Automatic transmission

Patent metadata

Field	Value
Publication number	US-11306792-B2
Application number	US-202017029412-A
Country	US
Kind code	B2
Filing date	Sep 23, 2020
Priority date	Oct 30, 2019
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

An automatic transmission is provided, which includes a transmission case having a vertical wall part, a clutch disposed on a first side of the vertical wall part in an axial direction, a given component disposed on the second side of the vertical wall part, and a sleeve having a cylindrical body and a flange part coupled to the second side of the vertical wall part and disposed radially inward of the given component. The hydraulic fluid is supplied to the clutch from radially inward of the clutch through the vertical wall part. An oil supply passage is configured to supply the hydraulic fluid to the radially inward of the clutch through a first oil passage extending in the axial direction via a coupling part between the vertical wall part and the flange part, a second oil passage inside the flange part, and a third oil passage inside the cylindrical body.

First claim

What is claimed is:

1. An automatic transmission, comprising:
a transmission case having a vertical wall part;
a clutch disposed on a first side of the vertical wall part in an axial direction of the transmission case;
a given component disposed on a second side of the vertical wall part in the axial direction;
a sleeve having a cylindrical body extending in the axial direction to the first side and to the second side of the vertical wall part, at a location radially inward of the vertical wall part, and a flange part extending radially outward from the cylindrical body and coupled to the vertical wall part from the second side in the axial direction, the flange part being disposed radially inward of the given component; and
an oil supply passage through which hydraulic fluid is supplied to the clutch,
wherein the hydraulic fluid is supplied to the clutch from radially inward of the clutch through the vertical wall part,
wherein the oil supply passage is configured to supply the hydraulic fluid from the vertical wall part to the radially inward of the clutch through a first oil passage extending in the axial direction via a coupling part between the vertical wall part and the flange part, a second oil passage inside the flange part, connected to the first oil passage and extending in the radial direction, and a third oil passage inside the cylindrical body, connected to the second oil passage and extending in the axial direction, and
wherein a position of the flange part in the axial direction is configured to overlap with a position of the given component in the axial direction.

2. The automatic transmission of claim 1 , wherein the given component is a brake.

3. The automatic transmission of claim 1 ,
wherein the sleeve includes a first sleeve having a first cylindrical body constituting an outer circumferential side of the cylindrical body, and the flange part, and a second sleeve having a second cylindrical body constituting an inner circumferential side of the cylindrical body and attached to an inner surface of the first cylindrical body, and
wherein the third oil passage is formed between the inner surface of the first cylindrical body and an outer surface of the second cylindrical body.

4. The automatic transmission of claim 1 ,
wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and
wherein the oil supply passage includes a plurality of oil supply passages through which hydraulic fluid for engagement is supplied to the plurality of clutches, respectively.

5. The automatic transmission of claim 1 ,
wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and
wherein the oil supply passage includes an oil supply passage through which hydraulic fluid for lubrication is supplied to the plurality of clutches.

6. The automatic transmission of claim 1 , wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve.

7. The automatic transmission of claim 2 ,
wherein the sleeve includes a first sleeve having a first cylindrical body constituting an outer circumferential side of the cylindrical body, and the flange part, and a second sleeve having a second cylindrical body constituting an inner circumferential side of the cylindrical body and attached to an inner surface of the first cylindrical body, and
wherein the third oil passage is formed between the inner surface of the first cylindrical body and an outer surface of the second cylindrical body.

8. The automatic transmission of claim 2 ,
wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and
wherein the oil supply passage includes a plurality of oil supply passages through which hydraulic fluid for engagement is supplied to the plurality of clutches, respectively.

9. The automatic transmission of claim 2 ,
wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and
wherein the oil supply passage includes an oil supply passage through which hydraulic fluid for lubrication is supplied to the plurality of clutches.

10. The automatic transmission of claim 2 , wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve.

11. The automatic transmission of claim 3 ,
wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and
wherein the oil supply passage includes a plurality of oil supply passages through which hydraulic fluid for engagement is supplied to the plurality of clutches, respectively.

12. The automatic transmission of claim 3 ,
wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and
wherein the oil supply passage includes an oil supply passage through which hydraulic fluid for lubrication is supplied to the plurality of clutches.

13. The automatic transmission of claim 3 , wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve.

14. The automatic transmission of claim 4 , wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve.

15. The automatic transmission of claim 5 , wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve.

16. The automatic transmission of claim 7 ,
wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and
wherein the oil supply passage includes a plurality of oil supply passages through which hydraulic fluid for engagement is supplied to the plurality of clutches, respectively.

17. The automatic transmission of claim 7 ,
wherein the clutch includes a plurality of clutches disposed on the first side of the vertical wall part in the axial direction, and
wherein the oil supply passage includes an oil supply passage through which hydraulic fluid for lubrication is supplied to the plurality of clutches.

18. The automatic transmission of claim 17 , wherein a plate configured to receive a return spring of a brake that is the given component is coupled to the vertical wall part, together with the sleeve, by a coupling member configured to couple the sleeve.

Assignees

• Mazda Motor

Inventors

• Ishizaka Tomotaka
• Iwashita Norio
• Ueda Kensuke
• Sasaki Masanori

Classifications

• F16H2200/2012

  with four sets of orbital gears · CPC title

• F16H57/0473

  Friction devices, e.g. clutches or brakes · CPC title

• F16H2200/006

  the gear ratios comprising eight forward speeds · CPC title

• F16H2063/3093

  Final output elements, i.e. the final elements to establish gear ratio, e.g. coupling sleeves or other means establishing coupling to shaft · CPC title

• F16H2057/02095

  Measures for reducing number of parts or components · CPC title