JP2952866B1 - Reciprocating pump - Google Patents

Abstract

An object of the present invention is to reduce the number of parts for supporting a pump to reduce costs. A reciprocating pump has a hollow support shaft attached to a main body thereof, a slide shaft is inserted into a hollow portion of the support shaft, and both ends of the support shaft are supported to support reciprocation of the reciprocating pump. Absorbs vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a reciprocating pump having a bellows which reciprocates by driving air.

[0002]

2. Description of the Related Art Conventionally, as a pump of this type, for example, as shown in FIG. 4, a reciprocating pump comprises a cylindrical cylinder 51 and cylinder heads 52 arranged at both ends of the cylinder 51. . Outside of this cylinder 51,
A plurality of slide cylinders 53 are arranged to connect between the two cylinder heads 52,52. Further, an interlocking shaft 54 is fitted into the slide cylinder 53, and the interlocking plates 5 are provided at both ends of the interlocking shaft 54, respectively.
5, 55 are attached by mounting bolts 56.

In the cylinder 51, a pair of pistons 57, 57 arranged opposite to each other are arranged, and each of the pistons 57 has a shaft 58 extending inward from the center of the interlocking plate 55. 4, a pump shaft 59 that can reciprocate in the left-right direction and a shaft plate 60 attached to an end of the pump shaft 59 are provided. The piston 57 has one end attached to the shaft plate 60 by a mounting bolt 61 and the other end supported by a bellows body 63 fixed to the pump head 62 by welding. 57 can reciprocate in the left-right direction in FIG.

[0004]

As shown in FIG. 5, a plurality of bellows tightening a plurality of bellows extending in the left-right direction are generally provided on outer frames 70, 70 disposed at both ends, as shown in FIG. It is supported by a long bolt 64 for use. A slide shaft 65 extends from the frames 70, 70 in parallel with the long bolt 64.
As shown in FIG. 6, one of the frames 70, 70
And a hollow slide cylinder 65b which can slide reciprocally with respect to the solid support shaft 65a.

Therefore, a slide shaft 65 must be separately provided as a pump support mechanism in addition to the plurality of interlocking shafts 64, 64,..., Which complicates the pump support structure and is preferable in appearance. There was a problem that there was no. In view of the above, the present invention has been made in view of the above problems, and has as its object to provide a pump supporting structure which has a small number of parts for supporting a pump and has a compact structure and a good design. And

[0006]

In order to solve the above-mentioned problems, the present invention adopts a method in which a hollow support shaft is attached to a reciprocating pump body and connected to a bellows via an interlocking plate.
The slide shaft brought transmural inserted into the hollow portion of the support shaft structure
Made which are, the support shaft, I'll be supporting the both ends thereof, with function for fixing the housing, the
Supports the slide shaft that reciprocates with the bellows
With the function, the slide shaft is
The point is that it is configured to be supported by the bearing of the interlocking plate .

Accordingly, the support shaft is provided with a pump (how).
In addition to supporting a reciprocating pump (e.g., a reciprocating pump including a jig) , the pump also has a function of supporting a slide shaft for absorbing vibration of the pump. As a result, the support structure of the pump becomes compact and the number of parts is reduced. still,
The slide shaft is supported by the bearing of the interlocking plate with a slight gap between it and the interlocking plate.
When the movement of the left and right pistons is switched, vibration in the sliding direction can be absorbed by the bearing.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external perspective view of a reciprocating pump A according to the present invention. Reference numeral 1 denotes a pump A having a cylindrical portion 1a and a deep dish-shaped end portion 1b attached to both ends of the cylindrical portion 1a. External housing. A pump drive unit 2 is provided at the center of the housing 1, and a suction pipe 3 and a discharge pipe 4 are connected to the pump drive unit 2, and a fluid sucked from the suction pipe 3 is supplied to the pump drive unit 2. The pressure is increased in the pump drive unit 2 and discharged from the discharge pipe 4. Reference numeral 5 denotes a protective cover that covers the end 1b of the housing 1. FIG. 2 is a partially broken longitudinal sectional view of a central portion of the pump A, and is a disk-shaped interlocking plate 6 fixed to an end 1 b of the housing 1. As shown in FIG.
In this embodiment, a deep dish is formed at both ends of the cylindrical portion 1a.
Is provided (that is, a circle is formed by the two ends 1b).
It is configured to hold the cylindrical portion 1a), and a hollow support shaft
14 are inserted into each end 1b. Soshi
Then, both ends of the support shaft 14 may be
It is fixed with a nut 14b via a washer 14a. I
Therefore, according to the present embodiment, the housing 1 (the cylindrical portion 1)
a, the end 1b) is fixed using the support shaft 14 or the like
Thus, a reciprocating pump is configured.

In the housing 1, a pair of piston members 7, 7 facing each other are arranged. Each piston member 7 is composed of a cylindrical body 9 having a disk 8 at its tip, and the cylindrical body 9 is reciprocally fitted to a support shaft 10 extending from the center of the interlocking plate 6. ing. Thereby, the air chamber 11 which forms a closed space in the housing 1 is formed by the piston member 7, and the air chamber 11 is formed.
Then, air is supplied through an air supply pipe 12 shown in FIG.

Further, a bellows 13 which reciprocates by driving air is disposed between the disk 8 and the pump driving section 2. As a feature of the present invention, the interlocking plate 6 includes a plurality of hollow support shafts 1 extending in the left-right direction in FIG.
4 are connected to each other. This support shaft 14
As shown in FIG. 3, a slide shaft 15 is inserted through the hollow portion of the support shaft 14, and both ends of the slide shaft 15 are supported so as to support the reciprocating motion of the reciprocating pump. ing. That is, the support shaft 14 and the slide shaft 15 are provided at three places in the circumferential direction of the reciprocating pump main body so as to be supported at three points. 16 are provided.

Incidentally, the bearing 16 is provided on the interlocking plate 6 in the circumferential direction.
It is fitted with a slight gap into the concave grooves 17 formed at various locations, so that the impact of the slide shaft 15 is reduced when the pump is driven. Therefore, in the above embodiment, the reciprocating pump is configured to support the reciprocating motion of the reciprocating pump by the supporting shafts 14 arranged at three places in the circumferential direction of the reciprocating pump main body. Since the slide shaft 15 is inserted and inserted into the hollow portion of the pump 14, it functions not only as a member for supporting the pump but also as a member for absorbing vibration of the pump. as a result,
It is not necessary to provide a slide shaft for absorbing vibration of the pump in addition to the support shaft 14, so that the number of parts of the pump support structure is reduced, and the cost can be reduced.
The apparatus as a whole has a compact configuration, can realize stable reciprocating motion, and is preferable in terms of design.

[0012]

As described above, according to the reciprocating pump according to the present invention, the hollow support shaft is attached to the reciprocating pump main body, and the slide shaft connected to the bellows via the interlocking plate.
The support shaft is configured to be inserted through the hollow portion .
The support shaft supports both ends thereof ,
The bellows with the function of fixing the housing.
A function to support the slide shaft that reciprocates with
The slide shaft is provided with a slight gap,
It is configured so that is supported by the bearing. Accordingly
Thus, according to the present invention, it is not necessary to provide a separate slide shaft for absorbing the vibration of the pump in addition to the support shaft, so that the number of parts of the pump support structure is reduced and the cost of the apparatus can be reduced. At the same time, the whole apparatus becomes compact, stable reciprocating motion can be realized, and the design is favorable.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a reciprocating pump according to the present invention.

FIG. 2 is a partially cutaway view of a pump body.

FIG. 3 is a schematic sectional view taken along line AA of FIG. 2;

FIG. 4 is a central longitudinal sectional view of a conventional reciprocating pump.

FIG. 5 is a side view of an external appearance of a conventional reciprocating pump.

FIG. 6 is a diagram corresponding to FIG. 3 of a conventional reciprocating pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing 6 ... Interlocking plate 14 ... Support shaft 15 ... Slide shaft 16 ... Bearing

Claims (2)

(57) [Claims] 1. A slide shaft connected to a bellows via an interlocking plate with a hollow support shaft attached to a reciprocating pump body.
Us is constructed allowed transmural inserted into the hollow portion of the support shaft
Ri, Tsu by the said support shaft, for supporting the both end portions
The bellows with the function of fixing the housing.
A function to support the slide shaft that reciprocates with
The slide shaft is provided with a slight gap,
Reciprocating pump characterized by being supported by bearings . 2. The reciprocating pump according to claim 1, wherein the supporting shaft and the slide shaft are provided at three positions in a circumferential direction of the reciprocating pump body and supported at three points.