Magnetic track brake fixing hanging seat suitable for urban rail vehicle bogie

Abstract

The invention provides a magnetic track brake fixing hanging seat suitable for a bogie of an urban rail vehicle, the magnetic track brake fixing hanging seat comprises a mounting part, a bearing part and a rod body, the mounting part and the bearing part are connected to two sides of the rod body, the mounting part is connected with one side end part of an axle box body through a locking structure, the bearing part is connected with a magnetic track brake, and the rod body is of a variable cross-section and bent structure. The magnetic track brake fixing hanging seat is convenient to mount, dismount and the like, the working efficiency is improved, the structural design is reasonable, structural sudden change is avoided, the stress concentration condition is reduced, and the fixing hanging seat is safer and more reliable under severe working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicles, and in particular to a magnetic rail brake fixing hanger suitable for a bogie of an urban rail vehicle. Background Art

[0002] The bogie magnetic rail brake fixed mount is the interface component between the magnetic rail brake and the axle box, which is used to support and fix the magnetic rail brake to ensure the braking ability of the vehicle. Since the magnetic rail brake has a long structure and a solidified interface, and the available space of the bogie is extremely limited, there are great restrictions on the form of the magnetic rail brake fixed mount. In addition, a large load will be applied to the fixed mount during driving. The existing magnetic rail brake fixed mount has poor vibration resistance and is easy to break, which affects the safety and reliability of the vehicle.

[0003] The straight rod hanger with right angle bending is made of Q235 steel, cast and pre-tightened with bolts and installed on the inside of the axle box. Figure 1 , 2 shown.

[0004] In the prior art, the clearance between the axle box and the wheelset is small and difficult to observe, making installation and replacement difficult. Figure 3 As shown. Secondly, the bolt fixing position is far from the force point, resulting in a greater torque under the vertical load and more susceptible to structural damage. In addition, the structure at the interface between the fixed hanger and the magnetic rail brake changes suddenly, resulting in stress concentration, which makes the interface prone to damage. Summary of the invention

[0005] According to the technical problems raised above, a magnetic rail brake fixing hanger suitable for a bogie of an urban rail vehicle is provided.

[0006] The technical means adopted by the present invention are as follows:

[0007] A magnetic rail brake fixing hanger suitable for a bogie of an urban rail vehicle comprises: a mounting portion, a bearing portion and a rod body, wherein the mounting portion and the bearing portion are connected at both sides of the rod body, the mounting portion is connected to one end of an axle box body through a locking structure, the bearing portion is connected to the magnetic rail brake, and the rod body is a variable cross-section, curved structure.

[0008] Furthermore, the rod body includes a first line segment 5-1, a second line segment 5-2 and a third line segment 5-3 which are connected in sequence, an end of the first line segment 5-1 away from the second line segment 5-2 is connected to the mounting portion 1, an end of the third line segment 5-3 away from the second line segment 5-2 is connected to the bearing portion 2, and the second line segment 5-2 is designed with a variable cross-section.

[0009] Furthermore, the two ends of the second line segment 5-2 are a fixed end and an interface end, the fixed end is connected to the first line segment 5-1, and the interface end is connected to the third line segment 5-3. The vertical height of the cross section of the second line segment 5-2 gradually converges to the interface end through the fixed end, and the lower surface of the side of the second line segment 5-2 connected to the third line segment 5-3 is a straight surface, and the upper surface is a horizontal surface.

[0010] Furthermore, the first line segment 5-1 is in a horizontal arc structure with an arc of 120-150 degrees;

[0011] The connection position between the third line segment 5 - 3 and the mounting portion 1 is the first connection point. The thickness direction of the third line segment 5 - 3 is widened at the first connection point, and the height direction is chamfered with a large arc.

[0012] Furthermore, the locking structure includes bolts and multiple bolt connection holes opened on the mounting part, and the mounting part and the bearing part are detachably connected through the bolts and the bolt connection holes. The multiple bolt connection holes are arranged in multiple rows with each row having at least two bolt connection holes.

[0013] Furthermore, the main body of the bearing part is formed by two connected arcs of different radii on the plane, the radius of the large arc is 35-45mm, and the radius of the small arc is 25-35mm; the bearing part is provided with a magnetic rail brake interface that cooperates with the magnetic rail brake, and the magnetic rail brake interface is a variable thickness frustum interface structure.

[0014] Furthermore, the variable thickness frustum interface structure includes a circular groove opened on one side of the upper surface of the bearing part, the circular groove does not penetrate the bearing part, and a through hole is opened through the center of the circular groove.

[0015] Furthermore, the diameter of the circular groove is 13-16 mm.

[0016] Furthermore, the bearing portion has a thickness of 25-30 mm.

[0017] Furthermore, the fixed hanger is an integrated structure made of 42CrMo material through casting.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention makes installation and disassembly of the magnetic rail brake fixing bracket easy and improves work efficiency. The structural design is reasonable, there is no structural mutation, stress concentration is reduced, and it is safer and more reliable under harsh working conditions.

[0020] 2. The rod body of the present invention adopts a variable cross-section structure, which solves the problem that the rod body design space is limited in a small space and the straight rod cannot ensure strength, thereby avoiding stress concentration.

[0021] 3. The rod body of the present invention adopts an inclined and curved structure to connect the installation side and the load-bearing side. The connection is completed when the connection position has been determined and cannot be adjusted. At the same time, the structure is lightweight without adding too much weight and the structural strength is guaranteed.

[0022] 4. The interface of the magnetic rail brake of the present invention is designed as a variable thickness frustum interface, which ensures the uniformity of the interface and the structural strength under the contradictory conditions that the interface of the magnetic rail brake is extremely small and the rod body size is relatively large.

[0023] 5. The present invention realizes connection at the longitudinal end face of the axle box for the first time, adopts bolt fasteners, which is simple and efficient, and the bolt arrangement method has a high safety margin and good earthquake resistance.

[0024] Based on the above reasons, the present invention can be widely promoted in the fields of rail vehicles and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, 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 labor.

[0026] Figure 1 The present invention is a schematic diagram of an existing right-angle bent straight rod hanger installed on the inner side of an axle box.

[0027] Figure 2 The present invention is a schematic diagram of the structure of an existing straight rod hanger with a right-angle bend.

[0028] Figure 3 This is a schematic diagram of the assembly of the existing axle box and wheelset.

[0029] Figure 4 It is a schematic diagram of the connection between the fixed hanger and the axle box body and one side of the magnetic rail brake of the present invention.

[0030] Figure 5 It is a side view of the fixed hanger of the present invention.

[0031] Figure 6 It is another side view of the fixed hanger of the present invention.

[0032] Figure 7 It is a schematic diagram of the connection between the fixed hanger, the axle box and the magnetic rail brake of the present invention.

[0033] Figure 8 It is a schematic diagram of the static strength analysis of the present invention.

[0034] Fig. 9 It is another schematic diagram of the static strength analysis of the present invention.

[0035] Fig.10 It is a schematic diagram of the quasi-static fatigue strength analysis of the present invention.

[0036] In the figure: 01, fixed hanger; 02, axle box; 03, magnetic rail brake; 1, mounting part; 2, bearing part; 3, bolt connection hole; 4, magnetic rail brake interface; 5, rod body; 5-1, first line segment; 5-2, second line segment; 5-3, third line segment. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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 only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0041] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0042] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0043] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0044] Example 1

[0045] The present invention provides a magnetic rail brake fixing hanger suitable for urban rail vehicle bogies, which can solve the problems of difficult installation and disassembly, insufficient structural strength, stress concentration, etc. in the prior art. The following performance can be mainly achieved: static strength and quasi-static fatigue strength verification meet the requirements of standard BS EN 13749.

[0046] The present invention provides a reliable magnetic rail brake fixed hanger, the fixed hanger 01 is an integrated structure, made of 42CrMo material, and cast. The fixed hanger 01 is provided with a bolt connection hole, a magnetic rail brake interface, and a fixed hanger rod body, and is installed at the end of the axle box 02 by bolt pre-tightening. Figures 4 to 6 As shown, specifically including:

[0047] The bolt connection hole 3 is provided on the mounting portion 1 of the fixed hanger 01 and is used for pre-tightening the connection with the end of the axle box body 02 by bolts;

[0048] The magnetic rail brake interface 4 is arranged on the bearing part 2 of the fixed hanger 01. To ensure the overall strength of the fixed hanger 01, the thickness is 24mm, and a 14mm round table is polished at the interface for connecting with the magnetic rail brake 03;

[0049] The fixed hanger rod body 5, the axle box body 02 and the magnetic rail brake 03 are connected to the main part. Since the reserved interface size of the magnetic rail brake 03 is small, on the basis of ensuring the structural strength requirements, the rod body 5 adopts a variable cross-section and bending angle.

[0050] One end of the magnetic rail brake fixing bracket of the present invention is fixed to the end of the axle box body 02, and the other end is connected to the magnetic rail brake 03. Figure 7 As shown. Since the reserved interface size of the magnetic track brake 03 is fixed, the present invention designs a variable thickness truncated cone interface based on the consideration of the overall strength. The other end is connected to the axle box 02 with bolts. Considering the convenience of installation and disassembly of the magnetic track brake 03, the connection position is set at the end of the axle box 02.

[0051] Example 2

[0052] The present invention discloses a magnetic rail brake fixing seat suitable for a bogie of an urban rail vehicle, comprising a mounting portion 1, a bearing portion 2 and a rod body 5, wherein the mounting portion 1 and the bearing portion 2 are connected on both sides of the rod body 5, and the mounting portion 1 is connected to one end of the axle box body 02, wherein the mounting portion 1 is provided with four bolt connection holes 3, the four bolt connection holes 3 are arranged in two rows at intervals, and each row has two bolt connection holes 3, and the bolt connection holes 3 are matched with connecting bolts, and the mounting portion 1 and the bearing portion 2 are detachably connected by the bolts and the bolt connection holes 3. The body of the bearing portion 2 is formed by connecting two arcs of different radii on a plane, the large arc radius is 35-45mm, and the small arc radius is 25-35mm. The bearing portion 2 is provided with a magnetic rail brake interface 4 that is connected with the magnetic rail brake 03, and the magnetic rail brake interface 4 is a variable thickness truncated cone interface structure, and the variable thickness truncated cone interface structure includes a circular groove opened on one side (large arc side) of the upper surface of the bearing portion 2, the circular groove does not penetrate the bearing portion 2, and a through hole is opened in the center of the circular groove. The rod body 5 is a variable cross-section, curved structure. The rod body 5 is composed of a first line segment 5-1, a second line segment 5-2, and a third line segment 5-3 that are connected in sequence. The first line segment 5-1 is a line segment connecting the rod body 5 and the mounting portion 1, and the horizontal plane is in an arc shape, and the arc angle is 120-150 degrees. The second line segment 5-2 is the main body of the rod body 5, with a variable cross-section design. The two ends of the second line segment 5-2 are a fixed end and an interface end. The fixed end is connected to the first line segment 5-1, and the interface end is connected to the third line segment 5-3. The vertical height of the cross section of the second line segment 5-2 gradually converges from the fixed end to the interface end and gradually converges from the low to the high. The fixed end is at the low end, and the interface end is at the high end. On the side of the second line segment 5-2 connected to the third line segment (5-3), the lower side line segment takes a straight line to facilitate the curve at the interface to converge, and the upper side line segment does not take a straight line, but adds a horizontal line segment to increase the structural strength. The third line segment 5-3 is the line segment connecting the rod body 5 and the bearing part 2. Since the bearing part 2 is relatively small in size, the thickness direction of the rod body 5 is wider at the connection point (the connection position between the third line segment 5-3 and the mounting part 1), and a large arc chamfer is adopted in the height direction to reduce stress concentration at the connection point.

[0053] Since the structure of the magnetic rail brake is long and the interface is solidified, and the available space of the bogie is extremely limited, it is impossible to connect the rod body to the inner side of the axle box, so the load-bearing part is selected on the longitudinal end face of the axle box. The rod body was originally designed to directly connect the load-bearing part and the mounting part, but this scheme has obvious stress concentration and insufficient strength, which mainly occurs at the connection between the rod body and the mounting part and the interface of the mounting part. In view of the insufficient strength, the fixed hanger structure of the present invention was determined by combining technical means such as finite element shape optimization and topology optimization.

[0054] Through structural optimization design, structural mutations can be avoided and stress concentration can be reduced.

[0055] (1) Static strength analysis

[0056] Through static strength analysis, the maximum stress of the magnetic rail brake fixed hanger structure under static strength conditions is less than the allowable stress of the material, indicating that the static strength meets the requirements of standard BS EN 13749. Figure 8 , 9 shown.

[0057] (2) Quasi-static fatigue strength analysis

[0058] Through quasi-static fatigue strength analysis, the maximum and minimum stress values ​​of all nodes of the bracket structure are within the fatigue limit range determined by the Goodman curve, indicating that the fatigue strength meets the requirements of standard BS EN 13749. Fig.10 shown.

[0059] The points to be protected by the present invention are: (1) the use of bolts for pre-tightening installation on the end face of the axle box; (2) the magnetic rail brake interface, using a thickness-variable cone to ensure the interface size and structural strength; (3) the variable cross-section method of the fixed hanger rod to ensure structural strength and avoid stress concentration; (4) the inclination and bending method of the fixed hanger rod to connect the installation side and the interface side and ensure structural strength.

[0060] 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 magnetic rail brake fixed hanger suitable for urban rail vehicle bogies, characterized in that: include: A mounting portion (1), a bearing portion (2) and a rod body (5), wherein the mounting portion (1) and the bearing portion (2) are connected to two sides of the rod body (5), the mounting portion (1) is connected to one end of the axle box body (02) via a locking structure, the bearing portion (2) is connected to the magnetic rail brake (03), and the rod body (5) is a variable cross-section, curved structure.

2. The magnetic rail brake fixing hanger suitable for urban rail vehicle bogie according to claim 1, characterized in that: The rod body (5) comprises a first line segment (5-1), a second line segment (5-2) and a third line segment (5-3) which are connected in sequence and in series; an end of the first line segment (5-1) away from the second line segment (5-2) is connected to the mounting portion (1); an end of the third line segment (5-3) away from the second line segment (5-2) is connected to the bearing portion (2); and the second line segment (5-2) is designed with a variable cross-section.

3. The magnetic rail brake fixing hanger suitable for urban rail vehicle bogie according to claim 2, characterized in that: The two ends of the second line segment (5-2) are a fixed end and an interface end, the fixed end is connected to the first line segment (5-1), and the interface end is connected to the third line segment (5-3), the vertical height of the cross section of the second line segment (5-2) gradually converges from the fixed end to the interface end, and the lower surface of the side of the second line segment (5-2) connected to the third line segment (5-3) is a straight surface, and the upper surface is a horizontal surface.

4. The magnetic rail brake fixing hanger suitable for urban rail vehicle bogie according to claim 2, characterized in that: The first line segment (5-1) is in a horizontal arc structure with an arc of 120-150 degrees; The connection position between the third line segment (5-3) and the mounting portion (1) is a first connection point. The thickness direction of the third line segment (5-3) is widened at the first connection point, and the height direction is chamfered with a large arc.

5. The magnetic rail brake fixing bracket suitable for urban rail vehicle bogie according to claim 1, characterized in that: The locking structure comprises bolts and a plurality of bolt connection holes (3) provided on the mounting portion (1), and a detachable connection between the mounting portion (1) and the bearing portion (2) is achieved through the bolts and the bolt connection holes (3); the plurality of bolt connection holes (3) are arranged in a plurality of rows at intervals, and each row has at least two bolt connection holes (3).

6. The magnetic rail brake fixing hanger suitable for urban rail vehicle bogie according to claim 1, characterized in that: The body of the bearing part (2) is formed by connecting two circular arcs of different radii on a plane, wherein the radius of the large circular arc is 35-45 mm, and the radius of the small circular arc is 25-35 mm; the bearing part (2) is provided with a magnetic rail brake interface (4) which is connected to the magnetic rail brake (03), and the magnetic rail brake interface (4) is a variable thickness frustum cone interface structure.

7. The magnetic rail brake fixing hanger suitable for urban rail vehicle bogie according to claim 6, characterized in that: The variable thickness truncated cone interface structure comprises a circular groove opened on one side of the upper surface of the bearing part (2), the circular groove does not penetrate the bearing part (2), and a through hole is opened through the center of the circular groove.

8. The magnetic rail brake fixing hanger suitable for urban rail vehicle bogie according to claim 7, characterized in that: The diameter of the circular groove is 13-16 mm.

9. The magnetic rail brake fixing hanger applicable to the bogie of urban rail vehicles according to claim 1, characterized in that: The bearing portion (2) has a thickness of 25-30 mm.

10. The magnetic rail brake fixing hanger applicable to the bogie of an urban rail vehicle according to claim 1, characterized in that: The fixed hanger is made of 42CrMo material and is an integrated structure obtained by casting.

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