Vertical shock absorber mounting base structure and underframe manufacturing method

Abstract

The invention discloses a vertical shock absorber mounting base structure which comprises an underframe edge beam, a floor and a sleeper beam, the sleeper beam comprises an upper flat plate, a lower flat plate, a web plate and a supporting plate, the upper flat plate and the lower flat plate are connected through the web plate, and the supporting plate is connected to the web plate and located between the upper flat plate and the lower flat plate; the lower surface of the floor is in lap joint with the supporting plate, and the floor and the supporting plate are welded and fixed. The end part of the sleeper beam is welded and fixed with the chassis boundary beam; the chassis boundary beam further comprises a mounting base, a connecting plate, a mounting seat and a connecting arm, and the connecting arm is connected with a floor in a welded mode. The connecting plate is located below the floor and the connecting arm, and the connecting plate is welded and fixed to the floor, the sleeper beam and the connecting arm at the same time; the mounting base is simultaneously welded and fixed with the sleeper beam, the chassis boundary beam and the connecting plate; and the mounting seat is positioned below the mounting base and is riveted and fixed with the mounting base. The invention provides a counter-acting force supporting structure of a vertical shock absorber of a bogie. The counter-acting force supporting structure solves the problem of rivet placement space in a cavity structure.

Description

Technical Field

[0001] The invention relates to a vertical vibration damper mounting base structure and a base frame manufacturing method, belonging to the technical field of rail vehicles, and in particular to a vertical vibration damper mounting base structure of a rail vehicle. Background Art

[0002] The bogie and car body are key structural components of rail vehicles. The vertical shock absorber is one of the important components connecting the bogie and car body, which can reduce the vertical vibration of the vehicle and improve the comfort of passengers. Since the vertical shock absorber is in continuous circulation during the operation of the train, the mounting structure on the car body chassis connected to it is also subject to severe loads. Therefore, ensuring the strength and safety performance of the structure is a difficult problem in this field.

[0003] The main body of the vertical shock absorber mounting seat is generally made of carbon steel material, and is usually fixed to the vehicle chassis by riveting. Depending on the position of the vertical shock absorber, the mounting base structure set on the chassis is also different, mainly including three schemes: one is that the carbon steel mounting seat is directly riveted to the chassis side beam, similar to the riveting scheme in the non-patent document "Research on the Process of Drilling and Riveting the Side Beam and Casting of a Certain B-type Aluminum Alloy Vehicle Chassis Side Beam"; the second is that the carbon steel mounting seat is directly fixed to the pillow beam, such as the patent scheme with application number CN201610438045; the third is to fix the carbon steel mounting seat on both sides of the pillow beam and the connection between the chassis side beam, such as the patent scheme with application number CN202022260814.

[0004] Among them, the first scheme requires that the installation base be at a long distance from the bolster in the longitudinal direction, which has a great impact on the bogie frame and is not conducive to frame weight reduction. The second scheme requires that the installation base be at a short distance from the bolster in the longitudinal direction, which is not applicable to bogies with current collector devices (third rail current collection in non-pantograph schemes). The third scheme requires that the installation base be at a moderate distance from the bolster in the longitudinal direction, which can facilitate the installation of bogies with or without current collectors, and has a good lightweight effect. It is highly versatile and is the mainstream scheme in the industry.

[0005] However, according to the structural characteristics of the bolster and the floor, it is divided into two types: full-length floor structure and non-full-length floor structure. The former is that the floor is directly overlapped (spanned) above the bolster and connected by an overlap weld, as described in the patent scheme with application number CN202022260814. The structure of this scheme is relatively simple, but because the height of the bolster is small and it is connected to the floor by only one weld, it is easy to fail under the huge impact force of the bogie traction seat. The latter is that the floor is interrupted at the bolster, and the upper surface of the bolster is flush with the upper surface of the floor. It is connected by upper and lower welds, which can better resist the huge impact force of the bogie traction seat. However, this non-full-length floor structure brings greater difficulty to the setting of the vertical shock absorber mounting structure. For example, the solution in which the mounting base is pre-arranged on the bolster as described in the patent scheme with application number CN202022260814 will make it impossible to weld the main welds on the outside of the bolster and the chassis side beam, which will bring hidden dangers to the structural safety.

[0006] In addition, the riveted structure has high requirements for interface flatness and the welded structure has large deformation, which affects the flatness of the riveted interface, and in turn causes uneven force on the rivets, posing a safety hazard to the structure. Summary of the invention

[0007] In order to overcome the problems existing in the prior art, the present invention provides a vertical vibration damper mounting base structure and a chassis manufacturing method, which helps to reliably install the vertical vibration damper mounting base structure at the connection portion of the bolster beam and the chassis side beam. The specific technical solution is as follows.

[0008] A vertical vibration damper mounting base structure, comprising a chassis side beam, a floor and a bolster, the bolster comprising an upper plate, a lower plate, a web and a support plate, the upper plate and the lower plate are connected via the web, the support plate is connected to the web, and the support plate 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 is fixed to the support plate by welding; the end of the bolster is fixed to the chassis side beam by welding;

[0009] It is characterized in that it also includes a mounting base, a connecting plate and a mounting seat, the chassis side beam also includes a connecting arm, and the connecting arm is welded to the floor; the connecting plate is located below the floor and the connecting arm, and the connecting plate is welded and fixed to the floor, the bolster and the connecting arm at the same time; the mounting base is welded and fixed to the bolster, the chassis side beam and the connecting plate at the same time; the mounting seat is located below the mounting base and is riveted and fixed to the mounting base.

[0010] By adopting the above technical solution, the mounting seat and the mounting base are located near the connection between the frame side beam and the pillow beam, which has strong versatility and can meet the installation structure of the bogie with or without current collector. It is conducive to solving the problem of excessive fatigue of local welds and improves the safety and reliability of the car body.

[0011] Further, the mounting base includes a mounting plate, a first reinforcing rib and a second reinforcing rib, wherein the first reinforcing rib and the second reinforcing rib are both plate-shaped structures; the mounting plate is flush with the lower plate, the lower edges of the first reinforcing rib and the second reinforcing rib are both fixed to the upper surface of the mounting plate, and the first reinforcing rib and the second reinforcing rib are both perpendicular to the mounting plate; the upper edge of the first reinforcing rib is welded and fixed to the connecting arm, the upper edge of the second reinforcing rib is welded and fixed to the connecting plate, and the mounting plate is welded and fixed to the chassis side beam and the lower plate at the same time. Preferably, the first reinforcing rib is perpendicular to the second reinforcing rib. The mounting base is formed into a semi-enclosed cavity structure, which is not only a reaction force support structure for the bogie vertical shock absorber, but also solves the problem of rivet and bolt placement space in the cavity structure. Preferably, the first reinforcing rib and the second reinforcing rib are both asymmetric C-shaped structures, and the length of the lower edge of the first reinforcing rib and the second reinforcing rib is greater than the length of the upper edge. Alternatively, a process hole is provided in the middle of the first reinforcing rib and the second reinforcing rib.

[0012] Furthermore, the frame side beam is a hollow profile structure, the frame side beam has a support rib, the support rib is protruded inward from the inner wall of the frame side beam, the support rib is flush with the lower flat plate, and the mounting plate is welded and fixed to the support rib. The provision of the support rib is conducive to improving the structural strength and stability of the mounting base.

[0013] Furthermore, the welds between the mounting plate and the first reinforcing rib and the second reinforcing rib are double-sided welds, which can effectively resist the load transmitted by the rivet pair.

[0014] Furthermore, the mounting plate is processed with a mounting plate processing surface, a mounting plate countersunk platform and rivet mounting holes. After the mounting plate is welded and fixed to the chassis, the mounting plate processing surface, the mounting plate countersunk platform and the rivet mounting holes are formed on the mounting plate by machining, which is beneficial to improving the installation accuracy of the mounting seat, ensuring the installation strength of the riveted interface, and improving the safety and reliability of the vehicle body.

[0015] Furthermore, a connecting arm notch is provided at a position of the connecting arm of the chassis side beam near the bolster beam to facilitate welding of the weld between the bolster beam and the chassis side beam.

[0016] Based on the same inventive concept, the present invention also relates to a method for manufacturing a chassis, wherein the chassis includes the vertical vibration damper mounting base structure described above, and mainly includes the following steps:

[0017] 1) Welding and fixing the bolster beam to the side beam of the chassis;

[0018] 2) Welding and fixing the floor to the connecting arms of the bolster beam and the chassis side beam;

[0019] 3) Weld and fix the connecting plate to the connecting arm, floor and bolster;

[0020] 4) Weld and fix the mounting plate of the mounting base to the side beam of the chassis and the lower plate, weld and fix the upper edge of the first reinforcing rib to the connecting arm, and weld and fix the upper edge of the second reinforcing rib to the connecting plate;

[0021] 5) Processing a mounting plate processing surface, a mounting plate countersink and rivet mounting holes on the mounting plate, and fixing the mounting seat to the mounting plate by riveting.

[0022] The vertical shock absorber mounting base structure of the present invention provides a reaction force support structure for the vertical shock absorber of the bogie; solves the problem of space for placing rivets and bolts in the cavity structure; provides a bogie mounting structure that can be used with or without a current collector, and has strong versatility; solves the problem of excessive fatigue of local welds, and improves the safety and reliability of the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the chassis structure of the present invention (looking up);

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

[0025] Figure 3 This is the schematic diagram of the welding of the chassis structure Figure 1 (upside down state);

[0026] Figure 4 This is the schematic diagram of the welding of the chassis structure Figure 2 (upside down state);

[0027] Figure 5 This is the schematic diagram of the welding of the chassis structure Figure 3 (upside down state);

[0028] Figure 6 yes Figure 5 AA section view (mounting plate structure);

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

[0030] Figure 8 It is a schematic diagram of an alternative solution for mounting a base;

[0031] Fig. 9 This is a schematic diagram of alternative mounting base solution 2.

[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 1 32, short rib plate 32a, long rib plate 32b, process hole 32c, reinforcing rib 2 33, short rib plate 33a, long rib plate 33b, process hole 33c, connecting plate 4, bolster 5, lower plate 51, bolster processing surface 51a, bolster processing hole 51b, web 52, support plate 53, upper plate 54, mounting seat 6, rivet pair 7.

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

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0035] See also Figure 1-Figure 9 , the schematic diagram of the chassis structure of this application is as follows Figure 1 As shown, the chassis 100 includes chassis side beams 1, floor 2, mounting base 3, connecting plate 4, bolster 5, mounting base 6, rivet pair 7, etc. The mounting base 3 is located at the sides of both ends of the bolster 5, and is connected to the bolster 5 and chassis side beam 1 at the same time. The mounting base 6 is fixed to the mounting base 3 by the rivet pair 7. The connecting plate 4 is located above the mounting base 3, and is used to connect the chassis side beam 1, floor 2, mounting base 3 and bolster 5.

[0036] Figure 2 : is a schematic diagram of the structure of the mounting base 3. The mounting base 3 includes a mounting plate 31, a reinforcing rib 1 32 and a reinforcing rib 2 33. The reinforcing rib 1 32 and the reinforcing rib 2 33 are both plate-like structures. The mounting plate 31 is approximately in a horizontal state. The lower edges of the reinforcing rib 1 32 and the reinforcing rib 2 33 are welded and fixed to the upper surface of the mounting plate 31 by a weld w3. The reinforcing rib 1 32 and the reinforcing rib 2 33 are located above the mounting plate 31. The reinforcing rib 1 32 and the reinforcing rib 2 33 are arranged perpendicular to each other; the reinforcing rib 1 32 and the reinforcing rib 2 33 are both perpendicular to the mounting plate 31. The reinforcing rib 1 32 (the reinforcing rib 2 33) are welded and connected to the mounting plate 31 in the form of a double-sided weld, and the mounting base 3 forms a semi-enclosed cavity structure. Both the reinforcing rib 1 32 and the reinforcing rib 2 33 are asymmetric C-shaped structures. The length of the long ribs 32b, 33b at the connection with the mounting plate 31 is longer than the short ribs 32a, 33a far away from the mounting plate 31 (that is, the lower edge length of the reinforcing rib 1 32 and the reinforcing rib 2 33 is greater than the upper edge length), which limits the stress concentration position to the arc base material position, reduces the weld stress value, especially the weld stress value between the reinforcing rib 1 32 and the reinforcing rib 2 33 and the mounting plate 31.

[0037] Figure 3 , Figure 4 , Figure 5 and Figure 6 It is a schematic diagram of the welding and processing process of the chassis. The chassis side beam 1 is a large-section hollow profile structure, with a horizontal support rib 11 set in the middle, and the support rib 11 is protruded inward from the inner wall of the chassis side beam 1; the chassis side beam 1 also has a connecting arm 12 set flush with the floor 2 (flush with the upper surface), and the connecting arm 12 is butt-jointed with the floor 2. The connecting arm 12 of the chassis side beam 1 is processed with a connecting arm notch 12a at a position close to the bolster 5 to facilitate the welding of the weld between the bolster 5 and the chassis side beam 1. The bolster 5 includes a lower plate 51, a web 52, a support plate 53, an upper plate 54 and a plurality of internal rib plates, wherein 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 chassis side beam 1, the support plate 53 overlaps the lower surface of the floor 2 and is welded and fixedly connected to the support plate 53, and the upper plate 54 is butt-jointed and flush with the upper surface of the floor 2. The end of the bolster 5 is welded to the chassis side beam 1. The mounting plate 31 of the mounting base 3 is kept at a certain distance from the web 52, and is respectively butt-welded to the lower flat plate 51, the chassis side beam 1, and the support rib 11, and the mounting plate 31 is flush with the support rib 11 and the lower flat plate 51. The connecting plate 4 is welded and fixed to the floor 2, the bolster 5, and the connecting arm 12 at the same time, the upper edge of the reinforcing rib 1 32 is welded and fixed to the connecting arm 12 of the chassis side beam 1, and the upper edge of the reinforcing rib 2 33 is welded and fixed to the connecting plate 4. The welding connection method of the present invention effectively solves the fatigue strength problem of the weld at the key stress-bearing part.

[0038] Chassis manufacturing method:

[0039] Step 1: Fully weld the end of the bolster beam 5 to the frame side beam 1 through welds w1-5. Then overlap the floor 2 and the connecting arm 12 of the frame side beam 1, and connect them through welds w1-2. The floor 2 overlaps the support plate 53 of the bolster beam 5 and connects to the support plate 53 through welds w2-5.

[0040] Step 2: Place the connecting plate 4 at the connecting arm notch 12a of the chassis side beam 1, below the floor 2, and connect the connecting plate 4 to the connecting arm 12, the floor 2, and the pillow beam 5 through welds w1-4, w2-4, and w4-5, respectively.

[0041] Step 3: When the bottom surface of the flipped chassis is facing upward, place the mounting base 3 on the connecting plate 4 and the connecting arm 12. The mounting plate 31 is connected to the chassis side beam 1 (and the supporting rib 11) and the lower plate 51 of the bolster 5 through welds w1-3 and w3-5 respectively, and the reinforcing rib 1 32 is connected to the chassis side beam 1 through weld w1-3, and the upper edge of the reinforcing rib 1 32 is connected to the connecting arm 12; the upper edge of the reinforcing rib 2 33 is connected to the connecting plate 4 through weld w3-4. The reinforcing rib 1 32 is located below the connecting arm 12, and the reinforcing rib 2 33 is located below the connecting plate 4, which avoids direct contact between the mounting base 3 and the floor 2 with a thinner wall thickness of the rib plate, ensuring the overall vertical bearing performance of the structure.

[0042] Step 4: After the assembly welding is completed, the lower plate 51 of the bolster 5 and the mounting plate 31 of the mounting base 3 are machined as a whole to machine the bolster processing surface 51a and the mounting plate processing surface 31a, and eliminate the welding deformation on the plane for high-precision installation with the bogie. At the same time, the mounting plate sink 31b, the rivet mounting hole 31c and the bolster processing hole 51b are machined to place the mounting seat 6, the rivet pair 7 and other bolts and other equipment. The mounting plate sink 31b is a non-through structure, and a residual plate with a thickness of t is left at the bottom to retain the force transmission path 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 of the semi-enclosed cavity of the mounting base 3, and then tightened with tools to fix the mounting seat 6 under the mounting plate 31.

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

[0044] The rivet pair 7 connects the mounting seat 6 and the mounting plate 31 of the mounting base 3 as a whole. Near the rivet pair 7, the welds w3 between the mounting plate 31 and the reinforcing rib 1 32 and the reinforcing rib 2 33 are double-sided welds w31, w32, and have been pre-welded and fully welded in advance, which can effectively resist the load transmitted by the rivet pair 7 and ensure the service life of the chassis for more than 30 years. The mounting seat 6 is provided with a partially thickened boss (not shown), and a threaded hole (not shown) is provided on the boss for installing the vertical shock absorber of the bogie. The boss cooperates with the mounting plate sink 31b and leaves a certain gap to avoid interference.

[0045] Figure 8 The mounting plate 31 and the reinforcing rib 1 32 (or the mounting plate 3 and the reinforcing rib 2 33) of the mounting base 3 are integrally machined from a "T"-shaped mounting plate profile 30, avoiding the distribution of welds near the fatigue bearing part of the rivet pair 7, further improving the structural safety.

[0046] Fig. 9Schematic diagram of the second alternative solution for the mounting base. The reinforcing rib 1 32 and the reinforcing rib 2 33 of the mounting base 3 adopt an overall "L"-shaped welded structure, which is connected at the end to form a semi-closed structure, and then forms a fully closed cavity structure with the web 52 of the chassis 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 provided on the webs of the reinforcing rib 1 32 and the reinforcing rib 2 33 to provide space for the installation operation of the rivet pair 7 and other bolts.

[0047] The embodiments of the present invention are described above in conjunction with the accompanying drawings. 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 is not limited to the above-mentioned specific implementations, which are merely illustrative and not restrictive. Under the enlightenment of the present invention, those skilled in the art can also make many forms without departing from the scope of protection of the present invention and the claims, all of which belong to the protection scope of the present invention.

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; 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) at the same time; the mounting base (3) is welded and fixed to the bolster (5), the chassis side beam (1) and the connecting plate (4) at the same time; the mounting seat (6) is located below the mounting base (3) and is riveted and fixed to the mounting base (3).

2. A vertical vibration damper mounting base structure according to claim 1, characterized in that: The mounting base (3) comprises a mounting plate (31), a first reinforcing rib (32) and a second reinforcing rib (33), wherein the first reinforcing rib (32) and the second reinforcing rib (33) are both plate-shaped structures; the mounting plate (31) is flush with the lower plate (51), the lower edges of the first reinforcing rib (32) and the second reinforcing rib (33) are both fixed to the upper surface of the mounting plate (31), and the first reinforcing rib (32) and the second reinforcing rib (33) are both perpendicular to the mounting plate (31); the upper edge of the first reinforcing rib (32) is welded and fixed to the connecting arm (12), the upper edge of the second reinforcing rib (33) is welded and fixed to the connecting plate (4), and the mounting plate (31) is welded and fixed to the chassis side beam (1) and the lower plate (51) at the same time.

3. A vertical vibration damper mounting base structure according to claim 2, characterized in that: The reinforcing rib 1 (32) is perpendicular to the reinforcing rib 2 (33).

4. A 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. A 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 arranged to protrude 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. A 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. A 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 a chassis, the chassis comprising the vertical vibration damper mounting base structure according to any one of claims 2 to 8, mainly comprising the following steps: 1) Welding and fixing the bolster beam (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 frame side beam (1) and the lower plate (51), welding the upper edge of the reinforcing rib 1 (32) to the connecting arm (12), and welding the upper edge of the reinforcing rib 2 (33) to the connecting plate (4); 5) A mounting plate processing surface (31a), a mounting plate sink (31b) and a rivet mounting hole (31c) are processed on the mounting plate (31), and the mounting seat (6) is fixed to the mounting plate (31) by riveting.

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