JPH0735782U - Reciprocating pump - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention reciprocates the connecting rod by the rotation of the eccentric shaft to operate the pumps provided at both ends of the connecting rod. The purpose is to provide a dynamic pump. The reciprocating pump of the present invention comprises two pumps arranged at intervals, a connecting rod having elongated holes connected to both pumps, a member having elongated holes fixed to the connecting rod, and And an eccentric shaft for reciprocating them arranged in the oblong hole, one inner surface of the connecting rod on the pump side is always in contact with the eccentric shaft, and the other of the oblong hole of the oval member. The inner surface on the pump side was in contact with the eccentric shaft so that no noise was generated during operation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reciprocating pump.

[0002]

[Prior art]

 8 and 9 are diagrams showing a configuration of a conventional reciprocating pump. In these figures, 1 is a drive motor, 2 is an eccentric shaft fixed to the drive shaft 1a of the drive motor 1, 3 is a ball bearing, 4 is a connecting rod, 5 is a diaphragm, and both ends of the connecting rod 4 are both of these. It is attached to the diaphragm 5. A pump chamber 6 is formed by this diaphragm.

This pump rotates the eccentric shaft 2 by driving the drive motor 1 to reciprocate the connecting rod 4, and in the figure, reciprocates in the left and right directions to deform the diaphragm 5 and pump the pump. The volume of the chamber 6 is changed to perform the pumping action.

[0004]

[Problems to be solved by the device]

 In such a conventional reciprocating pump, between the eccentric shaft 2 and the elongated hole 4a of the connecting rod 4 (actually, the bearing ring is used so that the eccentric shaft 2 can be eccentrically moved around the drive shaft 1a). There is a certain amount of clearance in the portion C or D between the outer peripheral surface of 3). Therefore, every time the eccentric shaft 2 is reciprocated by the rotation, the inner surface of the elongated hole 4a of the connecting rod 4 and the outer peripheral surface of the eccentric shaft 2 (bearing 3) collide with each other to generate noise.

The present invention relates to a reciprocating pump that reciprocates a connecting rod by rotation of an eccentric shaft and operates pumps provided at both ends of the connecting rod. The purpose is to provide.

[0006]

The reciprocating pump of the present invention is provided with a diaphragm pump, a piston pump, etc. at both ends of a connecting rod having an elongated hole, and an eccentric cam provided in the elongated hole of the connecting rod. With this configuration, the eccentric shaft is rotated to reciprocate the connecting rod to operate the pump. Similarly, a member having an elongated hole is attached to the connecting rod, and one of the elongated holes on the connecting rod side of the first pump side. Is fixed to the outer peripheral surface of the eccentric shaft so that the second pump side surface of the elongated hole of the elongated member is in contact with the outer peripheral surface of the eccentric shaft. When moving, the connecting rod is moved, and when moving to the second pump side, the connecting rod is moved through the elongated hole member so that both pumps are operated alternately.

The reciprocating pump of the present invention is configured as described above, so that when the connecting rod reciprocates due to the rotation of the eccentric shaft, the connecting rod moves toward one pump side. The eccentric shaft pushes the connecting rod directly to move to the other pump side.The eccentric shaft pushes the elongated hole member to move the connecting rod that is integrated with the elongated hole member. Since the members are in contact with the eccentric shaft on the different pump sides and have a small gap on the opposite side, the eccentric shaft can rotate, and the pressed side is always in contact with the eccentric shaft during rotation. No noise is emitted to maintain the condition.

[0008]

【Example】

 Next, an embodiment of the reciprocating pump of the present invention will be described.

1 and 2 show a first embodiment of the present invention, in which 1 is a drive motor, 2 is an eccentric shaft, 3 is a ball bearing, 4 is a connecting rod, 5 is a diaphragm, and 6 is a pump. In the chamber, these have substantially the same structure as the conventional reciprocating pump shown in FIGS. Reference numeral 11 denotes a member fixed to a recess formed in the vicinity of the elongated hole of the connecting rod 4, and an elongated hole 11a similar to the elongated hole of the connecting rod 4 is formed. Reference numeral 12 denotes another bearing provided on the eccentric shaft 2, which is attached to the long hole portion of the long hole member 11. In this embodiment, the long hole member 11 is fixed to the connecting rod with screws 13 or the like. Here, the inner surface of the elongated hole of the connecting rod is in contact with the outer peripheral surface of the bearing 3 at the portion A, as shown in FIG. 2, and the inner surface of the elongated hole of the elongated hole member 11 is the outer surface of the bearing 12 at the portion B. The connecting rod 4 and the long hole member 11 are attached so that they contact each other.

In this first embodiment, the rotation of the drive shaft 1a and the eccentric shaft 2 due to the operation of the drive motor 1 causes the connecting rod 4 to move in the left-right direction in FIGS. 1 and 2, and both pumps operate. To do. Here, when moving to the left side, the bearing 3 pushes the connecting rod 4 at the portion A, and when moving to the right side, the bearing 12 pushes the elongated hole member 11 at the portion B to perform the above movement. To do. And during the exercise, I always come into contact with part A and part B.

Therefore, the eccentric shaft 2 is always in contact with the connectin glad 4 at the portion A through the bearing 3 and has a slight gap at the other portion, and the bearing 12 at the portion B. It is in contact with the long hole member 11 via the through hole and has a slight gap with the long hole member 11 in other portions. Therefore, the eccentric shaft 2 is rotatable, and when the connecting rod 4 is moved to the left in the drawing, the connecting rod 4 is directly pressed, and the elongated hole member 11 is moved to the right to move the screw. At 13, move the connecting rod that is integrated. At that time, since the eccentric shaft 2 is in contact with the connecting rod 4 and the elongated hole member 11 (actually, the bearings 3 and 12) at the positions A and B, no noise is generated.

3 and 4 are views showing a second embodiment of the present invention, FIG. 5 is a partially cutaway view of the same embodiment, and FIG. 6 is an exploded view. FIG. 7 and FIG. 7 are views showing a part of the connectin glob. As shown in these drawings, the reciprocating pump of the second embodiment is provided with three bearings 14, 15 and 16 on the eccentric shaft 2, and a long hole member is provided in a concave portion formed in the central portion of the connecting rod 4. 11 is arranged, and the elongated hole member 11 is pressed in one direction (leftward in the illustrated embodiment) by the spring 17, so that the elongated hole member 11 is eccentric shaft at the portion B through the bearing 15. I am always in contact with 2. With this structure, the eccentric shaft 2 is always in contact with the connecting rod 4 and the long hole member 11 through the bearings 14 and 16 and the bearing 15 in the portions A and B, respectively, and noise during pump operation is generated. Never emit.

In the second embodiment, the connecting rod 4 and the elongated hole member 11 may be integrated by the fixing means in the state shown in FIGS. 3 and 4 without using the spring 17. Further, in the first embodiment, the state shown in FIGS. 1 and 2 may be maintained by pressing with a spring.

[0014]

[Effect of device]

 In the reciprocating pump of the present invention, by fixing the long hole member integrally with the connecting rod having the long hole, the eccentric shaft for moving the connecting rod and the left and right portions of the moving direction respectively come into contact with each other. This prevented the generation of noise.

[Brief description of drawings]

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

FIG. 2 is a sectional view of the first embodiment of the present invention.

FIG. 3 is a plan view of a second embodiment of the present invention.

FIG. 4 is a sectional view of a second embodiment of the present invention.

FIG. 5 is a partially cutaway plan view of a second embodiment of the present invention.

FIG. 6 is an exploded view of a second embodiment of the present invention.

FIG. 7 is a sectional view of a connecting rod used in the second embodiment of the present invention.

FIG. 8 is a plan view of a conventional reciprocating pump.

FIG. 9 is a sectional view of the conventional reciprocating pump described above.

[Explanation of symbols]

 1 Motor 2 Eccentric Shaft 3 Bearing 4 Connecting Rod 5 Diaphragm 6 Pump Chamber

Claims (1)

[Scope of utility model registration request] 1. Two pumps spaced apart from each other, a connecting rod arranged between the two pumps and respectively connected to these pumps, and an eccentricity provided in an elongated hole formed in the connecting rod. A reciprocating pump configured by a shaft and configured to operate both pumps by reciprocating motion of a connecting rod due to rotation of an eccentric shaft, in which a long hole member fixed integrally with the connecting rod and having a long hole is formed. Furthermore, the outer peripheral surface of the eccentric shaft is always in contact with the inner surface of the elongated hole of the connecting rod and only one first pump side, and the inner surface of the elongated hole of the elongated member and the other second pump. A reciprocating pump characterized in that it is always in contact with only the side.