Articulated bogie for low-floor straddle-type monorail

Abstract

An articulated bogie for a low-floor straddle-type monorail, comprising: a framework, a locomotion wheel assembly, a horizontal wheel assembly, foundation brakes, driving units, air springs, a traction articulation mechanism, traction rubber piles, shock absorbers, and the like. The articulated bogie is a two-axle bogie; the upper portion of the traction articulation mechanism is connected to two compartments respectively, achieving motion decoupling of adjacent compartments; and the lower portion of the traction articulation mechanism is connected to the traction center of the bogie to transfer loads such as traction force and braking force. The driving units are arranged in a tire assembly and are each integrated with a gear box and a motor; an interface is reserved at the gear box end to mount a locomotion tire assembly; and the motor end is directly and firmly connected to the framework. The bogie only occupies the upper space on a single side, thereby achieving the low-floor design of vehicles. The articulated bogie for a low-floor straddle-type monorail has a simple and compact structure, facilitates full utilization of the space at the ends of vehicles, reduces the number of horizontal wheel assemblies, and improves the utilization efficiency of parts of bogies.

Description

A low-floor straddle-type monorail articulated bogie Technical Field

[0001] This patent relates to a low-floor straddle-type monorail articulated bogie, belonging to the field of bogie technology. Background Art

[0002] As a rail transit system, straddle-type monorails are widely used in the rail transit sector. Existing straddle-type monorails primarily include two types: dual-axle bogies with high floors and single-axle bogies with low floors. Compared to high-floor systems, the single-axle bogie low-floor system offers higher vertical space utilization. In particular, it requires less vertical space in tunnels, reducing line construction workload.

[0003] A characteristic of single-axle bogies combined with low-floor vehicles is that they require a wheel well within the passenger compartment to accommodate the area where the tires extend beyond the floor. Reducing the wheel well occupancy significantly increases the effective use of passenger compartment space.

[0004] Key technologies in the design of articulated bogies include the bogie's articulated structure, horizontal wheel arrangement, and structural design. Currently, articulated bogies for low-floor straddle monorail systems are still in the research phase and have yet to be fully implemented. Designing bogies that fully leverage the advantages of a low floor and articulated structure presents a critical technical challenge facing those skilled in the art.

[0005] A search revealed that CN110182240A discloses a straddle-type monorail vehicle body and bogie connection structure and a straddle-type monorail vehicle. The straddle-type monorail vehicle body and bogie connection structure comprises a first carbody, a bogie assembly, and a second carbody, arranged in sequence. The rear end of the first carbody is provided with a rear end of a first carbody hinge, while the front end of the second carbody is provided with a second carbody hinge and a support. A traction lower center plate assembly is mounted on the central traction pin of the bogie assembly. This structure secures the front and rear cars to the bogie, but does not simultaneously achieve torsional and yaw decoupling. Summary of the Invention

[0006] The technical problem to be solved by this patent is to overcome the shortcomings of the above-mentioned existing technologies and provide a low-floor straddle-type monorail articulated bogie that decouples torsion and deflection, transmits traction and braking forces, and mitigates and attenuates vibration and impact. This invention integrates and simplifies the inter-vehicle structure, reduces the distance between axles, and realizes a smaller wheelhouse closer to the gangway, fully utilizing the space at the vehicle ends and increasing the effective area within the passenger compartment.

[0007] The technical solution adopted by this patent to solve its technical problems is: a low-floor straddle-type monorail articulated bogie, including a bogie frame, characterized in that: an articulated traction structure is arranged at the center of the bogie frame, and the articulated traction structure includes: a central traction seat elastically supported on the bogie frame, a first articulated seat and a second articulated seat respectively fixed to two adjacent car bodies, the lower part of the first articulated seat is connected to the central traction seat, the first articulated seat and the second articulated seat are articulated by a rubber joint bearing, and the center line of the rubber joint bearing is arranged along the lateral direction of the vehicle.

[0008] The bogie traction articulation structure of the present invention includes a central traction assembly consisting of first and second articulated seats, each connected to the front and rear carriages, and the bogie frame. The traction articulation structure enables point fixation between the front and rear carriages, decoupling torsion and deflection, transmitting traction and braking forces, and mitigating and attenuating vibration and impact.

[0009] The bogie described in this invention is a dual-axle bogie with self-stability, offering improved anti-nodding performance compared to straddle-type single-axle bogies. Its articulated design reduces the excitation input to the entire train caused by track irregularities, resulting in excellent operational stability and translational performance. When negotiating curves, the relative lateral displacement of adjacent vehicles in an articulated train is minimal, and the vehicle body is relatively short, resulting in excellent curve performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a schematic diagram of a low-floor straddle-type monorail articulated bogie according to the present invention.

[0011] Figure 2 is a schematic diagram of the articulated traction structure.

[0012] FIG3 is an exploded schematic diagram of two articulated seats in the articulated traction structure.

[0013] FIG4 is a schematic diagram of an exploded view of the articulated traction structure.

[0014] The numbers in the figure are as follows:

[0015] 1-bogie frame, 11-central box, 21-traveling wheel, 22-guide wheel, 23-stabilizing wheel, 3-bogie secondary suspension, 31-air spring, 4-articulated traction structure, 41-first articulated seat, 411-bearing seat, 412-cover plate, 413-tapered traction shaft, 414-connecting bolt, 415-sealing plate, 42-second articulated seat, 421-transverse through hole, 422-anti-loosening baffle, 43-center traction seat, 431-vertical plate, 432-end plate, 434-transverse stop, 44-rubber joint bearing, 441-elastic node, 442-connecting pin shaft, 46-center traction node, 5-basic braking device, 6-drive unit. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] As shown in Figures 1 to 4, the low-floor straddle-type monorail articulated bogie according to an embodiment of the present invention includes a bogie frame 1. An articulated traction structure 4 is provided at the center of the bogie frame 1. The articulated traction structure 4 includes: a central traction seat 43 elastically supported on the bogie frame 1, a first articulated seat 41 and a second articulated seat 42 respectively fixed to two adjacent car bodies.

[0018] Among them, the central traction seat 43 has a horizontal vertical plate 431 and end plates 432 arranged at both ends of the vertical plate 431. The two sides of the vertical plate 431 are supported in the central box 11 of the bogie frame 1 by longitudinal rubber piles 433, and the outer side of the end plate 432 is supported in the central box 11 of the bogie frame 1 by a horizontal stop 434.

[0019] The first articulated seat 41 has a tapered traction shaft 413 at its lower portion. A central traction node 46 is provided within the central traction seat 43. The tapered traction shaft 413 is inserted into the central traction node 46 to connect the first articulated seat 41 to the central traction seat 43. Specifically, the first articulated seat 41 has a connecting bolt 414 and a sealing plate 415. The sealing plate is located at the bottom of the central traction seat 43. The connecting bolt 414 passes through the first articulated seat 41 and the sealing plate 415 and is tightened with a nut to limit vertical relative movement between the first articulated seat 41 and the central traction seat 43.

[0020] The first hinge seat 41 and the second hinge seat 42 are hingedly connected via a rubber spherical bearing 44, the centerline of which is arranged along the lateral direction of the vehicle. Specifically, in this embodiment, the first hinge seat 41 is symmetrically provided with two bearing seats 411 for securing the rubber spherical bearing 44. The second hinge seat 42 has a transverse through-hole 421, within which the center portion of the rubber spherical bearing 44 is secured. The ends of the rubber spherical bearing 44 are positioned within the bearing seats 411 and are compressed within the bearing seats 411 by a cover plate 412. In this embodiment, the rubber spherical bearing 44 includes an elastic node 441 and a connecting pin 442. The elastic node 441 is made of vulcanized rubber and metal. The elastic node 441 is press-fitted together with the transverse through hole 421 of the second hinge seat 42 by interference fit, and is provided with double-sided anti-loosening baffles 422; the connecting pin 442 is installed on the bearing seat 411 through the lower arc, and the upper part of the connecting pin 442 is flat and fixed by the cover plate 412 to prevent the connecting pin 441 from moving up and down.

[0021] The first and second articulated seats 41, 42 are each secured to the corresponding vehicle bodies via locating pins and bolted to the vehicle bodies. As shown in Figure 1 , two vehicle dampers 45 are mounted above the articulated traction structure 4, with their ends connected to the front and rear vehicle ends. Working in conjunction with the articulated traction structure 4, these dampers attenuate longitudinal impact forces, balance dynamic relative displacement between vehicles, and enhance vehicle stability and comfort.

[0022] As shown in Figure 1, the bogie frame 1 is provided with a bogie secondary suspension 3. The bogie secondary suspension 3 includes two pairs of air springs 31 located on either side of the bogie frame 1. Adjacent vehicles rest on a corresponding pair of air springs 31. The two pairs of air springs 31 are connected by an air path, and the two air springs on the same side are connected in series to achieve uniform weight distribution. The bogie frame 1 has two pairs of stabilizing wheel assemblies 23 and two pairs of steering wheels 22. The running wheel assembly 21 is bolted to one end of the drive unit 6, and the middle of the drive unit 6 is bolted to the inside of the bogie frame 1; the basic brake device 5 is bolted to the bogie.

[0023] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-floor straddle-type monorail articulated bogie, comprising a bogie frame (1), characterized in that: An articulated traction structure (4) is arranged at the center of the bogie frame (1), and the articulated traction structure (4) comprises: a central traction seat (43) elastically supported on the bogie frame (1), a first articulated seat (41) and a second articulated seat (42) respectively fixed to two adjacent vehicle bodies, the lower part of the first articulated seat (41) is connected to the central traction seat (43), the first articulated seat (41) and the second articulated seat (42) are articulated via a rubber joint bearing (44), and the center line of the rubber joint bearing (44) is arranged along the lateral direction of the vehicle.

2. The low-floor straddle-type monorail articulated bogie according to claim 1, characterized in that: The first articulated seat (41) has a tapered traction shaft (413) at its lower portion, a central traction node (46) is arranged in the central traction seat (43), and the tapered traction shaft (413) is inserted into the central traction node (46) to achieve connection between the first articulated seat (41) and the central traction seat (43).

3. The low-floor straddle-type monorail articulated bogie according to claim 1, characterized in that: The first hinge seat (41) further comprises a connecting bolt (414) and a sealing plate (415), wherein the sealing plate is located at the bottom of the central traction seat (43), and the connecting bolt (414) passes through the first hinge seat (41) and the sealing plate (415) and is locked by a nut, thereby limiting the vertical relative movement between the first hinge seat (41) and the central traction seat (43).

4. The low-floor straddle-type monorail articulated bogie according to claim 1, characterized in that: The central traction seat (43) comprises a transverse vertical plate (431) and end plates (432) arranged at both ends of the vertical plate (431); both sides of the vertical plate (431) are supported in the central box (11) of the bogie frame (1) through longitudinal rubber piles (433); and the outer side of the end plate (432) is supported in the central box (11) of the bogie frame (1) through transverse stops (434).

5. The low-floor straddle-type monorail articulated bogie according to claim 1, characterized in that: The first hinge seat (41) is symmetrically provided with two bearing seats (411) for fixing the rubber joint bearing (44); the second hinge seat (42) has a transverse through hole (421); the middle part of the rubber joint bearing (44) is fixed in the transverse through hole (421); the two ends of the rubber joint bearing (44) are placed in the bearing seats (411); and the rubber joint bearing (44) is pressed into the bearing seat (411) by a cover plate (412).

6. The low-floor straddle-type monorail articulated bogie according to claim 5, characterized in that: The rubber joint bearing (44) comprises: an elastic node (441) and a connecting pin (442); the elastic node (441) is made of rubber and metal vulcanized, the elastic node (441) and the transverse through hole (421) of the second hinge seat (42) are interference fit together, and anti-loosening baffles (422) are provided on both sides; the connecting pin (442) is installed on the bearing seat (411) through a lower arc, and the upper part of the connecting pin (442) is a plane and is fixed by a cover plate (412) to prevent the connecting pin (441) from moving up and down.

7. The low-floor straddle-type monorail articulated bogie according to claim 1, characterized in that: The first hinge seat (41) and the second hinge seat (42) are respectively fixed to the corresponding vehicle body via positioning pins, and are fixedly connected to the vehicle body via bolts.

8. The low-floor straddle-type monorail articulated bogie according to claim 1, characterized in that: The bogie frame (1) is provided with a bogie secondary suspension (3), the bogie secondary suspension (3) comprising two pairs of air springs (31) respectively located on both sides of the bogie frame (1), adjacent vehicles respectively rest on a corresponding pair of air springs (31), the two pairs of air springs (31) are connected via an air path, and two air springs on the same side are connected in series.

9. The low-floor straddle-type monorail articulated bogie according to claim 1, characterized in that: The bogie frame (1) has two pairs of stabilizing wheels (23) and two pairs of guide wheels (22).

10. The low-floor straddle-type monorail articulated bogie according to claim 1, characterized in that: The running wheel (21) is installed at one end of the drive unit (6) by bolt connection, and the middle part of the drive unit (6) is installed at the inner side of the bogie frame (1) by bolt connection; the basic brake device (5) is installed at the outer side of the bogie frame (2) by bolt connection, and brakes by means of a brake disc installed at the other end of the drive unit (6).

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