JP2001182657A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively cool a motor in a housing housing type. SOLUTION: Intake air holes 30, 30 of cooling air of a motor 2 are formed in a rear surface of a motor housing 9, and second intake air holes 31, 31 opposed to the rear surface of the motor housing 9 are formed in a half-split housing 7 respectively. Ring-shaped ribs 32, 32 are concentrically formed on an inside surface of the half-split housing 7; a sponge ring is fitted in; the tip of a ring-shaped rib 35 formed on the rear surface of the motor housing 9 is immersed in a front face of the sponge ring 34; and an air passage 36 is formed for partitioning and connecting the intake air holes 30 and the second intake air holes 31 in a housing 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor in which components such as a motor, an air compressor and a pressure storage tank are housed in a housing.

[0002]

2. Description of the Related Art A compressor includes a motor, an air compressor for compressing air by reciprocating a piston by a driving force obtained from the motor, and an accumulator tank for accumulating compressed air supplied from the air compressor. The motor is provided with a cooling fan on the output shaft, and an intake hole and an exhaust hole are provided on the motor housing, respectively. The rotation of the cooling fan along with the rotation of the output shaft generates an air flow in the motor housing. Thus, the motor can be cooled. On the other hand, there are known a type in which these components are all exposed and a type in which the entirety is housed in a housing (for example, Japanese Utility Model Application Laid-Open No. 58-6979).

[0003]

In the above-mentioned exposed type, since the motor can be cooled by taking in low-temperature outside air into the motor housing, a necessary cooling effect can be obtained. There is a disadvantage that it is easily affected by On the other hand, the housing accommodation type can reduce the noise, but takes in the air in the housing whose temperature has increased due to the heat generated by the air compressor and the like into the motor housing, so that the motor cooling effect is reduced. Therefore, a wind window is provided in the housing to take in outside air from the outside of the housing. Causes a decline.

Accordingly, an object of the present invention is to provide a compressor that can effectively realize cooling of a motor while maintaining the dust-proof effect of the housing-housing type.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a second intake hole is formed near an intake hole in a housing, and a second intake hole is formed in the housing. An air passage connecting the intake port to the interior of the housing is defined. In addition to the object of claim 1, the invention according to claim 2 absorbs dimensional tolerances and assembly errors of the motor housing and the housing to reliably partition the air passage in the housing, and to generate vibration to the housing. In order to enable the prevention, the air passage is formed by a cylindrical body projecting from the motor housing and / or the housing and connecting the intake hole and the second intake hole, and a connecting portion of the cylindrical body has an elasticity. The body is interposed. According to a third aspect of the present invention, in addition to the first or second aspect, a second exhaust hole is formed in the housing in order to prevent a rise in the temperature of the component due to stagnation of air after cooling the motor. A second exhaust hole and a second exhaust hole of the motor housing are defined and connected inside the housing.
An air passage is formed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a horizontal sectional view of a compressor 1, and FIG. 2 is a sectional view in a lateral direction. The compressor 1 mainly includes a motor 2, an air compression unit 3 which obtains torque from the motor 2 and sends out compressed air, and air. It comprises a pressure accumulation tank 4 for accumulating the air sent from the compression section 3, and these components are entirely housed in one housing 5. The housing 5 includes half housings 6 and 7 vertically divided in a longitudinal direction, and a base 8 that closes a bottom portion thereof. The motor 2 is moved in the short direction of the housing 5 and the air compression unit 3 is moved in the longitudinal direction. The accumulator tanks 4 are arranged along each of them, and the accumulator tank 4 is arranged above them. First, the motor 2 closes a cylindrical motor housing 9 and its front (the upper part in FIG. 1; hereinafter, only the motor 2 will be described as the upper and lower parts in FIG. 1) so that the output shaft 11 of the motor 2 is A pulley 12 is fitted on an output shaft 11 that is built in with the supporting cover 10 and protrudes from the motor housing 9. 1
Reference numeral 3 denotes a cooling fan for the motor 2 fixed behind the cover 10 in the motor housing 9.

On the other hand, in the air compression section 3, the cover 1
In the crank housing 14 adjacent to the motor housing 9, the spindle 15 is supported at right angles in the crank housing 14 adjacent to the motor housing 9, and the large-diameter pulley 16 and the pulley 12 of the output shaft 11 are keyed to the tip of the spindle 15. Belt 17 between
And the torque from the motor 2 is applied to the spindle 15.
It can be transmitted to. Reference numeral 18 denotes a crank which penetrates the spindle 15 at an eccentric position in the crank housing 14 and is key-coupled. The crank 18 is supported by a ball bearing 19 at the base end of the piston rod 20 so that the distal end of the piston rod 20 Is reciprocally movable in a cylinder 22 connected to the front of the crank housing 14 (the left side in FIG. 1; hereinafter, the left and right sides will be described in the air compression section 3).

Reference numeral 23 denotes a cylinder head which is connected to the front of the cylinder 22 via a valve plate 24. The valve plate 24 has a ventilation hole 25 formed therein and its free end closes the ventilation hole 25. Cylinder head 23
The base end of the valve 26 is fixed to the side surface. The cylinder head 23 is connected to a check valve 28 of the accumulator tank 4 by a pipe 27, and an air socket 29 exposed on a side surface of the housing 5 is connected to the accumulator tank 4. Therefore, when the motor 2 is driven, the rotation of the output shaft 11 is transmitted to the spindle 15 via the belt 17, and the crank 18 eccentrically rotates with the rotation of the spindle 15, thereby causing the piston 21 to reciprocate. When the piston 21 reciprocates, the air in the cylinder 22 enters the cylinder head 23 from the vent hole 25 and is sent to the pressure accumulating tank 4 through the pipe 27, and the compressed air is accumulated in the pressure accumulating tank 4. The compressed air can be taken out through a hose connected to the air socket 29.

Then, by the rotation of the cooling fan 13 accompanying the rotation of the output shaft 11, air is sucked from the intake holes 30, 30,... Formed on the rear surface of the motor housing 9, and the exhaust holes 38 ( The motor 2 can be cooled by being discharged from the motor housing 9, but here, a plurality of second air intake holes 31 are formed in the half housing 7 so as to face the rear surface of the motor housing 9. Been the second
Air can be sucked in from the outside of the housing 5 through the intake holes 31. However, on the inner surface of the half housing 7, ring-shaped ribs 32, 32 as a cylindrical body surrounding the second air intake holes 31, 31,. , 32, a sponge ring 34 having a ring shape is fitted. 33 is an auxiliary rib formed between the ribs 32 and 32 at a lower height than the rib 32 and supporting the rear surface of the sponge ring 34.
On the other hand, also on the rear surface of the motor housing 9, the intake holes 30, 3 are provided.
A ring-shaped rib 35 as a cylindrical body surrounding 0... Projects rearward concentrically and with the same diameter as the auxiliary rib 33 on the half housing 7 side, and the tip of the rib 35 is provided on the front surface of the sponge ring 34. The air passage 36 is formed so as to be immersed so as to partition and connect between the intake hole 30 and the second intake hole 31 in the housing 5.

On the other hand, a housing 37 for the cooling fan 13 is formed in the cover 10 of the motor housing 9, and the front of the housing 37 gradually projects forward as shown in FIGS. A spiral exhaust hole 38 that opens below is extended, and a duct 39 is connected to the exhaust hole 38. As shown in FIG. 5, the duct 39 is formed along the lower surfaces of the crank housing 14, the cylinder 22, and the cylinder head 23, has a U-shaped cross section with an upper opening, and has a The screw housings 39a, 39a are screw-fixed so that the upper portions thereof are closed by the lower surfaces of the crank housing 14, the cylinder 22, and the cylinder head 23 over the entire housing. Further, the tip of the duct 39 curves so as to open upward at a position slightly beyond the front surface of the cylinder head 23, and at the bottom of the duct 39, a current plate 40, along the longitudinal direction of the duct 39.
40 ... stand in parallel. 41, 41 ...
The fins 41 project upward and downward from the front surface of the cylinder head 23, and each fin 41 is connected at its upper end by a guide plate 42 and serves as a bottom between the fins 41, 41.
As shown in FIG. 6, the front surface of 3 is curved upward and gently continues to the lower surface of the guide plate 42.

Further, an exhaust cover 43 is provided in front of the cylinder head 23 in the housing 5.
The exhaust cover 43 has a cylindrical portion 44 formed so as to slightly cover the front ends of the fins 41, 41..., And a plurality of second exhaust holes 45, 45 are provided at positions in front of the cylinder head 23.・ ・ Is formed. Therefore, inside the housing 5, the duct 39, the fin 41 of the cylinder head 23, and the cylindrical shape of the exhaust cover 43 are provided between the exhaust hole 38 on the motor 2 side and the second exhaust holes 45, 45. The second air passage 46 defined and connected in the housing 5 by the portion 44 is formed.

The compressor 1 configured as described above has
When the cooling fan 13 rotates with the driving of the motor 2,
The motor 2 is cooled by taking in air from the intake holes 30, 30,.
Are connected by the air passage 36 defined in the housing 5, the air passages 3, 31 are connected from the second air intake holes 31, 31.
6, the air outside the housing 5 passes through the air intake holes 30, 30.
Will be introduced from The air that has cooled the motor 2 and passed through the cooling fan 13 enters the duct 39 from the storage chamber 37 through the exhaust hole 38, passes through the duct 39, and moves upward from below the cylinder head 23. Is discharged. Then, since the direction is changed forward from the front surface of the cylinder head 23 by the guide plate 42 between the fins 41, 41,.
, And is exhausted to the outside of the housing 5 through the second exhaust holes 45. At this time, when passing through the lower surface of the cylinder 22 and the front surface of the cylinder head 23, the cylinder 2
2 and the cylinder head 23 are cooled, so that the piston 2
Heat generated by the cylinder 22 and the cylinder head 23 due to one reciprocating motion can be effectively suppressed. In particular, since the fins 41 are provided on the cylinder head 23, the heat radiation effect is further enhanced.

As described above, according to the above-described embodiment, the second air intake holes 31, 31.
Inside, the intake hole 30 of the motor housing 9 and the second intake hole 3
By forming the air passage 36 that connects and separates 1, 31,... Inside the housing 5, the high-temperature air inside the housing 5 is not taken in even if the housing 5 accommodates the components. In addition, since low-temperature air outside the housing 5 can be always introduced, the motor 2 can be effectively cooled. Further, since the second intake holes 31 and 31 are required to be minimum, the dustproof effect of the housing 5 can be maintained. Further, the air passage 36 is connected to the rib 32 on the housing 5 side,
32 and the rib 35 on the side of the motor housing 9 are formed by abutting each other, and the sponge ring 34 is interposed between the abutting ends of the ribs 32 and 32 and the rib 35, so that the dimensions of the motor housing 9 and each rib are The air path 36 can be reliably partitioned in the housing 5 by absorbing tolerances and assembly errors. Further, internal vibrations generated in the motor 2, the air compressor 3, etc. can be absorbed to prevent the transmission of vibrations to the housing 5.

On the other hand, in the air compressor 3, the second exhaust hole 4
The exhaust cover 43 formed with the holes 5 and 45, the duct 39 and the cylinder head 23 partition and connect the exhaust hole 38 on the motor housing 9 side and the second exhaust hole 45 on the housing 5 inside the housing 5. By providing the two air passages 46, it is possible to prevent the temperature of the motor 2 and the air compressor 3 from rising due to stagnation of air after cooling the motor 2. In particular,
Since the second air passage 46 is formed along the air compressor 3 such as the cylinder 22 and the cylinder head 23, the motor 2
Cylinder 22 that easily generates heat by using the air after cooling
The temperature rise can be effectively suppressed by cooling the cylinder head 23 and the like.

The air passage is formed by abutting cylindrical bodies (ribs 32, 35) projecting from both the motor housing 9 and the half housing 7 as in the above-described embodiment. A cylindrical body that protrudes from only one side and an elastic body such as a sponge ring that receives the tip of the cylindrical body on the other side, or the elastic body is eliminated to make the cylindrical body a bellows, The elasticity capable of absorbing the error may be given to itself. Also, it is preferable that the fins be provided upright on the lower surfaces of the cylinder 22 and the cylinder head 23 surrounded by the duct 39 also in the second air passage since the heat radiation effect of the cylinder 22 and the cylinder head 23 is further enhanced. Of course, if it is not necessary to cool the air compressor such as the cylinder head, the second air passage can be formed by a cylindrical body such as an independent bellows. In this case, since it is not necessary to provide the second exhaust hole in the motor housing at the shortest distance from the exhaust hole of the motor housing, it is only necessary to provide the second exhaust hole to connect the cylindrical body.

[0016]

According to the first aspect of the present invention, the second air intake hole is formed in the vicinity of the air intake hole in the housing, and the air intake hole and the second air intake hole are partitioned in the housing inside the housing. By providing an air passage to connect, even if the component is housed in the housing, it is possible to always introduce the low-temperature air outside the housing without taking in the high-temperature air inside the housing. Can be performed effectively. Further, since the second intake hole is required to be a minimum, the dustproof effect of the housing can be maintained. According to the second aspect of the present invention, in addition to the effect of the first aspect, the air passage is formed by a tubular body projecting from the motor housing and / or the housing and connecting the intake hole and the second intake hole. By forming the elastic member at the connecting portion of the cylindrical body, it is possible to absorb the dimensional tolerance and assembly error of the motor housing and each rib, and to reliably define the air passage in the housing. Further, the internal vibration generated in the motor, the air compressor and the like can be absorbed to prevent the transmission of the vibration to the housing. According to the invention described in claim 3, in addition to the effect of claim 1 or 2, a second exhaust hole is formed in the housing,
By forming a second air passage in the housing that connects and separates the exhaust hole of the motor housing and the second exhaust hole inside the housing, it is possible to prevent a rise in the temperature of the components due to stagnation of air after cooling the motor. Becomes

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view of a compressor.

FIG. 2 is a cross-sectional view of the compressor in a lateral direction as viewed from a front side of a cylinder head.

FIG. 3 is an exploded perspective view of the compressor as viewed from the front side of the motor.

FIG. 4 is a perspective view of a motor and an air compressor.

FIG. 5 is an explanatory view of a duct (an upper surface shows a flat surface, and a lower surface shows a side surface).

FIG. 6 is an explanatory cross-sectional view in the longitudinal direction of the compressor as viewed from the front side of the motor.

[Explanation of symbols]

1. Compressor, 2. Motor, 3. Air compressor, 4. Accumulator tank, 5. Housing, 6, 7.
Half housing, 9 motor housing, 11 output shaft, 13 cooling fan, 14 crank housing, 15 spindle, 21 piston, 23
・ Cylinder head, 30 ・ ・ Intake hole, 31 ・ ・ Second intake hole, 32, 35 ・ ・ Rib, 34 ・ ・ Sponge ring, 3
6 air passages, 38 exhaust holes, 39 ducts, 41
.. Fins, 43... Exhaust cover, 45... Second exhaust hole, 46.

Claims (3)

[Claims] A motor housed in a motor housing, an air compressing unit for compressing air by obtaining a driving force from the motor, and a pressure accumulating tank for accumulating compressed air from the air compressing unit. A compressor provided with an intake hole for taking in air outside the motor housing as the motor rotates, and an exhaust hole for exhausting air in the motor housing, the housing being near the intake hole in the housing. A second intake hole is formed in the housing, and an air passage is formed in the housing to partition and connect the intake hole and the second intake hole inside the housing. 2. An air passage is formed by a tubular body projecting from a motor housing and / or a housing and connecting an intake hole and a second intake hole, and an elastic body is interposed at a connection portion of the tubular body. The compressor according to claim 1, wherein 3. A second exhaust hole is formed in a housing, and an exhaust hole of a motor housing and the second exhaust hole are formed in the housing.
A second connecting and partitioning the exhaust hole inside the housing;
The compressor according to claim 1 or 2, wherein an air passage is formed.