Reverse-input blocking clutch and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-12259015-B2
Application number	US-202218287951-A
Country	US
Kind code	B2
Filing date	Dec 27, 2022
Priority date	Jan 14, 2022
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

A reverse-input blocking clutch includes a pressed member having a pressed surface; an input member having an input-side engaging portion; an output member having an output-side engaging portion; an engaging element having a pressing surface, an input-side engaged portion, and an output-side engaged portion and arranged between the pressed surface and the output-side engaging portion with respect to a first direction which is a direction of moving toward or away from the pressed surface; an elastic member that elastically urge the pressing surface toward the pressed surface 7 in the first direction; and a displacement prevention means for preventing relative displacement in the axial direction of the engaging element with respires to the output member.

First claim

The invention claimed is:

1. A reverse-input blocking clutch including:
a pressed member having a pressed surface on an inner peripheral surface thereof;
an input member having at least one input-side engaging portion arranged on inside in a radial direction of the pressed surface and coaxially arranged with the pressed surface;
an output member having an output-side engaging portion arranged on inside in the radial direction of the pressed surface and on inside in the radial direction of the input-side engaging portion, arranged coaxially with the pressed surface, and rotatably supported inside the pressed member;
an engaging element having a pressing surface facing the pressed surface, an input-side engaged portion engageable with the input-side engaging portion, and an output-side engaged portion engageable with the output-side engaging portion, and arranged between the pressed surface and the output-side engaging portion with regard to a first direction which is a direction moving toward or away from the pressed surface so as to move in the first direction;
an elastic member elastically urging the engaging element in a direction that brings the pressing surface closer to the pressed surface with regard to the first direction; and
a displacement prevention member for preventing relative displacement with regard to an axial direction of the engaging element with respect to the output member;
when rotational torque is input to the input member, the engaging element displacing in a direction moving away from the pressed surface with regard to the first direction based on the input-side engaging portion engaging with the input-side engaged portion and transmitting rotational torque input to the input member to the output member by engaging the output-side engaged portion with the output-side engaging portion, and when rotational torque is reversely input to the output member, the engaging element pressing the pressing surface against the pressed surface so as to frictionally engage the pressing surface with the pressed surface based on the output-side engaging portion engaging with the output-side engaged portion, wherein
the pressed member has
an output-side housing element rotatably supporting the output member inside thereof and having the pressed surface on an inner peripheral surface thereof; and
an input-side housing element rotatably supporting the input member inside thereof and coupled and fixed to the output-side housing element.

2. The reverse-input blocking clutch according to claim 1 , wherein
the displacement prevention member has a stopper member locked to the output member and facing a side surface in the axial direction of the engaging element directly or through another member.

3. The reverse-input blocking clutch according to claim 1 , wherein
the elastic member is configured by a leaf spring elastically held between the output-side engaging portion and the engaging element.

4. The reverse-input blocking clutch according to claim 1 , wherein
the engaging element is configured by a pair of engaging elements, and the input-side engaging portion is configured by a pair of input-side engaging portions.

5. A method for assembling a reverse-input blocking clutch,
the reverse-input blocking clutch including:
a pressed member having a pressed surface on an inner peripheral surface thereof;
an input member having at least one input-side engaging portion arranged on inside in a radial direction of the pressed surface and coaxially arranged with the pressed surface;
an output member having an output-side engaging portion arranged on inside in the radial direction of the pressed surface and on inside in the radial direction of the input-side engaging portion, arranged coaxially with the pressed surface, and rotatably supported inside the pressed member;
an engaging element having a pressing surface facing the pressed surface, an input-side engaged portion engageable with the input-side engaging portion, and an output-side engaged portion engageable with the output-side engaging portion, and arranged between the pressed surface and the output-side engaging portion with regard to a first direction which is a direction moving toward or away from the pressed surface so as to move in the first direction;
an elastic member elastically urging the engaging element in a direction that brings the pressing surface closer to the pressed surface with regard to the first direction; and
a displacement prevention member for preventing relative displacement with regard to an axial direction of the engaging element with respect to the output member;
when rotational torque is input to the input member, the engaging element displacing in a direction moving away from the pressed surface with regard to the first direction based on the input-side engaging portion engaging with the input-side engaged portion and transmit rotational torque input to the input member to the output member by engaging the output-side engaged portion with the output-side engaging portion, and when rotational torque is reversely input to the output member, the engaging element pressing the pressing surface against the pressed surface so as to frictionally engage the pressing surface with the pressed surface based on the output-side engaging portion engaging with the output-side engaged portion,
the method, comprising steps of:
rotatably supporting the output member inside the pressed member, arranging the engaging element between the pressed surface and the output-side engaging portion, preventing relative displacement in the axial direction of the engaging elements with respect to the output member by the displacement prevention member, and elastically urging the engaging element in a direction that brings the pressing surface closer to the pressed surface with regard to the first direction by the elastic member, and
moving the input member and the output member in a direction toward each other with regard to the axial direction, engaging the input-side engaging portion with the input-side engaged portion.

Assignees

• Nsk Ltd

Inventors

• Dohi Nagao
• Kaneko Shohei

Classifications

• F16D59/00

  Self-acting brakes, e.g. coming into operation at a predetermined speed · CPC title

• F16D3/50

  with the coupling parts connected by one or more intermediate members (F16D3/16 takes precedence) · CPC title

• F16D2250/0084

  Assembly or disassembly · CPC title

• F16D67/00

  Combinations of couplings and brakes; Combinations of clutches and brakes (combinations of couplings and clutches F16D47/02; conjoint control of brake systems and driveline clutches in vehicles B60W10/02, B60W10/18) · CPC title

• F16D51/12

  mechanically actuated · CPC title