Pump end plate manufacturing method and pump

Patent metadata

Field	Value
Publication number	US-11255330-B2
Application number	US-201716076034-A
Country	US
Kind code	B2
Filing date	Jan 31, 2017
Priority date	Feb 25, 2016
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

A manufacturing method of an end plate of a pump that can remove a sag includes: punching a workpiece from a plate material, the workpiece being the end plate including a mounting seat including a fastener; forming a pressed trace surface by pressing an outer edge of an outer surface, when a surface, of both front and back surfaces of the punched workpiece, further from a sag formed on a cut end surface is the outer surface, and a surface, of both front and back surfaces of the punched workpiece, nearer to the sag is an inner surface. A section of the pressed trace surface disposed along an outer edge of the mounting seat is a fastening section. A section of the pressed trace surface other than the fastening section is a non-fastening section. A radial width of the fastening section is shorter than that of the non-fastening section.

First claim

The invention claimed is:

1. A manufacturing method of an end plate of a pump, including a punching step of punching a workpiece from a plate material, the workpiece being the end plate that has a mounting seat in which a fastener is inserted, characterized by comprising
a pressing step of forming a pressed trace surface by pressing an outer edge of an outer surface, when a surface, of both front and back surfaces of the punched workpiece, that is further from a sag that is formed on a cut end surface is the outer surface, and a surface, of both front and back surfaces of the punched workpiece, that is nearer to the sag is an inner surface, wherein
a first section of the pressed trace surface which is disposed along an outer edge of the mounting seat is a fastening section and a second section of the pressed trace surface which is other than the fastening section is a non-fastening section,
a width of the fastening section is shorter than a width of the non-fastening section,
the pressed trace surface is arranged in an endless ring shape along the outer edge of the outer surface, and
the mounting seat is arranged on the outer surface.

2. The manufacturing method of the end plate of the pump according to claim 1 , wherein the pressed trace surface has a planar chamfered shape or a round chamfered shape.

3. A pump comprising:
a housing in which a pump chamber is defined, the housing including:
a cylindrical housing body that includes an opening portion in at least one end in an axial direction; and
an end plate which has an inner surface that seals the opening portion, an outer surface that is disposed on the opposite side of the inner surface in the axial direction, and a pressed trace surface that is disposed on an outside of the outer surface along an outer edge of the outer surface, wherein

the end plate includes a mounting seat in which a fastener is inserted,
a first section of the pressed trace surface which is disposed along an outer edge of the mounting seat is a fastening section and a second section of the pressed trace surface which is other than the fastening section is a non-fastening section,
a width of the fastening section is shorter than a width of the non-fastening section,
the pressed trace surface is arranged in an endless ring shape along the outer edge of the outer surface, and
the mounting seat is arranged on the outer surface.

4. The pump according to claim 3 , herein the pressed trace surface has a planar chamfered shape or a round chamfered shape.

5. The pump according to claim 3 , further comprising:
a ring-shaped sealing member arranged in the opening portion of the cylindrical housing body,
wherein the pressed trace surface is disposed radially outward of the sealing member.

Assignees

• Taiho Kogyo Co Ltd

Inventors

• Nishida Syuhei
• Ikeda Satoshi
• Mizuno Kazuya
• NAKAMUTA Ken

Classifications

• F04C2/344

  with vanes reciprocating with respect to the inner member · CPC title

• F04C2/086

  Carter · CPC title

• F04C2230/90

  Improving properties of machine parts · CPC title

• F04C29/00 Primary

  Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00 · CPC title

• F04C2240/30

  Casings or housings · CPC title