Single-shaft radial bogie of railroad tractor

Abstract

The utility model relates to the technical field of urban rail transit equipment manufacturing, in particular to a single-shaft radial bogie of a rail tractor, which comprises a first wheel pair, a second wheel pair, a first wheel pair and a second wheel pair, the radial bogie assemblies are respectively arranged on the first wheel pair and the second wheel pair in groups; the connecting rod component is arranged between the two radial bogie assemblies in a cable-stayed mode and used for enabling the first wheel pair and the second wheel pair to reach the regional radial position when the frame passes through a curve; and the traction assembly unit is used for enabling the two radial bogie assemblies in groups to stably rotate with the frame. When passing through a curve, the first wheel pair can generate an attack angle with the steel rail under the guide action of the steel rail, and at the moment, the second wheel pair is pulled under the pulling action of the connecting rod component to form a reverse attack angle with the steel rail, so that the radial positions of two wheel pair areas are reached, and the limitation of the length of a vehicle is avoided; the device can be applied to a two-shaft track tractor needing to pass through a small curve radius.

Description

Technical Field

[0001] The utility model relates to the technical field of urban rail transportation equipment manufacturing, in particular to a single-axle radial bogie for a rail tractor. Background Art

[0002] Radial bogies, designed based on conventional bogies to improve a vehicle's ability to negotiate curves, are widely used on freight trains, quasi-high-speed trains, and tilting trains. In recent years, they have begun to be used on urban rail transit vehicles to reduce wheel-rail wear and improve operational safety. Compared to conventional bogies, radial bogies differ in their ability to negotiate curves. They can achieve a smaller angle of attack when negotiating curves, reducing the lateral force on the first wheelset and helping to reduce wheel-rail wear.

[0003] However, in actual application, the existing radial bogies cannot be used normally due to the limitation of vehicle length, and cannot be used on two-axle rail tractors that need to pass through small curve radii.

[0004] The above content is only used to assist in understanding the technical solution of the present invention and does not mean that the above content is the closest prior art. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned deficiencies and provide a single-axle radial bogie for a rail tractor.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: a single-axle radial bogie for a rail tractor, comprising:

[0007] The first wheel pair and the second wheel pair are used to drive the frame to guide and walk on the rails;

[0008] Radial bogie assemblies, arranged in groups on the first wheelset and the second wheelset;

[0009] A connecting rod member is obliquely arranged between the two radial bogie assemblies, and is used to enable the first wheelset and the second wheelset to reach a regional radial position when the frame passes through a curve;

[0010] The traction assembly unit is arranged on the radial bogie assembly and is used to enable the two radial bogie assemblies in a group to rotate smoothly with the frame.

[0011] Furthermore, the radial bogie assembly as a whole presents a frame structure when viewed from above, and the radial bogie assembly includes two relatively distributed main beams, a traction beam, an end beam, and an outer end beam arranged between the two main beams and distributed in sequence, and two symmetrical auxiliary beams are arranged between the traction beam and the end beam and in the area enclosed by the two main beams.

[0012] Furthermore, it also includes:

[0013] The side bearing assembly unit is detachably arranged on the main beam. Two side bearing assembly units are arranged on the radial bogie assembly on one side and the two side bearing assembly units are placed on the same center line to overcome the torque on the frame when the first wheelset and the second wheelset are pulling.

[0014] Furthermore, the main beam is also provided with side stop pins for limiting the lateral movement of the radial bogie assembly and stabilizing the position of the radial bogie assembly.

[0015] Furthermore, support frames for fixing and supporting the intersection of the two ends of the outer end beam and the main beam are provided at the positions where the two sides of the outer end beam intersect with the main beam.

[0016] Furthermore, the end beam is provided with two brake seats located around the first wheelset or the second wheelset.

[0017] Furthermore, booms for connecting to the vehicle frame are provided on both sides of the upper plane portion of the end beam.

[0018] Furthermore, a hanging plate is provided at the intersection of the traction beam and the auxiliary beam, and a hanging rib is provided on the hanging plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the present invention is provided with a connecting rod component that is obliquely pulled between two radial bogie assemblies in a group. When the frame of this embodiment passes through a curve, the first wheelset will be guided by the rail and generate an impact angle with the rail. At this time, the second wheelset is pulled under the pulling action of the connecting rod component to form a reverse impact angle with the rail, and finally the radial position of the two wheelset areas is reached. Compared with ordinary bogies and conventional radial bogies, not only the impact angle when passing through the curve is reduced, but also it is not limited by the vehicle length. It can be applied to two-axle rail tractors that need to pass through a small curve radius; and through the traction assembly unit provided, the center traction pin installed at this position can achieve the minimum extension and contraction of the drive shaft, so that the two radial bogie assemblies used in the group can rotate smoothly with the frame, so as to achieve the purpose of passing a small curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall front cross-sectional plan structure of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the overall top-view cross-sectional plan structure of an embodiment of the present utility model;

[0023] Figure 3 for Figure 2 Schematic diagram of the planar structure of the middle AA section side view;

[0024] Figure 4 for Figure 2 Schematic diagram of the planar structure of the middle BB section side view;

[0025] Figure 5 for Figure 2 Schematic diagram of the planar structure of the middle CC section side view;

[0026] Figure 6 This is a schematic side planar structural diagram of a connecting rod component according to an embodiment of the present invention.

[0027] In the figure: 1. First wheelset; 2. Second wheelset; 3. Radial bogie assembly; 31. Main beam; 32. Traction beam; 33. End beam; 34. Outer end beam; 35. Auxiliary beam; 4. Connecting rod member; 5. Traction assembly unit; 6. Side bearing assembly unit; 7. Side stop pin; 8. Support frame; 9. Brake seat; 10. Boom; 11. Suspension plate; 12. Suspension rib plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. 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.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] like Figure 1-6 As shown, the utility model is a single-axle radial bogie for a rail tractor, comprising:

[0032] The first wheel pair 1 and the second wheel pair 2 are used to drive the frame to guide and walk on the rails;

[0033] Radial bogie assemblies 3, which are arranged in groups on the first wheelset 1 and the second wheelset 2;

[0034] A connecting rod member 4 is obliquely arranged between the two radial bogie assemblies 3, and is used to enable the first wheelset 1 and the second wheelset 2 to reach a regional radial position when the frame passes through a curve;

[0035] The traction assembly unit 5 is provided on the radial bogie assembly 3 and is used to enable the two radial bogie assemblies 3 in a group to rotate smoothly with the vehicle frame.

[0036] In a specific implementation, a single-axle radial bogie is formed by installing the first wheelset 1 and the second wheelset 2 respectively under the two radial bogie assemblies 3 used in a group. The single-axle radial bogie can drive the frame connected to the two radial bogie assemblies 3 used in a group to guide and walk on the rail. When the frame with the two radial bogie assemblies 3 used in a group passes through a curve, the first wheelset 1 is guided by the rail to generate an attack angle with the rail, and the connecting rod member 4 connected by the oblique assembly between the two radial bogie assemblies 3 used in a group is used to pull the second wheelset 2 to form a reverse attack angle with the rail, so as to achieve the radial position of the two wheelset areas. When passing through the curve, the central traction pin installed on the traction assembly unit 5 can achieve the minimum extension and contraction of the drive shaft, so that the two radial bogie assemblies 3 used in a group rotate smoothly with the frame to achieve the purpose of passing through a small curve. Not only does this embodiment have a smaller attack angle than an ordinary bogie when passing through a curve, reducing the lateral force of the first wheelset and alleviating wheel-rail wear, but it is also not limited by vehicle length compared to conventional radial bogies and can be applied to two-axle rail tractors that need to pass through a small curve radius.

[0037] In one embodiment, the radial bogie assembly 3 has an overall frame structure when viewed from above. The radial bogie assembly 3 includes two oppositely spaced main beams 31, a traction beam 32, an end beam 33, and an outer end beam 34 disposed sequentially and spaced apart between the two main beams 31. Two symmetrical auxiliary beams 35 are disposed between the traction beam 32 and the end beam 33 and within the area enclosed between the two main beams 31. This design utilizes methods including, but not limited to, welding to vertically and sequentially space the traction beam 32, the end beam 33, and the outer end beam 34. Furthermore, the two auxiliary beams 35 welded between the traction beam 32 and the end beam 33 are positioned within the area enclosed by the two parallel, opposing main beams 31, forming a stable structure connecting the vehicle frame with the first and second wheelsets 1 and 2. This facilitates the subsequent assembly of related structures onto the radial bogie assembly 3 and provides excellent support.

[0038] It should be noted that before welding, each beam body formed on the radial bogie assembly 3 needs to be pre-treated by shot blasting and rust removal, and after welding, the welds need to be manually rust-removed and sprayed with weldable non-toxic anti-rust primer.

[0039] In one embodiment, it further includes:

[0040] The side bearing assembly unit 6 is detachably mounted on the main beam 31. Two side bearing assembly units 6 are provided on one side of the radial bogie assembly 3, and are co-located on the same centerline. These units are used to overcome torque applied to the vehicle frame during traction by the first and second wheelsets 1 and 2. This design, by bolting the side bearing assembly units 6 to the main beam 31 and bolting side bearing wear plates to the side bearing assembly units 6, overcomes torque applied to the vehicle frame during traction by the first and second wheelsets 1 and 2 on the rails, effectively ensuring smooth operation of the vehicle frame of this embodiment.

[0041] It should be noted that the side bearing wear plate is made of polytetrafluoroethylene with a sliding friction coefficient of 0.1, which effectively reduces the rotational resistance of the radial bogie assembly 3.

[0042] In one embodiment, the main beam 31 is further provided with a side stop pin 7 for limiting the lateral movement of the radial bogie assembly 3 and stabilizing the position of the radial bogie assembly 3. Figure 2 The side stop pin 7 welded at the position shown can prevent the lateral deviation of the two radial bogie assemblies 3 used in a group from the relative movement of the first wheel pair 1, the second wheel pair 2 and the rail during the guided walking process on the rail. When the two radial bogie assemblies 3 used in a group undergo lateral displacement, the side stop pin 7 will contact specific components or pads to limit further lateral movement, thereby stabilizing the position of the two radial bogie assemblies 3 used in the group.

[0043] In one embodiment, pallet frames 8 are provided at the intersections of the outer end beams 34 and the main beams 31 on both sides thereof, for fixedly supporting the intersections of the outer end beams 34 and the main beams 31. This design, by welding the pallet frames 8 to the locations where the outer end beams 34 are welded to the main beams 31 on both sides thereof, can stably support the radial bogie assembly 3 and achieve good support strength.

[0044] In one embodiment, two brake shoes 9 are provided on the end beam 33 and are located around the first wheelset 1 or the second wheelset 2. With this design, by installing the brake shoes 9 on the end beam 33 and around the wheels formed on the first wheelset 1 or the second wheelset 2, when the braking system is activated, the brake shoes 9 help to evenly distribute the braking force to the wheels formed on the first wheelset 1 or the second wheelset 2, thereby improving braking efficiency and stability.

[0045] In one embodiment, booms 10 for connection to the vehicle frame are provided on both sides of the upper flat portion of the end beam 33. This design allows the booms 10, mounted on both sides of the upper flat portion of the end beam 33, to support the weight of the two radial bogie assemblies 3 used in a group and connect them to the vehicle frame. Furthermore, by controlling the longitudinal and lateral movement of the radial bogie assemblies 3, the booms 10 help maintain good contact between the wheels of the first wheelset 1 or the second wheelset 2 and the rails, thereby ensuring stability.

[0046] It should be noted that the boom 10 allows the two radial bogie assemblies 3 used in a group to move freely within a certain range in the frame, thereby adapting to the curve of the rail and the changes in the wheels, and reducing the impact of lateral force on the frame.

[0047] In one embodiment, a hanging plate 11 is provided at the intersection of the traction beam 32 and the auxiliary beam 35, and a hanging rib 12 is provided on the hanging plate 11. This design enhances the overall strength of the hanging plate 11 by welding the hanging rib 12 to the auxiliary beam 35 at the location where it is welded to the traction beam 32. Furthermore, the welded hanging plate 11 facilitates the hanging operation by utilizing the pre-machined hanging holes.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A single-axle radial bogie for a railway tractor, characterized in that: include: The first wheel pair (1) and the second wheel pair (2) are used to drive the vehicle frame to guide and travel on the rails; Radial bogie assemblies (3) are respectively arranged in groups on the first wheel set (1) and the second wheel set (2); A connecting rod member (4) is obliquely arranged between the two radial bogie assemblies (3) and is used to enable the first wheel set (1) and the second wheel set (2) to reach a regional radial position when the frame passes through a curve; The traction assembly unit (5) is arranged on the radial bogie assembly (3) and is used to enable the two radial bogie assemblies (3) in a group to rotate smoothly with the vehicle frame.

2. The single-axle radial bogie for a railway tractor according to claim 1, characterized in that: The radial bogie assembly (3) is a frame structure in a top view. The radial bogie assembly (3) comprises two main beams (31) that are relatively distributed, a traction beam (32) that is arranged between the two main beams (31) and is sequentially spaced, an end beam (33), and an outer end beam (34). Two symmetrical auxiliary beams (35) are arranged between the traction beam (32) and the end beam (33) and in an area enclosed between the two main beams (31).

3. The single-axle radial bogie of a railway tractor according to claim 2, characterized in that: Also includes: A side bearing assembly unit (6) is detachably arranged on the main beam (31), and two side bearing assembly units (6) are arranged on the radial bogie assembly (3) on one side, and the two side bearing assembly units (6) are placed on the same center line, and are used to overcome the torque on the frame when the first wheelset (1) and the second wheelset (2) are towing.

4. The single-axle radial bogie for a railway tractor according to claim 3, characterized in that: The main beam (31) is also provided with a side stop pin (7) for limiting the lateral movement of the radial bogie assembly (3) and stabilizing the position of the radial bogie assembly (3).

5. The single-axle radial bogie for a railway tractor according to claim 2, characterized in that: A support frame (8) for fixing and supporting the intersection of the two ends of the outer end beam (34) and the main beam (31) is provided at the intersection of the two sides of the outer end beam (34) and the main beam (31).

6. The single-axle radial bogie for a railway tractor according to claim 2, characterized in that: The end beam (33) is provided with two brake seats (9) located around the first wheel pair (1) or the second wheel pair (2).

7. The single-axle radial bogie for a railway tractor according to claim 2, characterized in that: Suspension arms (10) for connecting to a vehicle frame are provided on both sides of the upper plane portion of the end beam (33).

8. The single-axle radial bogie for a railway tractor according to claim 2, characterized in that: A hanging plate (11) is provided at the intersection of the traction beam (32) and the auxiliary beam (35), and a hanging rib plate (12) is provided on the hanging plate (11).

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