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Introduction of Trailer Brake Shoes

Views: 0     Author: Wondee Autoparts     Publish Time: 2021-12-14      Origin: Wondee Autoparts

A trailer brake shoe refers to a part that expands outward under the force of camshaft or push rod to press the brake drum and play the role of braking. It is installed on the axle through the brake bracket. It is one of the key safety components in the automobile braking system.

As shown in Figure 1 below. A brake shoe is a matching part of internal tension shoe friction brakes. And the other matching part is a brake drum. When working, it bears the thrust of camshaft, the reverse force, tangential force and support reaction force of external brake drum. It shall have the strength and appropriate stiffness, and the supporting brake lining on the brake shoe shall have as high and stable friction coefficient as possible.

Drum type brake system for trailers and trucks

Figure 1. Drum type brake system for trailers and trucks


Brake shoes are widely used on axles of semi-trailers.


As shown in Figure 2 below. The brake shoe assembly is mainly composed of brake shoes, brake linings and rivets. The brake linings are riveted to the brake shoes through rivets, and the brake shoes are composed of rib plates and panels.

A brake shoe for semi trailers

Figure 2. A brake shoe for semi trailers from a China supplier/WONDEE Autoparts


It is mainly introduced from the following aspects:


1. Classification of brake shoes


(1) Casting brake shoes


As shown in Figure 3 below. This kind of brake shoe is integrally formed by casting process, which has the following advantages over pressing and welding brake shoe:


① Good product consistency. The casting process can ensure the consistency of products.


② The product has strong rigidity. This can avoid the problem of weak brakes to a certain extent. Heavy-duty trucks generally use cast brake shoes.


With the further development of automobile lightweight and the improvement of environmental protection requirements, the brake shoe is gradually converted to pressing and welding process.

铸造制动蹄2铸造制动蹄4Casting brake shoes

Figure 3. Casting brake shoes from a China supplier/WONDEE Autoparts


(2) Pressing and welding brake shoes


As shown in Figure 4 below. This kind of brake shoe is made of steel plates under pressing and welding process, with high market share. Compared with the traditional casting process, it has the following advantages:


① Light weight. Under the same specifications, the brake shoe is about 20% lighter than the cast brake shoe, which is more in line with the development trend of automobile lightweight.

② Better performance. Because the pressing and welding brake shoes

are made of steel plates, the steel plates have a certain elasticity. During braking, the brake lining fits more closely with the brake drum, and the braking effect is better. At the same time, due to the light weight of the brake shoe, the braking reaction time is shortened.


③ The unequal thickness design of brake lining can be realized. The brake lining is more fully utilized to improve the service life of the brake lining.


④ Low manufacturing cost and high production efficiency. The pressing and welding process is relatively simple and the processing cycle is short, which can avoid the production pressure required by mass casting blanks.

⑤ Good social benefits. Pressing and welding process replaces casting process, which has low environmental pollution only.

Pressing and welding brake shoes

Figure 4. Pressing and welding brake shoes from a China supplier/WONDEE Autoparts


2. Technical parameters of brake shoes


As shown in Figure 5 below. The main technical parameters of brake drum shoes are as follows:

Schematic diagram of a brake shoe parameters

Figure 5. Schematic diagram of a brake shoe parameters


(1) A:Center distance between support pin and roller pin

(2) B:Brake shoe width

(3) H:Center height

(4) R:Radius of braking surface

(5) D1:Diameter of support pin

(6) D2:Diameter of roller pin


3. Selection of brake shoes


How to select the brake shoe correctly, it can be determined from the following aspects:


(1) Determine the products according to the OEM numbers of automobile manufacturers, axle manufacturers or brake shoe manufacturers.


See Table 1.below for Common Brake Shoe OEM Numbers of Well-known Manufacturers:

BRAKE SHOE MODELS

OEM

REF. NUMBERS



BPW180(old)

05.091.26.64.2


BPW180(new)

05.091.46.17.0


BPW200(old)

05.091.27.54.2


BPW200(new)

05.091.27.83.0


BPW220(new)

05.091.28.29.0


SAF180(old)

3.054.0052.00


SAF200(old)

3.054.0053.00


4515Q

152.05.533


4515E

150.25.412


4515FS

A-JAO508-001


4515

Same as Fuwa's


4551Q

152.05.191


4551E

152.00.007


4551

Same as Fuwa's


4707

152.24.724


4709

EATON819707


4311E

EATON805442
EATON805460


4524Q

MERITOR A3222E1383


4702

MERITOR A3222M2223


1443E

EATON807685


1308Q

MERITOR A3222F1982


1308E

MERITOR A322201837
EATON 1005840


1308P



4516Q



4516



4514

MERITOR   A3222C1381


11.5 YORK



11.5 Fuwa



3502550



3502560




(2) Determine the products according to the basic parameters of brake shoes

Referring to figure 5, the technical parameters of common brake shoes are shown in Table 2 below.

Model

R

D1

D2

A

B

H1

H2

BPW180(old)

R205

∅26

∅36

318

180

51

51

BPW180(new)

R205

∅26

∅36

318

180

49.17

54.1

BPW200(old)

R205

∅26

∅36

318

200

51

51

BPW200(new)

R205

∅26

∅36

318

200

49.17

54.1

BPW220(new)

R205

∅26

∅36

317.7

220

49.17

54.1

SAF180(old)

R205

∅19

∅31.9

323.85

180

36.5

31.75

SAF200(old)

R205

∅19

∅31.9

323.85

200

36.5

31.75

4515Q

R203

∅19.2

∅25.5

323.85

177.8

49

45

4515E

R203

∅19

∅32

323.85

177.8

39.2

32.48

4515FS

R203

∅19

∅32

323.52

177.8

49.3

50.9

4515

R203

∅19.05

∅27

323.85

177.8

48.5

50.9

4551Q

R203

∅19.2

∅25.6

323.85

220

49

45

4551E

R203

∅19

∅32

323.85

220

39.2

32.48

4551FS

R203

∅19

∅32

323.52

220

49.3

50.9

4551

R203

∅19.05

∅27

323.85

220

48.5

50.9

4707

R203

∅19

∅25.6

323.7

177.8

47.75

47.5

4709

R204.32

∅20.6

∅35

312.72

176.5

49.19

17.3

4311E

R190.8

∅21

∅35

312.8

176.5

39.78

20

4524Q

R203

∅19.2

∅25.6

323.85

127

49

45

4702

R183.5

∅19

∅25.6

296

101.5

46

39.7

1443E

R187

∅18.8

∅35

295.5

101.5

49.5

0

1308Q

R178.5

∅19

∅22

293.5

101.5

31.8

30.6

1308E

R178.5

∅19.2

∅34

299.3

101.5

30.5

3.7

4516

R203

∅19.05

∅27

323.85

203

48.5

50.9

4514

R203

∅19.05

∅27

323.85

152

48.5

50.9

11.5T YORK

R150

∅19

∅26

233

178

41

46

11.5T FUWA

R150

∅19

∅32

228

190

44

41

3502550

R145.75

∅23

∅36

204

150



Table 2. Parameters of common brake shoes


(3) Determine the products according to the brake shoe samples or drawings


4. Brake shoe maintenance instructions

In order to achieve the longest service life and best service performance of the brake shoes, regular maintenance shall be carried out in accordance with the maintenance manual of the vehicle manufacturer or axle manufacturer.


5. Brake shoe warranty description


The quality warranty of brake shoes of heavy duty vehicles is generally as follows:


① Brake shoes for semi trailers : 3 years or 500,000 km

② Brake shoes for heavy duty trucks: 2 years or 500,000 km.


Quality warranty is generally limited to use on expressways or ordinary roads. It does not include normal wear and tear, improper use, improper installation, traffic accident, improper maintenance or any other situation that may be regarded as causing product failure. The specific situation shall be subject to the manufacturer's instructions.

Note: Brake linings are vulnerable parts and are not covered by the warranty


6. WONDEE brake shoes selection table


The WONDEE brake shoe selection table is shown in Table 3 below:

Model

Specification

Picture

4514

Interchange with: 
  ROCKWELL/MERITOR A3222C1381
  Drum size: ∅419x152mm
  Rivet hole size: 6.7mm

IMG_25601-4514

4515(FUWA 13T)

Brake shoe
  Drum size: ∅419x177.8mm
  Rivet hole size: 6.7mm

IMG_25702-4515

4516

Brake shoe
  OEM NO.: 15206227
  Drum size: ∅419x203mm
  Rivet hole size: 6.7mm

IMG_25803-4516

4551(FUWA 16T)

Brake shoe
  Drum size: ∅419x220mm
  Rivet hole size: 6.7mm

04-4551IMG_259

4524Q

Brake shoe
  ROCKWELL/MERITOR A3222E1383
  SPICER OE M16WS188X
  Drum size: ∅419x127mm
  Rivet hole size: 6.7mm

IMG_26005-4524Q

4515Q

Brake shoe
  Drum size: ∅419x177.8mm
  Rivet hole size: 6.7mm

IMG_26106-4515Q

4516Q

Brake shoe
  OEM NO.: 15206227
  Drum size: ∅419x203mm
  Rivet hole size: 6.7mm

IMG_26207-4516Q

4551Q

Brake shoe
  OEM NO.: 15205191
  Drum size: ∅419x220mm
  Rivet hole size:6.7mm

IMG_26308-4551Q

4515E

Brake shoe
  Drum size: ∅419x177.8mm
  Rivet hole size: 6.7mm

IMG_26409-4515E

4515FS

Brake shoe
  OEM NO.: A-JA 0508-001
  Drum size: ∅419x177.8mm
  Rivet hole size: 6.7mm

IMG_26510-4515FS

BPW200 (old   model)

Brake shoe(old model)
  OEM NO.: 05.091.27.54.2
  Drum size: ∅420x200mm
  Rivet hole size: 8.5mm

IMG_26611-BPW200(old model)

1308E

Interchange with: EATON 1005840
  ROCKWELL/MERITOR A3222Q1837
  Drum size: ∅381x101.5mm
  Rivet hole size: 6.6mm

IMG_26712-1308E

1308Q

Interchange with:   ROCKWELL/MERITOR A3222F1982
  Drum size: ∅381x101.5mm
  Rivet hole size: 6.6mm

IMG_26813-1308Q

1308P

Brake shoe
  Drum size: ∅381x101.5mm
  Rivet hole size: 6.6mm

IMG_26914-1308P

1443

Interchange with: EATON 807685
  Drum size: ∅381x101.5mm
  Rivet hole size: 6.6mm

IMG_27015-1443

4551E

Brake shoe
  OEM NO.: 15200007
  Drum size: ∅419x220mm
  Rivet hole size: 6.7mm

IMG_27116-4551E

BPW180 (new   model)

Brake shoe(new model)
  OEM NO.: 05.091.46.17.0
  Drum size: ∅420x180mm
  Rivet hole size: 8.5mm

IMG_27217-BPW180(new model)X

BPW200 (new   model)

Brake shoe(new model)
  OEM NO.: 05.091.27.83.0
  Drum size: ∅420x200mm
  Rivet hole size: 8.5mm

IMG_27318-BPW200(new model)

BPW220 (new model)

Brake shoe(new model)
  OEM NO.:05.091.28.29.0
  Drum size: ∅420x220mm
  Rivet hole size: 8.5mm

IMG_27419-BPW220(new model)

BPW180 (old   model)

Brake shoe(old model)
  OEM NO.: 05.091.26.64.2
  Drum size: ∅420x180mm
  Rivet hole size: 8.5mm

IMG_27520-BPW180(old model)

4702

Brake shoe
  ROCKWELL/MERITOR A3222M2223
  SPICER OE 150WU134X
  Drum size: ∅381x101.5mm
  Rivet hole size: 6.6mm

IMG_27621-4702

4707

Brake shoe
  OEM NO.: 15224724
  Interchange with:   ROCKWELL/MERITOR A3222D2006
  SPICER OE M16WS193X
  Drum size: ∅419x177.8mm
  Rivet hole size: 6.7mm

IMG_27722-4707

4709

River size: 10-8 1/2
  Interchange with: EATON 819707
  Drum size: ∅419x176.5mm
  Rivet hole size: 6.7mm

IMG_27823-4709

4311E

Interchange with:
  EATON 805442 EATON 805460
  Drum size: ∅419x176.5mm
  Rivet hole size: 6.6mm

IMG_27924-4311E

SAF180 (old   model)

Brake shoe 8-9ton axles
  OEM NO.: 3.054.0053.00
  Drum size: ∅420x180mm
  Rivet hole size: 8.3mm

IMG_28025-SAF180(old model)


Drum size: ∅410x180mm
  Rivet hole size: 10.6mm

IMG_28126-410x180mm

150 YORK

Brake shoe
  Drum size: ∅419x152mm
  Rivet hole size: 6.7mm

IMG_28227-150 YORK

SAF200 (old   model)

Brake shoe 10-12 ton axles
  OEM NO.: 3.054.0053.00
  Drum size: ∅420x200mm
  Rivet hole size: 8.3mm

IMG_28328-SAF200(old model)

11.5T YORK

Brake shoe
  Drum size: ∅310x178mm
  Rivet hole size: 6.7mm

IMG_28429-11-YORK

11.5T Fuwa

Drum size: ∅310x190mm
  Rivet hole size: 6.7mm

IMG_28530-FUWA

3502550

Brake shoe
  Drum size: ∅300x150mm
  Rivet hole size: 8.5mm

IMG_28631-3502550

3502560

Brake shoe
  Drum size: ∅300x150mm
  Rivet hole size: 8.5mm

IMG_28732-3502560

QT457D-4

Brake shoe
  Drum size: ∅400x200mm
  Rivet hole size: 8.5mm

IMG_28833-QT457D-4

Table 3. WONDEE brake shoes selection table

Compiled by  WONDEE Autoparts

2021-12-14

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