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hydraulic switch

A technology for hydraulic switches and conductive parts, applied in electrical switches, electrical components, circuits, etc., can solve problems such as product performance degradation, poor contact between the disc 111 and the terminal 112, and reliability reduction, to prevent plastic deformation and inhibit contact. bad effect

Active Publication Date: 2020-04-21
NIDEC TOSOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, if Figure 11 As shown, the following problems arise: the disk 111 is bent to enter the recess 110, and the product performance is deteriorated due to plastic deformation, thereby reducing reliability.
[0006] However, as mentioned above, the operating environment of the hydraulic switch is oil, and foreign substances called pollutants such as metal powder and dust exist in the oil.
Therefore, if Figure 12 As shown, the following problem occurs: in the structure in which there is a large-area support member 113 around the terminal 112, when foreign matter enters between the plane of the disc 111 and the support member 113, the contact between the disc 111 and the terminal 112 is poor. Reduced reliability

Method used

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no. 1 approach

[0031] [1.1 Structure]

[0032] Below, refer to Figure 1 to Figure 4 A first embodiment of the present invention will be described. The term "axis" in this specification means the central axis along the longitudinal direction of the oil introduction space, and when simply referred to as the circumferential direction or the axial direction, means the circumferential direction of the central axis or the axial direction of the central axis. When simply referred to as a radial direction, it means a direction perpendicular to the central axis. One side in the axial direction is referred to as "upper", and the other side is referred to as "lower". In addition, the up-down direction is determined for convenience of description, and does not need to coincide with the direction of gravity.

[0033] The hydraulic switch of the present embodiment has a cylindrical hollow case 1 produced from a metal machined product or a cast product. Inside the housing 1, an oil introduction space ...

Deformed example 1

[0061] Such as Figure 5 as well as Figure 6 As shown, the convex part 14 of the modification 1 is comprised by the protrusion 14b. Here, the convex portion 14 is formed by arranging a plurality of truncated cone-shaped protrusions 14b radially on the opposing surface 13a around the terminal 12a at intervals, and the convex portion 14 is configured as a protrusion stopper structure. Thereby, compared with the case where the convex line 14a is arrange|positioned radially, the recessed part which becomes a gap exists between the protrusions 14b, and foreign matter can be discharged|emitted outward easily accordingly.

Deformed example 2

[0063] Such as Figure 7 As shown, the convex part 14 of the modification 2 is a spiral convex line 14a. In the first embodiment, by providing a plurality of convex lines 14a radially, the interval between the convex lines 14a expands as the distance between the terminals 12a increases, and by forming them in a spiral shape, even if there is only one convex line 14a, it is possible to make the convex lines The interval of 14a increases with distance from terminal 12a.

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Abstract

The invention provides a hydraulic switch which comprises: a hollow housing (1), an oil introducing space (2) which comprises an opening on one end side and is arranged in the housing (1), a flexible conductive part (11) which is arranged on the other end side of the oil introducing space (2) and transforms through hydraulic pressure applied to the oil introducing space (2), a terminal part (12) which is arranged on the opposite side of the oil introducing space (2), is spaced with the conductive part (11) and comprises a terminal (12a) which is a contact portion that the terminal part contacts the conductive part (11) when the conductive part (11) transforms because of hydraulic pressure, an insulation part (13) which is arranged around the terminal (12a), supports the terminal part (12) on the housing (1) and contacts with the conductive part (11) when the conductive part (11) transforms, and a convex portion (14) which is formed on an opposite surface (13a) opposite to the conductive part (11) on the insulation part (13).

Description

technical field [0001] The present invention relates to hydraulic switches. Background technique [0002] A controller for controlling a transmission mechanism is provided in an automatic transmission of a vehicle. The controller judges whether a predetermined level of hydraulic pressure is generated for the transmission mechanism through a hydraulic pressure switch, thereby controlling the transmission mechanism. Conventionally, as this hydraulic switch, a contact type mechanical switch in which a contact of a pressure-receiving movable part is composed of a metal spring called a diaphragm and a fixed contact has been used. [0003] Such a hydraulic switch is disclosed in, for example, Japanese Laid-Open Publication No. Hei 2-98432 or Japanese Laid-Open Publication No. 2014-89832, and is mounted on a control valve mechanism of a transmission. Since the control valve mechanism is disposed in oil, the operating environment of the hydraulic switch is in oil. When high hydra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H35/34
CPCH01H35/346
Inventor 大泽朝华若林弘宣中村俊晃立田洋
Owner NIDEC TOSOK CORP