JPH1089244A - Swash plate compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve abrasion resistance as well as to improve processing productivity by forming a holding reference surface to be taking as a proper position of a reference surface based on the position in which a guide shoe is to be held on a holding surface, and fixing holding sharing members on the holding part by matching the reference surface to the holding reference surface. SOLUTION: An attaching reference surface 27 to which a holding sharing members 22 are to be attached is formed on a holding part 21 of a piston 20. A body part 28 projecting from the attaching reference surface 27 in the perpendicular direction and for holding respective holding sharing members 22 is formed on the holding part 21, and grooves 29 matching the wedge shape of the end of the base part is formed on the body part 28 perpendicularly to the attaching reference surface 27. The attaching reference surface 27 and the grooves 29 are brought in contact with the attaching reference surface 27 while fitting the bas part of the holding sharing member 22 to the grooves 29, and the center of the holding surface is matched to the center axis of the piston 20 similarly to the conventional piston. Therefore, the holding reference surface to be taking as the proper position of the reference surfaces 25 based on the position in which the attaching reference surface 27 and the guide shoe are to be held is made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swash plate compressor constituting an air conditioner for a vehicle.

[0002]

2. Description of the Related Art As a conventional compressor constituting an automotive air conditioner for air-conditioning the cabin of an automobile, FIG.
There is a swash plate type compressor as shown in FIG.

In this compressor, a rotational force is input to a drive shaft 3 from an output shaft of an engine (not shown) via a pulley 1 and a magnet clutch 2. A slider 4 is slidably mounted. A support member 5 is fixed to the drive shaft 3 so as to rotate integrally therewith. The slider 4 and the support member 5 support a swash plate 6 formed in a donut shape so as to be movable in the center axis direction of the drive shaft 3 and swingably. The swash plate 6 has a state in which the slider 4 is fitted into a hole at the center, and one end thereof is locked by the support member 5, so that the swash plate 6 rotates while circumscribing the slider 4 with the rotation of the drive shaft 3. It has become. Also, the slope 6
Since the slider 4 can slide on the drive shaft 3, it can swing freely in the direction of the center axis of the drive shaft 3. Further, a cylinder 7 is formed parallel to the central axis of the drive shaft 3, and a piston 8 is incorporated inside the cylinder 7 so as to be slidable in the central axis direction. At the end of the piston 8, a holding portion 10 is formed which holds a guide shoe 9 which is disposed to face the swash plate 6 and faces the swash plate 6 and on which the swash plate 6 slides. That is, the holding unit 10 converts the swinging motion of the swash plate 6 into the reciprocating motion of the piston 8 via the guide shoe 9.

[0004] With such a configuration, the swash plate 6 rotates while the drive shaft 3 rotates,
By transmitting this oscillating motion to the piston 8,
The function of a compressor that compresses and discharges the sucked refrigerant while the piston 8 reciprocates in the cylinder 7 works.

Incidentally, among the components constituting the conventional swash plate type compressor, the guide shoe 9 and the holding portion 10 for holding the guide shoe 9 tend to be insufficient in lubricating oil structurally. In order to prevent noise and vibration from occurring and to improve durability, there is a demand for improvement in wear resistance.

Conventionally, the piston 8 is formed by forging an aluminum material in order to reduce the weight, and the holding portion 10 is subjected to a surface treatment such as so-called zinc plating.
Improved wear resistance. On the other hand, the guide shoe 9
In order to prevent welding with the holding part 10, the holding part 10 is formed of a harder steel or the like, for example, JIS material symbol SUJ2 bearing steel or the like.

The holding section 10 always holds the sliding guide shoe 9 and receives the oscillating force of the swash plate 6 on the contact surface with the small guide shoe 9. Also, the processing accuracy has been improved to improve wear resistance, and conventionally, for example, precision processing is performed as shown in FIG.

FIG. 1 is a cross-sectional view of a piston 8, and a holding portion 10 has a holding surface 11 formed in a curved shape in accordance with the surface shape of a partially spherical guide shoe 9 not shown. Are arranged and formed so as to face each other in the direction of the central axis.

Conventionally, the holding surface 11 is formed into a curved surface according to the surface shape of the guide shoe 9 by a cutting tool 12 called a gun drill having a spherical blade at the tip as shown in the figure.

[0010]

SUMMARY OF THE INVENTION Such a holding surface 11
In the above-mentioned processing, the two holding surfaces 11 facing each other cannot be processed at the same time. Therefore, conventionally, after the processing of one holding surface 11, the other holding surface 11 is processed.

However, in the processing of the respective holding surfaces 11 functioning as a pair as described above, if the mutual processing reference positions are shifted, the formed shape is distorted and the holding function of the holding surface 11 can be performed well. It is necessary to accurately adjust the respective processing standards because they may disappear, but this takes time, that is, it takes time to position the cutting tool 12, and the productivity of the shape processing of the holding surface 11 is increased. There was a problem that was bad.

On the other hand, in the prior art, for example,
As in the compressor disclosed in Japanese Patent No. 228882, there is a compressor in which a holding portion is formed separately from a piston and slidably fitted to the piston so as not to require such processing. However, such a configuration solves the problem of the productivity described above. However, since the number of sliding points increases, it is disadvantageous in that the wear resistance is improved as described above. There was a risk of becoming.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and provides a swash plate compressor capable of improving machining productivity and improving wear resistance. With the goal.

[0014]

In order to achieve the above object, the present invention provides a drive shaft for inputting a rotational force, which is provided with a swash plate that can rotate while being inclined with respect to the drive shaft. A cylinder is formed in parallel with the center axis, and a piston is slidably incorporated in the center axis direction inside the cylinder. A swash plate type compressor provided with a holding portion for slidably holding a guide shoe for converting the swing of the swash plate into a reciprocating motion of the piston and transmitting the same while adjusting the shape to the partial spherical shape of the guide shoe. A holding surface is formed, and a plurality of holding sharing members for mutually holding the guide shoe are formed with a positioning shape portion for positioning each other. At least one of the holding sharing members holds the guide shoe. Forming a reference surface serving as a reference for positioning in the portion, forming a holding reference surface serving as an appropriate position of the reference surface based on a position where the guide shoe is to be held on the holding portion, and setting the reference surface to the holding reference It is characterized in that the holding sharing member is fixed to the holding portion in accordance with a surface.

With this configuration, the processing for forming the holding surface can be performed by forming one holding surface for one holding sharing member. Also,
Since the holding and sharing member can be formed separately from the piston, the holding surface can be formed of a material having better wear resistance than before.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a swash plate type compressor according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a piston of the swash plate compressor of the present invention, and FIG. 2 is a side view of a piston of the swash plate compressor of the present invention. FIG. 3 is an external view of a holding / sharing member incorporated in the piston of FIG. 1, and FIG. 4 is a state diagram when the holding / sharing member is incorporated in the piston. Here, the members other than the piston and the holding portion are the same as those constituting the conventional swash plate type compressor, and therefore, the description thereof will be omitted.

As shown in FIGS. 1 and 2, the piston 20 of the swash plate type compressor according to the present invention is provided with a holding portion 21 for holding the guide shoe 9 similarly to the conventional compressor. The holding portion 21 includes two holding sharing members 22 of the same shape which are connected to each other so as to be opposed to each other.
This is equivalent to the portion where the zero holding surface 11 is formed, and the holding of the guide shoes 9 is mutually shared.

The holding / sharing member 22 is configured as shown in FIG. As shown, the holding and sharing member 22 is
It is composed of a flat base 23 having an end formed in a wedge shape, and a positioning shape portion 24 protruding from the base 23. Since the holding and sharing member 22 can be formed separately from the piston 20, the holding and sharing member 22 is superior in abrasion resistance to zinc plating applied to the conventional holding portion 10, for example, JIS material code A4032 high silicon. It is formed of a wear-resistant aluminum material.

The wedge shape at the end of the base portion 23 is shaped to fit into a groove formed in the holding portion 21 of the piston 20, which will be described later. The reference surface 25 serves as a reference for positioning in the portion 21.

The base 23 has a conventional holding surface 11.
A holding surface 26 having the same shape as that of FIG. Holding surface 26
Is formed in a curved shape in accordance with the surface shape of the guide shoe 9, and is located at the same position as the conventional holding surface 11 when the base portion 23 is fixed to the holding portion 21.

The positioning shape portion 24 is formed so as to project in a direction perpendicular to the surface of the base portion 23 on which the holding surface 26 is formed. As shown in FIG.
The distal end of the fourth holding member 4 is formed in an L-shape so as to match with the positioning shape portion 24 of the same holding / sharing member 22 facing each other so that mutual positioning can be performed. By this positioning, the distance between the holding surfaces 26 is reduced to the conventional holding surface 1.
It is designed to match the interval between the two.

On the other hand, as shown in FIGS. 1 and 2, the holding portion 21 of the piston 20 is provided with a mounting reference surface 27 for mounting the holding / sharing member 22. Further, the holding portion 21 is formed with a body portion 28 projecting from the mounting reference surface 27 in a direction perpendicular to the holding reference surface 27 and holding the respective holding / sharing members 22. The body portion 28 has an end portion of the base portion 23. A wedge-shaped groove 29 is formed at right angles to the mounting reference surface 27. The mounting reference surface 27 and the groove 29
The base 23 of the holding / sharing member 22 is fitted into the groove 29 and abuts against the mounting reference surface 27 so that the center of the holding surface 26 coincides with the center axis of the piston 20 similarly to the conventional piston. Has become. That is, the mounting reference plane 2
The groove 7 and the groove 29 serve as the holding reference surfaces that are the appropriate positions of the reference surface 25 based on the positions where the guide shoes 9 are to be held.

With such a configuration, the piston of the swash plate type compressor of the present invention can be assembled as follows.

A plurality of holding / sharing members 22 are formed in advance. Then, the two holding / sharing members 22 are opposed to each other as shown in FIG.
And the so-called brazing process is applied to the joint portion to fix the respective holding / sharing members 22.

Next, the holding and sharing member 22 thus fixedly connected is assembled into the body 28 of the piston 20. The reference surfaces 25 of the respective bases 23 are fitted into the grooves 29 and are brought into contact with the mounting reference surfaces 27. At this time, since a slight gap is formed between the reference surface 25 and the groove 29, for example, a thermosetting resin, which is conventionally referred to as leptite, is injected into this gap to securely hold the respective holding / sharing members 22. The part 28 is fixed.

Thus, the holding portion 21 having the holding surface 26 for holding the guide shoe 9 is formed on the piston 20 in the same manner as the holding portion 10 of the conventional piston 8.

Accordingly, since the processing for forming the holding surface 26 may be performed by forming one holding surface 26 for one holding sharing member 22, the processing for forming the holding surface 11 of the conventional piston 8 is performed. It is not necessary to perform such processing that requires a long positioning time of the cutting tool 12 as described above, and the processing productivity is extremely improved.

The holding / sharing member 22 includes a piston 20
Since the holding surface 26 can be formed separately from the material, the holding surface 26 can be formed of a material having higher wear resistance than the conventional holding portion 10, and the wear resistance can be improved. Noise and vibration are less likely to occur than in the compressor described above, and durability can be improved.

Further, since it is not necessary to consider the wear resistance due to sliding of the guide shoe 9 for the body of the piston 20, an inexpensive aluminum die-cast material having a lower wear resistance than conventional materials should be used. In other words, it is possible to use a material that is easy to process, so that in addition to the above, the processing productivity is improved and the manufacturing cost can be reduced.

The material of the holding / sharing member 22 is J
The material symbol A4032 of high-silicon wear-resistant aluminum material of IS has been exemplified, but the material is not limited to this. Of course, things are fine. Further, the present invention is not limited to the swash plate type compressor having a variable capacity capable of changing the inclination angle of the swash plate with respect to the drive shaft as described above, but can be applied to a compressor having a fixed capacity.

[0031]

As is apparent from the above description, in the swash plate type compressor of the present invention, the processing for forming the holding surface is performed by forming one holding surface for one holding sharing member. Therefore, it is not necessary to perform a process that requires a long positioning time of the cutting tool, such as a process of forming a holding surface of a conventional piston, and the processing productivity is significantly improved.

Further, since the holding and sharing member can be formed separately from the piston, the holding surface can be formed of a material having higher wear resistance than before, and the wear resistance can be improved. As a result, noise and vibration are less likely to occur than in the conventional compressor, and the durability can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a piston of a swash plate type compressor according to the present invention.

FIG. 2 is a side view of a piston of the swash plate type compressor according to the present invention.

FIG. 3 is an external view of a holding / sharing member incorporated in the piston of FIG. 1;

FIG. 4 is a state diagram when a holding / sharing member is incorporated into a piston.

FIG. 5 is a sectional view of a conventional swash plate type compressor.

FIG. 6 is a view showing a processing state of a conventional piston.

[Explanation of symbols]

 9 Guide Shoe 21 Holding Part 22 Holding Sharing Member 24 Positioning Shape Part 25 Reference Surface 26 Holding Surface 27, 29 Holding Reference Surface

Claims (1)

[Claims] A swash plate (6) that is rotatable with respect to the drive shaft (3) is attached to a drive shaft (3) for inputting a rotational force, and is attached to a center axis of the drive shaft (3). A swash plate (6) is attached to a piston (8) slidably mounted in the center axis direction inside the cylinder (7) in parallel with a cylinder (7).
A guide shoe (9) which is disposed opposite to the front and back to convert the swing of the swash plate (6) into a reciprocating motion of the piston (8) and transmit it while the surface of the swash plate (6) slides. A swash plate compressor provided with holding portions (10, 21) for slidably holding the guide shoe (9, 21).
(26) are formed respectively, and a plurality of holding / sharing members (22) for mutually holding the guide shoe (9) are formed with positioning shapes (24) for positioning each other, and at least one A reference surface (25) serving as a reference for positioning in the holding portion (21) is formed on the two holding / sharing members (22), and the reference surface is based on a position where the guide shoe (9) is to be held.
Hold the holding reference plane (27, 29) at the proper position of (25)
(21), and the reference surface (25) is connected to the holding reference surface (27, 2).
9) The holding sharing member (22) is aligned with the holding portion (21).
A swash plate type compressor fixed to a swash plate.