JPH10176670A - Valve plate device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve plate device capable of improving its productivity and reducing its size and weight without using spring washers and nuts for reduction in the number of its assembling and control processes. SOLUTION: A valve plate device comprises a valve plate 2, a discharge valve 3 arranged on one side of the valve plate 2 for opening or closing discharge ports 21, a suction valve 4 arranged on the other side of the valve plate 2 for opening or closing suction ports 22, a valve retainer 5 which is formed with an internal thread 53 and is arranged on the one side to control the opening degree of the discharge valve 3, and a bolt 6. The bolt 6 is screwed into the valve retainer 5 such that its external thread 61 is brought into threaded engagement with the internal thread 53 to thereby fix the discharge valve 3, suction valve 4 and valve retainer 5 on the valve plate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve plate device such as a swash plate type compressor, and more particularly to a valve plate device characterized by fixing means such as a valve retainer.

[0002]

2. Description of the Related Art A conventional valve plate device will be described below with reference to FIGS. 3 is a longitudinal sectional view showing the structure of a conventional valve plate device, FIG. 4 shows the valve plate device shown in FIG. 3, (a) is a plan view seen from the suction valve side, and (b) FIG. 4 is a plan view seen from the discharge valve side.

A general valve plate device 1 used in a conventional swash plate type compressor or the like includes a valve plate 2 having a discharge hole 21 and a suction hole 22 and a discharge plate 21 disposed on one surface of the valve plate 2. A discharge valve 3 that opens and closes, and a suction hole 2 disposed on the other surface of the valve plate 2
A valve retainer 5 disposed on one side of the valve plate 2 to regulate the opening of the discharge valve 3;
It includes a bolt 6 for fixing the discharge valve 3, the suction valve 4, and the valve retainer 5 to the valve plate 2.

Conventionally, the discharge valve 3,
To fix the suction valve 4 and the valve retainer 5 to the valve plate 2, through holes are respectively formed in the discharge valve 3, the suction valve 4, and the valve retainer 5, and the bolt 6 is passed through these through holes. Spring washer 11 on bolt 6
And the nut 12 is screwed onto the bolt 6.

[0005]

However, in the above-mentioned prior art, the fixing of the discharge valve 3, the suction valve 4, and the valve retainer 5 to the valve plate 2 is performed by fitting a spring washer 11 to the bolt 6, and further, Since the nut 12 was screwed into 6, the number of assembling man-hours and management man-hours were large, and the productivity was poor. In particular, recently, as the size and weight of the valve plate device have been reduced, the number of components of the valve plate device has been reduced.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a valve plate device which does not use a spring washer and a nut and which can improve productivity, reduce size and reduce weight by reducing the number of assembling steps and management steps. Is to do.

[0007]

According to the present invention, a valve plate having a discharge hole and a suction hole, a discharge valve disposed on one surface of the valve plate to open and close the discharge hole, and the other surface of the valve plate And a valve retainer disposed on the one surface side for regulating the opening of the discharge valve, and fixing the discharge valve, the suction valve and the valve retainer to the valve plate. A valve plate device is provided which includes a female screw for screwing with the bolt in the valve retainer.

Further, according to the present invention, there is provided a valve plate device characterized in that a chrysanthemum seat for preventing rotation is formed on the bolt.

Further, according to the present invention, there is provided a valve plate device characterized in that a projection for stopping rotation of the bolt and the valve retainer is formed on a threaded portion of the bolt and the valve retainer. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a longitudinal sectional view showing the structure of the valve plate device of the present invention, and FIG.
(A) is a plan view seen from the suction valve side, and (b) is a plan view seen from the discharge valve side.

The valve plate device 1 of the present embodiment comprises a valve plate 2, a discharge valve 3, a suction valve 4, a valve retainer 5,
Bolt 6.

The valve plate 2 has a disk shape, and a plurality of discharge holes 21 are formed at an intermediate portion between the center and the outer peripheral edge of the valve plate 2 at a predetermined distance from the center of the valve plate 2 and are arranged at equal intervals.
A plurality of suction holes 22 are formed in the vicinity of the outer peripheral edge of the valve plate 2 so as to be separated from the center of the valve plate 2 by a predetermined distance and arranged at equal intervals. The discharge hole 21 and the suction hole 22
There are the same numbers, and they are arranged in the radial direction of the valve plate 2. Further, a through hole 23 for inserting the bolt 6 is formed in the center of the valve plate 2.

The discharge valve 3 is arranged on one surface of the valve plate 2. The discharge valve 3 extends radially and
It has the same number of tongue pieces 31 as one, and the tongue piece 31 opens and closes the discharge hole 21. Also, the discharge valve 3
A through-hole 32 for inserting the bolt 6 is formed at the center of the.

The suction valve 4 is arranged on the other surface of the valve plate 2. The suction valve 4 extends radially and has a suction port 2.
It has the same number of tongue pieces 41 as two, and the tongue piece 41 opens and closes the suction hole 22. Also, the suction valve 4
Has a hole 42 communicating with the discharge hole 21. Further, a through hole 43 for inserting the bolt 6 is formed in the center of the suction valve 4.

The valve retainer 5 is disposed on one side of the valve plate 2. The valve retainer 5 has substantially the same shape as the discharge valve 3, and has radially extending and the same number of tongue pieces 51 as the tongue pieces 31.
The opening degree of the tongue piece 31 is regulated. As shown in FIG. 1, the valve retainer 5 has a convex portion 52 at a central portion thereof, and a female screw portion 53 screwed with the male screw portion 61 of the bolt 6 is formed at the central portion of the convex portion 52. I have.
The convex portion 52 is a portion for securely fixing the valve retainer 5 to the valve plate 2. The height of the projection 52 in the axial direction is appropriately determined according to the tightening force required in the valve plate device 1.

The discharge valve 3, the suction valve 4, and the valve retainer 5 are fixed to the valve plate 2 by through holes 4 formed in the suction valve 4, the valve plate 2, and the discharge valve 3, respectively.
After passing the bolt 6 through 3, 23, 32, the bolt 6
Female screw 61 formed on the valve retainer 5
3 by screwing.

With the above-described configuration, the spring washer and the nut which have been conventionally required become unnecessary, and the number of parts can be reduced, and the amount of material used can be reduced by reducing the length of the bolt. Further, the number of parts can be reduced to reduce the number of assembling steps and the number of management steps, so that productivity can be improved.

Further, if a chrysanthemum seat is formed on the bolt 6, a detent effect can be obtained. Further, if a projection for stopping the rotation of the bolt 6 and the valve retainer 5 is formed on the screwed portion of the bolt 6 and the valve retainer 5 with a punch or the like, the effect of further preventing rotation can be obtained.

[0019]

According to the present invention, a spring washer and a nut, which are conventionally required, are not required, and the number of components can be reduced, and the amount of material used can be reduced by reducing the length of a bolt.

Further, according to the present invention, the number of parts can be reduced and the number of assembly steps and the number of management steps can be reduced, so that productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a structure of a valve plate device of the present invention.

2A and 2B show the valve plate device shown in FIG. 1, in which FIG. 2A is a plan view seen from a suction valve side, and FIG. 2B is a plan view seen from a discharge valve side.

FIG. 3 is a longitudinal sectional view showing the structure of a conventional valve plate device.

4A and 4B show the valve plate device shown in FIG. 3, in which FIG. 4A is a plan view as viewed from a suction valve side, and FIG. 4B is a plan view as viewed from a discharge valve side.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 valve plate device 2 valve plate 3 discharge valve 4 suction valve 5 valve retainer 6 bolt 21 discharge hole 22 suction hole 23 through hole 31 tongue piece 32 through hole 41 tongue piece 42 hole 43 through hole 51 tongue piece 52 convex part 53 Female thread 61 Male thread

Claims (3)

[Claims] 1. A valve plate having a discharge hole and a suction hole, a discharge valve arranged on one surface of the valve plate to open and close the discharge hole, and a suction valve arranged on another surface of the valve plate to open and close the suction hole. A valve plate device including a valve, a valve retainer disposed on the one surface side to regulate an opening degree of the discharge valve, and a bolt for fixing the discharge valve, the suction valve, and the valve retainer to the valve plate. A valve plate device, wherein a female screw to be screwed with the bolt is formed in the valve retainer. 2. The valve plate device according to claim 1, wherein a chrysanthemum seat for preventing rotation is formed on the bolt. 3. The valve plate device according to claim 1, wherein a projection for stopping rotation of the bolt and the valve retainer is formed on a screw portion of the bolt and the valve retainer.