JPH10246185A - Tank integrated type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a tank integrated type compressor forming into compactness, so that carrying work or the like can be easily performed. SOLUTION: A pair of storage tanks 1, 1 formed as a cylindrical closed vessel are integrally connected through a frame 3 or the like, so as to right/left separate each tank 1 extended in parallel to each other in a longitudinal direction. On the frame 3 or the like, an electric motor 8 and a compressor main unit 12 are mounted, in this constitution, mutually integrally formed motor casing 9 and crankcase 13 are extended in the same direction to the tank 1 between each tank 1. Between the right/left separated storage tanks 1, 1, the motor casing 9 and the crankcase 13 are set up, so that a lower part side thereof is partially advanced between each tank 1, through the frame 3 or the like. In this way, the height dimension of a compressor total unit is decreased, a compressor can be compactly formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank-integrated compressor suitably used for compressing a fluid such as air, for example, and more particularly, to a compact compressor which can be easily carried. The present invention relates to a tank-integrated compressor.

[0002]

2. Description of the Related Art Generally, a cylindrical tank for storing a compressed fluid, an electric motor provided on the tank, and a tank provided on the tank at a distance from the electric motor in the longitudinal direction of the tank; A compressor body rotatably driven by the electric motor, wherein the compressor body is provided on a crankcase provided rotatably with a crankshaft, a cylinder mounted on the crankcase, and provided on the cylinder. A tank-integrated compressor including a cylinder head that defines a compression chamber between a piston in the cylinder and a suction chamber and a discharge chamber provided independently of each other in the cylinder head is For example, it is known from JP-A-63-235678.

In a conventional tank-integrated compressor of this type, an electric motor drives a crankshaft of a compressor body via a pulley, a belt, or the like, and rotates the piston in a cylinder in accordance with the rotation of the crankshaft. Is reciprocated so that fluid such as air sucked from the suction chamber side is compressed in the compression chamber. The compressed fluid compressed in the compression chamber of the compressor body is discharged from the discharge chamber to a tank via a pipe or the like, and stored in the tank.

[0004]

In the above-mentioned prior art, the electric motor and the compressor main body are arranged on a substantially cylindrical single tank so as to be separated from each other in the longitudinal direction of the tank. In addition, an electric motor, a crankcase, and the like are configured to extend in a direction substantially orthogonal to the length direction of the tank.

[0005] For this reason, in the prior art, the entire compressor is increased in size, requiring a large amount of labor for carrying, and occupying a large occupied space in, for example, a truck for transportation. There is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention can be made compact by making the whole compact, so that the space occupied during transportation can be reduced and the carrying work and the like can be easily performed. It is an object of the present invention to provide a tank-integrated compressor capable of performing the above-described operations.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a pair of storages, which are separated from each other in a left and right direction and extend in parallel with each other to store a compressed fluid. A tank, a drive motor disposed between the storage tanks so that at least the lower side enters between the storage tanks, and extending in the same direction as the storage tanks, and a fluid driven by the drive motor and sucked from the outside. The compressor is configured to discharge the compressed fluid to each of the storage tanks while compressing.

According to the above construction, the drive motor can be extended between the pair of storage tanks in the same direction, and at least the lower side of the drive motor can be placed at a position lower than the upper end side of each storage tank. , The overall height can be reduced, and the whole can be made compact.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 to 6 show an example in which the tank-integrated compressor according to the embodiment of the present invention is applied to a two-stage air compressor.

In the figures, reference numerals 1 and 1 denote a pair of storage tanks (hereinafter referred to as tanks 1) spaced apart left and right and extending in parallel with each other, and each of the tanks 1 is a metal tube as shown in FIGS. It is formed as a substantially cylindrical closed container from such as,
Its length is, for example, about 3 to 4 times the outer diameter of the tank 1. Further, a protective cover 2 for covering an electric motor 8 and a compressor main body 12, which will be described later, is provided on each tank 1 as shown in FIG. 1, and the protective cover 2 is detached as necessary. Has become. 2 to 6 show a state in which the protective cover 2 is removed.

Reference numerals 3 and 4 denote frames connecting the tanks 1 in the left-right direction. The frames 3 and 4 are made of a metal material having high rigidity as shown in FIGS. , Are integrally fixed to the tanks 1 at both rear end sides. The frames 3 and 4 support the electric motor 8 together with a compressor body 12 described below from below.

Reference numerals 5, 5,... Denote cushion rubbers provided at both ends of each tank 1. The cushion rubbers 5 are made of a resin material such as synthetic rubber. It is attached to the lower surface side of the tank 1.
Each cushion rubber 5 is configured to stably mount each tank 1 on the ground of a work site or the like and to protect the lower surface side of each tank 1. In addition, each cushion rubber 5 has a function of attenuating vibration from the compressor body 12, the electric motor 8, and the like by having elasticity.

Reference numerals 6 and 6 denote handles for carrying the compressor. Each of the handles 6 is formed in a substantially U-shape from a rigid material as shown in FIG. It is arranged so as to straddle between the left and right tanks 1, 1. At each end of each tank 1, mounting brackets 7, 7,... For the handles 6 are provided on the upper surface side, as shown in FIG. It is mounted so as to project upward from the tank 1.

Reference numeral 8 denotes an electric motor serving as a driving motor mounted on the frame 4 between the tanks 1. The electric motor 8 has a stator and a rotor in a motor casing 9 as shown in FIG. The rotary shaft 10 is driven to rotate by external power supply. As shown in FIG. 2, the electric motor 8 has a motor casing 9 extending in parallel with the longitudinal direction of each tank 1, and a distal end thereof is integrated with a crankcase 13 described later. The lower part 9A side of the motor casing 9 is disposed so as to partially enter the space S between the tanks 1 as shown in FIG.
The motor casing 9 and each tank 1 are arranged in a substantially equilateral triangular arrangement.

The rotating shaft 10 of the electric motor 8 extends through the inside of the crankcase 13 in the axial direction, and a cooling fan 11 is attached to the tip of the rotating shaft 10 protruding from the crankcase 13. The electric motor 8 rotates the cooling fan 11 to generate cooling air along the length direction of each tank 1, and the cooling air is directed toward the electric motor 8 into and out of the crankcase 13. As a result, the compressor body 12 and the electric motor 8 are cooled by an air flow.

Reference numeral 12 denotes a compressor main body disposed between the tanks 1 via the frame 4 and the like together with the electric motor 8. The compressor main body 12 includes a crankcase 13, and cylinders 14, 17, which will be described later. This constitutes a so-called horizontally opposed two-stage air compressor in which 14 and 17 are disposed so as to face each other in the horizontal direction as shown in FIG.

Reference numeral 13 denotes a motor casing 9 of the electric motor 8.
The crankcase integrated with the crankcase 1
3 is formed in a substantially cylindrical shape, and is disposed between the tanks 1 so as to be coaxial with the motor casing 9. A crankshaft (not shown) is rotatably provided in the crankcase 13, and the crankshaft is configured to rotate integrally with the rotating shaft 10 of the electric motor 8. As shown in FIG. 4, the lower part 13A of the crankcase 13 is disposed so as to partially enter the space S between the tanks 1, and the crankcase 13 and the tanks 1 are arranged in a substantially equilateral triangle as a whole. Have a relationship.

As shown in FIG. 4, the cooling fan 11 has a large blade diameter at the end of the crankcase 13 so as to effectively utilize the space between the tanks 1. The cooling fan 11 is rotationally driven by the rotating shaft 10 in this space, so as to increase the amount of cooling air as much as possible. An outside air intake 13B is provided at the end of the crankcase 13 on the cooling fan 11 side.
4 (see FIG. 4), and a suction filter (not shown) for taking clean air into the crankcase 13 is attached to the inlet 13B.

Reference numeral 14 denotes a low-pressure side cylinder which constitutes a first cylinder provided in the crankcase 13. The low-pressure side cylinder 14 has a base end fixed to the crankcase 13 as shown in FIGS. It extends horizontally on one tank 1 (left tank 1 shown in FIG. 4).
A low-pressure side piston (not shown) is slidably inserted into the low-pressure side cylinder 14, and the piston reciprocates in the cylinder 14 according to the rotation of the crankshaft.

Reference numeral 15 denotes a cylinder head which is provided at the tip end of the low-pressure side cylinder 14 and forms a first cylinder together with the low-pressure side cylinder 14. Inside the cylinder head 15, a suction chamber and a discharge chamber (not shown) are provided. The suction chamber and the discharge chamber are connected to and blocked from the low-pressure side cylinder 14 via a suction valve and a discharge valve (not shown), respectively. The suction chamber communicates with the crankcase 13 through an intake passage (not shown) or the like, and the air flowing into the crankcase 13 from the intake 13B side is supplied to the low pressure side according to the reciprocating motion of the piston. It is designed to be sucked into the cylinder 14.

Reference numeral 16 denotes a discharge pipe connected to the discharge chamber side of the cylinder head 15. The discharge pipe 16 is connected to a high-pressure cylinder head 18 through a communication pipe 19 described later, and is generated in the low-pressure cylinder 14. The compressed air is discharged from the discharge chamber of the cylinder head 15 to the communication pipe 19 side.

Reference numeral 17 denotes a high-pressure side cylinder constituting a second cylinder mounted on the crankcase 13 so as to face the low-pressure side cylinder 14 in the horizontal direction.
The base 7 is fixed to the crankcase 13 at the base end as shown in FIGS. 2 and 4, and extends in the horizontal direction on the other end of the tank 1 (the right tank 1 shown in FIG. 4). The high-pressure cylinder 17 has a smaller cylinder diameter than the low-pressure cylinder 14.
A high-pressure-side piston (not shown) is slidably inserted therein.

Reference numeral 18 denotes a cylinder head provided at the tip end of the high-pressure side cylinder 17 and constituting a second cylinder together with the high-pressure side cylinder 17. The cylinder head 18 has the same suction as the low-pressure side cylinder head 15. A chamber and a discharge chamber are formed, and the suction chamber and the discharge chamber are connected to and blocked from the high-pressure side cylinder 17 via a suction valve and a discharge valve (both not shown). The ends of the cylinder heads 15 and 18 are, as shown in FIGS.
The tanks 1 are provided at positions inside the tanks 1 so as not to protrude left and right.

A communication pipe 19 connects the suction chamber side of the cylinder head 18 to the discharge pipe on the low pressure side.
Numeral 9 is for supplying the compressed air generated in the low pressure side cylinder 14 to the high pressure side cylinder head 18 side. The communication pipe 19 is formed to be curved downward so as to bypass the lower side of the crankcase 13, and
Drain in the compressed air generated inside the cylinder
It is configured to suppress intrusion into the 7 side.

Reference numeral 20 denotes a discharge pipe connected to a discharge chamber of the cylinder head 18. The discharge pipe 20 extends horizontally from the lower surface of the cylinder head 18 to the front along the tank 1 as shown in FIGS. 4, once bent upward in a substantially L-shape to extend in a substantially U-shape on the high-pressure side cylinder 17 and the cylinder head 18, and then bent downward again so that the lower end (tip) side in FIG. It is connected to the tank 1 on the right. The discharge pipe 20 leads high-pressure compressed air discharged from the high-pressure side cylinder 17 into the tank 1.

Reference numeral 21 denotes an unloading conduit, and 22 denotes an unloading valve connected to the conduit 21. The unloading valve 22 is opened and closed via a solenoid valve 23 shown in FIG. By being held, the compressor body 12 is loaded. When the unload valve 22 is opened by the electromagnetic valve 23, the high-pressure side cylinder 17
The compressed air guided from the cylinder head 18 side through the conduit 21 is released to the atmosphere, and the compressor main body 12 is unloaded.

Numeral 24 denotes a supply pipe for compressed air which connects the tanks 1 to each other. As shown in FIG.
One end side is connected to one tank 1 bypassing the rear end side of the electric motor 8, and the other end side extends forward along the motor casing 9 and the crankcase 13 of the electric motor 8, while being connected to the low pressure side cylinder 14. After being bent in a substantially U-shape as shown in FIG. 3 so as to bypass the upper side, the lower end (tip) side is connected to the other tank 1.

Reference numerals 25 and 26 denote compressed air supply ports. The supply ports 25 and 26 are individually connected at their base ends to intermediate portions of the supply pipe 24 via valves or the like, and their top ends are tanks as shown in FIG. 1 extending upward. And supply port 2
External pipes (not shown) for supplying compressed air to pneumatic devices such as air cylinders and air motors are detachably connected to the distal ends of the valves 5 and 26, respectively. The compressed air in the tank 1 is allowed to be supplied to an external pneumatic device.

Reference numerals 27 and 28 denote pressure setting devices connected to intermediate portions of the supply ports 25 and 26. The pressure setting devices 27 and 28 are composed of pressure-reducing valves of a variable set pressure type and the like, and are used for supplying pressure to the pneumatic equipment. The air pressure can be adjusted arbitrarily by manual operation or the like. Reference numerals 29 and 30 denote pressure gauges. The pressure gauges 29 and 30 are used by an operator to visually confirm the pressure of the compressed air set by the pressure setting devices 27 and 28.

A drain cock 31 discharges the drain in the supply pipe 24 to the outside via a drain tube 32. The drain cock 31 is connected to the left tank 1 and the supply pipe 24 as shown in FIGS. It is arranged between the ends.

The tank-integrated two-stage air compressor according to this embodiment has the above-described configuration, and its operation will be described below.

First, power is supplied to the electric motor 8 to
When the cooling fan 11 rotates, the cooling air flows along the inside and outside of the crankcase 13 and the motor casing 9 by rotating the cooling fan 11, and the crankshaft is rotated in the crankcase 13 so that the low-pressure side cylinder 14 and Each piston reciprocates in the high-pressure side cylinder 17.

Thus, in the low-pressure side cylinder 14, the air flowing from the intake 13 B side of the crankcase 13 is sucked into the cylinder 14 through the intake passage and the suction chamber as the piston reciprocates. To generate compressed air of the first stage.

The compressed air generated in the low-pressure side cylinder 14 is discharged from the discharge pipe 16 of the cylinder head 15 into the communication pipe 19, and continuously communicates with the high-pressure side cylinder 17 through the communication pipe 19. The suction generates high-pressure compressed air at the second stage. The high-pressure compressed air is discharged from the discharge chamber of the cylinder head 18 to one of the tanks 1 through the discharge pipe 20, and is also supplied to the other tank 1 through the supply pipe 24. It is stored in the tank 1.

When the compressed air in each tank 1 is supplied to an external air compressor or the like, the supply ports 25 and 26 are opened and closed by valves while the external pipes are connected to the supply ports 25 and 26, and the external air is compressed. Supply compressed air to pneumatic equipment

According to the present embodiment, the pair of tanks 1, 1 formed as cylindrical closed containers are connected together via the frames 3, 4, so that each tank 1
Are separated to the left and right, and extend in parallel in the front and rear directions, and the electric motor 8 and the compressor main body 12 are mounted on the frames 3 and 4 so that the motor casing 9 and the crankcase 13 are integrated with each other. Are configured to extend between the tanks 1 in the same direction as the tanks 1, the following operational effects can be obtained.

That is, the motor casing 9 and the crankcase 13 are provided between the tanks 1 and 1 which are separated to the left and right, and the frames 3 and 4 are so arranged that the lower portions 9A and 13A partially enter between the tanks 1. The compressor can be compactly formed by reducing the overall height of the compressor. Further, a cooling fan 11 which is located between the tanks 1 and is rotated by the rotating shaft 10 of the electric motor 8 can be arranged with a margin on the end side of the crankcase 13, so that the space between the tanks 1 can be effectively used. Cooling fan 1
In addition to increasing the diameter of one blade, a large amount of cooling air can be generated by the cooling fan 11 and the inside and outside of the crankcase 13 and the motor casing 9 can be efficiently cooled.

The compressor body 12 is provided with low-pressure and high-pressure cylinders 14 and 17 so as to project horizontally from the crankcase 13 to the left and right tanks 1 and 1, respectively.
The cylinder head 1 is located at the tip side of the cylinders 14 and 17.
5 and 18 are integrally provided, so that a horizontally opposed two-stage air compressor including these crankcase 13, cylinders 14 and 17 and cylinder heads 15 and 18 is compactly arranged on each tank 1. The low pressure side and high pressure side cylinder heads 15 and 18 are
From the left and right directions, and the overall width (left-right direction) including each tank 1 and the compressor body 12 can be reduced.

Therefore, according to the present embodiment, the entire compressor can be downsized and formed compact, the space occupied during transportation can be reduced, and the portable work at the work site can be easily performed. And the range of application as a portable compressor can be greatly expanded.

In the above-described embodiment, the case of using as a two-stage air compressor has been described as an example. However, the present invention is not limited to this. For example, a single cylinder air compressor integrated with a tank or The present invention may be applied to a multi-stage air compressor having three or more cylinders. Further, the present invention is not limited to the air compressor, and may be used to compress various fluids such as nitrogen gas and refrigerant.

[0042]

As described above in detail, according to the present invention, the drive motor is extended in the same direction between a pair of storage tanks which are separated to the left and right and extend in parallel with each other. And at least the lower side of the drive motor is arranged so as to enter between the storage tanks, and by driving the compressor body with the drive motor, the fluid sucked from the outside is compressed by the compressor body. While the compressed fluid was discharged to each storage tank, the drive motor was extended in the same direction between the pair of storage tanks, and at least the lower side of the drive motor was positioned lower than the upper end of each storage tank. This makes it possible to make the whole compressor compact and compact, and to reduce the space occupied during transportation, making it possible to carry around at a work site or the like. It can be done to ease.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tank-integrated two-stage air compressor according to an embodiment of the present invention.

FIG. 2 is a plan view showing the two-stage air compressor in a state where a protective cover in FIG. 1 is removed.

FIG. 3 is a front view showing the two-stage air compressor in a state where a protective cover in FIG. 1 is removed.

FIG. 4 is a left side view of the two-stage air compressor shown in FIG.

FIG. 5 is a right side view of the two-stage air compressor shown in FIG.

FIG. 6 is a rear view of the two-stage air compressor shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage tank 2 Protective cover 3, 4 Frame 6 Handle 8 Electric motor (drive motor) 9 Motor casing 10 Rotating shaft 11 Cooling fan 12 Compressor body 13 Crank case 14 Low pressure side cylinder 15, 18 Cylinder head 17 High pressure side cylinder 19 Communication Pipe 20 Discharge pipe 24 Supply pipe

Claims (1)

[Claims] 1. A pair of storage tanks extending in parallel to each other and separated from each other to the left and right, and disposed between the respective storage tanks so that at least a lower side enters between the respective storage tanks. A drive motor extending in the same direction as each of the storage tanks, and a compressor body that is driven by the drive motors and discharges a compressed fluid to each of the storage tanks while compressing fluid sucked from outside. Tank integrated compressor.