Pressure gauge and fluid pressure system

Patent metadata

Field	Value
Publication number	US-2023194324-A1
Application number	US-202218063191-A
Country	US
Kind code	A1
Filing date	Dec 8, 2022
Priority date	Dec 17, 2021
Publication date	Jun 22, 2023
Grant date	—

Abstract

A pressure gauge of a fluid pressure system includes a measurement unit, a case, a display unit, and an adapter. The adapter includes an attachment hole. The case includes an attachment convex portion which can be fitted into the attachment hole. The display unit includes a display surface oriented in a direction intersecting an axis of the attachment convex portion. The attachment convex portion and the attachment hole have a fitting structure capable of changing the relative position between the attachment convex portion and the adapter in the circumferential direction about the axis of the attachment convex portion.

First claim

What is claimed is:

1 . A pressure gauge comprising:
a case configured to accommodate a measurement unit configured to measure a pressure of a fluid; a display unit provided in the case and configured to display the pressure measured by the measurement unit; and an adapter attached to a fluid pressure device, wherein the adapter includes an attachment hole, the case includes an attachment convex portion configured to be fitted into the attachment hole, the display unit includes a display surface oriented in a direction intersecting an axis of the attachment convex portion, and the attachment convex portion and the attachment hole have a fitting structure that allows a relative position between the attachment convex portion and the adapter in a circumferential direction about the axis of the attachment convex portion to be changed.

2 . The pressure gauge according to claim 1 , wherein
the adapter includes an inner attachment surface configured to surround the attachment hole, the attachment convex portion includes an outer attachment surface having a polygonal shape, and the inner attachment surface restricts rotation of the attachment convex portion about the axis relative to the adapter in a fitted state in which the attachment convex portion is fitted into the attachment hole.

3 . The pressure gauge according to claim 2 , wherein
the inner attachment surface is formed in a polygonal shape.

4 . The pressure gauge according to claim 3 , wherein
the attachment convex portion is 45° rotationally symmetric about the axis of the attachment convex portion.

5 . The pressure gauge according to claim 4 , wherein
the outer attachment surface is formed in an octagonal shape, and the inner attachment surface includes a plurality of flat surfaces facing a plurality of flat surfaces of the outer attachment surface in the fitted state.

6 . The pressure gauge according to claim 1 , wherein
the adapter includes an inner attachment surface having a circular shape and configured to surround the attachment hole, the attachment convex portion includes an outer attachment surface having a circular shape, and the inner attachment surface faces the outer attachment surface in a fitted state in which the attachment convex portion is fitted into the attachment hole.

7 . The pressure gauge according to claim 6 , wherein
the attachment convex portion is rotatable about the axis of the attachment convex portion relative to the adapter in the fitted state.

8 . The pressure gauge according to claim 2 , further comprising a retaining member having a line shape and configured to prevent the attachment convex portion from coming out of the attachment hole, wherein
the outer attachment surface includes an annular groove extending in the circumferential direction about the axis of the attachment convex portion, the adapter includes an insertion hole communicating with the annular groove in the fitted state, and the retaining member is inserted into the insertion hole and the annular groove so as to straddle the insertion hole and the annular groove.

9 . The pressure gauge according to claim 5 , further comprising a retaining member having a line shape and configured to prevent the attachment convex portion from coming out of the attachment hole, wherein
the outer attachment surface includes an annular groove extending in the circumferential direction about the axis of the attachment convex portion, the adapter includes: a first hole extending linearly from an outer surface of the adapter to the inner attachment surface; and a second hole located on an extension line of the first hole and extending linearly from the inner attachment surface, the second hole opens to a flat surface of the inner attachment surface, the flat surface extending in a direction inclined with respect to an extending direction of the second hole, and the retaining member is inserted into the first hole, the annular groove, and the second hole so as to straddle the first hole, the annular groove, and the second hole.

10 . A fluid pressure system comprising:
a fluid pressure device; and a pressure gauge attached to the fluid pressure device, wherein the pressure gauge includes: a case configured to accommodate a measurement unit configured to measure a pressure of a fluid; a display unit provided in the case and configured to display the pressure measured by the measurement unit; and an adapter attached to the fluid pressure device, the adapter includes an attachment hole, the case includes an attachment convex portion configured to be fitted into the attachment hole, the display unit includes a display surface oriented in a direction intersecting an axis of the attachment convex portion, and the attachment convex portion and the attachment hole have a fitting structure that allows a relative position between the attachment convex portion and the adapter in a circumferential direction about the axis of the attachment convex portion to be changed.

11 . The fluid pressure system according to claim 10 , wherein
the adapter includes an inner attachment surface configured to surround the attachment hole, the attachment convex portion includes an outer attachment surface having a polygonal shape, and the inner attachment surface restricts rotation of the attachment convex portion about the axis relative to the adapter in a fitted state in which the attachment convex portion is fitted into the attachment hole.

12 . The fluid pressure system according to claim 11 , wherein
the inner attachment surface is formed in a polygonal shape.

13 . The fluid pressure system according to claim 12 , wherein
the attachment convex portion is 45° rotationally symmetric about the axis of the attachment convex portion.

14 . The fluid pressure system according to claim 13 , wherein
the outer attachment surface is formed in an octagonal shape, and the inner attachment surface includes a plurality of flat surfaces facing a plurality of flat surfaces of the outer attachment surface in the fitted state.

15 . The fluid pressure system according to claim 10 , wherein
the adapter includes an inner attachment surface having a circular shape and configured to surround the attachment hole, the attachment convex portion includes an outer attachment surface having a circular shape, and the inner attachment surface faces the outer attachment surface in a fitted state in which the attachment convex portion is fitted into the attachment hole.

16 . The fluid pressure system according to claim 15 , wherein
the attachment convex portion is rotatable about the axis of the attachment convex portion relative to the adapter in the fitted state.

17 . The fluid pressure system according to claim 11 , wherein
the pressure gauge includes a retaining member having a line shape and configured to prevent the attachment convex portion from coming out of the attachment hole, the outer attachment surface includes an annular groove extending in the circumferential direction about the axis of the attachment convex portion, the adapter includes an insertion hole communicating with the annular groove in the fitted state, and the retaining member is inserted into the insertion hole and the annular groove so as to straddle the insertion hole and the annular groove.

18 . The fluid pressure system according to claim 14 , wherein
the pressure gauge includes a retaining member having a line shape and configured to prevent the attachment convex portion from comi

Assignees

• Smc Corp

Inventors

• Suzuki Takahiro

Classifications

• G01F15/065

  with transmission devices, e.g. mechanical · CPC title

• G01F15/185 Primary

  Connecting means, e.g. bypass conduits · CPC title

• G01L19/14

  Housings {(G01L19/0007, G01L19/0084, G01L19/0092, G01L19/04, G01L19/06 take precedence)} · CPC title

• G01L19/08 Primary

  Means for indicating or recording, e.g. for remote indication · CPC title

• G01L19/0038 Primary

  being part of the housing (other details about the housing G01L19/14) · CPC title