JPH05552B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fluid suction and discharge device such as a swash plate type fluid device.

[Prior Art] Fig. 4 is a vertical cross-sectional view of the main parts of an example of a conventional fluid suction/drainage device, Fig. 5 is a layout diagram showing the positional relationship of the components of the main parts, and Fig. 6 is Fig. 4B. FIG.

Referring to FIGS. 4 to 6, the conventional fluid suction and discharge device includes a cylinder block 1 having a plurality of cylinders 2, and a valve plate having suction holes 11 and discharge holes 12 formed corresponding to the cylinders 2. 10, and a suction valve 1 arranged on one side of the valve plate 10 to open and close the suction hole 11.
3, a cylinder gasket 17 arranged on one side of the suction valve 13, a cylinder head gasket 22 arranged on the other side of the valve plate 10, and a cylinder head gasket partitioned into a suction chamber 31 and a discharge chamber 32. 2
The cylinder head 30 is fixed to one end surface of the cylinder block 1 together with the cylinder gasket 17, the suction valve 13, the valve plate 10, and the cylinder head gasket 22. 13 has a plurality of leads 14 for opening and closing the suction hole 11 and a connecting portion 15 for connecting the plurality of leads 14, and cylinder block 1 has a recess 35 for accommodating the connecting portion 15 (for example, Japanese Patent Publication No. 54-100507 (Special Publication No. 58-20394)
(see official bulletin).

In the case of a conventional fluid suction/drainage device, the partition wall 33
was formed so as to pass outside the peripheral edge 35a of the recess 35. In addition, the cylinder gasket 17 and the cylinder head gasket 22
Conventionally, materials containing asbestos have been used.

[Problems to be Solved by the Invention] As described above, gaskets made of materials containing asbestos have been used in the past, but due to the problem of asbestos pollution, gaskets have recently been shifted to other materials. A typical gasket is a thin metal plate coated with rubber, and has recently come into widespread use.

However, when a gasket made of a thin metal plate coated with rubber is used in a fluid suction/drainage device having the above-mentioned configuration, the cylinder gasket 17 is inserted into the recess 35 of the cylinder block 1, as shown in FIG.
It is necessary to inculcate the teachings. At this time, the cylinder gasket 17 is sharply bent at the peripheral edge 35a of the recess 35, and this bending force causes the valve plate 10 to bend.
was slightly bent, and a gap D occurred. The cylinder gasket 17 is made of a thin metal plate coated with rubber.
The rubber coating was thin and had a low elastic absorption capacity as a gasket material, and could not fully absorb the deflection of the valve plate 10, often resulting in leakage.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fluid suction/drainage device that does not cause leakage even when a gasket made of a thin metal plate coated with rubber is used.

[Means for Solving the Problems] According to the present invention, a cylinder block having a plurality of cylinders, a valve plate having suction holes and discharge holes formed to correspond to the cylinders, and a cylinder block having a plurality of cylinders on one side of the valve plate. a suction valve arranged to open and close the suction hole;
A cylinder gasket arranged on one side of the suction valve, a cylinder head gasket arranged on the other side of the valve plate, and a partition wall that partitions the suction chamber and the discharge chamber and abuts the cylinder head gasket are arranged inside. has the above cylinder gasket, the above suction valve,
The suction valve includes a cylinder head fixed to one end surface of the cylinder block together with the valve plate and the cylinder head gasket, and the suction valve has a plurality of reeds for opening and closing the suction hole and a connecting portion for connecting the plurality of reeds. wherein the cylinder block has a recess for accommodating a portion of the cylinder gasket that is raised by the connecting portion, wherein at least a portion of the partition wall faces a peripheral edge of the recess. A fluid suction and discharge device characterized in that it is formed as follows is obtained.

[Function] In the case of the fluid suction/discharge device of the present invention, at least a part of the partition wall of the cylinder head is formed to face the peripheral edge of the recess of the cylinder block, so that it is not bent at the peripheral edge of the recess. Even if the valve plate tries to bend due to the cylinder head gasket, the valve plate will not bend because the partition wall presses the valve plate through the cylinder head gasket. Therefore, even if a gasket made of a thin metal plate coated with rubber is used, there will be no gap between the cylinder gasket and the cylinder block.
No leaks occur in this part.

[Embodiment] Fig. 1 is a longitudinal cross-sectional view of the main parts of a fluid suction/drainage device according to an embodiment of the present invention, a layout diagram showing the positional relationship of the components of the same main parts in Fig. 2, and Fig. 3 It is an enlarged view of part A of the figure.

Referring to FIGS. 1 to 3, a cylinder block 1 has a plurality of cylinders 2 formed on the same circumference at equal intervals and parallel to each other. A piston 3 is slidably inserted into each cylinder 2. A piston ring 4 is attached to the piston 3.

The valve plate 10 has a suction hole 11 and a discharge hole 12 formed to correspond to each cylinder 2.

A suction valve 13 is arranged on the side of the cylinder block 1 of the valve plate 10. The suction valve 13 includes a plurality of tongue-shaped leads 14 arranged radially, and a disk-shaped connecting portion 15 that connects the plurality of leads 14. Each lead 14 opens and closes the suction hole 11, respectively. Each lead 14 also has a discharge hole 12.
A through hole 16 is provided in a portion facing the. A cylinder gasket 17 is arranged on the side of the cylinder block 1 of the suction valve 13. On the other hand, valve plate 1
A discharge valve 20 is disposed on the opposite side of the cylinder block 1. A valve retainer 21 is stacked on the discharge valve 20. In addition, the valve plate 10
A cylinder head gasket 22 is disposed on the opposite side of the cylinder block 1. The suction valve 13, the discharge valve 20, and the valve retainer 21 are fixed to the valve plate 10 with bolts 23 and nuts 24. This constitutes a valve plate device 25.

The cylinder head 30 is approximately lid-shaped, and a partition wall 33 partitions the inside thereof into a suction chamber 31 and a discharge chamber 32.
have. When the cylinder head 30 is fixed to the cylinder block 1, this partition wall 33
It is adapted to abut against the cylinder head gasket 22. The cylinder head 30 is connected to the cylinder gasket 17 and the cylinder head gasket 22.
It is fixed to one end surface of the cylinder block 1 by a bolt 34 together with a valve plate device 25 having a valve plate device 25 arranged thereon. In this state, the cylinder gasket 17 is connected to the suction valve 1.
The raised portion of the cylinder gasket 17 is accommodated in a recess 35 formed in the center of one end surface of the cylinder block 1.

Further, when the cylinder head 30 is attached to the cylinder block 1, the partition wall 33 is formed such that a portion thereof faces the peripheral edge 35a of the recess 35. As a result, when the cylinder head 30 is attached to the cylinder block 1, the partition wall 33
The valve plate 10 is pressed down through the cylinder head gasket 22 to prevent the valve plate 10 from being bent. Of course, the entire partition wall 33 is recessed into the recess 35.
It may be arranged so as to face the peripheral edge 35a of.

[Effects of the Invention] Since the fluid intake and discharge device of the present invention has excellent airtightness around the valve plate, a thin metal plate coated with rubber can be used as the gasket. Of course, even in this case, compression leakage does not occur, and suction and discharge operations can be performed efficiently. Therefore, the present invention has made it possible for the first time to deal with the problem of asbestos pollution in a fluid suction/drainage device without any inconvenience.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of the main parts of a fluid suction/discharge device according to an embodiment of the present invention, FIG. 2 is a layout diagram showing the positional relationship of the components of the main parts, and FIG. 4 is a longitudinal cross-sectional view of the main parts of an example of a conventional fluid suction/drainage device, FIG. 5 is a layout diagram showing the positional relationship of the components of the main parts, and FIG. 6 is a diagram of part B in Fig. 4. It is an enlarged view. 1...Cylinder block, 2...Cylinder, 3
...Piston, 4...Piston ring, 10...
Valve plate, 11... Suction hole, 12... Discharge hole, 13...
... Suction hole, 14 ... Lead, 15 ... Connection part, 1
6...Through hole, 17...Cylinder gasket, 20
...Discharge valve, 21...Valve retainer, 22...
Cylinder head gasket, 23... Bolt, 2
4...Nut, 25...Valve plate device, 30...Cylinder head, 31...Suction chamber, 32...Discharge chamber,
33... Bulkhead, 34... Bolt, 35... Recess.

Claims (1)

[Claims] 1. A cylinder block having a plurality of cylinders, a valve plate having suction holes and discharge holes formed corresponding to the cylinders, a suction valve disposed on one side of the valve plate for opening and closing the suction holes, and The valve includes a cylinder gasket disposed on one side of the valve plate, a cylinder head gasket disposed on the other side of the valve plate, and a partition wall partitioning the valve into a suction chamber and a discharge chamber and abutting the cylinder head gasket. The cylinder gasket includes the cylinder gasket, the suction valve, the valve plate, and a cylinder head fixed to one end surface of the cylinder block together with the cylinder gasket, and the suction valve has a plurality of leads for opening and closing the suction hole. In the fluid suction/drainage device, the fluid suction/drainage device has a connecting portion that connects the plurality of leads, and the cylinder block has a recess that accommodates a portion of the cylinder gasket that is raised by the connecting portion. A fluid suction/drainage device characterized in that a portion is formed to face a peripheral edge of the recess.