Meshing-type engagement device

Patent metadata

Field	Value
Publication number	US-10012269-B2
Application number	US-201615058873-A
Country	US
Kind code	B2
Filing date	Mar 2, 2016
Priority date	Mar 2, 2015
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A meshing-type engagement device includes a first member, a second member, a pressing mechanism, and a reaction force mechanism. The first member is provided with a plurality of first dog teeth. The second member is provided with a plurality of second dog teeth. The pressing mechanism is configured to press the first member to the second member side. The reaction force mechanism is configured to generate a reaction force with respect to a pressing force pressing the first member for the first dog teeth and the second dog teeth to mesh with each other such that the amount of increase in the reaction force with respect to a movement of the first member is larger at a position further on the second member side than a predetermined position compared to the amount of increase to the predetermined position when the first member is pressed.

First claim

What is claimed is:

1. A meshing-type engagement device comprising:
a first member provided with a plurality of first dog teeth at a first end of the first member, the plurality of first dog teeth being placed at regular intervals in a circumferential direction of the first member;
a case which engages a second end of the first member in a non-rotatable manner, the case including an annular groove facing the second end of the first member;
a second member provided with a plurality of second dog teeth, the plurality of second dog teeth being placed at regular intervals in a circumferential direction of the second member;
a pressing mechanism configured to press the first member to a second member side when a fluid is provided to the annular groove of the case such that the first dog teeth are inserted between and mesh with the second dog teeth when the first member is pressed, the case and the first member constituting the pressing mechanism; and
a reaction force mechanism configured to generate a reaction force with respect to a pressing force pressing the first member for the first dog teeth and the second dog teeth to mesh with each other such that an amount of increase in the reaction force with respect to a movement of the first member is larger at a position further on the second member side than a predetermined position compared to the amount of increase to the predetermined position when the first member is pressed, the predetermined position being a position achieved until the respective dog teeth begin to mesh with each other after the first member is pressed and begins to be moved toward the second member side,
wherein the reaction force mechanism includes a first elastic member causing an elastic force to act on the first member regardless of the position of the first member and a second elastic member in contact with the first member and causing an elastic force to act on the first member in a case where the first member is moved to the predetermined position, a first end of the first elastic member being connected to a spring seat connected to the case and a second end of the first elastic member contacting a side surface of the first member, and a first end of the second elastic member being connected to the spring seat and a second end of the second elastic member contacting the side surface of the first member when the first member is moved to the predetermined position.

2. The meshing-type engagement device according to claim 1 , wherein the first elastic member is longer than the second elastic member.

3. The meshing-type engagement device according to claim 1 , wherein the second member includes a holding member connected to a carrier, a piston accommodated inside the holding member, and a third elastic member between a first side of the piston and the holding member, the second dog teeth being provided on a second side of the piston.

4. A meshing-type engagement device comprising:
a first member provided with a plurality of first dog teeth, the plurality of first dog teeth being placed at regular intervals in a circumferential direction of the first member;
a second member provided with a plurality of second dog teeth, the plurality of second dog teeth being placed at regular intervals in a circumferential direction of the second member;
a pressing mechanism configured to press the first member to a second member side such that the first dog teeth are inserted between and mesh with the second dog teeth when the first member is pressed; and
a reaction force mechanism configured to generate a reaction force with respect to a pressing force pressing the first member for the first dog teeth and the second dog teeth to mesh with each other such that an amount of increase in the reaction force with respect to a movement of the first member is larger at a position further on the second member side than a predetermined position compared to the amount of increase to the predetermined position when the first member is pressed, the predetermined position being a position achieved until the respective dog teeth begin to mesh with each other after the first member is pressed and begins to be moved toward the second member side,
wherein the reaction force mechanism includes a first elastic member causing an elastic force to act on the first member regardless of the position of the first member, and a second elastic member in contact with the first member and causing an elastic force to act on the first member in a case where the first member is moved to the predetermined position,
wherein the first dog teeth and the second dog teeth are separated by a torque being transmitted for the rotational speed of the second member to be reduced, and
wherein the meshing-type engagement device further comprises a holding member configured to being brought into contact with the second member when the torque is transmitted so that the rotational speed of the second member is reduced.

5. The meshing-type engagement device according to claim 4 , wherein the first elastic member is longer than the second elastic member.

6. The meshing-type engagement device according to claim 4 , wherein the second member includes the holding member connected to a carrier, a piston accommodated inside the holding member, and a third elastic member between a first side of the piston and the holding member, the second dog teeth being provided on a second side of the piston.

Assignees

• Toyota Motor Co Ltd

Inventors

• Yoshino Hirotsugu
• Tabuchi Motoki
• Kawakami Takaho
• Kuwahara Seiji
• Shiotsu Isamu

Classifications

• F16D25/061 Primary

  the clutch having interengaging clutch members · CPC title

• F16D11/14 Primary

  with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) · CPC title

• F16D23/12

  Mechanical clutch-actuating mechanisms arranged outside the clutch as such (specific for combined clutches F16D21/00; mechanisms specific for synchronisation F16D23/02) · CPC title

• F16D48/06

  Control by electric or electronic means, e.g. of fluid pressure · CPC title

• F16D27/118

  with interengaging jaws or gear teeth · CPC title