US20150144437A1 - Brake assembly for railway truck - Google Patents
Brake assembly for railway truck Download PDFInfo
- Publication number
- US20150144437A1 US20150144437A1 US14/088,081 US201314088081A US2015144437A1 US 20150144437 A1 US20150144437 A1 US 20150144437A1 US 201314088081 A US201314088081 A US 201314088081A US 2015144437 A1 US2015144437 A1 US 2015144437A1
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- US
- United States
- Prior art keywords
- lever
- assembly
- live
- brake
- hanger
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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Classifications
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- 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
- B61H1/003—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 with an actuator directly acting on a brake head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H15/00—Wear-compensating mechanisms, e.g. slack adjusters
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- 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
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- 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
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49947—Assembling or joining by applying separate fastener
- Y10T29/49948—Multipart cooperating fastener [e.g., bolt and nut]
- Y10T29/4995—Nonthreaded
Definitions
- Present disclosure relates to a brake assembly and more particularly to a brake assembly for a railway truck.
- a railway truck includes a pair of brake assemblies disposed on either side of the railway truck.
- Each of the brake assembly includes a pair of hanger levers, a live lever disposed between the hanger levers, a dead lever, and a slack adjuster disposed between the live lever and the dead lever.
- the brake assembly further includes a bracket configured to couple the pair of hanger levers to the railway truck.
- the bracket includes two recessed openings, and four aligned holes, to support the pair of hanger levers via a pair of pins. Attributed to a complex design the assembly of the bracket in the brake assembly is a cumbersome and labor intensive task. Further, manufacturing cost for the bracket is also relatively higher.
- the slack adjuster includes a connecting terminal, which may be coupled to one of the hanger levers via a trigger rod.
- a connecting terminal which may be coupled to one of the hanger levers via a trigger rod.
- U.S. Pat. No. 4,635,762 discloses a rail vehicle slack adjuster in a brake unit has an axially movable piston rod, a non-rotatable, brake force delivering spindle, an adjuster nut in non-self-locking engagement with the spindle and rotating on a bearing, and a barrel spring between the unit piston and the spindle, the adjuster nut being clutchable over a main clutch to the piston rod for transmitting brake force.
- a non-rotatable locking sleeve which is only axially movable a control distance under the action of a locking spring, is clutchable to the adjuster nut over a control clutch.
- the present disclosure provides a brake assembly for a railway truck.
- the railway truck includes a frame.
- the brake assembly includes a live lever assembly including a pair of spaced apart live levers.
- the brake assembly includes a dead lever assembly.
- the brake assembly includes a slack adjuster disposed between the live lever assembly and the dead lever assembly.
- the brake assembly includes a hanger lever disposed between the pair of live levers.
- the hanger lever is pivotally coupled to the live levers.
- the brake assembly further includes a connecting terminal disposed on the slack adjuster, wherein the connecting terminal is coupled to the hanger lever via a trigger rod.
- the brake assembly further includes a first brake head and shoe attached to the hanger lever and a second brake head and shoe attached to the dead lever assembly.
- the present disclosure provides a brake assembly for a railway truck.
- the railway truck includes a frame.
- the brake assembly includes a live lever assembly including a pair of spaced apart live levers.
- the brake assembly includes a bracket rigidly coupled to the frame.
- the brake assembly includes a slack adjuster disposed between the live lever assembly and the bracket.
- the brake assembly includes a hanger lever disposed between the pair of live levers.
- the hanger lever is pivotally coupled to the live levers.
- the brake assembly further includes a connecting terminal disposed on the slack adjuster, wherein the connecting terminal is coupled to the hanger lever via a trigger rod.
- the brake assembly further includes a brake head and shoe attached to the hanger lever.
- FIG. 1 illustrates a perspective view of an exemplary railway truck
- FIG. 2 illustrates a perspective view of a first brake assembly
- FIG. 3 illustrates a detailed view of a slack adjuster associated with the first brake assembly
- FIG. 4 illustrates a perspective view of a frame of the railway truck
- FIG. 5 illustrates a side view of the exemplary railway truck including a third axle
- FIG. 6 illustrates a front perspective view of the first brake assembly.
- FIG. 1 illustrates a perspective view of an exemplary railway truck 100 .
- the railway truck 100 includes a frame 102 .
- the frame 102 rotatably supports a first axle 104 and a second axle 106 .
- the first axle 104 and the second axle 106 may include respective first ends 108 and second ends 110 .
- a first wheel 112 and a second wheel 114 are rotatably coupled to the first end 108 and the second end 110 of the first axle 104 , respectively.
- a third wheel 116 and a fourth wheel 118 are rotatably coupled to the first end 108 and the second end 110 of the second axle 106 , respectively.
- the railway truck 100 may include a brake system 120 .
- the brake system 120 includes a first brake assembly 122 and a second brake assembly 124 .
- the first brake assembly 122 is disposed between the first ends 108 of the first axle 104 and the second axle 106 such that the first brake assembly 122 may be configured to engage with the first wheel 112 and the third wheel 116 .
- the second brake assembly 124 is disposed between the second ends 110 of the first axle 104 and the second axle 106 such that the second brake assembly 124 may be configured to engage with the second wheel 114 and the fourth wheel 118 .
- FIG. 2 illustrates a perspective view of the first brake assembly 122 , according to an embodiment of the present disclosure.
- the first brake assembly 122 includes a dead lever assembly 126 and a live lever assembly 128 .
- the dead lever assembly 126 and the live lever assembly 128 include respective proximal ends 130 and distal ends 132 .
- the dead lever assembly 126 may include a first dead lever 134 spaced apart from a second dead lever 136 .
- a first bracket 138 may be disposed between the dead levers 134 , 136 at the proximal end 130 of the dead lever assembly 126 .
- the first bracket 138 is configured to pivotally couple the dead lever assembly 126 to the frame 102 of the railway truck 100 .
- the dead lever assembly 126 may further include a first brake head 140 pivotally coupled between the first dead lever 134 and the second dead lever 136 .
- the first brake head 140 may be disposed substantially equidistant from the proximal end 130 and the distal end 132 of the dead lever assembly 126 .
- a first brake shoe 142 is operatively coupled to the first brake head 140 through a key and slot arrangement (not shown).
- the live lever assembly 128 includes a first live lever 144 spaced apart from a second live lever 146 .
- the first live lever 144 includes a first receptacle 148
- the second live lever 146 includes a second receptacle 150 disposed at the proximal end 130 of the live lever assembly 128 .
- the first live lever 144 is rigidly coupled to the second live lever 146 via a fastener 152 configured to be received in the first receptacle 148 and the second receptacle 150 .
- the first brake assembly 122 includes a second bracket 154 rigidly coupled to the frame 102 .
- the second bracket 154 is received between the first live lever 144 and the second live lever 146 .
- the second bracket 154 includes an opening 156 and a pair of holes 158 .
- the first brake assembly 122 further includes a hanger lever 160 disposed between the first live lever 144 and the second live lever 146 .
- the hanger lever 160 may include an upper end 162 and a lower end 164 .
- the upper end 162 of the hanger lever 160 is received in the opening 156 of the second bracket 154 .
- the hanger lever 160 may include a through hole (not shown) to receive a locking bolt 166 therein.
- a pin 167 may be retained by the locking bolt 166 in the pair of holes 158 to support the hanger lever 160 in the second bracket 154 .
- the hanger lever 160 is pivoted to the live lever assembly 128 at a first pivot joint 168 . As illustrated in FIG.
- the first pivot joint 168 may lie substantially equidistant from the proximal end 130 and the distal end 132 of the live lever assembly 128 .
- the live lever assembly 128 may further include a second brake head 170 pivotally coupled to the hanger lever 160 at the first pivot joint 168 .
- a second brake shoe 172 is operatively coupled to the second brake head 170 through a key slot arrangement (not shown).
- the first brake assembly 122 further includes a slack adjuster 174 .
- the slack adjuster 174 is pivotally coupled between the distal ends 132 of the live lever assembly 128 and the dead lever assembly 126 .
- FIG. 3 illustrates a detailed view of the slack adjuster 174 associated with the first brake assembly 122 .
- the slack adjuster 174 includes a front end 176 and a rear end 178 . As illustrated in FIG. 3 , the front end 176 defines a front clevis 180 and the rear end 178 defines a rear clevis 182 . In an embodiment, the front clevis 180 may be received between the dead levers 134 , and 136 .
- the front clevis 180 may be pivotally coupled to the dead lever assembly 126 via a bolt retained by a first “U” clip 184 .
- the rear clevis 182 of the slack adjuster 174 may be received between the live levers 144 , and 146 , and pivotally coupled thereto via a bolt retained by a second “U” clip 186 .
- front clevis 180 and the rear clevis 182 are coupled to the dead lever assembly 126 and the live lever assembly 128 via the first “U” clip 184 and the second “U” clip 186 , respectively, one may contemplate various other commonly known fasteners like a split pin, a bolt, or a threaded fastener to pivotally couple the front clevis 180 and the rear clevis 182 to the dead lever assembly 126 and the live lever assembly 128 , respectively.
- the slack adjuster 174 includes a connecting terminal 188 .
- the lower end 164 of the hanger lever 160 is coupled to the connecting terminal 188 via a trigger rod 190 .
- FIG. 3 illustrates a first plane A-B-B′-A′ disposed longitudinally along the slack adjuster 174 and a second plane C-D-D′-C′ disposed transversely along the slack adjuster 174 .
- the front clevis 180 and the rear clevis 182 are disposed on the second plane C-D-D′-C′ of the slack adjuster 174 .
- the connecting terminal 188 is disposed on the first plane A-B-B′-A′ of the slack adjuster 174 .
- the slack adjuster 174 may be an automatic, rapid-acting slack adjuster.
- the slack adjuster 174 may be any other type of automatic or manual slack adjuster as commonly known in the art.
- FIG. 4 illustrates a perspective view of the frame 102 of the railway truck 100 including the first brake assembly 122 and the second brake assembly 124 .
- the first brake assembly 122 includes a first actuation system 192 and the second brake assembly 124 includes a second actuation system 194 .
- the first actuation system 192 is substantially similar to the second actuation system 194 . Therefore only the first actuation system 192 is explained in the present disclosure.
- the first actuation system 192 includes a push rod 196 , a crossover lever 198 and a pneumatic cylinder 200 .
- the push rod 196 may include an eye 202 on one end and a clevis 204 on other end.
- the eye 202 is configured to be aligned to the receptacles 148 , 150 of the live lever assembly 128 and receive the fastener 152 to pivotally couple the push rod 196 to the live lever assembly 128 .
- the other end of the push rod 196 is pivotally attached to the crossover lever 198 at the clevis 204 .
- the pneumatic cylinder 200 is rigidly coupled to the frame 102 of the railway truck 100 .
- the pneumatic cylinder 200 may include a cylinder 206 and a piston 208 reciprocable within the cylinder 206 .
- the pneumatic cylinder 200 may further include a spring (not shown) operatively coupled to the piston 208 as commonly known in the art.
- the crossover lever 198 is pivotally attached to the piston 208 .
- the crossover lever 198 is also pivoted to the frame 102 via a second pivot joint 210 .
- the described arrangement of the actuation systems 192 , 194 , with the push rod 196 disposed between the crossover lever 198 and the live liver assembly 128 allows the pneumatic cylinder 200 to be positioned in an outward direction with respect to the frame 102 of the railway truck 100 .
- the pneumatic cylinder 200 is easily accessible for maintenance and servicing purposes.
- first and the second actuation system 192 and 194 may include a pair of interlocking devises disposed on the ends of the crossover lever 198 to directly actuate the live livers 144 , 146 in the live lever assembly 128 , without the use of the push rod 196 .
- the brake system 120 is explained in relation to a railway truck 100 including the first axle 104 and the second axle 106 (illustrated in FIG. 1 ).
- the railway truck 100 may include a third axle 212 along with the first axle 104 and the second axle 106 .
- FIG. 5 illustrates a side view of the exemplary railway truck 100 .
- the frame 102 rotatably supporting the first axle 104 , the second axle 106 and the third axle 212 .
- the first axle 104 , the second axle 106 and the third axle 212 may include the respective first ends 108 and second ends 110 to rotatably support the first wheel 112 , the third wheel 116 , and a fifth wheel 214 at the first ends 108 of the first axle 104 , the second axle 106 and the third axle 212 respectively.
- the second wheel 114 , the fourth wheel 118 , and a sixth wheel disposed at the second ends 110 of the first axle 104 , the second axle 106 and the third axle 212 respectively are not illustrated in FIG. 5 .
- the brake system 120 for the railway truck 100 including the third axle 212 may include the first brake assembly 122 , and the second brake assembly 124 configured to engage the wheels 112 , 114 , 116 , and 118 associated with the first axle 104 and the second axle 106 .
- the brake system 120 further includes a third brake assembly 216 and a fourth brake assembly (not shown) configured to engage the fifth wheel 214 and the sixth wheel.
- the third brake assembly 216 is disposed between the first ends 108 of the second axle 106 and the third axle 212 such that the third brake assembly 216 may be configured to engage with the fifth wheel 214 .
- the third brake assembly 216 may include a live lever assembly, a hanger lever and a slack adjuster substantially similar to the live lever assembly 128 , the hanger lever 160 , and the slack adjuster 174 of the first brake assembly 122 .
- the third brake assembly 216 further includes a third bracket 218 rigidly coupled to the frame 102 .
- the slack adjuster 174 is disposed between the live lever assembly 128 and the third bracket 218 .
- a third brake shoe 220 is operatively coupled to the hanger lever 160 via a third brake head 222 through a key and slot arrangement as commonly known in the art.
- the brake system 120 is implemented in the railway truck 100
- a person having ordinary skill in the art may acknowledge that the railway truck 100 disclosed herein is exemplary in nature and hence, non-limiting of this disclosure.
- Any machine configured to travel on rail roads and including one or more rotatable members which are embodied as the wheels 112 , 114 , 116 , 118 , and 214 , in the present disclosure may employ the brake system 120 disclosed herein.
- Conventional brake assemblies include a bracket configured to couple a pair of hanger levers and a live lever to the railway truck.
- the bracket includes a plurality of openings, holes, and locking pins to support the pair of hanger levers and the live lever.
- the first brake assembly 122 of the brake system 120 includes one hanger lever 160 disposed between the pair of live levers 144 , and 146 .
- the live levers 144 , 146 are rigidly coupled through the fastener 152 .
- the second bracket 154 includes the opening 156 , the pair of holes 158 , the locking bolt 166 and the pin 167 for supporting the hanger lever 160 . Therefore, the second bracket 154 of the present disclosure is easy to manufacture, cost effective and convenient to assemble in the brake assemblies 122 , 124 , and 216 .
- the connecting terminal 188 on the slack adjuster 174 is disposed along the first plane A-B-A′-B′.
- the slack adjuster 174 may be used for both the brake assemblies 122 , 124 . Therefore, the second brake assembly 124 is substantially similar to the first brake assembly 122 .
- the fourth brake assembly is substantially similar to the third brake assembly 216 .
- manufacturing cost for the brake systems 120 , and 216 is reduced. Since the brake assemblies 122 , 124 may be interchangeably disposed on the railway truck 100 , inventory management of the brake systems 120 , 124 and 216 for the railway truck 100 is concise and easy to maintain.
- the pneumatic cylinder 200 is fluidly coupled to an air reservoir (not shown).
- the air reservoir is configured to selectively pressurize and de-pressurize the pneumatic cylinder 200 .
- the piston 208 is extended outwards such that the brake shoes 142 , 172 are displaced towards the respective wheels 112 , 114 , 116 , and 118 .
- the spring (not shown) is configured to retract the piston 208 inwards such that the brake shoes 142 , 172 are displaced away from the respective wheels 112 , 114 , 116 , and 118 .
- FIG. 6 illustrates a front perspective view of the first brake assembly 122 .
- the piston 208 is in extended position.
- the crossover lever 198 actuates the push rod 196 to push the proximal end 130 of the live lever assembly 128 towards the associated wheel 112 .
- the hanger lever 160 is configured to trigger the slack adjuster 174 such that the distal end 132 of the live lever assembly 128 and the dead lever assembly 126 are moved towards the respective wheels 112 , and 116 .
- the first brake assembly 122 further includes a stabilizer bar 224 slidingly coupled between the live lever assembly 128 and the dead lever assembly 126 .
- the stabilizer bar 224 is configured to allow a motion of the live lever assembly 128 and the dead lever 126 along a third plane E-F-F′-E′. Therefore, the first brake shoe 142 and the second brake shoe 172 may engage the third wheel 116 and the first wheel 112 respectively. It will be apparent to one skilled in the art that after a few cycles of operation, the brake shoes 142 , and 172 may partially wear.
- the slack adjuster 174 is configured to maintain a clearance between the wheels 112 , 116 and the brake shoes 142 , 172 by adjusting a distance D between the distal end 132 of the live lever assembly 128 and the dead lever assembly 126 . Hence, an extent of braking remains substantially similar even after partial wear of the brake shoes 142 , and 172 .
- an operation of the first brake assembly 122 with respect to the first wheel 112 and the third wheel 116 is disclosed. It is to be noted that an operation of the second brake assembly 124 with respect to the second wheel 114 and the fourth wheel 118 is substantially similar to the operation of the first brake assembly 122 with respect to the first wheel 112 and the third wheel 116 . Further, it will be acknowledged by a person ordinarily skilled in the art that the operating principle of the third brake assembly 216 and the fourth brake assembly is similar to that of the first and the second brake assemblies 122 , and 124 as discussed in the foregoing disclosure.
- a method of disposing the slack adjuster 174 in the first brake assembly 122 includes arranging the first dead lever 134 spaced apart from the second dead lever 136 .
- the method includes arranging the first live lever 144 spaced apart from the second live lever 146 .
- the method includes disposing the slack adjuster 174 between the dead levers 134 , 136 and the live levers 144 , 146 .
- the method includes pivotally coupling the hanger lever 160 between the first live lever 144 and the second live lever 146 .
- the method includes attaching the trigger rod 190 to the hanger lever 160 .
- the method further includes coupling the connecting terminal 188 on the slack adjuster 174 to the trigger rod 190 .
- the method further includes disposing the second bracket 154 between the live levers 144 , 146 .
- the method further includes disposing the hanger lever 160 in the opening 156 of the second bracket 154 .
- the method further includes attaching the hanger lever 160 to the second bracket 154 via the pin 167 and the locking bolt 166 .
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Abstract
The present disclosure provides a brake assembly for a railway truck. The railway truck includes a frame. The brake assembly includes a live lever assembly including a pair of spaced apart live levers. The brake assembly includes a dead lever assembly. The brake assembly includes a slack adjuster disposed between the live lever assembly and the dead lever assembly. The brake assembly includes a hanger lever disposed between the pair of live levers. The hanger lever is pivotally coupled to the live levers. The brake assembly further includes a connecting terminal disposed on the slack adjuster, wherein the connecting terminal is coupled to the hanger lever via a trigger rod. The brake assembly further includes a first brake shoe attached to the hanger lever and a second brake shoe attached to the dead lever assembly.
Description
- Present disclosure relates to a brake assembly and more particularly to a brake assembly for a railway truck.
- A railway truck includes a pair of brake assemblies disposed on either side of the railway truck. Each of the brake assembly includes a pair of hanger levers, a live lever disposed between the hanger levers, a dead lever, and a slack adjuster disposed between the live lever and the dead lever. The brake assembly further includes a bracket configured to couple the pair of hanger levers to the railway truck. The bracket includes two recessed openings, and four aligned holes, to support the pair of hanger levers via a pair of pins. Attributed to a complex design the assembly of the bracket in the brake assembly is a cumbersome and labor intensive task. Further, manufacturing cost for the bracket is also relatively higher. Moreover, the slack adjuster includes a connecting terminal, which may be coupled to one of the hanger levers via a trigger rod. Conventionally, for the pair of the brake assemblies disposed on either sides of the railway truck the two different designs of the slack adjusters are required.
- U.S. Pat. No. 4,635,762 discloses a rail vehicle slack adjuster in a brake unit has an axially movable piston rod, a non-rotatable, brake force delivering spindle, an adjuster nut in non-self-locking engagement with the spindle and rotating on a bearing, and a barrel spring between the unit piston and the spindle, the adjuster nut being clutchable over a main clutch to the piston rod for transmitting brake force. A non-rotatable locking sleeve, which is only axially movable a control distance under the action of a locking spring, is clutchable to the adjuster nut over a control clutch.
- In one aspect, the present disclosure provides a brake assembly for a railway truck. The railway truck includes a frame. The brake assembly includes a live lever assembly including a pair of spaced apart live levers. The brake assembly includes a dead lever assembly. The brake assembly includes a slack adjuster disposed between the live lever assembly and the dead lever assembly. The brake assembly includes a hanger lever disposed between the pair of live levers. The hanger lever is pivotally coupled to the live levers. The brake assembly further includes a connecting terminal disposed on the slack adjuster, wherein the connecting terminal is coupled to the hanger lever via a trigger rod. The brake assembly further includes a first brake head and shoe attached to the hanger lever and a second brake head and shoe attached to the dead lever assembly.
- In another aspect, the present disclosure provides a brake assembly for a railway truck. The railway truck includes a frame. The brake assembly includes a live lever assembly including a pair of spaced apart live levers. The brake assembly includes a bracket rigidly coupled to the frame. The brake assembly includes a slack adjuster disposed between the live lever assembly and the bracket. The brake assembly includes a hanger lever disposed between the pair of live levers. The hanger lever is pivotally coupled to the live levers. The brake assembly further includes a connecting terminal disposed on the slack adjuster, wherein the connecting terminal is coupled to the hanger lever via a trigger rod. The brake assembly further includes a brake head and shoe attached to the hanger lever.
- Other features and aspects of this disclosure will be apparent from the following description and the accompanying drawings.
-
FIG. 1 illustrates a perspective view of an exemplary railway truck; -
FIG. 2 illustrates a perspective view of a first brake assembly; -
FIG. 3 illustrates a detailed view of a slack adjuster associated with the first brake assembly; -
FIG. 4 illustrates a perspective view of a frame of the railway truck; -
FIG. 5 illustrates a side view of the exemplary railway truck including a third axle; and -
FIG. 6 illustrates a front perspective view of the first brake assembly. - The present disclosure relates to a brake assembly for a railway truck.
FIG. 1 illustrates a perspective view of anexemplary railway truck 100. Therailway truck 100 includes aframe 102. Theframe 102 rotatably supports afirst axle 104 and asecond axle 106. Thefirst axle 104 and thesecond axle 106 may include respectivefirst ends 108 andsecond ends 110. Afirst wheel 112 and asecond wheel 114 are rotatably coupled to thefirst end 108 and thesecond end 110 of thefirst axle 104, respectively. Athird wheel 116 and afourth wheel 118 are rotatably coupled to thefirst end 108 and thesecond end 110 of thesecond axle 106, respectively. - In an embodiment, the
railway truck 100 may include abrake system 120. Thebrake system 120 includes afirst brake assembly 122 and asecond brake assembly 124. Thefirst brake assembly 122 is disposed between thefirst ends 108 of thefirst axle 104 and thesecond axle 106 such that thefirst brake assembly 122 may be configured to engage with thefirst wheel 112 and thethird wheel 116. Thesecond brake assembly 124 is disposed between thesecond ends 110 of thefirst axle 104 and thesecond axle 106 such that thesecond brake assembly 124 may be configured to engage with thesecond wheel 114 and thefourth wheel 118. -
FIG. 2 illustrates a perspective view of thefirst brake assembly 122, according to an embodiment of the present disclosure. Thefirst brake assembly 122 includes adead lever assembly 126 and alive lever assembly 128. Thedead lever assembly 126 and thelive lever assembly 128 include respectiveproximal ends 130 anddistal ends 132. Thedead lever assembly 126 may include a firstdead lever 134 spaced apart from a seconddead lever 136. Afirst bracket 138 may be disposed between thedead levers proximal end 130 of thedead lever assembly 126. Thefirst bracket 138 is configured to pivotally couple thedead lever assembly 126 to theframe 102 of therailway truck 100. Thedead lever assembly 126 may further include afirst brake head 140 pivotally coupled between the firstdead lever 134 and the seconddead lever 136. Thefirst brake head 140 may be disposed substantially equidistant from theproximal end 130 and thedistal end 132 of thedead lever assembly 126. Afirst brake shoe 142 is operatively coupled to thefirst brake head 140 through a key and slot arrangement (not shown). - In an embodiment of the present disclosure, the
live lever assembly 128 includes a firstlive lever 144 spaced apart from a secondlive lever 146. The firstlive lever 144 includes afirst receptacle 148, and the secondlive lever 146 includes asecond receptacle 150 disposed at theproximal end 130 of thelive lever assembly 128. In an embodiment, the firstlive lever 144 is rigidly coupled to the secondlive lever 146 via afastener 152 configured to be received in thefirst receptacle 148 and thesecond receptacle 150. In an embodiment, thefirst brake assembly 122 includes asecond bracket 154 rigidly coupled to theframe 102. Thesecond bracket 154 is received between the firstlive lever 144 and the secondlive lever 146. Further, thesecond bracket 154 includes anopening 156 and a pair ofholes 158. - In an embodiment, the
first brake assembly 122 further includes ahanger lever 160 disposed between the firstlive lever 144 and the secondlive lever 146. Thehanger lever 160 may include anupper end 162 and alower end 164. Theupper end 162 of thehanger lever 160 is received in theopening 156 of thesecond bracket 154. Thehanger lever 160 may include a through hole (not shown) to receive alocking bolt 166 therein. Apin 167 may be retained by the lockingbolt 166 in the pair ofholes 158 to support thehanger lever 160 in thesecond bracket 154. In an embodiment, thehanger lever 160 is pivoted to the live lever assembly 128 at afirst pivot joint 168. As illustrated inFIG. 2 , the first pivot joint 168 may lie substantially equidistant from theproximal end 130 and thedistal end 132 of thelive lever assembly 128. Thelive lever assembly 128 may further include asecond brake head 170 pivotally coupled to thehanger lever 160 at thefirst pivot joint 168. Asecond brake shoe 172 is operatively coupled to thesecond brake head 170 through a key slot arrangement (not shown). - The
first brake assembly 122 further includes aslack adjuster 174. Theslack adjuster 174 is pivotally coupled between the distal ends 132 of thelive lever assembly 128 and thedead lever assembly 126.FIG. 3 illustrates a detailed view of theslack adjuster 174 associated with thefirst brake assembly 122. Theslack adjuster 174 includes afront end 176 and arear end 178. As illustrated inFIG. 3 , thefront end 176 defines afront clevis 180 and therear end 178 defines arear clevis 182. In an embodiment, thefront clevis 180 may be received between thedead levers front clevis 180 may be pivotally coupled to thedead lever assembly 126 via a bolt retained by a first “U”clip 184. Therear clevis 182 of theslack adjuster 174 may be received between thelive levers clip 186. Although it is disclosed herein that thefront clevis 180 and therear clevis 182 are coupled to thedead lever assembly 126 and thelive lever assembly 128 via the first “U”clip 184 and the second “U”clip 186, respectively, one may contemplate various other commonly known fasteners like a split pin, a bolt, or a threaded fastener to pivotally couple thefront clevis 180 and therear clevis 182 to thedead lever assembly 126 and thelive lever assembly 128, respectively. - In an embodiment the
slack adjuster 174 includes a connectingterminal 188. Thelower end 164 of thehanger lever 160 is coupled to the connectingterminal 188 via atrigger rod 190. For the purpose of understanding the location of the connectingterminal 188,FIG. 3 illustrates a first plane A-B-B′-A′ disposed longitudinally along theslack adjuster 174 and a second plane C-D-D′-C′ disposed transversely along theslack adjuster 174. As illustrated inFIG. 3 , thefront clevis 180 and therear clevis 182 are disposed on the second plane C-D-D′-C′ of theslack adjuster 174. However, the connectingterminal 188 is disposed on the first plane A-B-B′-A′ of theslack adjuster 174. In an embodiment, theslack adjuster 174 may be an automatic, rapid-acting slack adjuster. However, in alternative embodiments theslack adjuster 174 may be any other type of automatic or manual slack adjuster as commonly known in the art. -
FIG. 4 illustrates a perspective view of theframe 102 of therailway truck 100 including thefirst brake assembly 122 and thesecond brake assembly 124. In an embodiment of the present disclosure, thefirst brake assembly 122 includes afirst actuation system 192 and thesecond brake assembly 124 includes asecond actuation system 194. In an embodiment, thefirst actuation system 192 is substantially similar to thesecond actuation system 194. Therefore only thefirst actuation system 192 is explained in the present disclosure. Thefirst actuation system 192 includes apush rod 196, acrossover lever 198 and apneumatic cylinder 200. In an embodiment thepush rod 196 may include aneye 202 on one end and aclevis 204 on other end. Theeye 202 is configured to be aligned to thereceptacles live lever assembly 128 and receive thefastener 152 to pivotally couple thepush rod 196 to thelive lever assembly 128. The other end of thepush rod 196 is pivotally attached to thecrossover lever 198 at theclevis 204. In an embodiment, thepneumatic cylinder 200 is rigidly coupled to theframe 102 of therailway truck 100. Thepneumatic cylinder 200 may include acylinder 206 and apiston 208 reciprocable within thecylinder 206. Thepneumatic cylinder 200 may further include a spring (not shown) operatively coupled to thepiston 208 as commonly known in the art. Thecrossover lever 198 is pivotally attached to thepiston 208. As illustrated inFIG. 4 , thecrossover lever 198 is also pivoted to theframe 102 via asecond pivot joint 210. The described arrangement of theactuation systems push rod 196 disposed between thecrossover lever 198 and thelive liver assembly 128, allows thepneumatic cylinder 200 to be positioned in an outward direction with respect to theframe 102 of therailway truck 100. Thus, thepneumatic cylinder 200 is easily accessible for maintenance and servicing purposes. In an alternative embodiment, the first and thesecond actuation system crossover lever 198 to directly actuate thelive livers live lever assembly 128, without the use of thepush rod 196. - In the above embodiments, the
brake system 120 is explained in relation to arailway truck 100 including thefirst axle 104 and the second axle 106 (illustrated inFIG. 1 ). However in an alternative embodiment therailway truck 100 may include athird axle 212 along with thefirst axle 104 and thesecond axle 106.FIG. 5 illustrates a side view of theexemplary railway truck 100. Theframe 102 rotatably supporting thefirst axle 104, thesecond axle 106 and thethird axle 212. Thefirst axle 104, thesecond axle 106 and thethird axle 212 may include the respective first ends 108 and second ends 110 to rotatably support thefirst wheel 112, thethird wheel 116, and afifth wheel 214 at the first ends 108 of thefirst axle 104, thesecond axle 106 and thethird axle 212 respectively. For ease of explanation, thesecond wheel 114, thefourth wheel 118, and a sixth wheel disposed at the second ends 110 of thefirst axle 104, thesecond axle 106 and thethird axle 212 respectively are not illustrated inFIG. 5 . - In an embodiment, the
brake system 120 for therailway truck 100 including thethird axle 212 may include thefirst brake assembly 122, and thesecond brake assembly 124 configured to engage thewheels first axle 104 and thesecond axle 106. Thebrake system 120 further includes athird brake assembly 216 and a fourth brake assembly (not shown) configured to engage thefifth wheel 214 and the sixth wheel. As shown inFIG. 5 , thethird brake assembly 216 is disposed between the first ends 108 of thesecond axle 106 and thethird axle 212 such that thethird brake assembly 216 may be configured to engage with thefifth wheel 214. Thethird brake assembly 216 may include a live lever assembly, a hanger lever and a slack adjuster substantially similar to thelive lever assembly 128, thehanger lever 160, and theslack adjuster 174 of thefirst brake assembly 122. Thethird brake assembly 216 further includes athird bracket 218 rigidly coupled to theframe 102. Theslack adjuster 174 is disposed between thelive lever assembly 128 and thethird bracket 218. Athird brake shoe 220 is operatively coupled to thehanger lever 160 via athird brake head 222 through a key and slot arrangement as commonly known in the art. - Although, it is disclosed herein that the
brake system 120 is implemented in therailway truck 100, a person having ordinary skill in the art may acknowledge that therailway truck 100 disclosed herein is exemplary in nature and hence, non-limiting of this disclosure. Any machine configured to travel on rail roads and including one or more rotatable members which are embodied as thewheels brake system 120 disclosed herein. - The industrial applicability of the
brake system 120 for therailway truck 100 described herein will be readily appreciated from the foregoing discussion. - Conventional brake assemblies include a bracket configured to couple a pair of hanger levers and a live lever to the railway truck. The bracket includes a plurality of openings, holes, and locking pins to support the pair of hanger levers and the live lever. According to an embodiment of the present disclosure, the
first brake assembly 122 of thebrake system 120 includes onehanger lever 160 disposed between the pair oflive levers live levers fastener 152. Hence, thesecond bracket 154 includes theopening 156, the pair ofholes 158, the lockingbolt 166 and thepin 167 for supporting thehanger lever 160. Therefore, thesecond bracket 154 of the present disclosure is easy to manufacture, cost effective and convenient to assemble in thebrake assemblies - According to another embodiment of the present disclosure, the connecting
terminal 188 on theslack adjuster 174 is disposed along the first plane A-B-A′-B′. Hence, theslack adjuster 174 may be used for both thebrake assemblies second brake assembly 124 is substantially similar to thefirst brake assembly 122. However, in the alternative embodiment where therailway truck 100 includes thethird axle 212, with use of theslack adjuster 174 of the present disclosure the fourth brake assembly is substantially similar to thethird brake assembly 216. Thus with theslack adjuster 174 of the present disclosure, manufacturing cost for thebrake systems brake assemblies railway truck 100, inventory management of thebrake systems railway truck 100 is concise and easy to maintain. - In an embodiment of the present disclosure, the
pneumatic cylinder 200 is fluidly coupled to an air reservoir (not shown). The air reservoir is configured to selectively pressurize and de-pressurize thepneumatic cylinder 200. Upon pressurization of thepneumatic cylinder 200 thepiston 208 is extended outwards such that thebrake shoes respective wheels pneumatic cylinder 200, the spring (not shown) is configured to retract thepiston 208 inwards such that thebrake shoes respective wheels -
FIG. 6 illustrates a front perspective view of thefirst brake assembly 122. In an exemplary embodiment, during braking thepiston 208 is in extended position. Thecrossover lever 198 actuates thepush rod 196 to push theproximal end 130 of thelive lever assembly 128 towards the associatedwheel 112. Subsequently, thehanger lever 160 is configured to trigger theslack adjuster 174 such that thedistal end 132 of thelive lever assembly 128 and thedead lever assembly 126 are moved towards therespective wheels first brake assembly 122 further includes astabilizer bar 224 slidingly coupled between thelive lever assembly 128 and thedead lever assembly 126. Thestabilizer bar 224 is configured to allow a motion of thelive lever assembly 128 and thedead lever 126 along a third plane E-F-F′-E′. Therefore, thefirst brake shoe 142 and thesecond brake shoe 172 may engage thethird wheel 116 and thefirst wheel 112 respectively. It will be apparent to one skilled in the art that after a few cycles of operation, thebrake shoes slack adjuster 174 is configured to maintain a clearance between thewheels brake shoes distal end 132 of thelive lever assembly 128 and thedead lever assembly 126. Hence, an extent of braking remains substantially similar even after partial wear of thebrake shoes - In the preceding embodiment an operation of the
first brake assembly 122 with respect to thefirst wheel 112 and thethird wheel 116 is disclosed. It is to be noted that an operation of thesecond brake assembly 124 with respect to thesecond wheel 114 and thefourth wheel 118 is substantially similar to the operation of thefirst brake assembly 122 with respect to thefirst wheel 112 and thethird wheel 116. Further, it will be acknowledged by a person ordinarily skilled in the art that the operating principle of thethird brake assembly 216 and the fourth brake assembly is similar to that of the first and thesecond brake assemblies - According to an embodiment of the present disclosure, a method of disposing the
slack adjuster 174 in thefirst brake assembly 122 is disclosed herein. The method includes arranging the firstdead lever 134 spaced apart from the seconddead lever 136. The method includes arranging the firstlive lever 144 spaced apart from the secondlive lever 146. The method includes disposing theslack adjuster 174 between thedead levers live levers hanger lever 160 between the firstlive lever 144 and the secondlive lever 146. The method includes attaching thetrigger rod 190 to thehanger lever 160. The method further includes coupling the connectingterminal 188 on theslack adjuster 174 to thetrigger rod 190. - In an embodiment, the method further includes disposing the
second bracket 154 between thelive levers hanger lever 160 in theopening 156 of thesecond bracket 154. The method further includes attaching thehanger lever 160 to thesecond bracket 154 via thepin 167 and thelocking bolt 166. - From the foregoing it will be appreciated that, although specific embodiments have been described herein for purposes of illustration, various modifications or variations may be made without deviating from the spirit or scope of inventive features claimed herein. Other embodiments will be apparent to those skilled in the art from consideration of the specification and figures and practice of the arrangements disclosed herein. It is intended that the specification and disclosed examples be considered as exemplary only, with a true inventive scope and spirit being indicated by the following claims and their equivalents.
Claims (17)
1. A brake assembly for a railway truck, the railway truck including a frame, the brake assembly comprising:
a live lever assembly including a pair of spaced apart live levers;
a dead lever assembly;
a slack adjuster disposed between the live lever assembly and the dead lever assembly;
a hanger lever disposed between the pair of live levers, the hanger lever pivotally coupled to the live levers;
a connecting terminal disposed on the slack adjuster, wherein the connecting terminal coupled to the hanger lever via a trigger rod;
a first brake shoe attached to the hanger lever; and
a second brake shoe attached to the dead lever assembly.
2. The brake assembly of claim 1 further comprising a bracket rigidly coupled to the frame, the bracket disposed between the pair of live levers, the bracket including:
an opening; and
a pair of holes supporting the hanger lever in the opening of the bracket.
3. The brake assembly of claim 1 , wherein the first and the second brake shoe is coupled to the hanger lever and the dead lever assembly via a first brake head and a second brake head respectively.
4. The brake assembly of claim 1 , wherein the live lever assembly and the dead lever assembly include a proximal end and a distal end and wherein the slack adjuster is pivotally coupled to the distal ends of the live lever assembly and the dead lever assembly.
5. The brake assembly of claim 4 further comprising an actuation system, the actuation system comprising:
a pneumatic cylinder rigidly attached to the frame;
a crossover lever operatively connected to the pneumatic cylinder, the crossover lever pivotally coupled to the frame and the push rod; and
a push rod coupled to the proximal end of the live lever assembly and the crossover lever.
6. The brake assembly of claim 4 , wherein the dead lever assembly comprising a pair of spaced apart dead levers and wherein the proximal end of the dead lever assembly is attached to the frame.
7. The brake assembly of claim 6 , wherein the slack adjuster is coupled between the pair of live levers and the pair of dead levers.
8. A brake assembly for a railway truck, the railway truck including a frame, the brake assembly comprising:
a live lever assembly including a pair of spaced apart live levers;
a bracket rigidly coupled to the frame;
a slack adjuster disposed between the live lever assembly and the bracket;
a hanger lever disposed between the pair of live levers, the hanger lever pivotally coupled to the live levers;
a connecting terminal disposed on the slack adjuster, wherein the connecting terminal coupled to the hanger lever via a trigger rod; and
a brake shoe attached to the hanger lever.
9. The brake assembly of claim 8 engages a wheel of the railway truck.
10. The brake assembly of claim 8 further including a bracket rigidly coupled to the frame, the bracket disposed between the pair of live levers, the bracket comprising:
an opening; and
a pair of holes supporting the hanger lever in the opening of the bracket.
11. The brake assembly of claim 8 , wherein the brake shoe is coupled to the hanger lever via a brake head.
12. The brake assembly of claim 8 , wherein the live lever assembly includes a proximal end and a distal end and wherein the slack adjuster is pivotally coupled to the distal end of the live lever assembly and the bracket.
13. The brake assembly of claim 12 further comprising an actuation system, the actuation system comprising:
a pneumatic cylinder rigidly attached to the frame;
a crossover lever operatively connected to the pneumatic cylinder, the crossover lever pivotally coupled to the frame and the push rod; and
a push rod coupled to the proximal end of the live lever assembly and the crossover lever.
14. A method of providing a brake assembly in a railway truck, the method comprising:
arranging a pair of spaced apart dead levers;
arranging a pair of spaced apart live levers;
disposing the slack adjuster between the dead levers and the live levers;
pivotally coupling a hanger lever between the live levers;
attaching a trigger rod to the hanger lever; and
coupling a connecting terminal on a slack adjuster to the trigger rod.
15. The method of claim 14 further comprising disposing a bracket between the live levers.
16. The method of claim 14 further comprising disposing the hanger lever in an opening of the bracket.
17. The method of claim 16 further comprising attaching the hanger lever to the bracket via a locking bolt and a pin.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/088,081 US20150144437A1 (en) | 2013-11-22 | 2013-11-22 | Brake assembly for railway truck |
AU2014253573A AU2014253573A1 (en) | 2013-11-22 | 2014-10-27 | Brake assembly for railway truck |
RU2014147027A RU2014147027A (en) | 2013-11-22 | 2014-11-21 | BRAKE DEVICE FOR RAILWAY TROLLEY |
CN201410676616.0A CN104791400A (en) | 2013-11-22 | 2014-11-21 | Brake assembly for railway truck |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/088,081 US20150144437A1 (en) | 2013-11-22 | 2013-11-22 | Brake assembly for railway truck |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150144437A1 true US20150144437A1 (en) | 2015-05-28 |
Family
ID=53181690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/088,081 Abandoned US20150144437A1 (en) | 2013-11-22 | 2013-11-22 | Brake assembly for railway truck |
Country Status (4)
Country | Link |
---|---|
US (1) | US20150144437A1 (en) |
CN (1) | CN104791400A (en) |
AU (1) | AU2014253573A1 (en) |
RU (1) | RU2014147027A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220169227A1 (en) * | 2020-12-01 | 2022-06-02 | Zf Friedrichshafen Ag | Actuating arrangement for a parking brake of a motor vehicle and motor vehicle having the actuating arrangement |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106428093B (en) * | 2016-10-25 | 2019-02-01 | 太原重工股份有限公司 | Coke quenching cart brake apparatus and braking external member |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3679028A (en) * | 1970-12-10 | 1972-07-25 | Amsted Ind Inc | Multiple unit brake |
SE448442B (en) * | 1984-08-28 | 1987-02-23 | Sab Nife Ab | GAME SPACE REPLACEMENT APPLIANCES FOR A RAILWAY VEHICLE |
US5913387A (en) * | 1997-07-16 | 1999-06-22 | Shimano Inc. | Brake device |
US6745700B2 (en) * | 2002-06-14 | 2004-06-08 | General Motors Corporation | Radial bogie with steering beam mount unitized brake |
WO2008022098A2 (en) * | 2006-08-14 | 2008-02-21 | Wabtec Holding Corp. | Railway car hand brake lever |
CN102009665A (en) * | 2010-11-19 | 2011-04-13 | 长春轨道客车股份有限公司 | Bogie shaft-mounted disc type braking device |
CN102673607A (en) * | 2012-05-07 | 2012-09-19 | 宝鸡南车时代工程机械有限公司 | Steering frame of railway track car with flaw detection devices |
-
2013
- 2013-11-22 US US14/088,081 patent/US20150144437A1/en not_active Abandoned
-
2014
- 2014-10-27 AU AU2014253573A patent/AU2014253573A1/en not_active Abandoned
- 2014-11-21 CN CN201410676616.0A patent/CN104791400A/en active Pending
- 2014-11-21 RU RU2014147027A patent/RU2014147027A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220169227A1 (en) * | 2020-12-01 | 2022-06-02 | Zf Friedrichshafen Ag | Actuating arrangement for a parking brake of a motor vehicle and motor vehicle having the actuating arrangement |
US11738733B2 (en) * | 2020-12-01 | 2023-08-29 | Zf Friedrichshafen Ag | Actuating arrangement for a parking brake of a motor vehicle and motor vehicle having the actuating arrangement |
Also Published As
Publication number | Publication date |
---|---|
CN104791400A (en) | 2015-07-22 |
RU2014147027A (en) | 2016-06-10 |
AU2014253573A1 (en) | 2015-06-11 |
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Legal Events
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AS | Assignment |
Owner name: ELECTRO-MOTIVE DIESEL, INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GODING, DAVID J.;REEL/FRAME:031662/0286 Effective date: 20131121 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |