KR101090569B1 - Assembling method of swash plate and rotating shaft for compressor - Google Patents

Abstract

The present invention relates to a swash plate and a rotating shaft assembly method of the compressor. The present invention comprises the steps of forming the uneven portion 141 ′ on the surface of the assembly portion 141 of the rotary shaft 140 of the compressor 100, and heating the swash plate 142 to assemble the holes 144 ′ of the swash plate 142. Including the step of expanding the inner diameter of the, and inserting the rotary shaft 140 into the assembly hole (144 ') so that the assembly portion 141 of the rotary shaft 140 is pressed into the assembly hole (144'). It is composed. According to the present invention, since the uneven portion 141 'is formed on the outer surface of the rotary shaft 140 constituting the compressor 100 can be firmly assembled to the swash plate 142, the swash plate 142 and the rotary shaft 140 Torque tightening force between) is improved, and thus, the swash plate 142 and the rotating shaft 140 are prevented from running during the operation of the compressor 100, and thus, the performance of the compressor 100 is improved.

Compressor, swash plate, rotating shaft, irregularities

Description

Assembling method of swash plate and rotating shaft for compressor

The present invention relates to a compressor, and more particularly to a swash plate constituting a swash plate type compressor and a method of assembling a rotating shaft for rotating the same.

In general, the compressor used in the air conditioning system of the automobile sucks the working fluid from the evaporator to the high temperature and high pressure which is easy to liquefy, and delivers it to the condenser.

In such a compressor, a configuration for compressing a working fluid includes a reciprocating type that performs compression while reciprocating and a rotary type that performs compression while rotating. The reciprocating type includes a crank type for transmitting a driving force of a driving source using a crank shaft, a swash plate for transferring a rotating shaft provided with a swash plate, and a wobble plate type using a wobble plate. Rotary type includes vane rotary type using rotary rotary shaft and vane, and scroll type using rotary scroll and fixed scroll.

1 and 2 disclose a configuration of a general swash plate compressor. A schematic configuration of a swash plate compressor will be described with reference to the drawings. The front housing 10, the rear housing 20, and the front and rear cylinder blocks 30 and 30 ′ form the skeleton and the appearance of the compressor 1. A rotating shaft 40 is installed through the center of the front housing 10 and the front and rear cylinder blocks 30 and 30 ', and the rotating shaft 40 is rotated by an external driving force. The front housing 10 and the rear housing 20 are coupled to the outside of the front and rear cylinder blocks 30 and 30 ', respectively.

The piston 50, which linearly reciprocates by the rotation of the rotary shaft 40, is installed in the cylinder bore 35 of the front and rear cylinder blocks 30, 30 ', and compresses the working fluid compressed by the cylinder bore 35. A valve unit 60 for controlling discharge is installed between the front housing 10 and the front cylinder block 30 and between the rear housing 20 and the rear cylinder block 30 '. The front housing 10, the rear housing 20, the front and rear cylinder blocks (30, 30 ') are fastened to each other by a fixing bolt 70, the fixing bolt 70 is the front housing 10, the rear housing 20, penetrates the front and rear cylinder blocks 30 and 30 '. To this end, the bolt holes 10 'and 20' are formed in the front housing 10 and the rear housing 20.

Now, the detailed configuration of each component described above will be described. First, the front housing 10 has a cylindrical hole 12 through which the rotating shaft 40 passes through the center in a substantially disk shape. The shaft hole 12 penetrates the center of the boss portion 13 protruding from the center of one surface of the front housing 10. The discharge chamber 14 is recessed on the opposite surface on which the boss portion 13 of the front housing 10 is formed. The discharge chamber 14 is formed over a substantially ring-shaped region, and selectively communicates with each cylinder bore 35 of the front cylinder block 30 through the valve unit 60.

The rear housing 20 is mounted on one surface of the rear cylinder block 30 '. The discharge chamber 22 is formed on the surface of the rear housing 20 facing the rear cylinder block 30 '. The discharge chamber 22 is selectively formed to communicate with the cylinder bores 35 formed in the rear cylinder block 30 'through the valve unit 60.

 The front and rear cylinder blocks 30 and 30 'are recessed portions formed on surfaces coupled to each other to form the swash plate chamber 31. In the swash plate chamber 31, a swash plate 42 installed on the rotating shaft 40 is rotatably positioned. The shaft support hole 32 is formed through the front and rear cylinder blocks 30 and 30 '. The rotary shaft 40 penetrates the shaft support hole 32.

A plurality of cylindrical cylinder bores 35 are formed in the front and rear cylinder blocks 30 and 30 'in the direction of forming the shaft support hole 32 with the shaft support hole 32 as the center. Of course, the cylinder bores 35 are formed at positions corresponding to the front and rear cylinder blocks 30 and 30 ', respectively.

The cylinder bore 35 and the shaft support hole 32 communicate with each other through the suction passage 36, respectively. The suction passage 36 allows the working fluid delivered through the inside of the rotating shaft 40 to be delivered to the cylinder bore 35, respectively.

Discharge passages 38 are formed in the front and rear cylinder blocks 30 and 30 ′ so as to communicate with the discharge chambers 14 and 22 of the front and rear housings 10 and 20, respectively. The discharge passage 38 serves as a passage for discharging the working fluid compressed in the cylinder bore 35 to the outside.

The rotary shaft 40 has one end penetrating the front housing 10 and an intermediate part penetrating the front and rear cylinder blocks 30 and 30 '. An approximately disk-shaped swash plate 42 is inclined with respect to the extending direction of the rotating shaft 40 on the rotating shaft 40.

The center of the swash plate 42 is provided with a hub 44 having a cylindrical shape, the rotation shaft 40 penetrates through the hub 44. A communication hole 44 ′ is drilled through the hub 44 so as to communicate with the inside of the rotation shaft 40.

At this time, the rotary shaft 40 is pressed into the assembly hole 44 ″ formed in the swash plate 42 to assemble the rotary shaft 40 and the swash plate 42. More specifically, the rotary shaft 40 is inserted into the assembly hole 44 '' in a state where the swash plate 42 is heated to expand the inner diameter of the assembly hole 44 '', and then cooled and rotates the rotary shaft ( 40 is manufactured to be firmly fixed to the assembling hole 44 ''.

Then, a plurality of shoes 45 surrounding the edge of the swash plate 42 is installed. The shoe 45 is configured to move along the edge of the swash plate 42. Bearings 46 are provided between both ends of the swash plate 42 and the cylinder blocks 30 and 30 ', respectively.

The flow path 47 through which the working fluid flows is formed in the rotary shaft 40. The flow passage 47 is formed long in the longitudinal direction of the rotation shaft 40 inside the rotation shaft 40. An inlet 48 and an outlet 48 ′ are formed on the outer surface of the rotation shaft 40. The inlet 48 communicates the swash plate chamber 31 and the flow passage 47, and the outlet 48 ′ communicates with the suction passage 36 of the front and rear cylinder blocks 30 and 30 ′. Formed in position. The position of the outlet 48 ′ should be formed in accordance with the compression order of the working fluid proceeding in each cylinder bore 35. Reference numeral 49 is a shaft sealing portion that prevents the gap between the inner surface of the shaft hole 12 of the front housing 10 and the outer surface of the rotary shaft 40.

Piston 50 is to linearly reciprocate the inside of the cylinder bore (35). The piston 50 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 35, and both ends thereof are positioned at the cylinder bores 35 of the front and rear cylinder blocks 30 and 30 ', respectively. That is, both ends of each of the one piston 50 serves to compress the working fluid in the cylinder bore (35). The piston 50 is coupled to the middle of the shoe 45, the linear reciprocating motion in accordance with the rotation of the swash plate 42.

The valve unit 60 is used to control the discharge of the working fluid compressed in the cylinder bore 35 to the outside of the cylinder bore 35. The valve unit 60 includes a valve plate 62 which is installed in close contact with one surface of the front and rear cylinder blocks 30 and 30 ', and the valve plate 62 corresponds to each cylinder bore 35. The discharge hole 64 is formed in the position. Discharge leads 66 are used to selectively open and close the discharge holes 64, respectively. The discharge lead 66 may be elastically deformed and elastically deformed according to the pressure of the working fluid in the cylinder bore 35 to open and close the discharge hole 64.

The valve plate 62 is formed in a substantially disk-shaped communication hole 67 at a position corresponding to the discharge passage 38. The communicating hole 67 serves to communicate the respective discharge chambers 14 and 22 with the discharge passage 38.

A muffler 68 is formed on the outer surface of the front and rear cylinder blocks 30 and 30 'so as to communicate with the discharge passage 38. The muffler 68 serves to reduce pulsation and noise of the working fluid. The muffler 68 is formed with a discharge port 69 for discharging the working fluid to the outside (condenser) of the compressor (1). For reference, a suction port (not shown) for transmitting a working fluid into the swash plate chamber 31 of the compressor 1 is formed at one side of the front and rear cylinder blocks 30 and 30 '. Reference numerals 16 and 18 denote oil chambers and communication paths, respectively.

The operation of the general compressor 1 having such a configuration will be described. As the rotary shaft 40 rotates by a driving force transmitted from the outside, the swash plate 42 is rotated with the rotation of the rotary shaft 40. Rotation of the swash plate 42 allows the piston 50 to make a straight reciprocating motion inside the cylinder bore 35.

At this time, as the rotary shaft 40 rotates, the flow passage 47 inside the rotary shaft 40 communicates with the cylinder bore 35 through the outlet 48 'and the suction passage 36. The communication between the flow passage 47 and the cylinder bore 35 allows the working fluid sucked into the swash plate chamber 31 to be transferred to the cylinder bore 35. For reference, the working fluid is sucked into the cylinder bore 35 when the piston 50 is located at the bottom dead center of the corresponding cylinder bore 35.

When the working fluid is transferred to the cylinder bore 35, and the piston 50 of the corresponding cylinder bore 35 moves in the direction of the valve plate 62, compression of the working fluid occurs. When the working fluid is compressed in the cylinder bore 35, the pressure inside the cylinder bore 35 becomes relatively high, and the tip of the discharge lead 66 is pushed and elastically deformed to open the discharge hole 64. do.

In this case, the working fluid compressed through the discharge hole 64 is transferred to the discharge chambers 14 and 22, and the working fluid delivered to the discharge chambers 14 and 22 is communicated through the communication hole 67. The seawater is delivered to the muffler 68 via the discharge passage 38, and is transferred from the muffler 68 to the condenser through the discharge port 69.

However, the conventional compressor as described above has the following problems.

The assembly between the swash plate 42 and the rotary shaft 40 is made by inserting the rotary shaft 40 into the assembly hole 44 '' of the swash plate 42, as described above, wherein the swash plate 42 and the rotary shaft 40 In general, the outer diameter of the rotating shaft 40 is formed to be at least 90 μm larger than the inner diameter of the assembly hole 44 ″ of the swash plate 42 for a solid assembly.

Accordingly, in the process of inserting the rotary shaft 40 into the assembly hole 44 ″ of the swash plate 42, there is a problem in that the swash plate 42 is damaged when a burr is generated or is severe. This is generally because the swash plate 42 is a relatively light and low strength material, such as aluminum, the rotation shaft 40 may be more easily generated because the steel shaft is made of a relatively high strength steel.

Of course, to solve this, as described above, the size difference between the outer diameter of the rotating shaft 40 and the inner diameter of the assembly hole 44 ″ of the swash plate 42 may be reduced, but in this case, the swash plate 42 and the rotating shaft 40 There is a possibility that the firm coupling between the) is not made, the swash plate 42 and the rotating shaft 40 in the process of operation of the compressor will be lost.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, to prevent the occurrence of burrs in the assembly process of the swash plate and the rotating shaft for the compressor and to ensure that the swash plate and the rotating shaft is firmly coupled.

According to a feature of the present invention for achieving the above object, the present invention is to assemble a swash plate rotatably installed in the swash plate chamber of the cylinder block, and the rotating shaft coupled to the swash plate to transmit the rotational force to the swash plate In the method of assembling the swash plate and the rotating shaft of the compressor for forming a concave-convex portion on the surface of the assembly portion of the rotating shaft, heating the swash plate to enlarge the inner diameter of the assembling hole of the swash plate, and inserting the rotating shaft into the assembly hole It comprises a step of allowing the assembly portion of the rotary shaft is pressed into the assembly hole.

The uneven portion is molded so that its arithmetic mean roughness is 0.3 μm to 2 μm.

The outer diameter of the assembly portion of the rotary shaft is formed 60μm to 80μm larger than the inner diameter of the assembling hole of the swash plate.

The uneven portion formed in the assembly portion is formed by dot marking, sandpaper processing or laser processing.

According to the method for assembling the swash plate and the rotating shaft for a compressor according to the present invention, the following effects can be expected.

In the present invention, since the uneven portion is formed on the outer surface of the rotating shaft constituting the compressor can be firmly assembled to the swash plate, the torque tightening force between the swash plate and the rotating shaft is improved. Accordingly, since the swash plate and the rotating shaft are prevented from running during the operation of the compressor, an effect of improving the performance of the compressor can be expected.

Particularly, in the present invention, since the difference between the outer diameter of the rotating shaft and the inner diameter of the assembling hole of the swash plate is reduced as compared with the conventional uneven portion formed on the rotating shaft, burrs or damage to the swash plate are prevented in the process of assembling the rotating shaft to the swash plate. It also works.

3 is a cross-sectional view showing the configuration of a swash plate compressor employing a preferred embodiment of the method for assembling the swash plate and the rotating shaft of the compressor according to the present invention, Figure 4 is a configuration of the rotating shaft constituting an embodiment of the present invention in a plan view It is.

As shown in these figures, the front housing 110, the rear housing 120, and the front and rear cylinder blocks 130, 130 'form the skeleton and appearance of the compressor 100. Of course, the skeleton and appearance of the compressor 100 are formed by the front housing 110 and the rear housing 120, the cylinder block (130, 130 ') may be provided in the interior space of the front and rear housing (110, 120).

These are arranged and coupled in the order of the front housing 110, the front and rear cylinder blocks (130, 130 ') and the rear housing 120, the rotation shaft 140 is installed through the center of each of which is rotated by an external drive source.

Piston 158 linearly reciprocating in conjunction with the rotation of the rotary shaft 140 is installed in the cylinder bore 135 of the front and rear cylinder blocks (130, 130 '), the discharge of the working fluid compressed in the cylinder bore (135) It is made by the valve unit 160.

The front and rear housings 110 and 120, and the front and rear cylinder blocks 130 and 130 ′ are fastened to each other by a plurality of fixing bolts 170 penetrating them. For this purpose, the front and rear housings 110 and 120 are bolted holes 110 ′ and 120 ′. ) Is formed.

Hereinafter, the components constituting the compressor 100 will be described in more detail. The front housing 110 is formed in a shaft through-hole 112 through which the rotating shaft 140 passes through the center in a substantially disk shape. The shaft hole 112 is formed through the center of the boss portion 113 protruding in the center of one surface of the front housing 110.

The discharge chamber 114 is formed in the front housing 110 on the opposite surface on which the boss portion 113 is formed. The discharge chamber 114 may be formed over a substantially ring-shaped region so as to selectively communicate with each cylinder bore 135 of the front cylinder block 130 and the valve unit 160.

The rear housing 120 is mounted on one surface of the rear cylinder block 130 ′, ie, the opposite surface 132 of the rear cylinder block 130 ′ in close contact with the front cylinder block 130. The discharge chamber 122 is recessed on a surface of the rear housing 120 that faces the rear cylinder block 130 ′.

A rotation shaft chamber 124 corresponding to one end of the rotation shaft 140 is formed at the center of the rear housing 120. The rotary shaft chamber 124 is formed by partitioning the discharge chamber 122 in the center of the discharge chamber 122.

The front and rear cylinder blocks 130 and 130 ′ are formed to correspond to portions concaved to the surfaces joined to each other to form the swash plate chamber S. The swash plate 142 installed on the rotating shaft 140 is rotatably positioned in the swash plate chamber (S). A suction port (not shown) is formed at a position corresponding to the swash plate chamber S among the outer surfaces of the front and rear cylinder blocks 130 and 130 ′ to transmit a working fluid transferred from the evaporator to the inside of the swash plate chamber S.

Axial support holes 131 are formed in the front and rear cylinder blocks 130 and 130 '. The shaft support hole 131 is a portion into which the rotation shaft 140 is inserted, and has an inner diameter corresponding to the diameter of the rotation shaft 140.

The front and rear cylinder blocks 130 and 130 ′ are formed by passing through a plurality of cylindrical cylinder bores 135 in the direction of forming the mounting hole with the shaft support hole 131 at the center. In this case, the cylinder bore 135 is formed at positions corresponding to the front and rear cylinder blocks 130 and 130 ', respectively.

Suction passages 136 are formed in the front and rear cylinder blocks 130 and 130 '. The suction passage 136 communicates between the cylinder bore 135 and the shaft support hole 131 so that the working fluid is transferred to the cylinder bore 135 through the interior of the rotating shaft 140.

Discharge passages 138 are formed in the front and rear cylinder blocks 130 and 130 ′ so as to communicate with discharge chambers 114 and 122 of the front and rear housings 110 and 120, respectively. The discharge passage 138 serves as a passage for discharging the working fluid compressed in the cylinder bore 135 to the outside.

One end of the rotating shaft 140 passes through the front housing 110, and the other end of the rotating shaft 140 faces the rotating shaft chamber 124 of the rear housing 120. An approximately disk-shaped swash plate 142 is installed to be inclined with respect to the extending direction of the rotating shaft 140. The swash plate 142 is provided to be inclined with respect to the rotation shaft 140, and serves to linearly move the piston 158 during the rotation process.

More specifically, the outer surface of the rotary shaft 140 is provided with an assembly portion 141, the swash plate 142 is formed with a corresponding assembly hole (144 '), the rotary shaft 140 is the swash plate 142 Is assembled on.

At this time, the uneven portion 141 ′ is provided on the surface of the assembly portion 141 of the rotating shaft 140. The uneven portion 141 ′ is formed by roughening the surface of the assembling portion 141. As shown in FIG. 4, the uneven portions 141 ′ are formed by alternately protruding portions and indented portions. Reference numeral P denotes a protrusion constituting the uneven portion 141 '.

The uneven portion 141 'is to allow the assembly between the assembly portion 141 of the rotary shaft 140 and the assembly hole 144' of the swash plate 142 to be firmly assembled, dot marking or sandpaper processing or laser processing It can be formed through.

Arithmetic mean deviation of the profile (Ra) of the uneven portion (141 ') is preferably 0.3 ~ 2μm. If the arithmetic mean roughness of the uneven portion 141 'is less than or equal to 0.3μm, the coupling force between the rotating shaft 140 and the swash plate 142 becomes small, and if more than 2μm, the uneven portion 141' is easily assembled during the assembling process. It can be damaged.

In the table below, the test values of the swash plate 142 and the rotating shaft 140 assembly according to the present invention are disclosed in comparison with the prior art.

Processing method of uneven part
Conventional contrast
Diameter difference reduction

Conventional contrast
Torque tightening force increase
Burr occurrence

Dot marking

30%
12%
Does not occur
Sandpaper processing

30%
2%
Does not occur
Laser processing

30%
12%
Does not occur

For reference, the diameter difference refers to the size difference between the outer diameter of the concave-convex portion 141 'and the inner diameter of the assembly hole 144' of the swash plate 142, the torque tightening force is the rotational shaft 140 and the swash plate 142 It means a rotational force necessary to, and whether the burr generation means whether or not the burr is generated in the process of pressing the rotary shaft 140 in the swash plate 142.

As shown in the present invention, in the present invention, compared with the conventional method, in all processing methods of the uneven parts 141 ', the difference between the outer diameter of the uneven parts 141' and the inner diameter of the assembling hole 144 'of the swash plate 142 is different. Despite the decrease, it can be seen that the torque tightening force between the swash plate 142 and the rotating shaft 140 has increased due to the uneven portion 141 '.

Due to the reduced diameter difference, it can be seen that no burr was generated at all in the process of pressing the rotary shaft 140.

At this time, the outer diameter of the concave-convex portion 141 ′ is preferably 60 μm to 80 μm larger than the inner diameter of the assembly hole 144 ′ of the swash plate 142. If the size difference between the outer diameter of the concave-convex portion 141 'and the inner diameter of the assembly hole 144' is less than 60μm, despite the presence of the concave-convex portion 141 ', it is difficult to make a strong coupling between the two, If it is 80 μm or more, the bonding force for joining the two becomes too large, resulting in poor assembly.

Next, the compressor 100 will be continuously described, and the assembling hole 144 'is drilled through the hub 144 so as to communicate with the inside of the rotating shaft 140, and surrounds the edge of the swash plate 142. The plurality of shoes 145 are installed. The shoe 145 is configured to move along the surface edge of the swash plate 142.

The flow passage 147 through which the working fluid flows is formed inside the rotating shaft 140. The flow path 147 is formed long in the longitudinal direction of the rotation shaft 140 inside the rotation shaft 140. The flow path 147 is formed to be opened to one end of the rotation shaft 140, and the opened portion is positioned to face the rotation shaft chamber 124 of the rear housing 120.

In order to communicate with the flow path 147, the swash plate chamber S, and the suction passage 136, the inlet 148 and the outlet 148 are respectively opened in the rotation shaft 140 to the outer surface of the rotation shaft 140. ') Is formed. The inlet 148 and the outlet 148 ′ may each be formed in plurality. Reference numeral 149 denotes a shaft sealing part that prevents a gap between the inner surface of the shaft through hole 112 of the front housing 110 and the outer surface of the rotating shaft 140.

The piston 158 is a linear reciprocating motion in the cylinder bore (135). The piston 158 has a substantially cylindrical shape corresponding to the inside of the cylinder bore 135, and both ends thereof are positioned at the cylinder bores 135 of the front and rear cylinder blocks 130 and 130 ', respectively. That is, both ends of the one piston 158 serves to compress the working fluid in the cylinder bore 135.

The valve unit 160 is used to control the discharge of the working fluid compressed in the cylinder bore 135 to the outside of the cylinder bore 135. The valve unit 160 includes a valve plate 162 installed in close contact with one surface of the front and rear cylinder blocks 130 and 130 ′, and the valve plate 162 is positioned at a position corresponding to each cylinder bore 135. The discharge hole 164 is formed. Discharge leads 166 are used to selectively open and close the discharge holes 164, respectively. The discharge lead 166 may be elastically deformable and may be elastically deformed according to the pressure of the working fluid in the cylinder bore 135 to open the discharge hole 164.

The valve plate 162 is formed in a substantially disk shape, the communication hole 167 is formed in a position corresponding to the discharge passage 138. The communication hole 167 serves to communicate the respective discharge chambers 114 and 122 with the discharge passage 138.

A muffler 168 is formed on outer surfaces of the front and rear cylinder blocks 130 and 130 ′ so as to communicate with the discharge passage 138. The muffler 168 serves to reduce pulsation and noise of the working fluid. The muffler 168 is provided with a discharge port 169 for discharging the working fluid to the outside (condenser) of the compressor (100). Reference numerals 116 and 118 denote oil chambers and communication paths, respectively.

Hereinafter, the assembly process of the swash plate and the rotating shaft for a compressor according to the present invention will be described in detail with reference to the drawings.

5 (a) and 5 (b) is shown a cross-sectional state of the process of assembling the swash plate and the rotating shaft of the compressor by the present invention, Figure 6 is a method of assembling the swash plate and the rotating shaft of the compressor according to the present invention It is shown in a flowchart.

According to this, first, the worker processes the assembled portion 141 of the manufactured rotating shaft 140 to form the uneven portion 141 '. (S100) The uneven portion 141' is a dot marking, sandpaper processing or laser processing. Or the like.

At this time, as described above, the arithmetic mean roughness Ra of the uneven parts 141 ′ is preferably molded to be 0.3 μm to 2 μm.

Next, the worker heats the swash plate 142, which is already manufactured separately, to enlarge the inner diameter of the assembly hole 144 'of the swash plate 142. (S110) This is the rotation shaft 140 than the inner diameter of the assembly hole 144'. Since the outer diameter of the assembly portion 141 of the large, in order to prevent the rotating shaft 140 to damage the periphery of the edge of the assembly hole (144 ') during the assembly process.

In this state, the rotary shaft 140 is inserted into the assembly hole 144 'of the swash plate 142. More precisely, the assembly portion of the rotary shaft 140 is inserted into the assembly hole 144' of the swash plate 142. It is to make 141 press-in, and burr does not occur in this process.

This is because the swash plate 142 is heated to increase the inner diameter of the assembly hole 144 ', and the outer diameter of the assembly portion 141 of the rotating shaft 140 and the inner diameter of the assembly hole 144' of the swash plate 142. This is because the size difference of is relatively small, from 60 µm to 80 µm.

Next, when the assembly composed of the rotating shaft 140 and the swash plate 142 is cooled, the assembly hole 144 'is contracted and tightly adhered to the outer surface of the uneven portion 141'. The cooling process can use natural cooling without a separate device.

5 (a) and 5 (b) schematically show how the assembly hole 144 'is contracted. As shown in the drawing, when the assembly hole 144 'of the swash plate 142 is contracted, the convex-concave portion 141' of the rotation shaft 140 digs the inner circumferential surface of the assembly hole 144 'to increase the fastening force between the two. .

This can be made more easily because the swash plate 142 is made of a relatively soft material compared to the rotating shaft 142, such as aluminum.

Next, the worker assembles the compressor 100 using the swash plate 142 and the rotating shaft 140 assembly assembled as described above.

In this case, since the torque tightening force is improved due to the presence of the uneven portion 141 ', the swash plate 142 and the rotating shaft 140 assembly may be prevented from running out of the swash plate 142 and the rotating shaft 140 more effectively. .

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

In the above embodiment, a fixed displacement swash plate type compressor in which the inclination angle of the swash plate 142 with respect to the rotating shaft 140 is fixed has been described as an example, but the present invention also includes a variable displacement swash plate type compressor in which the inclination angle of the swash plate can be adjusted. Can be applied.

1 is a cross-sectional view showing the configuration of a compressor according to the prior art.

Figure 2 is a perspective view showing the configuration of a rotating shaft constituting the compressor according to the prior art and the swash plate coupled thereto.

Figure 3 is a cross-sectional view showing the configuration of a swash plate compressor which is a preferred embodiment of the method for assembling the swash plate and the rotating shaft of the compressor according to the present invention.

4 is a plan view showing the configuration of a rotating shaft constituting an embodiment of the present invention.

5 (a) and 5 (b) is a cross-sectional view showing a process of assembling the swash plate and the rotating shaft of the compressor by the present invention.

Figure 6 is a flow chart sequentially showing the assembly method of the swash plate and the rotating shaft of the compressor according to the present invention.

Explanation of symbols on the main parts of the drawings

100: compressor 110: front housing

116: oil chamber 118: communication path

120: rear housing 122: discharge chamber

124: rotating shaft chamber 130: front cylinder block

130 ': rear cylinder block 131: shaft support hole

135: cylinder bore 140: rotation axis

141: assembly portion 141 ': uneven portion

142: Saphan 144: Hub

144 ': Assemblyman 147: Euro

160: valve unit 164: discharge hole

S: tribunal

Claims (4)

For assembling the swash plate 142 rotatably installed in the swash plate chamber (S) of the cylinder block 130 and the rotating shaft 140 coupled to the swash plate 142 to transfer the rotational force to the swash plate 142. In the swash plate and rotating shaft assembly method of the compressor, The outer diameter of the assembly portion 141 of the rotary shaft 140 is 60 μm to 80 μm larger than the inner diameter of the assembly hole 144 ′ of the swash plate 142, and an arithmetic mean is applied to the surface of the assembly portion 141 of the rotary shaft 140. Forming an uneven portion 141 'having a roughness Ra of 0.3 μm to 2 μm, Heating the swash plate 142 to enlarge an inner diameter of the assembly hole 144 'of the swash plate 142; And inserting the rotating shaft 140 into the assembly hole 144 'such that the assembly part 141 of the rotating shaft 140 is press-fitted into the assembly hole 144'. Assembly method of rotating shaft. delete delete The method according to claim 1, wherein the uneven portion (141 ') formed in the assembling portion (141) is formed by dot marking, sandpaper processing, or laser processing.

Images