Connecting structure, swing bolster and bogie

Abstract

The invention relates to the technical field of railway vehicles, and discloses a connecting structure which comprises a swing bolster, the swing bolster is rotationally connected with a vehicle body, suspenders are hinged to the two ends of the swing bolster in a flexible hinge mode or a spherical hinge mode, a connecting base is hinged to the end, away from the swing bolster, of each suspender, and the connecting bases are fixed to the vehicle body. The invention further discloses a swing bolster, the center of the swing bolster is provided with a connecting hole used for being rotationally connected with a vehicle body, and the whole area upper surface of the swing bolster forms a single continuous plane. The invention further discloses the bogie. The connecting structure, the swing bolster and the bogie have the advantages of being capable of automatically returning, free of overall maintenance, capable of meeting the installation requirement of a smaller vertical space and the like.

Description

Technical Field

[0001] The invention relates to a connecting structure, a bolster and a bogie, and belongs to the technical field of rail vehicles. Background Art

[0002] In order to improve the vehicle's ability to go through curves (turns), light rail vehicles generally adopt a connection structure of "bolster + slewing support structure (slewing bearing and slewing connection plate)" (such as Figure 1 The car body is connected to the bogie frame.

[0003] The traditional connection structure has the following defects:

[0004] 1. The relative rotation between the bogie and the vehicle body is achieved through the slewing bearing in the connection structure. However, the slewing bearing has no restoring torque. After the vehicle turns, the bogie can only passively return to the center through the force between the wheel and rail, which can easily lead to a series of problems (such as delayed or failed bogie reset, abnormal and increased wheel and rail wear, and excessive derailment coefficient, etc.).

[0005] 2. Since the slewing bearing is located in the middle of the connection between the car body and the bogie, it not only requires regular maintenance, but also requires a vehicle to be erected for maintenance operations, which is a huge workload.

[0006] 3. Due to the slewing support structure and the bolster adopts a low-middle-high-sides structure to meet the space requirements for installing the slewing support structure, when the floor height of the light rail vehicle is designed to be low, the vertical space required for the bogie installation is very limited, making it difficult to adapt to the design requirements of low-floor rail vehicles. Summary of the Invention

[0007] The present invention aims to provide a connecting structure, a bolster and a bogie to solve the problem of no restoring torque when a vehicle passes through a curve.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A connection structure includes a bolster, which is rotatably connected to a vehicle body. Both ends of the bolster are connected to suspension rods via flexible hinges or ball hinges. The end of the suspension rod away from the bolster is hinged to a connecting seat, which is fixed to the vehicle body.

[0010] When negotiating curves, the boom's longitudinal swing around the vehicle body connection creates a vertical height difference, generating a restoring torque through its own gravity. This overcomes the problem of traditional connection structures lacking a restoring torque when negotiating curves. The smaller the curve and the greater the height difference, the greater the restoring torque, which meets actual operational requirements.

[0011] Furthermore, the connecting seat includes an articulated rod hinged to the boom, a transition rod fixed to the articulated rod, and a connecting rod fixed to the transition rod, and the connecting rod is fixed to the vehicle body.

[0012] Furthermore, a connection hole is provided at the center of the bolster, and the bolster is rotatably connected to the vehicle body through the connection hole.

[0013] Furthermore, the entire upper surface of the bolster forms a single continuous plane.

[0014] A bolster is provided with a connection hole at the center of the bolster for rotationally connecting with a vehicle body, and the entire upper surface of the bolster forms a single continuous plane.

[0015] A bogie comprises a frame, on which the above-mentioned connecting structure is installed.

[0016] A bogie comprises a frame, on which the above-mentioned bolster is mounted.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The connection structure of the present invention adopts a double-sided single hanger and a connecting seat structure, which solves the problem of the traditional connection structure between the bogie and the car body having no restoring torque when passing through a curve, and realizes automatic recovery when the vehicle passes through a curve.

[0019] 2. The connection structure of the present invention adopts the connection hole in the center of the bolster to be rotatably connected to the vehicle body, thereby eliminating the slewing support structure in the traditional connection structure, solving the problem of difficult maintenance of the traditional connection structure and achieving maintenance-free overall structure.

[0020] 3. The connection structure of the present invention utilizes a connection hole at the center of the bolster for rotational connection with the car body and defines the entire upper surface of the bolster as a single continuous plane. This eliminates the slewing bearing structure in conventional connection structures and flattens the overall bolster structure, freeing up more vertical space for the bogie structure design. This solves the problem of insufficient vertical design space for the bogie when the floor surface requirements of rail vehicles are low, while also significantly reducing the overall structural weight of the bolster.

[0021] 4. The bolster of the present invention provides a central connection hole for rotational connection with the vehicle body and forms the entire upper surface of the bolster into a single continuous plane. This eliminates the space required in conventional bolster structures to accommodate the installation of a slewing bearing structure and flattens the overall bolster structure. This adapts to the design requirements of low-floor rail vehicles, significantly reduces the overall weight of the bolster structure, and lowers the difficulty and cost of manufacturing.

[0022] 5. The bogie of the present invention solves the problem of no restoring torque when the vehicle passes through a curve by installing the above-mentioned connection structure on the frame, realizes automatic recovery of the vehicle when passing through the curve, and at the same time realizes maintenance-free overall structure, which can adapt to smaller vertical space installation requirements.

[0023] 6. The bogie of the present invention can meet the lower floor requirements of the vehicle by installing the above-mentioned rocker on the frame, while significantly reducing the weight of the overall structure and lowering the difficulty and cost of manufacturing and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the traditional connection structure;

[0025] Figure 2 is a three-dimensional schematic diagram of the connection structure of the present invention;

[0026] Figure 3 is a side view schematic diagram of the connection structure of the present invention;

[0027] Figure 4 is a schematic top view of the connection structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the main structure of the bolster of the present invention;

[0029] Figure 6 Schematic diagram of the analysis of the restoring torque of the present invention.

[0030] In the figure

[0031] 1. Rocker; 2. Suspension rod; 3. Connecting seat; 31. Articulated rod; 32. Transition rod; 33. Connecting rod; 4. Connecting hole; 5. Rubber joint; 6. Connecting pin; 7. Main plate; 8. Support; 9. Vertical shock absorber mounting seat; 10. Traction mounting seat; 11. Ear plate; 12. Slewing support structure. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of up, down, left, and right in the accompanying drawings and do not limit the structure.

[0033] Example 1

[0034] like Figures 2 to 6As shown, this embodiment provides a connection structure with a restoring torque and connected between the bogie frame and the car body. The connection structure has the advantages of automatic recovery, overall maintenance-free, and adaptability to smaller vertical space installation requirements. The connection structure includes a bolster 1 with a connection hole 4 in the center for rotational connection with the car body, a hanger 2 flexibly hinged or ball-hinged at both ends of the bolster 1, and a connection seat 3 hinged at the lower end of the hanger 2 (i.e., the end away from the bolster 1) and fixed to the car body. The connection hole 4 is used to rotationally connect the bolster 1 to the car body of the light rail vehicle. The bottom of the bolster 1 is fixedly mounted on the bogie frame. The hanger 2 and the connection seat 3 are symmetrically located at the left and right ends of the bolster 1 in the horizontal direction (i.e., perpendicular to the direction of vehicle movement). The connection seat 3 is fixed to a vertical plane and is fixed to the car body (the side beam at the bottom of the car body) by bolts. When a vehicle negotiates a curve, this connection structure utilizes the vertical height difference created by the longitudinal swing of the boom 2 around the vehicle body connection node, generating a restoring torque through its own gravity. This solves the problem of traditional connection structures lacking a restoring torque when navigating curves. The smaller the curve and the greater the height difference, the greater the restoring torque, which meets actual operational requirements.

[0035] In this embodiment, the connecting base 3 includes an articulated rod 31 hinged to the boom 2, a transition rod 32 fixed to the articulated rod 31, and a connecting rod 33 fixed to the transition rod 32 and fixed to the vehicle body. The middle portion of the articulated rod 31 is hinged to the lower end of the boom 2 via a connecting pin 6. This articulation can be a single-axis articulation, and the connecting pin 6 is a metal cylindrical pin. The transition rod 32 is integrally fixed to both ends of the articulated rod 31, and the overall shape is V-shaped, or an inverted figure eight, or U-shaped. The connecting rod 33 is symmetrically arranged at both ends of the articulated rod 31 and is integrally fixed to the transition rod 32. The connecting rod 33 is fixed to the bottom of the vehicle body via bolts.

[0036] In this embodiment, the upper end of the suspension rod 2 (i.e., the end close to the bolster 1) is hinged to the end of the bolster 1 by a rubber joint 5. The rubber joint 5 acts as a flexible hinge, which realizes motion compensation with limited freedom through elastic deformation. The rubber joint 5 can also play a buffering role. The rubber joint 5 adopts a conventional product on the market. The connection hole 4 in the center of the bolster 1 is a pin hole, and the bolster 1 is connected to the center pin on the vehicle body through the center pin hole. Since the slewing support structure 12 in the traditional connection structure is eliminated, the present connection structure does not require regular maintenance; and even if the rubber joint 5 is provided, the present connection structure can be maintenance-free for a longer period of time. At the same time, even if maintenance is performed, there is no need to lift a vehicle (maintenance operations can be performed directly on the outside of the vehicle), which is convenient to operate and easy to maintain. In this way, the present connection structure solves the problem of difficult maintenance of the traditional connection structure and realizes maintenance-free overall structure.

[0037] In this embodiment, if Figure 2 and Figure 5As shown, the entire upper surface of the bolster 1 forms a single, continuous plane, flattening the entire structure of the bolster 1. By eliminating the space required to accommodate the slewing support structure 12 in the conventional bolster 1 and modifying the conventional structure, which is lower in the center and higher on the sides, more vertical space is allocated for the bogie structure, adapting to the vehicle's lower floor requirements. This significantly reduces the overall weight of the bolster 1, lowering the manufacturing complexity and cost. The bolster 1 comprises a main plate 7 with a central pinhole, a support 8 secured to the bottom of the main plate 7, vertical shock absorber mounting blocks 9 and traction mounting blocks 10 secured to the longitudinal ends of the main plate 7 (parallel to the vehicle's direction of travel), and lugs 11 secured to the transverse ends of the main plate 7. The main plate 7 comprises upper and lower cover plates, as well as left, front, right, and rear side panels positioned between and surrounding the upper and lower cover plates. The upper cover is a flat plate with a smooth surface. Its entire upper surface forms a single, continuous plane, and a pinhole is located in the center of the upper cover. A support 8 is fixed to the bottom of the lower cover. A vertical damper mounting base 9 is fixed to the left end of the front side panel, and a traction mounting base 10 is fixed to the right end of the front side panel. Conversely, a traction mounting base 10 is fixed to the left end of the rear side panel, and a vertical damper mounting base 9 is fixed to the right end of the rear side panel. Lugs 11 are fixed to the left and right side panels, respectively. A hole is provided in the center of each lug 11 for mounting the rubber joint 5, which is used for articulation with the boom 2.

[0038] In this embodiment, if Figure 6 As shown in the figure, the formation principle or calculation formula of the restoring torque is as follows:

[0039] F=G*tanθ,

[0040] M=F*L,

[0041] Where G is the gravity of the boom 2 and the vehicle body, θ is the deflection angle caused by the longitudinal swing of the boom 2 around the vehicle body connection node, F is the gravity component (formed by the vertical height difference caused by the longitudinal swing of the boom 2 around the vehicle body connection node), i.e., the restoring force, L is the center span of the boom 2 at the lateral ends of the bolster 1, and M is the restoring moment.

[0042] Through the analysis of the above formula, it can be seen that: the larger the angle (or the greater the vertical height difference caused by the longitudinal swing of the boom 2 around the vehicle body connection node), the greater the restoring torque, which meets the actual operation requirements.

[0043] It should be noted that the connecting seat 3 is fixed, and the upper end of the suspension rod 2 deflects and swings following the rotation of the bolster 1, that is, the deflection and swing of the upper end of the suspension rod 2 includes both rotation in the horizontal plane and rotation in the vertical plane. Therefore, the above calculation and analysis is only a rough analysis (roughly calculating or estimating the force conditions in the vertical plane, and deriving or further explaining the relationship between the restoring torque and the deflection angle or the vertical height difference).

[0044] The beneficial effects of this embodiment are as follows: by adopting a double-sided single hanger 2 and a connecting seat 3 structure, this connection structure can solve the problem of the traditional bogie-car body connection structure having no restoring torque when passing through a curve, and realize automatic restoration of the vehicle when passing through a curve. By adopting the connection hole 4 in the center of the bolster 1 for rotational connection with the car body, this connection structure eliminates the slewing support structure 12 in the traditional connection structure, solves the problem of difficult maintenance of the traditional connection structure, and realizes maintenance-free overall structure. By adopting the connection hole 4 in the center of the bolster 1 for rotational connection with the car body and setting the entire upper surface of the bolster 1 as a single continuous plane, this connection structure solves the problem of the vertical design space of the bogie being difficult to meet the requirements when the floor surface of the rail vehicle is low. At the same time, it significantly reduces the overall structural weight of the bolster 1, reducing the difficulty and cost of manufacturing and processing.

[0045] Example 2

[0046] This embodiment provides a bogie including the connection structure of the above-mentioned embodiment 1. The bogie includes a frame and a connection structure installed on the frame.

[0047] In this embodiment, the bolster 1 and the frame in the connection structure are connected via springs.

[0048] The beneficial effect of this embodiment is that it provides a bogie, which solves the problem of no restoring torque when the vehicle passes through a curve by installing the above-mentioned connection structure on the frame, realizes automatic recovery when the vehicle passes through the curve, and at the same time realizes maintenance-free overall structure, which can adapt to smaller vertical space installation requirements.

[0049] Example 3

[0050] This embodiment provides a bolster 1 connected between a bogie frame and a vehicle body. The bolster 1 has a connection hole 4 at its center for rotational connection with the vehicle body, and the entire upper surface of the bolster 1 forms a single continuous plane.

[0051] In this embodiment, the bolster 1 comprises a main body panel 7 with a central connection hole 4, a support 8 secured to the bottom of the main body panel 7, and vertical shock absorber mounting blocks 9 and traction mounting blocks 10 secured to the longitudinal ends of the main body panel 7 (parallel to the vehicle's direction of travel). The connection hole 4 is a pin hole for connection to a center pin on the vehicle body. The upper surface of the main body panel 7 is flat, or in other words, the entire upper surface of the main body panel 7 forms a single, continuous plane.

[0052] In this embodiment, the bolster 1 further includes ear plates 11 fixed to both ends of the main body plate 7 in the transverse direction (perpendicular to the direction of movement of the vehicle), and a hole for mounting the rubber joint 5 is opened in the middle of the ear plate 11.

[0053] In this embodiment, if Figure 2 and Figure 5 As shown, the main body plate 7 includes an upper cover plate and a lower cover plate arranged above and below, and a left side plate, a front side plate, a right side plate, and a rear side plate located between and around the upper cover plate and the lower cover plate. The upper cover plate is a flat plate with a smooth surface. The entire upper surface of the upper cover plate constitutes a single continuous plane, and a pin hole is provided in the center of the upper cover plate. The support 8 is fixed to the bottom of the lower cover plate. A vertical shock absorber mounting seat 9 is fixed to the left end of the front side plate, and a traction mounting seat 10 is fixed to the right end of the front side plate. Relatively, a traction mounting seat 10 is fixed to the left end of the rear side plate, and a vertical shock absorber mounting seat 9 is fixed to the right end of the rear side plate. Ear plates 11 are respectively fixed to the side surfaces of the left and right panels for hinged connection with the boom 2.

[0054] The beneficial effects of this embodiment are as follows: by eliminating the space designed for the installation of the slewing support structure 12 in the traditional bolster 1 structure and flattening the overall structure of the bolster 1, the present bolster 1 can meet the design requirements of low-floor rail vehicles, while significantly reducing the overall structural weight of the bolster 1 and reducing the difficulty and cost of manufacturing and processing.

[0055] Example 4

[0056] This embodiment provides a bogie including the bolster 1 of the third embodiment. The bogie includes a frame and a bolster 1 mounted on the frame.

[0057] In this embodiment, the bolster 1 is connected to the frame via a spring.

[0058] The beneficial effect of this embodiment is that it provides a bogie that can adapt to the lower floor surface requirements of the vehicle by installing the rocker 1 on the frame, while significantly reducing the weight of the overall structure and reducing the difficulty and cost of manufacturing and processing.

[0059] The contents described in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent modifications to the embodiments made by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A connection structure comprising a bolster (1), wherein the bolster (1) is rotatably connected to a vehicle body, characterized in that: Both ends of the bolster (1) are connected to a suspension rod (2) via a flexible hinge or a ball hinge, and one end of the suspension rod (2) away from the bolster (1) is hinged to a connecting seat (3), and the connecting seat (3) is fixed to the vehicle body.

2. The connection structure according to claim 1, characterized in that: The connecting seat (3) comprises an articulated rod (31) articulated to the suspension rod (2), a transition rod (32) fixed to the articulated rod (31), and a connecting rod (33) fixed to the transition rod (32); the connecting rod (33) is fixed to the vehicle body.

3. The connection structure according to claim 1, characterized in that: A connection hole (4) is provided at the center of the bolster (1), and the bolster (1) is rotatably connected to the vehicle body via the connection hole (4).

4. The connection structure according to claim 3, characterized in that: The entire upper surface of the bolster (1) forms a single continuous plane.

5. A bolster, characterized in that: A connection hole (4) for rotational connection with the vehicle body is provided at the center of the bolster (1), and the entire upper surface of the bolster (1) forms a single continuous plane.

6. A bogie comprising a frame, characterized in that: The connecting structure according to any one of claims 1 to 4 is installed on the frame.

7. A bogie comprising a frame, characterized in that: The bolster (1) as claimed in claim 5 is mounted on the frame.

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