JPS585105Y2 - Kahenstro - Kugataoufukudo Pump - Google Patents

Description

[Detailed description of the invention] This invention relates to a reciprocating pump that is suitable for transporting relatively small amounts of fluid in physical and chemical experiments and industrial equipment. This is what I did.

An embodiment of the present invention will be described below with reference to the drawings.A prime mover 2 and a transmission 3 are built into a box-shaped base 1.
The main shaft 7 is orthogonal to the output shaft 4 of the base 1 and horizontally supported by bearings 5, 5 on both side walls of the base 1. Both ends of the main shaft 7 are made to protrude from the side walls to fix the hollow arm-shaped main body 9 of the crank mechanism 8. The shaft 4 and the main shaft 7 are connected by a transmission mechanism 10 composed of a bevel gear device.

A slot 1 is provided on the outside of the main body 9 extending in a direction perpendicular to the main shaft 7.
1 is provided, and the proximal end of the connecting rod 14 is connected to the part exposed in the slot 11 of the sliding member 13 fitted in the elongated hollow part 12 provided in the main body 9 so as to be orthogonal to the main shaft 7, by means of the support shaft 15. An adjusting screw rod 17 that is rotatably connected and integrated with the handle 16 attached to the tip end surface of the main body 9 is screwed through the screw hole 11 of the sliding member 13, and a fixing screw screwed into the main body 9. j
19 is brought into pressure contact with the lower surface of the sliding member 13.

A block-shaped pump body support member 20 is fixedly protruded on the outside of the side wall of the base 1, and a cylinder-shaped groove 21 is formed on the horizontal upper surface of the base 1 in a groove 21 with inclined surfaces extending in a direction perpendicular to the main shaft 7. The pump main body 22 is fitted horizontally with approximately half of it protruding upward, and a holding member 23 with a U-shaped end is provided on the upper surface of the pump main body 22.
A plurality of pumps are brought into contact with each other at appropriate intervals and fixed to the support member 20 with screw rods 24, and the flange 25' at the base end of the pump body 22 is fitted into a semicircular recess 26 perpendicular to the groove 21. The pump body 22 can be removed.

A hole serving as a guide 27 is formed through the support member 20 in parallel with the groove 21, and a round bar-shaped guide member 29 is supported by a bush 28 and fitted into this guide 27, and a block-shaped drive member 30 is fitted with a guide member 29. The proximal end of the connecting rod 29 is fixed, and the distal end of the connecting rod 14 is rotatably connected by a support shaft 31.

Piston 33 fitted in pump chamber 32 of pump body 22
(or plunger) base end flange 35 of piston rod 34
is fitted into a semicircular recess 36 formed on the upper surface of the drive member 30.

The tip of the pump body 22 is connected to a fluid inlet 37 and an outlet 38, each of which is provided with a ball-shaped check valve 39,40.

In this embodiment configured as described above, the adjustment screw 17 is rotated by the handle 16 to move the sliding member 13 along the hollow part 12, and the eccentricity of the support shaft 15 with respect to the main shaft 7 is adjusted by the scale 41 of the main body 9. By reading the amount, the piston 33
The sliding member 13 is fixed to the main body 9 with the fixing screw 19, the motor 2 is started, and its rotation is transmitted to the main shaft 7 via the transmission 3 and the transmission mechanism 10.

The main body 9 rotates around the main shaft 7, the support shaft 15 revolves around the main shaft 7 on a circle with a radius equal to the eccentricity of the main shaft 7, and the connecting rod 1
The piston 33 and the guide member 29 are integrally reciprocated by reciprocating the driving member 30 via the inlet 4, thereby pressurizing the fluid sucked in from the inlet 37 and discharging it to the outlet 38.

Although the main shaft 7 is configured to drive two pumps at the same time, it may be configured to drive only one pump or three or more pumps.

As described above, the main body 9 having a hollow part 12 orthogonal to the main shaft 7 is fixed to the main shaft 7 driven by the prime mover 2, and the sliding member 13 is fitted into the hollow part 12. Since the crank mechanism 8 is used to operate the pump 22 by means of a rotatably mounted connecting rod 14, the piston 33 of the pump 22 can be moved by fixing the sliding member 13 at an appropriate position. The stroke can be adjusted steplessly between zero and maximum.

The piston 33 (or plunger) of the pump body 22 is not directly connected to the connecting rod 14 of the pump stroke adjustable crank mechanism 8, but is connected via a driving member 30, and a guide parallel to the piston 33 is connected to the driving member 30. The guide 27 of the pump body support member 20 is provided with a protruding member 29.
Since the rotational movement of the crank mechanism 8 is converted into a linear movement regulated by the guide member 29 to drive the piston 33, the torsional force accompanying the rotational movement of the crank mechanism 8 is transmitted to the drive member 30. Therefore, no bending stress or the like acts on the piston 33 at all.

In addition, a guide 27 is provided on the pump body support member 20, and a guide member 29 is placed on the side of the pump body 22 in parallel with the piston 33, so that the piston can accurately reciprocate in a straight line following the drive member 30 that reciprocates in a straight line. Therefore, not only can the overall structure of the pump be extremely simple, but even if the pump is made of glass to transport fluids for physical and chemical experiments, there is no need to worry about damage because bending stress, torsional force, etc. will not be applied to the pump. It has the advantage that it can be handled easily and any given amount of fluid can be transported stably.

[Brief explanation of drawings]

Fig. 1 is a perspective partial view showing an embodiment of the present invention, Fig. 2 is a plan sectional partial view, and Figs. 3 and 4 are arrows X-X in Fig. 1.
and an enlarged sectional view in the Y-Y direction. 1... Base, 2... Prime mover, 7...
... Main shaft, 8 ... Crank mechanism, 9 ... Main body, 13 ... Sliding member, 14 ... Connection rod, 17 ... Adjustment Threaded rod, 20...
Pump body support member, 22... Pump body, 2
7... Guide, 29... Guide member, 30
...... Drive member, 32... Pump chamber, 3
3...Piston, 37...Inlet, 38
······Exit.

Claims (1)

[Scope of utility model registration request] A main body 9 is fixed to a main shaft 7 driven by a prime mover 2, and a sliding member 13 is fitted into a hollow part 12 provided in the main body 9 perpendicular to the main shaft 7 and rotatably connected to a connecting rod 14.
The connecting rod 14 of the crank mechanism 8 is rotatably connected to the drive member 30, and the pump body support member 20 supporting and fixing the pump body 22 is provided with a guide 27 parallel to the pump body 22 to connect the drive member. A guide member 29 fixedly protruding from 30 is fitted into this guide 27, and the pump body 22
A variable stroke type reciprocating pump comprising a piston 33 connected to a driving member 30.