JP3324733B2 - Pump mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump mechanism of a type in which two pumps for vacuum, blower and the like are driven by one electric motor.

[0002]

2. Description of the Related Art In a printing machine and the like, a pump mechanism that uses a single electric motor to drive two pumps in a belt is used.

In this conventional pump mechanism, two pumps and an electric motor for driving the two pumps are mounted side by side on one surface of a base.

The rotary shafts of the two pumps and the drive shaft of the electric motor are arranged side by side in parallel. Pulleys are fitted on the rotating shafts of the two pumps, respectively. Two drive wheels are fitted on the drive shaft of the electric motor. A pulley of one pump is connected to one drive wheel of the electric motor via a belt. A pulley of the other pump is connected to the other drive wheel of the electric motor via a belt. Then, the rotational force of the drive shaft of the electric motor is reduced to 2
Transmission can be made to the rotating shafts of the two pumps via two drive wheels, two belts, and two pulleys.

[0005] A portion where the belt, which is a source of vibration and noise, circulates and the periphery of the pump are covered with a case or a cover having a damping action. Then, the vibration and noise are prevented from leaking to the outside of the case or the cover.

[0006]

However, in the above-mentioned pump mechanism, the base occupying the two pumps and the electric motor has a large occupied area, and it is difficult to mount the pump mechanism in a printing machine or the like which is intended to be miniaturized. Mastered.

Further, parts such as carbon vanes, bearings, belts and the like, which are easily worn by the pump used in the pump mechanism, need to be periodically replaced. It was necessary to separate from the base equipped with. In addition, the pump whose parts such as vanes and bearings have been replaced needs to be re-attached to the base, and in this case, the pump rotation axis is arranged in parallel with the drive shaft of the electric motor mounted on the base. The pump had to be positioned with respect to the base. for that reason,
The maintenance work of the pump mechanism required a great deal of work and time.

Further, a case or cover having a complicated structure and having a vibration damping action, which covers the periphery of a pump and a belt, which are sources of vibration and noise, makes it difficult to assemble the pump mechanism, The mechanism was made expensive.

The same applies to various pump mechanisms of a type in which two dry or wet pumps, such as a vacuum pump and a blower pump, are driven by a single electric motor in a belt manner.

The present invention can solve such problems.
It is intended to provide a pump mechanism.

[0011]

In order to achieve the above object, a pump mechanism according to the present invention mounts two pumps on one surface of a first base such that the rotation axes of the pumps are arranged in parallel. Then, a second base on which the electric motor is mounted is arranged on the other surface side of the first base, and one end of the second base is arranged in parallel with the rotation axis of the pump and the drive axis of the electric motor. Holding means for swingably supporting the first base via a shaft, and holding the second base in a state of swinging at a predetermined angle with respect to the first base about the shaft, A belt is wound around a triangular loop around a pulley fitted to the rotating shafts of the two pumps and a drive wheel fitted to the drive shaft of the electric motor.

In this pump mechanism, since two pumps and one electric motor are arranged so as to face one surface side and the other surface side of the first base, the two pumps and one electric motor are arranged. The exclusive space with the electric motor can be narrowed.

When replacing parts such as vanes, bearings and belts of the pump, the holding means is released and the first
The swing angle of the second base with respect to the base can be reduced, and the drive wheels of the electric motor can be made closer to the pulley of the pump. Then, the belt wound around the pulley and the drive wheel can be removed from around the belt. Then, replacement of parts such as vanes and bearings of the pump mounted on the first base can be performed without changing the mounting position of the pump on the base while the pump is mounted on the first base. it can.

Further, with the holding means released, the second base is swung wide and narrow with respect to the first base to easily and quickly exchange the belt wound around the pulley and the drive wheel. be able to.

Also, compared with a belt wound around a flat elliptical loop over one pump pulley and one electric motor drive wheel, two pump pulleys and one A belt that is wound in a substantially triangular loop shape over the drive wheels of the electric motors can be formed to be long. And 2
The amount of change in the tension applied to the belt with respect to the adjustment amount of the distance between the shafts of one pump and one electric motor can be reduced. Further, the allowable range of the tension applied to the belt with respect to the adjustment amount of the distance between the shafts of the two pumps and the one electric motor is widened, so that the belt tension can be easily adjusted. At the same time, the ratio of the contact length of the belt to the pulley and the drive wheel per one circumference of the belt can be reduced by the length of the belt, and the durability of the belt can be increased.

Further, the two pumps are connected to one surface of the first base via a belt wound in a substantially triangular loop shape over the pulleys of the two pumps and the driving wheels of the one motor. Side, and the electric motor is configured to press the other surface side of the first base, so that the first base is connected to one surface side by two pumps and motors connected via a belt. Only by being pushed, the first base can be prevented from bowing. In addition, the surface area of the first base can be reduced and the rigidity of the first base can be increased by eliminating the electric motor from one surface side of the first base on which the pump is mounted.

In the pump mechanism of the present invention, the first base is connected to the pump, the pulley, the electric motor,
It is preferable that the driving wheel and the belt are fixed to the frame of the soundproof cabinet that houses the belt.

In this pump mechanism, the elastic body can prevent the vibration and noise of the pump, the pulley, the electric motor, the drive wheels and the belt from being transmitted directly to the soundproof cabinet via the frame. And it is possible to prevent the vibration and noise from leaking out of the soundproof cabinet.

[0019]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a preferred embodiment of the pump mechanism of the present invention, and FIG. 1 is a front view showing a schematic structure thereof. Hereinafter, this pump mechanism will be described.

In the figure, 10a and 10b are two pumps such as two vacuum pumps of a dry system. Two pumps 1
Reference numerals 0a and 10b are mounted on one surface side of the first base 20 so that the rotation shafts 14 of the pump are arranged in parallel.
The first base 20 is formed by bending a steel plate.

On the other surface side of the first base 20, a second base 40 on which the electric motor 30 is mounted is arranged.
The second base 40 is formed by bending a steel plate. One end of the second base 40 is connected to the pumps 10a, 10b
The first base 20 is supported via a shaft 50 so as to be able to swing in a wide and narrow manner so that the rotary shaft 14 and the drive shaft 34 of the electric motor 30 are arranged in parallel.

The rotary shafts 14 of the two pumps 10a and 10b mounted on the first base 20 and the drive shaft 34 of the electric motor 30 mounted on the second base 40 are substantially perpendicular to the direction of gravity. It is arranged almost horizontally.

Reference numeral 60 denotes holding means for holding the second base 40 in a state of swinging at a predetermined angle with respect to the first base 20 about the shaft 50.

The holding means 60 includes an arc-shaped elongated hole 62 penetrating the surface of the upright wall 42 on the second base side, and a fastening screw inserted through the elongated hole 62 into the upright wall 22 on the first base side. A bolt 64 and a bolt 68 screwed into a nut 66 fixed to the surface of the second base 40, the tip of which penetrates through the second base 40 and abuts on the back surface of the first base 20. Make up.

Then, by loosening the tightening bolt 64 and moving the tightening bolt 64 back and forth in the arc-shaped elongated hole 62, the second base 40 is widened and narrowed about the shaft 50 with respect to the first base 20. You can make it swing. Further, the swing angle of the second base 40 with respect to the first base 20 can be adjusted widely by rotating the bolt 68 in the nut 66 in the forward and reverse directions. Then, the second base 40 is pressed against the first base 20 by tightening the tightening bolt 64 to press the upright wall 42 of the second base side against the surface of the upright wall 22 of the first base side. It can be held in a state of swinging at an angle.

The rotary shaft 14 of the two pumps 10a and 10b
Are fitted with the pulleys 12a and 12b, respectively. A drive wheel 32 is fitted on a rotating shaft 34 of the electric motor 30. A belt 70 made of rubber or the like is wound around the pulleys 12 a and 12 b and the drive wheel 32 in a substantially triangular loop shape. Then, the rotational force of the drive shaft 34 of the electric motor 30 is transmitted to the drive wheel 32, the belt 70, and the pulley 1.
The power can be transmitted to the rotary shafts 14 of the two pumps 10a and 10b via 2a and 12b, respectively.

In addition, in the illustrated pump mechanism, a first base 20 on which two pumps 10a and 10b are mounted, a second base 40 on which an electric motor 30 is mounted, a belt 70, pulleys 12a and 12b, driving wheels 32, Aftercooler 10 for cooling compressed air discharged from pumps 10a and 10b
1. A muffler 102, a suction case 103 containing a filter (not shown), a vacuum case 104, a delivery case 105 for piping, and the like are collectively housed in a box-shaped soundproof case 100. Then, the vibration and noise are prevented from leaking out of the soundproof cabinet 100. After cooler 10
1. Silence muffler 102, suction case 103, vacuum case 104, delivery case 10 for piping
5 and the like are fixed to and supported by the body of the pumps 10a and 10b housed in the soundproof case 100 via a piping material or a support frame (not shown).

The first base 20 on which the pumps 10a and 10b are mounted is fixed to a frame 90 having a U-shaped cross section disposed inside the soundproof cabinet 100 via an elastic body 80 made of rubber or the like. I have. And the pump 10
a, 10b, the electric motor 30, the belt 70, and the like are transmitted directly to the soundproof cabinet 100 via the frame 90 to prevent the vibration and noise from leaking out of the soundproof cabinet 100.

The pump mechanism shown in FIGS. 1 and 2 is constructed as described above. In this pump mechanism, two pumps 10a and 10b and one electric motor 30 are connected to the first base 20. The two pumps 10a, 10b and 1 are disposed so as to face each other on one surface side and the other surface side.
The exclusive space with the electric motors 30 can be reduced.

When replacing parts such as vanes, bearings and belts of the pumps 10a and 10b, the tightening bolt 64 of the holding means 60 is loosened and the bolt 6
By rotating the nut 8 in the nut 66 in the reverse direction, the second base 40 can be swung about the shaft 50 in a direction approaching the first base 20. Then, the drive wheels 32 of the electric motor
Can be brought closer to the pulleys 12a and 12b of the pump. Then, the belt 70 wound around the pulleys 12a and 12b and the drive wheel 32 can be removed from the periphery thereof. Replacement of parts such as vanes and bearings of the pumps 10a and 10b is performed with the pumps 10a and 10b.
In a state where b is attached to the first base 20, the operation can be easily performed without being hindered by the belt 70.

In a state where the holding means 60 is released, the second base 40 is swung wide and narrow with respect to the first base 20, and the belt 70 wound around the pulleys 12 a and 12 b and the driving wheel 32. Can be easily exchanged.

Also, as described above, the pumps 10a,
After the replacement of the parts such as the vane, the bearing, and the belt 70 of 10 b is completed, the second base 40 can be swung in a direction away from the first base 20 by rotating the bolt 68 forward in the nut 66. And pulley 1
The distance between 2a, 12b and drive wheel 32 can be increased to add tension to belt 70 wrapped around them. At the same time, the tightening bolt 64 is tightened to press the upright wall 42 of the second base side against the surface of the upright wall 22 of the first base side, and the second base 40 is set at a predetermined angle with respect to the first base 20. Can be held so as not to move in the state of swinging. And the belt 70 is connected to the pulley 1
2a, 12b and the slip around the drive wheel 32, the torque of the drive wheel 32 of the electric motor is reduced by the belt 70.
Can be accurately transmitted to the pulleys 12a and 12b of the pump.

In this case, since the belt 70 wound around the pulleys 12a and 12b and the driving wheel 32 in a substantially triangular loop is long, the allowable range of the tension applied to the belt 70 is widened. 70 can be easily adjusted.

The pumps 10a and 10b and the pulley 12
a, 12b, electric motor 30, drive wheel 32 and belt 7
The elastic body 80 can prevent vibrations and noises such as 0 from being transmitted directly to the soundproof cabinet 100 via the frame 90. Then, it is possible to prevent the vibration and noise from leaking out of the soundproof cabinet 100.

FIG. 2 shows another preferred embodiment of the pump mechanism of the present invention, and FIG. 2 is a front view showing a schematic structure thereof. Hereinafter, this pump mechanism will be described.

In the illustrated pump mechanism, the first base 20 is
In the soundproof cabinet 100, it is arranged to stand almost vertically. Two pumps 10a and 10b are mounted on one surface of the first base 20 side by side. On the other surface side of the first base 20,
The second base 40 on which the electric motor 30 is mounted is arranged. The rotating shafts 14 of the two pumps 10a and 10b and the driving shaft 34 of the electric motor 30 are arranged side by side in a substantially horizontal direction, which is substantially perpendicular to the direction of gravity.

At the lower end of the first base 20, an arm 24 made of a steel material is integrally extended. Then, the arm 24 is fixed to a frame 90 attached to the side wall of the soundproof box 100 via an elastic body 80 made of a rubber material or the like.

In other respects, the configuration is the same as that of the above-described pump mechanism shown in FIG. 1. The usage example and operation thereof are also the same as those of the above-described pump mechanism, and description thereof will be omitted.

The pump mechanism of the present invention can also be used for various pump mechanisms of a type in which two dry or wet pumps for vacuum, blower, etc. are driven by one electric motor via a belt. It is possible.

[0040]

As described above, according to the pump mechanism of the present invention, the exclusive space between the two pumps and one electric motor is reduced, and the pump mechanism can be mounted in a miniaturized printing machine or the like. A pump mechanism can be provided.

Further, it is possible to adjust the tension of the belt wound around the drive wheel of the electric motor and the pulley of the pump and to easily replace the belt. At the same time, the ratio of the contact length of the belt to the drive wheel and the pulley per one belt rotation can be reduced, and the durability of the belt can be improved.

Also, while the pump is still attached to the first base, parts such as the vanes and bearings of the pump can be replaced. During maintenance work on the pump, the pump can be removed from the first base. This eliminates the need to remount the pump to the first base or perform troublesome positioning of the pump with respect to the first base and the electric motor.

Further, it is possible to prevent the first base from warping due to the tension acting on the belt wound around the drive wheel of the electric motor and the pulley of the pump. At the same time, the electric motor is eliminated from the first base to which the two pumps are attached, so that the first base can be downsized. Then, the rigidity of the first base can be increased.

Further, since the two pumps are mounted together on the common first base, the parallelism of the rotation axes of the two pumps can be easily and accurately determined, and the positioning of the two pumps with respect to the first base can be easily achieved. Work can be performed easily and accurately.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic structure of a pump mechanism of the present invention.

FIG. 2 is a front view showing a schematic structure of a pump mechanism of the present invention.

[Explanation of symbols]

 10a, 10b Pump 12a, 12b Pulley 14 Pump rotation axis 20 First base 22 First base side upright wall 30 Electric motor 32 Drive wheel 34 Electric motor drive shaft 40 Second base 42 Second base side upright Wall 50 shaft 60 holding means 62 long hole 64 fastening bolt 66 nut 68 bolt 70 belt 80 elastic body 90 frame 100 soundproof cabinet

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-6-346881 (JP, A) JP-A-6-34186 (JP, A) JP-A-4-350380 (JP, A) JP-A-4- 171276 (JP, A) Fully open 1988-156490 (JP, U) Fully open sho 59-180174 (JP, U) Fully open sho 59-168535 (JP, U) Fully open sho 59-190981 (JP, U) Special Table Hei 9-502502 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04B 41/00 F04C 23/00

Claims (2)

(57) [Claims] 1. A pump comprising: two pumps mounted on one surface of a first base such that rotation axes of the pumps are arranged in parallel; and an electric motor mounted on the other surface of the first base. 2
A base is arranged, and one end of the second base is arranged such that the rotation axis of the pump and the drive axis of the electric motor are arranged in parallel.
Holding means for swingably supporting the first base via an axis, and holding the second base in a state of swinging at a predetermined angle with respect to the first base about the axis; Over the pulleys fitted respectively to the rotary shafts of the pumps and the drive wheels fitted to the drive shafts of the electric motors,
A pump mechanism comprising a belt wound around a triangular loop. 2. The pump mechanism according to claim 1, wherein the first base is fixed to a frame of a soundproof cabinet containing a pump, a pulley, an electric motor, a driving wheel, and a belt via an elastic body.