Welded frame bogie and rail train

Abstract

The present invention provides a welded frame bogie and a rail vehicle, which include two sets of wheel pairs arranged in parallel and spaced apart, two side beams arranged in parallel and spaced apart, and a cross beam located between the side beams, the two ends of the cross beam are respectively connected to the middle of the two side beams; the two ends of the wheel pair are respectively rotatably located on the bottom surfaces of the two side beams, and the cross beam is located between the two sets of wheel pairs; the side beam is a single web box-type structure, the side beam includes a first cover plate and a first bottom plate arranged in spaced apart, and a first web plate located between the first cover plate and the first bottom plate, and the first web plate is connected to the middle of the first cover plate and the first bottom plate. The side beam is welded by the first cover plate, the first bottom plate and the first web plate, and its structure is reliable, the process is simple, the overall weight of the side beam is light, and the welding difficulty is low, thereby reducing its manufacturing and maintenance costs. Therefore, the welded frame bogie provided by the present invention solves the technical problem that the side beam has a complex structure and a large mass, which leads to high manufacturing and maintenance costs.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of rail vehicles, and in particular to a welded frame bogie and a rail vehicle. Background Art

[0002] Bogie is one of the most important components in the structure of rail trains. It refers to a running device that can rotate relative to the car body. It can increase vehicle load, increase speed, ensure safety, reduce vibration, and improve braking. It plays an important role in the operation of rail trains. The main structural forms of rail train bogies include: three-piece bogies and welded frame bogies. Compared with the three-piece bogies, the welded frame bogie has the characteristics of simple structure, light weight, and easy maintenance. Therefore, more and more rail trains such as subway construction and maintenance engineering vehicles use welded frame bogies.

[0003] At present, the welded frame bogie includes a frame, which is the skeleton of the bogie. The frame is formed by cross beams and side beams, and is used to connect various components of the bogie and transmit forces in various directions, and is used to maintain the position of the axle in the bogie.

[0004] However, the side beams are often complex in structure and heavy in mass, resulting in high manufacturing and maintenance costs. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a welded frame bogie and a rail vehicle to solve the technical problem that the side beams are often complex in structure and heavy in mass, resulting in high manufacturing and maintenance costs.

[0006] An embodiment of the present invention provides a welded frame bogie, comprising: two sets of wheelsets arranged in parallel and at intervals, two side beams arranged in parallel and at intervals, and a cross beam located between the side beams, wherein two ends of the cross beam are respectively connected to the middle of the two side beams;

[0007] The two ends of the wheelset are rotatably located on the bottom surfaces of the two side beams, and the cross beam is located between the two sets of wheelsets;

[0008] The side beam is a single-web box-type structure, and the side beam includes a first cover plate and a first bottom plate that are spaced apart, and a first web plate located between the first cover plate and the first bottom plate, and the first web plate is connected to the middle of the first cover plate and the first bottom plate.

[0009] With such arrangement, since there is only one web, the side beam structure is relatively simple, which reduces the overall weight of the side beam, reduces the difficulty of welding, and thus reduces its manufacturing and maintenance costs.

[0010] In some embodiments that may include the above embodiments, the wheelset includes an axle, two bearings and two wheels, the two bearings and the two wheels are respectively located at both ends of the axle, and the bearings are located on the outside of the wheels, and the bearings are arranged opposite to the bottom surfaces of the two ends of the side beams.

[0011] In some embodiments that may include the above embodiments, a suspension device is further included. The suspension device is located between the side beam and the bearing. A sleeve is provided in the middle of both ends of the side beam. The sleeve is sleeved on the outside of the suspension device.

[0012] In some embodiments that may include the above embodiments, the primary suspension device further includes a steel spring and a rubber pile spring, and the rubber pile spring is inserted into the steel spring.

[0013] In some embodiments that may include the above embodiments, the rubber pile spring includes a base and a conical column, the base has a channel extending from the top surface through the bottom surface, a portion of the conical column is inserted into a portion of the channel from the top end of the base, an area enclosed by an inner wall of the channel gradually increases in a direction away from the bearing, an area enclosed by an outer wall of the conical column gradually increases in a direction away from the bearing, and the base and the conical column are connected together by rubber vulcanization.

[0014] In some embodiments that may include the above embodiments, a load-bearing saddle is further included. The load-bearing saddle is located between a series of suspension devices and a bearing. The load-bearing saddle has a platform on a side away from the bearing. The platform has a protrusion on a side away from the bearing. The protrusion extends into the bottom end of the channel, and the bottom surface of the base abuts against the top surface of the platform.

[0015] In some embodiments that may include the above embodiments, an upper cover is further included, the upper cover is located at the top end of the sleeve, a first protrusion is provided on the side of the upper cover facing the bearing, a second protrusion is provided on the side of the first protrusion facing the bearing, the first protrusion extends into the steel spring, and the second protrusion extends into the groove at the top end of the cone column.

[0016] In some embodiments, which may include the above embodiments, the rubber on both lateral sides and the bottom side of the cone column has holes.

[0017] In some embodiments that may include the above embodiments, a lower center plate is further included. The lower center plate is used for rotationally connecting with the vehicle body, and the lower center plate is a plane center plate or a spherical center plate.

[0018] In addition, an embodiment of the present invention further provides a rail train, a rail train comprising at least a braking device and the welded frame bogie in the above embodiment.

[0019] The welded frame bogie and rail vehicle provided by the embodiment of the present invention include two sets of wheel sets arranged in parallel and spaced apart, two side beams arranged in parallel and spaced apart, and a cross beam located between the side beams, and the two ends of the cross beam are respectively connected to the middle of the two side beams; the two side beams and the cross beam are integrally welded into an H-shaped frame, which is used to connect (install) various components of the bogie and transmit forces in various directions, and to maintain the positions of other components in the bogie. The two ends of the wheel set are rotatably located on the bottom surfaces of the two side beams, and the cross beam is located between the two sets of wheel sets. The wheel set rotates relative to the track through the traction device, so that the bogie moves with the traction device. The side beam is a single-web box-type structure, and the side beam includes a first cover plate and a first bottom plate arranged in intervals, and a first web plate located between the first cover plate and the first bottom plate, and the first web plate is connected to the middle of the first cover plate and the first bottom plate. The side beam is welded by the first cover plate, the first bottom plate and the first web plate, and its structure is reliable, the process is simple, the overall weight of the side beam is light, and the welding difficulty is low, thereby reducing its manufacturing and maintenance costs. Therefore, the welded frame bogie provided in this embodiment solves the technical problem that the side beam structure is complex and heavy, resulting in high manufacturing and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. It is obvious that the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A top view of a welded frame bogie provided by an embodiment of the present invention;

[0022] Figure 2 Another top view of a welded frame bogie provided by an embodiment of the present invention;

[0023] Figure 3 A front view of a welded frame bogie provided by an embodiment of the present invention;

[0024] Figure 4 A partial cross-sectional view of a welded frame bogie provided in an embodiment of the present invention in which the lower center plate is a flat center plate;

[0025] Figure 5 A partial cross-sectional view of a spherical lower center plate in a welded frame bogie provided in an embodiment of the present invention;

[0026] Figure 6 A side view of a welded frame bogie provided by an embodiment of the present invention;

[0027] Figure 7Another side view of a welded frame bogie provided by an embodiment of the present invention;

[0028] Figure 8 A top view of a frame in a welded frame bogie provided by an embodiment of the present invention;

[0029] Fig. 9 A side view of a side beam in a welded frame bogie provided by an embodiment of the present invention;

[0030] Fig.10 A side view of a portion of a side beam in a welded frame bogie provided by an embodiment of the present invention;

[0031] Fig.11 A top view of a portion of side beams in a welded frame bogie provided by an embodiment of the present invention;

[0032] Fig.12 A side view of a portion of a cross beam in a welded frame bogie provided by an embodiment of the present invention;

[0033] Fig.13 A top view of a portion of the cross beams in a welded frame bogie provided by an embodiment of the present invention;

[0034] Fig.14 A structural diagram of a primary suspension device in a welded frame bogie provided by an embodiment of the present invention;

[0035] Fig.15 A top view of a rubber pile spring in a welded frame bogie provided by an embodiment of the present invention;

[0036] Fig.16 A cross-sectional view of a rubber pile spring in a welded frame bogie provided in an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 10: wheelset;

[0039] 20: side beam;

[0040] 30: beam;

[0041] 40: primary suspension device;

[0042] 50: load-bearing saddle;

[0043] 60: upper cover;

[0044] 101: axle;

[0045] 102: bearing;

[0046] 103: Wheel;

[0047] 201: first cover plate;

[0048] 202: first bottom plate;

[0049] 203: first web;

[0050] 204: sleeve;

[0051] 205: reinforcement ring;

[0052] 206: first reinforcing rib plate;

[0053] 207: second reinforcing rib plate;

[0054] 208: Guide frame;

[0055] 209: chute;

[0056] 301: second cover plate;

[0057] 302: second bottom plate;

[0058] 303: Second web;

[0059] 304: the third reinforcing rib plate;

[0060] 305: opening;

[0061] 306: Lower side bearing;

[0062] 307: partition;

[0063] 401: Steel spring;

[0064] 402: base;

[0065] 403: cone column;

[0066] 404: channel;

[0067] 405: rubber;

[0068] 406: groove;

[0069] 407: through hole;

[0070] 408: Holes;

[0071] 501: Platform;

[0072] 502: convex;

[0073] 701: Lower heart plate;

[0074] 702: center pin;

[0075] 703: limit ring;

[0076] 704: wear disc;

[0077] 705: stop ring;

[0078] 801: first brake beam;

[0079] 802: second brake beam;

[0080] 803: floating lever;

[0081] 804: middle tie rod;

[0082] 805: brake shoe;

[0083] 901: bottom limit;

[0084] 902: Side limit. DETAILED DESCRIPTION

[0085] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0086] The bogie is located between the car body and the track. For engineering vehicles used for subway line maintenance, the bogie has a simple structure, is easy to maintain, and is reliable and durable, which is the ideal configuration for subway engineering vehicles. Compared with the traditional three-piece bogie, the welded frame bogie has the characteristics of simple structure, light weight, and easy maintenance. Therefore, more and more subway construction and maintenance engineering vehicles use welded frame bogies.

[0087] In the related art, a welded frame bogie includes a frame, which is the skeleton of the bogie. The frame is formed by cross beams and side beams, and is used to connect various components of the bogie and transmit forces in various directions, and to maintain the position of the axle in the bogie.

[0088] However, the side beam generally adopts a double-web box structure. The double-web box structure has two webs, which makes the side beam structure more complicated and heavier, increases the difficulty of welding, and leads to higher manufacturing and maintenance costs.

[0089] This embodiment provides a welded frame bogie, in which the side beams of the double-web box-type structure are changed into the side beams of the single-web box-type structure. Since there is only one web, the side beam structure is relatively simple, which reduces the overall weight of the side beam and the difficulty of welding, thereby reducing its manufacturing and maintenance costs.

[0090] like Figure 1-Figure 5As shown, this embodiment provides a welded frame bogie, comprising two side beams 20 arranged in parallel and spaced apart and a cross beam 30 located between the side beams 20, and two ends of the cross beam 30 are respectively connected to the middle of the two side beams 20. The two side beams 20 and the cross beam 30 are integrally welded into an H-shaped frame, which is used to connect (install) various components of the bogie and transmit forces in various directions, and is used to maintain the positions of other components in the bogie.

[0091] In this embodiment, two sets of wheel sets 10 are also provided in parallel and spaced apart, wherein the two ends of each set of wheel sets 10 are rotatably located on the bottom surfaces of the two side beams 20, and the cross beam 30 is located between the two sets of wheel sets 10. The wheel sets 10 are the parts where the bogie contacts the track, and the traction device of the rail train generates traction force on the bogie, and the wheel sets 10 of the bogie rotate relative to the track so that the bogie moves in the direction of the traction force.

[0092] In this embodiment, continue to refer to Figure 6 The side beam 20 is a single-web box-type structure. The side beam 20 includes a first cover plate 201 and a first bottom plate 202 that are spaced apart, and a first web 203 located between the first cover plate 201 and the first bottom plate 202. The first web 203 is connected to the middle of the first cover plate 201 and the first bottom plate 202. The side beam 20 is welded by the first cover plate 201, the first bottom plate 202 and the first web 203. The structure is reliable and the process is simple. Compared with the side beam 20 that adopts a double-web box-type structure, the side beam 20 of the single-web box-type structure has only one web, which makes the structure of the side beam 20 relatively simple, and the overall weight of the side beam 20 is relatively light, which can reduce the difficulty of welding, thereby reducing the manufacturing and maintenance costs of the side beam 20.

[0093] The welded frame bogie provided in this embodiment comprises two sets of wheel sets 10 arranged in parallel and spaced apart, two side beams 20 arranged in parallel and spaced apart, and a cross beam 30 located between the side beams 20, and the two ends of the cross beam 30 are respectively connected to the middle of the two side beams 20; the two side beams 20 and the cross beam 30 are integrally welded into an H-shaped frame, which is used to connect (install) the various components of the bogie and transmit forces in various directions, and to maintain the positions of other components in the bogie. The two ends of the wheel set 10 are respectively rotatably located on the bottom surfaces of the two side beams 20, and the cross beam 30 is located between the two sets of wheel sets 10. The wheel set 10 rotates relative to the track through the traction device, so that the bogie moves with the traction device. The side beam 20 is a single-web box-type structure, and the side beam 20 comprises a first cover plate 201 and a first bottom plate 202 arranged in spaced apart, and a first web plate 203 located between the first cover plate 201 and the first bottom plate 202, and the first web plate 203 is connected to the middle of the first cover plate 201 and the first bottom plate 202. The side beam 20 is welded by the first cover plate 201, the first bottom plate 202 and the first web plate 203. The structure is reliable and the process is simple. The overall weight of the side beam 20 is light and the welding difficulty is low, thereby reducing the manufacturing and maintenance costs. Therefore, the welded frame bogie provided in this embodiment solves the technical problem that the side beam 20 has a complex structure and a large mass, which leads to high manufacturing and maintenance costs.

[0094] For further information, please refer to Figure 7-Figure 11 , the first cover plate 201 and the first bottom plate 202 are arranged in parallel and spaced apart, and the middle parts of the first cover plate 201 and the first bottom plate 202 are parallel to the horizontal plane. Compared with setting the side beam 20 as a U-shaped structure, that is, the middle parts of the first cover plate 201 and the first bottom plate 202 protrude toward the direction of the track, the protruding part makes the distance between the bottom of the side beam 20 and the bottom limit 901 of the track smaller, reducing the adaptability of the bogie to different bottom limits 901. When the middle parts of the first cover plate 201 and the first bottom plate 202 are arranged in parallel with the horizontal plane, the distance between the bottom of the side beam 20 and the bottom limit 901 of the track is larger, improving the adaptability of the bogie to different bottom limits 901.

[0095] In this embodiment, a plurality of first reinforcing ribs 206 are provided between the first cover plate 201 and the first bottom plate 202. The first reinforcing ribs 206 are respectively located on both sides of the first web plate 203, and the first reinforcing ribs 206 are connected to the first cover plate 201, the first bottom plate 202 and the first web plate 203 by welding. The first reinforcing ribs 206 ensure the bending resistance of the side beam 20 to improve the structural strength of the side beam 20.

[0096] In this embodiment, two reinforcing rings 205 are arranged in the middle of the first web 203, and the reinforcing rings 205 are all arranged in the first web 203, wherein the second reinforcing ribs 207 are respectively arranged between the reinforcing ring 205 and the first cover plate 201 and the first bottom plate 202, and the second reinforcing ribs 207 are connected to the reinforcing ring 205, the first web 203 and the first bottom plate 202 or the first cover plate 201 by welding. That is, the second reinforcing ribs 207 at the bottom end of the reinforcing ring 205 are connected to the reinforcing ring 205, the first web 203 and the first bottom plate 202, and the second reinforcing ribs 207 at the top end of the reinforcing ring 205 are connected to the reinforcing ring 205, the first web 203 and the first cover plate 201. The bending resistance of the side beam 20 is further guaranteed to improve the structural strength of the side beam 20.

[0097] In this embodiment, continue to refer to Fig.12 and Fig.13 The cross beam 30 is a double-web box structure, including a second cover plate 301 and a second bottom plate 302 arranged at intervals, and two second webs 303 arranged at intervals between the second cover plate 301 and the second bottom plate 302, and the second webs 303 are connected to the second cover plate 301 and the second bottom plate 302. The second cover plate 301, the second bottom plate 302 and the second webs 303 can be connected together by welding, so the structure is reliable and the process is simple.

[0098] In this embodiment, third reinforcing ribs 304 parallel to the second web 303 are provided at both ends of the cross beam 30, the third reinforcing ribs 304 are located between the second cover plate 301 and the second bottom plate 302, and the third reinforcing ribs 304 are connected to the second cover plate 301 and the second bottom plate 302. The third reinforcing ribs 304 ensure the bending resistance of the cross beam 30 to improve the structural strength of the cross beam 30.

[0099] Furthermore, the end surface of the third reinforcing rib plate 304 close to the side beam 20 and the end surface of the cross beam 30 close to the side beam 20 are both connected to the middle of the first web 203 of the side beam 20 by welding. In other words, the end surfaces of the second cover plate 301, the second bottom plate 302 and the two second webs 303 in the axial direction are connected to the middle of the first web 203; in addition, the end surface of the third reinforcing rib plate 304 close to the side beam 20 is also connected to the middle of the first web 203. The third reinforcing rib plate 304 increases the connection area between the cross beam 30 and the side beam 20, and enhances the overall strength of the frame.

[0100] Furthermore, the second bottom plate 302 has notches at both ends, and the first bottom plate 202 protrudes in the direction of the notches of the second bottom plate 302, so that the end surface of the first bottom plate 202 protruding toward the notches abuts against the end surface of the second bottom plate 302 notches and facing the first bottom plate 202. At this time, the bottom surface of the second web 303 corresponding to the notches and the top surface of the protruding portion of the first bottom plate 202 can be connected together by welding, thereby increasing the connection area between the second web 303 and the first bottom plate 202 and enhancing the overall strength of the frame.

[0101] Furthermore, the two sides of the protruding portion of the first bottom plate 202 have an arc-shaped transition structure, which increases the connection area between the first bottom plate 202 and the protruding portion and enhances the overall strength of the frame. The arc-shaped transition structure can be connected to the first bottom plate 202 by welding, or the arc-shaped transition structure can be integrally formed with the first bottom plate 202.

[0102] In this embodiment, a plurality of partitions 307 may be provided in the middle of the inner wall of the cross beam 30, the partitions 307 are perpendicular to the second webs 303, and the partitions 307 are connected to the second cover plate 301, the second bottom plate 302 and the two second webs 303. The partitions 307 ensure the bending resistance of the cross beam 30 to improve the structural strength of the cross beam 30.

[0103] Furthermore, an opening is provided in the middle of the partition 307, and the opening can reduce the weight of the partition 307, thus having a weight-reducing effect.

[0104] In this embodiment, each set of wheels 10 includes an axle 101, two bearings 102 and two wheels 103. The two bearings 102 and the two wheels 103 are respectively located at both ends of the axle 101, and the bearings 102 are located on the outside of the wheels 103. The bearings 102 are arranged opposite to the bottom surfaces of both ends of the side beam 20. The bearings 102 allow the wheels 10 to be rotatably located on the bottom surface of the side beam 20, and the axle 101 and the inner ring of the bearing 102 rotate in the same direction, and the axle 101 will not cause wear to the parts in contact with the outer ring of the bearing 102.

[0105] For example, the wheelset 10 may be a truck RD2 wheelset, the inner distance of the wheels 103 of which is 1353±2 mm and the wheelbase is 1700 mm. The bearing 102 may be a double-row tapered roller bearing, which can withstand both radial force and large axial force. The wheelset 10 may be made of standard parts, and the parts are highly interchangeable, which can reduce manufacturing costs and later maintenance costs.

[0106] In this embodiment, in order to mitigate the impact and vibration of the track on the rail train, improve the reliability of the components and the comfort of the crew, a shock absorbing system, namely a primary suspension device 40, is provided between the frame and the bearing 102. The load above the frame is evenly distributed to the wheelset 10 through the primary suspension device 40, so that the axle weight is consistent. The primary suspension device 40 is located between the side beam 20 and the bearing 102, and the load above the frame passes through the side beam 20, the primary suspension device 40, the bearing 102 in sequence, and is finally evenly distributed to the wheelset 10.

[0107] In this embodiment, continue to refer to Figure 14-16 A sleeve 204 is provided in the middle of both ends of the side beam 20, and the sleeve 204 is sleeved on the outside of the primary suspension device 40. The sleeve 204 can stably fix the primary suspension device 40 between the side beam 20 and the bearing 102 to prevent the primary suspension device 40 from moving horizontally. At the same time, it can avoid the increase in the distance between the side beam 20 and the bearing 102 due to the addition of the primary suspension device 40, so that the center of gravity of the bogie is lowered.

[0108] Compared with partially setting an axle box on the outer wall of the bearing 102 to accommodate the primary suspension device 40, the axle box is large in size, occupies a large volume at the bottom and both sides of the bogie, and is close to the bottom limit 901 and the side limit 902, which reduces the adaptability of the bogie to different bottom limits 901 and side limits 902. The sleeve 204 is located in the middle of the side beam 20, the sleeve 204 is small in size and is located above the bearing 102, and the sleeve 204 is far away from the bottom limit 901 and the side limit 902, so that the bogie can meet the differentiated limit requirements of various urban rail transit, and adapt to the national railway limit and most subway limits.

[0109] In this embodiment, the primary suspension device 40 further includes a steel spring 401 and a rubber spring. The rubber spring is inserted into the steel spring 401. The steel spring 401 and the rubber spring play a role of buffering. When the vehicle body is located on the bogie, the weight of the vehicle body is transferred to the steel spring 401 and the rubber spring through the side beam 20. The steel spring 401 and the rubber spring are deformed to play a role of shock absorption and buffering.

[0110] When the frame presses the steel spring 401 downward, the steel spring 401 deforms in the vertical direction, providing vertical buffering. The rubber pile spring can not only deform in the vertical direction but also deform in the horizontal direction, so it can provide vertical and horizontal buffering.

[0111] In this embodiment, the rubber pile spring includes a base 402 and a cone column 403. The base 402 has a channel 404 that runs through the bottom surface from the top surface, and a part of the cone column 403 is arranged in the part of the channel 404 from the top of the base 402. Specifically, there is a certain distance between the bottom surface of the cone column 403 and the horizontal plane where the bottom surface of the base 402 is located, and the top surface of the cone column 403 is higher than the top surface of the base 402, so that the cone column 403 is arranged higher than the base 402. The area enclosed by the inner wall of the channel 404 gradually increases in the direction away from the bearing 102, and the area enclosed by the outer wall of the cone column 403 gradually increases in the direction away from the bearing 102. The base 402 and the cone column 403 are connected together by rubber 405. At this time, the rubber pile spring is subjected to the pressure of the frame, which will be transmitted to the base 402 through the cone column 403 and the rubber 405 in turn. Since the outer wall of the cone column 403 and the inner wall of the base 402 are inclined, the vertical pressure can be distributed to the horizontal direction, reducing the vertical pressure.

[0112] There is a gap between the bottom surface of the cone column 403 and the horizontal plane where the bottom surface of the base 402 is located, so that there is a buffer space between the cone column 403 and the base 402 to avoid contact and wear between the two during the vertical deformation of the rubber 405.

[0113] Furthermore, the cross-section of the cone column 403 in the vertical direction may be a triangle, a trapezoid, etc., as long as the area enclosed by the outer wall of the cone column 403 gradually increases in the direction away from the bearing 102 .

[0114] In this embodiment, a load saddle 50 is further included, and the load saddle 50 is located between the primary suspension device 40 and the bearing 102, and the load saddle 50 is used to fix the primary suspension device 40 between the bearing 102 and the sleeve 204. For example, a narrow load saddle can be selected, which has a simple structure, a small lateral area of ​​the part in contact with the bearing 102, a small overall volume, and a simple installation, and basically does not occupy additional space, which is conducive to reducing the volume of the bogie and widening the adaptability of the bogie to different side limits 902.

[0115] In this embodiment, a guide frame 208 is provided at the bottom end of the sleeve 204, and the guide frame 208 is connected to the sleeve 204. The guide frame 208 can fix the load saddle 50 between the bearing 102 and the primary suspension device 40. The guide frame 208 has guide blocks on the inner wall thereof, and the guide blocks extend into the load saddle 50 toward the two sides of the guide frame 208. The two sides of the load saddle 50 have gaps that cooperate with the guide blocks, so that the guide blocks cooperate with the load saddle 50, and the load saddle 50 is positioned so that the load saddle 50 can slide along the guide blocks and move only in the vertical direction.

[0116] In this embodiment, the side of the load-bearing saddle 50 away from the bearing 102 has a platform 501, and the side of the platform 501 away from the bearing 102 has a protrusion 502, which extends into the bottom end of the channel 404, and the bottom surface of the base 402 abuts against the top surface of the platform 501. The pressure on the rubber pile spring can be transmitted to the platform 501 through the base 402. The area of ​​the platform 501 is large, and the pressure is evenly distributed on the platform 501, reducing the pressure intensity on it.

[0117] The protrusion 502 can prevent the base 402 from moving in the horizontal direction, that is, the protrusion 502 can limit the horizontal displacement of the rubber pile spring.

[0118] In this embodiment, an upper cover 60 is further included. The upper cover 60 is located at the top end of the sleeve 204. Such a configuration facilitates the installation of a series of suspension devices 40. The upper cover 60 is fixed to the top end surface or the top inner wall of the sleeve 204 by welding.

[0119] The upper cover 60 has a first protrusion on one side facing the bearing 102, and a second protrusion on one side facing the bearing 102. The first protrusion extends into the steel spring 401, and the second protrusion extends into the groove 406 at the top of the cone column 403. The first protrusion can prevent the steel spring 401 from being displaced horizontally in the sleeve 204, and the second protrusion can prevent the rubber spring from being displaced horizontally.

[0120] In this embodiment, the rubber 405 on both lateral sides and the bottom side of the cone column 403 has holes 408, and the holes 408 include a first hole and a second hole, wherein the rubber 405 on both lateral sides of the cone column 403 respectively has the first hole, and the rubber 405 on one side of the bottom surface of the cone column 403 has the second hole.

[0121] When the rubber pile spring is subjected to force and produces vertical deformation, the rubber 405 has a buffering effect in the vertical direction. Since the rubber 405 has a second hole, that is, the rubber pile spring has a second hole in the vertical direction, the rigidity of the rubber 405 in the vertical direction is reduced, and the deformation of the rubber 405 will be greater, increasing the buffering stroke and making the vertical buffering effect stronger. Furthermore, the bottom surface of the second hole can be open, that is, the second hole is open at one end facing the protrusion 502.

[0122] Among them, since there is air in the second hole, when the rubber pile spring is subjected to force and produces vertical deformation, the air in the second hole will be compressed. If the second hole is a closed environment, the compressed air will produce a large pressure, which may cause the rubber pile spring to fail. Therefore, a through hole 407 that runs from the top surface to the bottom surface can be provided in the cone column 403, and the through hole 407 connects the second hole and the groove 406. The provision of the through hole 407 allows the air in the second hole to be transmitted to the external environment through the groove 406, so as to avoid excessive air pressure therein causing damage to the rubber pile spring.

[0123] When the rubber pile spring is subjected to force and produces lateral deformation, the rubber 405 has a buffering effect on it in the lateral direction. Since the rubber 405 has a first hole, that is, the rubber pile spring has a first hole in the lateral direction, the stiffness of the rubber 405 in the lateral direction is reduced, and the deformation of the rubber 405 will be greater, thereby increasing the buffering stroke and making the lateral buffering effect stronger.

[0124] The first hole can penetrate the bottom surface of the rubber 405 from the top surface of the rubber 405. At this time, the first hole can be connected with the second hole, and the air in the second hole can be transferred to the external environment through the first hole without setting the through hole 407.

[0125] Among them, holes 408 of different sizes, shapes and numbers can be set in the vertical, horizontal or longitudinal direction of the rubber 405 as needed. The hole 408 can be inside the rubber 405, and the hole 408 can also be connected to the external environment of the rubber 405. For example, the hole 408 is set to be a hole 408 that passes through the top and bottom surfaces of the rubber 405. In other words, the space between the cone column 403 and the base 402 can be filled with the rubber 405, and one or more holes 408 can be set at any position of the rubber 405 to reduce the rigidity of the rubber 405 in the direction with the hole 408, increase the buffer stroke, and reasonably match the three-way stiffness of the rubber pile spring, which can improve the anti-diamond stiffness of the bogie, improve the vertical, horizontal and longitudinal running stability of the vehicle, and increase the critical speed of the snaking motion of the bogie.

[0126] Furthermore, the rubber 405 can be fixed to the cone 403 and the base 402 by vulcanization.

[0127] Optionally, the side of the cone column 403 may be provided with an angle, that is, the side of the vertical cross section of the cone column 403 is not a straight line, but has an inflection point at the side near the bottom. In other words, the transverse cross-sectional area of ​​the outer wall of the bottom part of the cone column 403 remains unchanged or gradually increases in the direction toward the bearing 102. Such a configuration is beneficial to the vulcanization process and can reduce the vertical shear force of the rubber 405 at the inflection point.

[0128] Among them, the steel spring 401 can provide a larger empty vehicle deflection, the rubber pile spring provides a larger buffer stroke, and by designing different holes 408, a reasonable match of the three-way stiffness of the bogie primary suspension device 40 is achieved, so that it can have good operating quality in both empty and loaded states.

[0129] In this embodiment, Figure 4 and Figure 5As shown, the vehicle body further includes a lower center plate 701, which is used for rotationally connecting with the vehicle body, and the lower center plate 701 can be a plane center plate or a spherical center plate. The vehicle body is provided with an upper center plate at a position corresponding to the lower center plate 701, and the weight of the vehicle body is transmitted to the lower center plate 701 through the upper center plate.

[0130] Exemplarily, the lower center plate 701 can be a plane center plate. That is to say, the contact surfaces of the upper center plate and the lower center plate 701 are both planes, and the vertical load is transmitted from the center plate plane to the next-level component, and the transverse and longitudinal loads are borne by the flange around the lower center plate 701. The lower center plate 701 is arranged on the outer top surface of the cross beam 30 by bolt connection or / and welding, and a through center hole is arranged in the middle of the lower center plate 701, and the center pin 702 is inserted into the center hole. The function of the center pin 702 is to prevent the center plate from slipping during the operation of the vehicle. It has a simple structure, low manufacturing cost, and convenient maintenance and replacement. A limit ring 703 is arranged on the outer wall of the center pin 702, and the limit ring 703 is located at the top of the center hole, which can prevent the center pin 702 from moving further downward. Compared with setting a support seat in the middle of the inner wall of the cross beam 30 at a position opposite to the bottom end of the center pin 702 to prevent the center pin 702 from moving further downward, the manufacturing process of the limit ring 703 is simpler. The limiting ring 703 can be connected to the center pin 702 by integral molding or welding.

[0131] In order to extend the service life of the center plate, reduce the inspection and maintenance cost during the operation of the vehicle, and avoid direct contact between the upper center plate and the lower center plate 701, a wear plate 704 is added between the upper center plate and the lower center plate 701. The center pin 702 is sequentially inserted into the wear plate 704 and the lower center plate 701. The wear plate 704 can be replaced after being damaged.

[0132] Optionally, the lower center plate 701 can be a spherical center plate. The upper center plate on the vehicle body is a convex spherical surface, and the lower center plate 701 is a concave spherical surface. In other words, the upper center plate protrudes toward the bottom surface of the cross beam 30, and the lower center plate 701 also protrudes toward the bottom surface of the cross beam 30. The spherical surfaces of the upper center plate and the lower center plate 701 cooperate with each other. Vertical loads, longitudinal loads and transverse loads are all transmitted by the spherical surface. Part of the spherical surface of the lower center plate 701 can be placed inside the cross beam 30 after an opening is made on the top surface of the cross beam 30, and the lower center plate 701 can be connected to the cross beam 30 by welding and / or bolting.

[0133] In order to extend the service life of the core plate, a replaceable spherical wear plate 704 can be provided between the upper core plate and the lower core plate 701. A stop ring 705 is provided around the top of the inner wall of the lower core plate 701 to prevent the wear plate 704 from deviating from between the upper core plate and the lower core plate 701.

[0134] When the lower center plate 701 is detachably connected to the cross beam 30 by bolt connection or the like, the planar center plate and the spherical center plate can be replaced as needed.

[0135] In this embodiment, Figure 1 and Figure 2 As shown, lower side bearings 306 are arranged at both ends of the top surface of the cross beam 30. The lower side bearings 306 are arranged perpendicular to the axial direction of the cross beam 30 and in opposite directions. Upper side bearings are arranged at the position opposite to the lower side bearings 306 of the car body. Installing side bearings between the car body and the bogie can effectively suppress the serpentine motion of the bogie, suppress the rolling and shaking motion of the car body when the vehicle passes through a curve, and improve the stability of the vehicle. Exemplarily, the side bearings can be constant contact side bearings. When the car body is placed on the bogie, the rated compression amount of the constant contact side bearings is given, and a certain pre-pressure is generated between the upper side bearings and the lower side bearings 306. When the bogie and the car body have relative rotation or a tendency to relative rotation, friction resistance is generated between the contact surfaces of the upper side bearings and the lower side bearings 306. Because the friction resistance on the side bearings at both ends of the cross beam 30 is in opposite directions, an appropriate rotation resistance torque is formed.

[0136] In this embodiment, in order to generate necessary braking force so as to slow down or stop the vehicle at a specified distance, a braking device is also provided, and the braking device can adopt a middle pull rod sliding groove type single-side brake shoe brake. The function of the braking device is to transmit and amplify the braking force to each brake shoe 805, so that the brake shoe 805 presses the wheel 103 to generate a braking effect. The braking device at least includes: a floating lever 803, a middle pull rod 804, a first brake beam 801, a second brake beam 802 and a roller, etc. Among them, the braking force first acts on the floating lever 803 of the braking device, and the floating lever 803 drives the first brake beam 801 connected to one end of the middle pull rod 804 to move in the direction away from the cross beam 30. The middle pull rod 804 passes through the opening 305 in the middle of the second web 303, and the other end of the middle pull rod 804 is connected to the second brake beam 802. The middle pull rod 804 also moves the second brake beam 802 away from the cross beam 30. The rollers at both ends of the first brake beam 801 and the second brake beam 802 move along the slide groove 209 at the bottom end of the side beam 20 in the direction away from the cross beam 30. In other words, the brake shoes 805 move toward the wheels 103 corresponding to themselves, lock with the wheels 103, and prevent the wheels 103 from continuing to rotate.

[0137] In order to meet the requirements of high axle load and high speed, some bogies require special parts for various accessories such as wheelset 10, bearing 102, brake device, lower side bearing 306, etc. However, the bogie of this embodiment can be applied to engineering vehicles. Since engineering vehicles have lower requirements for their axle load and speed, and only need to meet the requirements of 14t axle load and 100km / h running speed, standard accessories can be used, and the accessories are highly interchangeable, which can reduce manufacturing costs and later maintenance costs.

[0138] This embodiment provides a welded frame bogie, in which the lower side bearing 306 and the lower center plate 701 on the bogie are connected with the upper side bearing and the upper center plate on the car body, so that the weight of the car body is transmitted to the frame, the primary suspension device 40, the load-bearing saddle 50, the bearing 102, the axle 101 and the wheel 103 in sequence through the lower side bearing 306 and the lower center plate 701, and finally transmitted to the track through the wheel 103. The traction device of the rail train generates traction on the bogie, and the wheelset 10 of the bogie rotates relative to the track, and the bogie and the car body thereon move in the direction of the traction. During the movement of the car body, the steel spring 401 and the rubber pile spring in the primary suspension device 40 are deformed, which plays a role in shock absorption and buffering. By designing different holes 408, the three-dimensional stiffness of the primary suspension device 40 of the bogie is reasonably matched, so that it can have good running quality in both empty and loaded states. When deceleration or parking is required, the braking device will transmit and amplify the braking force to each brake shoe 805, so that the brake shoe 805 presses the wheel 103 and locks the wheel 103, thereby generating a braking effect.

[0139] In addition, this embodiment also provides a rail train, comprising at least a brake device and the welded frame bogie in the above embodiment. The brake cylinder of the rail train generates a braking force, which is transmitted to the brake shoe 805 through the brake device, so that the brake shoe 805 and the wheel 103 are locked, preventing the wheel 103 from continuing to rotate.

[0140] In this embodiment, a car body is also included, which is connected to the bogie through the upper side bearings and upper center plate at the bottom of the car body and the lower side bearings 306 and lower center plate 701 at the top of the bogie, and transmits the load of the car body to the bogie.

[0141] This embodiment provides a rail train, in which a traction device generates traction force on the bogie and the car body, and the wheelset 10 of the bogie rotates relative to the track, and the bogie and the car body thereon move in the direction of the traction force. During the movement of the car body, the steel spring 401 and the rubber spring in the primary suspension device 40 are deformed, which plays a role in shock absorption and buffering. By designing different holes 408, a reasonable match of the three-dimensional stiffness of the primary suspension device 40 of the bogie is achieved, so that the running quality can be good in both empty and loaded states. When deceleration or parking is required, the braking device will transmit and amplify the braking force to each brake shoe 805, so that the brake shoe 805 presses the wheel 103 and locks the wheel 103, thereby generating a braking effect.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welded frame bogie, characterized in that: include: Two sets of wheels arranged in parallel and at intervals, two side beams arranged in parallel and at intervals, and a cross beam located between the side beams, wherein two ends of the cross beam are respectively connected to the middle of the two side beams; The two ends of the wheelset are rotatably located on the bottom surfaces of the two side beams, and the cross beam is located between the two groups of wheelsets; The side beam is a single-web box-type structure, and the side beam includes a first cover plate and a first bottom plate that are spaced apart, and a first web plate located between the first cover plate and the first bottom plate, and the first web plate is connected to the middle of the first cover plate and the first bottom plate; The wheelset comprises an axle, two bearings and two wheels, the two bearings and the two wheels are respectively located at two ends of the axle, and the bearings are located on the outside of the wheels, and the bearings are arranged facing the bottom surfaces of the two ends of the side beams; The welded frame bogie further comprises a primary suspension device, which is located between the side beam and the bearing, and sleeves are provided in the middle of both ends of the side beam, the sleeves are located above the bearing and sleeved on the outside of the primary suspension device, so as to fix the primary suspension device between the side beam and the bearing; The primary suspension device further comprises a steel spring and a rubber pile spring, wherein the rubber pile spring is inserted into the steel spring; The rubber pile spring comprises a base and a cone column, the base has a channel running from the top surface through the bottom surface, part of the cone column is inserted into part of the channel from the top of the base, the area enclosed by the inner wall of the channel gradually increases in the direction away from the bearing, and the area enclosed by the outer wall of the cone column gradually increases in the direction away from the bearing, and the base and the cone column are connected together by rubber vulcanization; The welded frame bogie further comprises a load-bearing saddle, the load-bearing saddle is located between the primary suspension device and the bearing, the load-bearing saddle has a platform on one side away from the bearing, the platform has a protrusion on one side away from the bearing, the protrusion extends into the bottom end of the channel, and the bottom surface of the base abuts against the top surface of the platform; The welded frame bogie also includes an upper cover, which is located at the top end of the sleeve, and a first protrusion is provided on the side of the upper cover facing the bearing, and a second protrusion is provided on the side of the first protrusion facing the bearing, the first protrusion extends into the steel spring, and the second protrusion extends into the groove at the top end of the cone column.

2. The welded frame bogie according to claim 1, characterized in that: The rubber on both lateral sides and the bottom side of the cone column has holes.

3. The welded frame bogie according to any one of claims 1-2, characterized in that: It also includes a lower center plate, which is used for rotationally connecting with the vehicle body, and the lower center plate is a plane center plate or a spherical center plate.

4. A rail train, characterized in that: The invention comprises at least a braking device and a welded frame bogie as described in any one of claims 1 to 3.

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