WO2021118514A1 - A brake shoe for a railway rolling stock - Google Patents

A brake shoe for a railway rolling stock Download PDF

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Publication number
WO2021118514A1
WO2021118514A1 PCT/UA2020/000062 UA2020000062W WO2021118514A1 WO 2021118514 A1 WO2021118514 A1 WO 2021118514A1 UA 2020000062 W UA2020000062 W UA 2020000062W WO 2021118514 A1 WO2021118514 A1 WO 2021118514A1
Authority
WO
WIPO (PCT)
Prior art keywords
frames
friction element
backing plate
wire
shoe
Prior art date
Application number
PCT/UA2020/000062
Other languages
French (fr)
Inventor
Kostiantyn Oleksiiovych YEFYMENKO
Vitalii Myhailovych SMYK
Oleg Vasyl'ovych SAVCHUK
Yehor V'iacheslavovych MOSKALENKO
Iryna Mykolaivna MELNICHUK
Original Assignee
Yefymenko Kostiantyn Oleksiiovych
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yefymenko Kostiantyn Oleksiiovych filed Critical Yefymenko Kostiantyn Oleksiiovych
Publication of WO2021118514A1 publication Critical patent/WO2021118514A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D49/00—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like
    • F16D49/16—Brakes with two brake-blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H1/00—Applications or arrangements of brakes with a braking member or members co-operating with the periphery of the wheel rim, a drum, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
    • F16D65/09—Pivots or supporting members therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—Pivots or supporting members therefor
    • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
    • F16D65/0971—Resilient means interposed between pads and supporting members or other brake parts transmitting brake actuation force, e.g. elements interposed between brake piston and pad
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—Pivots or supporting members therefor
    • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
    • F16D65/0973—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
    • F16D65/0974—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis
    • F16D65/0975—Springs made from wire
    • F16D65/0976—Springs made from wire acting on one pad only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D69/0416—Attachment of linings specially adapted for curved linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/0441—Mechanical interlocking, e.g. roughened lining carrier, mating profiles on friction material and lining carrier

Definitions

  • the invention relates to a railway transport, namely to brake shoes for a railway rolling stock.
  • a brake shoe is a part of a brake system and a main operating component thereof. It is the brake shoe that, due to interaction with a wheel running surface, transforms pressing forces into a braking torque and creates a braking force that is required to regulate a speed of the rolling stock up to its stoppage.
  • a shoe of a railway vehicle comprising a composite friction element and a wire backing plate in the form of outer and inner closed frames, wherein a joint between ends of the wire of one of the frames is arranged at a half of the wire backing plate in the vicinity of an outer side surface of the shoe, and a joint between ends of the wire of another frame is arranged at a half of the wire backing plate in the vicinity of an inner side surface of the shoe (RU 2340805 Cl dated 10.12.2008).
  • Drawbacks of the known solution lie in an increased possibility of destruction of a rear portion of the shoe in case of operational exposures due to lack of unclosed portions of the frames formed by ends of the wires, as well as due to arrangement of the joints of the wires of one of the frames at the half of the wire backing plate in the vicinity of the outer side surface of the shoe.
  • a brake shoe of a railroad vehicle comprising a composite friction element having a rear portion that has a wire backing plate pressed therein, the wire backing plate is made of two interconnected frames, each of the frames is bent of a wire. Side sections of the wire are connected so that the thickness of the wire backing plate increases along the thickness of the shoe. In one of the frames, a short side section is superimposed onto a long side section from the side of the working surface of the shoe. In another frame, the short side section is superimposed onto the long side section from the side of the rear surface of the shoe (RU 2414369 Cl dated 20.03.2011).
  • a brake shoe of a railroad vehicle comprising a polymeric friction element that is fixed on a metal backing plate made in the form of a perforated butt plate that is coupled to a wire frame.
  • the length of the perforated butt plate exceeds the length of the wire frame and asymptotically tends to the length of the shoe (RU 2253056 Cl dated 27.05.2005).
  • a brake shoe of a railroad vehicle comprising a composite friction element, a wire backing plate that is pressed into the composite friction element of a rear side of the shoe, two closed frames along the shoe perimeter, the inner portions of the frames are mutually overlapped and folded outwardly from the rear portion of the shoe, thereby forming an ear for passing a forelock, a solid insert that is arranged in a central portion of the shoe and pressed into the composite friction element.
  • the rear side of said brake shoe comprises a metal grid that is pressed into the composite friction element, the insert in an upper non-working portion has a gap from its rear side to pass the tag, and brackets that are symmetrically arranged along the length of the insert from each side thereof, wherein the upper non-working portion of the insert is inserted into the wire backing plate and clamped therein (RU 69597 U1 dated 27.12.2007) at an end of the wire that forms the frames.
  • a drawback of the mentioned technical solution lies in a reduction of operational characteristics due to a possibility of destruction of the rear portion of the shoe due to simultaneous destruction of both wire frames in junctions of their front sections under the action of impact loads.
  • a brake shoe for a railroad wheel is known, the brake shoe having a cross- section with a bidirectional laminate structure, which includes a core element of a high-friction material for contacting the wheel and at least one low-friction element that is positioned on the high- friction material and a side element that is in contact with the wheel flange in order to prevent the wheel from contact with the high friction material (US 5341904 A dated 30.08.1994).
  • a drawback of the known technical solution lies in the fact that is lacks a wire backing plate, while the friction element is fixed directly to the metal backing plate, in case of such fixation there is a high probability that the friction element will be separated during braking.
  • the closest technical solution of the claimed invention is a brake shoe for a railway rolling stock, the brake shoe comprising a composite friction element, wherein a metal backing plate is pressed into a rear portion thereof, the metal backing plate consists of two interconnected narrow and broad frames made of a wire, whose inner parts are mutually overlapped and folded outwardly of a rear portion of the shoe, thereby forming an ear for passing a forelock.
  • Both frames are made of low carbon steel wire, its resistance to tear is provided by bending the wire and connecting the ends thereof at an angle of 90° at points of contact, thereby forming closed parts in both frames, wherein both frames contain no outwardly protruding wire ends (UA 102172 U dated 26.10.2015).
  • a drawback of the known technical solution lies in absence of outwardly protruding wire ends that provokes an asymmetrical arrangement of the pressed metal backing plate relative to a longitudinal axis of symmetry of the rear side of the brake shoe. In turn, this may lead to non-uniform distribution of the pressing force followed by destruction of the shoe.
  • the invention is based on a task of creating a brake shoe for a railway rolling stock, the shoe having an improve wire backing plate with characteristics that will enable to reduce a probability of destruction of the rear portion of the shoe and to enhance its operational characteristics, as well as to prevent deformations of the shoe in the process of its usage.
  • the set task is resolved as follows.
  • a brake shoe for a railway rolling stock comprising a metal backing plate having a composite friction element arranged therein, the friction element having a rear surface with a backing plate pressed therein, the backing plate consisting of two interconnected wire frames of a different area, which have inner portions that are mutually overlapped and folded outwardly from the rear surface of the shoe, thereby forming an ear for passing a forelock, according to the invention, the frames form an angle of 165 ⁇ 15° between each other in the place of the overlap, outer portions of the frames have protrusions in longitudinal and transverse directions relative to the rear surface of the friction element, which are formed by ends of the wire in the places of its junction, a ratio of areas of the frames is from 1.05:1 to 1.35:1, wherein the overall area of the frames is 0.75-0.95 of the rear surface of the friction element, and the wire backing plate is arranged at a height of 1-10 mm from the rear surface of the friction element.
  • a distance from the outer portions of the frames to front and rear surfaces of the friction element is 1-35 mm, thereby reducing a risk of separation of the friction element from the metal backing plate.
  • the protrusions of the frames equal to 0.5-7 mm, and the ends of the wire, which form the frames, are joint by welding.
  • the welded ends of the wire, which form the frames are in contact with the metal backing plate of the shoe, thereby acting as a damper for impact loads during braking.
  • the structural features of the frames prevent the separation of the side surfaces of the friction element from the metal backing plate of the shoe, as well as provide a symmetrical arrangement of the metal backing plate relative to the longitudinal axis of symmetry of the rear area of the shoe.
  • the contact of the welded ends of the frames with the metal backing plate enables to reduce excessive oscillations of the friction element during braking by acting as a damper.
  • the selected height of arrangement of the metal backing plate provides a uniform transfer of the braking force along the entire surface of the shoe, thereby neutralizing a possible occurrence of a concentration of stresses, which exceed a breakdown point of the shoe and may lead to destruction thereof.
  • the set of the technical solutions, which are used enables to reduce the probability of destruction of the rear portion of the shoe and to improve its operational characteristics, as well as to prevent deformation of the shoe during the usage process.
  • Fig. 1 is a general view of the brake shoe
  • Fig. 2 is a top view of the brake shoe
  • Fig. 3 is a side view of the wire backing plate
  • Fig. 4 is a top view of the wire.
  • the brake shoe for a railway rolling stock comprises a metal backing plate 1 having a composite friction element 2 arranged therein, the friction element having a rear surface with a backing plate 3 pressed therein, the backing plate consisting of two interconnected wire frames 4 of a different area, inner portions of the wire backing plate 3 are mutually overlapped and folded outwardly from the rear surface of the shoe, thereby forming an ear 5 for passing a forelock 6.
  • Surfaces of the frames 4 form an angle 7 between each other in the place of the overlap.
  • Outer portions of the frames 4 have protrusions 8 in longitudinal and transverse directions relative to the rear surface of the friction element 2.
  • the protrusions 8 are formed by overlapping one end of the wire onto another one, the outer portions of the frames 4 are coupled between each other by means of a contact welding method. Therewith, the welded ends of the frames 4 are in a contact with the metal backing plate 1 of the shoe. Also, the shoe has a distance 9 from the outer surfaces of the frame 4 to the rear surface of the friction element 2, wherein the overall area of the frames 4 is 0.75-0.95 of the rear surface of the friction element 2, and the wire backing plate 3 is arranged at a height of 1-10 mm from the rear surface of the shoe.
  • the brake shoe for a railway rolling stock may be manufactured by known methods using known punching, welding, pressing of composite mixtures, thermal processing and machining technologies.
  • the claimed invention increases a reinforcing ability of the brake shoe due to the wire backing plate that is pressed into the rear surface of the friction element and prevents the destruction of the shoe in case of mechanical impacts during the usage process.
  • the wire backing plate consisting of two interconnected frames having different areas enhances the reinforcement of the brake shoe during the operational loads. This results in increase of safety when using the brake shoe.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention relates to a railway transport, namely to brake shoes for a railway rolling stock. A brake shoe for a railway rolling stock, the brake shoe comprising a metal backing plate having a composite friction element arranged therein, the friction element having a rear surface with a backing plate pressed therein, the backing plate consisting of two interconnected wire frames of a different area, which have inner portions that are mutually overlapped and folded outwardly from the rear surface of the shoe, thereby forming an ear for passing a forelock, according to the invention, the frames form an angle of 165±5° between each other in the place of the overlap, outer portions of the frames have protrusions in longitudinal and transverse directions relative to the rear surface of the friction element, which are formed by ends of the wire in the places of its junction, a ratio of areas of the frames is from 1.05:1 to 1.35:1, wherein the overall area of the frames is 0.75-0.95 of the rear surface of the friction element, and the wire backing plate is arranged at a height of 1-10 mm from the rear surface of the friction element.

Description

A brake shoe for a railway rolling stock
Field of the invention
The invention relates to a railway transport, namely to brake shoes for a railway rolling stock.
Prior art
A brake shoe is a part of a brake system and a main operating component thereof. It is the brake shoe that, due to interaction with a wheel running surface, transforms pressing forces into a braking torque and creates a braking force that is required to regulate a speed of the rolling stock up to its stoppage.
A shoe of a railway vehicle is known, the shoe comprising a composite friction element and a wire backing plate in the form of outer and inner closed frames, wherein a joint between ends of the wire of one of the frames is arranged at a half of the wire backing plate in the vicinity of an outer side surface of the shoe, and a joint between ends of the wire of another frame is arranged at a half of the wire backing plate in the vicinity of an inner side surface of the shoe (RU 2340805 Cl dated 10.12.2008).
Drawbacks of the known solution lie in an increased possibility of destruction of a rear portion of the shoe in case of operational exposures due to lack of unclosed portions of the frames formed by ends of the wires, as well as due to arrangement of the joints of the wires of one of the frames at the half of the wire backing plate in the vicinity of the outer side surface of the shoe.
Also, a brake shoe of a railroad vehicle is known, the shoe comprising a composite friction element having a rear portion that has a wire backing plate pressed therein, the wire backing plate is made of two interconnected frames, each of the frames is bent of a wire. Side sections of the wire are connected so that the thickness of the wire backing plate increases along the thickness of the shoe. In one of the frames, a short side section is superimposed onto a long side section from the side of the working surface of the shoe. In another frame, the short side section is superimposed onto the long side section from the side of the rear surface of the shoe (RU 2414369 Cl dated 20.03.2011).
Also, a brake shoe of a railroad vehicle is known, the brake shoe comprising a polymeric friction element that is fixed on a metal backing plate made in the form of a perforated butt plate that is coupled to a wire frame. Therewith, the length of the perforated butt plate exceeds the length of the wire frame and asymptotically tends to the length of the shoe (RU 2253056 Cl dated 27.05.2005).
Also, a brake shoe of a railroad vehicle is known, the brake shoe comprising a composite friction element, a wire backing plate that is pressed into the composite friction element of a rear side of the shoe, two closed frames along the shoe perimeter, the inner portions of the frames are mutually overlapped and folded outwardly from the rear portion of the shoe, thereby forming an ear for passing a forelock, a solid insert that is arranged in a central portion of the shoe and pressed into the composite friction element. The rear side of said brake shoe comprises a metal grid that is pressed into the composite friction element, the insert in an upper non-working portion has a gap from its rear side to pass the tag, and brackets that are symmetrically arranged along the length of the insert from each side thereof, wherein the upper non-working portion of the insert is inserted into the wire backing plate and clamped therein (RU 69597 U1 dated 27.12.2007) at an end of the wire that forms the frames.
A drawback of the mentioned technical solution lies in a reduction of operational characteristics due to a possibility of destruction of the rear portion of the shoe due to simultaneous destruction of both wire frames in junctions of their front sections under the action of impact loads. A brake shoe for a railroad wheel is known, the brake shoe having a cross- section with a bidirectional laminate structure, which includes a core element of a high-friction material for contacting the wheel and at least one low-friction element that is positioned on the high- friction material and a side element that is in contact with the wheel flange in order to prevent the wheel from contact with the high friction material (US 5341904 A dated 30.08.1994).
A drawback of the known technical solution lies in the fact that is lacks a wire backing plate, while the friction element is fixed directly to the metal backing plate, in case of such fixation there is a high probability that the friction element will be separated during braking.
The closest technical solution of the claimed invention is a brake shoe for a railway rolling stock, the brake shoe comprising a composite friction element, wherein a metal backing plate is pressed into a rear portion thereof, the metal backing plate consists of two interconnected narrow and broad frames made of a wire, whose inner parts are mutually overlapped and folded outwardly of a rear portion of the shoe, thereby forming an ear for passing a forelock. Both frames are made of low carbon steel wire, its resistance to tear is provided by bending the wire and connecting the ends thereof at an angle of 90° at points of contact, thereby forming closed parts in both frames, wherein both frames contain no outwardly protruding wire ends (UA 102172 U dated 26.10.2015).
A drawback of the known technical solution lies in absence of outwardly protruding wire ends that provokes an asymmetrical arrangement of the pressed metal backing plate relative to a longitudinal axis of symmetry of the rear side of the brake shoe. In turn, this may lead to non-uniform distribution of the pressing force followed by destruction of the shoe.
Summary of the invention The invention is based on a task of creating a brake shoe for a railway rolling stock, the shoe having an improve wire backing plate with characteristics that will enable to reduce a probability of destruction of the rear portion of the shoe and to enhance its operational characteristics, as well as to prevent deformations of the shoe in the process of its usage.
The set task is resolved as follows.
A brake shoe for a railway rolling stock, the brake shoe comprising a metal backing plate having a composite friction element arranged therein, the friction element having a rear surface with a backing plate pressed therein, the backing plate consisting of two interconnected wire frames of a different area, which have inner portions that are mutually overlapped and folded outwardly from the rear surface of the shoe, thereby forming an ear for passing a forelock, according to the invention, the frames form an angle of 165±15° between each other in the place of the overlap, outer portions of the frames have protrusions in longitudinal and transverse directions relative to the rear surface of the friction element, which are formed by ends of the wire in the places of its junction, a ratio of areas of the frames is from 1.05:1 to 1.35:1, wherein the overall area of the frames is 0.75-0.95 of the rear surface of the friction element, and the wire backing plate is arranged at a height of 1-10 mm from the rear surface of the friction element.
According to an embodiment of the invention, a distance from the outer portions of the frames to front and rear surfaces of the friction element is 1-35 mm, thereby reducing a risk of separation of the friction element from the metal backing plate.
Therewith, the protrusions of the frames equal to 0.5-7 mm, and the ends of the wire, which form the frames, are joint by welding. According to an embodiment of the invention, the welded ends of the wire, which form the frames, are in contact with the metal backing plate of the shoe, thereby acting as a damper for impact loads during braking.
Technical effect
It has been experimentally found that the arrangement of the frames, which are pressed into the rear portion of the friction element at the angle of 165±15°, enables to increase the contact area between the friction element and the wheel during braking, wherein the different area of the frames reduces the load onto the brake shoe and prevents the separation of the friction element from the metal backing plate due to the fact that the loads are distributed uniformly along the entire working surface of the friction element of the shoe, thereby reducing a pressure per unit of area onto the shoe. The structural features of the frames, namely the longitudinal and transverse protrusions, prevent the separation of the side surfaces of the friction element from the metal backing plate of the shoe, as well as provide a symmetrical arrangement of the metal backing plate relative to the longitudinal axis of symmetry of the rear area of the shoe. The contact of the welded ends of the frames with the metal backing plate enables to reduce excessive oscillations of the friction element during braking by acting as a damper. The selected height of arrangement of the metal backing plate provides a uniform transfer of the braking force along the entire surface of the shoe, thereby neutralizing a possible occurrence of a concentration of stresses, which exceed a breakdown point of the shoe and may lead to destruction thereof. The set of the technical solutions, which are used, enables to reduce the probability of destruction of the rear portion of the shoe and to improve its operational characteristics, as well as to prevent deformation of the shoe during the usage process. Brief description of the drawings
The proposed invention is illustrated by the following exemplary embodiment thereof and by the corresponding drawings in which:
Fig. 1 is a general view of the brake shoe,
Fig. 2 is a top view of the brake shoe,
Fig. 3 is a side view of the wire backing plate,
Fig. 4 is a top view of the wire.
The drawings that illustrate the claimed invention, as well as the stated particular embodiment are merely exemplary in nature and are in no way intended to limit the claims appended hereto, but to explain the essence of the invention.
Detailed description
The brake shoe for a railway rolling stock comprises a metal backing plate 1 having a composite friction element 2 arranged therein, the friction element having a rear surface with a backing plate 3 pressed therein, the backing plate consisting of two interconnected wire frames 4 of a different area, inner portions of the wire backing plate 3 are mutually overlapped and folded outwardly from the rear surface of the shoe, thereby forming an ear 5 for passing a forelock 6. Surfaces of the frames 4 form an angle 7 between each other in the place of the overlap. Outer portions of the frames 4 have protrusions 8 in longitudinal and transverse directions relative to the rear surface of the friction element 2. The protrusions 8 are formed by overlapping one end of the wire onto another one, the outer portions of the frames 4 are coupled between each other by means of a contact welding method. Therewith, the welded ends of the frames 4 are in a contact with the metal backing plate 1 of the shoe. Also, the shoe has a distance 9 from the outer surfaces of the frame 4 to the rear surface of the friction element 2, wherein the overall area of the frames 4 is 0.75-0.95 of the rear surface of the friction element 2, and the wire backing plate 3 is arranged at a height of 1-10 mm from the rear surface of the shoe.
The brake shoe for a railway rolling stock may be manufactured by known methods using known punching, welding, pressing of composite mixtures, thermal processing and machining technologies.
The claimed invention, according to the set of technical features, increases a reinforcing ability of the brake shoe due to the wire backing plate that is pressed into the rear surface of the friction element and prevents the destruction of the shoe in case of mechanical impacts during the usage process. The wire backing plate consisting of two interconnected frames having different areas enhances the reinforcement of the brake shoe during the operational loads. This results in increase of safety when using the brake shoe.

Claims

1. A brake shoe for a railway rolling stock, the brake shoe comprising a metal backing plate having a composite friction element arranged therein, the friction element having a rear surface with a backing plate pressed therein, the backing plate consisting of two interconnected wire frames of a different area, which have inner portions that are mutually overlapped and folded outwardly from the rear surface of the shoe, thereby forming an ear for passing a forelock, characterized in that the frames form an angle of 165±15° between each other in the place of the overlap, outer portions of the frames have protrusions in longitudinal and transverse directions relative to the rear surface of the friction element, which are formed by ends of the wire in the places of its junction, a ratio of areas of the frames is from 1.05:1 to 1.35:1, wherein the overall area of the frames is 0.75-0.95 of the rear surface of the friction element, and the wire backing plate is arranged at a height of 1-10 mm from the rear surface of the friction element.
2. The brake shoe of claim 1, characterized in that the distance from the outer portions of the frames to front and side surfaces of the friction element is 1 - 35 mm.
3. The brake shoe of claim 1, characterized in that dimensions of the protrusions of the frames equal to 0.5-7 mm.
4. The brake shoe of claim 1, characterized in that the ends of the wire that forms the frames are coupled by welding.
5. The brake shoe of claim 1, characterized in that the welded ends of the wire, which form the frames, are in a contact with the metal backing plate of the shoe.
PCT/UA2020/000062 2019-12-13 2020-06-19 A brake shoe for a railway rolling stock WO2021118514A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UAA201911900 2019-12-13
UAA201911900A UA125148C2 (en) 2019-12-13 2019-12-13 Brake pad for rolling stock of railway transport

Publications (1)

Publication Number Publication Date
WO2021118514A1 true WO2021118514A1 (en) 2021-06-17

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PCT/UA2020/000062 WO2021118514A1 (en) 2019-12-13 2020-06-19 A brake shoe for a railway rolling stock

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LT (1) LT6850B (en)
LV (1) LV15572A (en)
UA (1) UA125148C2 (en)
WO (1) WO2021118514A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341904A (en) 1991-07-02 1994-08-30 Amsted Industries Incorporated Railroad brake shoe
RU2099221C1 (en) * 1996-06-17 1997-12-20 Акционерное общество открытого типа Научно-исследовательский и конструкторско-технологический институт асбестовых технических изделий - Фирма "ТИИР" Railway vehicle brake shoe
RU2253056C1 (en) 2004-07-23 2005-05-27 Открытое акционерное общество "Завод фрикционных и термостойких материалов" (ОАО "Фритекс") Braking block for railway vehicle
RU69597U1 (en) 2007-07-20 2007-12-27 Открытое акционерное общество "Завод фрикционных и термостойких материалов", ОАО "ФРИТЕКС" RAILWAY BRAKE PAD
RU2340805C1 (en) 2007-07-20 2008-12-10 Открытое акционерное общество "Завод фрикционных и термостойких материалов", ОАО "ФРИТЕКС" Brake block of railway vehicle
RU2414369C1 (en) 2009-12-15 2011-03-20 Открытое акционерное общество "Термостойкие изделия и инженерные разработки" (ОАО "ТИИР") Railway vehicle braking clamp
DE202011003771U1 (en) * 2010-04-05 2011-05-26 Oao Fritex Brake pad for railway vehicles
UA102172U (en) 2015-02-27 2015-10-26 Товариство З Обмеженою Відповідальністю "Білоцерківський Завод "Трібо" Brake block for railway rolling stock
RU186770U1 (en) * 2018-07-30 2019-01-31 Открытое акционерное общество "Уральский завод авто-текстильных изделий" (ОАО "УралАТИ") RAILWAY BRAKE PAD

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341904A (en) 1991-07-02 1994-08-30 Amsted Industries Incorporated Railroad brake shoe
RU2099221C1 (en) * 1996-06-17 1997-12-20 Акционерное общество открытого типа Научно-исследовательский и конструкторско-технологический институт асбестовых технических изделий - Фирма "ТИИР" Railway vehicle brake shoe
RU2253056C1 (en) 2004-07-23 2005-05-27 Открытое акционерное общество "Завод фрикционных и термостойких материалов" (ОАО "Фритекс") Braking block for railway vehicle
RU69597U1 (en) 2007-07-20 2007-12-27 Открытое акционерное общество "Завод фрикционных и термостойких материалов", ОАО "ФРИТЕКС" RAILWAY BRAKE PAD
RU2340805C1 (en) 2007-07-20 2008-12-10 Открытое акционерное общество "Завод фрикционных и термостойких материалов", ОАО "ФРИТЕКС" Brake block of railway vehicle
RU2414369C1 (en) 2009-12-15 2011-03-20 Открытое акционерное общество "Термостойкие изделия и инженерные разработки" (ОАО "ТИИР") Railway vehicle braking clamp
DE202011003771U1 (en) * 2010-04-05 2011-05-26 Oao Fritex Brake pad for railway vehicles
UA102172U (en) 2015-02-27 2015-10-26 Товариство З Обмеженою Відповідальністю "Білоцерківський Завод "Трібо" Brake block for railway rolling stock
RU186770U1 (en) * 2018-07-30 2019-01-31 Открытое акционерное общество "Уральский завод авто-текстильных изделий" (ОАО "УралАТИ") RAILWAY BRAKE PAD

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UA125148C2 (en) 2022-01-19
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LV15572A (en) 2021-06-20

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