JP2007187118A - Wobble plate type compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a wobble plate type compressor with low costs/low noise/low vibration by providing a completely new wobble plate rotation preventing mechanism. <P>SOLUTION: In the wobble plate type compressor, a plurality of pistons 2 are arranged substantially in parallel with a main spindle 1 rotated by a drive source, a wobble plate 7 and the piston 2 are connected via a connecting rod 8, and suction compression of fluid is carried out by converting rotary motion of a swash plate 6 rotating along with the main spindle into oscillating motion of the wobble plates 7, and reciprocating the pistons. A rotation preventing rod 14 preventing rotation of the wobble plate is connected to the wobble plate such that an angle with respect to the wobble can be freely changed, and the rotation preventing rod is fit in a rotation preventing hole provided in a compressor casing, and it is slidably positioned in the rotation preventing hole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an oscillating plate compressor, and more particularly to an oscillating plate compressor employing a new oscillating plate rotation prevention mechanism.

As a compressor that sucks and compresses fluid (for example, refrigerant in a refrigeration cycle), conventionally, a plurality of pistons are arranged in parallel to the main shaft, and the swing plate and the piston are connected via a connecting rod. There is known an oscillating plate compressor that converts rotational motion from a rotary swash plate into oscillating motion of an oscillating plate by a mechanism that prevents the rotation of the swash plate, and reciprocates a piston to suck and compress fluid (for example, Patent Document 1). As a rocking plate rotation prevention mechanism in this rocking plate compressor, a method using a combination of bevel gears, a method of guiding a slider with a rail, a universal joint method, and the like are used.
Japanese Unexamined Patent Publication No. 3-70877

  However, the rocking plate rotation prevention mechanism as described above causes more or less gear noise, abnormal vibration due to inconstant speed as in the rail guide system, mechanically expensive, etc. The problem remains. Moreover, since it is necessary to secure an internal space for installing the rotation prevention mechanism, a protruding portion is generated in the outer shape of the compressor, and there is a problem that it is difficult to reduce the size and weight of the entire compressor. Yes.

  In view of the limitations in the prior art, an object of the present invention is to provide a completely new rocking plate rotation prevention mechanism to realize a low cost, low noise, low vibration rocking plate compressor. is there.

  In order to solve the above-mentioned problems, a rocking plate compressor according to the present invention has a plurality of pistons arranged substantially parallel to a main shaft rotated by a driving source, and the rocking plate and the piston are connected via a connecting rod. In the oscillating plate type compressor that reciprocates the piston and sucks and compresses the fluid by converting the rotational motion of the swash plate that rotates together with the main shaft into the oscillating motion of the oscillating plate. A rotation prevention rod for preventing rotation of the oscillation plate is connected to the plate at an angle with respect to the oscillation plate, the rotation prevention rod is fitted into a rotation prevention hole provided in the compressor housing, and It consists of what is characterized by arrange | positioning slidably in a rotation prevention hole.

  In this oscillating plate compressor, the rotation blocking rod can be fitted to the rotation blocking hole with a clearance. Further, a structure in which a radial clearance is provided between the main shaft and the swash plate or / and the rocking plate may be employed.

  According to the oscillating plate compressor according to the present invention, an extremely simple oscillating plate rotation preventing mechanism by fitting a rotation preventing rod connected to the oscillating plate and a rotation preventing hole provided in the compressor housing. The problem of the abnormal vibration at high speed and the noise caused by the bevel gear due to the inconstant speed of the rail guide system, which was a drawback of the conventional rocking plate rotation prevention mechanism, can be solved. Since it can be arranged in the surplus space, it is possible to solve the shortage on the space and the jumping out of the outer shape caused by the presence of the rotation prevention mechanism. Moreover, since it can comprise with a simple rod, manufacturing cost can also be reduced. As a result, it is possible to realize an oscillating plate compressor that is quiet, has high speed, is structurally simple, is small in size, light in weight, and has high durability and reliability.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an oscillating plate compressor according to an embodiment of the present invention, and shows an example in which the present invention is applied to a variable capacity compressor. In FIG. 1, a rocking plate compressor 100 includes a plurality of pistons 2 reciprocatingly moving in corresponding cylinders 3 substantially in parallel to a main shaft 1 rotated by a driving force from a driving source (not shown). Arranged freely. A rotor 4 is fixed to the main shaft 1, and a swash plate 6 is connected to the rotor 4 via a hinge mechanism 5 so that the tilt angle can be varied. The swash plate 6 rotates together with the main shaft 1, but an oscillating plate 7 is provided adjacent to the swash plate 6 so as to receive the rotational force of the swash plate 6 and convert the rotational motion of the swash plate 6 into the oscillating motion. It has been. The oscillating plate 7 is prevented from rotating by a rotation preventing mechanism described later, and oscillates. A connecting rod 8 is connected to the swing plate 7 in a ball joint shape (ball joint portion 9), and a piston 2 is connected to the opposite end in a ball joint shape (ball joint portion 10). That is, the rotational motion of the swash plate 6 is converted into the swing motion of the swing plate 7, and the swing motion of the swing plate 7 is converted into the reciprocating motion of the piston 2 via the connecting rod 5. By reciprocation of the piston 2, fluid (for example, refrigerant gas) is sucked into the cylinder 3 from the suction chamber 11, compressed, discharged to the discharge chamber 12, and sent to the external circuit. Note that reference numeral 13 in FIG. 1 denotes a crank chamber.

  The rotation blocking mechanism of the swing plate 7 is configured as follows. Further, one or a plurality of rotation prevention rods 14 are connected to the rocking plate 7 at an angle with respect to the rocking plate 7. In the present embodiment, one end of the rotation preventing rod 14 is formed in the ball portion 15, and this ball portion 15 is connected to the swing plate 7 in a ball joint shape (ball joint portion 16). The rotation prevention rod 14 extends toward a cylinder block 17 serving as a compressor housing, and is slidable in a rotation prevention hole 18 provided in the compressor housing 17 in the extending direction of the hole 18. It is mated. That is, the rotation prevention rod 14 is arranged so as to freely reciprocate within the rotation prevention hole 18 with the swinging motion of the swing plate 7.

  A clearance 19 is appropriately provided between the rotation prevention rod 14 and the rotation prevention hole 18 so that the movement of the rotation prevention rod 14 (particularly, precession of the rotation prevention rod 14) is not disturbed. Yes. The precession movement of the rotation prevention rod 14 will be described later. The clearance for preventing the precession of the rotation preventing rod 14 from being prevented is not limited to between the rotation preventing rod 14 and the rotation preventing hole 18, or in addition thereto, from the main shaft 1 to the swash plate 6 and / or the swing plate. A structure in which a radial clearance is appropriately provided between 7 and 7 can also be adopted. In order to adapt the position and number of the rotation prevention rods 14 to the structure of the compressor, it is only necessary to arrange the rotation blocking rods 14 in any number of positions within the plane of the swing plate 7. It can be arranged at a position close to the main shaft 1 or can be arranged at an appropriate position between the adjacent cylinders 3, and it is preferable to efficiently use the surplus space.

  In the oscillating plate compressor according to the present embodiment configured as described above, when the oscillating plate 7 performs oscillating motion, the ball portion of the ball joint portion 16 on the oscillating plate 7 side of the rotation preventing rod 14. The 15 ball centers reciprocate in the axial direction of the rotation preventing hole 18 and simultaneously perform a circular motion with a minute radius in the radial direction. For this reason, since the rotation prevention rod 14 also performs precession, a clearance 19 corresponding to the precession is provided between the rotation prevention rod 14 and the rotation prevention hole 18, or the rocking plate 7 and / or the swash plate 6. The reciprocating motion of the rotation preventing rod 14 can be performed without interference by the total clearance including the radial clearance with the main shaft 1. Since the oscillating plate 7 receives the rotational force from the swash plate 6 along with the oscillating motion, the oscillating plate 7 itself tends to be rotated in the rotational direction. It is received by the inner wall surface. Therefore, the oscillating plate 7 performs only the oscillating motion without rotating, and the oscillating motion can be converted into the reciprocating motion of the piston 2. With this structure, it is possible to prevent the oscillating plate from moving at a non-uniform speed as in the method of rail-guide the slider, which is typical in the conventional rotation prevention mechanism.

  In this way, the problem of the abnormal vibration at high speed and the noise caused by the bevel gears associated with the inequal speed of the rail guide method, which was a drawback of the swing plate rotation prevention mechanism of the conventional swing plate compressor, Furthermore, since the rotation prevention mechanism can be arranged in an extra space near the shaft center, the problem of lack of space caused by the existence of the rotation prevention mechanism and the popping out of the outer shape can be solved. Further, since the rotation prevention mechanism can be configured with a simple rod, the manufacturing cost can be reduced. As a result, it is possible to realize a rocking plate compressor that is quiet, has high speed, is structurally simple, is compact, lightweight, low cost, and has high durability and reliability.

  The present invention can be applied not only to a variable capacity compressor but also to a fixed capacity compressor, or a compressor having a built-in electric motor in addition to external driving. In addition, with respect to the rotation prevention rod, it is possible to set appropriate shape dimensions, gaps, and the like in consideration of design durability and noise vibration. Furthermore, since the rotation prevention rod reciprocates, it can be used as an internal circulation pump for lubricating oil or the like, and if it is not used, an escape path may be provided so as not to perform unnecessary compression. Can be considered.

It is a longitudinal cross-sectional view of the rocking plate type compressor which concerns on one embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main shaft 2 Piston 3 Cylinder 4 Rotor 5 Hinge mechanism 6 Swash plate 7 Oscillating plate 8 Connecting rod 9, 10 Ball joint part 11 Suction chamber 12 Discharge chamber 13 Crank chamber 14 Rotation prevention rod 15 Ball part 16 Ball joint part 17 Compressor Cylinder block 18 as a housing Rotation prevention hole 19 Clearance

Claims (3)

  A plurality of pistons are arranged substantially parallel to the main shaft rotated by the drive source, the swing plate and the piston are connected via a connecting rod, and the rotational motion of the swash plate rotating with the main shaft is swung. In an oscillating plate type compressor that sucks and compresses fluid by reciprocating a piston by converting it into an oscillating motion of the plate, the oscillating plate is provided with a rotation prevention rod for preventing the oscillating plate from rotating. An oscillating plate characterized in that the rotation prevention rod is connected to a rotation prevention hole provided in the compressor casing and is slidably disposed in the rotation prevention hole. Compressor.   The rocking plate compressor according to claim 1, wherein the rotation prevention rod is fitted to the rotation prevention hole with a clearance.   The oscillating plate compressor according to claim 1, wherein a radial clearance is provided between the main shaft and the swash plate or / and the oscillating plate.

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