JP2003065218A - Small pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce and assemble the number of part items of a driving shaft part among a driving mechanism with simple constitution. SOLUTION: This small pump has a crank body and a driving body having a driving shaft integrally formed of the same material, and is constituted so that the driving shaft is rotatably installed in a bearing part of the driving body, and the driving mechanism is simply constituted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small pump.

[0002]

2. Description of the Related Art A conventional small pump will be described by taking a diaphragm pump shown in FIG. 4 as an example.

In FIG. 4, 1 is a motor and 2 is a motor 1.
3, an output shaft 3 is a crank body fixed to the output shaft 2, a drive shaft 4 is attached to the crank body 3 while being inclined, and a drive body 5 is composed of a plate-shaped portion 5a and a bearing portion 5b. 5
It is attached by inserting the drive shaft 4 into b so as to be slidable and rotatable. 6 is a ball, 7 is a case, and 8 is a cylinder part.

Further, 10 is a diaphragm main body, 11 is a diaphragm portion, and 12 is a driving portion (piston portion) which is integrally formed with the diaphragm portion 11 and is attached to the plate-like portion 5a of the driving body 5 as shown in the figure. , 13 is a discharge valve formed integrally with the diaphragm portion 11, 14 is a pump chamber, and 15 is a lid, which is composed of a discharge port 16, a common chamber (valve chamber) 17, a suction port 18, and the like. Reference numeral 19 is a suction valve attached to the lid 15.

In this conventional small-sized pump, the crank body 3 is rotated by the rotation of the output shaft 2 driven by the motor 1, and when the crank body 3 is rotated, the drive shaft 4 tilted and attached thereto is The inclination direction, that is, the inclination direction with respect to the extension line of the output shaft 2 changes. The drive body 5 also changes its inclination by such movement of the drive shaft 4. That is, the inclination direction of the plate-shaped portion 5a of the driving body 5 changes. Due to the change in the inclination of the plate-shaped portion 5a of the driving body 5, the driving portion (piston portion) 1 attached to this is changed.
2 reciprocates to change the volume of the pump chamber 14, whereby the suction valve 19 is opened to allow the fluid to flow in through the suction port 18, and the fluid flowing into the pump chamber 14 is opened in the discharge valve 13 and opened in the valve chamber 17. A pumping action of supplying through the discharge port 16 is performed.

[0006]

In the compact pump having such a structure, the driving shaft 4 of the driving mechanism is mounted on the crank body 3 by forming an inclined mounting hole in the crank body 3. It is performed by press-fitting the drive shaft 4 into.

Therefore, it is necessary to form an inclined relatively long hole at an accurate position of the crank body 3, and it is necessary to press-fit the drive shaft 4 into this hole.

As described above, the crank body 3, the drive shaft 4, etc. are required as the portion to be attached to the output shaft 2 of the motor 1.
It has a large number of parts and a large number of processes for assembling and assembling the crank body and the like as described above, which is disadvantageous in that the cost is particularly high.

According to the present invention, the number of parts of the drive mechanism is small,
Further, the present invention provides a small pump having a configuration capable of reducing the number of processing and assembling steps.

[0010]

The small pump of the present invention comprises:
The crank body fixed to the output shaft of the motor, the drive shaft fixed to the crank body and arranged to be inclined with respect to the rotation surface of the crank body (with respect to the extension line of the output shaft), A drive mechanism including a drive body and the like, which has a bearing portion into which the shaft is inserted, and has a substantially plate-like portion that is oriented at a right angle to the direction of the drive shaft. One or a plurality of drive parts (piston parts) are attached in the vicinity of the peripheral part of the substantially plate-shaped part of the drive part of the mechanism, and pump chambers are provided at the positions where the respective drive parts are located. When the motor is driven, the output shaft rotates to rotate the crank body, and the rotation of the crank body changes the tilting direction of the drive shaft fixed to the crank body. Drive section (pist Part) to reciprocate, thereby utilizing the change in the volume of the pump chamber to perform a pumping action. Among the members constituting the drive mechanism, the crank body and the drive shaft are integrally made of the same material. It is characterized by being formed. That is, the main body, which is a portion for fixing the crank body to the output shaft, and the drive shaft extending obliquely with respect to the output shaft from the main body are made of the same material and are configured as one component.

Further, the small pump of the present invention is characterized in that the tip end surface of the drive shaft of the crank body of the drive mechanism is formed into a convex curved surface.

Further, the compact pump of the present invention is characterized in that the innermost surface of the bearing portion of the driving body is a convex curved surface.

Further, the small-sized pump of the present invention is characterized in that both the tip end surface of the drive shaft of the crank body and the innermost surface of the bearing portion of the drive body in the drive mechanism have convex curved surfaces.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a small pump of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. In the figure, 1 is a motor, 2 is an output shaft of the motor 1, 20 is a crank body fixed to the output shaft 2, and 5 is a drive. Body, 7 case, 8 cylinder part, 10 diaphragm body, 11 diaphragm part, 12 drive part (piston part), 13 discharge valve, 14 pump chamber, 15 lid,
16 is a discharge port, 17 is a common chamber, 18 is a suction port, and 19 is a suction valve.

The small pump according to the embodiment of the present invention is
As described above, the drive mechanism has a feature, and in particular, FIG.
The crank body 20 in which the crank body 3 and the drive shaft 4 in the conventional example as shown in FIG.

The crank body 20 is composed of a main body 21 attached to the output shaft 2 and a drive shaft 22 extending obliquely from the main body 21 as one component made of the same material. If formed as a part, the crank body 20 can be manufactured very easily.

The structure of parts other than the crank body is substantially the same as that of the conventional small-sized pump of this type.

In the embodiment of the present invention shown in FIG. 1, the front end surface 23 of the drive shaft 22 of the crank body 20 is a convex surface, but it is similar to the front end surface 4a of the conventional drive shaft 4 shown in FIG. It may be flat.

It is preferable to make the tip end surface of the drive shaft 22 of the crank body 20 a convex surface (a convex hemispherical surface or a curved surface of another convex shape) because wear can be reduced. Therefore, in the case of a flat surface, it is preferable to use a ball like that shown in FIG.

The small pump of the embodiment shown in FIG. 1 has two pump chambers and therefore two pistons, but it may have only one. Further, it may be three or more.
Further, when the plurality of pump chambers are formed by the piston portions provided respectively, it is desirable that each piston portion is arranged on the circumference around the drive shaft. Further, it is preferable that the piston portions are arranged at a constant equal interval.

Since the compact pump of the present invention is constructed as described above, the crank body 20 rotates about the output shaft 2 when the output shaft 2 is rotated by the drive of the motor 1, and the drive shaft 22 of the crank body 20 rotates. The part continuously changes its inclination direction to perform the pumping action similar to the conventional example. That is, due to the reciprocating movement of the driving portion (piston portion) 12 attached to the substantially plate-shaped portion due to the movement of the driving body,
The same pump function as the pump shown in FIG.

FIG. 2 is a diagram showing an example of the shapes of the tip portion of the drive shaft of the crank body and the bearing portion of the drive body.

In FIG. 2, (A) shows that the front end surface 23A of the drive shaft 22 of the crank body 20 and the innermost surface 24A of the bearing member 5b of the drive body 5 are both flat, and (B) shows the drive shaft 22.
When the tip end surface 23B of the above is a convex curved surface and the innermost surface 24A of the bearing portion 5b of the driving body 5 is a flat surface, (C) is the crank body 2
The front end surface 23A of the 0 drive shaft 22 is a flat surface, and the innermost surface 24B of the bearing portion 5b of the drive body 5 is a convex curved surface,
(D) shows a case where the tip end surface 23B of the drive shaft 22 of the crank body 20 is a convex curved surface, and the innermost surface 24B of the bearing portion 5b of the drive body 5 is a curved surface.

As shown in these FIG. 2, the surface 23A or 2
3B and the surface 24A or 24B are configured to be in contact with each other.

The surfaces 23B and 24B are both hemispherical surfaces or curved surfaces other than hemispherical surfaces, but are not limited to these as long as they are convex. However, it is desirable that the surface is smooth.

Next, a second embodiment of the small pump of the present invention will be described.

FIG. 3 shows a second embodiment of the present invention. In this figure, 1 is a motor, 2 is an output shaft, 3 is a crank body, 30 is a drive body, 7 is a case, and 8 is a cylinder. , 10 is a diaphragm body, 11 is a diaphragm part, 12 is a drive part, 13 is a discharge valve, 14 is a pump chamber, 1
5 is a lid, 16 is an outlet, 17 is a valve chamber, 18 is an inlet,
Reference numeral 19 is an intake valve.

The small pump of the second embodiment is different from that of the first embodiment in that the driving body 30 is characterized. That is, this drive body is formed by integrally forming a substantially plate-shaped portion 31 and a drive shaft 32 with the same material, and is formed by inclining the tip portion 32a of the shaft 32 to the crank body 3 (output). Mounting hole 3 inclined to the axis
It is characterized in that it is inserted into a and is attached rotatably.

In the small-sized pump of the second embodiment, the crank body is rotated by the rotation of the output shaft 2 driven by the motor 1. When the crank body 3 rotates in this manner, the drive shaft 32 of the drive body 30 attached to the crank body 3
32a of FIG. 3 makes a circular motion to change the inclination direction of the shaft 32, and the inclination direction of a substantially plate-shaped portion 31 extending in a direction perpendicular to the shaft 32 also changes, and the diaphragm portion 11 attached thereto The driving unit 12 of the reciprocating motion,
The pump action is performed by the same action as that of the first embodiment.

In the embodiment shown in FIG. 3, the drive shaft 3
The tip end surface 33 of 2 is a convex curved surface, and the innermost surface of the mounting hole 3a formed in the crank body 3 which is in contact with this is a flat surface. The innermost surfaces of the body may be flat. The surface of the mounting hole may be a convex curved surface, and the tip end surface of the drive shaft may be a flat surface, or both surfaces may be convex curved surfaces.

The small-sized pump of the second embodiment has the drive shaft and the drive body of the conventional example shown in FIG. 4 integrated with each other, and therefore the number of parts can be reduced.

The compact pump of the present invention is characterized by the structure of the drive mechanism, and therefore the structure of the pump chamber other than the drive mechanism is not limited to the structure shown in FIG. That is, any pump may be used as long as it is a pump such as the drive mechanism in the pump of the present invention, which performs the pumping action by the reciprocating movement of the piston portion by the movement of the driving body.

[0034]

The small pump of the present invention has a small number of parts because the main body for fixing the crank body of the drive mechanism to the output shaft and the drive shaft extending from the main body are formed as an integral part made of the same material. In addition, the number of steps for assembling and the like can be reduced and the cost can be reduced, and the durability of the drive mechanism can be increased by integrally forming a portion of the drive mechanism which has a relatively large load during operation. The same effect can be obtained even if the drive body is integrally formed with the drive shaft so that the drive shaft of the drive body is inserted into the mounting hole provided in the crank body so as to be rotatable.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a small pump of the present invention.

FIG. 2 is a diagram showing a configuration of a connecting portion between a crank body of a pump of the present invention and a bearing portion of a driving body.

FIG. 3 is a diagram showing a second embodiment of a small pump of the present invention.

FIG. 4 is a diagram showing a configuration of a conventional small pump.

[Explanation of symbols]

1 motor 2 output shaft 5 driver 20 crank body 30 driver

Continued front page    F-term (reference) 3H070 AA00 CC07 CC31 CC32 CC35                       DD31                 3H071 AA00 BB05 CC26 CC31 CC32                       CC34 DD04 DD12 DD13 DD42                 3H075 AA00 BB04 BB16 CC32 CC33                       CC35 DA05 DA06 DB22                 3H077 AA00 CC02 CC07 CC13 DD02                       DD12 EE23 EE34 EE35 EE37                       FF01 FF06 FF12 FF22

Claims (4)

[Claims] 1. A motor, an output shaft of the motor, a main body fixed to the output shaft, and a drive shaft extending from the main body in a direction inclined with respect to the output shaft or an extension thereof are made of the same material. And a bearing portion that is slidably and rotatably inserted into the crank body drive shaft, and a substantially plate-shaped portion that is positioned at a right angle to the drive shaft of the crank body. A drive unit, one or a plurality of piston units fixed near the periphery of the drive unit, and one or a plurality of pump chambers in which the piston units are located are provided, and are driven by the motor. The pump reciprocates by changing the inclination direction of the drive shaft by the rotation of the crank body accompanying the rotation of the output shaft to change the inclination of the substantially plate-shaped portion of the drive body. Room content A small pump that changes the product and operates as a pump. 2. A small pump, wherein at least one of the tip end surface of the drive shaft of the crank body and the innermost surface of the bearing portion of the drive body is a convex curved surface. 3. A motor, an output shaft of the motor, a crank body fixed to the output shaft and having a mounting hole formed to be inclined with respect to the output shaft, a drive shaft and the drive shaft. A drive body that is formed of a substantially plate-shaped portion that is positioned at a right angle and has the drive shaft rotatably inserted into a mounting hole of the crank body, and one or a plurality of drive bodies that are fixed near the periphery of the drive body. A direction in which the drive shaft is inclined by the rotation of the crank body accompanying the rotation of the output shaft due to the drive of the motor, and the piston part and one or a plurality of pump chambers in which the respective piston parts are located. By changing the inclination of a substantially plate-shaped portion of the driving body to reciprocate each piston portion to change the volume of the pump chamber and perform a pumping action. 4. A small pump, wherein at least one of the innermost surfaces of the mounting holes formed in the drive shaft and the crank body is a convex curved surface.