Friction engaging device

Patent metadata

Field	Value
Publication number	US-11293497-B2
Application number	US-202016809981-A
Country	US
Kind code	B2
Filing date	Mar 5, 2020
Priority date	May 28, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

The present disclosure provides a wet friction engaging device. The device includes: a plate group engaged with two connecting members and including two groups of friction plates housed in a plate housing chamber and alternately arranged; and a spring attached between a spring plate and an end plate. The plate group is switched between an engaged state in which the friction plates are in close contact with each other, and a disengaged state in which the friction plates are separable from each other. The spring plate is fixed to the end plate.

First claim

The invention claimed is:

1. A wet friction engaging device for switching transmission of power to be output to a rotary shaft, the device comprising:
two connecting members, each having a surface facing a surface of the other connecting member in a radial direction with a plate housing chamber interposed therebetween, the chamber being supplied with lubricating oil; and
a plate group engaged with the connecting members and including two groups of friction plates housed in the plate housing chamber and alternately arranged in an axial direction with surfaces facing each other, wherein
the plate group is switched between
an engaged state in which the friction plates are in close contact with each other upon application of a pressing force, and
a disengaged state in which the friction plates are separable from each upon release of the pressing force,

a spring is attached between end plates at respective ends of the plate group to apply a biasing force in the axial direction to separate the end plates, and
at least one of the end plates has a dome-shaped spring holder at a portion corresponding to a position of the spring, the dome-shaped spring holder detachably supporting the spring.

2. The friction engaging device of claim 1 , wherein
at least one end of the spring is fixed to one of the end plates.

3. The friction engaging device of claim 2 , wherein
the spring includes a plurality of springs in three or more positions at a predetermined interval in a circumferential direction.

4. The friction engaging device of claim 3 , wherein
the springs are located outside outer circumferential edges of the friction plates arranged between the end plates.

5. The friction engaging device of claim 1 , wherein
at least one end of the spring is detachably supported by the dome-shaped spring holder at one of the end plates.

6. The friction engaging device of claim 5 , wherein
the spring includes a plurality of springs in three or more positions at a predetermined interval in a circumferential direction.

7. The friction engaging device of claim 6 , wherein
the springs are located outside outer circumferential edges of the friction plates arranged between the end plates.

8. The friction engaging device of claim 1 , wherein
the spring includes a plurality of springs in three or more positions at a predetermined interval in a circumferential direction.

9. The friction engaging device of claim 8 , wherein
the springs are located outside outer circumferential edges of the friction plates arranged between the end plates.

10. The friction engaging device of claim 1 , wherein
of the end plates on an input side and an output side, the end plate on the input side is provided with the dome-shaped spring holder,
the spring includes a plurality of springs spaced apart from each other in a circumferential direction, and
the dome-shaped spring holder includes a plurality of dome-shaped spring holders spaced apart from each other in the circumferential direction.

Assignees

• Mazda Motor

Inventors

• Ebisumoto Hirofumi
• Sori Tsukasa

Classifications

• F16D13/69 Primary

  Arrangements for spreading lamellae in the released state · CPC title

• F16D13/52

  Clutches with multiple lamellae {; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member (F16D13/385 takes precedence)} · CPC title

• F16D25/0638

  with more than two discs, e.g. multiple lamellae · CPC title

• F16D2013/642

  with resilient attachment of frictions rings or linings to their supporting discs or plates for allowing limited axial displacement of these rings or linings · CPC title

• F16D13/38

  with flat clutching surfaces, e.g. discs · CPC title