Brake lever for a drum brake arrangement, said brake lever being designed for transmitting the movement of a cylinder rod to a brake shaft

Patent metadata

Field	Value
Publication number	US-11892047-B2
Application number	US-202117450111-A
Country	US
Kind code	B2
Filing date	Oct 6, 2021
Priority date	Oct 7, 2020
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

The invention relates to a brake lever (20) for a drum brake arrangement (12), said brake lever being designed for transmitting the movement of a cylinder rod (14) to a brake shaft (22), wherein the brake lever (20) comprises a first portion (20a) delimiting a hole (24) for fitting the brake shaft (22) and a second portion (20b), which is configured to be pivotally connected to the cylinder rod (14) and wherein the first portion and the second portion are offset from each other with respect to a central axis (X24) of the hole (24). The brake lever further includes a stiffening member (28) that extends along a direction (L1) contained inside a plane (P1) perpendicular to the central axis (X24) of the hole and that includes an orifice (32) for fitting the brake shaft (22).

First claim

The invention claimed is:

1. A brake lever for a drum brake arrangement, said brake lever being designed for transmitting the movement of a cylinder rod to a brake shaft, wherein the brake lever comprises a first portion delimiting a hole for fitting the brake shaft, and a second portion which is configured to be pivotally connected to the cylinder rod, and wherein the first portion and the second portion are offset from each other with respect to a central axis of the hole,
the brake lever further includes a central portion extending in a straight line between the first and second portions, the central portion extending obliquely with respect to the second portion, a stiffening member that extends along a direction contained inside a plane perpendicular to the central axis of the hole, and includes an orifice for fitting the brake shaft, and an automatic or manual slack adjuster,
wherein the stiffening member is spaced apart from the slack adjuster.

2. The brake lever according to claim 1 , wherein the stiffening member extends in a straight line perpendicular to the central axis of the hole.

3. The brake lever according to claim 1 , wherein the stiffening member extends in a curved manner.

4. The brake lever according to claim 1 , wherein the first and second portions are end portions of the brake lever.

5. The brake lever according to claim 1 , wherein the second portion includes a circular bore for receiving a pin.

6. The brake lever according to claim 1 , wherein the offset between the first portion and the second portion is less than or equal to 70 mm.

7. The brake lever according to claim 1 , wherein the orifice and the hole have the same diameter.

8. The brake lever according to claim 1 , wherein the orifice is a through hole of circular shape.

9. The brake lever according to claim 1 , wherein the orifice is delimited by a casing extending axially between the stiffening member and the first portion.

10. A brake lever is according to claim 1 , including a drum brake arrangement, comprising a brake cylinder provided with a push rod, a brake shaft and a brake lever for transmitting the movement of the push rod to the brake shaft.

11. A heavy-duty vehicle, comprising at least one drum brake arrangement according to claim 1 .

Assignees

• Volvo Truck Corp

Inventors

• Sandrasekaran Ramachandran
• Alavandar Sundar Vignesh

Classifications

• F16D65/60 Primary

  for angular adjustment of two concentric parts of the brake control systems · CPC title

• F16D65/50

  for angular adjustment of two concentric parts of the brake control system · CPC title

• B60T17/22

  Devices for monitoring or checking brake systems; Signal devices · CPC title

• F16D2125/30

  acting on two or more cam followers, e.g. S-cams · CPC title

• F16D51/22 Primary

  mechanically actuated · CPC title