CN101297115A

CN101297115A - Variable displacement compressor

Info

Publication number: CN101297115A
Application number: CNA2006800400332A
Authority: CN
Inventors: 宫地俊胜; 广濑隆一; 石川直树; 久保敏
Original assignee: Calsonic Kansei Corp
Current assignee: Marelli Corp
Priority date: 2005-10-27
Filing date: 2006-10-20
Publication date: 2008-10-29
Also published as: EP1942275A4; JP4794274B2; KR20080066928A; JP2007120394A; US20090246050A1; EP1942275A1; WO2007049523A1

Abstract

A variable displacement compressor comprising a rotating member (21) secured to and rotating integrally with a drive shaft (10), a sleeve (22) fitted to the drive shaft (10) slidably in the axial direction, a tilting member (24) rotatably fitted to a sleeve (22) through pivot pins (61), a link mechanism (40) connecting the rotating member (21) to the tilting member (24) and transmitting the rotating torque of the rotating member (21) to the tilting member (24) while allowing inclination of the tilting member (24), and tilting guide faces (22c, 25d) formed on the sleeve (22) and the tilting member (24) as a surface perpendicular to the pivot pins (61) and brought into slidable contact with each other.

Description

Variable displacement compressor

Technical field

The present invention relates to variable displacement compressor.

Background technique

A kind of variable displacement compressor in the past has live axle, rotor, sleeve, swash plate, link mechanism and piston, and above-mentioned rotor is fixed on the live axle and rotates integratedly with this live axle; Above-mentioned sleeve is installed on the live axle and can be free to slide vertically with respect to this live axle; Above-mentioned swash plate is installed on the sleeve and can freely fascinates with respect to this sleeve; Above-mentioned link mechanism is located between rotor and the swash plate and is used for the rotation of rotor is delivered to swash plate; Above-mentioned piston move back and forth along with the rotation of swash plate (for example with reference to TOHKEMY 2003-172417 communique, Japanese kokai publication hei 10-176658 communique).Link mechanism connects rotor and swash plate, the rotation of rotor can be delivered to the tilt angle of swash plate and change swash plate.If change the tilt angle of swash plate, then piston stroke changes.

Fig. 9 is equivalent to the link mechanism in the Japanese kokai publication hei 10-176658 communique.

The link mechanism of Fig. 9 has 145,146, swash plate arms 147 of a pair of pivoted arm and a pair of linkage arm 142A, the 142B that faces mutually, the above-mentioned a pair of pivoted arm of facing mutually 145,146 141 settings highlightedly from rotor 140 towards swash plate, an above-mentioned swash plate arm 147 is 140 settings highlightedly from swash plate 141 towards rotor.These 5 arms 145,142A, 147,143B, 146 stacked along the direction of transfer of torque thus, are delivered to swash plate with the rotation of rotor 140.In addition, their end of a pair of linkage arm 142A, 142B is connected on a pair of pivoted arm 145,146 with the 1st connecting pin 143 and can rotates freely with respect to this a pair of pivoted arm 145,146, and their the other end is connected on the swash plate arm 147 with the 2nd connecting pin 144 and can rotates freely with respect to this swash plate arm 147.Thus, linkage arm 142A, 142B are that the center rotates with respect to pivoted arm 145,146 with connecting pin 143, and swash plate arm 147 is that the center rotates with respect to linkage arm 142A, 142B with connecting pin 144.Thus, can change the tilt angle of swash plate 141 with respect to live axle (not shown).

When compressor action (during the live axle rotation), pivoted arm 145 becomes the transmission of torque face and becomes the rotational slide surface of contact with the surface of contact of linkage arm 142A and the surface of contact of linkage arm 142A and swash plate arm 147.That is, on one side the surface of contact of pivoted arm 145 and linkage arm 142A be subjected to by the big caused surface pressure of torque Ft, Yi Bian be center sliding contact relatively with connecting pin 143.In addition, on one side the surface of contact of linkage arm 142A and swash plate arm 147 be subjected to by the big caused surface pressure of torque Ft, Yi Bian be the center rotation of relatively sliding with connecting pin 144.Therefore, when changing the tilt angle of swash plate 141, the slip resistance between the bearing surface of pivoted arm 145 and linkage arm 142A is very big, and the slip resistance between the bearing surface of linkage arm 142A and swash plate arm 147 is also very big.

In addition, when compressor action (during the live axle rotation), swash plate 141 is subjected to the anti-compressive force Fp from the piston that is connected with this swash plate 141.This anti-compressive force Fp is offset (with reference to Fig. 2) towards sense of rotation the place ahead of link mechanism as shown in Figure 9 according to rotating speed.At this moment, swash plate arm 147 is subjected to the torsional load effect along Y direction among the figure, locates to nip and produces jam at 2 points (C, C) between swash plate 141 and the linkage arm 142, has further increased slip resistance.

In order to solve such problem, in patent documentation 1, be folded with pad between the bearing surface of pivoted arm and linkage arm and between the bearing surface of linkage arm and swash plate arm, even but adopt such structure also still can produce same problem.

Summary of the invention

The problem that the present invention is conceived to above-mentioned conventional art makes, and its purpose is, a kind of variable displacement compressor that acts on the torsional load on the link mechanism that reduces is provided.

A technological scheme of the present invention is a variable displacement compressor, and it has rotating member, sleeve, the member that fascinates, link mechanism, piston and the guide surface that fascinates, and above-mentioned rotating member is fixed on the live axle and rotates integratedly with this live axle; Above-mentioned sleeve is installed on the above-mentioned live axle and can be with respect to this live axle towards axially being free to slide; The above-mentioned member that fascinates is installed on the above-mentioned sleeve with trunnion and can rotates freely with respect to this sleeve; Above-mentioned link mechanism connects above-mentioned rotating member and the above-mentioned member that fascinates, allow that the above-mentioned member that fascinates fascinates and with the transmission of torque of above-mentioned rotating member to the above-mentioned member that fascinates; Above-mentioned piston fascinates rotatablely moving of member and moves back and forth along with above-mentioned; Above-mentioned fascinate guide surface with above-mentioned trunnion mutually the form of the face of quadrature be formed at respectively on above-mentioned sleeve and the above-mentioned member that fascinates, and these guide surfaces that fascinate are in slidable contact with each other.

Description of drawings

Fig. 1 is the sectional view of the variable displacement compressor of one embodiment of the present invention.

Fig. 2 is the stereogram that swash plate and rotor set is installed to the assembly that forms on the live axle.

Fig. 3 is the exploded perspective view of the assembly of Fig. 2.

Fig. 4 is the sectional view of the assembly of Fig. 2.

Fig. 5 (a) is along the Va-Va line side cross sectional view among Fig. 4, and Fig. 5 (b) is along the Vb-Vb line side cross sectional view among Fig. 4.

Fig. 6 is the stereogram that comprises biopsy cavity marker devices of the state after being assembled into sleeve on the hub of swash plate.

Fig. 7 is the figure of the state after expression is assembled into sleeve on the hub of swash plate, and Fig. 7 (a) is a plan view, and Fig. 7 (b) is a side view, and Fig. 7 (c) is along the VIIc-VIIc line side cross sectional view among Fig. 7 (b).

Fig. 8 is along the VIII-VIII line side cross sectional view among Fig. 7 (c), and Fig. 8 (a) is the figure that makes the hub of the swash plate state parallel with respect to sleeve, the figure of Fig. 8 (b) state that to be the hub that makes swash plate tilt with respect to sleeve.

Fig. 9 is the sectional view of an example of representing the link mechanism of variable displacement compressor in the past.

Embodiment

Below, with reference to the variable displacement compressor of description of drawings one embodiment of the present invention.

Fig. 1 is the sectional view of variable displacement compressor.

As shown in Figure 1, the variable displacement compressor 1 of present embodiment is the oblique disk type changable volume compressor.This variable displacement compressor 1 has cylinder block 2, protecgulum 4 and bonnet 6, and above-mentioned cylinder block 2 has a plurality of cylinder thoraxes 3 (with reference to Fig. 2) uniformly-spaced to dispose in a circumferential direction; Above-mentioned protecgulum 4 engages with the front-end face of above-mentioned cylinder block 2 and is formed with crankshaft room 5 in inside; Above-mentioned bonnet 6 engages with the ear end face of cylinder block 2 and is formed with suction chamber 7 in inside and discharges chamber 8 across valve plate 9.These cylinder block 2, protecgulum 4 and bonnet 6 are connected and fixed by a plurality of screws 13 that run through, and have constituted the housing of compressor.

Be formed with inlet hole 11 and tap hole 12 on valve plate 9, above-mentioned inlet hole 11 is communicated with cylinder thorax 3 and suction chamber 7; Above-mentioned tap hole 12 is communicated with cylinder thorax 3 and discharges chamber 8.

On the surface of cylinder block 2 sides of valve plate 9, be provided with the not shown suction valve mechanism that is used to open and close inlet hole 11.On the surface of bonnet 6 sides of valve plate 9, be provided with the not shown expulsion valve mechanism that is used to open and close tap hole 12.Between valve plate 9 and bonnet 6, be folded with not shown gasket seal, to keep suction chamber 7 and the sealing of discharging chamber 8.

The center of cylinder block 2 and protecgulum 4 as the

central openings

14,18 of bearing hole in by radial bearing 15,19 rotatably mounted live axle 10, thus, live axle 10 can be rotated freely in crankshaft room 5.In addition, between the internal face of front-end face that is fixed in the rotor 21 (aftermentioned) on the live axle 10 and bonnet 6, be folded with thrust-bearing 20, between ear end face central openings 14 rear end side that are fixed in cylinder block 2,, be folded with thrust-bearing 16 as the adjustment screw 17 of fixed component and live axle 10.

Crankshaft room 5 contains rotor 21 as rotating member, sleeve 22 and as the swash plate 24 of the member that fascinates, above-mentioned rotor 21 is located on the above-mentioned live axle 10 regularly; Above-mentioned sleeve 22 is installed on the live axle 10 and can be with respect to this live axle 10 towards axially being free to slide; Above-mentioned swash plate 24 usefulness trunnions 61 are connected on the sleeve 22 and can move with respect to sleeve 22 pivots.That is, swash plate 24 is installed on the live axle 10 by sleeve 22 and trunnion 61, and swash plate 24 can freely be fascinated and can axially being free to slide along live axle 10 with respect to live axle 10.In this embodiment, swash plate 24 has hub 25 and swash plate main body 26, and above-mentioned hub 25 is installed on the sleeve 22 and can fascinates with respect to this sleeve 22; Above-mentioned swash plate main body 26 is fixed on the bump 25a of this hub 25.

Piston 29 is contained in each cylinder thorax 3 and can be free to slide in each cylinder thorax 3, and this piston 29 is connected with swash plate 24 by hemispheric pair of

pistons watts

30,30.

Between as the rotor 21 of rotating member and swash plate 24, be folded with link mechanism 40 as the member that fascinates.Utilize the tilt angle of this link mechanism 40 tolerables change swash plate 24 and the transmission of torque of rotor 21 can be arrived swash plate 24.

Tilt angle for swash plate 24, if it is closely mobile towards cylinder block 2 side joints that sleeve 22 overcomes the active force of Returnning spring 52, then the tilt angle of swash plate 24 reduces, on the other hand, move towards the direction away from cylinder block 2 if sleeve 22 overcomes the active force of Returnning spring 51, then the tilt angle of swash plate 24 increases.In addition, the reference character 53 among Fig. 1 for Returnning spring with stop member (for example C shape seal ring etc.), this Returnning spring is with compressing hold reset spring 52 in the annular slot of stop member fastening on being formed at live axle 10 and between itself and the sleeve 22.

When live axle 10 rotations, rotor 21 rotates integratedly with live axle 10, and the rotation of this rotor 21 is delivered to swash plate 24 by link mechanism 40.The rotation of swash plate 24 is converted into the to-and-fro motion of piston 29, and piston 29 moves back and forth in cylinder thorax 3.When this piston 29 moved back and forth, the refrigeration agent in the suction chamber 7 was inhaled in the cylinder thorax 3 by the inlet hole 11 of valve plate 9, was compressed in cylinder thorax 3 then, and the refrigeration agent after the compression is arranged to discharging chamber 8 by the tap hole 12 of valve plate 9.

In this variable displacement compressor, be provided with pressure control mechanism.Pressure difference (pressure balance) between the pressure P c of crankshaft room of the back side of pressure control mechanism by adjusting piston 29 and the suction chamber pressure P s of the front face side of piston 29 changes the tilt angle of swash plate 24, thus the change piston stroke.If piston stroke changes, then the discharge capacity of the refrigeration agent of compressor changes.

Specifically, pressure control mechanism has the path of bleeding (not shown), air feed path (not shown) and control valve 33, and the above-mentioned path of bleeding is communicated with crankshaft room 5 and suction chamber 7; Above-mentioned air feed path is communicated with crankshaft room 5 and discharges chamber 8; Above-mentioned control valve 33 is located at this air feed path midway, the switching of control air feed path.

Because no matter control valve 33 is opened or closed, the path of bleeding is all opened, and therefore, the refrigerant gas in the crankshaft room 5 is arranged to suction chamber 7 by the path of bleeding often.

If open the air feed path with control valve 33, then higher pressure refrigerant gas flow into the crankshaft room 5 from discharging chamber 8 by the air feed path, and thus, the pressure in the crankshaft room 5 rises.If the pressure in the crankshaft room 5 rise, then sleeve 22 closely moves and the tilt angle of swash plate 24 reduces towards cylinder block 2 side joints, and thus, piston stroke diminishes, and discharge capacity reduces.

On the other hand, if close the air feed path with control valve 33, then the refrigerant gas in the crankshaft room 5 is arranged to suction chamber 7 by the path of bleeding often, and therefore, the pressure difference between suction chamber 7 and the crankshaft room 5 diminishes gradually.So sleeve 22 moves and the tilt angle of swash plate 24 increases towards the direction away from cylinder block 2, it is big that piston stroke becomes, and discharge capacity increases.

Then, illustrate in greater detail the supporting structure of swash plate with reference to Fig. 2～Fig. 8.

Fig. 2 is the stereogram that swash plate and rotor set is loaded on the assembly that forms on the live axle, Fig. 3 is the exploded perspective view of the assembly of Fig. 2, Fig. 4 is the sectional view of the assembly of Fig. 2, Fig. 5 (a) is along the Va-Va line side cross sectional view among Fig. 4, Fig. 5 (b) is along the Vb-Vb line side cross sectional view among Fig. 4, Fig. 6 is the stereogram that comprises biopsy cavity marker devices of the state after being assembled into sleeve on the hub of swash plate, Fig. 7 is the figure of the state after expression is assembled into sleeve on the hub of swash plate, Fig. 7 (a) is a plan view, Fig. 7 (b) is a side view, Fig. 7 (c) is along the VIIc-VIIc line side cross sectional view among Fig. 7 (b), Fig. 8 is along the VIII-VIII line side cross sectional view among Fig. 7 (c), Fig. 8 (a) is the figure that makes the hub of the swash plate state parallel with respect to sleeve, the figure of Fig. 8 (b) state that to be the hub that makes swash plate tilt with respect to sleeve.

At first link mechanism 40 is described.

Shown in Fig. 3, Fig. 4, Fig. 5 (a), link mechanism 40 has a pair of arm of facing mutually 41,41, a pair of

arm

43,43 and rectangular-shaped component-bar linkage 45, and the above-mentioned a pair of arm of facing mutually 41,41 24 is provided with highlightedly and is cut apart by slit 41s from rotor 21 towards swash plate; Above-mentioned a pair of

arm

43,43 21 is provided with highlightedly and is cut apart by slit 43s from swash plate 24 towards rotor; Above-mentioned component-bar linkage 45 is inserted among the slit 43s (between a pair of arm 43,43) of the slit 41s (between a pair of arm 41,41) of rotor 21 and swash plate 24.In addition, arbitrary to

arm

41,41 and

arm

43,43 all be towards with live axle 10 direction of quadrature (tangent direction of=sense of rotation) configuration over the ground of practising physiognomy mutually.

The width d 1 of the slit 41s of rotor 21 (being the width between inner side surface 41d, the 41d of a pair of

arm

41,41 of rotor 21), and the width d2 of the slit 43s of swash plate 24 (being the width between inner side surface 43d, the 43d of a pair of

arm

43,43 of swash plate 24) form same width, and the width d0 of component-bar linkage 45 (being the width between two outer side surface 45e, the 45e of component-bar linkage 45) also forms with the width roughly the same with respect to this width d1, d2, thus, component-bar linkage 45 can be entrenched in two slit 41s, the 43s with being free to slide, always with they sliding contacts.

One end 45a of component-bar linkage 45 is connected on a pair of

arm

41,41 of rotor 21 and can rotates freely with respect to this a pair of

arm

41,41 with the 1st connecting pin 46.The other end 45b of component-bar linkage 45 is connected on a pair of

arm

43,43 of swash plate 24 and can rotates freely with respect to this a pair of

arm

43,43 with the 2nd connecting pin 47.Arbitrary connecting

46,47 all be towards with live axle 10 mutually the direction of quadrature (tangent direction of=sense of rotation) set.

In this example, but on a pair of

arm

41,41 of rotor 21, be provided with the bearing hole 41a of free rotary ground supporting the 1st connecting pin 46, end 45a at component-bar linkage 45 is provided with fixed hole 45c, by the 1st connecting pin 46 being pressed among this fixed hole 45c and the 1st connecting pin 46 is fixed.In addition, but on a pair of

arm

43,43 of swash plate 24, be provided with the bearing hole 43a of free rotary ground supporting the 2nd connecting

47,45b is provided with fixed hole 45d in the other end of component-bar linkage 45, by the 2nd connecting pin 47 being pressed among this fixed hole 45d and the 2nd connecting pin 47 is fixed.It is identical and length is identical that the 1st connecting pin 46 and the 2nd connecting pin 47 are set to diameter.

Then, with reference to Fig. 3～Fig. 7 the pivot actuation mechanism of coupling sleeve 22 with hub 25 described.

With along with live axle 10 mutually the trunnion 61 that extends of the direction of quadrature hub 25 rotatably is connected on the sleeve 22, hub 25 by with trunnion 61 the

fascinating guide surface

22c, 25e guiding of quadrature and be that the center rotates mutually with the axle.

Sleeve 22 forms general cylindrical shape, is installed on the live axle 10 and can be free to slide vertically with respect to this live axle 10.On sleeve 22, fixed

hole

22b, 22b clip the both sides that live axle 10 is formed at sleeve 22 coaxially.Fixed

hole

22b, 22b edge and the live axle 10 direction extension of quadrature mutually, trunnion 61 is fixed among this fixed hole 22b, the 22b.

On the other hand, bearing hole 25d, the 25d of the hub 25 of swash plate clip the both sides that live axle 10 is formed at the hub 25 of swash plate coaxially.This

bearing hole

25d, 25d are along extending with the direction of live axle 10 quadratures.Under the state in the middle pit of the stomach 25c that sleeve 22 is installed to hub 25, trunnion 61 is inserted among bearing hole 25d, the 25d of hub 25, thus, shown in Fig. 8 (a) and Fig. 8 (b), hub 25 is center and fascinating with respect to sleeve 22 with trunnion 61.And, as Fig. 5～as shown in Figure 7, on sleeve 22 and hub 25, be provided with fascinate guide surface 22c, the 25e that is in slidable contact with each other.This

fascinate guide surface

22c, 25e as with trunnion 61 face of quadrature mutually, and clip the both sides that sleeve 22, swash plate 25 are located in live axle 10 ground.Therefore,

fascinated guide surface

22c, 25e guiding and be to fascinate with respect to sleeve 22 in the center of hub 25 with trunnion 61.

Effect

The effect of the compressor of present embodiment then, is described.

When live axle 10 rotations, rotor 21 rotates integratedly with live axle 10.The rotation of this rotor 21 is passed to swash plate 24 by link mechanism 40.The rotation of swash plate 24 is converted into the to-and-fro motion of piston 29 by pair of

pistons watts

30,30, and piston 29 moves back and forth in cylinder thorax 3.After the to-and-fro motion that utilizes this piston 29 is drawn into the inlet hole 11 of the refrigeration agent in the suction chamber 7 by valve plate 9 in the cylinder thorax 3, this refrigerant gas is compressed in cylinder thorax 3, tap hole 12 rows of the refrigeration agent after the compression by valve plate 9 are to discharging chamber 8.

Want to change the discharge capacity of refrigeration agent, can adjust the pressure balance of piston front and back, change piston stroke by the pressure in the open and close control valve 33 adjustment crankshaft room 5.

More particularly, when opening the air feed path with control valve 33, higher pressure refrigerant gas flow into the crankshaft room 5 from discharging chamber 8 by the air feed path, and the pressure in the crankshaft room 5 is risen.After the pressure in the crankshaft room 5 rose, sleeve 22 closely moved and the tilt angle of swash plate 24 reduces towards cylinder block 2 side joints, and thus, piston stroke diminishes, and discharge capacity reduces.On the other hand, when closing the air feed path with control valve 33, the refrigerant gas in the crankshaft room 5 is arranged to suction chamber 7 by the path of bleeding often, and therefore, the pressure difference between suction chamber 7 and the crankshaft room 5 fades away and pressure equalization.So sleeve 22 moves and the tilt angle of swash plate 24 increases towards the direction away from cylinder block 2, it is big that piston stroke becomes, and discharge capacity increases.

At this, when compressor operation, can act on the swash plate 24 from the anti-compressive force Fp of piston 29.As shown in Figure 2, this anti-compressive force Fp is offset towards sense of rotation the place ahead from the top dead center TDC (position with link mechanism 40) of swash plate 24 sometimes according to the rotating speed of live axle 10.This is because in the compression stroke of piston 29, anti-compressive force maximum before the top dead center that arrives the compression stroke terminal point.Under these circumstances, on swash plate 24, anti-compressive force Fp is partial to sense of rotation the place ahead from top dead center TDC, makes swash plate 24 be subjected to twisting the load effect.

In the present embodiment, this distortion load is born with

fascinate guide surface

22c, 25e by link mechanism 40.Therefore, alleviated the part that acts on transmitting torque and rotational slide, be the distortion load on the link mechanism 40.Thus, reduced slip resistance in the link mechanism 40.That is, reduced slip resistance between component-bar linkage 45 and the arm 41,43.More particularly, reduced slip resistance between the inner side surface 43d of the outer side surface 45e of slip resistance between the inner side surface 41d of the outer side surface 45e of component-bar linkage and arm 41 and component-bar linkage and arm 43 exactly.Thus, improved the controlled of compressor.

And as shown in Figure 5, in the compressor 1 of present embodiment, the width d4 of a pair of fascinate guide surface 22c, the 22c of sleeve 22 is configured to the width d0 greater than the other end 45b of the width d0 of an end 45a of component-bar linkage 45 and component-bar linkage 45.Therefore, compare, can bear more distortion load, further improved the controlled of compressor by

fascinate guide surface

22c, 22c with link mechanism 40.

Below, enumerate the feature of present embodiment.

(1) present embodiment is a variable displacement compressor, and it has rotating member 21, sleeve 22, fascinate member 24 and link mechanism 40, and above-mentioned rotating member 21 is fixed on the live axle 10 and rotates integratedly with this live axle 10; Above-mentioned sleeve 22 is installed on the live axle 10 and can be with respect to this live axle 10 towards axially being free to slide; These member 24 usefulness trunnions 61 that fascinate are installed on the sleeve 22 and can rotate freely with respect to this sleeve 22; Above-mentioned link mechanism 40 connects rotating members 21 and fascinates members 24, allow that the member 24 that fascinates fascinates and with the transmission of torque of rotating member 21 to the member 24 that fascinates; On the sleeve 22 and the member 24 that fascinates, be provided with

fascinate guide surface

22c, 25d, these

fascinate guide surface

22c, 25e as with trunnion 61 face of quadrature mutually, and be in slidable contact with each other.Therefore, when the member 24 that fascinates was subjected to anti-compressive force, the distortion load was born with link mechanism 40 both sides by sleeve 22.Therefore, the distortion that has reduced to act on the link mechanism 40 (transmitting torque and rotatable sliding parts) is loaded.Thus, make the variation at tilt angle of the member 24 that fascinates smooth and easy, improved the controlled of compressor.In addition, improved the durability of link mechanism 40, but also can seek miniaturization.

(2) in addition, according to present embodiment, link mechanism 40 has arm 41 and arm 43, and above-mentioned arm 41 is provided with towards the member 24 that fascinates highlightedly from rotating member 21; Above-mentioned arm 43 is provided with highlightedly and can be connected with the arm 41 of rotating member by connecting pin (the 1st connecting pin 46 this example and the 2nd connecting pin 47) directly or indirectly with rotating freely towards rotating member 21 from the member 24 that fascinates.Therefore, when fascinated in the tilt angle of member 24 in change, each member is the center rotation with the trunnion 61 of sleeve 22 and the connecting pin of link mechanism 40 (connecting

46,47 in this example), therefore, the friction mode is " a rolling-sliding friction ", therefore, friction ractor is minimum, has further improved the controlled of compressor.

(3) in addition, according to the present invention, link mechanism 40 has a pair of arm of facing mutually 41,41, a pair of arm of facing mutually 43,43, component-bar linkage the 45, the 1st connecting pin 46 and the 2nd connecting pin 47, and the above-mentioned a pair of arm of facing mutually 41,41 is provided with towards the member 24 that fascinates highlightedly from rotating member 21; The above-mentioned a pair of arm of facing mutually 43,43 is provided with towards rotating member 21 highlightedly from the member 24 that fascinates; An above-mentioned end 45a who connects component-bar linkage 45 can be entrenched between a pair of

arm

41,41 of rotating member with being free to slide, and its other end 45b can be entrenched between a pair of

arm

43,43 of the member that fascinates with being free to slide; Above-mentioned the 1st connecting pin 46 can couple together an end 45a of component-bar linkage and the

arm

41,41 of rotating member with rotating freely, and above-mentioned the 2nd connecting pin 47 can couple together the other end 45b of component-bar linkage and the

arm

43,43 of the member that fascinates with rotating freely.Therefore, when fascinated in the tilt angle of member 24 in change, each member is the center rotation with the trunnion 61 of sleeve 22 and the connecting

46,47 of link mechanism 40, therefore, the friction mode is " a rolling-sliding friction ", therefore, friction ractor is minimum, has further improved the controlled of compressor.

(4) in addition, according to present embodiment,

fascinate guide surface

22c, 25e is a pair of and clips live axle 10 and establish, and the width d4 of a pair of fascinate guide surface 22c, the 22c of sleeve 22 is greater than the width d0 (with reference to Fig. 5) of the other end 45b of the width d0 of an end 45a of component-bar linkage and component-bar linkage.Therefore, can bear bigger distortion load by fascinate guide surface 22c, the 22c of sleeve 22, thereby can further reduce the burden that acts on the link mechanism 40.Thus, can further improve the controlled of compressor.

Utilizability on the industry

In addition, the present invention can not only be defined in above-mentioned mode of execution and explain, can carry out various changes in technological thought scope of the present invention.

Claims

1. variable displacement compressor, wherein, this variable displacement compressor has:

Rotating member, it is fixed on the live axle and rotates integratedly with this live axle;

Sleeve, it is installed on the above-mentioned live axle and can be free to slide vertically with respect to this live axle;

The member that fascinates, it is installed on the above-mentioned sleeve with trunnion and can rotates freely with respect to this sleeve;

Link mechanism, it connects above-mentioned rotating member and the above-mentioned member that fascinates, allow that the above-mentioned member that fascinates fascinates and with the transmission of torque of above-mentioned rotating member to the above-mentioned member that fascinates;

Piston, it fascinates rotatablely moving of member and moves back and forth along with above-mentioned;

The guide surface that fascinates, its with above-mentioned trunnion mutually the form of the face of quadrature be formed at respectively on above-mentioned sleeve and the above-mentioned member that fascinates, and these guide surfaces that fascinate are in slidable contact with each other.

2. variable displacement compressor according to claim 1, wherein, above-mentioned link mechanism has:

The arm of above-mentioned rotating member, it is provided with towards the above-mentioned member that fascinates highlightedly from above-mentioned rotating member;

The arm of the above-mentioned member that fascinates, it is provided with towards above-mentioned rotating member highlightedly from the above-mentioned member that fascinates;

Connecting pin, it can couple together the arm of above-mentioned rotating member and the arm of the above-mentioned member that fascinates directly or indirectly with rotating freely.

3. variable displacement compressor according to claim 1 is characterized in that,

Above-mentioned link mechanism has:

The a pair of arm of facing mutually of above-mentioned rotating member, they are provided with towards the above-mentioned member that fascinates highlightedly from above-mentioned rotating member;

The a pair of arm of facing mutually of the above-mentioned member that fascinates, they are provided with towards above-mentioned rotating member highlightedly from the above-mentioned member that fascinates;

Component-bar linkage, the one end can be entrenched between a pair of arm of above-mentioned rotating member with being free to slide, and its other end can be entrenched between a pair of arm of the above-mentioned member that fascinates with being free to slide;

The 1st connecting pin, it can couple together an end of above-mentioned component-bar linkage and the arm of above-mentioned rotating member with rotating freely;

The 2nd connecting pin, it can couple together the other end of above-mentioned component-bar linkage and the arm of the above-mentioned member that fascinates with rotating freely.

4. variable displacement compressor according to claim 3, wherein,

The above-mentioned guide surface that fascinates of above-mentioned the fascinate guide surface and the above-mentioned member that fascinates of above-mentioned sleeve is a pair of and clips above-mentioned live axle and establish;

The width of a pair of guide surface that fascinates of above-mentioned sleeve is greater than the width of the other end of the width of an end of above-mentioned component-bar linkage and above-mentioned component-bar linkage.