Unlock instant, AI-driven research and patent intelligence for your innovation.

Gear pump

A technology of gear pumps and gears, which is applied in the direction of pumps, rotary piston pumps, rotary piston machines, etc., can solve problems such as damage and bottlenecks in gear strength, and achieve the effect of reducing fragility and restraining the decline in tensile strength

Active Publication Date: 2016-07-06
SANKYO SEIKI MFG CO LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a concern that if the stress concentration point of the D-shaped notch overlaps the welding line of the hollowed out pump gear, this part will become a bottleneck in the strength of the entire gear, and it is likely to be damaged.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gear pump
  • Gear pump
  • Gear pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] Embodiments of the gear pump according to the present invention will be described in detail below with reference to the drawings. The gear pump 1 according to the present embodiment is a device that constitutes an automatic ice maker installed in a refrigerator, and is a pump that transfers water from a water storage tank to an ice tray. In addition, the so-called "upper" and "lower" in this embodiment are figure 1 The up and down shown, the so-called "horizontal direction" is a direction perpendicular to the up and down direction. The so-called "main view" is the figure 1 The side where the suction port 111 is set in is the front, and it is the line of sight direction when viewing the gear pump 1 from the front. The so-called "top view" is figure 1 The direction of sight when looking at the gear pump 1 from above.

[0055] (the whole frame)

[0056] figure 1 is an exploded perspective view of the gear pump 1, figure 2 is the front sectional view of the assembled...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a gear pump, which comprises a driving gear. The driving gear can be manufactured at a relatively high dimension accuracy without adopting the special resin material generated through the inhibiting and contracting process, or an injection molding machine, while the weld-line-based strength vulnerability is reduced. The gear pump comprises a housing of a pump chamber, wherein the housing is provided with a suction inlet and a discharge outlet for fluid communication; a motor and a pump gear made of resin and arranged in the pump chamber. The gear pump is characterized in that the pump gear is composed of a driving gear driven by the rotation of the motor, and a driven gear engaged with the driving gear. The driving gear is provided with a weld line that extends linearly along the radial direction. The shaft hole part of the driving gear is provided with a D-shaped cut portion of a planar D-shaped cut surface at one part of the inner circumferential surface. With the radial center of the D-shaped cut portion as a starting point, the straight line of the circumferential end portion of the D-shaped cut surface is different in position with the circumferential position of the weld line on the driving gear.

Description

technical field [0001] The present invention relates to a gear pump, and more specifically, to an external gear pump in which main components such as a gear member for pumping fluid (hereinafter also referred to as “pump gear”) are made of resin. Background technique [0002] Even among positive displacement pumps, gear pumps have a relatively simplified structure, a small number of parts, and high mechanical efficiency, so they are suitable for miniaturization, and the fact that the main parts are made of resin is superior in terms of cost and productivity. Due to these advantages, gear pumps made of resin are widely used as a fluid transfer unit for household appliances such as automatic ice making devices for refrigerators and toilet seats for washing with warm water. [0003] Patent Document 1 below discloses a gear pump 1 having a drive gear 7 having a shaft hole 7 a corresponding to the shape of the D-shaped notch 5 a of the support shaft 5 . Further, Patent Document ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/18
CPCF04C2/18F04C2230/20
Inventor 原田隆司河原德幸小松现人
Owner SANKYO SEIKI MFG CO LTD