[go: up one dir, main page]

WO2018133880A1 - Bogie de wagon ferroviaire express - Google Patents

Bogie de wagon ferroviaire express Download PDF

Info

Publication number
WO2018133880A1
WO2018133880A1 PCT/CN2018/075133 CN2018075133W WO2018133880A1 WO 2018133880 A1 WO2018133880 A1 WO 2018133880A1 CN 2018075133 W CN2018075133 W CN 2018075133W WO 2018133880 A1 WO2018133880 A1 WO 2018133880A1
Authority
WO
WIPO (PCT)
Prior art keywords
pair
rubber
bolster
positioning
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/075133
Other languages
English (en)
Chinese (zh)
Inventor
徐勇
刘凤伟
姜瑞金
王宝磊
肖光毅
李梓铭
张良威
刘爱文
黎巧能
江荷燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Yangtze Co Ltd
Original Assignee
CRRC Yangtze Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201720103089.3U external-priority patent/CN206456374U/zh
Priority claimed from CN201710058580.3A external-priority patent/CN106809233B/zh
Application filed by CRRC Yangtze Co Ltd filed Critical CRRC Yangtze Co Ltd
Publication of WO2018133880A1 publication Critical patent/WO2018133880A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • B61F5/50—Other details
    • B61F5/52—Bogie frames

Definitions

  • the invention belongs to the technical field of railway vehicle trucks, and particularly relates to a railway express freight car bogie.
  • Heavy-duty and fast-speed is the development direction of railway wagons. According to the development of domestic railway freight transport and the requirements of railway technical policy, it is necessary to develop a fast railway wagon with a running speed of 140km/h ⁇ 160km/h and a axle load of not more than 18t.
  • the fast freight car bogie is an important part of the fast railway wagon, which directly affects the running speed and load capacity of the vehicle.
  • the frame type fast freight car bogie mainly has a rocking table structure, a linole damper, a positioning fast truck bogie, a non-shaking table bolster, a rubber pile guide column type, a fast freight car bogie, and a non-shaking table bolster, a rubber spring positioning.
  • Fast truck bogies but no matter which bogie, axle box positioning structure and bolster arrangement have no mature experience, there are limitations in high-speed running stability and bogie maintenance.
  • China utility model patents (publication number CN2517641, publication date 2002.10.23) and Chinese utility model patents (publication number CN 200945865, publication date 2007.09.12) respectively disclose a high-speed freight car bogie and a fast railway freight car bogie.
  • Both bogies adopt the structural model of the overall frame and bolster.
  • the axle box suspension system uses a combination of steel round springs, rubber piles, metal liquid springs and hydraulic shock absorbers.
  • the second suspension system uses rubber piles.
  • the structure of the bolster is a unit brake system with two brake discs per axis.
  • the axle box positioning structure adopts rubber pile guide column positioning or rubber spring positioning. Because of the positioning structure, the rubber pile guide column and rubber spring are used in vertical and horizontal directions. The stiffness matching in the three directions is difficult, and the three-way stiffness changes greatly after long-term operation of the vehicle, which reduces the stability of the high-speed operation of the bogie. At present, it has been gradually eliminated on the passenger car bogie, and there is a risk in the use of the fast truck bogie.
  • the Chinese utility model patent discloses a fast railway freight car bogie, which adopts a structural structure of a whole frame and a bolster, and the bolster realizes the vertical direction through the suspension rod system and the frame composition. connection.
  • the bogie adopts a boom-type rocking table structure, and the bolster is located at the lower part of the frame, which is not conducive to the lower boundary of the bogie.
  • the risk of the bolster dropping the track is large, and the linole damper used is a kind of friction.
  • the damper makes the longitudinal positioning rigidity of the bogie too large, the curve passing performance is not excellent, and the use of the wear parts increases the maintenance cost.
  • the object of the present invention is to provide a bogie suitable for railway express delivery trucks that meets the deficiencies of the above-mentioned technologies and has a running speed of 140 km/h to 160 km/h, an axle weight of not more than 18 t, and high-speed running performance, and has low maintenance cost. .
  • the railway express freight car bogie designed by the invention comprises a frame, four sets of arm-type axle box positioning devices, two sets of wheel sets, a bolster and a basic braking device;
  • the frame comprises a pair of double web box-shaped side beams and a pair of round steel tube-shaped beams, the two ends of which are respectively inserted into the side beams double webs of the pair of side beams, and the two side beams of the frame
  • the four-rotor axle box positioning device is located on the two sets of wheel sets, and a pair of beams are provided with a pair of brake hangers and a three-way mount;
  • the bolster includes a bolster upper cover, a bolster lower cover, a bolster web, and a pair of side bearing boxes disposed on both sides of the bolster upper cover;
  • the arm-type axle box positioning device comprises an axle box body formed by enclosing the positioning arm and the clamping hoop, a wheel-pair bearing disposed in the cavity of the axle box body, and an axle box installed at an outer end of the cavity of the axle box body
  • An end cap an anti-skid adapter provided at one end of the axle housing, an axle box elastic suspension system disposed between the top deck of the positioning arm and a front end of the frame, and a frame end on one side of the axle housing a vertical hydraulic damper between the end of the rotating end of the positioning arm;
  • the frame further includes a pair of curved longitudinal beams including an arcuate longitudinal beam upper cover, an arcuate longitudinal beam lower cover, and a curved curved longitudinal beam upper cover and a curved longitudinal beam lower cover
  • the curved longitudinal beam single web of the plate, the curved longitudinal beam upper cover plate and the curved longitudinal beam lower cover both extend outwardly with end ribs welded on the beam;
  • the middle of the pair of side beams is a downwardly concave U-shaped cavity, the bottom plane of the U-shaped cavity is welded with a secondary rubber pile mounting platform;
  • the middle side of the curved longitudinal beam upper cover of a pair of curved longitudinal beams is welded to the second-line rubber pile installation
  • a pair of curved longitudinal beams of curved longitudinal beams are connected to the side webs by side ribs and side girders;
  • the bolster further includes a pair of two-series rubber pile mounts at both ends of the damper web.
  • the upper surface of the pair of second rubber pile mounts is in contact with the lower surface of the bolster upper cover, and the pair of second rubber piles
  • the end surface of the mounting seat web of the mounting seat is in contact with the two ends of the damper web, and the lower surface end surface of the pair of second rubber pile mounting seat faces the two ends of the bolster lower cover;
  • the front end portion of the pair of second rubber pile mounting seats a secondary rubber pile mounting hole penetrating vertically through the front end portion, and a rear end portion of the pair of second rubber pile mounts is obliquely symmetrically distributed with respect to the bolster;
  • the upper bolster cover is mounted opposite the second rubber pile a positioning hole is disposed at a position of the hole, and a limiting ring sleeve is disposed in the positioning hole;
  • the bottom of the second rubber pile is fixed on the second rubber pile installation platform by bolts, and the top of the second rubber pile is inserted into the installation hole of the second rubber pile until the convex umbilicus at the top of the second rubber pile passes through the positioning hole and is limited to the limit ring.
  • the first lateral hydraulic damper mount is disposed at the outer side ends of the two curved longitudinal beam single webs, and the second lateral hydraulic damper mount is welded on both sides of the bolster web, two second The transverse hydraulic damper mount is symmetrically distributed with respect to the yoke web, and the first lateral hydraulic damper mount on the two curved longitudinal beam single webs and the second lateral surface on both sides of the bolster web
  • a hydraulic shock absorber is disposed between the hydraulic shock absorber mounts;
  • One end of the two beams is staggered to extend a pair of side beams of the side beam double webs, and one end of the beam extending from the side beams of the double webs is provided with a first traction rod seat, and the two first traction rod seats are opposite to the frame An oblique diagonal arrangement; a second traction rod seat is welded to the lower surface of the rear end portion of the pair of second rubber pile mounts; a first traction rod base at both ends of the pair of beams and a rear end portion of the pair of second rubber pile mounts A traction rod device is disposed between the second traction rod seats;
  • a shaft box spring mounting cylinder is installed between the side beam upper cover plate of the pair of side beams and the side beam lower cover plate and at both ends of the double side webs of the side beam, and the axle box spring is located on the side beam lower cover plate
  • a through hole communicating with the axle box spring mounting cylinder is opened directly below the mounting cylinder;
  • a pivot arm seat is disposed at a bottom of the pair of side beams and at both ends of the U-shaped cavity, and a mounting cavity is disposed on the rotating arm seat;
  • the box elastic suspension system is built in the axle box spring mounting cylinder, and the fixed end of the positioning arm is connected with the installation cavity of the arm seat through the elastic positioning node;
  • the end surface of each axle box spring mounting cylinder is provided with a vertical hydraulic shock absorber Mounting seat, the vertical hydraulic damper is fixedly mounted on the vertical hydraulic damper mount;
  • the axle box elastic suspension system comprises an annular rubber cushion disposed on the bottom surface of the platform, an inner steel spring and an outer steel spring pressed in parallel on the annular rubber cushion, and a series of rubber springs lining the inner steel spring. And the top of the series of rubber springs is located on the upper end faces of the inner steel spring and the outer steel spring, and the bottom of the series of rubber springs is disposed between the circular hole in the middle of the annular rubber cushion and the bottom surface of the cap through the inner steel spring .
  • the secondary rubber pile mounting platform and the side beam upper cover are connected by a splice weld to form a whole; the top plate of the transfer arm seat and the side girder lower cover are connected by a splice weld. Forming a whole; a weighing valve mounting seat is mounted on either side of the side beam upper cover of the pair of side beams and above the axle box spring mounting cylinder.
  • a height of a rear end portion of the pair of secondary rubber pile mounts is smaller than a height of the front end portion, and a circular arc transition between the front end portion and the rear end portion.
  • the bolster cover comprises a front cover, a rear cover and a downwardly concave concave cover, and the two ends of the concave cover are respectively associated with the front cover and the rear cover
  • the butt welding is integrally formed; a reinforcing rib is welded between the two sides of the lower surface of the concave cover and the bilge web, and the bottom surface of the concave cover is welded with a core plate;
  • the upper end surface of the second rubber pile mounting hole of the rubber pile mount is provided with a secondary rubber pile pad welded to the lower surface of the upper cover of the bolster, and the second rubber blanket plate is provided with the positioning hole Corresponding and communicating pad passage holes;
  • the second traction rod seat is welded to the lower surface of the rear end portion of the secondary rubber pile mount by the traction rod seat bottom plate.
  • the series of rubber springs comprises an inverted T-shaped cone column located at the center of the inner steel spring, a laminated rubber layer integrally formed by multi-layer metal foil and multi-layer rubber sheets, and a rubber layer in a stacking rubber a rigid platform on the outer side of the layer, the top of the rigid platform is located at an upper end surface of the inner steel spring and the outer steel spring, and the bottom of the inverted T-shaped cone is inserted into the intermediate through hole of the laminated rubber layer until the annular rubber is disposed Between the circular hole in the middle of the cushion and the bottom surface of the platform.
  • the elastic positioning node comprises two elastic positioning sleeves enclosed in the rotating end shaft holes of the positioning arm, and two rigid positioning positions of the inner liner in the elastic cavity formed by the two elastic positioning sleeves a sleeve and a positioning bolt;
  • the elastic positioning node is formed in a mounting cavity of the arm seat, and the positioning bolt sequentially passes through a fixing hole of the hanging plate of the arm seat, an elastic cavity, and two
  • the rigid positioning sleeve encloses the formed positioning cavity and the fixing hole through the hanging plate on the other side of the arm seat and is fixed by a nut, and one end of the two rigid positioning sleeves extends to the middle of the elastic cavity a portion and the other end extend into a fixing hole of the hanging plate of the other side of the arm seat;
  • the fixing hole of the hanging plate is a fixing hole formed by the upper hanging plate and the lower card plate connected to the frame, and
  • the lower card board is fixedly connected to the upper hanging plate from the bottom up by bolts.
  • the positioning rotating arm and the seal of the clamping hoop and the bearing rear stop are labyrinth seal structures; the middle portion of the clamping hoop is provided with an infrared shaft temperature detecting hole, and the infrared shaft temperature detecting hole A rubber boot is lined with the wheelset bearing.
  • the positioning arm end surface is provided with a lifting shoulder
  • the vertical hydraulic damper mounting seat is provided with a wheel pair lifting corresponding to the lifting shoulder
  • the axle box spring is installed
  • the outer peripheral wall of the cylinder is provided with a stop for the limit wheel pair lifting.
  • both ends of the curved longitudinal beam upper cover are provided with a longitudinal stop seat, and a first lateral stop seat is disposed at a middle of the outer side of the curved longitudinal beam single web; A pair of second lateral stop seats are welded to both ends of the cover plate.
  • axle housing is provided with an axle box annular groove at a mounting surface of the anti-skid adapter, and the anti-skid adapter is disposed at a corresponding position with the axle housing.
  • axle box annular groove at a mounting surface of the anti-skid adapter
  • anti-skid adapter is disposed at a corresponding position with the axle housing.
  • non-slipper adapter seat ring that cooperates with the annular groove of the axle housing; the axle housing annular groove and the mounting surface of the anti-skid adapter socket are lined with rubber washers.
  • the present invention has the following advantages:
  • the U-shaped cavity in the middle of the frame side beam is provided with a secondary rubber pile installation platform to provide installation space for the bolster and the second-line rubber pile, ensuring that the interface size of the express freight car bogie and the car body can meet the needs of the existing railway wagons.
  • two side rib joints are arranged between the side beam and the curved longitudinal beam, and the middle portion of the curved longitudinal beam upper cover plate is connected to the side surface of the side beam two-series rubber pile mounting platform to ensure the first transverse end of the curved longitudinal beam
  • the lateral load received by the block can be transmitted to the side sill, reducing the stress of the welded joint between the curved longitudinal beam and the beam, and improving the bearing capacity of the frame to the lateral load
  • four of the two side sills are mounted on the spring
  • There is a direct weighing valve mount to accommodate the installation of the weighing valve
  • the first traction rod seat is respectively mounted on the part of the two beams extending from the side beam, and the end of the beam is connected by a ring weld
  • a traction rod seat is arranged diagonally opposite to the frame to accommodate the installation of the traction rod of the bolster type structure type bogie;
  • the bolster is made of a forged second-stage rubber pile mount instead of the welded structure whose actual stress exceeds the allowable stress, and the strength of the part is increased. Since the original welded part has been replaced by the base metal, the allowable stress is also increased to the level of the base metal. Although the stress at this place is not lowered, since the allowable stress of the part has been increased, the structure is not changed. On the premise that the strength of the bolster is increased without increasing the weight or increasing the strength level of the sheet; the height of the rear end portion of the second-stage rubber pile mount is smaller than the height of the front end portion, that is, the front end portion and the rear end portion.
  • variable cross-section design makes more parts of the second-line rubber pile exposed, so as to improve the heat dissipation speed of the second-line rubber pile, thereby improving the heat dissipation performance of the second-line rubber pile;
  • the use of the central concave bolster is beneficial to reduce The height of the heart plate to the rail surface, that is, the center of gravity of the vehicle is lowered;
  • the axle box elastic suspension system used effectively reduces the high-frequency impact of the vehicle during high-speed operation. Due to the addition of a series of rubber springs with load-bearing and vibration-reducing functions, the vertical direction of the bogies of heavy-duty conditions is increased. Stiffness, the variable stiffness of the axle box of the frame type bogie is realized; the vertical hydraulic damper with secondary vibration reduction function is used to realize the frame type steering with a series of rubber springs involved in the working condition of the bogie.
  • the damping force of the axle box elastic suspension system; the infrared shaft temperature detecting hole is arranged in the middle part of the clamping hoop, which solves the problem that the existing axle frame of the truck frame bogie can not adopt the infrared temperature measuring technology when the line is running It can detect the bearing temperature of the train under running condition in real time, avoid the hot shaft fault caused by the leak detection, and ensure the safety of railway transportation; since the middle part of the clamp hoop is provided with the infrared shaft temperature detecting hole, the infrared shaft temperature detecting hole is A rubber dust jacket is arranged between the wheel and the bearing to effectively prevent dust from penetrating from the middle portion of the clamp; the positioning arm and the clamp are respectively sealed with the rear of the bearing. Gong seal structure effectively improve the dust prevention oil capacity axis of the housing; Lifting gear wheel Lifting shoulder cooperating with the axis of the housing so as to prevent separation of the frame when the frame type bogie is lifted;
  • the processing difficulty of the axle box body and the anti-skid device adapter is effectively reduced without changing the good matching between the mechanical anti-skid device and the axle box body.
  • the machining process of the positioning arm is improved; at the same time, the rubber washer is lined on the mounting surface of the annular groove of the axle box body and the anti-skid adapter socket to ensure the tightness of the anti-skid adapter and the axle housing.
  • the connection is effective to prevent the infiltration of dust and pollutants, and greatly improve the dustproof and oil proof ability of the axle box.
  • FIG. 1 is a top plan view showing the structure of a bogie of a railway express freight car of the present invention
  • Figure 2 is a front elevational view of Figure 1;
  • Figure 3 is a schematic view of the structure of Figure 1;
  • Figure 4 is a schematic view showing the structure of the side beam of Figure 3;
  • Figure 5 is a partial structural view of Figure 4.
  • Figure 6 is a schematic view showing the structure of the beam of Figure 3;
  • Figure 7 is a schematic view showing the structure of the curved longitudinal beam of Figure 3;
  • Figure 8 is a schematic perspective view of the bolster of Figure 1;
  • Figure 9 is a perspective view showing the three-dimensional structure of the bottom view of Figure 8.
  • Figure 10 is a schematic view showing the installation structure of the secondary rubber pile and the second rubber pile mount of Figure 8;
  • Figure 11 is a partial cross-sectional view showing the overall installation of the three-way structure of the swing arm type axle box positioning device of Figure 2;
  • Figure 12 is a cross-sectional view showing the axle box elastic suspension system of Figure 11;
  • Figure 13 is a schematic structural view of a series of rubber springs of Figure 12;
  • Figure 14 is a schematic view showing the structure of the elastic positioning node of Figure 11;
  • Figure 15 is a schematic view of A-A of Figure 14;
  • Figure 16 is a schematic view showing the sealing structure of the cavity of the axle housing of Figure 11;
  • Figure 17 is a perspective view of the axle housing of Figure 11;
  • Figure 18 is a schematic view showing the assembly of the axle housing and the anti-skid adapter of Figure 17;
  • Figure 19 is a partially enlarged schematic view of the portion M in Figure 18.
  • Rotary arm axle box positioning device 100 axle housing 110 (in which: axle housing annular recess 110a), axle housing end cover 111, cavity 112, wheelset bearing 113 (where: bearing rear gear 113a), rubber protection Dust cover 114, positioning arm 120, platform 121 (including: bottom surface 121a), lifting shoulder 122, shaft hole 123, elastic positioning node composition 130, positioning bolt 131, rigid positioning sleeve 132, elastic positioning sleeve 133, elasticity Cavity 134, positioning cavity 135, labyrinth sealing structure 140, axle box elastic suspension system 150, rubber cushion 151 (where: middle circular hole 151a), inner steel spring 152, outer steel spring 153, a series of rubber spring 154 ( Wherein: inverted T-shaped tapered column 154a, metal foil 154b, rubber sheet 154c, laminated rubber layer 154d, rigid bearing platform 154e, intermediate through hole 154f), clamping hoop 160, infrared shaft temperature detecting hole 161, vertical hydraulic pressure reduction The vibrator 170,
  • the railway express freight car bogie shown in FIG. 1 and FIG. 2 includes a frame 200, four sets of swing arm axle box positioning devices 100, two sets of wheel sets 500, a bolster 300 and a basic brake device 600. .
  • the frame 200 includes a pair of side frame members 240 of a double web box type structure, a pair of cross members 250 of a circular steel tube type structure, and a pair of curved longitudinal beams 280.
  • the side sill 240 includes a side sill double web 241, a side sill upper cover 242, and a side sill lower cover 243.
  • the middle portion of the side beam 240 is a downwardly concave U-shaped cavity 244, and the bottom plane 244a of the U-shaped cavity 244 is welded with a secondary rubber pile mounting platform 245, and the secondary rubber pile mounting platform 245 and the side beam are
  • the cover plate 242 is connected by a splice weld to form a whole;
  • the second-series rubber pile mounting platform 245 provides installation space for the bolster and the second-line rubber pile to accommodate the installation of the second-line rubber pile and the bolster, and to ensure the express freight car bogie
  • the interface size with the car body can meet the requirements of the existing railway wagons.
  • an axle box spring mounting cylinder 220 is mounted between the side sill upper cover 242 of the pair of side sills 240 and the side sill lower cover 243 and at both ends of the side sill double web 241, and the axle box spring is installed.
  • the outer peripheral wall of the cylinder 220 is provided with a stop 221 for lifting the pair of wheel sets, and the side beam lower cover 243 is open at a position directly below the axle box spring mounting cylinder 220 and communicates with the axle box spring mounting cylinder 220.
  • a hole 243a as shown in FIG.
  • a weighing valve mount 290 is mounted above any one of the four axle box spring mounting cylinders 220 to accommodate the installation of the weighing valve; a pair of side beams 240 At the bottom and at the outer ends of both ends of the U-shaped cavity 244, a pivot arm seat 210 is disposed.
  • the top plate 216 of the arm rest 210 and the side beam lower cover 243 are connected by a splice weld to form a whole body, thereby avoiding the weld bead
  • the arm seat 210 is provided with a mounting cavity 215 for mounting the elastic positioning node on the positioning arm; at the same time, the end faces of each axle box spring mounting cylinder 220 are provided with vertical hydraulic pressure reduction.
  • the vertical hydraulic damper mount 171 is an integral forged part, and the base 171a of the vertical hydraulic damper mount 171 is opened with a groove, and the base 171a peripheral groove and the axle box spring mounting cylinder 220 are opened.
  • the side beam lower cover 243 is connected by a lap weld.
  • Two ends of a pair of round steel tube-shaped beams 250 are respectively inserted into the side beam double webs 241 of the pair of side beams 240, and the beam 250 and the side beam double webs 241 are connected by a ring-shaped weld, as shown in FIG.
  • One end of the two beams 250 is staggered to protrude from the side beam double webs 241 of the pair of side beams 240, and the bottom end of the cross member 250 of the side beam double webs 241 is provided with a first traction rod seat 251, the first traction rod
  • the seat 251 is connected to the beam 250 by a ring-shaped weld, that is, one first traction rod holder 251 is at the bottom of one end of one beam 250, and the other first traction rod holder 251 is at the bottom of the other end of the other beam 250, so that two A traction rod seat 251 is not on the same side and is arranged diagonally opposite to the frame, and is adapted to the installation of the traction rod of the bolster type structure type bogie; in addition, a pair of beam 250 is provided with a pair of brake hangers 260 and one The tee mount 270, the brake hanger 260 and the tee mount 270 are each connected to the middle of the beam 250 by a lap wel
  • a pair of curved longitudinal beams 280 are disposed between the pair of beams 250.
  • the curved longitudinal beams 280 include curved longitudinal beam upper cover plates 281, curved longitudinal beam lower cover plates 282, and curved curved longitudinal beams.
  • the longitudinal end of the curved longitudinal beam upper cover 281 is provided with a longitudinal stop seat 286, which is curved longitudinally.
  • a first lateral stop seat 287 is disposed at a middle portion of the outer side surface of the beam single web 283, and a first lateral hydraulic damper mount 288 is disposed at an outer side end of the curved longitudinal beam single web 283.
  • Both ends of the curved longitudinal beam upper cover 281 and the curved longitudinal beam lower cover 282 extend outwardly with end ribs 284 welded to the beam 250 such that the ends of the pair of curved longitudinal beams 280 and the beam 250 welded, the end rib 284 is in the shape of a dovetail; the middle side of the curved longitudinal beam upper cover 281 of the pair of curved longitudinal beams 280 is welded on the side of the secondary rubber pile mounting platform 245, and at the same time, The curved longitudinal beam single web 283 of the curved longitudinal beam 280 is joined to the side beam double web 241 by two side ribs 285 such that the sides of the curved longitudinal beam 280 are welded to the sides of the side members 240; The lateral load received by the longitudinal beam 280 of the first lateral stop seat 287 can be transmitted to the side members 240, reducing the stress associated with the welded joints of the curved longitudinal beams 280 and the beam 250, and improving the frame's ability to withstand lateral loads.
  • the frame solves the problem that the prior art fast truck steering frame can not be adapted to the installation of the bolster, the second suspension device, the traction rod and the direct weighing valve in the form of the bolster structure bogie, and the curved longitudinal beam and the beam
  • the weld is subject to problems such as excessive stress reduction.
  • the bolster 300 includes a bolster cover 310, a bolster cover 320, a bolster web 330, a pair of side boxes 340 disposed on both sides of the bolster cover 310, and a damper web as shown in FIG.
  • the bolster is a middle lower box type beam structure, that is, the bolster upper cover 310 includes a front cover 313, a rear cover 314, and a downwardly concave concave cover 315, the front cover 313 and The end of the rear cover 314 is arranged obliquely symmetrically with respect to the bolster, and the bolster in the middle is used to reduce the height of the core to the rail surface, that is, to reduce the center of gravity of the vehicle.
  • the two ends of the concave cover plate 315 are respectively formed integrally with the front cover plate 313 and the rear cover plate 314.
  • the front cover plate 313 and the rear cover plate 314 are thick at both ends, and the concave cover plate 315 is thinly formed.
  • a variable cross-section design is adopted at the splice weld to ensure a natural transition of the wall thickness, and a reinforcing rib 315a is welded between the two sides of the lower surface of the concave cover 315 and the ram web 330 to increase the rigidity of the entire bolster;
  • the bottom surface 315b of the concave cover plate 315 is welded to the core plate pad 350 by circumferential welding or plug welding to ensure the accuracy of the installation of the lower core plate components.
  • the secondary rubber pile mount 360 is a forged piece, and the upper surface 361 of the pair of second rubber pile mounts 360 is in contact with the lower surface of the bolster upper cover 310, and the pair of second rubber pile mounts 360
  • the end surface of the mounting web 362 is in contact with both ends of the ram web 330, and the end surface of the lower surface 363 of the pair of second rubber pile mounts 360 is in contact with both ends of the bolster lower cover 320.
  • the upper surface 361 of the second-stage rubber pile mount 360 and the lower surface of one end of the bolster cover 310 are surface-welded, and the end surface of the mounting web 362 of the second-type rubber pile mount 360 and the end surface of the ram web 330 Butt welding, the lower surface 363 end surface of the second rubber pile mount 360 is facing the end of the bolster lower cover 320; the upper surface 361 of the second secondary rubber pile mount 360 and the bolster cover 310 The lower end of the other end faces the welding.
  • the end surface of the mounting web 362 of the second rubber pile mount 360 is butt welded to the other end surface of the ram web 330.
  • the lower surface 363 end of the second rubber pile mount 360 The other end surface of the bolster cover 320 is butt welded; the lower surface 363 of the second rubber pile mount 360 is butt welded to the bolster cover 320 to form a unitary body, and the mount of the second rubber pile mount 360
  • the web 362 is butt welded to the bolster web 330 to form a unitary body.
  • the secondary rubber pile mount 360 using the forging is used to replace the welded structure in which the actual stress exceeds the allowable stress, and the strength of the portion is improved. Since the original welded part has been replaced by the base metal, the allowable stress is also increased to the level of the base metal. Although the stress at this place is not lowered, since the allowable stress of the part has been increased, the structure is not changed. Under the premise, the strength of the bolster is improved without increasing the weight or increasing the strength level of the sheet.
  • the front end portion 364 of the pair of secondary rubber pile mounts 360 is provided with a second rubber pile mounting hole 365 vertically penetrating the front end portion 364, and the bolster upper cover 310 is facing the second rubber pile.
  • a positioning hole 311 passing through the umbilicus 410 of the secondary rubber pile 400 is disposed at a position of the mounting hole 365.
  • the positioning hole 311 is provided with a limiting ring sleeve 312 for limiting the position of the umbilicus 410.
  • the second series rubber packing hole is installed.
  • the upper end surface of the 365 is provided with a secondary rubber pile pad 367 which is welded to the lower surface of the bolster cover 310 by circumferential welding or plug welding, and the second rubber pile pad 367 is provided with a pad corresponding to the positioning hole 311 and connected thereto.
  • the plate through hole 367a and the second rubber pile pad 367 are used to ensure the accuracy of the installation of the secondary rubber pile; in this embodiment, two positioning holes 311 are provided corresponding to the two convex umbilicus 410 of the second rubber pile.
  • the rear end portion 366 of the pair of secondary rubber pile mounts 360 is also obliquely symmetrically distributed with respect to the bolster, that is, the rear end portion 366 is welded to the end portion of the bolster upper cover 310 which is obliquely symmetrically arranged, and a pair The rear end portion 366 of the secondary rubber pile mount 360 is welded with a second traction rod holder 370 which is welded to the lower surface of the rear end portion 366 of the secondary rubber pile mount 360 by the traction rod seat bottom plate 371.
  • the weld bead of the lower surface of the traction rod seat bottom plate 371 and the rear end portion 366 is a circumferential weld seam, and a large plug welding hole is provided, thereby improving the connection strength of the traction rod holder 370.
  • the bottom of the secondary rubber pile 400 is fixed to the secondary rubber pile mounting platform 245 by bolts, and the top of the second rubber pile 400 is inserted into the secondary rubber pile mounting hole 365 until the top of the secondary rubber pile 400 is convex.
  • the umbilicus 410 is positioned within the limit collar 312 through the locating aperture 311 such that the bolster 300 is positioned above the frame 200.
  • the secondary rubber pile mount 360 is generally designed in the shape of a sleeve, but this causes the secondary rubber pile 400 to be difficult to dissipate heat.
  • the height of the rear end portion 366 of the second-stage rubber pile mount 360 in this embodiment is smaller than the height of the front end portion 364, and the front end portion 364 and the rear end portion 366 have a variable cross-sectional design, that is, the front end portion 364 and the rear end portion 366.
  • the arc transition is used to expose more parts of the second-line rubber pile to improve the heat dissipation speed of the second-line rubber pile, thereby improving the heat dissipation performance of the second-line rubber pile.
  • the side bearing box 340 is formed by welding two U-shaped plates 341, and the bottom of the side bearing box 340 is welded to the bolster cover plate 310 by circumferential welding or plug welding through the side bearing box pad 342.
  • the bottom bracket rib 343 is welded between the outer surface of the horizontal plate 341a of each U-shaped plate 341 and the bolster upper cover 310 to increase the accuracy of the entire bolster.
  • the two sides of the bolster web 330 are welded with a second lateral hydraulic damper mount 380, and the two second lateral hydraulic damper mounts 380 are obliquely symmetrically distributed with respect to the yoke web 330;
  • a pair of second lateral stop seats 390 are welded to both ends of the bolster lower cover 320, that is, one second lateral stop seat 390 is welded to one end of the bolster lower cover 320, and the other second lateral stop seat 390 is welded. The other end of the bolster lower cover 320.
  • the lower end of the second series rubber pile 400 is seated on the frame 200, the upper end is installed in the second series rubber pile mount 360 at the end of the bolster 300, and the first transverse hydraulic shock absorber is mounted on the two curved longitudinal beam single webs 283.
  • a lateral hydraulic damper 700 is disposed between the seat 288 and the second lateral hydraulic damper mount 380 on both sides of the bolster web 330, and the first traction rod seat 251 and the pair of two ends of the pair of beams 250 are disposed.
  • a traction rod device 800 is disposed between the second traction rod holders 370 of the rear end portion 366 of the rubber pile mount 360 such that the frame 200 and the bolster 300 pass through the secondary rubber pile 400, the lateral hydraulic shock absorber 700, and the traction rod. Device 800 is connected.
  • the arm frame box positioning device shown in FIG. 11 includes an axle box body 110, a positioning arm 120, an elastic positioning node assembly 130, a frame 200, an axle box elastic suspension system 150, a clamping hoop 160, and an anti-slip device for mounting.
  • the axle housing 110 is formed by the positioning of the positioning arm 120 and the clamping ferrule 160 and is fixed by bolts.
  • the wheel housing 112 of the axle housing 110 is provided with a wheel bearing 113, and the axle housing 110 is empty.
  • An axle box end cover 111 is mounted on the outer end of the cavity 112, and an anti-skid device adapter 180 is disposed at one end of the axle housing 110.
  • the upper top surface of the rotating end of the positioning arm 120 is provided with a platform 121.
  • the axle box elastic suspension system 150 is disposed between the platform 121 and the front end of the frame 200, that is, the axle box elastic suspension system 150 is built in the axle box spring at the end of the frame 200.
  • the mounting cylinder 220, the lower bottom surface of the axle box elastic suspension system 150 abuts against the platform 121; the vertical hydraulic damper 170 is disposed at the end of the frame 200 at the side of the axle housing 110 and the rotating end of the positioning arm 120.
  • the vertical hydraulic damper 170 is fixedly mounted on the vertical hydraulic damper mount 171 of the end surface of the frame 200; the fixed end of the positioning arm 120 is connected to the arm seat 210 at the bottom of the frame 200 through the elastic positioning node composition 130. .
  • the axle box elastic suspension system 150 includes an annular rubber cushion 151 disposed on the bottom surface of the platform 121, and an inner steel spring pressed against the annular rubber cushion 151 in parallel. 152 and outer steel spring 153, and a series of rubber springs 154 lining the inner steel spring 152, as shown in FIG. 13, in the present embodiment, a series of rubber springs 154 includes an inverted T-shaped cone located at the center of the inner steel spring 152.
  • the column 154a, the multi-layered metal foil 154b and the multilayer rubber sheet 154c are alternately arranged with an integrally vulcanized laminated rubber layer 154d, and a rigid cap 154e located outside the laminated rubber layer 154d.
  • the top of the rigid cap 154e is located inside the steel.
  • the upper end surface of the spring 152 and the outer steel spring 153, the bottom of the inverted T-shaped tapered post 154a is inserted into the intermediate through hole 154f of the laminated rubber layer 154d until it is disposed between the central circular hole 151a of the annular rubber cushion 151 and the bottom surface 121a of the cap 121.
  • a series of rubber springs 154 are loosely separated from the upper end plane of the annular rubber cushion 151 in the empty state, and a series of rubber springs 154 are abutted against the central circular hole 151a of the annular rubber cushion 151 in the heavy vehicle state. On the plane of the cap.
  • the axle box elastic suspension system 150 effectively reduces the high-frequency impact of the vehicle during high-speed operation, and adds a series of rubber springs 154 with load-bearing and vibration-reducing functions, thereby increasing the weight of the frame-type bogie of the heavy-duty working condition. To the stiffness, the variable stiffness of the framed bogie axle housing is achieved.
  • axle box elastic suspension system of the invention is as follows:
  • the axle box positioning device When the axle box positioning device is in the initial installation state or the empty working condition, the lower end of a series of rubber springs is suspended, and the vertical vibration of the wheel pair is directly transmitted to the positioning arm, and then the outer steel spring, the inner steel spring and the rubber cushion For mitigation, the impact energy is eventually absorbed by the rubber cushion and the hydraulic shock absorber in the vibration.
  • the vertical stiffness K of the axle box positioning device of the empty working condition can be approximated as:
  • K K outer steel spring + K inner steel spring
  • the large vertical load causes the outer steel spring and the inner steel spring to be compressed, and the first rubber spring 154 moves downward until it passes through the middle circular hole with the annular rubber cushion 151.
  • the 151a abuts against the bottom surface 121a of the cap 121.
  • the vertical vibration of the wheel pair is transmitted directly to the positioning arm, which is then relieved by the outer steel spring, the inner steel spring, a series of rubber springs and a rubber cushion.
  • the impact energy is finally a series of rubber springs, rubber cushions and vibrations. Hydraulic shock absorber absorption.
  • the stiffness K of the axle box positioning device of the heavy-duty working condition can be approximated as:
  • K K outer steel spring + K inner steel spring + K series rubber spring
  • the vertical stiffness of the axle box positioning device is greatly increased, and the variable stiffness of the frame-type bogie and the heavy-duty working conditions is realized, under a certain heavy vehicle load. Due to the increase of the vertical stiffness, the vertical deflection of the system is reduced, and the deflection of the overhead and heavy vehicles is effectively controlled.
  • the intervention of the series of rubber springs 154 also increases the vibration damping capacity of the axle box positioning device; in addition, in the present embodiment, the vertical hydraulic damper 170 has a vertical damping force.
  • the vertical hydraulic damper with secondary damping force is compressed for a large stroke and then enters its secondary damping condition.
  • the secondary damping force is much larger than its first-order damping force.
  • the series of rubber springs involved in the working conditions of the bogies in the trucks finally increased the damping force of the heavy-duty working conditions, realizing the damping force of the axle box body and the heavy-duty working conditions of the frame-type bogies, and solved the traditional trucks.
  • the frame type bogie arm type axle box positioning device cannot meet the problem that the frame type bogie can relieve high frequency disturbance, absorb vibration energy and provide elastic positioning.
  • the elastic positioning node assembly 130 includes two elastic positioning sleeves 133 , two rigid positioning sleeves 132 , and a positioning bolt 131 .
  • the two elastic positioning sleeves 133 are enclosed and disposed on the positioning rotating arm 120 .
  • the two rigid positioning sleeves 132 are enclosed, and the inner liner is enclosed in the elastic cavity 134 formed by the two elastic positioning sleeves 133; the bottom of the frame 200 located at the position of the elastic positioning node 130 is provided with a rotating arm.
  • the seat 210 is embedded in the mounting cavity 215 of the arm seat 210.
  • the lifting plate 211 on both sides of the arm base 200 is provided with a fixing hole 214. As shown in FIG. 5, the arm seat 210 in this embodiment.
  • the fixing holes 214 of the side hanging plates 211 are fixed holes 214 formed by the upper hanging plate 212 and the lower lower clamping plate 213 connected to the frame 200, and the lower fixing plate 213 and the upper hanging plate 212 are fixed by the bolts from bottom to top. connection.
  • the positioning bolts 131 pass through the fixing holes 214 of the lifting plate on the side of the arm base 210, the elastic cavity 134, the positioning cavity 135 formed by the two rigid positioning sleeves 132, and the other side of the lifting arm seat 210.
  • the fixing holes 214 of the plate are fixed by nuts, and one end of the two rigid positioning sleeves 132 extends to the intermediate portion of the elastic cavity 134, and the other end extends to the fixing hole 214 of the other side of the arm holder 210.
  • the lower clamping plate 213 is screwed from the bottom to the top of the lifting plate 212 by bolts, so that the lower clamping plate 213 holds the elastic positioning node component 130, which facilitates the connection between the rotating end of the positioning arm 120 and the frame 200.
  • the lifting plate 211 can also adopt a whole board, and the fixing hole 214 is opened thereon.
  • the positioning bolt 131 sequentially passes through the fixing hole 214 of the hanging plate on the side of the frame 200, the elastic cavity 134, and two rigid positioning positions.
  • the sleeve 132 encloses the formed positioning cavity 135 and the fixing hole 214 through the hanger plate on the other side of the frame 200 and is fixed by a nut.
  • the end surface of the positioning arm 120 is provided with a lifting shoulder 122
  • the vertical hydraulic damper mounting seat 171 is provided with a wheel pair lifting 230 that cooperates with the lifting shoulder 122.
  • the gap between the positioning arm 120 and the clamp ferrule 160 is filled with a sealant, and the seals of the positioning rot arm 120 and the clamp ferrule 160 and the bearing rear stop 113a are both labyrinth seal structures 140, effectively improving The dustproof and oil-repellent ability of the axle housing 110 is provided; in addition, the infrared shaft temperature detecting hole 161 is disposed in the middle portion of the clamping hoop 160 in the embodiment, which solves the problem that the existing axle box of the existing truck bogie cannot be operated during the line operation.
  • infrared temperature measurement technology Insufficient use of infrared temperature measurement technology can detect the bearing temperature of the train under running condition in real time, avoid the hot shaft failure caused by the leak detection, and ensure the safety of railway transportation; since the middle part of the clamp hoop 160 is provided with the infrared shaft temperature detecting hole 161 Therefore, a rubber boot 114 is provided between the infrared shaft temperature detecting hole 161 and the wheel pair bearing 113, thereby effectively preventing dust from penetrating from the infrared shaft temperature detecting hole 161 at the intermediate portion of the clamp hoop 160.
  • the axle housing 110 is provided with an axle housing annular groove 110a at the mounting surface of the anti-skid adapter 180, and the anti-skid adapter 180 is in the shaft housing 110.
  • the corresponding position of the installation is provided with an anti-skid adapter yoke 181 that cooperates with the axle housing annular groove 110a, and the mounting surface of the axle housing annular groove 110a and the anti-skid adapter yoke 181 is lined with The rubber washer 182, the anti-skid adapter yoke 181 is inserted into the axle housing annular groove 110a, and is lined with a rubber washer 182, and then the anti-skid adapter 180 is fixedly coupled to the axle housing 110 by bolts.
  • the utility model changes the cooperation mode of the axle box body and the anti-skid device adapter seat, that is, the positioning arm 120 no longer processes the convex ring, and is changed into the machining plane and the axial groove 110a of the axle box body, wherein the machining plane energy can be processed.
  • the shaft box annular groove 110a can be processed together with the corresponding tool when the saddle surface is processed in the shaft case 110, thereby avoiding the processing interference of the bearing table 121 on the mounting surface and reducing the processing.
  • the processing procedure can effectively reduce the processing difficulty of the axle box body and the anti-skid device adapter without changing the good matching between the mechanical anti-skid device and the axle box body, and improve the processing technology of the positioning arm;
  • the mounting surface of the axle housing annular groove 110a and the anti-skid adapter socket 181 is lined with a rubber gasket 182, which ensures the tight connection of the anti-skid adapter 180 and the axle housing 110, thereby effectively preventing dust and pollutants.
  • the infiltration greatly improves the dust and grease resistance of the axle box.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

L'invention concerne un bogie d'un wagon ferroviaire express. Le bogie comporte un bâti (200), quatre ensembles de dispositifs (100) de positionnement de boîte d'essieu du type à bras tournant, deux ensembles de composants (500) de paire de roues, une traverse oscillante (300) et un ensemble de dispositifs (600) de frein de base. Le bâti comporte en outre une paire de poutres longitudinales (280) en forme d'arc. Une cavité (244) en forme de U dans le milieu d'un longeron latéral (240) de bâti est munie d'une plate-forme (245) de montage de ressort secondaire en caoutchouc. La traverse oscillante (300) utilise une embase (360) de montage de ressort secondaire en caoutchouc constituée d'un élément forgé pour remplacer une structure de soudure. Un système (150) de suspension élastique de boîte d'essieu est muni d'un ressort primaire (154) en caoutchouc. Le bogie est applicable à des wagons ferroviaires express d'une vitesse de circulation de 140 km/h à 160 km/h et d'une charge sur essieu ne dépassant pas 18t.
PCT/CN2018/075133 2017-01-23 2018-02-02 Bogie de wagon ferroviaire express Ceased WO2018133880A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201720103089.3U CN206456374U (zh) 2017-01-23 2017-01-23 铁路快运货车转向架
CN201720103089.3 2017-01-23
CN201710058580.3A CN106809233B (zh) 2017-01-23 2017-01-23 铁路快运货车转向架
CN201710058580.3 2017-01-23

Publications (1)

Publication Number Publication Date
WO2018133880A1 true WO2018133880A1 (fr) 2018-07-26

Family

ID=62908496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/075133 Ceased WO2018133880A1 (fr) 2017-01-23 2018-02-02 Bogie de wagon ferroviaire express

Country Status (1)

Country Link
WO (1) WO2018133880A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU229670U1 (ru) * 2024-06-24 2024-10-18 Открытое акционерное общество "Тверской вагоностроительный завод" (ОАО "ТВЗ") Тележка пассажирского железнодорожного транспортного средства

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280536B1 (fr) * 1974-08-02 1976-12-31 Creusot Loire
CN2517641Y (zh) * 2001-12-17 2002-10-23 齐齐哈尔铁路车辆(集团)有限责任公司 高速货车转向架
CN106809233A (zh) * 2017-01-23 2017-06-09 中车长江车辆有限公司 铁路快运货车转向架
CN206456374U (zh) * 2017-01-23 2017-09-01 中车长江车辆有限公司 铁路快运货车转向架

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280536B1 (fr) * 1974-08-02 1976-12-31 Creusot Loire
CN2517641Y (zh) * 2001-12-17 2002-10-23 齐齐哈尔铁路车辆(集团)有限责任公司 高速货车转向架
CN106809233A (zh) * 2017-01-23 2017-06-09 中车长江车辆有限公司 铁路快运货车转向架
CN206456374U (zh) * 2017-01-23 2017-09-01 中车长江车辆有限公司 铁路快运货车转向架

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU229670U1 (ru) * 2024-06-24 2024-10-18 Открытое акционерное общество "Тверской вагоностроительный завод" (ОАО "ТВЗ") Тележка пассажирского железнодорожного транспортного средства
RU2843318C1 (ru) * 2024-10-02 2025-07-11 Открытое акционерное общество "Тверской вагоностроительный завод" (ОАО "ТВЗ") Рама тележки железнодорожного транспортного средства
RU2843320C1 (ru) * 2024-10-02 2025-07-11 Открытое акционерное общество "Тверской вагоностроительный завод" (ОАО "ТВЗ") Тележка железнодорожного транспортного средства с ограничителями высот винтовых пружин
RU2848050C1 (ru) * 2025-03-26 2025-10-16 Акционерное общество "Научно-исследовательский и конструкторско-технологический институт подвижного состава" (АО "ВНИКТИ") Тележка железнодорожного транспортного средства

Similar Documents

Publication Publication Date Title
CN106809233B (zh) 铁路快运货车转向架
CN105774834B (zh) 一种无摇枕市域快线轨道车辆转向架
CN206456374U (zh) 铁路快运货车转向架
EP2783939B1 (fr) Bogie de véhicule ferroviaire à grande vitesse
CN103625494B (zh) 一种窄轨客车转向架
CN202243514U (zh) 高速动车组转向架
CN205652137U (zh) 一种无摇枕市域快线轨道车辆转向架
CN101857033B (zh) 一种80km/h速度等级B型地铁车辆转向架
CN104097655A (zh) 铁路快运货车转向架
CN103625493A (zh) 大轴重轨道车辆转向架
EP4086136B1 (fr) Bogie à cadre sans traverse approprié pour un wagon de fret à grande vitesse
CN111994108A (zh) 轴箱导柱定位式三轴焊接自导向径向铁路货车转向架
CN203372249U (zh) 大轴重轨道车辆转向架
CN214356035U (zh) 一种用于铁路货车的铰接构架转向架
CN103625499B (zh) 一种窄轨客车转向架构架
CN203372250U (zh) 一种窄轨客车转向架
CN206589893U (zh) 一种无摇枕非动力转向架构架
CN106080642B (zh) 低地板轨道车辆转向架摇枕结构及转向架
CN201058609Y (zh) 用于地铁车的转向架
CN216332046U (zh) 用于轨道工程机械且具有紧凑式一系悬挂的转向架
CN206456373U (zh) 货车转向架轴箱定位装置
CN213262381U (zh) 高速大轴重电传动轨道工程车转向架
CN203902571U (zh) 铁路快速货车转向架的构架
WO2018133880A1 (fr) Bogie de wagon ferroviaire express
CN203902567U (zh) 铁路快运货车转向架

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18742294

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18742294

Country of ref document: EP

Kind code of ref document: A1