JPS6137828Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a reciprocating pump drive device in which fluid is pumped by the drive stroke of a reciprocating member, and the stroke of the reciprocating member can be adjusted. be.

Generally known reciprocating pumps of this type include, for example, bellows-type pumps, plunger-type pumps, and diaphragm-type pumps. In this type of pump, the reciprocating member has one end connected to a bellows, plunger, or diaphragm, and the other end connected to a power source via a crank mechanism. The stroke is generally adjusted by moving the center of rotation of the crank mechanism or changing the radius of rotation.

However, in the case of such conventional stroke-adjustable drive devices, the stroke cannot be freely adjusted when the pump is in operation, that is, while the reciprocating member is in operation. Ta. Therefore, the pump must be stopped every time an adjustment is made, which is extremely troublesome and
There was a problem in that it required several operations to obtain an accurate adjustment amount. Further, in the case where the adjustment operation can be performed while the pump is in operation, the mechanism is complicated, and there remain problems such as complicating the structure of the entire drive device, making manufacturing difficult, and increasing costs.

Therefore, an object of the present invention is to provide an improved reciprocating pump drive device that allows free and smooth stroke adjustment during pump operation, has a simple structure, is easy to manufacture, and can be manufactured at low cost. There is something to do.

In order to achieve the above objective, the drive device of the present invention has the following features:
Basically, the first groove is connected to a power drive source, is rotatable about a fixed axis, and has a first groove extending perpendicular to the fixed axis.
a rotating member, and a second groove that is arranged opposite to the first rotating member, is rotatable around a movable axis, runs perpendicular to the movable axis, and intersects the first groove. a second rotating member, and a first sliding portion located between the first and second rotating members and slidingly engaging the first groove at one end, and a second sliding portion at the other end. a sliding member having a second sliding portion that is slidably engaged; a driving member that is connected to the reciprocating member and rotatably engaged on the sliding member; and supporting the second rotating member. The rotating member also includes a support member that is movable in a plane perpendicular to the movable axis, and an adjusting means that can adjust the amount of movement of the second rotating member via the support member.

The aforementioned adjustment means also comprises a threaded rod threadably engaged with the support member and a manual adjustment knob attached to the end of the rod.

In the drive device of the present invention as described above, by appropriately moving the support member in the lateral direction by the adjusting means, the second rotating member also moves accordingly, thereby causing the sliding member to move. Through this, the amount of rotation of the drive member changes and the stroke of the reciprocating member is adjusted. Moreover, this adjustment can be made smoothly while the first and second rotating members are continuously rotating together with the sliding member.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the accompanying drawings.
The embodiment shown in Fig. 1 to Fig. 6 is an embodiment in which the drive device of the present invention is applied to a bellows-type reciprocating pump. Since the pump portion has a well-known structure, only the external appearance is shown. Reference numeral 1 denotes a pump body having an inlet 2 and an outlet 3, and a pump chamber formed therein via a valve, and 4 denotes a vertically arranged bellows having one end connected to the body 1, and the other end of the bellows 4 is connected to the upper end or one end of a reciprocating member 5. In the case of this pump, the pump feed fluid is air, and as shown by the arrow in Fig. 1, the air flowing in from the inlet is quantitatively discharged from the pump body 1 to the outlet 3 in response to the expansion and contraction of the bellows 4.
It flows out through.

The pump body 1 is attached to a frame 6, and the drive device 7 of the present invention is also attached to this frame 6. The frame 6 is fixed to a frame 11 that houses a drive motor 8 as a power drive source, a rotary drive shaft 9, and a speed change gear mechanism 10 therebetween. Frame 1 of the drive device 7 is attached to the frame 11.
2 is attached to the frame 12, and a guide block 13 and a transparent display scale plate 14 are attached to the free end of the frame 12 by bolts 15.

A stepped cylindrical first rotating member 16 is fixed to the protruding end of the aforementioned rotary drive shaft 9 with a screw, and the member 16 is rotatable around a fixed axis X that coincides with the axis of the shaft 9. ing. The enlarged diameter portion of this member 16 is shaped like a disk, and its end surface 16a is in a plane perpendicular to the fixed axis X.
A first groove 17 having a rectangular cross section and having both ends open at the outer periphery of the member 16 is formed therein along the diameter direction. That is, this first groove 17 extends in a direction perpendicular to the fixed axis X.

A second rotating member 18 having the same shape as the first member is arranged opposite to and spaced apart from the first rotating member 16, and the small diameter portion of the member is connected to a block-shaped support member 20 via a bearing 19. It is rotatably supported in a manner gripped by. The rotational axis Y (hereinafter referred to as the movable axis) of the second member 18 is parallel to the fixed axis X, and in this embodiment, is on the same level in the horizontal direction and spaced apart along the lateral direction. There is. The second member 1
The end surface 18a of the disk-shaped enlarged diameter portion of No. 8 is in a plane perpendicular to the movable axis Y, and there is a rectangular cross-section with both ends open at the outer periphery of the member along the diametrical direction. Two grooves 21 are formed. This second groove 21 extends in a direction perpendicular to the movable axis Y.

End faces 16 of first and second rotating members 16, 18
A pin-shaped sliding member 22 is placed between a and 18a, and a first sliding portion 22a that slides into the first groove 17 is integrally formed at one end of the member 22, and a second sliding portion 22a is integrally formed at the other end of the sliding member 22. The second groove 21 is slidably engaged with the second
A sliding portion 22b is integrally formed. The sliding surfaces formed on both the sliding parts 22a and 22b are aligned with the axis Z (third axis) of the sliding member 22.
They are at right angles to each other with respect to the circumference of the figure). Therefore, this sliding member 22 is connected to both rotating members 1.
6, 18, the first groove 1
7 are perpendicular to the second groove 21 with respect to the direction of rotation.

A ring-shaped drive member 24 is rotatably engaged with the outer periphery of the sliding member 22 via a bearing 23 in a concentric manner. The member 24 is integrally formed at the lower end or other end of the rod-shaped reciprocating member 5. Of course, the drive member 24 may be constructed as a separate member from the member 5 and connected to each other.

A threaded rod 25, which is horizontally arranged and rotatably supported by the guide block 13, is threadedly engaged with the support member 20 mentioned above. A stopper 26 is screwed to one end of the rod 25, and a manual adjustment knob 27 is screwed to the other end. Therefore, when the knob 27 is turned, the rod 25 is rotated in an axially fixed manner, so that the support member 20 is rotated with the second rotating member 18 horizontally and at right angles to the axis of movement Y. move in the direction. The knob 27 and the rod 25 constitute an adjusting means for adjusting the amount of movement of the second rotating member 18.

In order to restrict the range of movement of the support member 20, the guide block 13 is provided with a laterally long rectangular window 28 which accommodates the rectangular block 13, as can be seen in FIG.
is formed, and the member 20 can move left and right to a position where it abuts both end surfaces of the window 28.

Further, a small-diameter stepped portion is integrally formed on the opposite side of the supporting member 20 from the second member 18, and a pointer 29 is attached thereto. As shown in FIG. 4, a scale 30 is provided on the display scale plate 14 in the horizontal direction corresponding to the pointer 29, and this indicates the position of the support member 20, that is, the position of the second member 18. is accurately understood. Note that the scale plate 14 is formed with a horizontally long rectangular window 31 that movably accommodates a small-diameter stepped portion of the support member 20.

In the drive device of the present invention having the above configuration, the first rotating member 16 is rotated via the shaft 9 by driving the motor 8, and the second rotating member 18 is also rotated via the sliding member 22. This rotation exhibits a rotation transmission mode of the Oldham joint, which is known as a rotation transmission mechanism when the rotation axes are different from each other. However, in this invention, the first and second
The rotating members 16, 18 and the sliding member 2 between them
The main purpose of the second configuration is not to transmit off-axis rotation as intended by the Oldham joint, but to obtain eccentric rotational motion of the sliding member.

Explaining based on FIGS. 9a, 9b, and 9c, the rotation centers of the first and second rotating members 16 and 18 and the axis of the sliding member 22 are aligned with the respective rotation axes X, Y, and axis Z. If the code is attached, 9th a.
In the figure, first and second rotating members 16, 18
are separated by a center-to-center distance d in the horizontal direction. In this state, when the second member 16 rotates in the direction of the arrow as shown in FIGS. 9b and 9c, the sliding member 22 slides within the first and second grooves 17 and 21, and the axis Z thereof is not shown in the figure. Draw an arc like this. The arc forms a circle whose diameter is the distance d between the centers X and Y, and whose eccentric rotation center is the center point P between the centers. Additionally, the sliding member 22 rotates once while the first and second rotating members 16, 18 rotate 180 degrees. The amount of eccentricity is the distance between point P and center X.

Therefore, based on the operation of the adjusting means, as the center Y of the second member 18 approaches the center X of the first member 16, the eccentric rotation center P also approaches the center X, and the rotation diameter d also becomes smaller.

Since the sliding member 22 and the drive member 24 are concentrically arranged, while the sliding member 22 pivots with a diameter d, they pivot with the same center of eccentric rotation and diameter of rotation. During this time, the driving member 24 is placed on the sliding member 22.
rotates relatively. That is, as the center Y of the second member 18 approaches the center X of the first member 16, the driving stroke of the reciprocating member 5 becomes smaller, and conversely, as the center Y moves farther away from the center X, the stroke becomes larger.
It will be clear from the above description that the distance between the centers X and Y can be adjusted by rotating the knob 27. Moreover, such an adjustment operation can be performed freely and smoothly even while the first and second members 16 and 18 are rotating, and there is no need to stop the pump operation one by one, and the adjustment operation can be carried out freely and smoothly even when the first and second members 16 and 18 are rotating, and there is no need to stop the pump operation one by one, and the adjustment operation can be carried out freely and smoothly even when the first and second members 16 and 18 are rotating. Adjustment operations can be performed continuously, easily and quickly. Also, the pointer 29 for the scale 30
It is even more convenient to find accurate stroke values instantaneously.

In addition to the bellows type pump, the drive device of the present invention can be easily applied to, for example, a plunger type pump shown in FIG. 7 or a diaphragm type pump shown in FIG. 8.

As shown in FIG. 7, in the case of the plunger type, if the reciprocating member 5 is linked, for example, to one end of the plunger 41 slidably placed on the pump body 40, the plunger 41 can have a variable stroke. This allows pumping fluid to be metered into the pump chamber 42 from the inlet 43 to the outlet 44 as indicated by the arrow.

In addition, as shown in FIG. 8, in the case of a diaphragm type, a rod 52 whose one end is attached to a diaphragm 51 installed inside the pump body 50 is omitted from illustration; Similarly, Rod5
A reciprocating member can be linked to the other end of 2. With this configuration, variable reciprocating motion is transmitted to the diaphragm 51 via the rod 52, and the pumping fluid in the pump chamber 53 is quantitatively fed from the inlet 54 to the outlet 55 as shown by the arrow. Ru.

In any case, the present invention can be applied to a type of pump that utilizes the stroke of a reciprocating member.

In addition, in the embodiment, first and second grooves 17 and 21 are formed on the first and second rotating members 16 and 18.
are formed along the diameter direction passing through the center, and both grooves 17 and 21 are perpendicular to each other, but this achieves the intended purpose of providing variable eccentric movement to the drive member 24. However, it is not necessarily limited to the configuration of this embodiment. For example, each groove can be provided in a manner that is deviated from the diameter direction, or the intersecting angle of both grooves can be set to a non-right angle state.

Further, in the embodiment, the adjustment movement is made in the horizontal direction in a vertically arranged pump, but it is also possible to adjust the movement in the vertical direction in a horizontally arranged pump. Also, the adjustment means
In addition to the configuration of the threaded rod and knob in the example,
A configuration in which the support member is moved using a gear mechanism, etc.
Various designs can be considered, and the invention is not limited to this embodiment.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway elevational view of an embodiment in which the drive device of the present invention is applied to a bellows type reciprocating pump, and Fig. 2 is a side view of Fig. 1 viewed from the left side with the display scale plate removed. Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is an enlarged view of the display scale plate, Figure 5 is a partial sectional view taken along the - line in Figure 3, and Figure 6. is a partial sectional view taken along the line - in FIG. 3, and FIG. 7 is a schematic diagram showing an embodiment in which the drive device of the present invention is applied to a plunger-type pump.
Fig. 8 is a schematic diagram of a diaphragm type pump to which the drive device of the present invention can be applied, Fig. 9a, Fig. 9b,
FIG. 9c is an explanatory diagram of the operation of the drive device of the present invention. 4... Bellows, 5... Reciprocating member, 16...
First rotating member, 18... Second rotating member, 20
...Supporting member, 22...Sliding member, 24...Driving member, 27...Manual adjustment knob.

Claims (1)

[Claims for Utility Model Registration] (1) A reciprocating pump drive device in which a fluid pumping operation is performed by the reciprocating motion of a reciprocating member, and the drive stroke of the reciprocating member is adjustable. a first rotating member connected to a power drive source and rotatable around a fixed axis and having a first groove extending perpendicular to the fixed axis; and a first rotating member facing the first rotating member. a second rotating member arranged and rotatable around a movable axis and having a second groove extending perpendicularly to the movable axis and intersecting the first groove; a first sliding portion disposed between the rotating members and slidingly engaged with the first groove at one end, and a second sliding portion slidingly engaging the second groove at the other end;
a sliding member having a sliding portion; a driving member connected to the reciprocating member and rotatably engaged on the sliding member; a support member movable in a plane along a right angle direction;
A drive device for a reciprocating pump, comprising an adjustment means that can adjust the amount of movement of the second rotating member via a support member. (2) The drive device according to claim 1, wherein the adjustment means comprises a threaded rod threadedly engaged with the support member, and a manual adjustment block attached to an end of the rod. .