S-cam brake

Patent metadata

Field	Value
Publication number	US-11906007-B2
Application number	US-202117517154-A
Country	US
Kind code	B2
Filing date	Nov 2, 2021
Priority date	Jul 27, 2021
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

An S-cam brake including a brake chamber to which compressed air is supplied; a slack adjuster rotatably connecting to the brake chamber; an S-cam unit having an S-cam connecting to and rotating around the slack adjuster; and a drum having a lining generating braking force with widening according to rotation of the S-cam is provided, wherein the brake chamber includes an upper housing having an air supply port through which compressed air is introduced; a lower housing coupled to the upper housing to form an internal space; a diaphragm having edges fixed to the upper housing and the lower housing and deformed by compressed air; a piston disposed to contact the diaphragm and move linearly; a piston push rod extending from the piston and having one end connected to the slack adjuster; and a spring having one end supported by the piston and the other end supported by the lower housing, wherein a thickness of the upper housing is greater than a thickness of the lower housing.

First claim

What is claimed is:

1. An S-cam brake comprising:
a brake chamber to which compressed air is supplied;
a slack adjuster rotatably connected to the brake chamber;
an S-cam unit having an S-cam connected to and rotating around the slack adjuster; and
a drum having a lining generating braking force with widening according to rotation of the S-cam,
wherein the brake chamber comprises:
an upper housing having an air supply port through which the compressed air is introduced;
a lower housing coupled to the upper housing to form an internal space;
a diaphragm having edges fixed to the upper housing and the lower housing and deformed by the compressed air;
a piston disposed to contact the diaphragm and move linearly;
a piston push rod extending from the piston and having one end connected to the slack adjuster; and
a spring having one end supported by the piston and the other end supported by the lower housing,

wherein a thickness of the upper housing is greater than a thickness of the lower housing,
wherein a bottom surface of the upper housing comprises a channel connected to the air supply port, and
wherein the channel is formed of a groove having a ‘+’ shape, in bottom view.

2. The S-cam brake of claim 1 , wherein a weight of the upper housing is 8.0 Kg to 9.7 Kg.

3. The S-cam brake of claim 1 , wherein a thickness of a central portion of the upper housing is 30 mm to 36 mm.

4. The S-cam brake of claim 1 , wherein the upper housing is formed of a casting containing an iron component.

5. The S-cam brake of claim 1 , wherein the diaphragm is disposed to contact the bottom surface of the upper housing when the compressed air is not supplied, and the channel forms a space between the bottom surface of the upper housing and the diaphragm.

6. The S-cam brake of claim 1 , wherein the channel has a width of 4 mm to 8 mm, a depth of 4 mm to 8 mm, and a length of 80 mm to 100 mm.

7. The S-cam brake of claim 1 , wherein the channel is formed of a groove having a circular or polygonal shape, in bottom view.

8. The S-cam brake of claim 1 , wherein the channel is formed of a groove having a polygonal funnel shape in which a lower portion thereof is wider than an upper portion thereof.

9. An S-cam brake comprising:
a brake chamber to which compressed air is supplied;
a slack adjuster rotatably connected to the brake chamber;
an S-cam unit having an S-cam connected to and rotating around the slack adjuster; and
a drum having a lining generating braking force with widening according to rotation of the S-cam,
wherein the brake chamber comprises:
an upper housing having an air supply port through which the compressed air is introduced;
a lower housing coupled to the upper housing to form an internal space; and
a diaphragm having edges fixed to the upper housing and the lower housing and deformed by the compressed air,

wherein a weight of the upper housing is 8.0 Kg to 9.7 Kg,
wherein a bottom surface of the upper housing comprises a channel connected to the air supply port, and
wherein the channel is formed of a groove having a ‘+’ shape, in bottom view.

10. The S-cam brake of claim 9 , wherein the diaphragm is disposed to contact a bottom surface of the upper housing when the compressed air is not supplied, and a channel forms a space between the bottom surface of the upper housing and the diaphragm.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Han Sang Weol
• Jin Jung Hoon
• Kim Yoon Hwan

Classifications

• F16D65/22 Primary

  adapted for pressing members apart {, e.g. for drum brakes} · CPC title

• F16D51/22 Primary

  mechanically actuated · CPC title

• F16D51/24

  fluid actuated · CPC title

• F16D65/0006

  Noise or vibration control · CPC title

• F16D65/38

  Slack adjusters · CPC title