Throttle device

Patent metadata

Field	Value
Publication number	US-12098689-B2
Application number	US-202318365829-A
Country	US
Kind code	B2
Filing date	Aug 4, 2023
Priority date	Aug 5, 2022
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

A throttle device includes a rotating member coupled to a throttle shaft and rotated by a drive source, and a coil spring interposed between a throttle body and the rotating member and configured to bias the throttle valve toward a default position. The coil spring has a first spring portion, a second spring portion, and an intermediate hook portion for connecting the first spring portion and the second spring portion. The rotating member includes an inner periphery supporting portion that supports an inner peripheral side of the first spring portion, an outer periphery supporting portion that supports an outer peripheral side of the first spring portion, and a blocking structure for preventing the first spring portion from being fitted to an outside of the outer periphery supporting portion when assembling the coil spring.

First claim

What is claimed is:

1. A throttle device, comprising:
a throttle body including an intake passage, a throttle valve positioned in the intake passage and configured to open and close the intake passage;
a throttle shaft coupled to the throttle valve;
a rotating member coupled to the throttle shaft and configured to be rotated by a drive source;
a coil spring interposed between the throttle body and the rotating member, wherein the coil spring biases the throttle valve toward a default position,
wherein the coil spring includes a first spring portion having a first end, a second spring portion having a second end, and an intermediate hook portion connecting the first spring portion and the second spring portion; and
wherein the first end of the first spring portion engages a first spring engaging portion of the rotating member, the second end engages a second spring engaging portion of the throttle body, and the intermediate hook portion engages at least one of a first stopper of the rotating member and a second stopper of the throttle body;

an inner periphery supporting portion provided of the rotating member or the throttle shaft configured to support an inner peripheral side of the first spring portion; and
an outer periphery supporting portion of the rotating member configured to support an outer peripheral side of the first spring portion,
wherein the rotating member includes a blocking structure configured to prevent the first spring portion from being fitted into an outside of the outer periphery supporting portion when assembling the coil spring.

2. The throttle device of claim 1 , wherein the blocking structure is positioned between the outer periphery supporting portion of the rotating member and the first spring engaging portion.

3. The throttle device of claim 1 , wherein the blocking structure is configured to prevent a first loop on a side of the first end of the first spring from being completely shifted to the outside of the outer periphery supporting portion when the intermediate hook portion engages the first stopper, and wherein the first end of the coil spring engages the first spring engaging portion of the rotating member.

4. The throttle device of claim 1 , wherein the blocking structure is configured to prevent a first loop on a side of the first end of the first spring portion from being fitted into a position passing by the outside of the outer periphery supporting portion, wherein the first end of the coil spring engages the first spring engaging portion of the rotating member, and wherein the first loop on the side of the first end of the first spring portion is in contact with an internal surface of the blocking structure.

5. The throttle device of claim 1 , wherein:
the blocking structure protrudes axially from a base of the rotating member,
the blocking structure further includes an inner inclined surface, and
the inner inclined surface of the blocking structure inclines inward from a top of the blocking structure toward the base of the rotating member.

6. The throttle device of claim 1 , wherein:
the first spring portion is an opener spring portion configured to operate when the throttle valve is closed further than the default position, and
the second spring portion is a return spring portion configured to operate when the throttle valve is open further than the default position.

Assignees

• Aisan Ind

Inventors

• Kimura Yuichi

Classifications

• F02D2009/0269

  Throttle closing springs; Acting of throttle closing springs on the throttle shaft · CPC title

• F02D9/1005

  Details of the flap · CPC title

• F02D9/02

  concerning induction conduits (throttle valves, or arrangements thereof in conduits F02D9/08) · CPC title

• F02D9/107

  Manufacturing or mounting details · CPC title

• F02D9/1065 Primary

  Mechanical control linkage between an actuator and the flap, e.g. including levers, gears, springs, clutches, limit stops of the like · CPC title