A vertical damper mounting base structure and a method of manufacturing a chassis

Abstract

The application discloses a vertical damper mounting base structure, which comprises a bottom frame side beam, a floor and a bolster, the bolster comprises an upper plate, a lower plate, a web and a support plate, the upper plate and the lower plate are connected through the web, the support plate is connected to the web and is located between the upper plate and the lower plate, the lower surface of the floor is overlapped with the support plate and the floor and the support plate are welded and fixed, the end of the bolster is welded and fixed with the bottom frame side beam, the bottom frame side beam further comprises a connecting arm, the connecting arm is welded and connected with the floor, the connecting plate is located below the floor and the connecting arm and is welded and fixed with the floor, the bolster and the connecting arm at the same time, the mounting base is welded and fixed with the bolster, the bottom frame side beam and the connecting plate at the same time, and the mounting seat is located below the mounting base and is riveted and fixed with the mounting base. The application provides a reaction force supporting structure of a vertical damper of a bogie and solves the rivet placement space problem in the cavity structure.

Description

TECHNICAL FIELD

[0001] The present application relates to a vertical damper mounting base structure and a bogie manufacturing method, and belongs to the technical field of rail vehicles, in particular to a vertical damper mounting base structure of a rail vehicle. BACKGROUND

[0002] The bogie and the car body are key structural components of a rail vehicle, and the vertical damper is one of the important components connecting the bogie and the car body, which can reduce the vertical vibration of the vehicle and improve the comfort of passengers. Since the vertical damper is in continuous circulation during the operation of the train, the mounting structure on the car body bogie also bears severe load, so ensuring the strength and safety performance of the structure is a difficult problem in the field.

[0003] The vertical damper mounting seat body is generally made of carbon steel material, and is usually fixed on the car body bogie by riveting. According to the different positions of the vertical damper, the mounting base structure provided on the bogie is also different, mainly including three schemes: one is that the carbon steel mounting seat is directly riveted on the bogie side beam, which is similar to the riveting scheme in the non-patent document "Process Research on Riveting of B-type Aluminum Alloy Car Body Bogie Side Beam and Casting"; two is that the carbon steel mounting seat is directly fixed on the bolster beam, such as the patent scheme with the application number CN201610438045; three is that the carbon steel mounting seat is fixed on the connection part between the bolster beam and the bogie side beam, such as the patent scheme with the application number CN202022260814.

[0004] Among them, scheme one requires that the mounting base is far away from the longitudinal distance of the bolster beam, which has a greater impact on the bogie frame and is not conducive to weight reduction of the frame. Scheme two requires that the mounting base is close to the longitudinal distance of the bolster beam, which is not suitable for bogies with current collector devices (third rail current collection scheme without pantograph). Scheme three requires that the mounting base is moderately away from the longitudinal distance of the bolster beam, which can facilitate the installation of bogies with or without current collectors, has good lightweight effect, and has strong universality, which is the mainstream scheme in the industry.

[0005] But according to the structure characteristics of the bolster and the floor, it is divided into two kinds of full-length floor structure and non-full-length floor structure, the former is that the floor is directly overlapped (crosses) on the bolster, and is connected through an overlapping weld, such as the patent scheme with the application number CN202022260814, the scheme structure is relatively simple, but due to the small height of the bolster and the connection of the floor with the bolster through only one weld, the failure is prone to occur under the action of the huge impact force of the bogie traction seat. The latter is that the floor is broken at the bolster part, the upper surface of the bolster is flush with the upper surface of the floor, and is connected through the upper and lower two welds, which can better resist the huge impact force of the bogie traction seat. But this non-full-length floor structure brings greater difficulty to the setting of the vertical damper mounting structure, such as the pre-arrangement of the mounting base on the bolster in the patent scheme with the application number CN202022260814, which will result in that the main welds between the bolster and the side beam of the underframe outside cannot be welded, and hidden dangers are brought to the structure safety.

[0006] In addition, the interface flatness requirement of the riveting structure is high, the deformation of the welding structure is large, which affects the flatness of the riveting interface, and then affects the uneven force of the rivet, and brings hidden dangers to the structure. SUMMARY

[0007] In order to overcome the problems in the prior art, the present application provides a vertical damper mounting base structure and an underframe manufacturing method, which is helpful to reliably install the vertical damper mounting base structure at the connecting part of the bolster and the side beam of the underframe, and the specific technical scheme is as follows.

[0008] A vertical damper mounting base structure, comprising an underframe side beam, a floor and a bolster, the bolster comprising an upper plate, a lower plate, a web plate and a support plate, the upper plate and the lower plate being connected through the web plate, the support plate being connected to the web plate and located between the upper plate and the lower plate, the lower surface of the floor being overlapped on the support plate and the floor being welded and fixed with the support plate, and the end of the bolster being welded and fixed with the underframe side beam.

[0009] characterized in that it further comprises a mounting base, a connecting plate and a mounting seat, the underframe side beam further comprising a connecting arm, the connecting arm being welded and connected with the floor, the connecting plate being located below the floor and the connecting arm, and the connecting plate being welded and fixed with the floor, the bolster and the connecting arm at the same time, the mounting base being welded and fixed with the bolster, the underframe side beam and the connecting plate at the same time, and the mounting seat being located below the mounting base and being riveted and fixed with the mounting base.

[0010] By adopting the above technical scheme, the mounting seat and the mounting base are located near the connecting part of the underframe side beam and the bolster, and have strong universality, and can meet the mounting structure of the bogie with or without a current collector at the same time, which is helpful to solve the problem of excessive local weld fatigue and improve the safety and reliability of the car body.

[0011] Further, the mounting base comprises a mounting plate, a reinforcing rib one and a reinforcing rib two, both of which are plate structures; the mounting plate is flush with the lower plate, the lower edges of the reinforcing rib one and the reinforcing rib two are fixed to the upper surface of the mounting plate, and the reinforcing rib one and the reinforcing rib two are perpendicular to the mounting plate; the upper edge of the reinforcing rib one is welded to the connecting arm, the upper edge of the reinforcing rib two is welded to the connecting plate, and the mounting plate is welded to the side beam of the chassis and the lower plate. Preferably, the reinforcing rib one is perpendicular to the reinforcing rib two. The mounting base is formed into a semi-closed cavity structure, which not only serves as a reaction force support structure for the vertical damper of the bogie, but also solves the problem of rivet and bolt placement space in the cavity structure. Preferably, the reinforcing rib one and the reinforcing rib two are both asymmetric C-shaped structures, and the lower edges of the reinforcing rib one and the reinforcing rib two are both longer than the upper edges. Alternatively, process holes are arranged in the middle of the reinforcing rib one and the reinforcing rib two.

[0012] Further, the side beam of the chassis is a hollow profile structure, the side beam of the chassis has a support rib, the support rib is arranged inwardly from the inner wall of the side beam of the chassis, and the support rib is flush with the lower plate; the mounting plate is welded to the support rib. The arrangement of the support rib is conducive to improving the structural strength and stability of the mounting base.

[0013] Further, the welding seams of the mounting plate, the reinforcing rib one and the reinforcing rib two are all double-sided welding seams. The double-sided welding seams can effectively resist the load transmitted by the rivet pair.

[0014] Further, the mounting plate is machined to form a mounting plate machining surface, a mounting plate counterbore and a rivet mounting hole. After the mounting plate is welded to the chassis, the mounting plate machining surface, the mounting plate counterbore and the rivet mounting hole are formed on the mounting plate by machining, which is conducive to improving the installation accuracy of the mounting base, ensuring the installation strength of the riveting interface and improving the safety and reliability of the vehicle body.

[0015] Further, the connecting arm of the side beam of the chassis is provided with a connecting arm notch near the bolster, to facilitate the welding of the welding seam between the bolster and the side beam of the chassis.

[0016] Based on the same inventive concept, the present application also relates to a manufacturing method of a chassis, which comprises the vertical damper mounting base structure described above, and mainly comprises the following steps:

[0017] 1) welding the bolster to the side beam of the chassis;

[0018] 2) welding the floor to the bolster and the connecting arm of the side beam of the chassis;

[0019] 3), the connecting plate and the connecting arm, floor, pillow beam welding fixed;

[0020] 4), the mounting base of the mounting plate and the chassis side beam, the lower plate welding fixed, the upper edge of the reinforcing rib one and the connecting arm welding fixed, the upper edge of the reinforcing rib two and the connecting plate welding fixed;

[0021] 5), the installation plate processing surface, installation plate sink and rivet installation hole are processed on the mounting plate, and the mounting seat is riveted with the mounting plate.

[0022] The vertical damper mounting base structure of the application provides a reaction force support structure of the bogie vertical damper; solves the rivet and bolt placement space problem in the cavity structure; provides a bogie mounting structure with or without a current collector, which is strong in universality; solves the problem of local weld fatigue exceeding the standard, and improves the safety and reliability of the car body. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a chassis structure schematic diagram (bottom view) of the application;

[0024] Figure 2 is a schematic diagram of the mounting base;

[0025] Figure 3 is a chassis structure assembly welding schematic Figure 1 (upside down state);

[0026] Figure 4 is a chassis structure assembly welding schematic Figure 2 (upside down state);

[0027] Figure 5 is a chassis structure assembly welding schematic Figure 3 (upside down state);

[0028] Figure 6 is Figure 5 A-A sectional view (mounting plate structure) of the application;

[0029] Figure 7 is a partial schematic diagram of the mounting seat riveting structure;

[0030] Figure 8 is a schematic diagram of the first alternative scheme of the mounting base;

[0031] Figure 9 is a schematic diagram of the second alternative scheme of the mounting base.

[0032] In the figure: base frame 100, base frame side beam 1, support rib 11, connecting arm 12, connecting arm notch 12a, floor 2, mounting base 3, mounting plate profile 30, mounting plate 31, mounting plate processing surface 31a, mounting plate sink 31b, rivet mounting hole 31c, reinforcing rib one 32, short rib plate 32a, long rib plate 32b, process hole 32c, reinforcing rib two 33, short rib plate 33a, long rib plate 33b, process hole 33c, connecting plate 4, bolster beam 5, lower flat plate 51, bolster beam processing surface 51a, bolster beam processing hole 51b, web 52, support plate 53, upper flat plate 54, mounting seat 6, rivet pair 7.

[0033] Weld: w1-2, w1-3, w1-4, w1-5, w2-5, w3, w31, w32, w3-4, w3-5. DETAILED DESCRIPTION

[0034] The application will be further described in detail below with reference to the accompanying drawings.

[0035] Referring to Figures 1-9 , the base frame structure schematic diagram of the application is shown in Figure 1 , the base frame 100 includes base frame side beam 1, floor 2, mounting base 3, connecting plate 4, bolster beam 5, mounting seat 6, and rivet pair 7. The mounting base 3 is located on the side of both ends of the bolster beam 5 and is connected with the bolster beam 5 and the base frame side beam 1 at the same time. The mounting seat 6 is fixed on the mounting base 3 through the rivet pair 7. The connecting plate 4 is located above the mounting base 3 and is used to connect the base frame side beam 1, the floor 2, the mounting base 3 and the bolster beam 5.

[0036] Figure 2 is a structural schematic diagram of the mounting base 3. The mounting base 3 includes the mounting plate 31, the reinforcing rib one 32 and the reinforcing rib two 33. The reinforcing rib one 32 and the reinforcing rib two 33 are both plate structures. The mounting plate 31 is in a substantially horizontal state. The lower edges of the reinforcing rib one 32 and the reinforcing rib two 33 are welded and fixed to the upper surface of the mounting plate 31 through the weld w3. The reinforcing rib one 32 and the reinforcing rib two 33 are located above the mounting plate 31. The reinforcing rib one 32 and the reinforcing rib two 33 are arranged perpendicularly to each other; both the reinforcing rib one 32 and the reinforcing rib two 33 are perpendicular to the mounting plate 31. The reinforcing rib one 32 (the reinforcing rib two 33) is welded and connected with the mounting plate 31 in the form of double-sided weld. The mounting base 3 is formed into a semi-closed cavity structure. Both the reinforcing rib one 32 and the reinforcing rib two 33 are asymmetric C-shaped structures. The length of the long rib plate 32b, 33b at the connection with the mounting plate 31 is longer than that of the short rib plate 32a, 33a away from the mounting plate 31 (that is, the length of the lower edge of the reinforcing rib one 32 and the reinforcing rib two 33 is greater than that of the upper edge), which limits the stress concentration position at the circular arc base material part and reduces the weld stress value, especially the weld stress value between the reinforcing rib one 32 and the reinforcing rib two 33 and the mounting plate 31.

[0037] Figure 3 、 Figure 4 、 Figure 5 and Figure 6 is a schematic view of the bottom frame assembly welding and processing process. The bottom frame side beam 1 is a large-section hollow profile structure, and a horizontal support rib 11 is arranged in the middle part and protrudes inward from the inner wall of the bottom frame side beam 1. The bottom frame side beam 1 also has a connecting arm 12 arranged flush with the floor 2 (the upper surface is flush). The connecting arm 12 is connected in abutment with the floor 2, and the connecting arm 12 of the bottom frame side beam 1 is processed to have a connecting arm notch 12a at a position close to the pillow beam 5 to facilitate welding of the weld joint between the pillow beam 5 and the bottom frame side beam 1. The pillow beam 5 includes a lower plate 51, a web plate 52, a support plate 53, an upper plate 54, and a plurality of internal rib plates. The support plate 53 is parallel to the lower plate 51 and the upper plate 54 and is located between the two. The lower plate 51 is flush with the support rib 11 of the bottom frame side beam 1, the support plate 53 is overlapped with the lower surface of the floor 2 and is welded and fixedly connected with the support plate 53, and the upper plate 54 is connected in abutment with the upper surface of the floor 2 and is flush. The end of the pillow beam 5 is welded and connected with the bottom frame side beam 1. The mounting plate 31 of the mounting base 3 is kept a certain distance from the web plate 52 and is connected in abutment with the lower plate 51, the bottom frame side beam 1, and the support rib 11 by welding, and the mounting plate 31 is flush with the support rib 11 and the lower plate 51. The connecting plate 4 is welded and fixedly connected with the floor 2, the pillow beam 5, and the connecting arm 12. The upper edge of the first reinforcing rib 32 is welded and fixedly connected with the connecting arm 12 of the bottom frame side beam 1, and the upper edge of the second reinforcing rib 33 is welded and fixedly connected with the connecting plate 4. The welding connection method of the present application effectively solves the problem of fatigue strength of the weld joint at the key stress position.

[0038] Bottom frame manufacturing method:

[0039] Step one: the end of the pillow beam 5 is connected in full welding with the bottom frame side beam 1 through the weld joint w1-5. Then the floor 2 is overlapped with the connecting arm 12 of the bottom frame side beam 1 and is connected through the weld joint w1-2. The floor 2 is overlapped on the support plate 53 of the pillow beam 5 and is connected with the support plate 53 through the weld joint w2-5.

[0040] Step two: the connecting plate 4 is placed at the connecting arm notch 12a part of the bottom frame side beam 1 and is located below the floor 2. The connecting plate 4 is connected with the connecting arm 12, the floor 2, and the pillow beam 5 through the weld joints w1-4, w2-4, and w4-5, respectively.

[0041] Step three: place the mounting base 3 on the connecting plate 4 and the connecting arm 12 in the state of the bottom frame lower surface upward. The mounting plate 31 is connected to the bottom frame side beam 1 (and the support rib 11) and the lower flat plate 51 of the bolster beam 5 through the welds w1-3, w3-5, respectively. The reinforcing rib one 32 is connected to the bottom frame side beam 1 through the weld w1-3. The upper edge of the reinforcing rib one 32 is connected to the connecting arm 12. The upper edge of the reinforcing rib two 33 is connected to the connecting plate 4 through the weld w3-4. The reinforcing rib one 32 is located below the connecting arm 12, and the reinforcing rib two 33 is located below the connecting plate 4, avoiding the direct contact between the mounting base 3 and the floor 2 with a relatively thin rib plate wall thickness, and ensuring the overall vertical load-bearing performance of the structure.

[0042] Step four: after the assembly welding, the lower flat plate 51 of the bolster beam 5 and the mounting plate 31 of the mounting base 3 are machined as a whole to process the bolster beam processing surface 51a and the mounting plate processing surface 31a, eliminating the welding deformation on the plane, which is used for high-precision installation with the bogie. At the same time, the mounting plate counterbore 31b, the rivet mounting hole 31c and the bolster beam processing hole 51b are machined, which are used for placing the mounting seat 6, the rivet pair 7 and other bolts and equipment. The mounting plate counterbore 31b is a non-through structure, leaving a remaining plate material with a thickness of t at the bottom to reserve the force transmission path, so as to maintain the overall strength of the mounting base 3. The rivet pair 7 and other bolts can be inserted and arranged in place through the opening part of the semi-closed cavity of the mounting base 3, and then fastened by using tools to fix the mounting seat 6 under the mounting plate 31.

[0043] Figure 7 is a local schematic diagram of the mounting base riveting structure.

[0044] The rivet pair 7 connects the mounting plate 31 of the mounting base 3 and the mounting seat 6 as a whole. In the vicinity of the rivet pair 7, the welds w3 of the mounting plate 31, the reinforcing rib one 32 and the reinforcing rib two 33 are double-sided welds w31, w32, which have been pre-assembled and welded through, and can effectively resist the load transmitted by the rivet pair 7, ensuring the service life of the bottom frame 30 for more than 30 years. The mounting seat 6 is provided with a locally thickened boss (not shown), and a threaded hole (not shown) is arranged on the boss for mounting the vertical shock absorber of the bogie. The boss cooperates with the mounting plate counterbore 31b and leaves a certain gap to avoid interference.

[0045] Figure 8 is a schematic diagram of the first alternative scheme of the mounting base. The mounting plate 31 and the reinforcing rib one 32 (or the mounting plate 3 and the reinforcing rib two 33) of the mounting base 3 are machined as a whole from the "T"-shaped mounting plate profile 30, avoiding the distribution of welds near the fatigue load bearing part of the rivet pair 7, and further improving the structural safety.

[0046] Figure 9is the schematic view of the mounting base alternative solution two. The reinforcing rib one 32 and the reinforcing rib two 33 of the mounting base 3 adopt a welded structure in the overall "L" shape, and are connected at the end to form a semi-closed structure, and subsequently form a fully closed cavity structure with the web plate 52 of the side beam 1 and the bolster beam 5, which can further improve the overall rigidity of the mounting base 3. Process holes 32c and process holes 32c are respectively arranged in the web portions of the reinforcing rib one 32 and the reinforcing rib two 33, which are used to provide the rivet pair 7 and other bolt mounting operation space.

[0047] The embodiments of the present application are described above in combination with the drawings, and the embodiments and features in the embodiments can be combined with each other without conflict. The present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not limiting. Those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which are all within the protection scope of the present application.

Claims

1. A vertical vibration damper mounting base structure, comprising a chassis side beam (1), a floor (2) and a bolster (5), wherein the bolster (5) comprises an upper plate (54), a lower plate (51), a web (52) and a support plate (53), wherein the upper plate (54) and the lower plate (51) are connected via the web (52), the support plate (53) is connected to the web (52), and the support plate (53) is located between the upper plate (54) and the lower plate (51); the lower surface of the floor (2) is overlapped with the support plate (53), and the floor (2) and the support plate (53) are welded and fixed; and the end of the bolster (5) is welded and fixed to the chassis side beam (1); It is characterized in that It also includes a mounting base (3), a connecting plate (4) and a mounting seat (6); the chassis side beam (1) also includes a connecting arm (12), and the connecting arm (12) is welded to the floor (2); the connecting plate (4) is located below the floor (2) and the connecting arm (12), and the connecting plate (4) is welded and fixed to the floor (2), the bolster (5) and the connecting arm (12); the mounting base (3) is welded and fixed to the bolster (5), the chassis side beam (1) and the connecting plate (4); the mounting seat (6) is located below the mounting base (3) and is riveted and fixed to the mounting base (3); The mounting base (3) comprises a mounting plate (31), a first reinforcing rib (32) and a second reinforcing rib (33), wherein the lower edges of the first reinforcing rib (32) and the second reinforcing rib (33) are fixed to the upper surface of the mounting plate (31), the upper edge of the first reinforcing rib (32) is welded and fixed to the connecting arm (12), and the upper edge of the second reinforcing rib (33) is welded and fixed to the connecting plate (4).

2. A vertical vibration damper mounting base structure according to claim 1, characterized in that: The reinforcing rib 1 (32) and the reinforcing rib 2 (33) are both plate-shaped structures; the mounting plate (31) is flush with the lower flat plate (51), and the reinforcing rib 1 (32) and the reinforcing rib 2 (33) are both perpendicular to the mounting plate (31); the mounting plate (31) is welded and fixed to the chassis side beam (1) and the lower flat plate (51) at the same time.

3. The vertical vibration damper mounting base structure according to claim 2, characterized in that: The first reinforcing rib (32) is perpendicular to the second reinforcing rib (33).

4. The vertical vibration damper mounting base structure according to claim 2, characterized in that: The reinforcing rib 1 (32) and the reinforcing rib 2 (33) are both asymmetric C-shaped structures, and the lower edge lengths of the reinforcing rib 1 (32) and the reinforcing rib 2 (33) are both greater than the upper edge lengths; or a process hole is provided in the middle of the reinforcing rib 1 and the reinforcing rib 2.

5. The vertical vibration damper mounting base structure according to claim 2, characterized in that: The chassis side beam (1) is a hollow profile structure, and the chassis side beam (1) has a support rib (11). The support rib (11) is protruded inward from the inner wall of the chassis side beam (1), and the support rib (11) is flush with the lower flat plate (51); the mounting plate (31) is welded and fixed to the support rib (11).

6. The vertical vibration damper mounting base structure according to claim 2, characterized in that: The welds between the mounting plate (31) and the first reinforcing rib (32) and the second reinforcing rib (33) are all double-sided welds.

7. The vertical vibration damper mounting base structure according to claim 2, characterized in that: The mounting plate (31) is processed with a mounting plate processing surface (31a), a mounting plate sink (31b) with a non-through structure, and a rivet mounting hole (31c).

8. A vertical vibration damper mounting base structure according to claim 1 or 2, characterized in that: The connecting arm (12) of the chassis side beam (1) is provided with a connecting arm notch (12a) at a position close to the bolster beam (5).

9. A method for manufacturing an underframe, the underframe comprising the vertical vibration damper mounting base structure according to any one of claims 2 to 7, comprising the following steps: 1) Welding and fixing the bolster (5) and the chassis side beam (1); 2) Welding and fixing the floor (2) to the bolster (5) and the connecting arm (12) of the chassis side beam (1); 3) Welding and fixing the connecting plate (4) to the connecting arm (12), the floor (2), and the bolster (5); 4) Welding the mounting plate (31) of the mounting base (3) to the chassis side beam (1) and the lower flat plate (51), welding the upper edge of the first reinforcing rib (32) to the connecting arm (12), and welding the upper edge of the second reinforcing rib (33) to the connecting plate (4); 5) Processing a mounting plate processing surface (31a), a mounting plate sink (31b), and a rivet mounting hole (31c) on the mounting plate (31), and riveting the mounting seat (6) to the mounting plate (31) to fix them.

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