JPH09100779A - Compressor with electromagnetic clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate working, etc., to fix a stator of an electromagnetic clutch and simplify assembly work of the electromagnetic clutch. SOLUTION: A stator 41 is fixed on a front head 4 by spot-welding a stator installation plate 50 to a bottom surface part of the stator 41 on which an electromagnetic coil 40 of an electromagnetic clutch is fixed and casting this stator installation plate 50 simultaneously at the time of die-casting the front head 4. Consequently, working of a stator installation surface of the front head 4 and working of a screw hole are eliminated, and assembly work of the electromagnetic clutch is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor with an electromagnetic clutch.

[0002]

2. Description of the Related Art FIG. 4 is a vertical sectional view showing a part of a conventional compressor with an electromagnetic clutch.

A pulley mounting member 150 having a boss 150a into which the drive shaft 107 is inserted is fixed to the front head 104 of the compressor with a screw 151. The radial bearing 11 is attached to the boss 150a of the pulley mounting member 150.
A pulley 134 is rotatably mounted via the roller 6.
A belt (not shown) is hung on the pulley 134, and the driving force of the engine (not shown) is applied to the pulley 13 via the belt.
It is conveyed to 4.

The pulley mounting member 150 is an electromagnetic coil 140.
Is spot-welded to the fixed bottom surface of the stator 141, and the stator 141 is fixed to the front head 104 via the pulley mounting member 150.

An armature 142 is fixed to the front end of the drive shaft 107 with a bolt 143.
2 is opposed to the front end surface of the pulley 134 with a predetermined gap in the axial direction.

When the electromagnetic coil 140 is energized, the electromagnetic coil 140 attracts the armature 142 by an electromagnetic force, the armature 142 adheres to the front end surface of the pulley 134, and the armature 142 rotates integrally with the pulley 134. As a result, the rotational force of the engine is transmitted to the drive shaft 107.

[0007]

However, in the conventional compressor with an electromagnetic clutch, as described above, the pulley mounting member 15 is attached to the stator mounting surface 104b of the front head 104.
Since the bottom surface portion of the stator 141 abuts via 0 and the pulley mounting member 150 is fixed to the stator mounting surface 104b with the screw 151, the following problems occur.

First, the stator mounting surface 104b of the front head 104 must be machined with high accuracy, and at the same time, the stator mounting surface 104b must be provided with a screw hole 104a, resulting in poor workability.

Further, the stator 141 is attached to the front head 1.
In order to fix it to the stator mounting surface 104b of No. 04, the screw 151 must be inserted into the insertion hole 150a of the pulley mounting member 150, and the screw 151 must be screwed into the screw hole 104a of the stator mounting surface 104b. There was a problem that assembly of was complicated.

Another conventional example is one in which the stator is fixed to the front head by using a snap ring (Japanese Utility Model Laid-Open No. 64-11438). However, a groove is provided in a part of the stator and the groove is formed. Since the protrusion provided on the front head must be inserted into the groove and the snap ring must be mounted in the groove provided on the inner peripheral surface of the protrusion, the processing is complicated.

The present invention has been made in view of the above circumstances, and its object is to eliminate the need for machining for fixing the stator of the electromagnetic clutch and to simplify the assembling work of the electromagnetic clutch. It is to provide a compressor with an electromagnetic clutch that can be used.

[0012]

In order to solve the above-mentioned problems, a compressor with an electromagnetic clutch according to the present invention has an electromagnetic clutch provided with an electromagnetic clutch for intermittently transmitting a rotational force from a drive source to a compressor drive shaft. In the compressor, a part of the stator to which the electromagnetic coil of the electromagnetic clutch is fixed is fixed to the front side of the compressor housing by being cast at the same time when die-casting the compressor housing. Characterize.

With this structure, machining of the stator mounting surface of the compressor housing and machining of the screw holes are not required, and the electromagnetic clutch is easily assembled.

[0014]

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

FIG. 3 is a vertical cross-sectional view showing an entire swash plate type compressor with an electromagnetic clutch according to an embodiment of the present invention.

The front cylinder block 1 and the rear cylinder block 2 are joined to each other via an O-ring 13. Joined cylinder block 1,
A front head 4 is fixed to one end of the valve 2 via a valve plate 3, and a rear head 6 is fixed to the other end of the valve 2 via a valve plate 5. Cylinder blocks 1, 2,
The front head 4 and the rear head 6 form a compressor housing.

A drive shaft 7 is arranged at the center of the cylinder blocks 1 and 2, and a swash plate 8 is fixed to the drive shaft (compressor drive shaft) 7. The drive shaft 7 and the swash plate 8 are bearings. It is rotatably supported by 9, 10.

Further, the cylinder blocks 1 and 2 are provided with a plurality of cylinder bores 11. Each cylinder bore 1
Reference numerals 1 are parallel to the drive shaft 7 and are arranged at predetermined intervals in the circumferential direction around the drive shaft 7. A piston 12 is slidably accommodated in each cylinder bore 11. In each cylinder bore 11, compression chambers 21 and 22 are formed on both sides with the piston 12 interposed therebetween. The piston 12 is connected to the swash plate 8 via shoes 19 and 20, and the piston 1
2 reciprocates linearly in the cylinder bore 11 with the rotation of the swash plate 8.

The valve plates 3 and 5 are provided with suction ports 3a and 5a and discharge ports 3b and 5b. The compression chambers 21 and 22 and the suction chamber 2 are connected through the suction ports 3a and 5a.
3 is in communication with the compression chamber 2 through the discharge ports 3b and 5b.
1, 22 and the discharge chamber 24 communicate with each other. Suction valves 25 and 26 for opening and closing the suction ports 3a and 5a are provided on one surface of the valve plates 3 and 5, respectively. On the other surface of the valve plates 3 and 5, discharge valves 27 and 28 for opening and closing the discharge ports 3b and 5b are provided with rivets 31 and 32 together with stoppers 29 and 30 for suppressing the deformation amount of the discharge valves 27 and 28.
It is fixed at.

The front head 4 is equipped with an electromagnetic clutch 14 for connecting and disconnecting a rotational force from an engine (driving source) (not shown) to the drive shaft 7.

A pulley 34 is rotatably provided on the boss portion 4a of the front head 4 via a radial bearing 16. A belt (not shown) is hung on the pulley 34, and the driving force of the engine (not shown) is transmitted to the pulley 34 via the belt.

Inside the pulley 34, a stator 41 to which an electromagnetic coil 40 is fixed is housed.

An armature 42 is fixed to the front end of the drive shaft 7 with bolts 43. The armature 42 faces the front end surface of the pulley 34 with a predetermined gap in the axial direction.

FIG. 1 is a sectional view showing the relationship between the stator of the electromagnetic clutch and the front head of the swash plate type compressor, and FIG. 2 is a view as seen from the direction of arrow A in FIG.

An annular stator mounting plate 50 is spot-welded to the bottom surface of the stator 41 (see FIG. 2), and the stator mounting plate 50 is simultaneously cast during die casting of the front head 4. At this time, the earth side electrode 40b of the electromagnetic coil 40 is simultaneously cast as shown in FIG.
On the other hand, since the power supply side electrode 40a of the electromagnetic coil 40 is not cast, it is exposed to the outside. In this embodiment, the stator mounting plate 50 constitutes a part of the stator.

Next, the operation of the swash plate compressor with an electromagnetic clutch according to this embodiment will be described.

When the electromagnetic coil 40 is energized, the electromagnetic coil 40 attracts the armature 42 by an electromagnetic force,
The armature 42 is bonded to the front end surface of the pulley 34, and the armature 42 rotates integrally with the pulley 34. As a result, the rotational force of the engine is transmitted to the drive shaft 7.

When the rotary shaft 7 rotates, the swash plate 8 also rotates integrally. Since the sliding surface of the swash plate 8 is inclined with respect to the plane perpendicular to the rotation center of the rotating shaft 7, the piston 12 is
The linear reciprocating motion is performed in the cylinder bore 11 by the rotation of the. When the swash plate 8 rotates 1/2 from when the piston 12 is at the position closest to the valve plate 3 (the position shown in FIG. 3) (when the piston 12 is at the top dead center on the compression chamber 21 side), The piston 12 moves to the right side in FIG. 3, the suction stroke is completed on the compression chamber 21 side, and the compression stroke is completed on the compression chamber 22 side. From this state, the swash plate 8 is 1 more
When it rotates by / 2, the suction stroke is completed on the side of the compression chamber 22 and the compression stroke is completed on the side of the compression chamber 21.

In the intake stroke, the intake valves 25 and 26 are opened,
From the suction chamber 23 to the compression chamber 2 through the suction ports 3a and 5a.
Refrigerant gas flows into 1, 22. In the compression stroke, compression chamber 2
The refrigerant gas compressed in 1, 22 opens the discharge valves 27, 28, and the compression chambers 21, 22 pass through the discharge ports 3b, 5b.
High-pressure refrigerant gas is discharged from the discharge chamber 24.

When the electromagnetic coil 40 is de-energized, the armature 42 separates from the front end face of the pulley 34,
The transmission of the rotational force of the engine to the drive shaft 7 is cut off, and the operation of the swash plate compressor is stopped.

According to the swash plate compressor with an electromagnetic clutch according to this embodiment, the stator mounting plate 50, which is spot-welded to the bottom surface of the stator 41 in advance, is simultaneously cast during die casting of the front head 4. Since the stator 41 is fixed to the front head 4, machining of the stator mounting surface of the front head 4 and machining of screw holes are unnecessary, and the electromagnetic clutch assembly work is facilitated.

In the above-described embodiment, the case where the present invention is applied to the swash plate compressor has been described, but the scope of application of the present invention is not limited to this, and other applications such as an oscillating plate compressor and a vane compressor are also possible. It can be applied to various compressors.

[0033]

As described above, according to the compressor with the electromagnetic clutch of the present invention, the post-installation process of the stator can be reduced, and as a result, the machining of the stator mounting surface of the compressor housing and the machining of the screw holes become unnecessary. In addition, the work of assembling the electromagnetic clutch becomes easy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a relationship between a stator of an electromagnetic clutch and a front head of a swash plate compressor.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 is a vertical cross-sectional view showing an entire swash plate compressor with an electromagnetic clutch according to an embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a part of a conventional compressor with an electromagnetic clutch.

[Explanation of symbols]

 4 Front Head 7 Drive Shaft 34 Electromagnetic Clutch 40 Electromagnetic Coil 41 Stator 50 Stator Mounting Plate

Claims (1)

[Claims] 1. A compressor with an electromagnetic clutch comprising an electromagnetic clutch for intermittently transmitting a rotational force from a drive source to a compressor drive shaft, wherein a part of a stator to which an electromagnetic coil of the electromagnetic clutch is fixed is compressed. A compressor with an electromagnetic clutch, which is fixed to the front side of the compressor housing by being cast at the same time when die-casting the machine housing.