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CN-122029093-A - Brake pad and method of assembling the same

CN122029093ACN 122029093 ACN122029093 ACN 122029093ACN-122029093-A

Abstract

A brake pad (18), the pad (18) comprising a lining (20) and a lining support (24), the lining (20) being made of friction material and being provided with at least one particle collection groove, the lining support (24) being connected to one face (22B) of the lining (20), referred to as a mounting face, wherein a space (29) is provided between the lining support (24) and the mounting face (22B) of the lining (20), in which space (29) a sealing chamber (50) is arranged, the sealing chamber (50) comprising a suction duct (52) for fluid communication with a suction source, wherein the at least one particle collection groove comprises a suction aperture opening into the sealing chamber (50) and in fluid communication with the suction duct.

Inventors

  • Loyk adamkzak
  • Vincent. Lai Delio
  • Adrian mestrey

Assignees

  • 塔拉诺技术公司

Dates

Publication Date
20260512
Application Date
20241014
Priority Date
20231017

Claims (10)

  1. 1. Brake pad (18), the pad (18) comprising a lining (20) and a lining support (24), the lining (20) being made of friction material and having at least one particle collection groove (30, 32, 38, 40, 42), the lining support (24) being connected to one face (22B), called the mounting face, of the lining (20), wherein a space (29) is provided between the lining support (24) and the mounting face (22B) of the lining (20), characterized in that a sealed chamber (50) is arranged in the space (29), the sealed chamber (50) comprising a suction duct (52) for fluid communication with a source of negative pressure, wherein the at least one particle collection groove (30, 32, 38, 40, 42) comprises a suction hole (44) leading to the sealed chamber (50) and in fluid communication with the suction duct.
  2. 2. The brake pad (18) of claim 1, wherein the sealed cavity (50) is welded to the lining support (24) and/or the lining (20).
  3. 3. The brake pad (18) of any of the preceding claims, further comprising a connecting means (66) connecting the sealed cavity (50) to a lining support (24) and/or a lining (20).
  4. 4. The brake pad (18) of any of the preceding claims, wherein the seal cavity (50) is press fit in a space (29) provided between the lining support (24) and the mounting surface (22B) of the lining (24).
  5. 5. The brake pad (18) of any of the preceding claims, characterized in that the sealed chamber comprises a nut (84) welded to the lining support (24) and/or the lining (20), the nut comprising an inner annular surface provided with an internal thread complementary to an external thread on the outer surface of the suction duct (52).
  6. 6. The brake pad (18) of any of the preceding claims, wherein the sealed chamber (50) includes a filler block (60) including a cavity (62) fluidly connecting the suction aperture (44) of the at least one collection groove (30, 32, 38, 40, 42) to the suction duct (52).
  7. 7. The brake pad (18) of claim 6, wherein the filler block (60) is made of silicone and/or friction material of the lining (20).
  8. 8. The brake pad (18) of any of the preceding claims, wherein the seal chamber (50) is made as a single unit with the lining support (24).
  9. 9. A method for assembling a brake pad (18) according to any one of the preceding claims, the method comprising: -providing a gasket (20), a gasket support (24) and a sealing chamber (50); -attaching the lining support (24) to the mounting surface (22B) of the lining (20); -arranging the sealing chamber (50) in a space (29) provided between the pad support (24) and the mounting face (22B) of the pad (20) such that the suction holes (44) of the at least one particle collection channel (30, 32, 38, 40, 42) open into the sealing chamber (50) and are in fluid communication with the suction duct (52).
  10. 10. The method according to claim 9, characterized in that the sealed chamber (50) is arranged in the space (29) by at least one of the following techniques: -welding the sealed chamber (50) to the gasket support (24) and/or to the gasket (20), and/or -Connecting the sealed chamber (50) to the gasket support (24) and/or the gasket (20) by means of a connecting device (66), and/or -Shrink-fitting the sealing chamber (50) between the lining support (24) and the lining (20), and/or -Moulding the patch (20) onto an assembly comprising the patch support (24) and the suction duct (52).

Description

Brake pad and method of assembling the same Technical Field The present disclosure relates to brake pads and methods for assembling such pads. Background Typically, vehicle braking systems include a brake pad that presses against an element rotating about an axis of rotation during a braking phase, thereby braking the vehicle. In particular, in rail vehicles such as trains, trams or subways, braking is achieved by using a hoof Brake, also known as Tread Brake or TBU (Tread Brake Unit). In this type of brake, the brake pads, also known as wear plates or shoes, are pressed against the radially outer surface of the moving wheels of the rail vehicle during the braking phase. The brake shoes of a shoe brake comprise linings made of friction material. The face of the lining that comes into contact with the wheel during the braking phase, called the friction face, wears gradually by abrasion, as does the wheel itself. This produces particles. Since these particles are contaminants, their release into the environment should be limited. For this purpose, the linings are conventionally equipped with particle collection channels that are completely open on the friction surface. The trough is in fluid communication with a source of negative pressure capable of drawing in the collected particles. For example, a pneumatic hose fluidly connects the tank to a source of negative pressure, as described in FR 3087238A. There is a need to develop pads that ensure reliable and leak-free connection between pneumatic hoses and grooves, while not increasing pad size. Disclosure of Invention The present disclosure improves upon the above. For this purpose, a brake pad is proposed, which comprises a lining and a lining support, which is made of friction material and has at least one particle-collecting channel, which is connected to one face of the lining, called the mounting face, wherein a space is provided between the lining support and the mounting face of the lining, characterized in that a sealing chamber is arranged in the space, which sealing chamber comprises a suction duct for fluid communication with a source of underpressure, wherein the at least one particle-collecting channel comprises a suction aperture which opens into the sealing chamber and is in fluid communication with the suction duct. Thus, by sealing the chamber, in particular the suction duct comprised by the chamber, a reliable and sealed fluid connection between the collecting tank and the negative pressure source can be established more simply. Furthermore, since the seal pocket is provided in the space between the lining support and the lining mounting surface, which space is already present in prior art brake pads, the presence of the seal pocket does not increase the overall size of the pad nor does it require changing its geometry relative to known pads. Thus, a leak-proof and reliable fluid connection between the collecting tank and the negative pressure source can be achieved without increasing the overall size or changing the pad geometry with respect to known pads. Moreover, since the seal chamber is designed to be installed in the space between the lining support and the lining mounting face, the maintenance operation of the brake pad remains unchanged. More specifically, the pads installed in the braking system may be replaced with new pads as in the prior art, as described below. The pads are, for example, wear plates (or brake shoes) of a shoe brake (or tread brake, or TBU) of a rail vehicle. Or the pad may be a brake pad for a road vehicle, or a brake pad for a stationary machine having a rotor, such as a wind turbine, or a brake pad for an industrial machine. The pad support may be shaped to be connected to the brake head, for example by a pin configured to pass through at least one aperture provided in the pad support. The lining support may comprise a plate made of metal, for example. In some cases, the plate includes at least one curved region formed by two shoulders, thereby creating the space between the liner support and the liner mounting surface. Advantageously, the curved region may be provided with one hole in each shoulder. Such holes allow the pins of the brake head to pass through. The pin may be mounted for translational movement between a first position and a second position. In the first position, the pin passes through a hole in the lining support, thereby securing the pad to the brake head. In the second position, the pin is not within the bore of the lining support, thereby separating the pad from the brake head, which allows for replacement of the pad. The particles collected in the at least one collecting tank may be produced during vehicle braking phases in which the liner is in contact with the element rotating about the axis of rotation. In particular, the backing may include a face, referred to as a friction face, that opposes the mounting face in a direction substantially perpendicular to the friction face. The frict