A steel-aluminum hybrid light tram cab frame

Abstract

The present invention provides a steel-aluminum hybrid light tram cab frame, which is arranged at one end of the vehicle body and includes an upper aluminum alloy frame and a lower stainless steel frame; the upper aluminum alloy frame is detachably connected to the lower stainless steel frame and the vehicle body; the upper aluminum alloy frame includes a rear ring beam component, a top support beam component, and an A-pillar component; the A-pillar component is L-shaped as a whole, and the A-pillar component is arranged at an angle on both sides of the vehicle body parallel to the driver's field of view; the rear part of the top support beam component is fixedly connected to the rear ring beam component, and the front two sides of the top support beam component are fixedly connected to the upper part of the A-pillar component; the lower part of the A-pillar component is detachably connected to the lower stainless steel frame. On the basis of meeting the same strength, a modular and lightweight design of the driver's cab structure is achieved. At the same time, the design of the A-pillar of the upper aluminum alloy frame guarantees the driver's cab field of view to the greatest extent.

Description

Technical Field

[0001] The invention belongs to the technical field of rail vehicle manufacturing, and in particular relates to a steel-aluminum hybrid light tram cab frame. Background Art

[0002] With the booming development of urban rail transit in China, lightweight trams have become an indispensable part of the system. As the primary load-bearing component of the cab structure, the cab frame must balance strength and lightweight requirements. The cab frames of current trams on the market are very similar to those of subways. While these frames offer superior strength, they also create significant blind spots in the driver's field of view. Due to the unique characteristics of tram routes, the open routes at level crossings require a very wide field of view. This necessitates the integration of the cab's side windows and front windshield, minimizing the driver's blind spots. Summary of the Invention

[0003] The present invention aims to solve the problems of heavy weight of the tram cab frame, inconvenient disassembly of the overall design, and insufficient field of view, thereby providing a steel-aluminum hybrid light tram cab frame with light weight, a split structure that is easy to disassemble, and maximum protection of the driver's cab field of view.

[0004] To achieve the above-mentioned purpose of the invention, the present invention provides a steel-aluminum hybrid light tram cab frame, which is arranged at one end of the car body, including an upper aluminum alloy frame and a lower stainless steel frame; the upper aluminum alloy frame is detachably connected to the lower stainless steel frame and the car body; the upper aluminum alloy frame includes a rear ring beam composition, a top support beam composition, and an A-pillar composition; the arcs on both sides of the rear ring beam composition are consistent with the arc of the driver's cab head cover, and the top support beam composition is an overall figure-eight shape, a frame structure formed by fixedly connecting multiple cross beams and multiple longitudinal beams, and support plates are fixedly connected to the upper parts of the frame structures on both sides, which are consistent with the outer arc of the driver's cab head cover; the A-pillar composition is an overall L-shaped, and the A-pillar composition is arranged at an angle on both sides of the car body parallel to the driver's field of view; the rear part of the top support beam composition is fixedly connected to the rear ring beam composition, and the front two sides of the top support beam composition are fixedly connected to the upper part of the A-pillar composition; the lower part of the A-pillar composition is detachably connected to the lower stainless steel frame;

[0005] The lower stainless steel frame includes a structural beam composition, a enclosure, and a sealing plate; the structural beam composition includes columns and longitudinal beams, oblique beams, and cross beams connecting the upper ends of the columns, which are adaptively arranged to adapt to the shape of the vehicle body chassis and the arc shape of the driver's cab hood; the enclosure is fixedly connected between the columns, and the sealing plate is fixedly connected to the upper ends of the columns.

[0006] Furthermore, the rear ring beam comprises a rear cross beam, a side mounting seat, an intermediate mounting seat, a support seat, and a blocking seat. The lower sides of both ends of the rear cross beam are fixedly connected to the support seats. The arc shape of the two ends of the rear cross beam and the outer side of the support seat is consistent with the arc shape of the driver's cab hood. The lower side of the rear cross beam is fixedly connected to the side mounting seat and the intermediate mounting seat for connection to the vehicle body.

[0007] Furthermore, the top support beam comprises two trapezoidal frames on both sides, a top first cross beam connected to the front ends of the two trapezoidal frames and a cross beam in the middle, and a support plate is respectively provided at the rear end and the middle of the trapezoidal frame.

[0008] Furthermore, top oblique beams are provided at both ends of the front cross beam, and the top oblique beams are fixedly connected to the front end of the trapezoidal frame and the front cross beam.

[0009] Furthermore, the A-pillar component includes an A-pillar main beam and an A-pillar auxiliary beam, and the A-pillar auxiliary beam is fixedly connected to the A-pillar main beam and the top support beam to form a front end.

[0010] Furthermore, it also includes a bottom mounting seat, which includes a bottom mounting seat oblique beam, a bottom mounting seat longitudinal beam, a bottom mounting seat rib plate and a bottom mounting seat closing plate. The bottom mounting seat oblique beam and the bottom mounting seat longitudinal beam are fixedly connected, the bottom of the bottom mounting seat longitudinal beam is fixedly connected to the bottom mounting seat rib plate, and the end of the bottom mounting seat longitudinal beam is fixedly connected to the bottom mounting seat closing plate.

[0011] Furthermore, it also includes a connecting seat, which is in the shape of a plate and is fixedly connected to both sides of the front part of the structural beam, and its flatness is required to be no more than 1mm.

[0012] The steel-aluminum hybrid light tram driver's cab frame of the present invention is a split structure. Compared with the existing integral structure, it realizes the modular and lightweight design of the driver's cab structure on the basis of meeting the same strength. This frame can be directly used for most projects. This frame has strong adaptability and has passed strength and fatigue calculations. At the same time, the upper aluminum alloy frame A-pillar is integrated with the head cover, and the windshield and the driver's cab side windows share this A-pillar area as a bonding area to bond the windshield. The driver's cab side windows and the windshield are integrated. In addition, the shape of the A-pillar is specially designed. On the ray of the driver's cab field of view, the visible obstruction area of ​​the A-pillar is minimized, ensuring that the blind spot is minimized and the driver's cab field of view is maximized. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the driver's cab end;

[0014] Figure 2 This is a schematic diagram of the steel-aluminum hybrid cab frame from an external perspective;

[0015] Figure 3 This is a schematic diagram of the steel-aluminum hybrid cab frame from the perspective inside the vehicle;

[0016] Figure 4 Schematic diagram of the upper aluminum alloy frame;

[0017] Figure 5 is a schematic diagram of the lower stainless steel frame;

[0018] Figure 6 This is a schematic diagram of the upper aluminum alloy frame rear ring beam composition;

[0019] Figure 7 This is a schematic diagram of the top support beam composition of the upper aluminum alloy frame;

[0020] Figure 8 A schematic diagram of the upper aluminum alloy frame A-pillar composition;

[0021] Figure 9 A schematic diagram of the bottom mounting base of the upper aluminum alloy frame;

[0022] Figure 10 This is a schematic diagram of the lower stainless steel skeleton structural beam composition;

[0023] Figure 11 This is a schematic diagram of the lower stainless steel frame panel;

[0024] Figure 12 is a schematic diagram of a stainless steel skeleton sealing plate;

[0025] Among them: 1. Rear ring beam; 2. Top support beam; 3. A-pillar (left); 4. A-pillar (right); 5. Bottom mounting bracket (left); 6. Bottom mounting bracket (right); 7. Structural beam; 8. Hoarding; 9. Sealing plate;

[0026] 101, rear cross member; 102, side mounting seat; 103, middle mounting seat; 104, support seat; 105, blocking seat; 106, reinforced corner seat;

[0027] 201, first top crossbeam; 202, first middle crossbeam; 203, second middle crossbeam; 204, top oblique beam; 205, second top crossbeam; 206, top side longitudinal beam; 207, first middle longitudinal beam; 208, second middle longitudinal beam; 209, top reinforcing rib plate; 210, first support plate; 211, second support plate;

[0028] 301, A-pillar main beam; 302, A-pillar auxiliary beam; 303, welded rib plate;

[0029] 501, mounting seat oblique beam; 502, mounting seat longitudinal beam; 503, mounting seat mounting plate; 504, mounting seat rib plate; 505, mounting seat sealing plate;

[0030] 701. First lower horizontal beam; 702. Second lower horizontal beam; 703. First oblique beam; 704. Second oblique beam; 705. First longitudinal beam; 706. Second longitudinal beam; 707. First vertical column; 708. Second vertical column; 709. Third vertical column; 710. Connecting seat. DETAILED DESCRIPTION

[0031] like Figure 1 、 Figure 5 As shown in the structure, this application provides a steel-aluminum hybrid cab frame for a light tram. Figure 1 It can be seen that the steel-aluminum hybrid cab frame is set at one end of the vehicle body. Figure 2 、 Figure 3 As shown in the structure, the steel-aluminum hybrid cab frame consists of an upper aluminum alloy frame and a lower stainless steel frame. The upper aluminum alloy frame, the lower stainless steel frame and the vehicle body are connected by fasteners, making the cab structure replaceable.

[0032] like Figure 4 As shown in the structure, the upper aluminum alloy frame includes a rear ring beam component 1, a top support beam component 2, a left A-pillar component 3, a right A-pillar component 4, a left bottom mounting base, and a right bottom mounting base;

[0033] like Figure 6 As shown in the structure, the rear ring beam assembly 11 is welded together from a 50mm x 60mm x 3mm aluminum profile rear crossbeam 101, side mounting brackets 102, middle mounting bracket 103, support bracket 104, blocking bracket 105, and reinforced corner bracket 106. The lower ends of the rear crossbeam 101 are fixedly connected to the support brackets 104, where the outer arc of the support bracket 104 aligns with the arc of the cab hood. The side mounting brackets 102 and middle mounting bracket 103 are welded to the lower side of the rear crossbeam 101. Ribs 303 are welded inside the support bracket 104 to carry the longitudinal load of the vehicle body transmitted through the top support beam assembly 2. The side mounting brackets 102 and middle mounting bracket 103 serve as transition pieces connecting the upper aluminum alloy frame to the vehicle body. The rear ring beam assembly 1 is a key component connecting the upper aluminum alloy frame to the top crossbeam of the vehicle body. The contact surface with the vehicle body crossbeam is highly flat, and the arcs on both sides align with the arc of the cab hood at that location, ensuring a seal between the cab hood and the vehicle body.

[0034] like Figure 7As shown in the structure, the rear portion of the top support beam assembly 2 is welded to the rear ring beam and serves as the primary load-bearing structure of the upper aluminum alloy frame. The overall structure is in an "eight" shape, consistent with the external arc of the driver's cab hood. The top support beam assembly 2 provides structural support for the air conditioner and provides a hoisting and installation point for the driver's cab interior ceiling and air conditioning duct. The top support beam assembly 2 is a frame structure welded from 6005A-T6 aluminum profiles. The top support beam assembly 2 comprises two trapezoidal frames on either side, a front crossbeam connecting the front ends of the two trapezoidal frames, and a cross beam in the middle. A support plate is provided at each rear end and middle portion of the trapezoidal frame. The trapezoidal frame is welded together from a top second crossbeam 205, a top side longitudinal beam 206, and a top first intermediate longitudinal beam 207. The front ends of the two trapezoidal frames are welded to a top first crossbeam 201. Top diagonal beams 204 are provided at both ends of the top first crossbeam 201. The top diagonal beam 204 is welded to the front ends and front crossbeam of the trapezoidal frames. A top reinforcing rib plate 209 is welded to the front end of the top diagonal beam 204. The cross beam is composed of a first intermediate crossbeam 202 and a second intermediate crossbeam 203 welded together on either side of a second intermediate longitudinal beam 208. A support plate, first support plate 210 and second support plate 211, are located at the rear and middle portions of the two trapezoidal frames, respectively. The top support beam assembly 2 provides mounting points for the driver's cab interior and the cab's air conditioning ducts. The mounting points are reliably strong, and the first and second support plates 210 and 211 provide structural support for the cab's air conditioning installation, ensuring stable, reliable, and smooth installation.

[0035] The lower stainless steel frame includes structural beams, enclosure panels 8, and sealing panels 13. Figure 8 The structure shows that the A-pillar component 3 on the left is L-shaped as a whole, including the A-pillar main beam 301 and the A-pillar auxiliary beam 302. The A-pillar auxiliary beam 302 is welded to the front end of the A-pillar main beam 301 and the top support beam component 2. The angles of the A-pillar main beam 301 and the A-pillar auxiliary beam 302 on both sides of the vehicle body are parallel to the driver's field of view, thereby maximizing the driver's cab field of view and greatly reducing the driver's blind spot. The upper part of the A-pillar component is welded to the top support beam component 2, and the lower part is welded to the bottom mounting seat component. A plurality of welded ribs 303 are provided in the welding area between the upper part of the A-pillar component and the top support beam component 2 to achieve structural reinforcement and improve the strength of the welded structure between the A-pillar and the top support beam component 2.

[0036] like Figure 9As shown in the structure, the bottom mounting seat component includes a bottom mounting seat component on the left 5 and a bottom mounting seat component on the right 6, which are symmetrical. The bottom mounting seat component on the left 5 includes a mounting seat oblique beam 501, a mounting seat longitudinal beam 502, a mounting seat mounting plate 503, a mounting seat rib plate 504 and a mounting seat closing plate 505. The mounting seat oblique beam 501 and the mounting seat longitudinal beam 502 are welded together. By adjusting the welding angle, the convenient installation of the connection point between the upper aluminum alloy frame and the lower stainless steel frame is guaranteed. The mounting seat mounting plates 503 are welded on both sides of the lower part of the mounting seat longitudinal beam 502, and the mounting seat rib plates 504 are welded on both sides of the mounting plate. The end of the mounting seat longitudinal beam 502 is welded to the mounting seat closing plate 505. The mounting seat rib plates 504 increase the rigidity of the mounting seat closing plate 505, greatly enhancing the ability of the mounting structure at this location to withstand the vertical and lateral loads of the vehicle, and meeting the operating strength requirements. One side of the bottom mounting seat component is welded to the bottom of the A-pillar component, and the other side provides an installation point for connection with the lower stainless steel frame fasteners. The installation point area is reinforced by rib plate welding.

[0037] like Figure 10 As shown in the structure, structural beam component 7 is welded from stainless steel square tubes (SUS301L-MT). Its first, second, and third columns 707, 708, and 709 are welded to the vehicle body underframe and sidewall columns. The lower first crossbeam 701, lower second crossbeam 702, first diagonal beam 703, second diagonal beam 704, first longitudinal beam 705, and second longitudinal beam 706 are welded between the columns, forming a monolithic load-bearing welded structure. The positioning of the columns, longitudinal beams, diagonal beams, and crossbeams prioritizes the distribution of operational loads. This ensures sufficient space below the driver's cab while also ensuring its aesthetically pleasing position, following the curved shape of the cab hood. Connector 710 serves as a transitional structure connecting to the upper aluminum alloy frame, with a flatness requirement of no more than 1mm. To accommodate the contours of the vehicle body underframe and the curved shape of the cab hood, the columns, longitudinal beams, and crossbeams of structural beam component 7 are adaptively arranged.

[0038] like Figure 11 、 12 As shown in the structure, the panels 8, 8, 8, 8, 8, 8, and the sealing plate 9 are welded between the columns of the structural beam 7. The upper ends of the columns are welded to the sealing plate 9. The welding positions are intermittent, and the broken welds are sealed with glue. The above components ensure the sealing of the driver's cab structure.

[0039] The contact surfaces between the upper aluminum alloy frame bottom mounting base and the lower stainless steel frame structural beam, which are connected by 7 fasteners, are coated with dissimilar metal insulating paint. The installation adjustment pads are required to be sprayed with dissimilar metal insulating paint.

Claims

1. A steel-aluminum hybrid light tram cab frame, arranged at one end of the vehicle body, characterized by: The invention comprises an upper aluminum alloy frame and a lower stainless steel frame; the upper aluminum alloy frame is detachably connected to the lower stainless steel frame and the vehicle body; the upper aluminum alloy frame comprises a rear ring beam component (1), a top support beam component (2) and an A-pillar component; the arc shape of both sides of the rear ring beam component (1) is consistent with the arc shape of the driver's cab outer cover; the top support beam component (2) is in an overall figure-eight shape, and is a frame structure formed by fixedly connecting multiple cross beams and multiple longitudinal beams; the upper surfaces of the frame structures on both sides are fixedly connected with support plates, which are consistent with the outer arc shape of the driver's cab head cover; the A-pillar component is in an overall L-shape, and the A-pillar component is arranged at an angle on both sides of the vehicle body in parallel with the driver's field of view; the rear part of the top support beam component (2) is fixedly connected to the rear ring beam component (1), and the front two sides of the top support beam component (2) are fixedly connected to the upper part of the A-pillar component; the lower part of the A-pillar component is detachably connected to the lower stainless steel frame; The lower stainless steel frame includes a structural beam component (7), a panel (8) and a sealing plate (9); the structural beam component (7) includes columns and longitudinal beams, oblique beams and cross beams connected to the upper ends of the columns, and the columns, longitudinal beams and cross beams are adaptively arranged to adapt to the shape of the vehicle body chassis and the arc shape of the driver's cab head cover; the panels (8) are fixedly connected between the columns, and the sealing plates (9) are fixedly connected to the upper ends of the columns.

2. The steel-aluminum hybrid light tram cab frame according to claim 1, characterized in that: The rear ring beam component (1) comprises a rear cross beam (101), a side mounting seat (102), a middle mounting seat (103), a support seat (104) and a blocking seat (105); the lower sides of both ends of the rear cross beam (101) are fixedly connected to the support seat (104); the outer arcs of the two ends of the rear cross beam (101) and the support seat (104) are consistent with the arc of the driver's cab head cover; the lower side of the rear cross beam (101) is fixedly connected to the side mounting seat (102) and the middle mounting seat (103) for connecting to the vehicle body.

3. The steel-aluminum hybrid light tram cab frame according to claim 1, characterized in that: The top support beam assembly (2) comprises two trapezoidal frames on both sides, a top first cross beam (201) connected to the front ends of the two trapezoidal frames, and a cross beam in the middle. A support plate is provided at the rear end and the middle of the trapezoidal frame.

4. The steel-aluminum hybrid light tram cab frame according to claim 3, characterized in that: The A-pillar component comprises an A-pillar main beam (301) and an A-pillar auxiliary beam (302), wherein the A-pillar auxiliary beam (302) is fixedly connected to the A-pillar main beam (301) and the front end of the top support beam component (2).

5. The steel-aluminum hybrid light tram cab frame according to claim 3 is characterized by: The bottom mounting seat is also included, and the bottom mounting seat includes a mounting seat oblique beam (501), a mounting seat longitudinal beam (502), a mounting seat rib plate (504) and a mounting seat sealing plate (505). The mounting seat oblique beam (501) and the mounting seat longitudinal beam (502) are fixedly connected, the bottom of the mounting seat longitudinal beam (502) is fixedly connected to the mounting seat rib plate (504), and the end of the mounting seat longitudinal beam (502) is fixedly connected to the mounting seat sealing plate (505).

6. The steel-aluminum hybrid light tram cab frame according to claim 3, characterized in that: The structure also includes a connecting seat (710), which is plate-shaped and fixedly connected to both sides of the front of the structural beam, and its flatness is required to be no greater than 1mm.

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