Hydraulic switch and hydraulic brake system

Patent metadata

Field	Value
Publication number	US-11338787-B2
Application number	US-201916398693-A
Country	US
Kind code	B2
Filing date	Apr 30, 2019
Priority date	May 14, 2018
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

The disclosure provides a hydraulic switch including a casing, a first cable, a second cable, an electrically conductive piston and a first magnetic conductive component. The casing has a chamber and a liquid channel connected to the chamber. The first cable is disposed through the casing, and the first electrical connection portion of that is located in the chamber. The second cable is disposed through the casing, and a second electrical connection portion of that is located in the chamber. The electrically conductive piston movably is disposed in the chamber. When the electrically conductive piston is in an electrically connected position, the electrically conductive piston is in electrical contact with the first electrical connection portion and the second electrical connection portion. The first magnetic conductive component is configured to provide a magnetic force to move the electrically conductive piston toward an electrically disconnected position.

First claim

What is claimed is:

1. A hydraulic switch, comprising:
a casing, having a chamber and a liquid channel connected to the chamber;
a first cable, having a first electrical connection portion, wherein the first cable is disposed through the casing, and the first electrical connection portion is located in the chamber;
a second cable, having a second electrical connection portion, wherein the second cable is disposed through the casing, and the second electrical connection portion is located in the chamber;
an electrically conductive piston, disposed in the chamber and movable between an electrically connected position and an electrically disconnected position, wherein the electrically disconnected position is located closer to the liquid channel than the electrically connected position; when the electrically conductive piston is in the electrically connected position, the electrically conductive piston is in electrical contact with the first electrical connection portion and the second electrical connection portion so as to electrically connect the first cable with the second cable; when the electrically conductive piston is in the electrically disconnected position, the electrically conductive piston is spaced apart from the first electrical connection portion and the second electrical connection portion; and
a first magnetic conductive component, disposed on the electrically conductive piston and configured to provide a magnetic force to move the electrically conductive piston toward the electrically disconnected position;
wherein the hydraulic switch further comprises a second magnetic conductive component, the first magnetic conductive component and the second magnetic conductive component are magnets that are set to repel each other, and the second magnetic conductive component is disposed on the casing.

2. The hydraulic switch according to claim 1 , wherein the casing comprises an end part, an annular part and a wire fixing part, the annular part is connected to and located between the end part and the wire fixing part, the end part, the wire fixing part and the annular part together form the chamber, the liquid channel penetrates through the end part, and the first cable and the second cable is disposed through the wire fixing part.

3. The hydraulic switch according to claim 2 , wherein the second magnetic conductive component is disposed on the wire fixing part.

4. The hydraulic switch according to claim 3 , wherein the wire fixing part includes an outer part and an inner part, the outer part is sleeved on the inner part, the outer part is mounted to the annular part, the first cable and the second cable is disposed through the inner part, and the second magnetic conductive component is disposed on the inner part.

5. The hydraulic switch according to claim 4 , wherein the electrically conductive piston has a first recess, the inner part has a second recess, and the first magnetic conductive component and the second magnetic conductive component are respectively disposed in the first recess and the second recess.

6. The hydraulic switch according to claim 4 , wherein the inner part of the wire fixing part includes a first main body and a second main body, at least part of the first cable and at least part of the second cable are clamped by the first main body and the second main body, and the outer part is sleeved on the first main body and the second main body.

7. The hydraulic switch according to claim 3 , wherein the second magnetic conductive component is in an annular shape, and the second magnetic conductive component surrounds the first cable and the second cable.

8. The hydraulic switch according to claim 3 , wherein the second magnetic conductive component is located between the first cable and the second cable.

9. The hydraulic switch according to claim 1 , further comprising a sealing ring sleeved on the electrically conductive piston and clamped by the electrically conductive piston and the casing.

10. A hydraulic brake system, comprising:
a caliper, having an oil inlet; and
the hydraulic switch according to claim 1 , wherein the hydraulic switch is disposed in the oil inlet of the caliper.

11. A hydraulic brake system, comprising:
a caliper;
a brake lever;
the hydraulic switch according to claim 1 ; and
a three-way connector, having a first opening, a second opening and a third opening that are respectively connected to the caliper, the brake lever and the hydraulic switch.

12. A hydraulic switch, comprising:
a casing, having a chamber and a liquid channel connected to the chamber;
a first cable, disposed through the casing and electrically insulated with the casing, wherein the first cable has a first electrical connection portion, and the first electrical connection portion is located in the chamber;
a second cable, disposed on the casing, wherein the second cable has a second electrical connection portion, and the second electrical connection portion is electrically connected to the casing;
an electrically conductive piston, disposed in the chamber and in electrical contact with the casing, wherein the electrically conductive piston is movable between an electrically connected position and an electrically disconnected position, the electrically disconnected position is located closer to the liquid channel than the electrically connected position; when the electrically conductive piston is in the electrically connected position, the electrically conductive piston is in electrical contact with the first electrical connection portion so as to electrically connect the first cable with the second cable; when the electrically conductive piston is in the electrically disconnected position, the electrically conductive piston is spaced apart from the first electrical connection portion; and
a first magnetic conductive component, disposed on the electrically conductive piston and configured to provide a magnetic force to move the electrically conductive piston toward the electrically disconnected position.

13. The hydraulic switch according to claim 12 , wherein the casing comprises an end part, an annular part and a wire fixing part, the annular part is connected to and located between the end part and the wire fixing part, the end part, the wire fixing part and the annular part together form the chamber, the liquid channel penetrates through the end part, the first cable is disposed through and electrically insulated with the wire fixing part, the second cable is disposed on the wire fixing part, the second electrical connection portion of the second cable is electrically connected to the annular part, and the electrically conductive piston is in electrical contact with the annular part.

14. The hydraulic switch according to claim 13 , further comprising a second magnetic conductive component, wherein the first magnetic conductive component and the second magnetic conductive component are magnets that are set to repel each other, and the second magnetic conductive component is disposed on the wire fixing part.

15. The hydraulic switch according to claim 14 , wherein the wire fixing part comprises an outer part and an inner part, the outer part is sleeved on the inner part, the inner part is electrically insulated with the outer part, the outer part is mounted to the annular part and is in electrical contact with the annular part, the first cable is disposed through and electrically insulated with the inner part, the second electrical connection portion of the second cable is in electrical contact with the outer part, and the second magnetic conductive component is disposed on the inner part.

Assignees

• Tektro Technology Corp

Inventors

• Chu en-liang

Classifications

• B62L3/023

  acting on fluid pressure systems · CPC title

• H01H2001/545

  having permanent magnets directly associated with the contacts · CPC title

• F16D2121/14

  Mechanical · CPC title

• F16D55/22

  by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads · CPC title

• B60T17/22 Primary

  Devices for monitoring or checking brake systems; Signal devices · CPC title