JP2001003869A - Portable compressor - Google Patents

Abstract

(57) [Abstract] [Problem] To improve the portable type of a portable compressor,
To promote lighter and more compact. The bearing housing 17 is divided from the crankcase 20,
The motor 6 rotor 11 is cantilever type, the balance weight 10 is provided on the peripheral surface of the rotor 11, and the cooling intake 18 is provided inside the rotor, so that the whole can be reduced in size and weight. . [Effect] The bearing case 21 which becomes an anti-load of the conventional type motor is eliminated, and the reduction in size, weight and size is promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The disclosed technology belongs to the technical field of the structure of a portable compressor used for home building and the like.

[0002]

2. Description of the Related Art As is well known, it is the first desire that a compressor used in civil engineering and construction be a lightweight, small and portable type in terms of handleability and workability.
Conventionally, various types of portable compressors have been devised and put into practical use.

For example, as shown in FIG. 4, a portable compressor 3 having a frame having handles 1 on both sides and having pressure accumulation tanks 2 and 2 'is provided with movable pistons 4 and 4' for high pressure and low pressure by crank pins. 5, 5 ', and a type in which a crankshaft 8 provided on a bearing 7 of a motor 6 is linked is often used.

[0004]

SUMMARY OF THE INVENTION
In the portable compressor 3 according to the prior art, heat is easily trapped due to its small size, so that the heat generated by the motor increases and heat is conducted to the crankcase side. There is a drawback that the temperature of the intake air sucked into the case rises, leading to a decrease in the suction efficiency and a reduction in the life of the bearings and the like.

However, in order to suppress the heat generated by the motor, an electric cooling fan must be separately provided or the outer diameter of the cooling fan 12 must be increased. Had the disadvantage of becoming

In FIG. 4, reference numeral 12 denotes a cooling fan for blowing cooling air to the entire mechanism.

[0007]

SUMMARY OF THE INVENTION An object of the invention of the present application is to solve the problems which may hinder the internal mechanism of the prior art and the portable compressor based on the prior art. Providing an excellent portable compressor structure that benefits the compressed air technology application field in various industries by maintaining good compactness, easy handling, low cost manufacturing, and good operability. It is something you want to do.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the structure of the invention of the present application for solving the above-mentioned problems is to move the stator of the motor relative to the crankcase with respect to the coil side. In a compressor structure that is fixed directly from the side via a bearing box, a balance weight is disposed on the side surface of the rotor of the motor, and the bearing box is divided from the crankcase, and the motor bearing is formed into a single bearing type. In addition, a cooling air intake for cooling is provided in the stator frame mounting portion of the motor of the crankcase, and a cooling fin is mounted inside the rotor of the motor. If the compressor balance is mounted on the outer peripheral surface of the motor rotor, an outer-balanced portable compressor system In which took technical means also as it is.

[0009]

In the same manner as in the conventional mode, a compressor for sucking and compressing outside air and a motor for driving the compressor are directly connected to a crankcase using an axial type motor, and reciprocating motion is performed by a crankpin attached to a motor shaft. The compressed gas output at is sent to the accumulator tank,
The motor's stator is fixed to the crankcase directly with bolts from the side of the coil via a bearing box.
This eliminates the need for a conventional type motor bearing anti-load bearing case, thereby further reducing the size and weight.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of embodiments of the present invention, with reference to FIGS. 1 to 3. FIG.

The same parts as those in FIG. 4 are described using the same reference numerals.

The embodiment shown in FIGS. 1, 2 and 3 is an embodiment, which is a portable compressor 3 which forms the center of the gist of the invention of this application, and includes a pair of handles 1, 1 on both sides and a drum type. Pressure storage tanks 2 and 2 'on both sides, and low-pressure and high-pressure movable pistons 4 and 4' near the two sides of the pressure storage tanks 2 and 2 '. The air sucked by being connected to the crankshaft 8 connected to the rotor 11 of the motor 6 is compressed and stored in the pressure accumulation tanks 2, 2 '.

A balance weight 10 is provided around the outer surface of the rotor 11 of the motor 6 in a predetermined manner. Therefore, in the present invention, the balance weight 10 is attached to the outer peripheral surface of the rotor 11. And
The rotor 11 attached to the crankshaft 8 does not use the bearing housing 7 on both sides as in the conventional mode, but is of a cantilever type. They are often very convenient and cheap.

The bearing housing 17 is bolted by bolts 16.
It is directly fixed, so that
The conventional motor anti-load bearing case 21 is not required, which greatly contributes to downsizing and weight reduction.

When the stator 9 and the rotor 11 of the motor are replaced, the compression mechanism can be replaced without disassembling without press-fitting and fixing, but only by tightening in the axial direction. It can be easily replaced.

A cooling air intake 18 is provided in the vicinity of the mounting position of the crankshaft 8 of the rotor 11 of the motor 6, and a cooling fin 19 is mounted on the intake 18 inside the rotor. Thus, the coil of the motor 6 can be cooled directly at a short distance.

Reference numerals 13 and 13 'denote instrumentation equipment.
In order that the pressure storage tanks 2 and 2 'can be shared (shared),
Blocked for easy installation and removal.

In the compressor 3 of the present invention, the handles 1, 1 are provided on both sides of the compressor 3. Therefore, the compressor 3 is installed in a standing posture, a lateral posture, or between appropriate devices. It is very easy to do.

The crankcase 20 for fixing the motor stator 9 is provided with an opening 14 for the cooling air 15 from the cooling fan 12 so that the stator 9 of the motor 6 is directly cooled, thereby reducing the weight and size of the main unit. It is something that is to be promoted.

Reference numeral 9 denotes a general resin-made axial fan for blowing cooling air as in the conventional embodiment, and the compressor 3 '.
It is attached to the front of.

[0021]

As described above, according to the invention of this application, basically, in a portable compressor, a compressor section for sucking and compressing outside air and a motor for driving the compressor section are directly connected to a crankcase, and a crank mounted on a motor shaft is provided. The compressed air is stored in the accumulator tank by reciprocating motion with the pin cam, and the motor's stator is fixed to the crankcase directly from the coil side via bolts through the bearing box. This eliminates the need for a conventional and conventional motor anti-load bearing case, promotes downsizing, weight reduction, and compactness, and provides an excellent effect of further improving handling.

Further, since the balance weight is attached to the side surface of the rotor of the motor, there is also an advantage in manufacturing that the integrated manufacture of the rotor and the balance weight becomes extremely easy.

Since the balance weight is attached to the outside of the crankcase, not to the inside, it has a good balance in the diametrical direction in terms of space. Therefore, it is not necessary to take a large amount of balance. There is a plus that promotion is promoted.

Since the cooling fan is provided inside the rotor and the cooling intake port is provided, the cooling effect is mechanically provided to each mechanism, and the effect of improving the durability is also exhibited.

The motor bearing is basically cantilevered, so that a compressor without a bearing case can be provided. In this respect, the compactness is excellent in external form, and the weight reduction is further promoted. The effect is achieved.

In the case where safety is particularly an issue, it is sufficient to simply attach a cover made of resin or the like simply.
There is an effect that the handleability at that point is also improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is the same drawing.

FIG. 4 is a schematic plan view of a portable compressor according to the prior art.

[Explanation of symbols]

 6 Motor 17 (Bearing box) 20 Crankcase 3 Compressor 10 Balance weight 11 Rotor 15 Cooling air 19 Cooling fin 12 Cooling fan

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[Procedure amendment]

[Submission date] June 21, 1999 (1999.6.2
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

Reference numeral 12 denotes a general resin-made axial fan for blowing cooling air as in the conventional embodiment,
It is attached to the front of.

Claims (4)

[Claims] In a compressor structure for fixing a motor stator to a crankcase, a bearing box is divided from the crankcase, and the motor stator is directly clamped from the side of the coil via the bearing box and fixed. A portable compressor characterized in that the motor bearing is a single bearing type. 2. The portable compressor according to claim 1, wherein a cooling air intake for cooling is provided in a stator frame mounting portion of the motor of the crankcase. 3. The portable compressor according to claim 1, wherein cooling fins are mounted inside the rotor of the motor. 4. The portable compressor according to claim 1, wherein the balance of the compressor is an outer balance type portable compressor system attached to the outer peripheral surface of the motor rotor.