WO2015098091A1 - 鉄道車両台車用の荷重計測装置 - Google Patents
鉄道車両台車用の荷重計測装置 Download PDFInfo
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- WO2015098091A1 WO2015098091A1 PCT/JP2014/006393 JP2014006393W WO2015098091A1 WO 2015098091 A1 WO2015098091 A1 WO 2015098091A1 JP 2014006393 W JP2014006393 W JP 2014006393W WO 2015098091 A1 WO2015098091 A1 WO 2015098091A1
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- WIPO (PCT)
- Prior art keywords
- load
- electrode
- sensor
- elastic body
- vibration
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/04—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles
- G01G19/042—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles having electrical weight-sensitive devices
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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
- B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
- B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
- B61F5/301—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating metal springs
-
- 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
- B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
- B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
- B61F5/301—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating metal springs
- B61F5/302—Leaf springs
-
- 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
- B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
- B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
- B61F5/305—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating rubber springs
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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
- B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
- B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
- B61F5/308—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating damping devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/02—Profile gauges, e.g. loading gauges
Definitions
- the present invention relates to a load measuring device used for a railway vehicle bogie in which an elastic body made of vibration-proof rubber or a suspension spring is interposed between an axle box and a bogie frame.
- Patent Document 1 proposes a wheel load measuring device that measures wheel load using the liner.
- the liner of this wheel load measuring device has a pressure sensor sandwiched between two thin adjustment plates, and the wheel load is calculated from the output from the pressure sensor.
- Patent Document 1 describes that the thickness of the pressure sensor is several tens to one hundred and several tens of micrometers, and the thickness of the entire liner is about 1 to 3 mm.
- the pressure sensor is strongly compressed even when the carriage is stationary, and in addition, the pressure sensor is a very thin built-in liner. Since it is in the form of a sheet, there is not much room for further compression in the pressure sensor even if wheel load fluctuations occur during vehicle travel. For this reason, the sensitivity of the pressure sensor is low, and it is difficult to measure the wheel load while the vehicle is traveling with high accuracy.
- the liner is selectively installed for wheel load adjustment, and depending on the type of carriage, the liner may not be installed. Therefore, the wheel weight measuring device using the liner is not applicable to all carriages.
- an object of the present invention is to provide a load measuring device for a railway vehicle bogie that can improve measurement accuracy while being easily applicable to various bogies.
- a load measuring device for a railway vehicle bogie is a load measuring device used for a railcar bogie in which a first elastic body made of a vibration-proof rubber or a suspension spring is interposed between an axle box and a bogie frame.
- the first elastic body is arranged in parallel with the first elastic body and is deformed in conjunction with elastic deformation in one of the vertical direction and the lateral direction of the first elastic body that supports the downward load from the bogie frame.
- a load variation sensor is provided, and the first load variation sensor deforms in conjunction with the elastic deformation in the one direction of the first elastic body, thereby causing a change in electrical output.
- the first load variation sensor is arranged in parallel with the first elastic body made of the vibration-proof rubber or the suspension spring interposed between the axle box and the carriage frame. Is deformed according to fluctuations in the load in the vertical direction or the lateral direction (vehicle width direction) of the first elastic body in a state where the downward load from the carriage frame is borne by the first elastic body. Therefore, the first load variation sensor can sufficiently secure a room for further deformation when the carriage is stationary. Therefore, the sensitivity of the first load fluctuation sensor can be increased, and the measurement accuracy can be improved. Moreover, since the first load variation sensor is arranged in parallel with the first elastic body made of the vibration proof rubber or the suspension spring, it can be easily applied to any cart equipped with the vibration proof rubber or the suspension spring. it can.
- the measurement accuracy can be improved while being easily applied to various carts.
- FIG. 3 is a sectional view taken along line III-III in FIG. 2.
- FIG. 4 is a sectional view taken along line IV-IV in FIG. 2.
- FIG. 3 is a sectional view taken along line III-III in FIG. 2.
- FIG. 4 is a sectional view taken along line IV-IV in FIG. 2.
- FIG. 1 is a side view of a railway vehicle bogie 1 according to the first embodiment.
- a carriage 1 includes a bolster 3 that supports a vehicle body (not shown) via an air spring 2 that serves as a secondary suspension spring, and a carriage that supports the bolster 3 so as to be relatively rotatable in the yawing direction.
- the carriage frame 4 has a lateral beam 5 extending in the lateral direction (vehicle width direction) at the center in the longitudinal direction (front-rear direction) of the vehicle, but does not have a so-called side beam.
- An axle 6 extending in the lateral direction is disposed in front of and behind the side beam 5, and wheels 7 are fixed to both sides of the axle 6 in the lateral direction.
- bearings 8 that rotatably support the axle 6 are provided outside the wheels 7 in the lateral direction, and the bearings 8 are accommodated in an axle box 9.
- the axle box 9 is elastically connected to both ends of the lateral beam 5 in the vehicle width direction by a connecting device 20.
- the coupling device 20 includes a pair of shaft beams 13 that protrude integrally from the axle box 9 toward the side beam 5 and a pair of columns that protrude from the side beam 5 toward the shaft beam 13 and that are spaced apart in the horizontal direction.
- a leaf spring 10 extending in the longitudinal direction of the vehicle is bridged between the lateral beam 5 and the axle box 9, and the longitudinal center portion 10 a of the leaf spring 10 is connected to both lateral ends of the lateral beam 5 from below.
- the end portions 10b on both sides in the longitudinal direction of the leaf spring 10 are supported by the axle box 9 from below. That is, the leaf spring 10 has both the function of the primary suspension spring and the function of the conventional side beam.
- the leaf spring 10 is formed of, for example, a fiber reinforced resin, and the central portion 10a of the leaf spring 10 is disposed so as to sink under the lateral beam 5 between the pair of receiving seats 11 and 11.
- a pressing member 12 having an arc-shaped lower surface in a side view is provided at the lower part of both lateral end portions of the horizontal beam 5, and the lower surface of the pressing member 12 is placed on the central portion 10a of the leaf spring 10 from above. . That is, the pressing member 12 pushes the central portion 10a of the leaf spring 10 downward by a downward load (such as a vehicle body load) transmitted by the lateral beam 5 without fixing the leaf spring 10 in the vertical direction.
- a downward load such as a vehicle body load
- a shaft box cover 15, a first vibration isolation rubber unit 16, a wedge-shaped member 17, a second vibration isolation rubber unit 18, a spring seat 19, and the like are stacked in that order from the bottom. .
- An end portion 10b of the leaf spring 10 is placed on the spring seat 19 from above via an elastic sheet 34 (rubber sheet).
- Each end portion 10b of the leaf spring 10 is supported in a posture in which the upper surface thereof is inclined in a direction toward the central portion 10a.
- the central portion 10a of the leaf spring 10 is pushed downward by the pressing member 12, and the leaf spring 10 Is formed in a bow shape convex downward as a whole in a side view.
- the bogie 1 is provided with a vertical load fluctuation sensor 21 so as to follow the elastic deformation of the first vibration isolating rubber unit 16 in the vertical direction when the vehicle is running.
- the vertical load fluctuation sensor 21 is arranged in parallel with the first vibration isolating rubber unit 16 in the load transmission path from the carriage frame 4 to the wheels 7.
- the vertical load fluctuation sensor 21 is disposed outside the first vibration isolating rubber unit 16 in plan view.
- the cart 1 is provided with a first lateral load variation sensor 22A and a second lateral load variation sensor 22B so as to follow the elastic deformation in the lateral direction of the second vibration isolating rubber unit 18 when the vehicle travels.
- the first and second lateral load variation sensors 22 ⁇ / b> A and 22 ⁇ / b> B are arranged in parallel with the second vibration isolating rubber unit 18 in the load transmission path from the carriage frame 4 to the wheels 7.
- the first and second lateral load variation sensors 22A and 22B are disposed outside the second vibration isolating rubber unit 18 in plan view.
- FIG. 2 is a side view of an essential part of the cart 1 shown in FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
- FIG. 5 is a front view of the main part viewed from the V direction of FIG.
- the axle box 9 has a protruding portion 9 a that protrudes upward from the upper surface thereof.
- the axle box 9 is covered with an axle box cover 15 from above.
- the axle box cover 15 has a cylindrical portion 15a protruding upward at the center thereof.
- the shaft box cover 15 is positioned in the horizontal direction with respect to the shaft box 9 by fitting the cylindrical portion 15a to the protruding portion 9a.
- the bearing cover 15 has a reverse concave shape in cross section, and a seal member 15 is interposed between the inner surface of the bearing cover 15 and the outer surface of the bearing 9.
- One or more thin (for example, 1 to 3 mm) liners 25 are inserted between the lower surface of the bearing cover 15 and the upper surface of the bearing 9.
- the bearing cover 15 has a lower bracket portion 15b that protrudes outward in the horizontal direction (for example, outward in the vehicle longitudinal direction) from the first vibration isolation rubber unit 16 and has a horizontal upper surface. .
- the first anti-vibration rubber unit 16 is placed on the bearing cover 15 from above.
- the first anti-vibration rubber unit 16 includes an annular lower plate 27, an annular upper plate 28, and an anti-vibration rubber 29 sandwiched between the lower plate 27 and the upper plate 28.
- the lower end surface and the upper end surface of the anti-vibration rubber 29 are bonded to the lower plate 27 and the upper plate 28.
- the lower plate 27 of the first anti-vibration rubber unit 16 is positioned in the horizontal direction with respect to the bearing cover 15 by fitting into the cylindrical portion 15a.
- a wedge-shaped member 17 is placed on the first anti-vibration rubber unit 16 from above.
- the wedge-shaped member 17 is made of, for example, metal and has rigidity.
- the lower surface of the wedge-shaped member 17 is a horizontal plane.
- the upper surface of the wedge-shaped member 17 is an inclined surface that is inclined so as to face the center side in the vehicle longitudinal direction of the carriage 1. That is, the upper surface of the wedge-shaped member 17 is an inclined surface that becomes higher as going outward in the vehicle longitudinal direction.
- a concave portion 17 a is formed at the center of the lower surface of the wedge-shaped member 17.
- the wedge-shaped member 17 is positioned with respect to the axle box cover 15 in the horizontal direction by fitting the concave portion 17 a to the cylindrical portion 15 a via the ring spacer 30.
- the upper plate 28 of the first anti-vibration rubber unit 16 is also indirectly positioned with respect to the axle box cover 15 in the horizontal direction. That is, the first anti-vibration rubber unit 16 is positioned so that the upper plate 28 is not displaced relative to the lower plate 27 in the horizontal direction.
- the second vibration isolating rubber unit 18 is placed on the upper surface of the wedge-shaped member 17 from above.
- the second anti-vibration rubber unit 18 includes an annular lower plate 31, an annular upper plate 32, and an annular anti-vibration rubber 33 sandwiched between the lower plate 31 and the upper plate 32.
- the anti-vibration rubber 33 is made of the same material as the anti-vibration rubber 29. The lower end surface and the upper end surface of the vibration isolating rubber 33 are bonded to the lower plate 31 and the upper plate 32.
- a protruding portion 17b protruding upward is formed at the center of the upper surface of the wedge-shaped member 17, and the lower plate 31 of the second vibration isolating rubber unit 18 is fitted to the protruding portion 17b so that the wedge-shaped member 17 is fitted. It is positioned horizontally with respect to it.
- a spring seat 19 is placed on the upper surface of the second anti-vibration rubber unit 18 from above.
- the spring seat 19 has a recess 19 a that is open upward and is open toward the center of the carriage 1 in the longitudinal direction of the vehicle.
- An end 10b of the leaf spring 10 is placed on the recess 19a of the spring seat 19 from above via an elastic sheet 34 (rubber sheet).
- a projecting portion 17b projecting downward is formed on the lower surface of the spring seat 19, and the upper plate 32 of the second vibration isolating rubber unit 18 is horizontal with respect to the spring seat 19 by fitting into the projecting portion 19b.
- the lower plate 31 moves in the horizontal direction together with the wedge-shaped member 17, and the upper plate 32 moves in the horizontal direction together with the spring seat 19. Can be displaced relative to each other.
- the bogie 1 is equipped with a load measuring device 100 having a vertical load fluctuation sensor 21, a first lateral load fluctuation sensor 22A, a second lateral load fluctuation sensor 22B, and a computing unit 70.
- the computing unit 70 calculates the wheel load P during the vehicle travel from the stationary wheel weight input from the outside and the output related to the vertical load variation of the vertical load variation sensor 21 during the vehicle travel, and also during the vehicle travel.
- the lateral pressure Q of the wheel 7 during traveling of the vehicle is calculated from the output relating to the lateral load fluctuation of the first and second load fluctuation sensors 22A, 22B.
- the wedge-shaped member 17 has a horizontal lower surface that protrudes outward in the horizontal direction (for example, outward in the vehicle longitudinal direction) from the first vibration isolating rubber unit 16.
- the bracket 35 is fixed by fixtures B1 and B2 (for example, bolts).
- the upper bracket 35 may be fixed to the wedge-shaped member 17 by welding or adhesion without using a fixing tool, or may be formed as a part of the wedge-shaped member 17.
- the lower surface of the upper bracket 35 is opposed to the upper surface of the lower bracket portion 15b in the vertical direction.
- a vertical load variation sensor 21 is bonded to the lower surface of the upper bracket 35.
- a pressure contact member 36 made of an insulating material (for example, an elastic member made of rubber or the like) is bonded to the upper surface of the lower bracket portion 15 b, and the pressure contact member 36 is in pressure contact with the lower surface of the vertical load variation sensor 21.
- the vertical load variation sensor 21 includes a lower surface electrode 41 pressed against the upper surface of the pressure contact member 36, an upper surface electrode 42 bonded to the lower surface of the upper bracket 35, and a mediating member sandwiched between the lower surface electrode 41 and the upper surface electrode 42 in the vertical direction. 43. Since the pressure contact member 36 is made of an insulating material, the lower surface electrode 41 and the pressure contact member 36 are electrically insulated from each other. Since the adhesive interposed between the upper surface electrode 42 and the upper bracket 35 is made of an insulating material, the upper surface electrode 42 and the upper bracket 35 are also electrically insulated from each other.
- the vertical load fluctuation sensor 21 is arranged in parallel with the vibration isolating rubber 29 in the load transmission path from the bogie frame 4 to the wheel 7, and the vertical load fluctuation sensor 21 supports the downward load from the bogie frame 4 in the vertical direction.
- the lower surface electrode 41 moves in the vertical direction in conjunction with the vertical movement of the lower end surface of the vibration-proof rubber 29 via the lower plate 27, the axle box cover 15 and the pressure contact member 36.
- the lower surface electrode 41 is displaced in the vertical direction integrally with the lower plate 27 of the anti-vibration rubber unit 16.
- the upper surface electrode 42 moves in the vertical direction in conjunction with the vertical movement of the upper end surface of the vibration-proof rubber 29 via the upper plate 28, the wedge-shaped member 17, and the upper bracket 35. In other words, the upper surface electrode 42 is displaced in the vertical direction integrally with the upper plate 28 of the anti-vibration rubber unit 16.
- the mediating member 43 is made of a material different from that of the vibration-proof rubber 29.
- the intermediate member 43 is deformed by the relative movement of the lower surface electrode 41 and the upper surface electrode 42 in the vertical direction, and changes the electrical output (for example, voltage) from the lower surface electrode 41 and the upper surface electrode 42.
- the mediating member 43 is an elastic member made of a dielectric resin or elastomer, the capacitance between the electrodes 41 and 42 is increased by the change in the vertical distance between the lower surface electrode 41 and the upper surface electrode 42.
- the voltage between the lower surface electrode 41 and the upper surface electrode 42 can be changed.
- the voltage between the electrodes 41 and 42 can be changed by a load change in the vertical direction applied to the mediating member 43.
- the load variation sensor itself is a pressure-sensitive conductive rubber whose electrical resistance changes due to a change in pressure
- a change in the load applied to the pressure-sensitive conductive rubber causes a change in the opposite end of the pressure-sensitive conductive rubber. A change can be made to the voltage between.
- the medium member 43 has a deformation resistance smaller than that of the vibration-proof rubber 29.
- the deformation resistance of the mediating member 43 is 50% or less, preferably 10% or less, of the deformation resistance of the anti-vibration rubber 29.
- the spring constant of the mediating member 43 is smaller than the spring constant of the vibration isolating rubber 29.
- the spring constant of the mediating member 43 is 50% or less, preferably 10% or less of the spring constant of the vibration isolating rubber 29.
- the area of the mediating member 43 viewed from the vertical direction is smaller than the area of the vibration isolating rubber 29 viewed from the vertical direction.
- the area of the mediating member 43 is 50% or less, preferably 10% or less, of the area of the anti-vibration rubber 29.
- the thickness of the mediating member 43 in the vertical direction is 5 times or more, preferably 10 times or more, the thickness in the vertical direction of the upper surface electrode 41 and the lower surface electrode 42.
- a bracket 37 having a right bracket portion 37a formed with a vertical left side surface and a left bracket portion 37b formed with a vertical right side surface is fixed to the wedge-shaped member 17. It is fixed by tools B3 and B4 (for example, bolts).
- the right bracket portion 37a and the left bracket portion 37b protrude outward in the horizontal direction (for example, outward in the vehicle longitudinal direction) from the second vibration isolating rubber unit 18.
- the left side surface of the right bracket portion 37a and the right side surface of the left bracket portion 37b are opposed to each other with an interval in the horizontal direction.
- the bracket 37 may be fixed to the wedge-shaped member 17 by welding or adhesion without using a fixing tool, or may be formed as a part of the wedge-shaped member 17.
- a bracket 38 having a central bracket portion 38a inserted between the right bracket portion 37a and the left bracket portion 37b is fixed to the spring seat 19 by fixtures B5 and B6 (for example, bolts).
- the right side surface of the central bracket portion 38a is a vertical surface and faces the left side surface of the right bracket portion 37a with a gap.
- the left side surface of the central bracket portion 38a is a vertical surface and faces the right side surface of the left bracket portion 37b with a gap.
- the first lateral load variation sensor 22A and the second lateral load variation sensor 22B are bonded to the right side surface and the left side surface of the central bracket portion 38a, respectively.
- Pressure contact members 38 and 39 (for example, elastic members made of rubber or the like) made of an insulating material are bonded to the left side surface of the right bracket portion 37a and the right side surface of the left bracket portion 37b, respectively.
- the left side surface of the right pressure contact member 38 is in pressure contact with the outer side surface (right side surface) of the lateral load variation sensor 22A
- the outer side surface (right side surface) of the left pressure contact member 39 is in pressure contact with the left side surface of the lateral load variation sensor 22B. Yes.
- Each of the first and second lateral load fluctuation sensors 22A, 22B has the same structure as the vertical load fluctuation sensor 21, and is arranged in a posture rotated 90 ° around the vehicle longitudinal direction with respect to the vertical load fluctuation sensor 21.
- the first lateral load variation sensor 22A includes an outer surface electrode 51 (right side electrode) that is in pressure contact with the pressure contact member 38, and an inner side electrode 52 (left side electrode) that is bonded to the right side surface of the central bracket portion 38a. And a mediating member 53 sandwiched between the outer surface electrode 51 and the inner surface electrode 52 in the lateral direction.
- the second lateral load variation sensor 22B includes an outer side electrode 61 (left side electrode) that is pressed against the pressure contact member 39, an inner side electrode 62 (right side electrode) bonded to the left side of the central bracket portion 38a, and an outer side surface.
- the intermediate member 63 is sandwiched between the electrode 61 and the inner surface electrode 62 in the lateral direction. Since the press contact members 38 and 39 are made of an insulating material, the outer surface electrodes 51 and 61 and the press contact members 38 and 39 are electrically insulated from each other. Since the adhesive interposed between the inner surface electrodes 52 and 62 and the central bracket portion 38a is made of an insulating material, the inner surface electrodes 52 and 62 and the central bracket portion 38a are also electrically insulated from each other.
- the first and second lateral load fluctuation sensors 22A and 22B are arranged in parallel with the vibration isolating rubber 33 in the load transmission path from the carriage frame 4 to the wheels 7 and support the downward load from the carriage frame 4. It follows the elastic deformation of the vibration rubber 33 in the lateral direction. Specifically, the inner side electrodes 51 and 61 move laterally in conjunction with the lateral movement of the lower end surface of the vibration isolating rubber 33 via the lower plate 31, the wedge-shaped member 17 and the bracket 37. In other words, the inner surface electrodes 51 and 61 are displaced laterally integrally with the lower plate 31 of the vibration isolating rubber unit 18.
- the outer surface electrodes 52 and 62 move laterally in conjunction with the lateral movement of the upper end surface of the vibration isolating rubber 33 via the upper plate 32, the spring seat 19 and the bracket 38. In other words, the outer surface electrodes 52 and 62 are displaced laterally integrally with the upper plate 32 of the vibration isolating rubber unit 18.
- the mediating members 53 and 63 of the first and second lateral load fluctuation sensors 22A and 22B are made of a material different from that of the vibration-proof rubber 33. In this embodiment, it consists of the same material as the mediating member 43 of the vertical load sensor 21. That is, each of the mediating members 53 and 63 is deformed by the lateral relative movement of the outer surface electrodes 51 and 61 and the inner surface electrodes 52 and 62 sandwiching the intermediate members 53 and 63, and the outer surface electrodes 51 and 61 and the inner surface electrodes 52 and 62 are interposed. Causing a change in the electrical output (eg, voltage) from.
- the electrical output eg, voltage
- the intermediate members 53 and 63 have a deformation resistance smaller than that of the vibration-proof rubber 33.
- the deformation resistance of the mediating members 53 and 63 is 50% or less, preferably 10% or less, of the deformation resistance of the vibration isolating rubber 33.
- the spring constants of the mediating members 53 and 63 are smaller than the spring constant of the vibration isolating rubber 33.
- the spring constant of the mediating members 53 and 63 is 50% or less, preferably 10% or less of the spring constant of the vibration isolating rubber 33.
- the area of the mediating members 53 and 63 viewed from the lateral direction is smaller than the area of the vibration isolating rubber 33 viewed from the lateral direction.
- the area of the mediating members 53 and 63 is 50% or less, preferably 10% or less of the area of the vibration isolating rubber 33.
- the thickness in the lateral direction of the mediating members 53 and 63 is at least 5 times the thickness in the lateral direction of the electrodes 51, 52, 61 and 62, preferably 10 times or more.
- the computing unit 70 is connected to the vertical load variation sensor 21, the first lateral load variation sensor 22A, and the second lateral load variation sensor 22B so that they can communicate with each other by wire or wirelessly.
- the computing unit 70 receives the electrical output from the vertical load variation sensor 21 and the electrical outputs from the first and second lateral load variation sensors 22A and 22B, and is the load below the vertical direction that the wheel 7 exerts on the rail.
- a certain wheel load P and a lateral pressure Q that is a lateral load exerted on the side surface of the rail by the wheel 7 are calculated.
- the computing unit 70 calculates the wheel load P according to the following formula 1.
- P P0 + ⁇ P
- P0 is a stationary wheel weight that means a wheel weight when the carriage 1 is stationary
- ⁇ P is a fluctuation amount of the wheel weight when the vehicle travels.
- the stationary wheel weight P0 is measured by an external stationary wheel weight measuring device (not shown) before or after the vehicle travels and is input to the computing unit 70.
- the wheel load fluctuation amount ⁇ P is obtained by the following formula 2.
- ⁇ P f (V)
- V is an electrical output (for example, voltage) from the vertical load fluctuation sensor 21.
- f is a function set by obtaining in advance the correspondence between the output from the vertical load fluctuation sensor 21 and the wheel load fluctuation amount ⁇ P.
- the computing unit 70 calculates the lateral pressure Q by the following formula 3.
- Q0 means the lateral pressure when the carriage 1 is stationary, and specifically, zero is input.
- ⁇ Q is the amount of variation in lateral pressure during vehicle travel.
- the lateral pressure fluctuation amount ⁇ Q is obtained by at least one of the following formulas 4 and 5.
- V1 is an electrical output (for example, voltage) from the first lateral load variation sensor 22A
- V2 is an electrical output (for example, voltage) from the second lateral load variation sensor 22B
- f1 is a function set by obtaining in advance the correspondence between the output from the first lateral load fluctuation sensor 22A and the lateral pressure fluctuation amount ⁇ Q
- f2 is a function set by obtaining in advance the correspondence between the output from the second lateral load fluctuation sensor 22B and the lateral pressure fluctuation amount ⁇ Q.
- the computing unit 70 inputs the sensor values of the vertical load fluctuation sensor 21 and the first and second lateral load fluctuation sensors 22A and 22B detected on the same time axis during traveling of the vehicle into Equations 1 to 5, and The weight P and the lateral pressure Q are calculated, and the Q / P value (the value obtained by dividing the lateral pressure by the wheel weight) during vehicle travel is output.
- the Q / P value is used as a derailment coefficient, and it is possible to easily determine the possibility of derailment by determining whether or not the Q / P value during vehicle travel is within a predetermined allowable range. .
- the vertical load fluctuation sensor 21 is arranged in parallel with the vibration isolating rubber 29 interposed between the axle box 9 and the carriage frame 4, and between the axle box 9 and the carriage frame 4. Since the lateral load variation sensors 22A and 22B are arranged in parallel with the vibration isolating rubber 33 interposed between the intermediate member 43, the intermediate member 43 of the vertical load variation sensor 21 and the intermediate members 53 and 63 of the lateral load variation sensors 22A and 22B are In a state where the downward load from the carriage frame 4 is borne by the vibration isolating rubbers 29 and 33, the vibration isolating rubber 29 is deformed in accordance with the vertical load variation of the vibration isolating rubber 29 and the lateral load variation of the anti vibration isolating rubber 33.
- the mediating members 43, 53, and 63 of the vertical load variation sensor 21 and the lateral load variation sensors 22A and 22B can sufficiently secure a room for further deformation when the carriage 1 is stationary. Therefore, the sensitivity of the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22A and 22B can be increased, and the measurement accuracy can be improved.
- the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22A and 22B are arranged in parallel with the anti-vibration rubbers 29 and 33, the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22A and 22B can be easily applied to any cart equipped with the anti-vibration rubbers 29 and 33. be able to.
- the mediating members 43, 53, and 63 have a smaller deformation resistance than the vibration-proof rubbers 29 and 33, it is possible to suppress the elastic deformation behavior of the vibration-proof rubbers 29 and 33 from being inhibited.
- the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22A and 22B are arranged outside the vibration-proof rubbers 29 and 33, they can be easily attached to an existing cart.
- FIG. 6 is a cross-sectional view for explaining the arrangement of the vertical load variation sensor 21 according to the second embodiment.
- FIG. 7 is a cross-sectional view for explaining the arrangement of the lateral load fluctuation sensors 22A and 22B according to the second embodiment.
- symbol is attached
- the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22 ⁇ / b> A and 22 ⁇ / b> B are arranged in spaces 129 a and 133 a surrounded by vibration-proof rubbers 129 and 133.
- the first anti-vibration rubber unit 116 of the second embodiment is disposed at the same place as the first anti-vibration rubber unit 16 of the first embodiment, and the second anti-vibration rubber unit 118 of the second embodiment is the same as that of the first embodiment. It arrange
- the first anti-vibration rubber unit 116 includes an annular lower plate 27, an annular upper plate 28, and an anti-vibration rubber 129 sandwiched between the lower plate 27 and the upper plate 28.
- the lower end surface and the upper end surface of the anti-vibration rubber 129 are bonded to the lower plate 27 and the upper plate 28.
- the anti-vibration rubber 129 is formed with a concave space 129a opened on the upper surface or the lower surface, and the vertical load variation sensor 21 is accommodated in the concave space 129a.
- the lower surface electrode 41 of the vertical load variation sensor 21 is in pressure contact with a portion of the anti-vibration rubber 129 that becomes the lower surface of the concave space 129a, and the upper surface electrode 42 of the vertical load variation sensor 21 is in contact with an insulating material (for example, insulating adhesive). Agent).
- the vertical load fluctuation sensor 21 has a gap in the horizontal direction with respect to the anti-vibration rubber 129.
- the electric wire (not shown) connected to the lower surface electrode 41 and the upper surface electrode 42 is led out from the first anti-vibration rubber unit 116 and connected to the computing unit 70 (see FIG. 2).
- the second anti-vibration rubber unit 118 has an annular lower plate 31, an annular upper plate 32, and an anti-vibration rubber 133 sandwiched between the lower plate 31 and the upper plate 32.
- the lower end surface and the upper end surface of the anti-vibration rubber 133 are bonded to the lower plate 31 and the upper plate 32.
- the anti-vibration rubber 133 has a hole space 133a that opens to the upper surface and the lower surface, and the first lateral load variation sensor 22A and the second lateral load variation sensor 22B are accommodated in the hole space 133a.
- the outer surface electrodes 51 and 61 of the lateral load variation sensors 22A and 22B are respectively fixed to the side bracket portions 137A and 137B protruding upward from the lower plate 31 in the hole space 133a via an insulating material (for example, an insulating adhesive). ing.
- the side bracket portions 137 ⁇ / b> A and 137 ⁇ / b> B have a gap in the vertical direction with respect to the upper plate 32.
- the inner side surface electrodes 52 and 62 of the lateral load variation sensors 22A and 22B are fixed to the central bracket portion 138 protruding downward from the upper plate 32 in the hole space 133a via an insulating material (for example, an insulating adhesive).
- the central bracket portion 138 has a gap in the vertical direction with respect to the lower plate 31, and a gap with respect to the portion of the anti-vibration rubber 133 that becomes the side surface of the hole space 133 a.
- the electric wires (not shown) connected to the outer surface electrodes 51 and 61 and the inner surface electrodes 52 and 62 are led out from the second vibration isolating rubber unit 118 to the computing unit 70 (see FIG. 2). It is connected.
- the vertical load fluctuation sensor 21 is arranged in parallel with the anti-vibration rubber 129 interposed between the axle box 9 and the carriage frame 4, and between the axle box 9 and the carriage frame 4. Since the lateral load fluctuation sensors 22A and 22B are arranged in parallel with the vibration isolating rubber 133 interposed between the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22A and 22B, In a state where the downward load from the carriage frame 4 is borne by the vibration isolating rubbers 129 and 133, the vibration isolating rubber 129 is deformed according to the vertical load fluctuation of the anti vibration isolating rubber 129 and the lateral load fluctuation of the anti vibration isolating rubber 133. .
- the mediating members 43, 53, and 63 of the vertical load variation sensor 21 and the lateral load variation sensors 22A and 22B can sufficiently secure room for further deformation when the carriage is stationary. Therefore, the sensitivity of the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22A and 22B can be increased, and the measurement accuracy can be improved.
- the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22A and 22B are arranged in parallel with the vibration isolating rubbers 129 and 133 in the load transmission path from the carriage frame 4 to the wheels 7 (see FIG. 1). Therefore, it can be easily applied to any cart equipped with the vibration-proof rubbers 129 and 133. Further, since the vertical load fluctuation sensor 21 and the lateral load fluctuation sensors 22A and 22B are accommodated in the spaces 129a and 133a surrounded by the anti-vibration rubbers 129 and 133, the sensors 21, 22A and 22B are treated as foreign matters (for example, dust). Etc.) can be easily protected. Since other configurations are the same as those of the first embodiment described above, description thereof is omitted.
- FIG. 8 is a side view of a main part in which a part of a carriage 201 according to the third embodiment is cut.
- symbol is attached
- the bogie frame 204 of the bogie 201 of the third embodiment has a side beam 273.
- the axle box 9 is elastically connected to the side beam 273 by the connecting device 220.
- the coupling device 220 protrudes from the side beam 273 and has a pair of receiving seats 211 and 211 arranged side by side in the lateral direction, and the shaft beam 13 protruding integrally from the axle box 9 toward the receiving seats 211 and 211. And a connecting portion 214 having a rubber bush or the like (not shown) for elastically coupling the tip end portion of the shaft beam 13 to the seats 211 and 211. That is, the cart 1 of this embodiment is a shaft-beam type.
- a lower spring seat 271 is placed on the first anti-vibration rubber unit 16 from above.
- a concave portion 271 a is formed in the center portion of the lower surface of the lower spring seat 271.
- the lower spring seat 271 is positioned with respect to the axle box cover 15 in the horizontal direction by fitting the concave portion 271 a into the cylindrical portion 15 a of the bearing cover 15.
- the upper plate 28 of the first anti-vibration rubber unit 16 is also indirectly positioned with respect to the axle box cover 15 in the horizontal direction.
- the lower spring seat 271 has a support column 271b that protrudes upward from the center thereof.
- the lower spring seat 271 has an upper bracket portion 271c that protrudes outward in the horizontal direction (for example, outward in the longitudinal direction of the vehicle) from the first anti-vibration rubber unit 16 and has a horizontal lower surface.
- a lower end of a shaft spring 272 made of a coil spring is mounted as a suspension spring.
- the side beam 273 has a housing part 273 a that opens downward above the axle box 9.
- the upper spring seat 274 is positioned on the upper surface of the internal space of the housing portion 273a, and the upper spring seat 274 is placed on the upper end of the shaft spring 272. That is, a shaft spring 272 made of a coil spring is interposed between the shaft box 9 and the side beam 273 as a suspension spring.
- the upper spring seat 274 has a cylindrical portion 274a that protrudes downward.
- the cylindrical portion 274a is disposed with a gap inward in the horizontal direction from the shaft spring 272 and with a gap in the horizontal direction from the support column 271b.
- An anti-vibration rubber 275 is inserted between the cylindrical portion 274a and the column portion 271b.
- the lower surface of the upper bracket portion 271c of the lower spring seat 271 is opposed to the upper surface of the lower bracket portion 15b of the axle box cover 15 in the vertical direction.
- the vertical load variation sensor 21 is bonded to the lower surface of the upper bracket portion 271c.
- a pressure contact member 36 made of an insulating material (for example, an elastic member made of rubber or the like) is bonded to the upper surface of the lower bracket portion 15 b, and the pressure contact member 36 is in pressure contact with the lower surface of the vertical load variation sensor 21.
- a bracket 37 similar to that of the first embodiment is fixed to the lower spring seat 271.
- a bracket 38 similar to that of the first embodiment is fixed to the side beam 273.
- the first lateral load variation sensor 22A and the second lateral load variation sensor 22B are disposed between the bracket 37 and the bracket 38.
- the vertical load fluctuation sensor 21 is arranged in parallel with the vibration isolating rubber 29 in the load transmission path from the bogie frame 204 to the axle box 9, and the vertical direction of the anti-vibration rubber 29 supporting the downward load from the bogie frame 4.
- the first and second lateral load fluctuation sensors 22A and 22B are arranged in parallel with the shaft spring 272 in the load transmission path from the carriage frame 4 to the axle box 9, and support the downward load from the carriage frame 4. It follows the lateral elastic deformation of the shaft spring 272. According to such a configuration, as in the first embodiment, the measurement accuracy of wheel load and lateral pressure can be improved while being easily applied to various carts.
- FIG. 9 is a side view of an essential part in which a part of a cart according to the fourth embodiment is cut.
- FIG. 10 is a plan view for explaining the arrangement of the vertical load fluctuation sensors shown in FIG.
- FIG. 11 is a plan view for explaining the arrangement of the lateral load variation sensor shown in FIG.
- symbol is attached
- the axle box 9 is elastically connected to both ends of the horizontal beam in the vehicle width direction by a connecting device 20.
- the coupling device 20 is a pair of shaft beams 13 projecting in the longitudinal direction of the vehicle integrally from the axle box 9 toward the lateral beam, and a pair of projections projecting from the lateral beam toward the side of the shaft beam 13 and spaced apart in the lateral direction. And a connecting portion 14 that is elastically coupled to the receiving seat 11.
- the connecting portion 14 includes a cylindrical portion 71 provided at the tip of the shaft beam 13, a mandrel 72 fixed to the receiving seat 11, and a cylindrical rubber bush 73 sandwiched between the cylinder portion 71 and the mandrel 72.
- a cylindrical rubber bush 73 sandwiched between the cylinder portion 71 and the mandrel 72.
- the first anti-vibration rubber unit 216 has substantially the same configuration as the first anti-vibration rubber unit 116 of the second embodiment, but the vertical load fluctuation sensor housed in the unit 216.
- the number of 21 is different.
- the second anti-vibration rubber unit 218 has substantially the same configuration as the second anti-vibration rubber unit 118 of the second embodiment, but the number of lateral load variation sensors 22A and 22B accommodated in the unit 218 is different.
- the first anti-vibration rubber unit 216 has an internal space 129a at a point-symmetrical position with respect to the center Y in plan view. Since the vertical load fluctuation sensors 21 are accommodated in the internal spaces 129a, the two vertical load fluctuation sensors 21 are arranged point-symmetrically with respect to the center Y of the first vibration isolating rubber unit 216.
- the second anti-vibration rubber unit 218 has an internal space 133a at a point-symmetrical position with respect to the center Z in plan view.
- the sets of the lateral load fluctuation sensors 22A and 22B are accommodated in the internal spaces 113a, respectively, so that the two sets of the lateral load fluctuation sensors 22A and 22B are pointed on the basis of the center Z of the second vibration isolating rubber unit 218. They are arranged symmetrically.
- the axle box 9 circularly moves vertically and laterally about the axis X of the mandrel 72, the amount of deformation of the anti-vibration rubber of the first anti-vibration rubber unit 216 and the second anti-vibration rubber unit 218 is , Depending on the position in the units 216, 218. That is, in the first vibration isolating rubber unit 216 and the second vibration isolating rubber unit 218, the portion far from the axis X of the mandrel 72 has a larger deformation amount (displacement amount) than the portion near the axis X of the mandrel 72. Become. However, the computing unit 70 (see FIG.
- both the vertical load fluctuation sensor 22 for calculating the wheel load P and the lateral load fluctuation sensors 22A and 22B for calculating the lateral pressure Q are mounted on the carriage. Only one of them may be mounted on the carriage.
- the vertical load fluctuation sensor 22 and the lateral load fluctuation sensors 22A and 22B are arranged in parallel corresponding to the different antivibration rubbers 29 and 33, respectively. Corresponding to the vibration rubber 33) may be arranged in parallel (the second elastic body may be the same as the first elastic body).
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Abstract
Description
図1は、第1実施形態に係る鉄道車両台車1の側面図である。図1に示すように、台車1は、二次サスペンションバネとなる空気バネ2を介して車体(図示せず)を支持するボルスタ3と、ボルスタ3をヨーイング方向に相対回動自在に支持する台車枠4とを備えている。台車枠4は、車両長手方向(前後方向)の中央において横方向(車幅方向)に延びる横ばり5を有しているが、いわゆる側ばりを有していない。横ばり5の前方及び後方には、それぞれ横方向に延びる車軸6が配置され、車軸6の横方向両側には車輪7が固定されている。車軸6の横方向の両端部には、車輪7よりも横方向外側にて車軸6を回転自在に支持する軸受8が設けられ、軸受8は軸箱9に収容されている。
P=P0+ΔP
ここで、P0は、台車1が静止した状態での輪重を意味する静止輪重であり、ΔPは、車両走行時における輪重の変動量である。静止輪重P0は、車両走行前又は後に外部の静止輪重計測装置(図示せず)により計測されて演算器70に入力される。輪重変動量ΔPは、下記の数式2により求められる。
ΔP=f(V)
ここで、Vは、鉛直荷重変動センサ21からの電気的出力(例えば、電圧)である。fは、鉛直荷重変動センサ21からの出力と輪重変動量ΔPとの対応関係を予め求めておくことで設定される関数である。また、演算器70は、下記の数式3により横圧Qを算出する。
Q=Q0+ΔQ=ΔQ
ここで、Q0は、台車1が静止した状態での横圧を意味し、具体的にはゼロが入力される。ΔQは、車両走行時における横圧の変動量である。横圧変動量ΔQは、下記の数式4及び数式5の少なくとも1つにより求められる。
ΔQ=f1(V1)
[数式5]
ΔQ=f2(V2)
ここで、V1は、第1横荷重変動センサ22Aからの電気的出力(例えば、電圧)であり、V2は、第2横荷重変動センサ22Bからの電気的出力(例えば、電圧)である。f1は、第1横荷重変動センサ22Aからの出力と横圧変動量ΔQとの対応関係を予め求めておくことで設定される関数である。f2は、第2横荷重変動センサ22Bからの出力と横圧変動量ΔQとの対応関係を予め求めておくことで設定される関数である。
図6は、第2実施形態に係る鉛直荷重変動センサ21の配置を説明する断面図である。図7は、第2実施形態に係る横荷重変動センサ22A,22Bの配置を説明する断面図である。なお、第1実施形態と共通する構成については同一符号を付して説明を省略する。図6及び7に示すように、鉛直荷重変動センサ21及び横荷重変動センサ22A,22Bは、防振ゴム129,133で囲まれた空間129a,133aに配置されている。第2実施形態の第1防振ゴムユニット116は、第1実施形態の第1防振ゴムユニット16と同じ所に配置され、第2実施形態の第2防振ゴムユニット118は、第1実施形態の第2防振ゴムユニット18と同じ所に配置される。但し、第2実施形態の台車では、鉛直荷重変動センサ21及び横荷重変動センサ22A,22Bは、第1及び第2防振ゴムユニット116,118の外部には配置されていない。
図8は、第3実施形態に係る台車201の一部を断面化した要部側面図である。なお、第1実施形態と共通する構成については同一符号を付して説明を省略する。図8に示すように、第3実施形態の台車201の台車枠204は、側ばり273を有している。軸箱9は、連結装置220によって側ばり273に弾性的に連結されている。連結装置220は、側ばり273から突出して且つ横方向に間隔をあけて並んだ一対の受け座211,211と、軸箱9から一体に受け座211,211側に向けて突出した軸ばり13と、軸ばり13の先端部を受け座211,211に弾性結合するためのゴムブッシュ等(図示せず)を有する連結部214とを備えている。即ち、本実施形態の台車1は、軸ばり式である。
図9は、第4実施形態に係る台車の一部を断面化した要部側面図である。図10は、図9に示す鉛直荷重変動センサの配置を説明する平面図である。図11は、図9に示す横荷重変動センサの配置を説明する平面図である。なお、前述した実施形態と共通する構成については同一符号を付して説明を省略する。図9に示すように、軸箱9は、連結装置20によって横ばりの車幅方向の両端部に弾性的に連結されている。連結装置20は、軸箱9から一体に横ばりに向けて車両長手方向に突出した軸ばり13と、横ばりから軸ばり13側に向けて突出して且つ横方向に間隔をあけて並んだ一対の受け座11と、軸ばり13の先端部を受け座11に弾性結合する連結部14とを備えている。
4,204 台車枠
9 軸箱
21 鉛直荷重変動センサ(第1又は第2荷重変動センサ)
22A 第1横荷重変動センサ(第2又は第1荷重変動センサ)
22B 第2横荷重変動センサ(第2又は第1荷重変動センサ)
27,31 下板(下部材)
28,32 上板(上部材)
29,33,129,133 防振ゴム(第1又は第2弾性体)
41 下面電極(第1電極)
42 上面電極(第2電極)
51,61 外側面電極(第3電極)
52,62 内側面電極(第4電極)
43,53,63 媒介部材
70 演算器
100 荷重計測装置
272 軸バネ(第1又は第2弾性体)
Claims (9)
- 軸箱と台車枠との間に防振ゴム又はサスペンションバネからなる第1弾性体が介設される鉄道車両台車に用いる荷重計測装置であって、
前記第1弾性体と並列に配置され、前記台車枠からの下方荷重を支持した前記第1弾性体の鉛直方向又は横方向のいずれか一方向の弾性変形に連動して変形する第1荷重変動センサを備え、
前記第1荷重変動センサは、前記第1弾性体の前記一方向の弾性変形に連動して変形することで電気的出力に変化を生じさせる、鉄道車両台車用の荷重計測装置。 - 前記第1荷重変動センサは、
前記第1弾性体の下端の前記一方向の動きに連動して前記一方向に動く第1電極と、
前記第1弾性体の上端の前記一方向の動きに連動して前記一方向に動く第2電極と、
前記第1電極及び前記第2電極により前記一方向に挟まれ、前記第1電極及び前記第2電極の前記一方向の相対移動により変形して前記第1電極及び前記第2電極からの電気的出力に変化を生じさせる第1媒介部材と、を有している、請求項1に記載の鉄道車両台車用の荷重計測装置。 - 前記第1弾性体は、防振ゴムであり、
前記第1電極は、前記防振ゴムの下面に取り付けられた下部材と一体に前記一方向に移動し、
前記第2電極は、前記防振ゴムの上面に取り付けられた上部材と一体に前記一方向に移動する、請求項2に記載の鉄道車両台車用の荷重計測装置。 - 前記第1荷重変動センサは、前記第1弾性体よりも変形抵抗が小さい、請求項1乃至3のいずれか1項に記載の鉄道車両台車用の荷重変動計測装置。
- 前記第1荷重変動センサは、前記第1弾性体の外部に配置される、請求項1乃至4のいずれか1項に記載の鉄道車両台車用の荷重計測装置。
- 前記第1荷重変動センサは、前記第1弾性体で囲まれた空間に配置される、請求項1乃至4のいずれか1項に記載の鉄道車両台車用の荷重計測装置。
- 前記軸箱と前記台車枠との間には、防振ゴム又はサスペンションバネからなる第2弾性体が介設されており、
前記第2弾性体と並列に配置され、前記台車枠からの下方荷重を支持した前記第2弾性体の鉛直方向又は横方向のいずれか他方向の弾性変形に連動して変形する第2荷重変動センサを更に備え、
前記第2荷重変動センサは、前記第2弾性体の前記他方向の弾性変形に連動して変形することで電気的出力に変化を生じさせる、請求項1乃至6のいずれか1項に記載の鉄道車両台車用の荷重計測装置。 - 前記第2荷重変動センサは、
前記第2弾性体の下端の前記他方向の動きに連動して前記他方向に動く第3電極と、
前記第2弾性体の上端の前記他方向の動きに連動して前記他方向に動く第4電極と、
前記第3電極及び前記第4電極により前記他方向に挟まれ、前記第3電極及び前記第4電極の前記他方向の相対移動により変形して前記第3電極及び前記第4電極からの電気的出力に変化を生じさせる第2媒介部材と、を有している、請求項7に記載の鉄道車両台車用の荷重計測装置。 - 前記第1荷重変動センサからの出力と前記第2荷重変動センサからの出力とが入力される演算器を更に備え、
前記演算器は、外部から入力された静止輪重と、車両走行中における前記第1荷重変動センサ又は前記第2荷重変動センサの鉛直方向の荷重変動に関する出力とから、車両走行中の輪重を算出し、かつ、車両走行中における前記第2荷重変動センサ又は前記第1荷重変動センサの横方向の荷重変動に関する出力から、車両走行中の車輪の横圧を算出する、請求項7又は8に記載の鉄道車両台車用の荷重計測装置。
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US15/108,426 US10422685B2 (en) | 2013-12-25 | 2014-12-22 | Load measuring device for railcar bogie |
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Cited By (4)
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JP2016172462A (ja) * | 2015-03-16 | 2016-09-29 | 公益財団法人鉄道総合技術研究所 | 防振装置 |
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WO2018139251A1 (ja) * | 2017-01-30 | 2018-08-02 | 川崎重工業株式会社 | 鉄道車両の軸箱支持装置 |
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US20160320229A1 (en) | 2016-11-03 |
JPWO2015098091A1 (ja) | 2017-03-23 |
US10422685B2 (en) | 2019-09-24 |
JP6140300B2 (ja) | 2017-05-31 |
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