AU2021402336B2 - Railway wagon bogie using disc brake - Google Patents
Railway wagon bogie using disc brake Download PDFInfo
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- AU2021402336B2 AU2021402336B2 AU2021402336A AU2021402336A AU2021402336B2 AU 2021402336 B2 AU2021402336 B2 AU 2021402336B2 AU 2021402336 A AU2021402336 A AU 2021402336A AU 2021402336 A AU2021402336 A AU 2021402336A AU 2021402336 B2 AU2021402336 B2 AU 2021402336B2
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- 230000000712 assembly Effects 0.000 claims abstract description 65
- 238000000429 assembly Methods 0.000 claims abstract description 65
- 238000013016 damping Methods 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002783 friction material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
- B61F5/04—Bolster supports or mountings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
A railway wagon bogie using disc brake, comprising wheel set assemblies (1), side frame assemblies (2), bearings (6), axle box devices (9), bearing spring groups (7) mounted on spring bearing platforms of center frames of the side frame assemblies (2), wedge damping devices (3), bolster assemblies (4), a foundation brake (5), and side-bearing assemblies (8); the bolster assemblies (4) each comprise a bolster (4.1), two pipe supports (4.3) symmetrically mounted on two side surfaces of the center of the bolster (4.1), and two hanger bracket assemblies symmetrically mounted on two ends of the bolster (4.1); the foundation brake (5) comprises brake caliper units and a brake pipe system, each brake caliper unit comprises a brake cylinder (5.1), a brake lever (5.2), a hanger (5.3), a brake pad holder (5.4), and brake pads (5.5), the middle of the brake lever (5.2) is connected to two sides of the lower end of the hanger (5.3) by means of a pin shaft, the brake lever (5.2) has one end connected to the brake cylinder (5.1) and the other end connected to the brake pad holder (5.4), the brake pads (5.5) are mounted on the inner side of the brake pad holder (5.4), the hanger (5.3) of each brake caliper unit is connected to the corresponding hanger bracket (4.6) of the bolster (4.1), one pipe support (4.3) in each bolster assembly (4) is connected to a first air pipe seat (5.7) of the brake pipe system, and the other pipe support (4.3) in the bolster assembly (4) is connected to a second air pipe seat (5.10) of the brake pipe system. The usage of a brake disc eliminates abrasion of wheels caused by crushing by the brake pads when a wagon brakes, and eliminates the effect on material performance of the wheels.
Description
[0001] The embodiments of the disclosure relate to the technical field of railway wagon bogie, and in particular to a railway wagon bogie using disc brake.
[0002] Disc braking technology and tread braking technology are the most commonly used braking methods for railway vehicles. With the development of railway wagon technology at home and abroad, most high-speed wagons use the disc braking technology, and the bogie of which is of a welded frame type. Wheel shoe tread braking technology is widely used for heavy haul railway wagons, in which the bogie is of a three-piece bogie. A cast steel three-piece bogie is mainly composed of one bolster and two side frames, which is characterized by large design strength, simple and compact structure, fewer parts, convenient maintenance, low cost, good load balance, etc. The three-piece bogie uses lever brake based on brake devices, and when braking, pressure is applied to the wheel through the brake shoe, so that braking is realized through the friction between the wheel and the brake shoe, but the friction thermal load increases the wear of the wheel, so that inertia faults such as hot stripping of the wheel tread and uneven wear of the brake shoe are common. Especially in the case of heavy load, the wagon runs with large inertia, the process of stopping or decelerating within the specified distance will greatly accelerate the wheel wear, not to mention that the wagon traveling itself is a process of '0 frequent speed regulation and braking.
[0003] Disc braking is to install a brake disc on the axle, and install a brake clamp device on the bogie frame or bolster, and the brake pad installed on the brake clamp device presses the side face of the brake disc to generate a friction braking force for braking to slow down or stop. As the friction pair does not directly act on the wheel tread, the thermal load and mechanical wear of the wheel tread can be greatly reduced, thus the service life of the wheel can be extended. The brake disc has independent design and material selection, which can realize forced heat dissipation of the brake disc during operation and improve the brake friction heat capacity. The brake disc is in plane contact with the brake pad, so that the friction factor is more stable, and the axle braking power is high.
[0004] At present, the disc braking technology is mainly used for express trucks. Express trucks have high speed, less marshalling, and most of the axle loads thereof are in the range of 18 t to 22 t, and the bogies thereof are mainly of a welded frame type, and the design, manufacturing, operation and maintenance of the bogies are costly and difficult. The welded frame type bogie using the disc braking technology is not suitable for the loading and use of railway wagons with large axle load.
[0005] The main characteristics of a railway wagon using railway heavy haul transportation technology are heavy vehicle axles, high load, large number of train marshalling vehicles, low running speed, simple and reliable bogie structure, and low manufacturing cost. Due to the lack of conditions for maintenance of the wheel turning equipment, the high maintenance labor costs, the management regulations that single wear wheels shall be used, or the difficulty in organizing and implementing changes to the brake shoe, some export wagon bogies put forward higher requirements for wheel wear of heavy-loaded wheels with large axle load.
[0006] The disclosure provides a railway wagon bogie using disc brake in view of the shortcomings of the above technologies, which may eliminate the wear of the wheel caused by the brake shoe of the traditional heavy axle load bogie, may eliminate the adverse effect on the wear of the wheel rail caused by the friction thermal load between the brake shoe and the wheel, and may greatly reduce the wear of the wheel during vehicle operation.
[0007] According to the present invention, there is provided a railway wagon bogie using disc brake, comprising: wheel set assemblies, side frame assemblies, bearings pressed on both ends of the wheel set assemblies, axle box devices located on the bearings, bearing spring groups mounted on spring bearing platforms of center frames of the side frame assemblies, inclined wedge damping devices, a '0 bolster assembly, a foundation brake, and side-bearing assemblies, wherein, both ends of the bolster assembly are installed in the center frames of the side frame assemblies, and fallen on the bearing spring groups; the side-bearing assemblies are placed in casting side-bearing boxes at both ends of the bolster assembly; the inclined wedge damping devices are installed between notches at both ends of the bolster assembly and column wearing plates of the side frame assemblies; and the foundation brake is installed under both sides of the bolster assembly, and upper parts of the axle box devices contact a guide frame wearing plate of the side frame assemblies, and wherein: the bolster assembly comprises bolsters, two pipe supports symmetrically installed on two side faces of a center of the bolster assembly, and two groups of hanger bracket assemblies symmetrically installed on both ends of the bolster assembly, each group of hanger bracket assemblies including two hangers symmetrically installed on two side faces of the bolsters; the foundation brake comprises brake clamp units and a brake pipe system; each set of brake clamp units includes a brake cylinder, a brake lever, a hanger, a brake pad holder and brake pads; a middle portion of the brake lever is connected to both sides of a lower end of the hanger through a pin shaft; one end of the brake lever is connected to the brake cylinder, and the other end thereof is connected to the brake pad holder; the brake pads are installed on an inner side of the brake pad holder; the hanger of each set of brake clamp units is connected to the hanger bracket corresponding to a respective bolster; and one pipe support in the bolster assembly is connected to a first air pipe seat of the brake pipe system, likewise, another pipe support in the bolster assembly is connected to a second air pipe seat of the brake pipe system.
[0008] Also disclosed herein is a railway wagon bogie using disc brake comprising: wheel set assemblies, side frame assemblies, bearings pressed on both ends of the wheel set assemblies, axle box devices located on the bearings, bearing spring groups mounted on spring bearing platforms of center frames of the side frame assemblies, inclined wedge damping devices, bolster assemblies, a '0 foundation brake, and side-bearing assemblies. Both ends of the bolster assemblies are installed in the center frames of the side frame assemblies, and fallen on the bearing spring groups; the side-bearing assemblies are placed in casting side-bearing boxes at both ends of the bolster assemblies; the inclined wedge damping devices are installed between notches at both ends of the bolster assemblies and column wearing plates of the side frame assemblies; the foundation brake is installed under both sides of the bolster assemblies, and upper parts of the axle box devices contact a guide frame wearing plate of the side frame assemblies. The bolster assembly comprises a bolster, two pipe supports symmetrically installed on two side faces of a center of bolster, and two groups of hanger bracket assemblies symmetrically installed on both ends of the bolster, each group of hanger bracket assemblies including two hangers symmetrically installed on two side faces of the bolster; the foundation brake comprises brake clamp units and a brake pipe system; each set of brake clamp units includes a brake cylinder, a brake lever, a hanger, a brake pad holder and brake pads; a middle portion of the brake lever is connected to both sides of a lower end of the hanger through a pin shaft; one end of the brake lever is connected to the brake cylinder, and the other end thereof is connected to the brake pad holder; the brake pads are installed on an inner side of the brake pad holder; the hanger of each set of brake clamp units is connected to the hanger bracket corresponding to the bolster; one pipe support in the bolster assembly is connected to a first air pipe seat of the brake pipe system, likewise, another pipe support in the bolster assembly is connected to a second air pipe seat of the brake pipe system.
[0009] In some embodiments, the wheel set assembly comprises an axle, a pair of wheels and a pair of brake discs, the pair of brake discs being symmetrically installed on the brake disc seat of an inner side of the axle through an interference fit, and the pair of wheels being symmetrically installed on a wheel seat of an outer side of the axle through an interference fit.
[0010] In some embodiments, a number of cooling ribs are distributed between two annular disc surfaces of the brake disc.
[0011] In some embodiments, the brake disc seat has a larger diameter than the wheel seat, and a smooth transition is achieved between the wheel seat and the brake disc seat through an arc.
[0012] In some embodiments, the inclined wedge damping device comprises an inclined wedge, an inclined wedge friction plate and a damping spring. The damping spring comprises a damping outer spring and a damping inner spring in coaxial arrangement; the damping spring is installed directly below the inclined wedge and between the column wearing plates of the side frame assembly; and an auxiliary friction surface of the inclined wedge contacts with a bolster wearing plate installed on an '0 inclined surface of a notch of the bolster assembly.
[0013] In some embodiments, upper and lower parts of a main friction vertical surface of the inclined wedge are provided with friction plate ribs for stopping the inclined wedge friction plate.
[0014] In some embodiments, the bearing spring groups include a bearing outer spring, a bearing inner spring, and an inner-inner spring, which are arranged coaxially. A height of an end face of the inner inner spring is equal to or lower than that of an end face of the bearing inner spring, and the end face of the bearing inner spring is lower than an end face of the bearing outer spring.
[0015] In some embodiments, the brake cylinder is internally provided with a disc clearance adjustment mechanism, and the disc clearance adjustment mechanism includes an adjusting shaft, a guide nut and an adjusting nut, one end of the adjusting shaft being connected to a piston of the brake cylinder, and the other end of the adjusting shaft passing through the guide nut and the adjusting nut to be connected to the brake lever.
[0016] In some embodiments, a lower part of each of the hanger brackets is an open U-shaped structure, and a lower mounting surface is cast with a boss, and the hanger brackets are symmetrically arranged on the bolster.
[0017] In some embodiments, a wearing plate is installed on an inner side rib of each notch of the bolster, and an inner side of the notch and an outer side of the notch of the bolster are transited through a bevel or an arc.
[0018] The bearing spring groups are mounted between the bolster and the side frame of the bogie according to some embodiments, which can adapt to larger changes of load between empty and heavy loaded vehicles. The brake disc may be used to eliminate the grinding wear of the brake shoe on the wheel when the vehicle is braking, and the influence of constant temperature rise and fall on the performance of the wheel material when the wheel and brake shoe rub against each other. In addition, the disc brake power comes from an external air supply inflating the brake cylinder, and through the lever amplification principle of the brake clamp units, the force output by the brake cylinder is finally converted into a positive pressure on the brake pads and the brake disc, and a friction braking force is generated between the brake pads and the brake disc through friction, which functions to brake. The disc brake has a larger brake friction area than the wheel shoe brake, has a controllable brake friction area and has better braking effect and longer maintenance cycle, it avoids the waste of manpower, material resources, and time in replacing brake shoes, and has better economic benefits.
[0018A] Embodiments of the present invention will now be described, by way of non-limiting example '0 only, with reference to the accompanying drawings, in which:
[0019] FIG.1 shows a structural diagram of an railway wagon bogie using disc brake according to some embodiments of the disclosure;
[0020] FIG. 2 shows a structural diagram of a bolster assembly of FIG. 1;
[0021] FIG. 3 shows a structural diagram of a hanger bracket of FIG. 2;
[0022] FIG. 4 shows a structural diagram of inclined wedge damping devices and bearing spring groups of FIG. 1;
[0023] FIG. 5 shows a structural diagram of an inclined wedge of FIG. 4;
[0024] FIG. 6 shows a structural diagram of a foundation brake of FIG. 1;
[0025] FIG. 7 shows a structural diagram of a wheel set assembly of FIG. 1; and
[0026] FIG. 8 shows a structural diagram of a disc clearance adjustment mechanism of FIG. 6.
[0027] Reference Numbers: wheel set assembly 1 (wheel 1.1, brake disc 1.2, axle 1.3, cooling rib 1.4, wheel seat 1.5, brake disc seat 1.6), side frame assembly 2, inclined wedge damping device 3 (inclined wedge friction plate 3.1, inclined wedge 3.2, damping outer spring 3.3, damping inner spring 3.4, auxiliary friction surface 3.5, mounting hole 3.6, main friction vertical surface 3.7, friction plate rib 3.8), bolster assembly 4 (bolster 4.1, center disc wearing disc 4.2, pipe support 4.3, bolster wearing plate 4.4, wearing plate 4.5, hanger bracket 4.6, boss 4.7), foundation brake 5 (brake cylinder 5.1, brake lever 5.2, hanger 5.3, a brake pad holder 5.4, brake pad 5.5, disc clearance adjustment mechanism 5.6, first air pipe seat 5.7, brake air pipe 5.8, parking air pipe 5.9, second air pipe seat 5.10, bolt 5.11, adjusting shaft 5.12, guide nut 5.13, adjusting nut 5.14), bearing 6, bearing spring group 7 (bearing outer spring 7.1, bearing inner spring 7.2, inner-inner spring 7.3), side-bearing assembly 8, axle box device 9.
[0028] The disclosure will be described in further detail below in conjunction with the drawings and specific embodiments.
[0029] The railway wagon bogie using disc brake as shown in FIG. 1 comprises wheel set assemblies 1, side frame assemblies 2, inclined wedge damping devices 3, bolster assemblies 4, a foundation brake 5, bearings 6, bearing spring groups 7, side-bearing assemblies 8 and axle box devices 9. The bearings 6 are pressed on both ends of the wheel set assemblies 1. The axle box devices 9 are located on the bearings 6, and the upper parts of the axle box devices 9 contact guide frame wearing plates of the side frame assemblies 2. The bearing spring groups 7 are mounted on spring bearing platforms of '0 center frames of the side frame assemblies 2. Both ends of the bolster assemblies 4 are installed in the center frames of the side frame assemblies 2, and fallen on the bearing spring groups 7. The side bearing assemblies 8 are placed in casting side-bearing boxes at both ends of the bolster assemblies 3. The inclined wedge damping devices 3 are installed between notches at both ends of the bolster assemblies 3 and column wearing plates of the side frame assemblies 2. The foundation brake 5 is installed under hanger brackets on both sides of the bolster assemblies 4 by means of bolts.
[0030] As shown in FIG. 2, the bolster assembly 4 comprises a bolster 4.1, a center disc wearing plate 4.2 installed inside a center disc of the bolster 4.1, two pipe supports 4.3 symmetrically installed on two side faces of the center of bolster 4.1, a bolster wearing plate 4.4 installed on an inclined surface of a notch at an end of the bolster 4.1, and two groups of hanger bracket assemblies symmetrically installed on both ends of the bolster 4.1, each group of hanger bracket assemblies including two hanger brackets 4.6 symmetrically installed on both side faces of the bolster 4.1. Each hanger bracket 4.6 is provided with four round holes. A lower part of the hanger bracket 4.6 is an open U-shaped structure, and a lower mounting surface is cast with a boss 4.7 to ensure that the mounting surfaces of the four hanger brackets 4.6 are of the same height. As shown in FIG. 3, the structure of the notch of the bolster 4.1 in the bolster assemblies 4 is of a U-shaped notch structure that reduces step by step, with a smaller width at an inner side of the notch and a larger width at an outer side of the notch than the inner side, to match the widened structure of a main friction surface of the inclined wedge. A wearing plate 4.5 is installed on an inner side rib of each notch of the bolster 4.1 to adapt to the wear caused by longitudinal stopping between the deflected bolster and the column of the side frame assemblies 2, and to function as a limit stop. In this embodiment, the inner side of the notch is narrower, whose width is within the range of 170-200 mm, and outer side of the notch is wider, whose width is within the range of 190-260 mm. The inner side of the notch and the outer side of the notch are transited through a bevel or an arc.
[0031] As shown in FIG. 4 and FIG. 5, the inclined wedge damping device 3 includes an inclined wedge 3.2, an inclined wedge friction plate 3.1 and a damping spring. The damping spring includes an outer damping spring 3.3 and an inner damping spring 3.4 arranged in a coaxial manner. The damping spring is installed directly below the inclined wedge 3.2 and between the column wearing plates of the side frame assembly 2. An auxiliary friction surface 3.5 of inclined wedge 3.2 contacts the bolster wearing plate 4.4 installed on the inclined surface of the notch of the bolster assembly 4, and during the operation, the bolster 4.1 transfers a horizontal load to the inclined wedge 3.2 through '0 the inclined surface of the notch and an inner side face of the notch. A raised round table in the middle portion of the inclined wedge friction plate 3.1 fits into the mounting hole 3.6 on a main friction vertical surface of inclined wedge 3.2. When the inclined wedge friction plate 3.1 and inclined wedge 3.2 vertically move relative to the column wear plates of the side frame assembly 2, the upper and lower friction plate ribs 3.8 on the main friction vertical surface of the inclined wedge 3.2 can stop the inclined wedge friction plate 3.1. The width of the inclined wedge friction plate 3.1 is the same as the maximum width of the main friction vertical surface 3.7 of the inclined wedge 3.2. The main friction vertical surface 3.7 of the inclined wedge 3.2 is wider than the auxiliary friction surface 3.5, and widening of the main friction vertical surface 3.7 of the inclined wedge 3.2 can improve the diamond resistance stiffness provided by the inclined wedge damping device 3. In this embodiment, the width of the auxiliary friction surface 3.5 of the inclined wedge 3.2 is within the range of 160-190 mm, and the width of the main friction vertical surface 3.7 of the inclined wedge 3.2 is within the range of 180~240 mm.
[0032] As shown in FIG. 6, a foundation brake 5 includes four sets of brake clamp units and a brake pipe system. Each set of brake clamp units includes a brake cylinder 5.1, a brake lever 5.2, a hanger 5.3, a brake pad holder 5.4 and brake pads 5.5. The brake pipe system includes a brake air pipe 5.8, a parking air pipe 5.9, a first air pipe seat 5.7 and a second air pipe seat 5.10; one end of the brake air pipe 5.8 is connected to the first air pipe seat 5.7, and the other end of the brake air pipe 5.8 is connected to the second air pipe seat 5.10. Similarly, one end of the parking air pipe 5.9 is connected to the first air pipe seat 5.7, and the other end of the parking air pipe 5.9 is connected to the second air pipe seat 5.10. Two brake cylinders 5.1 are connected to the first air pipe seat 5.7 through pipes, and the other two brake cylinders 5.1 are connected to the second air pipe seat 5.10 through pipes. The hanger 5.3 of each set of brake clamp units is connected to the hanger bracket 4.6 corresponding to the bolster 4.1 through four bolts 5.11. A middle portion of the brake lever 5.2 is connected to both sides of a lower end of the hanger 5.3 through a pin shaft. One end of the brake lever 5.2 is connected to the brake cylinder 5.1, and the other end thereof is connected to the brake pad holder 5.4. The brake pads 5.5 are installed on an inner side of the brake pad holder 5.4. One pipe support 4.3 in the bolster assembly 4 is bolted to the first air pipe seat 5.7 in the foundation brake 5. Likewise, another pipe support 4.3 in the bolster assembly 4 is bolted to the second air pipe seat 5.10 in the foundation brake 5. An air source for wagon body braking is transmitted to the brake cylinders simultaneously through the first air pipe seat 5.7, the second air pipe seat 5.10, and the brake air pipe 5.8 or parking air pipe 5.9. The brake air pipe and the parking air pipe both pass through a hole at the middle portion of the '0 bolster 4.1. The brake cylinder is inflated, and the force output by the brake cylinder is converted into a positive pressure applied to the brake pads 5.5 and the brake disc 1.2 through the lever amplification principle of the brake clamp unit. A friction brake force is generated between the brake pads 5.5 and the brake disc 1.2 through friction, which is finally transferred to the wheels for braking, that is, the brake cylinders in the brake clamp units realizes braking or parking braking through the action of air source. When the wagon is empty, the brake pads of the brake clamp units are installed with their center deviated towards the upper part of the axle, with a deviation distance of 15-45 mm. The brake clamp units are hung under the hanger bracket of the bolster by means of bolts, and the hanger 5.3 and brake lever 5.2 are connected through the pin shaft to adapt to the lateral displacement of the bolster of the three-piece bogie and the relative movement of yawing of the wheel set.
[0033] As show in FIG. 7, the wheel set assembly 1 comprises an axle 1.3, a pair of wheels 1.1 and a pair of brake discs 1.2. The pair of brake discs 1.2 are symmetrically installed on the brake disc seat 1.6 on an inner side of axle 1.3 through interference fit, and the pair of wheels 1.1 are symmetrically installed on the wheel seat 1.5 on an outer side of axle 1.1 through interference fit. As the diameter of the brake disc seat 1.6 is larger than that of the wheel seat 1.5, smooth transition between the wheel seat 1.5 and the brake disc seat 1.6 is realized through an arc. In this embodiment, a number of cooling ribs 1.4 are distributed between two annular disc surfaces of brake disc 1.2. The heat generated by friction between the two annular disc surfaces and the brake pads 5.5 in the foundation brake disc 5 is passively dissipated through the cooling ribs, so that the temperature of the friction pair will not become too high, thus the performance of the friction material is stable, and the service life of the friction material is extended.
[0034] Again as shown in FIG. 4, the bearing spring group 7 include a bearing outer spring 7.1, a bearing inner spring 7.2, and an inner-inner spring 7.3, which are arranged coaxially. When the wagon is empty, the secondary spring stiffness is only provided by the bearing outer spring 7.1 and the damping outer spring 3.3, so that the stiffness is small. During the load increases to the extent that the wagon is heavy, the spring height is compressed, and the inner-inner spring 7.3 is also used for carrying in addition to the bearing inner spring 7.2 and the damping inner spring 3.4, thus the secondary spring stiffness increases more obviously to maintain a small change of height of the spring from empty to heavy-loaded wagons, and it is also adapted to the situation in which the foundation brake 5 is installed on the bolster assembly 4, and its vertical displacement along with the bolster assembly 4 should not be too large, resulting in incomplete overlap of the brake disc and brake pad friction area and uneven wear. In addition, the height of the end face of the inner-inner spring 7.3 is equal to or lower than that '0 of the end face of the bearing inner spring 7.2, and the end face of the bearing inner spring 7.2 is lower than the end face of the bearing outer spring 7.1, and because of such spring height difference between the empty wagon and heavy-loaded wagon, under an empty state of wagon, the foundation brake 5 is installed on the bolster assembly to ensure that a center height of the brake pads 5.5 is higher than a horizontal height of the axle center, and under a heavy-loaded state of wagon, the center of the brake pads is slightly lower than the center of the axle, but the bottom end of the brake pads shall not be lower than the friction surface of the brake disc 1.2.
[0035] As shown in FIG. 8, each brake cylinder is internally provided with a disc clearance adjustment mechanism 5.6, which includes an adjusting shaft 5.12, a guide nut 5.13 and an adjusting nut 5.14, one end of the adjusting shaft 5.12 being connected to a piston of the brake cylinder 5.1, and the other end of the adjusting shaft 5.12 passing through the guide nut 5.13 and the adjusting nut 5.14 to be connected to the brake lever 5.2. During braking, due to the excessive clearance caused by the wear of brake pads 5.5 and brake disc 1.2, or the excessive clearance between brake pads 5.5 and brake disc
1.2 after replacing the brake pads, the adjusting nut is loosened to adjust the adjusting shaft, so as to adjust the clearance between the brake pads and the brake disc, ensuring a normal clearance between the brake pads and the brake disc.
[0036] The foundation brake is arranged on the bolster assembly, which is assembled on the hanger bracket 4.6 of the bolster 4.1 through the hanger 5.3. This arrangement is simple and compact. While meeting the braking requirements, sufficient design space is reserved for the bolster and side frame assemblies, so that the overall width and central sectional height of the bolster and side frame assemblies as well as the size of surface of the center plate of the bolster are not limited by the structural size and installation position of the brake components, and the axle load design can be over 40 t, which can meet the strength design requirement of bogie with large axle load, and a better load sharing performance is realized.
[0037] The bogie uses the brake disc, which eliminates the grinding wear of the brake shoe on the wheel during braking, and the influence of constant temperature rise and fall on the wheel material performance when the wheel and brake shoe rub against each other. In addition, the disc brake power comes from an external air supply inflating the brake cylinder, and through the lever amplification principle of the brake clamp units, the force output by the brake cylinder isfinally converted into the positive pressure on the brake pads and the brake disc, and a friction braking force is generated between the brake pads and the brake disc through friction, which functions to brake. The disc brake has a larger brake friction area than the wheel shoe brake, has a controllable brake friction area and '0 has better braking effect and longer maintenance cycle, it avoids the waste of manpower, material resources, and time in replacing brake shoes, and has better economic benefits.
[0038] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.
[0039] Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
[0040] While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. It will be apparent to a person skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Thus, the present invention should not be limited by any of the above described exemplary embodiments.
Claims (10)
1. A railway wagon bogie using disc brake, comprising: wheel set assemblies, side frame assemblies, bearings pressed on both ends of the wheel set assemblies, axle box devices located on the bearings, bearing spring groups mounted on spring bearing platforms of center frames of the side frame assemblies, inclined wedge damping devices, a bolster assembly, a foundation brake, and side bearing assemblies, wherein, both ends of the bolster assembly are installed in the center frames of the side frame assemblies, and fallen on the bearing spring groups; the side-bearing assemblies are placed in casting side-bearing boxes at both ends of the bolster assembly; the inclined wedge damping devices are installed between notches at both ends of the bolster assembly and column wearing plates of the side frame assemblies; and the foundation brake is installed under both sides of the bolster assembly, and upper parts of the axle box devices contact a guide frame wearing plate of the side frame assemblies, and wherein: the bolster assembly comprises bolsters, two pipe supports symmetrically installed on two side faces of a center of the bolster assembly, and two groups of hanger bracket assemblies symmetrically installed on both ends of the bolster assembly, each group of hanger bracket assemblies including two hangers symmetrically installed on two side faces of the bolsters; the foundation brake comprises brake clamp units and a brake pipe system; each set of brake clamp units includes a brake cylinder, a brake lever, a hanger, a brake pad holder and brake pads; a middle portion of the brake lever is connected to both sides of a lower end of the hanger through a pin shaft; one end of the brake lever is connected to the brake cylinder, and the other end thereof is connected to the brake pad holder; the brake pads are installed on an inner side of the brake pad holder; the hanger of each set of brake clamp units is connected to the hanger bracket corresponding to a respective bolster; and one pipe support in the bolster assembly is connected to a first air pipe seat of the brake pipe system, likewise, another pipe support in the bolster assembly is connected to a second air pipe seat of the brake pipe system.
2. The railway wagon bogie using disc brake of claim 1, wherein the wheel set assembly comprises an axle, a pair of wheels and a pair of brake discs, the pair of brake discs being symmetrically installed on the brake disc seat of an inner side of the axle through an interference fit, and the pair of wheels being symmetrically installed on a wheel seat of an outer side of the axle through an interference fit.
3. The railway wagon bogie using disc brake of claim 2, wherein a number of cooling ribs are distributed between two annular disc surfaces of the brake disc.
4. The railway wagon bogie using disc brake of claim 2 or 3, wherein the brake disc seat has a larger diameter than the wheel seat, and a smooth transition is achieved between the wheel seat and the brake disc seat through an arc.
5. The railway wagon bogie using disc brake of any one of the preceding claims, wherein the inclined wedge damping device comprises an inclined wedge, an inclined wedge friction plate and a damping spring, wherein, the damping spring comprises a damping outer spring and a damping inner spring in coaxial arrangement; the damping spring is installed directly below the inclined wedge and between the column wearing plates of the side frame assembly; and an auxiliary friction surface of the inclined wedge contacts with a bolster wearing plate installed on an inclined surface of a notch of the bolster assembly.
6. The railway wagon bogie using disc brake of claim 5, wherein upper and lower parts of a main friction vertical surface of the inclined wedge are provided with friction plate ribs for stopping the inclined wedge friction plate.
7. The railway wagon bogie using disc brake of any one of the preceding claims, wherein the bearing spring groups include a bearing outer spring, a bearing inner spring, and an inner-inner spring, which are arranged coaxially; a height of an end face of the inner-inner spring is equal to or lower than that of an end face of the bearing inner spring, and the end face of the bearing inner spring is lower than an end face of the bearing outer spring.
8. The railway wagon bogie using disc brake of any one of the preceding claims, wherein the brake cylinder is internally provided with a disc clearance adjustment mechanism, and the disc clearance adjustment mechanism includes an adjusting shaft, a guide nut and an adjusting nut , one end of the adjusting shaft being connected to a piston of the brake cylinder, and the other end of the adjusting shaft passing through the guide nut and the adjusting nut to be connected to the brake lever.
9. The railway wagon bogie using disc brake of any one of the preceding claims, wherein a lower part of each of the hanger brackets is an open U-shaped structure; a lower mounting surface of the hanger brackets is cast with a boss; and the hanger brackets are symmetrically arranged on respective bolsters.
10. The railway wagon bogie using disc brake of any one of claims 1 to 4, wherein a wearing plate is installed on an inner side rib of each notch of the bolster, and an inner side of the notch and an outer side of the notch of the bolster are transited through a bevel or an arc.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023009544.4U CN214164992U (en) | 2020-12-14 | 2020-12-14 | Disc type braking railway wagon bogie |
| CN202023009544.4 | 2020-12-14 | ||
| CN202011472232.9 | 2020-12-14 | ||
| CN202011472232.9A CN112441044A (en) | 2020-12-14 | 2020-12-14 | Disc type braking railway wagon bogie |
| PCT/CN2021/110234 WO2022127133A1 (en) | 2020-12-14 | 2021-08-03 | Railway wagon bogie using disc brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2021402336A1 AU2021402336A1 (en) | 2022-12-15 |
| AU2021402336B2 true AU2021402336B2 (en) | 2024-06-06 |
Family
ID=82060032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021402336A Active AU2021402336B2 (en) | 2020-12-14 | 2021-08-03 | Railway wagon bogie using disc brake |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2021402336B2 (en) |
| WO (1) | WO2022127133A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114954551B (en) * | 2022-08-02 | 2022-11-18 | 秦皇岛优益创联特种车辆制造有限公司 | Power bogie of highway-railway transport vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE545774A (en) * | 1955-03-03 | |||
| CH387684A (en) * | 1960-08-25 | 1965-02-15 | Reunis Sa Ateliers | Air suspension bogie |
| US3720175A (en) * | 1970-12-28 | 1973-03-13 | Budd Co | Resiliently mounted railway vehicle truck |
| CN2517641Y (en) * | 2001-12-17 | 2002-10-23 | 齐齐哈尔铁路车辆(集团)有限责任公司 | High speed van steering bogie |
| CN200945865Y (en) * | 2006-07-19 | 2007-09-12 | 中国南车集团眉山车辆厂 | Fast railway freight-car turning bracket |
| CN112441044A (en) * | 2020-12-14 | 2021-03-05 | 中车长江车辆有限公司 | Disc type braking railway wagon bogie |
-
2021
- 2021-08-03 AU AU2021402336A patent/AU2021402336B2/en active Active
- 2021-08-03 WO PCT/CN2021/110234 patent/WO2022127133A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| AU2021402336A1 (en) | 2022-12-15 |
| WO2022127133A1 (en) | 2022-06-23 |
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