Bogie frame

Abstract

The bogie frame comprises two side beams arranged side by side and two cross beams arranged between the two side beams, the two ends of each cross beam are connected with the side beams through installation assemblies, and each installation assembly comprises an inner ring sleeve and an outer ring sleeve which is arranged on the periphery of the inner ring sleeve and fixedly connected with a longitudinal beam through a fastener. A rubber layer is arranged between the inner ring sleeve and the outer ring sleeve, and annular limiting pieces located on the inner sides of the side beams are arranged at the two ends of the cross beams; a boss extending to the position of the limiting piece in the axial direction of the outer ring sleeve is arranged at the end, facing the inner side of the side beam, of the outer ring sleeve, and a receding groove corresponding to the boss in position is formed in the limiting piece. Gaps are formed between the side wall of the receding groove and the boss and between the bottom wall of the receding groove and the boss. The transverse, vertical and longitudinal displacement of the elastic suspension is limited, and the maximum torsion angle between the cross beam and the side beam is limited.

Description

Technical Field

[0001] The invention relates to a bogie frame, belonging to the technical field of rail vehicle bogies. Background Art

[0002] The frame is the main structural load-bearing component of the bogie. Existing frames are generally integrally welded or cast structures of side beams and cross beams, and there are many mounting seats on the side beams and cross beams for the installation of various equipment. However, if a part of the structure of such a frame is damaged and cannot be repaired, the entire frame will be scrapped. In addition, the frame is generally required to have the same life as the vehicle, which generally reaches about 30 years. This leads to extremely high reliability requirements for the frame, and the R&D and testing costs are also very high. In addition, due to the large overall size and weight, especially when cross-border and fast transportation is required, the frame transportation is more difficult and the transportation cost is very high.

[0003] In addition, elastic rubber joints will be installed on the frame beams to hang equipment to achieve the purposes of cushioning, vibration reduction and improving dynamic performance. However, most independent rubber joints take up more space and weight, which increases the wheelbase, makes lightweight design difficult, and complicates the structural design.

[0004] Chinese invention patent CN103241258B discloses a bogie frame, which includes two side beams and two cross beams; both ends of the two cross beams are connected to the side beams in an axially fixed manner via rubber joints, and the wheelbase is greater than the longitudinal spacing between the two cross beams; wherein the rubber joints adopt a circular rubber layer structure; the axial fixing method includes: the rubber joints are axially fixed by cross beam shoulders, side beam through-hole end faces, spacer rings and cover plates; the inner rings of the cross beams and the rubber joints and the outer rings of the side beams and the rubber joints are all gap-free, and the gap-free fit includes an interference fit; however, the rubber joints disclosed in this patent cannot limit the torsion angle between the cross beams and the side beams, and the axial, radial, torsional and deflection stiffness of the rubber joints are all very large. Summary of the invention

[0005] The present invention aims to solve the above technical problems and provide a bogie frame capable of effectively limiting the torsion angle between the cross beam and the side beam.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A bogie frame comprises two side beams arranged side by side and two cross beams arranged between the two side beams, both ends of the cross beams are connected to the side beams through a mounting assembly, the mounting assembly comprises an inner ring sleeve connected and fixed to the cross beam by a fastener, and an outer ring sleeve arranged at the outer periphery of the inner ring sleeve and connected and fixed to the longitudinal beam by a fastener, a rubber layer is arranged between the inner ring sleeve and the outer ring sleeve, both ends of the cross beam are provided with an annular limit piece located on the inner side of the side beam; a boss extending along the axial direction of the outer ring sleeve to the position of the limit piece is provided on the end of the outer ring sleeve facing the inner side of the side beam, and a clearance groove corresponding to the position of the boss is opened on the limit piece; there are gaps between the side wall of the clearance groove and the boss, and between the bottom wall of the clearance groove and the boss.

[0007] Therefore, the maximum torsion angle between the crossbeam and the side beam is limited by the clearance fit between the boss at the end of the outer ring sleeve and the limit piece, thereby limiting the vertical and longitudinal displacements between the crossbeam and the side beam. The fit between the limit piece and the mounting assembly can limit the lateral displacement between the crossbeam and the longitudinal beam. The mounting assembly provides limit protection while elastically connecting the crossbeam and the side beam, thereby providing a certain lateral, vertical, torsional and deflection stiffness between the crossbeam and the side beam. At the same time, it is unnecessary to design an elastic suspension structure for the components suspended on the crossbeam, thereby saving space and mass of the bogie frame.

[0008] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization: In order to limit the displacement distance between the crossbeam and the longitudinal beam, and to provide limited protection while elastically connecting the crossbeam and the side beam, further, a vertical gap Z is provided between the lower surface of the boss and the bottom wall of the give-way groove, and a longitudinal gap X is provided between the side surface of the boss and the two side walls of the give-way groove; the vertical gap Z is the maximum relative vertical movement distance allowed between the crossbeam and the longitudinal beam, and the longitudinal gap X is the maximum relative longitudinal movement distance allowed between the crossbeam and the longitudinal beam.

[0009] Furthermore, the ports of the outer ring sleeve and the inner ring sleeve are flush, and there is a transverse spacing Y between the end surfaces of the outer ring sleeve and the inner ring sleeve facing the limit member and the limit member; the transverse spacing Y is the maximum relative transverse movement distance allowed between the crossbeam and the longitudinal beam.

[0010] Therefore, when the crossbeam moves in the vertical direction (perpendicular to the upper surface of the frame) relative to the longitudinal beam, the lower surface of the boss of the outer ring sleeve will contact the bottom wall of the stop groove of the limiting member, thereby limiting the vertical displacement between the crossbeam and the longitudinal beam; when the crossbeam moves in the longitudinal direction (the extension direction of the longitudinal beam) relative to the longitudinal beam, the side wall of the boss of the outer ring sleeve will contact the side wall of the stop groove, thereby limiting the longitudinal displacement between the crossbeam and the longitudinal beam; when the crossbeam moves in the transverse direction (the extension direction of the crossbeam) relative to the longitudinal beam, the end of the outer ring sleeve and the inner ring sleeve close to the inner side of the side beam will contact the side of the stop member, thereby limiting the transverse displacement between the crossbeam and the longitudinal beam.

[0011] In order to reduce the overall rotational moment and wheel-rail lateral force of the bogie, further, the crossbeam includes an arc-shaped first beam body located in the middle of the crossbeam, and straight second beam bodies are arranged at both ends of the first beam body; the second beam body extends along the tangential direction of the first beam body, and the mounting assembly and the limit member are both in the same axial direction as the second beam body.

[0012] Furthermore, the two cross beams are arranged opposite to each other, and the two cross beams are arranged in a bracket shape between the two longitudinal beams, and the second beam body is connected and fixed to the longitudinal beam by a mounting assembly.

[0013] Thus, the first beam bodies of the two cross beams are respectively arranged to protrude in the extension direction of the longitudinal beam at the midpoint position of the longitudinal beam. The bent cross beam is obliquely connected to the side beam through the rubber elastic sleeve and the two bent cross beams are arranged outwardly, so that the axial direction of the rubber elastic sleeve tends to the rotation direction of the vehicle body relative to the bogie when the vehicle passes through the curved section, which is beneficial to reducing the rotation torque and the wheel-rail lateral force.

[0014] The connection method between the mounting assembly and the end of the cross beam is: further, the inner ring sleeve includes a first cylinder and a first mounting plate; the outer ring sleeve includes a second cylinder, and the second cylinder is provided with a boss at one end facing the inner side of the side beam and a second mounting plate at one end facing the outer side of the side beam.

[0015] Furthermore, end plates are provided at both ends of the cross beam, the first cylinder is sleeved on the end of the cross beam, the first mounting plate is detachably connected to the end plate by a first bolt, a mounting seat is fixedly provided on the outer surface of the side beam, and the second mounting plate is fixedly connected to the mounting seat by a second bolt.

[0016] Furthermore, the first mounting plate is a circular plate arranged on the inner surface of the first cylinder, and the second mounting plate is a square ring arranged on the outer surface of the second cylinder; a mounting seat is fixedly arranged on the outer surface of the side beam, and the second bolt is fixedly connected to the mounting seat.

[0017] Thus, the split crossbeam makes the frame a multi-component assembly structure, thereby reducing the risk of overall scrapping due to local damage. At the same time, each component is transported separately, with more transportation options and greatly reduced transportation costs.

[0018] Furthermore, the limiting member includes an annular supporting portion, and an annular stopping portion which is arranged on the outer ring of the supporting portion and extends in the direction of the mounting assembly; the radius of the limiting member is the same as the radius of the outer ring sleeve.

[0019] Furthermore, a plurality of bosses are provided along the circumferential direction of the outer ring sleeve, and a plurality of clearance grooves corresponding to the positions of the bosses are formed on the limiting member.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1) The bogie frame of the present invention can limit the lateral, vertical and longitudinal displacements of the elastic suspension through the matching structural design of the mounting assembly with the crossbeam steel tube and the frame side beam, thereby limiting the maximum torsion angle between the crossbeam and the side beam, which is beneficial to the motion interference analysis of the bogie components.

[0021] 2) The bogie frame of the present invention is connected obliquely through the bent crossbeam and the side beam through the mounting assembly and the two bent crossbeams are arranged outwardly, so that the axial direction of the mounting assembly tends to the rotation direction of the vehicle body relative to the bogie when the vehicle passes through a curved section, which is beneficial to reducing the rotation torque and wheel-rail lateral force.

[0022] 3) The bogie frame of the present invention adopts seamless steel pipe as the main structure of the crossbeam and sets installation components on both sides of the frame crossbeam, so that the frame crossbeam body becomes an elastic suspension component, and the components attached to the frame crossbeam can use a rigid installation structure, thereby achieving the purpose of saving space and reducing weight as a whole.

[0023] 4) The bogie frame of the present invention uses a split crossbeam to make the frame a multi-component assembly structure, thereby reducing the risk of overall scrapping due to local damage. At the same time, each component is transported separately, with more transportation options and greatly reduced transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an isometric structural schematic diagram of the bogie frame of the present invention; Figure 2 It is a schematic diagram of the structure of the bogie frame of the present invention from a top view; Figure 3 yes Figure 2 Cross-sectional view in CC direction; Figure 4 yes Figure 2 Cross-sectional view in the middle DD direction; Figure 5 yes Figure 2 A partial enlarged view of the M in the middle; Figure 6 It is an isometric structural schematic diagram of the installation assembly in the bogie frame of the present invention; Figure 7 It is a structural schematic diagram of a crossbeam in a bogie frame of the present invention; Figure 8 It is a structural schematic diagram of the longitudinal beam of the present invention.

[0025] In the figure 1-side beam; 2-cross beam; 21-first beam body; 22-second beam body; 23-end plate; 3-mounting assembly; 31-inner sleeve; 311-first cylinder body; 312-first mounting plate; 32-outer sleeve; 321-boss; 322-second cylinder body; 323-second mounting plate; 33-rubber layer; 4-limiting member; 41-gap groove; 42-supporting part; 43-stopping part; 5-first bolt; 6-second bolt; 7-mounting seat. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0027] like Figure 1-Figure 5 , Figure 8 As shown, the bogie frame of this embodiment includes two side beams 1 arranged side by side and two cross beams 2 arranged between the two side beams 1. Both ends of the cross beam 2 are connected to the side beams 1 through a mounting assembly 3. Both ends of the cross beam 2 are provided with an annular stopper 4 located inside the side beam 1. The cross beam 2 includes an arc-shaped first beam body 21 located in the middle of the cross beam 2. Both ends of the first beam body 21 are provided with a straight second beam body 22; the second beam body 22 extends along the tangent direction of the first beam body 21; the two cross beams 2 are arranged opposite to each other, and the two cross beams 2 are arranged between the two longitudinal beams 1 in a bracket shape. The second beam body 22 is connected and fixed to the longitudinal beam 1 through the mounting assembly 3. The mounting assembly 3, the stopper 4 and the second beam body 22 have the same axial direction. At the same time, the middle part of the frame cross beam 2 is bent, so the axial direction of the mounting assembly 3 tends to the rotation direction of the vehicle body relative to the bogie when the vehicle passes through the curved section, which is conducive to reducing the rotation torque and wheel-rail lateral force.

[0028] like Figure 7As shown, the middle part of the frame cross beam 2 is an arc area, and the two ends are inclined straight sections, wherein the straight sections are connected to the frame side beams 1 through the mounting assembly 3. The middle part of the frame cross beam 2 is convex outward in the direction shown in the figure, and the axial direction of the rubber elastic sleeve 2 tends to the rotation direction of the vehicle body relative to the bogie when the vehicle passes through the curved section, which is beneficial to reduce the rotation torque and the wheel-rail lateral force.

[0029] The bogie frame of this embodiment uses a split crossbeam 2 to make the frame a multi-component assembly structure, thereby reducing the risk of overall scrapping due to local damage. At the same time, each component is transported separately, and more transportation methods are available, which greatly reduces transportation costs. The crossbeam 2 of this embodiment uses a seamless steel pipe as the main structure of the crossbeam, and mounting components 3 are arranged on both sides of the frame crossbeam, so that the frame crossbeam 2 body becomes an elastic suspension component, and the components attached to the frame crossbeam can use a rigid mounting structure, which generally achieves the purpose of saving space and reducing weight.

[0030] like Figure 1-Figure 6 As shown, the mounting assembly 3 includes an inner ring sleeve 31 connected and fixed to the cross beam 2 via fasteners, and an outer ring sleeve 32 connected and fixed to the longitudinal beam via fasteners, and a rubber layer 33 is provided between the inner ring sleeve 31 and the outer ring sleeve 32 .

[0031] The inner ring sleeve 31 includes a first cylinder 311 and a first mounting plate 312 ; the outer ring sleeve 32 includes a second cylinder 322 , wherein the boss 321 is provided at one end of the second cylinder 322 facing the inner side of the side beam 1 , and a second mounting plate 323 is provided at one end of the second cylinder 322 facing the outer side of the side beam 1 .

[0032] End plates 23 are provided at both ends of the cross beam 2, the first cylinder 311 is sleeved on the end of the cross beam 2, the first mounting plate 312 is detachably connected to the end plate 23 by a first bolt 5, a mounting seat 7 is fixedly provided on the outer surface of the side beam 1, and the second mounting plate 323 is fixedly connected to the mounting seat 7 by a second bolt 6; the first mounting plate 312 is a circular plate arranged on the inner surface of the first cylinder 311, and the second mounting plate 323 is a square ring arranged on the outer surface of the second cylinder 322.

[0033] The outer ring sleeve 32 of the mounting assembly 3 in this embodiment is hole-shaft matched with the side beam 1, and interference, transition or clearance fit can be selected according to the process, preferably interference fit, the inner ring sleeve 31 is hole-shaft matched with the cross beam 2, and the inner ring sleeve 31 is bolted to the transverse end plate 23 through the first mounting plate 312 welded to the end facing the outer side of the side beam, so that the inner ring sleeve 3 is integrated with the cross beam 2. The outer ring sleeve 32 is bolted to the mounting seat 7, and the outer ring sleeve 32 is bolted to the side beam to be integrated.

[0034] like Figure 1-Figure 6 As shown, one end of the outer ring sleeve 32 facing the inner side of the side beam 1 is provided with a boss 321 extending along the axial direction of the outer ring sleeve 32 to the position of the limiting member 4, and two relatively arranged bosses 321 are provided along the circumferential direction of the outer ring sleeve 32. The limiting member 4 is provided with two paving grooves 41 corresponding to the positions of the bosses 321, and the paving grooves 41 are clearance-matched with the bosses 321.

[0035] There is a vertical gap Z between the lower surface of the boss 321 and the bottom wall of the give way groove 41, and there is a longitudinal gap X between the side of the boss 321 and the two side walls of the give way groove 41; the vertical gap Z is the maximum relative vertical movement distance allowed between the crossbeam 2 and the longitudinal beam 1, and the longitudinal gap X is the maximum relative longitudinal movement distance allowed between the crossbeam 2 and the longitudinal beam 1; the ports of the outer ring sleeve 32 and the inner ring sleeve 31 are flush, and there is a lateral spacing Y between the end surfaces of the outer ring sleeve 32 and the inner ring sleeve 31 facing the limit member 4 and the limit member 4; the lateral spacing Y is the maximum relative lateral movement distance allowed between the crossbeam 2 and the longitudinal beam 1.

[0036] like Figure 4 , Figure 5 As shown, the maximum torsion angle between the cross beam 2 and the side beam 1 is limited by the cooperation between the boss 321 at the end of the outer ring sleeve 32 and the limiter 4, so as to limit the lateral, vertical and longitudinal displacement of the elastic suspension, and provide limited protection while the cross beam 2 and the side beam 1 are elastically connected. The mounting assembly 3 provides a certain lateral, vertical, torsional and deflection stiffness between the cross beam and the side beam, so that the components hung on the cross beam do not need to be designed with an elastic suspension structure, thereby saving space and mass of the bogie frame. When the crossbeam 2 moves relative to the longitudinal beam 1 in the vertical direction perpendicular to the upper surface of the frame, the lower surface of the boss 321 of the outer ring sleeve 32 will contact the bottom wall of the clearance groove 41 of the limiting member 4, thereby limiting the vertical displacement between the crossbeam 2 and the longitudinal beam 1; when the crossbeam 2 moves relative to the longitudinal beam 1 in the longitudinal direction in the extension direction of the longitudinal beam, the side wall of the boss 321 of the outer ring sleeve 32 will contact the side wall of the clearance groove 41, thereby limiting the longitudinal displacement between the crossbeam 2 and the longitudinal beam 1; when the crossbeam 2 moves relative to the longitudinal beam 1 in the transverse direction in the extension direction of the crossbeam, the end of the outer ring sleeve 32 and the inner ring sleeve 31 close to the inner side of the side beam 1 will contact the side of the limiting member 4, thereby limiting the transverse displacement between the crossbeam 2 and the longitudinal beam 1.

[0037] like Figure 5 As shown, the limiting member 4 includes an annular supporting portion 42 and an annular stopping portion 43 which is arranged on the outer ring of the supporting portion 42 and extends toward the mounting assembly; the radius of the limiting member 4 is the same as the radius of the outer ring sleeve 32 .

[0038] The stopper 4 can be annularly welded on an ordinary seamless steel pipe, which will not add much weight and is more lightweight. The stopper 4 on the crossbeam 2 and the boss 321 at the end of the outer sleeve 32 form transverse, vertical and longitudinal limits between the crossbeam and the side beam, and limit the rotation angle between the crossbeam 2 and the longitudinal beam 1.

[0039] The crossbeam 2 of the bogie frame of this embodiment is bent, and the crossbeam 2 is obliquely connected to the side beam 1 through the installation component 3 and the two bent crossbeams 2 are arranged outwardly, so that the axial direction of the installation component 3 tends to the rotation direction of the vehicle body relative to the bogie when the vehicle passes through the curved section, which is beneficial to reduce the rotation torque and the wheel-rail lateral force. At the same time, the bogie frame adopts seamless steel pipes as the main structure of the crossbeam 2 and installs components on both sides of the frame crossbeam 2, so that the frame crossbeam body becomes an elastic suspension component, and the components attached to the frame crossbeam 2 can use a rigid installation structure, which generally achieves the purpose of saving space and reducing weight. The split crossbeam makes the frame a multi-component assembly structure, thereby reducing the risk of overall scrapping due to local damage. At the same time, each component is transported separately, and there are more transportation options, which greatly reduces transportation costs.

[0040] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

Claims

1. A bogie frame, comprising two side beams (1) arranged side by side and two cross beams (2) arranged between the two side beams (1), both ends of the cross beams (2) being connected to the side beams (1) via mounting components (3), the mounting components (3) comprising an inner ring sleeve (31) connected and fixed to the cross beams via fasteners and an outer ring sleeve (32) arranged on the outer periphery of the inner ring sleeve (31) and connected and fixed to the longitudinal beams via fasteners, a rubber layer (33) being arranged between the inner ring sleeve (31) and the outer ring sleeve (32), characterized in that: Both ends of the cross beam (2) are provided with an annular limiting member (4) located on the inner side of the side beam (1); one end of the outer ring sleeve (32) facing the inner side of the side beam (1) is provided with a boss (321) extending along the axial direction of the outer ring sleeve (32) to the position of the limiting member (4); the limiting member (4) is provided with a clearance groove (41) corresponding to the position of the boss (321); there is a gap between the side wall of the clearance groove (41) and the boss (321), and between the bottom wall of the clearance groove (41) and the boss (321).

2. The bogie frame according to claim 1, characterized in that: A vertical gap Z is provided between the lower surface of the boss (321) and the bottom wall of the clearance groove (41), and a longitudinal gap X is provided between the side surface of the boss (321) and both side walls of the clearance groove (41); the vertical gap Z is the maximum relative vertical movement distance allowed between the cross beam (2) and the longitudinal beam (1), and the longitudinal gap X is the maximum relative longitudinal movement distance allowed between the cross beam (2) and the longitudinal beam (1).

3. The bogie frame according to claim 1 or 2, characterized in that: The ports of the outer ring sleeve (32) and the inner ring sleeve (31) are flush, and a transverse spacing Y is provided between the end surfaces of the outer ring sleeve (32) and the inner ring sleeve (31) facing the limiting member (4) and the limiting member (4); the transverse spacing Y is the maximum relative transverse movement distance allowed between the crossbeam (2) and the longitudinal beam (1).

4. The bogie frame according to claim 1, characterized in that: The crossbeam (2) comprises an arc-shaped first beam body (21) located in the middle of the crossbeam (2), and straight second beam bodies (22) are arranged at both ends of the first beam body (21); the second beam body (22) extends along a tangent direction of the first beam body (21).

5. The bogie frame according to claim 4, characterized in that: The two cross beams (2) are arranged opposite to each other, and the two cross beams (2) are arranged in a bracket-shaped manner between the two longitudinal beams (1). The second beam body (22) is connected and fixed to the longitudinal beam (1) via the mounting assembly (3), and the mounting assembly (3) and the limiting member (4) are all in the same axial direction as the second beam body (22).

6. The bogie frame according to any one of claims 1 to 5, characterized in that: The inner ring sleeve (31) comprises a first cylinder (311) and a first mounting plate (312); the outer ring sleeve (32) comprises a second cylinder (322), and a second mounting plate (323) is provided at one end of the second cylinder (322) facing the outside of the side beam (1).

7. The bogie frame according to claim 6, characterized in that: End plates (23) are provided at both ends of the cross beam (2); the first cylinder (311) is sleeved on the end of the cross beam (2); the first mounting plate (312) is detachably connected to the end plate (23) via a first bolt (5); a mounting seat (7) is fixedly provided on the outer surface of the side beam (1); and the second mounting plate (323) is fixedly connected to the mounting seat (7) via a second bolt (6).

8. The bogie frame according to claim 6, characterized in that: The first mounting plate (312) is a circular plate arranged on the inner surface of the first cylinder (311), and the second mounting plate (323) is a square ring arranged on the outer surface of the second cylinder (322).

9. The bogie frame according to claim 1, characterized in that: The limiting member (4) comprises an annular supporting portion (42) and an annular stopping portion (43) arranged on the outer ring of the supporting portion (42) and extending in the direction of the mounting assembly; the radius of the limiting member (4) is the same as the radius of the outer ring sleeve (32).

10. The bogie frame according to claim 1, characterized in that: A plurality of bosses (321) are provided along the circumferential direction of the outer ring sleeve (32), and a plurality of clearance grooves (41) corresponding to the positions of the bosses (321) are formed on the limiting member (4).

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