A bogie frame

Abstract

The present invention discloses a bogie frame, comprising two side beams arranged side by side and two crossbeams arranged between the two side beams. Both ends of the crossbeams are connected to the side beams via mounting assemblies. The mounting assemblies include an inner sleeve and an outer sleeve arranged around the inner sleeve and fixed to the longitudinal beams via fasteners. A rubber layer is provided between the inner and outer sleeves. Both ends of the crossbeams are provided with annular limiters located inside the side beams. The end of the outer sleeve facing the inside of the side beams is provided with a boss extending along the axial direction of the outer sleeve to the position of the limiter. The limiter is provided with a clearance groove corresponding to the position of the boss. Gaps are provided between the side walls of the clearance groove and the boss, and between the bottom wall of the clearance groove and the boss. The present invention limits the lateral, vertical, and longitudinal displacement of the elastic suspension, thereby limiting the maximum torsion angle between the crossbeam and the side beams.

Description

Technical Field

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

[0002] The bogie frame is the main structural load-bearing component. Existing bogie frames typically consist of integrally welded or cast side and cross beams, each equipped with numerous mounting brackets for various equipment. However, irreparable damage to any part of this structure renders the entire frame useless. Furthermore, the frame is typically required to have a lifespan equal to that of the entire vehicle, typically around 30 years. This places extremely high demands on its reliability and incurs significant R&D and testing costs. Furthermore, due to its large size and weight, transporting the frame is difficult and costly, especially for international and rapid transport.

[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, resulting in an increase in wheelbase, difficulty in lightweight design and complex structural design.

[0004] Chinese invention patent CN103241258B discloses a bogie frame, which includes two side beams and two cross beams; the two ends of the two cross beams are respectively 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; the rubber joints are internally provided with an annular 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, as well as the outer rings of the side beams and the rubber joints, all adopt a gapless fit, and the gapless fit includes an interference fit; however, the rubber joints disclosed in this patent cannot limit the torsional 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 that can effectively limit 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:

[0007] The cam is secured to the side of the vehicle frame by means of a spring, and the cam is secured to the side of the vehicle frame by means of a spring.

[0008] Therefore, the maximum torsional 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 limiter, thereby limiting the vertical and longitudinal displacements between the crossbeam and the side beams. The fit between the limiter and the mounting assembly can limit the lateral displacement between the crossbeam and the side beams. The mounting assembly provides limiting protection while elastically connecting the crossbeam and the side beams, thereby providing a certain lateral, vertical, torsional and deflection stiffness between the crossbeam and the side beams. At the same time, it is unnecessary to design an elastic suspension structure for the components hung on the crossbeam, thereby saving space and mass of the bogie frame.

[0009] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0010] In order to limit the displacement distance between the crossbeam and the side beam, and to provide elastic connection and limited protection between the crossbeam and the side beam, a vertical gap Z is provided between the lower surface of the boss and the bottom wall of the clearance groove, and a longitudinal gap X is provided between the side surface of the boss and the two side walls of the clearance groove; the vertical gap Z is the maximum relative vertical movement distance allowed between the crossbeam and the side beam, and the longitudinal gap X is the maximum relative longitudinal movement distance allowed between the crossbeam and the side beam.

[0011] Furthermore, the ports of the outer ring sleeve and the inner ring sleeve are flush, and there is a transverse distance 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 distance Y is the maximum relative transverse movement distance allowed between the crossbeam and the side beam.

[0012] Therefore, when the crossbeam moves relative to the side beam in the vertical direction (perpendicular to the upper surface of the frame), the lower surface of the boss of the outer ring sleeve will contact the bottom wall of the clearance groove of the limiting part, thereby limiting the vertical displacement between the crossbeam and the side beam; when the crossbeam moves relative to the side beam in the longitudinal direction (the extension direction of the side beam), the side wall of the boss of the outer ring sleeve will contact the side wall of the clearance groove, thereby limiting the longitudinal displacement between the crossbeam and the side beam; when the crossbeam moves relative to the side beam in the transverse direction (the extension direction of the crossbeam), 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 limiting part, thereby limiting the transverse displacement between the crossbeam and the side beam.

[0013] In order to reduce the overall rotational torque and wheel-rail lateral force of the bogie, the crossbeam further includes an arc-shaped first beam body located in the middle of the crossbeam, and a straight second beam body is provided 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.

[0014] 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 side beams, and the second beam body is connected and fixed to the side beams through an installation component.

[0015] Thus, the first beam bodies of the two cross beams are respectively arranged to protrude in the extension direction of the side beam at the midpoint position of the side beam. The bent cross beam and the side beam are obliquely connected 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 a curved section, which is beneficial to reducing the rotational torque and the wheel-rail lateral force.

[0016] The connection method between the mounting assembly and the end of the crossbeam 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.

[0017] Furthermore, end plates are provided at both ends of the beam, the first cylinder is sleeved on the end of the 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.

[0018] 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 provided on the outer surface of the side beam, and the second bolt is fixedly connected to the mounting seat.

[0019] Thus, the split crossbeams 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.

[0020] Furthermore, the limiting member includes an annular supporting portion and an annular stopping portion arranged on the outer ring of the supporting portion and extending toward the mounting assembly; the radius of the limiting member is the same as the radius of the outer ring sleeve.

[0021] 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.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) The bogie frame of the present invention, through the coordinated structural design of the mounting assembly with the crossbeam steel tube and the frame side beams, can limit the lateral, vertical, and longitudinal displacement of the elastic suspension, restricting the maximum torsion angle between the crossbeam and the side beams, which is beneficial for the motion interference analysis of the bogie components.

[0024] 2) The bogie frame of the present invention is connected obliquely to the side beams through the mounting assembly through the bent crossbeams and the outward convex arrangement of the two bent crossbeams, 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 rotational torque and the wheel-rail lateral force.

[0025] 3) The bogie frame of the present invention adopts seamless steel pipe as the main structure of the crossbeam and provides mounting components on both sides of the frame crossbeam, so that the frame crossbeam body becomes an elastic suspension component. The components attached to the frame crossbeam can use a rigid mounting structure, thereby achieving the overall purpose of saving space and reducing weight.

[0026] 4) The bogie frame of the present invention is made into a multi-component assembly structure by using a split crossbeam, 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

[0027] Figure 1 It is an isometric structural diagram of the bogie frame of the present invention;

[0028] Figure 2 1 is a schematic diagram of the top view of the bogie frame of the present invention;

[0029] Figure 3 yes Figure 2 Cross-sectional view in CC direction;

[0030] Figure 4 yes Figure 2 Cross-sectional view in the middle DD direction;

[0031] Figure 5 yes Figure 2 A partial enlarged view of the M in the middle;

[0032] Figure 6 It is an isometric structural diagram of the installation components in the bogie frame of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the crossbeam in the bogie frame of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the side beam of the present invention.

[0035] In the figure

[0036] 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; 312-first mounting plate; 32-outer sleeve; 321-boss; 322-second cylinder; 323-second mounting plate; 33-rubber layer; 4-limiting member; 41-clearance groove; 42-support part; 43-stop part; 5-first bolt; 6-second bolt; 7-mounting seat. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0038] like Figure 1-Figure 5 、 Figure 8As 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 beams 2 are connected to the side beams 1 via mounting assemblies 3. Both ends of the cross beams 2 are provided with annular stoppers 4 located inside the side beams 1. The cross beam 2 includes a first curved beam body 21 located in the middle of the cross beam 2. Straight second beam bodies 22 are provided at both ends of the first beam body 21. The second beam bodies 22 extend tangentially to the first beam body 21. The two cross beams 2 are arranged opposite each other, arranged in a bracket-like manner between the two side beams 1. The second beam bodies 22 are connected and fixed to the side beams 1 via the mounting assembly 3. The mounting assembly 3, the stoppers 4, and the second beam bodies 22 are axially aligned. The cross beams 2 are curved in the middle, so that the axial direction of the mounting assembly 3 tends to align with the rotation direction of the vehicle body relative to the bogie when the vehicle traverses a curved section, which helps reduce rotational torque and wheel-rail lateral forces.

[0039] like Figure 7 As shown in the figure, the middle part of the frame crossbeam 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 crossbeam 2 is convex outward in the direction shown in the figure. Then, 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 reducing the rotation torque and the wheel-rail lateral force.

[0040] The bogie frame of this embodiment utilizes a split crossbeam 2, creating a multi-component assembly structure. This reduces the risk of local damage leading to overall failure. Furthermore, each component can be transported separately, providing a wider range of transportation options and significantly reducing transportation costs. The crossbeam 2 of this embodiment utilizes seamless steel pipe as its main structure, and mounting assemblies 3 are provided on either side of the crossbeam, making the crossbeam 2 itself an elastically suspended component. Components attached to the crossbeam can then utilize rigid mounting structures, achieving overall space savings and weight reduction.

[0041] like Figures 1-6 As shown, the mounting assembly 3 includes an inner ring sleeve 31 connected and fixed to the cross beam 2 by fasteners, and an outer ring sleeve 32 connected and fixed to the side beam by fasteners, and a rubber layer 33 is provided between the inner ring sleeve 31 and the outer ring sleeve 32.

[0042] 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, and the second cylinder 322 is provided with the boss 321 at one end facing the inner side of the side beam 1 and a second mounting plate 323 at one end facing the outer side beam 1.

[0043] End plates 23 are provided at both ends of the crossbeam 2, the first cylinder 311 is sleeved on the end of the crossbeam 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.

[0044] In this embodiment, the outer sleeve 32 of the mounting assembly 3 forms a hole-shaft fit with the side beam 1, which can be selected from an interference fit, transition fit, or clearance fit depending on the process, with an interference fit being preferred. The inner sleeve 31 forms a hole-shaft fit with the cross beam 2, and the inner sleeve 31 is bolted to the transverse end plate 23 via a first mounting plate 312 welded to the end facing the outside of the side beam, thus forming an integral part of the inner sleeve 3 and cross beam 2. The outer sleeve 32 is bolted to the mounting seat 7, thus forming an integral part of the outer sleeve 32 and the side beam.

[0045] like Figures 1-6 As shown, the outer ring sleeve 32 is provided with a boss 321 extending along the axial direction of the outer ring sleeve 32 to the position of the limit member 4 at one end thereof facing the inner side of the side beam 1, and two bosses 321 are provided opposite to each other along the circumferential direction of the outer ring sleeve 32. The limit member 4 is provided with two clearance grooves 41 corresponding to the positions of the bosses 321, and the clearance grooves 41 are clearance-fitted with the bosses 321.

[0046] There is a vertical gap Z between the lower surface of the boss 321 and the bottom wall of the clearance groove 41, and there is a longitudinal gap X between the side surface of the boss 321 and the two side walls of the clearance groove 41; the vertical gap Z is the maximum relative vertical movement distance allowed between the crossbeam 2 and the side beam 1, and the longitudinal gap X is the maximum relative longitudinal movement distance allowed between the crossbeam 2 and the side beam 1; the ports of the outer ring sleeve 32 and the inner ring sleeve 31 are flush, and there is a transverse 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 transverse spacing Y is the maximum relative transverse movement distance allowed between the crossbeam 2 and the side beam 1.

[0047] like Figure 4 、 Figure 5As shown, the cooperation between the boss 321 at the end of the outer ring sleeve 32 and the limiter 4 limits the maximum torsion angle between the crossbeam 2 and the side beam 1, limiting the lateral, vertical, and longitudinal displacement of the elastic suspension. This provides limited protection while elastically connecting the crossbeam 2 and the side beam 1. The mounting assembly 3 provides a certain degree of lateral, vertical, torsional, and deflection stiffness between the crossbeam and the side beam, eliminating the need for elastic suspension structures for components suspended from the crossbeam, thereby saving space and weight in the bogie frame. When the crossbeam 2 moves relative to the side 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 side beam 1; when the crossbeam 2 moves relative to the side beam 1 in the longitudinal direction of the extension direction of the side 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 side beam 1; when the crossbeam 2 moves relative to the side beam 1 in the transverse direction of 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 side beam 1.

[0048] like Figure 5 As shown, the limiting member 4 includes an annular support portion 42 and an annular stop portion 43 arranged on the outer ring of the support portion 42 and extending toward the mounting assembly; the radius of the limiting member 4 is the same as the radius of the outer ring sleeve 32.

[0049] The stopper 4 can be annularly welded to a common seamless steel pipe, which does 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 the horizontal, vertical, and longitudinal limits between the crossbeam and the side beam, limiting the rotation angle between the crossbeam 2 and the side beam 1.

[0050] 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 mounting assembly 3. The two bent crossbeams 2 are arranged outwardly, so that 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 a curved section, which is beneficial to reducing the rotational torque and wheel-rail lateral force. At the same time, the bogie frame uses seamless steel pipes as the main structure of the crossbeam 2 and sets mounting assemblies 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 mounting structure, thereby achieving the purpose of saving space and reducing weight overall. 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.

[0051] The contents illustrated 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 modifications of the present invention by those skilled in the art shall 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 assemblies (3), the mounting assembly (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 side beams via fasteners, a rubber layer (33) being arranged between the inner ring sleeve (31) and the outer ring sleeve (32), and 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), and 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: There is a vertical gap Z between the lower surface of the boss (321) and the bottom wall of the clearance groove (41), and there is a longitudinal gap X between the side surface of the boss (321) and the two side walls of the clearance groove (41); the vertical gap Z is the maximum relative vertical movement distance allowed between the crossbeam (2) and the side beam (1), and the longitudinal gap X is the maximum relative longitudinal movement distance allowed between the crossbeam (2) and the side beam (1).

3. The bogie frame according to claim 1, characterized in that: The ports of the outer ring sleeve (32) and the inner ring sleeve (31) are flush, and there is a transverse spacing Y between the end faces of the outer ring sleeve (32) and the inner ring sleeve (31) facing the limit member (4) and the limit member (4); the transverse spacing Y is the maximum relative transverse movement distance allowed between the crossbeam (2) and the side 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 linear second beam bodies (22) are provided 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 side beams (1). The second beam body (22) and the side beam (1) are connected and fixed via the mounting assembly (3). The mounting assembly (3) and the position 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) includes a first cylinder (311) and a first mounting plate (312); the outer ring sleeve (32) includes 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) includes an annular support portion (42) and an annular stop portion (43) arranged on the outer ring of the support 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 paving grooves (41) corresponding to the positions of the bosses (321) are formed on the limiting member (4).

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