JPH04214968A - Axial piston compressor - Google Patents

Abstract

PURPOSE: To provide an axial piston compressor in which only a tensile force in a precessional motion of a swash plate is transmitted to a piston. CONSTITUTION: An axial piston compressor is equipped with at least one piston 21 driven by a swash plate 16, which converts the rotating motion into reciprocations of the piston, and a projection 19 to transmit the generated axial direction motions is coupled with the piston through a resilient structural member 29 to transmit the tensile motion to the piston.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axial piston compressor according to claim 1.

0002

2. Description of the Related Art In the above-mentioned known axial piston compressor, the transmission mechanism from the swash plate to the piston is configured to transmit only the pressing force, which may be disadvantageous.

0003

SUMMARY OF THE INVENTION It is an object of the invention to overcome the disadvantages of the prior art.

0004

The above object is achieved according to the invention by an axial piston compressor having the features of claim 1.

[0005]

The invention provides the advantage that the force transmitted from the ball joint or the swash plate to the piston for generating a stroke is introduced into the piston as a tensile force via an elastic structural member. This structural member also receives the radial movements that occur during the sliding motion.

Further advantages of the invention result from claims 2 to 5.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a casing is designated at 10. The casing has a hollow cylindrical upper portion 10A and a hollow cylindrical lower portion 10B. The casing is sealed on both sides by covers 11, 12. An inwardly directed cylindrical projection 15 is formed in the lower portion 10B, and a drive shaft 15 is supported in a double ball bearing 14 within the projection. The drive shaft receives the swash plate at its upper end located approximately in the center of the casing. The swash plate is rolling bearing 1 here.
7 at an angle to the axis of the drive shaft.

The swashplate has one or more protruding pins 19, which can be clearly seen in FIGS. The pin projects into a notch 20 through which the double piston 21 passes. The double piston is closely slidably guided within a vertical hole 22 provided on the side of the casing 10.
The vertical hole extends parallel to the drive shaft 15. The double piston is substantially hollow and has a cylindrical opening 24 on both the upper and lower sides, into which a projection 25 formed in the piston projects. A suction valve 2 of any construction type is provided between this protrusion and the open end face of the piston.
6. For example, a butterfly valve is arranged. A plurality of holes 27 open into the opening 24 and communicate with the hollow interior of the double piston and thus with the interior of the casing.

A ball-shaped body 28 (see FIGS. 2 and 3) is arranged on the pin 19, and an elongated, elastic structural member, in particular a stamped curved member made of spring steel, is arranged on the ball-shaped body. This structural element extends on both sides into the respective head part of the piston, ie as far as the projection 25. The projection is hollow on the inside and receives the curved end of the structural element therein, ie the structural element is fixedly supported here. The shape of this structural member is further explained in Figure 2 below.
, is explained in detail by FIG. This structural element 29 provides that the radial movement of the swash plate 16 during rotation is counteracted by the deformation of the structural element that tensions the piston, ie that the structural element exerts a tension on the piston. The unbroken lower part of the double piston is constructed as described above.

In both covers, there are cutouts 30 and 31 on one side facing the casing, through which the atmosphere is connected to the inside of the casing, and on the other side there are cutouts 30 and 31.
2, 33, through which the air compressed by the double piston during its movement reaches the user via a flap valve, which is not shown but is generally known. Suction takes place through the internal space by a hollow double piston, the suction valve of which for one end face of the piston is opened on descent and the other closed;
These alternate each stroke.

FIGS. 2 and 3 show another embodiment of the structural member. The structural element has an internally encircling bulge 35 with which the structural element is placed on a ring 36 which is supported on the bulbous body 28. Two arms 38, 39 extend radially outward from this ring.
The arm terminates in an eyelet-like curvature 37. The curved part is firmly clamped in a corresponding recess 38 of the piston. FIG. 3 is a sectional view taken along line III--III in FIG. 2. The structural element 29B according to FIG.
It has 9.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an axial piston compressor.

FIG. 2 is a diagram showing one embodiment of important components of an axial piston compressor.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 shows another embodiment of important components of an axial piston compressor.

[Explanation of symbols]

10 Casing 10A Upper part 10B Lower part 11, 12 Cover 13 Projection part 14 Double piston 15 Drive shaft 16 Swash plate 17 Rolling bearing 19 Pin 20, 30, 31, 32, 33 Notch 21
Double piston 22 Vertical hole 24 Opening 25 Projection 26 Suction valve 27 Hole 28 Ball-shaped body 29, 29B Structural member 35 Protrusion 36 Ring 37 Curved portion 38, 39 Arm

Claims (5)

[Claims] 1. An axial piston compressor comprising at least one piston (21) driven by a swash plate (16), the swash plate converting rotational movement into reciprocating movement of the piston. In the type equipped with a protrusion (19) for transmitting axial motion, the protrusion (
Axial piston compressor, characterized in that 19) is connected to the piston (21) via an elastic structural member (29) which transmits the tensile movement to the piston. 2. The axial piston compressor as claimed in claim 1, wherein the elastic structural member is a stamped curved member made of spring steel, for example. [Claim 3] The swash plate is a ball bearing (16, 17),
A projection (19) is formed on the ball bearing, a ball-shaped body (28) is arranged on the projection, and the structural member is supported on the ball-shaped body, in particular with the interposition of an intermediate ring (36). There is,
The axial piston compressor according to claim 2. 4. The piston (21) is constructed as a double piston, in which a structural member extends into its hollow interior, the structural member having a curvature which forms a projection formed here in the piston head. 4. The axial piston compressor according to claim 1, wherein the axial piston compressor is fixedly held in (25). Claim 5: A suction valve (2
6) The axial piston compressor according to claim 1, wherein: 6) is arranged.