JP2007009942A - Open type compressor for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an open type compressor for a vehicle capable of preventing adhesion of sand, mud, mud water, and water onto an absorption face of an electromagnetic clutch and preventing adhesion of sand, mud, mud water, and water onto a shaft sealing device. <P>SOLUTION: This open type compressor for the vehicle is provided with a main shaft 1, a compression mechanism driven by the main shaft, and a housing for storing the compression mechanism. The main shaft passes through the housing, is extended to the outside of the housing, and is provided with the electromagnetic clutch 12 having a pulley connected with a driving source through a belt and supported rotatably by the housing, a coil stored in an annular channel formed in the pulley, and an armature fixed to an end part of the main shaft extended to the outside of the housing and attracted onto an annular channel bottom wall of the pulley by magnetic force generated by the coil to transmit power of the driving source to the main shaft and a dust cover 15 whose peripheral fringe part is abutted and fixed on the pulley to cover the armature. A sealing member is arranged in a part where the peripheral fringe part of the dust cover is abutted on the pulley. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an open type compressor for a vehicle.

The main shaft includes a main shaft, a compression mechanism driven by the main shaft, and a housing that accommodates the compression mechanism. The main shaft extends through the housing to the outside of the housing, and is connected to a driving source via a belt and is rotated by the housing. Pulley supported, coil housed in an annular groove formed in the pulley, and an annular groove bottom wall of the pulley by a magnetic force fixed to the end of the main shaft extending out of the housing and generated by the coil Patent Document 1 discloses an open type compressor for a vehicle that includes an electromagnetic clutch that has an armature that is attracted to the main shaft and transmits the power of a drive source to a main shaft.
Furthermore, an open type compressor for a vehicle is also known that includes a dust cover whose peripheral edge is in contact with and fixed to a pulley and covers the armature.
JP 2001-289177 A

In a conventional open compressor for a vehicle having a dust cover, sand, mud, muddy water, water, etc. enter the dust cover through the clearance between the periphery of the dust cover and the pulley, and the pulley Adhering to the armature adsorption surface could cause electromagnetic clutch adsorption failure or seizure. Further, sand, mud, muddy water, water, or the like that has entered the dust cover may enter the shaft sealing device disposed in the housing penetration of the main shaft, causing refrigerant leakage, lubricating oil leakage, and the like.
The present invention has been made in view of the above problems, and an object of the present invention is to provide an open-type compressor for a vehicle in which adhesion of sand, mud, muddy water, water or the like to an electromagnetic clutch adsorption surface is prevented. Furthermore, an object of the present invention is to provide an open type compressor for vehicles in which adhesion of shafts such as sand, mud, mud water, and water is prevented.

In order to solve the above-described problems, the present invention includes a main shaft, a compression mechanism driven by the main shaft, and a housing that houses the compression mechanism, the main shaft extending through the housing to the outside of the housing, and a belt. A pulley connected to the drive source via the housing and rotatably supported by the housing, a coil housed in an annular groove formed in the pulley, and fixed to an end of the main shaft extending out of the housing An electromagnetic clutch having an armature that is attracted to the bottom wall of the annular groove of the pulley by the magnetic force generated by the coil and transmits the power of the driving source to the main shaft, and a dust cover that covers the armature with its peripheral edge abutting and fixed to the pulley A vehicular open-type compressor is provided, wherein a seal member is disposed at a contact portion of the dust cover peripheral portion with a pulley.
The present invention also includes a main shaft, a compression mechanism driven by the main shaft, and a housing that accommodates the compression mechanism. The main shaft extends out of the housing through the housing, and is further connected to a drive source through a belt. And a pulley rotatably supported by the housing, a coil housed in an annular groove formed in the pulley, and a magnetic force generated by the coil fixed to the end of the main shaft extending outside the housing. An electromagnetic clutch having an armature that is attracted to the bottom wall of the annular groove of the pulley and transmits the power of the driving source to the main shaft, and a dust cover that covers the armature with its peripheral portion abutting and fixed to the pulley, and the peripheral portion of the dust cover Is provided with a sealing member. An open type compressor for vehicles is provided.
In the open compressor for a vehicle according to the present invention, a seal member is disposed at the contact portion of the dust cover peripheral portion covering the armature with the pulley, or the peripheral portion of the dust cover covering the armature is formed of the seal member. Therefore, sand, mud, muddy water, water, etc. cannot enter the dust cover through the contact part between the dust cover peripheral part and the pulley, and therefore, the electromagnetic clutch suction surface and the shaft seal device are not allowed to enter. Can not adhere. As a result, it is possible to prevent electromagnetic clutch adsorption failure, seizure, shaft seal device refrigerant leakage, and lubricating oil leakage due to adhesion of sand, mud, muddy water, water, and the like.

In a preferred embodiment of the present invention, a closing member for closing a slit formed in the annular groove bottom wall of the pulley is disposed.
A very small amount of sand and mud are passed through a minute gap between the annular groove formed in the pulley and the coil accommodated in the groove, and a magnetic circuit forming slit formed in the bottom wall of the annular groove. Muddy water, water, etc. may enter the dust cover. By disposing a closing member that closes the slit formed in the annular groove bottom wall of the pulley, it is possible to completely prevent sand, mud, muddy water, water, and the like from entering the dust cover.

In the open compressor for a vehicle according to the present invention, the seal member is disposed at the contact portion with the pulley at the periphery of the dust cover that covers the armature, or the dust cover that covers the armature is formed of the seal member. Sand, mud, muddy water, water, etc. cannot enter the dust cover via the contact part between the dust cover peripheral part and the pulley, and therefore adhere to the electromagnetic clutch suction surface and shaft seal device. I can't. As a result, it is possible to prevent electromagnetic clutch adsorption failure, seizure, shaft seal device refrigerant leakage, and lubricating oil leakage due to adhesion of sand, mud, muddy water, water, and the like.

  An open type compressor for vehicles concerning an example of the present invention is explained.

As shown in FIG. 1, a swaying compressor 1 for a vehicle air conditioner 1 includes a main shaft 2, a rotor 3 fixed to the main shaft 2, and a rotor 3 that is inclined with respect to the main shaft 2 and is relatively rotatable. A rocking plate 4 that engages with the rocking plate, a rotation blocking member (not shown) that blocks the rotation of the rocking plate 4, a piston 5 that engages with the rocking plate 4, and a cylinder bore in which the piston 5 is slidably inserted. A cylinder block 6 having a crank chamber 7 having the main shaft 2, the rotor 3, and the swing plate 4; a flot housing 8 fixed to one end of the cylinder block 6; a suction hole and a discharge hole; A cylinder head 10 which is fixed to the other end of the cylinder block 6 through a valve plate 9 formed with a suction chamber 10a and a discharge chamber 10b, and a suction valve and a discharge valve (not shown) mounted on the valve plate 9 It has. The flot housing 8, the cylinder block 6, and the cylinder head 10 cooperate to form a housing that accommodates a compression mechanism including the main shaft 2, the rotor 3, the swing plate 4, the piston 5, and the like.
The main shaft 2 extends through the boss 8a of the flot housing 8 to the outside of the housing. A shaft seal device 11 is disposed in the main shaft penetrating portion of the boss portion 8a.

An electromagnetic clutch 12 is attached to the boss portion 8a. The electromagnetic clutch 12 is connected to a vehicle engine (not shown) via a belt (not shown) and is formed in an annular pulley 12a having a groove-shaped cross section rotatably supported by a boss portion 8a via a bearing 13 and a pulley 12a. The coil 12c received in the annular groove 12b and fixed to the front housing 8 and the magnetic force generated by the coil 12c and fixed to the end of the main shaft 2 extending outside the housing using the nut 14 And an armature 12e that is adsorbed by the annular groove bottom wall 12d of the pulley 12a and transmits the power of the vehicle engine to the main shaft 2. A non-magnetic resin friction liner 12f is embedded and fixed on the surface facing the armature 12e of the annular groove bottom wall 12d, and a slit 12g for forming a magnetic circuit is formed on the annular groove bottom wall 12d. Yes.
A shallow bottomed cylindrical dust cover 15 is disposed to face the armature 12e. An outer flange 15a that is formed at the open end of the dust cover 15 and forms the peripheral edge of the dust cover 15 is in contact with and fixed to the end surface of the pulley 12a. As shown in FIGS. 1 and 2, an O-ring 16 is disposed at a contact portion between the curved portion of the base portion of the outer flange 15a and the stepped corner portion formed on the end surface of the pulley 12a.
As shown in FIG. 3, a closing plate 17 made of a nonmagnetic material such as copper or resin disposed in the annular groove 12b closes the slit 12g formed in the annular groove bottom wall 12d.

  In the oscillating compressor 1 for a vehicle air conditioner, rotational power is transmitted from a vehicle engine (not shown) to the main shaft 2 via the electromagnetic clutch 12, and the main shaft 2 rotates. As the main shaft 2 rotates, the rotor 3 rotates, the swing plate 4 swings, and the piston 5 reciprocates. The refrigerant gas returned from the evaporator of the air conditioner to the suction chamber 10a is sucked into the cylinder bore 6a through the suction hole and the suction valve of the valve plate 9, is compressed in the cylinder bore 6a, and the discharge hole and the discharge valve of the valve plate 9 are compressed. And discharged from the discharge chamber 10b to the condenser of the air conditioner.

In the oscillating compressor 1 for a vehicle air conditioner, an O-ring 16 is disposed at a contact portion with the end face of the pulley 12a of the outer flange 15a that forms the peripheral portion of the dust cover 15 that covers the armature 12e of the electromagnetic clutch 12. Since the portion is sealed, sand, mud, muddy water, water, etc. cannot enter the dust cover 15 through the contact portion between the peripheral portion of the dust cover 15 and the end surface of the pulley 12a. Furthermore, the boss portion 8a cannot be penetrated. Accordingly, sand, mud, muddy water, water, and the like cannot adhere to the surface facing the armature 12e of the annular groove bottom wall 12d, which is the adsorption surface of the electromagnetic clutch 12, and further adhere to the shaft seal device 11. Can not do it. As a result, poor adsorption and seizure of the electromagnetic clutch 12 due to adhesion of sand, mud, mud water, water, etc., and further, leakage of refrigerant and lubricating oil from the shaft seal device 11 are prevented.

A minute gap between the annular groove 12b formed in the pulley 12a and the coil 12c accommodated in the annular groove 12b, more precisely, a side surface of the annular groove 12b and a side surface of the coil case 12c ′ storing the coil 12c. A small amount of sand, mud, muddy water, water, etc. can enter the dust cover 15 through the minute gap between them and the slit 12g for forming the magnetic circuit formed in the bottom wall 12d of the annular groove 12b. There is sex. By disposing the closing plate 17 that closes the slit 12g formed in the annular groove bottom wall 12d of the pulley 12a, it is possible to completely prevent the entry of sand, mud, muddy water, water, etc. into the dust cover 15.

Instead of the O-ring 16, a rectangular ring having a rectangular cross section or a gasket may be provided. Instead of providing the O-ring 16, the entire dust cover 15 or the peripheral edge of the dust cover 15 may be formed of a sealing member such as a gasket. Since the dust cover 15 itself seals the contact portion between the peripheral portion of the dust cover 15 and the pulley 12a, sand, mud, muddy water, water, and the like are contact portions between the peripheral portion of the dust cover 15 and the pulley 12a. It is not possible to enter the dust cover 15 via, and further, it is not possible to enter the boss portion 8a. Accordingly, sand, mud, muddy water, water, and the like cannot adhere to the surface facing the armature 12e of the annular groove bottom wall 12d, which is the adsorption surface of the electromagnetic clutch 12, and further adhere to the shaft seal device 11. Can not do it. As a result, poor adsorption and seizure of the electromagnetic clutch 12 due to adhesion of sand, mud, mud water, water, etc., and further, leakage of refrigerant and lubricating oil from the shaft seal device 11 are prevented.

In addition to the arrangement of the closing plate 17, all the slits 12g may be closed with a friction liner 12f as shown in FIG. 4, or all the slits 12g as shown in FIG. All the slits 12g may be closed by embedding a closing member 18 made of a non-magnetic material. 4 and 5, the closing plate 17 may be removed.

The present invention is widely applicable to various open type compressors equipped with electromagnetic clutches.

It is sectional drawing of the rocking plate type compressor which concerns on the Example of this invention. It is a partial expanded sectional view of the rocking plate type compressor concerning the example of the present invention. It is a partial expanded sectional view of the rocking plate type compressor concerning the example of the present invention. It is a partial expanded sectional view of the rocking plate type compressor concerning the example of the present invention. It is a partial expanded sectional view of the rocking plate type compressor concerning the example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oscillating plate type compressor 2 Main shaft 4 Oscillating plate 5 Piston 11 Shaft seal device 12 Electromagnetic clutch 15 Dust cover 16 O-ring 17 Closing plate 18 Closing member

Claims (3)

The main shaft includes a main shaft, a compression mechanism driven by the main shaft, and a housing that accommodates the compression mechanism. The main shaft extends through the housing to the outside of the housing, and is connected to a driving source via a belt and is rotated by the housing. Pulley supported, coil housed in an annular groove formed in the pulley, and an annular groove bottom wall of the pulley by a magnetic force fixed to the end of the main shaft extending out of the housing and generated by the coil An electromagnetic clutch having an armature that is attracted to the main shaft and transmits the power of the driving source to the main shaft, and a dust cover that is fixed to the pulley so that the peripheral portion is in contact with the pulley and covers the armature. A vehicular open-type compressor, wherein a seal member is disposed on the vehicle. The main shaft includes a main shaft, a compression mechanism driven by the main shaft, and a housing that accommodates the compression mechanism. The main shaft extends through the housing to the outside of the housing, and is connected to a driving source via a belt and is rotated by the housing. Pulley supported, coil housed in an annular groove formed in the pulley, and an annular groove bottom wall of the pulley by a magnetic force fixed to the end of the main shaft extending out of the housing and generated by the coil An electromagnetic clutch having an armature that is attracted to the main shaft and transmits the power of the drive source to the main shaft, and a dust cover that is fixedly abutted on the pulley and covers the armature, and the periphery of the dust cover is formed of a seal member. An open type compressor for a vehicle. The open type compressor for vehicles according to claim 1 or 2, wherein a closing member for closing a slit formed in the bottom wall of the annular groove of the pulley is disposed.

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