JP7562879B2 - bogie - Google Patents

Description

This application relates to the technical field of railway vehicles, specifically bogies.

This application claims priority to a Chinese patent application filed with the China Patent Office on July 2, 2021, bearing application number 2021107531321 and entitled "BOGY", the entire contents of which are incorporated herein by reference.

Generally, hinged bogies have a large wheelbase, up to 2.9 meters, because they carry two car bodies. This means that they are poor at turning tight curves, the rims wear out quickly, and there are large direct and indirect losses, such as the need to suspend service due to wheel shape correction and replacement.

The present application aims to provide a bogie that has a smaller wheelbase, improves the ability to negotiate small curves, and further reduces rim wear and extends the shape modification cycle to save costs.

To solve the above technical problem, the present application provides a bogie, comprising a hinge mechanism and two side beams extending along a longitudinal direction and spaced apart in a transverse direction, with two transverse beams connected between the two side beams and spaced apart in a longitudinal direction, the transverse beams including a middle segment and edge segments on either side of the middle segment, a longitudinal beam connected between ends of the two middle segments on the same side in a transverse direction, the hinge mechanism being attached to the two longitudinal beams, and at least a portion of the edge segments gradually sloping inward in a transverse direction away from the middle segments.

The above structure provides a large longitudinal pitch between the two middle segments to provide space for the attachment of the hinge mechanism, and at least a portion of both edge segments are gradually inclined laterally inward away from the middle segments to provide space for the brake mechanism, reduce the wheelbase of the bogie, enhance its ability to negotiate tight curves, reduce rim wear, extend the shape modification cycle, and save costs.

Preferably, the vertical size of the connection between the intermediate segment and the edge segment is smaller than the vertical size of the connection between the side beam and the edge segment, and the vertical size of at least a portion of the edge segment gradually decreases in the lateral direction away from the intermediate segment.

Preferably, the edge segments are box beam structures and the intermediate segments are tube beam structures.

Preferably, each of the side beams is provided with two sets of air spring units spaced apart along the longitudinal direction, each set of the air spring units includes at least one air spring, and the air springs are arranged to be connected in series.

Preferably, each of the air springs is provided with an orifice, and the bogie is not provided with a vertical vibration damping device.

Preferably, the hinge connection mechanism includes a first hinge connection base and a second hinge connection base, the first hinge connection base includes two supports arranged with a gap between them in the horizontal direction, the supports are provided with a support groove with an upward opening, and the vertical size of at least a portion of the support groove gradually decreases from top to bottom, the second hinge connection base is used to attach the core shaft, support parts are formed at both ends of the core shaft in the axial direction, and the vertical size of at least a portion of the support parts gradually decreases from top to bottom, and in an assembled state, at least a portion of the vertical wall surface of the portion where the vertical size of the support part gradually decreases contacts at least a portion of the groove side wall of the portion where the vertical size of the support groove gradually decreases.

Preferably, the vertical size of at least the lower end of the support portion gradually decreases from top to bottom, includes two opposing wedge-shaped surfaces, the two wedge-shaped surfaces are connected by a bottom surface, a ridge portion is formed between the wedge-shaped surfaces and the bottom surface, the groove side wall of the support groove includes a first side wall surface and a second side wall surface whose inclination is the same as that of the wedge-shaped surfaces, the first side wall surface is below the second side wall surface, the first side wall surface and the second side wall surface transition by an arc surface, the wedge surface contacts the second side wall surface and protrudes downward from the second side wall surface, and the ridge portion is arranged to be suspended in mid-air.

Preferably, the transition between the bottom wall of the support groove and the first side wall surface is made by an arc surface.

Preferably, a mounting plate for connecting to the vehicle body is provided on one vertical side of the first hinge connection base, and a reinforcing block is provided on the vertical side of the support body away from the mounting plate, with at least a portion of the reinforcing block being above the bottom wall of the support groove.

Preferably, the device further includes a clamping block that is connected to the support and clamps the core shaft.

Preferably, a single traction rod is further connected to the first hinge connection base.

Preferably, the vehicle further includes a rollover prevention torsion bar device including a torsion bar, a torque arm, and a connecting rod, with bearing stands provided at both ends of the torsion bar, the bearing stands attached to the bottom of the edge segment, and the connecting rod located laterally inside the side beam.

Preferably, the bearing base is a parallelogram, and at least a portion of the connecting rod is bent to retract the edge segment.

FIG. 2 is a structural schematic diagram of a specific embodiment of the bogie provided by the present application; FIG. 2 is a plan view of FIG. 1 . This is a diagram of the connection structure of the side beams, cross beams and vertical beams. FIG. 2 is a structural schematic diagram of a hinge connection mechanism. 13 is a local enlarged view of a butting portion between a support portion and a support groove. FIG. FIG. 4 is a structural schematic diagram of a first hinge connection base. FIG. 7 is a front view of FIG. 6 . FIG. 2 is a schematic diagram of the local structure of the bogie provided by the present application at a bottom viewing angle;

In order to help those skilled in the art to better understand the technical solution of this application, the present application will be described in more detail below in conjunction with the drawings and specific examples.

The terms "first," "second," and the like used herein do not imply any particular limitation on order and/or importance, but are merely used for convenience to describe two or more structures or components that are similar or similar in structure and/or function.

In this specification, the running direction of the railway train is defined as the longitudinal direction, the direction perpendicular to the longitudinal direction within the running plane of the railway train is defined as the lateral direction, the direction perpendicular to the running plane of the railway train is defined as the vertical direction, and the vertical direction also refers to the up and down direction, with the direction relatively closer to the running plane being defined as down and the direction relatively farther from the running plane being defined as up.

Referring to Figures 1 to 3, Figure 1 is a structural schematic diagram of a specific embodiment of a bogie provided by the present application, Figure 2 is a plan view of Figure 1, and Figure 3 is a diagram of the connection structure of the side beams, cross beams and longitudinal beams.

As shown in Figures 1 to 3, the present application provides a bogie for connecting a wheel pair 6 to a vehicle body, comprising a hinge connection mechanism 1 and side beams 2 extending along a longitudinal direction and spaced apart laterally, with two transverse beams 3 spaced apart longitudinally connected between the side beams 2, the transverse beams 3 including a middle segment 31 and edge segments 32 on both sides of the middle segment 31, a longitudinal beam 4 connected between ends of both middle segments 31 on the same lateral side, the hinge connection mechanism 1 attached to both longitudinal beams 4, and at least a portion of the edge segments 32 gradually inclining inward in a transverse direction away from the middle segment 31.

Here, "inside" refers to a position relatively close to the longitudinal centerline of the bogie, which is a line that passes through the longitudinal center and extends along the lateral direction.

According to the above structure, the vertical pitch between the two intermediate segments 31 is large, creating space for the installation of the hinge connection mechanism 1, and at least a portion of the two edge segments 32 is gradually inclined inward in a direction away from the intermediate segment 31 in the horizontal direction, creating space for the brake mechanism 7, reducing the wheelbase of the bogie and enhancing the ability to negotiate small curves, and further reducing rim wear and extending the shape modification cycle, thereby saving costs.

Here, the embodiments of the present application do not limit the lateral size of the edge segment 32, the lateral size of the inclined portion of the edge segment 32, and the included angle between the inclined portion of the edge segment 32 and the lateral direction. In concrete implementation, those skilled in the art can select according to actual needs as long as it meets the usage requirements.

Generally, the side beams 2 are provided with air spring units (i.e., air spring units) to support the vehicle body, and to ensure sufficient support performance, the vertical size of both the side beams 2 is increased and the vertical size of the cross beams 3 is reduced, thereby reducing the weight of the bogie.

Thus, the vertical size of the edge segment 32 for connecting the intermediate segment 31 to the side beam 2 may vary to accommodate the difference in vertical size between the intermediate segment 31 and the side beam 2. In particular, the vertical size of the connection point between the intermediate segment 31 and the edge segment 32 is smaller than the vertical size of the connection point between the side beam 2 and the edge segment 32, and the vertical size of at least a portion of the edge segment 32 gradually decreases along the lateral direction away from the intermediate segment 31.

Based on these size requirements, a box-shaped beam structure is used for the edge segment 32, which makes processing easier. In this case, the top and bottom plates of the inclined portion of the edge segment 32 are both approximately parallelograms, and the intermediate segment 31 is a cylindrical beam structure arranged to have equal diameters. The use of a cylindrical beam makes it easier to obtain.

The above solution of adopting a box beam structure for the edge segments 32 and a cylindrical beam structure for the intermediate segments 31 is merely an illustrative example of an embodiment of this application. In concrete implementation, other types of beam structures may be adopted for the edge segments 32 and intermediate segments 31 as long as they do not affect the realization of the function.

As described above, the side beams 2 are usually provided with air spring units for connection to the vehicle body. For a bogie that connects two adjacent vehicle bodies in the vertical direction, each side beam 2 is provided with two sets of air spring units arranged at a distance along the vertical direction, each set of air spring units connects one vehicle body, each set of air spring units includes at least one air spring 21, and when in use, each air spring 21 is arranged to be connected in series.

In this way, the gas in each air spring 21 flows with each other, and the internal pressure of each air spring 21 is kept consistent. In practice, one altitude valve can be used to control the air supply and discharge of each air spring 21, realizing the synchronous lifting and lowering of both sides of the car body, simplifying the control operation, and reducing the vertical load inside the hinge connection mechanism 1 due to the difference in the number of people on both sides of the car body, i.e., the difference in load, improving the load condition of the hinge connection mechanism 1.

Each air spring 21 is provided with an orifice (not shown) and functions as a vertical vibration damping device. Therefore, the bogie provided by the present application does not have a vertical vibration damping device, thereby saving bogie space and reducing manufacturing costs.

Here, each air spring 21 is isolated from the others, and a solution is also possible in which an altitude valve is individually arranged for each air spring 21 to control air replenishment and discharge. Similarly, a solution is also possible in which no orifice is provided in the air spring 21, and a vertical vibration damping device is arranged.

Referring to Figures 4 to 7, Figure 4 is a structural schematic diagram of the hinge connection mechanism, Figure 5 is a localized enlarged view of the butting point between the support portion and the support groove, Figure 6 is a structural schematic diagram of the first hinge connection base, and Figure 7 is a front view of Figure 6.

Furthermore, as shown in FIG. 4, the hinge connection mechanism 1 includes a first hinge connection base 11 and a second hinge connection base 12, the first hinge connection base 11 includes two supports 111 arranged with a gap between them in the horizontal direction, the support 111 is provided with a support groove 111a with an upward opening, and the vertical size of at least a part of the support groove 111a gradually decreases from top to bottom, the second hinge connection base 12 is used to attach the core shaft 121, and support parts 121a are formed at both ends in the axial direction of the core shaft 121, and the vertical size of at least a part of the support part 121a gradually decreases from top to bottom. In the assembled state, at least a part of the vertical wall surface of the part where the vertical size of the support part 121a gradually decreases is in contact with at least a part of the groove side wall of the part where the vertical size of the support groove 111a gradually decreases.

Unlike a solution in which a normal U-shaped groove engages with a circular cross-section core shaft, the solution of the embodiment of the present application in which the support portion 121a, at least a portion of which is arranged to taper from top to bottom, engages with the support groove 111a, better ensures the reliability of the vertical positioning of the core shaft 121, and since the support portion 121a and the groove side wall of the support groove 111a are in surface contact, the force-receiving area is larger, reducing stress concentration and extending the service life of the hinge connection mechanism 1.

Furthermore, as shown in FIG. 5, the vertical size of at least the lower end of the support portion 121a gradually decreases from top to bottom, and includes two wedge-shaped surfaces 121a-1 arranged opposite each other, the two wedge-shaped surfaces 121a-1 are connected by a bottom surface 121a-2, and a ridge portion 121a-3 is formed between the wedge-shaped surfaces 121a-1 and the bottom surface 121a-2. The groove side wall of the support groove 111a is inclined toward the first side wall surface 111a-1. The wedge surface 121a-1 and the second side wall surface 111a-2 are aligned with each other, and the first side wall surface 111a-1 is below the second side wall surface 111a-2, and the first side wall surface 111a-1 and the second side wall surface 111a-2 transition with an arc surface, and the wedge surface 121a-1 contacts the second side wall surface 111a-2 and protrudes downward from the second side wall surface 111a-2, so that the ridge portion 121a-3 is arranged to be suspended in mid-air. In this way, line contact between the support portion 121a and the groove side wall of the support groove 111a is avoided, and the phenomenon of stress concentration is further avoided.

The groove bottom wall 111a-3 and the first side wall surface 111a-1 of the support groove 111a may be transitioned by an arc surface, thereby ensuring a smooth transition between the groove bottom wall 111a-3 and the groove side wall, and further avoiding the occurrence of stress weak points.

Continuing to refer to FIG. 4, a mounting plate 112 is provided on one vertical side of each of the first hinge connection base 11 and the second hinge connection base 12, and the two mounting plates 112 are arranged facing each other in the vertical direction and are respectively connected to the two vehicle bodies.

6 and 7 are combined, and a reinforcing block 113 is further provided on the first hinge connection base 11 on the side of the support 111 away from the mounting plate 112 in the vertical direction, and at least a portion of the reinforcing block 113 is above the bottom wall of the support groove 111a. In this way, the cross-sectional area of the first hinge connection base 11 at the base of the support groove 111a is increased, and the bending and shear resistance section modulus is further increased, so that the support 111 has sufficient load-bearing capacity when transmitting vertical traction force and impact load.

The bogie provided by the present application further includes a clamping block 122 that is connected to the support 111 and clamps the core shaft 121. As shown in FIG. 4, the clamping block 122 is provided with three through holes, and the two through holes on both sides in the vertical direction are connected to the support 111 by assembling connecting members, and the middle through hole is a ditch hole (a vertical hole is provided at the corresponding position of the core shaft 121), which engages with the removal workpiece to provide structural separation between the core shaft 121 and the support 111, solving the problems of difficulty in removal caused by metal inlay, distortion due to interference fit, metal rust, etc.

The tightening block 122 is further provided with downwardly extending hooks at both vertical ends, which can be engaged with the two side walls of the support groove 111a, improving the overall rigidity and loading capacity.

A single traction rod 114 is further connected to the first hinge connection base 11 for transmitting the vertical traction force. Compared to the double rod structure, the single traction rod 114 has a simpler structure, is lighter in weight, is easier to maintain, and is less expensive. Of course, in a specific implementation, the double rod structure can also be adopted.

Refer to Figure 8, which is a schematic diagram of the local structure at the bottom viewing angle of the bogie provided by this application.

The bogie provided by the present application further includes a rollover prevention torsion bar device 5 including a torsion bar 51, a torque arm 52, and a connecting rod 53, and bearing stands 511 are provided on both ends of the torsion bar 51. Here, there are no limitations on the connection structure of the torsion bar 51, the torque arm 52, the connecting rod 53, and the bearing stand 511, and in a specific implementation, a person skilled in the art may refer to the prior art for arrangement.

Specifically, in the embodiment of the present application, as shown in FIG. 8, the bearing base 511 is attached to the bottom of the edge segment 32, which makes it easy to install, remove and maintain, and the connecting rod 53 is located laterally inside the side beam 2, thereby reducing the lateral size of the connecting rod 53, effectively saving the bogie space and further reducing the inter-spring mass of the bogie.

Because the edge segment 32 has an inclined portion, the bearing base 511 forms a parallelogram to fit the bottom plate of the edge segment 32. At least a portion of the connecting rod 53 has a bend, which avoids the inclined design of the edge segment 32.

The above is only a preferred embodiment of the present invention, and those skilled in the art may make some improvements and modifications without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

1...hinge connection mechanism;
11 ... First hinge connection base;
111...Support;
111a...Support groove;
111a-1...first side wall surface;
111a-2...Second side wall surface;
111a-3...Groove bottom wall;
112 ...Mounting plate;
113 ... Reinforcing block;
114 ... Single traction rod;
12 ...Second hinge connection base;
121 ... Core shaft;
121a...Support part;
121a-1...cuneiform surface;
121a-2 ...bottom surface;
121a-3...ridge;
122 ... Clamping block;
2...Side beam;
21 ...Air spring;
3 ... cross beam;
31 ... intermediate segment;
32...edge segment;
4...Vertical beam;
5... anti-rollover torsion bar device;
51 ...torsion bar;
511 ... bearing stand;
52 ...torque arm;
53 ...Connecting rod;
6...Ring pair;
7...Brake mechanism.

Claims (12)

A bogie comprising a hinge mechanism (1) and two side beams (2) extending along a longitudinal direction and spaced apart in a transverse direction, with two transverse beams (3) connected between the two side beams (2), the transverse beams (3) including a middle segment (31) and edge segments (32) on either side of the middle segment (31), a longitudinal beam (4) connected between ends of the two middle segments (31) on the same side in a transverse direction, the hinge mechanism (1) being attached to the two longitudinal beams (4), at least a part of the edge segments (32) gradually inclining inwardly along a direction away from the middle segments (31) in a transverse direction ,
The bogie further comprises an anti-rollover torsion bar device (5) including a torsion bar (51), a torque arm (52), and a connecting rod (53), wherein bearing stands (511) are provided at both ends of the torsion bar (51), the bearing stands (511) are attached to the bottom of the edge segment (32), and the connecting rod (53) is located laterally inside the side beam (2) . The bogie of claim 1, characterized in that the vertical size of the connection between the intermediate segment (31) and the edge segment (32) is smaller than the vertical size of the connection between the side beam (2) and the edge segment (32), and the vertical size of at least a part of the edge segment (32) gradually decreases along a lateral direction away from the intermediate segment (31). The bogie described in claim 2, characterized in that the edge segment (32) is a box beam structure and the intermediate segment (31) is a cylindrical beam structure. The bogie described in claim 1, characterized in that each side beam (2) is provided with two sets of air spring units arranged at a distance along the longitudinal direction, each set of the air spring units includes at least one air spring (21), and each of the air springs (21) is arranged to be connected in series. The bogie described in claim 4, characterized in that each of the air springs (21) is provided with an orifice, and the bogie is not provided with a vertical vibration damping device. The hinge connection mechanism (1) includes a first hinge connection base (11) and a second hinge connection base (12), the first hinge connection base (11) includes two supports (111) arranged at a distance in the horizontal direction, the support (111) is provided with a support groove (111a) whose opening faces upward, and the vertical size of at least a part of the support groove (111a) gradually decreases from top to bottom, the second hinge connection base (12) is used to attach a core shaft (121), and the core shaft ( The bogie according to any one of claims 1 to 5, characterized in that support parts (121a) are formed at both axial ends of the support groove (121), the vertical size of at least a part of the support part (121a) gradually decreases from top to bottom, and in an assembled state, at least a part of the vertical wall surface of the part of the support part (121a) where the vertical size gradually decreases contacts at least a part of the groove side wall of the part of the support groove (111a) where the vertical size gradually decreases. The vertical size of at least the lower end of the support portion (121a) gradually decreases from top to bottom, and the support portion (121a) includes two wedge-shaped surfaces (121a-1) arranged opposite to each other, the two wedge-shaped surfaces (121a-1) are connected by a bottom surface (121a-2), and a ridge portion (121a-3) is formed between the wedge-shaped surfaces (121a-1) and the bottom surface (121a-2);
The bogie of claim 6, characterized in that the groove side wall of the support groove (111a) includes a first side wall surface (111a-1) and a second side wall surface (111a-2) whose inclination is the same as that of the wedge-shaped surface (121a-1), the first side wall surface (111a-1) is below the second side wall surface (111a-2), the first side wall surface (111a-1) and the second side wall surface (111a-2) transition to each other by an arc surface, and the wedge-shaped surface (121a-1) contacts the second side wall surface (111a-2) and protrudes downward from the second side wall surface (111a-2), so that the ridge portion (121a-3) is arranged in a suspended state. The bogie described in claim 7, characterized in that the groove bottom wall (111a-3) of the support groove (111a) and the first side wall surface (111a-1) transition by an arc surface. The bogie described in claim 6, characterized in that a mounting plate (112) for connecting to the car body is provided on one longitudinal side of the first hinge connection base (11), a reinforcing block (113) is provided on the longitudinal side of the support (111) away from the mounting plate (112), and at least a portion of the reinforcing block (113) is located above the groove bottom wall (111a-3) of the support groove (111a). The bogie of claim 6, further comprising a clamping block (122) connected to the support (111) for clamping the core shaft (121). The bogie of claim 6, characterized in that a single traction rod (114) is further connected to the first hinged connection base (11). 2. The bogie according to claim 1 , characterized in that the bearing base (511) is parallelogram-shaped and at least a portion of the connecting rod (53) is bent to retract the edge segment (32).

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