotation direction of the lug plate, thereby reducing the manufacturing cost without complicating the structure of the kidney portion. An increase can be prevented.
[0046]
Further, the variable displacement swash plate compressor 1 of the present embodiment is such that the kidney section 50b is applied to a wobble plate compressor, but the same applies to the case where the kidney section 50b is applied to a swash compressor. An effect can be obtained.
[0047]
FIG. 5 is a cross-sectional view of the kidney portion 50c when the variable displacement swash plate compressor 1 of the third embodiment is viewed from the direction A in FIG. The kidney portion 50 c of the present embodiment includes elongated holes 52 c and 52 c that are inclined in a direction away from the lug plate 21 from the front side to the rear side in the rotation direction of the lug plate 21, and the rotation surface of the lug plate 21. The insertion holes 54c and 54c are provided on the swash plate hinge 53c along the circumferential tangent line, and the cylinder has a constant thickness. The front end side (tapered side) of the journal pin 55 is positioned forward in the rotational direction of the lug plate 21. The insertion hole 54c, the long hole 52c, and the insertion hole 54c are inserted in this order from the distal end side, and the proximal end side and the distal end side are press-fitted and held in the insertion holes 54c and 54c. Further, a C-ring 59 is fitted at the tip of the journal pin 55c to prevent the journal pin 55c from coming off from the insertion hole 54c. Since the insertion hole 54c is formed at a position where the central axis of the journal pin 55c and the central axis of the insertion hole 54c are eccentric, the inner peripheral wall of the hole is parallel to the circumferential tangent to the rotation surface of the lug plate 21. It is provided to become.
[0048]
Further, the kidney portion 50c of the present embodiment has a small resultant force of the compression reaction force during operation because the elongated hole 52c and the insertion hole 54c are connected by a journal pin 55c having a cylindrical shape with a constant thickness. Even when the journal 24 cannot be held in contact with the lug plate 21, the journal portion 55 c of the journal pin 55 c is held in contact with the inner peripheral wall 52 c ′ of the long hole 52 c by the rotational driving force of the lug plate 21. Since 24 is held in an inclined state with respect to the rotational surface of the lug plate 21, rattling of the kidney portion 50c is prevented.
[0049]
Therefore, with the above configuration, in the variable capacity swash plate compressor in the operating state, the journal pin is held in contact with the inner peripheral wall of the long hole by the rotational driving force of the lug plate, thereby preventing rattling of the kidney portion. , Can prevent the generation of sound and vibration.
[0050]
In addition, since the long holes are provided so as to be inclined in the direction away from the lug plate from the front side to the rear side in the rotation direction of the lug plate, the manufacturing cost can be reduced without complicating the structure of the kidney portion. An increase can be prevented.
[0051]
Further, the variable displacement swash plate compressor 1 of the present embodiment is one in which the kidney section 50 is applied to a wobble plate type compressor, but the same applies to the case where the kidney section 50 is applied to a swash type compressor. An effect can be obtained.
[Brief description of the drawings]
FIG. 1 is an overall cross-sectional view of a variable displacement swash plate compressor according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part showing a kidney part of the first embodiment.
FIG. 3 is a cross-sectional view of a main part showing a kidney portion of another aspect of the first embodiment.
FIG. 4 is a cross-sectional view of a main part showing a kidney part of a second embodiment.
FIG. 5 is a cross-sectional view of a main part showing a kidney part of a third embodiment.
FIG. 6 is a diagram showing how the pressure inside each cylinder changes due to the rotation of the journal.
FIG. 7 is a diagram showing a compression reaction force of each cylinder acting on a journal in a low rotation state.
FIG. 8 is a diagram showing a compression reaction force of each cylinder acting on a journal in a high rotation state.
FIG. 9 is a diagram showing a compression reaction force of each cylinder that acts on a journal when a cylinder pressure reaches a peak in a low rotation state.
FIG. 10 is a diagram showing a compression reaction force of each cylinder acting on a journal when a piston reaches top dead center in a low rotation state.
FIG. 11 is a diagram showing the compression reaction force of each cylinder acting on the journal when the cylinder pressure reaches a peak in a high rotation state.
FIG. 12 is a diagram showing the compression reaction force of each cylinder acting on the journal when the piston reaches top dead center in a high rotation state.
FIG. 13 is a cross-sectional view of an essential part showing a kidney part that has been generally used conventionally.
FIG. 14 is a graph showing a sound pressure measurement result when the variable displacement swash plate compressor of the first embodiment is in operation.
[Explanation of symbols]
1 ... Variable displacement swash plate compressor
12 ... Crank chamber
20 ... Drive shaft
21 ... Rug plate
24 ... Drive swash plate
50, 50b, 50c ... Kidney section
51 ... Lug hinge
52, 52b, 52c ... long hole
52 ', 52b', 52c '... inner peripheral wall
53 ... Swash plate hinge
54 ... Insertion hole
54b ... insertion hole
55, 55b, 55c ... Journal pin
56 ... Taper part
56b, 56c ... cylindrical portion

Claims (4)

A drive shaft (20) rotatably fitted in the crank chamber (12);
A lug plate (21) fixed to the drive shaft (20) and rotating together with the drive shaft (20);
The drive shaft (20) is slidably supported by the drive shaft (20) while passing through the central portion of the disk shape, and has an inclination angle with respect to the drive shaft (20). A drive swash plate (24) that can be freely changed;
A long hole provided in one of the lug hinge (51) provided on one end side of the lug plate (21) and the swash plate hinge (53) provided on one end side of the drive swash plate (24) ( 52),
An insertion hole (54) provided in the other of the lug hinge (51) and the swash plate hinge (53);
The long hole (52) and a substantially cylindrical journal pin (55) supported by the insertion hole (54) are connected to the lug plate (21) and the drive swash plate (24). In a variable displacement swash plate compressor having a kidney section (50),
With the variable displacement swash plate compressor (1) in operation, the journal pin (55) is held in contact with the inner peripheral wall (52 ') of the long hole (52) by the rotational driving force of the lug plate (21). Thus, the variable displacement swash plate compressor is characterized in that the drive swash plate (24) is held in an inclined state with respect to the rotation surface of the lug plate (21) . A variable displacement swash plate compressor according to claim 1,
The kidney part (50) has a tapered shape tapered at the insertion hole (54) and the elongated hole (52) provided along a circumferential tangent to the rotation surface of the lug plate (21). The journal pin (55) is inserted into the insertion hole (54) and the elongated hole (52) so that the taper side of the lug plate (21) is positioned forward in the rotational direction, and the variable displacement swash plate compressor ( When 1) is in the operating state, the taper portion (56) of the journal pin (55) is held in contact with the inner peripheral wall (52 ') of the long hole (52) by the compression reaction force. Plate type compressor. A variable displacement swash plate compressor according to claim 1,
The kidney portion (50b) is substantially formed in the insertion hole (54b) provided to be inclined in a direction approaching the lug plate (21) from the front side to the rear side in the rotation direction of the lug plate (21). When a journal pin (55b) having a cylindrical shape is inserted and the variable displacement swash plate compressor (1) is in operation, the journal pin is inserted into the inner peripheral wall (52b ') of the long hole (52b) by a compression reaction force. The capacity-variable swash plate compressor in which the cylindrical portion (56b) of (55b) is held in contact. A variable displacement swash plate compressor according to claim 1,
The kidney portion (50c) is substantially formed in the elongated hole (52c) provided to be inclined in a direction away from the lug plate (21) from the front side to the rear side in the rotation direction of the lug plate (21). When a journal pin (55c) having a cylindrical shape is inserted and the variable displacement swash plate compressor (1) is in operation, the journal pin is inserted into the inner peripheral wall (52c ') of the long hole (52c) by a compression reaction force. The capacity variable swash plate compressor, wherein the cylindrical portion (56c) of (55c) is held in contact.

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