JP2013007354A - Air compressor - Google Patents

Abstract

An object of the present invention is to provide an air compressor that suppresses vibrations of a pipe to suppress breakage of a fixing portion and the like and improves cooling performance of compressed air in the pipe.
A compressed air generation unit that is driven by an output unit to compress air, an air tank that stores compressed air generated by the compressed air generation unit, an air tank, and a compressed air generation unit. A pipe 21B that is connected to the compressed air generating unit 4 at one end and connected to the air tank 2 at the other end and sends compressed air from the compressed air generating unit 4 to the air tank 2; The compressed air generator 4 is provided with an air compressor 1 in which a fixture 7 that holds the pipe 21B is attached between one end and the other end.
[Selection] Figure 2

Description

  The present invention relates to an air compressor for supplying compressed air to a tool or the like that uses compressed air as a power source.

  In construction sites and the like, air tools for driving nails and screws into wood with pressure of compressed air are widely used, and air compressors are used to generate compressed air supplied to the air tools. In an air compressor, a piston in a cylinder provided in a crankcase is driven by a motor or the like to compress air and the compressed air is stored in a tank via a pipe, and compressed air is supplied from this tank to an air tool. Supply. The pipe is made of a good heat conductor such as copper, and cools the compressed air fed through the pipe in order to improve the filling efficiency of the compressed air in the tank. In order to increase the pressure of compressed air, for example, as shown in Patent Document 1, a multistage reciprocating compressor that performs compression stepwise with a plurality of pistons is known.

JP 2009-185648 A

  As the piston reciprocates, vibration is generated in the crankcase and the cylinder. This vibration is also transmitted to the above-mentioned pipe interposed between the cylinder and the tank. However, when the vibration is transmitted to the pipe, there is a case where the fixing portion for fixing the tank or the cylinder pipe is loosened or damaged. . By shortening the pipe, it is possible to suppress the breakage of the fixed portion, but the convenience of handling and the cooling efficiency of the compressed air in the pipe are lowered, so the pipe cannot be easily shortened. Therefore, an object of the present invention is to provide an air compressor that suppresses the vibration of the pipe to suppress the breakage of the fixed portion and the like and improves the cooling performance of the compressed air in the pipe.

  In order to solve the above-described problems, the present invention provides a compressed air generating unit that is driven by a driving unit that outputs a rotational force to compress air, an air tank that stores compressed air generated by the compressed air generating unit, It is interposed between the compressed air generating section and the air tank, and is connected to the compressed air generating section at one end and connected to the air tank at the other end to compress the compressed air from the compressed air generating section to the air tank. And an air compressor in which a fixture for holding the pipe is attached to the compressed air generation unit via an elastic body.

  According to such a configuration, the maximum amplitude position of the pipe is fixed so as not to vibrate, so that the pipe amplitude can be reduced. By reducing the amplitude, the load generated at the connection location between the air tank of the pipe and the compressed air generating section is reduced, and breakage of the connection location can be prevented.

  In the air compressor configured as described above, the fixture preferably includes a good heat conductor and has heat dissipation fins.

  According to such a configuration, since the pipe can be further cooled by the fixture, the cooling performance of the compressed air by the pipe can be improved, and the charging efficiency of the compressed air into the air tank can be improved.

  Moreover, it is preferable to further have a blower fan that blows cooling air that cools the compressed air generating unit, and the heat dissipating fins are disposed at a position in contact with the cooling air.

  According to such a configuration, the cooling performance of the pipe by the fixture can be further improved.

  In addition, the fixing device has a base portion attached to the compressed air generating portion and a holding portion held by the base portion via an elastic body, and the pipe is provided between the base portion and the holding portion. It is preferable to be sandwiched and held between.

  According to such a configuration, since the pipe is elastically held, the pipe can be easily held without being crushed.

  Further, in the fixing tool, it is preferable that the portion holding the pipe is shaped so as to coincide with the outer shape of the portion held by the fixing tool in the pipe.

  According to such a configuration, the pipe can be stably held. Further, since the contact area between the fixture and the pipe is increased, the cooling efficiency of the pipe can be increased by configuring the base portion and the holding portion with a good heat conductor.

  According to the air compressor of the present invention, the vibration of the pipe can be suppressed to prevent damage to the fixed portion of the pipe, and the cooling performance of the compressed air in the pipe can be improved.

The front perspective view of the air compressor concerning an embodiment of the invention. The front perspective view in the state where the cover of the air compressor concerning an embodiment of the invention was removed. The front view in the state where the cover of the air compressor concerning an embodiment of the invention was removed. Sectional drawing along the IV-IV line of FIG. FIG. 4 is a partial cross-sectional view taken along line VV in FIG. 3. The fragmentary sectional view which concerns on the modification of the fixing tool of the air compressor which concerns on embodiment of this invention.

  Hereinafter, an air compressor according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. An air compressor 1 shown in FIG. 1 is a portable air compressor that supplies compressed air to a tool such as a nailing machine powered by compressed air. As shown in FIG. The drive unit 3, the compressed air generation unit 4, and the control circuit unit 8 are mainly configured. The drive unit 3, the compressed air generation unit 4, and the control circuit unit 8 are housings as shown in FIG. Covered with 1A.

  As shown in FIG. 2, the tank unit 2 is mainly composed of two tanks 21 and 22, and stores the compressed air supplied from the compressed air generating unit 4 at a maximum pressure of about 4.2 MPa. Yes. The two tanks 21 and 22 have the same shape and have a substantially cylindrical shape closed at both ends, and are arranged in parallel so that the axial centers of the cylinders are parallel to each other. The ends are connected to each other by a frame 23 (FIG. 3), and the inside communicates with a connecting pipe (not shown). In the following description, the axial direction of the cylinder is the front-rear direction of the air compressor 1, and the direction perpendicular to the front-rear direction and the two tanks 21, 22 are aligned is the left-right direction. Further, the front-rear direction and the direction orthogonal to the left-right direction are defined as the up-down direction. The tank part 2 is located in the lowest part of the air compressor 1 in the up-down direction.

  Anti-vibration supporting rubber feet 21A and 22A, which serve as mounting portions in the air compressor 1, are provided at the front and rear end positions of the two tanks 21 and 22, respectively. Handles 23A and 23A extend upward from the frame 23 located at one end and the other end (front end and rear end), respectively.

  In the tank unit 2, the tank 21 is provided with couplers 24A and 24B which are compressed air outlets corresponding to the high-pressure side and the low-pressure side. A tool driven by using the compressed air as power is connected. Pressure reducing valves 25A and 25B are provided on the tank 21 side of the couplers 24A and 24B, respectively. The pressure of the compressed air discharged from the couplers 24A and 24B is reduced to the maximum pressure or less by the pressure reducing valves 25A and 25B. In the vicinity of the couplers 24A and 24B, a pressure gauge 26 is provided to monitor the pressure of the compressed air discharged. Further, a pipe 21B connected to a later-described high-pressure side piston portion 6B to which compressed air is supplied is connected to the tank 21 via a fixed portion 21C. The pipe 21B is made of copper, which is a good heat conductor, and has one end extending from a high-pressure side piston portion 6B described later and passing through the vicinity of a later-described crankcase 41 and the fan 42 described later to the tank 21 at the other end. It is connected. The pipe 21B is configured such that a portion that is most likely to vibrate between one end and the other end, that is, a portion where the amplitude is the largest at the time of vibration is located above the crankcase 41 described later and in the vicinity of the fan 42 described later. Yes. The tanks 21 and 22 are provided with a safety valve (not shown) for discharging compressed air into the atmosphere when the internal pressure becomes abnormally high.

  The drive unit 3 is composed of a DC motor mounted on the tank unit 2 and includes a stator 31, a rotor 32, and an output shaft unit 33 that rotates integrally with the rotor 32 as shown in FIG. 4. The axial direction of the output shaft portion 33 coincides with the front-rear direction, and the output shaft portion 33 is disposed on the tank portion 2 so as to protrude forward and at a substantially central position in the front-rear direction.

  The compressed air generating unit 4 includes a crankcase 41 made of metal such as aluminum that is mounted on the tank unit 2 and connected to the driving unit 3 as a frame, and includes a crank unit 5 that is mainly a crank unit, and a piston unit 6. And a fixture 7 is mounted. The crank portion 5 is disposed in a crank chamber 41a in the crankcase 41, and includes a crankshaft 51, and a first crank arm 52 and a second crank arm 53 that are mounted to rotate integrally with the crankshaft 51. A balance weight 54 is provided, and a first crank arm 52, a second crank arm 53, and a screw 55 for fixing the balance weight 54 together are provided.

  The crankshaft 51 is disposed so that its axial direction coincides with the front-rear direction and is connected to the output shaft portion 33 so as to rotate integrally therewith, and is rotatably supported by the crankcase 41 at a position near its front end. . The foremost end of the crankshaft 51 protrudes from the crankcase 41, and a fan 42 for sending cooling air to the crankcase 41, the drive unit 3, and the fixture 7 is mounted at the foremost end position so as to rotate coaxially and integrally. Yes. In the crankshaft 51, a groove (not shown) extending in the front-rear direction is formed at a position where the first crank arm 52, the second crank arm 53, and the balance weight 54 are mounted. A key 51A for rotating the crankshaft 51, the first crank arm 52, the second crank arm 53, and the balance weight 54 coaxially and integrally is inserted.

  The first crank arm 52 is a disc-shaped cam, and has a shaft center different from the shaft center of the disk at a position deviated from the shaft center of the disk, and is capable of inserting the crankshaft 51 and the key 51A. One through hole 52a is provided. The first crank arm 52 has a through hole (not shown) through which the screw 55 passes.

  The second crank arm 53 is a cam configured in the shape of a disk having the same diameter as the first crank arm 52 and is in a position in contact with the rear surface of the first crank arm 52 and in phase with the first crank arm 52. A second through hole 53a having the same shape as the first through hole 52a is formed at a position where the crankshaft 51 and the key 51A are inserted into the second through hole 53a. The second crank arm 53 is screwed with a screw 55 and has a screw hole (not shown) coaxial with a through hole (not shown) of the first crank arm 52.

  The balance weight 54 includes a mounting portion 54 </ b> A and a weight portion 54 </ b> B, and is mounted so as to contact the front surface of the first crank arm 52. The mounting portion 54A is formed with a hole 54a that has the same shape as the first through hole 52a and the second through hole 53a and into which the crankshaft 51 and the key 51A are inserted. Further, a through hole (not shown) coaxial with a screw hole (not shown) of the second crank arm 53 is formed in the mounting portion 54A. The weight portion 54 </ b> B extends from the mounting portion 54 </ b> A in a cross section orthogonal to the front-rear direction, and is weight balanced with the first crank arm 52 and the second crank arm 53 around the axis of the crankshaft 51. Is taking.

  The screw 55 has a flange abutting against the front surface of the balance weight 54, passes through a through hole (not shown) of the mounting portion 54 </ b> A and a through hole (not shown) of the first crank arm 52, and a screw hole (not shown) of the second crank arm 53. Are screwed together. By screwing the screws 55 in this manner, the balance weight 54 and the first crank arm 52 are brought into close contact with each other in the front-rear direction, and the first crank arm 52 and the second crank arm 53 are brought into close contact with each other.

  The piston portion 6 is composed of a low pressure side piston portion 6A driven by the first crank arm 52 and a high pressure side piston portion 6B driven by the second crank arm 53. The low pressure side piston portion 6A The compressed air is compressed and the compressed air is discharged to the high-pressure side piston portion 6B through the pipe 6C (FIG. 3), and the air discharged from the high-pressure side piston portion 6B is further compressed to create compressed air. Compressed air is discharged to the tank part 2 through 21B (FIG. 2).

  The low pressure side piston portion 6A is mainly composed of a low pressure side cylinder 61A, a low pressure side connecting rod 62A, and a low pressure side piston 63A. The low pressure side cylinder 61A is connected to the crankcase 41 so as to protrude leftward from the crankcase 41 on the paper surface of FIG. 4, and defines a low pressure side compression chamber 61a communicating with the crank chamber 41a. At the tip of the low-pressure side cylinder 61A, compressed air is connected to a valve (not shown) and a pipe 6C (FIG. 3) for taking air in the atmosphere into the low-pressure side compression chamber 61a. A valve 61 for supplying air is connected.

  The low pressure side piston 63A has a smaller diameter than the inner diameter of the low pressure side compression chamber 61a and is disposed in the low pressure side compression chamber 61a. The low pressure side lip ring 64A and the low pressure side lower piston 65A are connected toward the crank chamber 41a side. Yes. The low-pressure side lip ring 64A is fixed to the low-pressure side piston 63A with a screw 66A via a low-pressure side lower piston 65A, and the outer periphery thereof is configured to contact the inner surface of the low-pressure side compression chamber 61a. The air in 61a is prevented from leaking into the crank chamber 41a and the outside air. The low pressure side lip ring 64A prevents the low pressure side piston 63A and the inner surface of the low pressure side compression chamber 61a from being in direct contact with each other and being damaged.

  The low pressure side connecting rod 62A has one end connected to the outer periphery of the first crank arm 52 via a bearing 67A and the other end connected to the low pressure side lower piston 65A. The rotational motion is converted into the reciprocating motion of the low-pressure side piston 63A.

  The high-pressure side piston portion 6B mainly includes a high-pressure side cylinder 61B, a high-pressure side connecting rod 62B, and a high-pressure side piston 63B. The high pressure side cylinder 61B is connected to the crankcase 41 so as to protrude rightward from the crankcase 41 on the paper surface of FIG. 4, and defines a high pressure side compression chamber 61b communicating with the crank chamber 41a. A high pressure side cylinder 61B is connected to the pipe 6C and connected to a pipe 61B for taking in air discharged from the low pressure side compression chamber 61a into the high pressure side compression chamber 61b and a pipe 21B (FIG. 2). A valve 61E for discharging the compressed air compressed in the side compression chamber 61b toward the tank unit 2 is connected.

  The high pressure side piston 63B is smaller in diameter than the inner diameter of the high pressure side compression chamber 61b and is disposed in the high pressure side compression chamber 61b. The high pressure side lip ring 64B and the high pressure side lower piston 65B are connected toward the crank chamber 41a side. Yes. The high-pressure side lip ring 64B is fixed to the high-pressure side piston 63B with a screw 66B via a high-pressure side lower piston 65B, and the outer periphery thereof is configured to contact the inner surface of the high-pressure side compression chamber 61b. The air in 61b is prevented from leaking to the crank chamber 41a and the outside air. Further, on the crankshaft 51 side of the high pressure side lip ring 64B, a support ring 64C made of an elastic material having excellent wear resistance is disposed in a space formed by the high pressure side piston 63B and the high pressure side lower piston 65B. Has been. The surface on the high-pressure side lip ring 64B side of the support ring 64C has a shape in which the radially outer side protrudes toward the high-pressure side lip ring 64B. Further, the support ring 64C is configured such that a slight gap is formed between the high pressure side lip ring 64B and the outer peripheral surface of the high pressure side piston 63B when the high pressure side connecting rod 62B is tilted. With such a configuration, the outer peripheral portions of the support ring 64C and the high-pressure side lip ring 64B come into contact with the inner peripheral portion of the high-pressure side compression chamber 61b, and the high-pressure side lip ring 64B is in the high-pressure side compression chamber 61b. The high pressure side compression chamber 61b can be hermetically sealed so as to prevent the compressed air from being released to the crank chamber 41a and the outside air. Further, the high pressure side lip ring 64B and the support ring 64C prevent the high pressure side piston 63B and the high pressure side lower piston 65B from directly contacting the inner surface of the high pressure side compression chamber 61b and damaging each other.

  One end of the high pressure side connecting rod 62B is connected to the outer periphery of the second crank arm 53 via the bearing 67B, and the other end is connected to the high pressure side lower piston 65B. The rotational motion is converted into the reciprocating motion of the high-pressure side piston 63B.

  As shown in FIG. 2, the fixture 7 is disposed on the upper surface and front end position of the crankcase 41 and at the rear position of the fan 42 to hold the pipe 21 </ b> B, and mainly includes a base 71 and a holding portion 72. It is composed of The base 71 is made of aluminum, and is placed on the crankcase 41 via a resin sheet 7A, which is an elastic body. A hole 71a through which the screw 73 passes is formed at the rear end position, and the front end position and the upper surface position in the horizontal direction. A base-side holding groove 71b is formed extending in the direction. The base-side holding groove 71b has a shape that substantially matches the outer shape of the pipe 21B so that the pipe 21B is in close contact with the outer periphery of the pipe 21B with the pipe 21B extending in the left-right direction.

  The screw 73 is inserted into the hole 71a through a metal collar 73A and is screwed into a screw hole 41b formed in the crankcase 41. As the collar 73A, a resinous material can be used. A resin sheet 73B, which is an elastic body, is disposed between the flange of the screw 73 and the upper surface of the base 71 and the peripheral portion of the hole 71a. As described above, since the elastic body is interposed between the screw 73 for fixing the base 71 to the crankcase 41 and the crankcase 41, the vibration of the crankcase 41 is prevented from propagating to the base 71. Is done. A screw hole 71c into which a screw 74 described later is screwed is formed on the upper surface of the base 71 and behind the base-side holding groove 71b.

  The holding portion 72 is placed on the base portion 71, a hole 72 a through which the screw 74 passes is formed at the rear end position, and a holding portion side holding groove 72 b extending in the left-right direction is formed at the front end position and the lower surface position. The holding portion side holding groove 72b is formed to face the base side holding groove 71b and to have a shape that matches the outer shape of the pipe 21B, similarly to the base side holding groove 71b.

  The screw 74 is inserted into the hole 72a through the collar 74A, and is screwed into the screw hole 71c of the base 71. Between the flange of the screw 74 and the upper surface of the holding portion 72 and the peripheral portion of the hole 72a, there is an elastic body that urges the holding portion 72 to the base portion 71 located below the flange of the screw 74. A spring 74B is interposed. The holding part 72 can have a structure in which the pipe 21B is elastically sandwiched between the holding part 72 and the base part 71 by forming a structure that is biased to the base part 71 by the spring 74B.

  In the holding portion 72, a plurality of fins 72A are provided above the holding portion-side holding groove 72b. As shown in FIG. 2, the fin 72 </ b> A is configured by four plates having a longitudinal direction in the front-rear direction arranged in parallel in the left-right direction so that the cooling air from the fan 42 flows through the gap between the plates. It is configured.

  The control circuit unit 8 is disposed behind the drive unit 3 and controls on / off of the drive unit 3. The control circuit unit 8 is provided with a main power switch 8A.

  In the air compressor 1 having the above-described configuration, in order to generate compressed air, the main power switch 8A is turned on to drive the drive unit 3 to rotate the crankshaft 51 to reciprocate the low pressure side piston 63A and the high pressure side piston 63B. Move. Among the steps related to the reciprocating motion, in the suction step in which the low pressure side piston 63A and the high pressure side piston 63B move downward from the top dead center to the bottom dead center in the low pressure side compression chamber 61a and the high pressure side compression chamber 61b, the external air is While being sucked into the low pressure side compression chamber 61a, the air compressed in the low pressure side compression chamber 61a is sucked into the high pressure side compression chamber 61b. On the other hand, in the compression process in which the low pressure side piston 63A and the high pressure side piston 63B move upward from the bottom dead center to the top dead center in the low pressure side compression chamber 61a and the high pressure side compression chamber 61b, the low pressure side piston 63A and the high pressure side piston 63B. Compresses the intake air in the low-pressure side compression chamber 61a and the high-pressure side compression chamber 61b to generate compressed air. Further, the compressed air generated in the discharge process in which the low pressure side piston 63A and the high pressure side piston 63B reach the top dead center of the low pressure side compression chamber 61a and the high pressure side compression chamber 61b is discharged toward the high pressure side compression chamber 61b. At the same time, it is discharged toward the tank unit 2.

  By repeating the above suction process, compression process, and discharge process by the reciprocating motion of the low-pressure side piston 63A and the high-pressure side piston 63B, compressed air having an allowable maximum pressure can be supplied from the compressed air generation unit 4 to the tank unit 2. . In the process of producing the compressed air, the low pressure side piston portion 6A and the high pressure side piston portion 6B operate, and this operation involves vibration. Since the pipe 21B has a structure that is held by the fixed portion 21C and the valve 61E located at both ends, the pipe 21B may be shaken by the vibration and vibrate in the same manner, and the fixed portion 21C and the valve 61E may be damaged. However, by holding the fixture 7 at the position where the largest amplitude is likely to occur, the amplitude of the pipe 21B is reduced, the load acting on the fixture 21C and the valve 61E is reduced, and the fixture 21C and the valve 61E are reduced. Breakage can be prevented.

  Moreover, since the compressed air flowing through the pipe 21B is generated by compressing the air at normal temperature and pressure in the compressed air generation unit 4, the temperature becomes high. When this high-temperature compressed air is stored in the tank part 2 at a specified pressure, the pressure drops with the subsequent temperature drop of the compressed air due to heat dissipation from the tank part 2, and the performance of the air compressor 1 cannot be exhibited. There is a case. On the other hand, the pipe 21B and the fixture 7 that holds the pipe 21B are composed of a good heat conductor, and the fixture 7 is further provided with fins 72A, thereby reducing the temperature of the compressed air flowing through the pipe 21B, Compressed air can be stored in the tank unit 2.

  In the fixture 7, the base side holding groove 71b and the holding part side holding groove 72b for holding the pipe 21B are slightly larger than the outer shape of the pipe 21B. Therefore, since the contact area with the pipe 21B is large, the amount of heat transferred from the pipe 21B to the fixture 7 can be increased, and the temperature of the compressed air flowing through the pipe 21B can be reduced more favorably. Efficiency can be increased. Further, since the contact area is widened, the pressure per unit area applied from the fixture 7 to the pipe 21 </ b> B can be reduced, and the pipe 21 </ b> B is not damaged by the holding by the fixture 7. In particular, in the present embodiment, the pipe 21B is sandwiched between the holding portion 72 and the base portion 71 by the spring 74B. Since the pipe 21B is elastically held, the pipe 21B is prevented from being crushed.

  Further, as shown in FIG. 6, a sheet-like protection member 80 having high thermal conductivity may be provided outside the pipe 21 </ b> B, and the pipe 21 </ b> B may be sandwiched between the holding portion 72 and the base portion 71 via the protection member 80. By providing the protection member 80, the pipe 21 </ b> B can be protected from friction between the pipe 21 </ b> B and the holding portion 72 and the base portion 71. This protection is significant when the air compressor 1 is in operation. The protective member 80 is preferably made of a material having high thermal conductivity, and a resin material can be used in addition to a metal.

  The air compressor according to the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made within the scope described in the claims. For example, in the air compressor 1 according to the present invention, the pipe 21 </ b> B located between the tank unit 2 and the compressed air generation unit 4 is held. However, the present invention is not limited to this, and the amplitude increases due to vibration of the compressed air generation unit 4. If it is a pipe which becomes, you may hold | maintain not only the pipe 21B but another pipe. In addition, since the pipe 21B passes over the crankcase 41 of the compressed air generating unit 4 which is a high-strength structure, the fixture 7 is provided in the crankcase 41. However, the present invention is not limited to this, and a high-strength structure is obtained. If the pipe 21B is located at a location, for example, in the vicinity of the frame 23, the fixture 21 may be provided on the frame 23 to hold the pipe 21B. Further, the fixing device 7 is arranged on the downstream side of the fan 42 in consideration of the cooling performance. However, the cooling air of the fan 42 flows up to the vicinity of the driving unit 3 in the housing 1A, and thus is not necessarily limited to this position. .

1: Air compressor 1A: Housing 2: Tank part 3: Drive part 4: Compressed air generating part 5: Crank part 6: Piston part 6A: Low pressure side piston part 6B: High pressure side piston part 6C: Pipe 7: Fixing tool 7A : Resin sheet 8: Control circuit 8A: Main power switch 21: Tank 21A: Rubber foot for vibration isolation support 21B: Pipe 21C: Fixing part 23: Frame 23A: Handle 24A: Coupler 25A: Pressure reducing valve 26: Pressure gauge 31: Stator 32: Rotor 33: Output shaft portion 41: Crankcase 41a: Crank chamber 41b: Screw hole 42: Fan 51: Crankshaft 51A: Key 52: First crank arm 52a: First through hole 53: Second crank arm 53a : Second through hole 54: balance weight 54A: mounting portion 54B: weight portion 54a: perforation 55: screw 61: Valve 61A: Low pressure side cylinder 61B: High pressure side cylinder 61D: Valve 61E: Valve 61a: Low pressure side compression chamber 61b: High pressure side compression chamber 62A: Low pressure side connecting rod 62B: High pressure side connecting rod 63A: Low pressure side piston 63B: High pressure side Piston 64A: Low pressure side lip ring 64B: High pressure side lip ring 64C: Support ring 65A: Low pressure side lower piston 65B: High pressure side lower piston 66A: Screw 66B: Screw 67A: Bearing 67B: Bearing 71: Base 71a: Hole 71b: Base Side holding groove 71c: Screw hole 72: Holding part 72A: Fin 72a: Hole 72b: Holding part side holding groove 73: Screw 73A: Collar 73B: Resin sheet 74: Screw 74A: Color 74B: Spring

Claims (5)

A compressed air generating section that is driven by a driving section that outputs a rotational force and compresses air;
An air tank for storing the compressed air generated by the compressed air generation unit;
It is interposed between the compressed air generating section and the air tank, and is connected to the compressed air generating section at one end and connected to the air tank at the other end to compress the compressed air from the compressed air generating section to the air tank. A pipe for supplying air,
An air compressor characterized in that a fixing tool for holding the pipe between the one end and the other end is attached to the compressed air generating portion via an elastic body.   The air compressor according to claim 1, wherein the fixture includes a good heat conductor and has heat-dissipating fins. A blower fan that blows cooling air that cools the compressed air generation unit;
2. The air compressor according to claim 1, wherein the heat dissipating fins are disposed at positions in contact with the cooling air. The fixing device has a base portion attached to the compressed air generation portion, and a holding portion held by the base portion via an elastic body,
The air compressor according to any one of claims 1 to 3, wherein the pipe is held between the base portion and the holding portion.   5. The air compression according to claim 4, wherein a portion of the fixing device that holds the pipe is shaped to substantially match an outer shape of a portion of the pipe that is held by the fixing device. Machine.

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