Railway vehicle wheelset radial apparatus and bogie thereof

Abstract

Disclosed in the present invention are a railway vehicle wheelset radial apparatus and a bogie thereof. The wheelset radial apparatus is formed by two auxiliary frames arranged front and back and two cross-arranged connecting rods, wherein the two auxiliary frames and the two connecting rods connected by round pins; the auxiliary frame is a U-shaped structure, and the middle of each transverse arm of the auxiliary frame sinks to form a surface-recessed structure; the transverse arm of the auxiliary frame is provided with a connecting rod mounting surface, configured to mount the connecting rods; the connecting rods are arranged in a crossed mode, and end portions thereof are located in the rod mounting surfaces and are in pin joint by means of round pins; the bogie comprises a wheelset, a bearing, a bolster component, a side frame component, a foundation braking apparatus, and a wheelset radial apparatus. By using the above wheelset radial apparatus, the connecting rods and the foundation braking apparatus both pass through a bolster assembling hole, the connecting rods are located at the lower side of the foundation braking apparatus, and the depth by which a center pin of the bogie is inserted into the bolster is greater than or equal to 160 mm. According to the present invention, not only the advantages such as good operation stability and excellent curve passing performance are ensured, but also the requirement that the bogie can adapt to assembling of different foundation braking apparatuses is met, so that the adaptability and versatility of the bogie are improved.

Description

A railway vehicle wheelset radial device and bogie thereof Technical Field

[0001] The present invention belongs to the technical field of railway vehicle design, in particular to the technical field of railway vehicle bogie design, and specifically relates to a wheelset radial device and a bogie thereof that can adapt to different basic braking devices. Background Art

[0002] The auxiliary-frame radial bogie is one of the main bogie types for my country's railway freight cars. Composed of two auxiliary frames and two connecting rods pinned together, the wheelset radial assembly couples the motion of the front and rear wheelsets, giving the bogie high shear stiffness and low bending stiffness. Its advantages include excellent running stability in straight lines and excellent curve negotiating performance when operating on curves, making it highly popular with customers.

[0003] Existing domestic railway freight car sub-frame radial bogies typically utilize a structure with a connecting rod extending through the bolster and a lever brake positioned beneath it, in order to meet vehicle lower clearance requirements, space for the basic brake system, and consider the bolster design layout and structural compactness. This technical solution presents the challenge of integrating the brake system.

[0004] Patent application ZL201210180507.0 A sub-frame radial bogie and patent application ZL202122471669.7 A sub-frame radial bogie adaptable to multiple basic braking devices disclose different sub-frame radial bogies. The connecting rods in the radial devices of the two bogie wheelsets cross-pass through the rocker assembly holes and are located below the basic braking devices. This technical solution not only limits the depth of the bogie center pin inserted into the rocker, the insertion depth is generally 70mm to 100mm, but also increases the risk of separation between the vehicle and the bogie during use; and the two sub-frame radial bogies cannot simultaneously assemble lever braking devices and integrated braking devices.

[0005] With the development of railway freight car technology, the application of integrated braking systems is becoming increasingly widespread. Due to the inherent structural characteristics of existing sub-frame radial bogies, they can only be equipped with lever brakes or integrated brakes. To improve the adaptability of sub-frame radial bogies and achieve modular replacement of basic braking systems, it is necessary to study the structural layout of sub-frame radial bogies, design more advanced radial bogies, enhance their compatibility, and achieve technological upgrades.

[0006] Summary of the Invention

[0007] The present invention addresses the deficiencies of the prior art and discloses a wheelset radial device and a bogie thereof for railway vehicles. The present invention aims to provide a wheelset radial device and a bogie thereof with better compatibility and excellent performance, which can adapt to different basic brake devices.

[0008] The present invention is achieved through the following technical solutions:

[0009] The present invention first discloses a radial device for a wheelset of a railway vehicle. The wheelset radial device is composed of two front and rear auxiliary frames and two cross-arranged connecting rods connected by round pins. The device is characterized in that: the auxiliary frame is a U-shaped structure, and the middle part of the auxiliary frame transverse arm is sunken to form a concave structure; the auxiliary frame transverse arm is provided with a connecting rod mounting surface for mounting the connecting rod; the connecting rods are cross-arranged, and the ends are located on the connecting rod mounting surface and are pinned by round pins.

[0010] The present invention further discloses a railway vehicle bogie, comprising a wheelset and bearings, a bolster assembly, a side frame assembly, a basic braking device and a wheelset radial device, characterized in that: the above-mentioned wheelset radial device is adopted, the connecting rod and the basic braking device both pass through the bolster assembly hole, the connecting rod is located on the lower side of the basic braking device, and the depth of the bogie center pin inserted into the bolster assembly is greater than or equal to 160 mm.

[0011] Furthermore, a basic braking device safety chain mounting seat is provided on the inner side of the sub-frame transverse arm and at the junction with the curved arm, and the safety chain is fixed to the safety chain mounting seat by fasteners.

[0012] Furthermore, the bolster assembly hole of the bolster assembly is a high-section rectangular structure, the connecting rod and the basic braking device both pass through the bolster assembly hole, and the connecting rod is located at the lower side of the basic braking device.

[0013] The subframe transverse arm of the present invention has a concave structure with a recessed center section. Its cross-section is an isosceles trapezoidal structure with a depth of 32mm, a width of 300mm at the upper base, and a width of 425mm at the lower base. The upper and lower ends of the concave surface smoothly connect to the arc of the subframe transverse arm. This recessed space effectively prevents interference between the base brake rod / brake adjuster and the upper center plane of the subframe transverse arm during bogie shoe replacement.

[0014] By adopting the wheelset radial device of the present invention, the foundation brake device can be selected as a lever brake device or an integrated brake device.

[0015] The wheelset radial device and bogie thereof of the present invention have the following advantages:

[0016] The bolster assembly hole adopts a high-section rectangular structure and a sub-frame transverse arm sunken structure. The connecting rod and the basic braking device innovatively pass through the bolster assembly hole, and the connecting rod is located below the basic braking device. This makes it suitable for the installation of lever braking devices and integrated braking devices, improves the versatility of the bogie, realizes modular replacement, and is conducive to the technical upgrade of the bogie.

[0017] The connecting rod is located below the basic braking device, and the insertion depth of the bogie center pin is no longer limited by the vertical position of the connecting rod, which increases the insertion depth of the center pin and improves the safety during vehicle operation.

[0018] The sub-frame is provided with a basic brake device safety chain mounting seat, and the safety chain is fixed to the safety chain mounting seat provided on the sub-frame by fasteners to prevent the risk of the basic brake device falling off during vehicle operation.

[0019] A concave structure is set in the center of the auxiliary frame transverse arm, and its cross-section is an isosceles trapezoidal structure to avoid interference between the basic braking device and the upper plane of the center of the auxiliary frame transverse arm when the bogie is replaced.

[0020] The present invention not only ensures the advantages of good operating stability and excellent curve negotiating performance of the sub-frame radial bogie, but also satisfies the requirement that the bogie can adapt to the installation of different basic braking devices, thereby improving the adaptability and versatility of the bogie. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of a wheelset radial device and a bogie thereof according to the present invention.

[0022] FIG2 is a schematic diagram of a bolster according to the present invention.

[0023] FIG3 is a schematic structural diagram of the wheelset radial device of the present invention.

[0024] FIG4 is a schematic diagram of the sub-frame structure of the present invention.

[0025] FIG5 is a schematic diagram of a bogie equipped with a lever brake device according to the present invention.

[0026] FIG6 is a schematic diagram of a bogie equipped with an integrated braking device according to the present invention.

[0027] Figure 7 is a schematic diagram of the structure of an existing sub-frame type radial bogie.

[0028] Among them: 1-wheelset and bearing, 2-side frame composition, 3-rocker composition, 4-basic braking device, 5-wheelset radial device, 6-center pin, 31-rocker assembly hole, 51-auxiliary frame, 52-connecting rod, 53-round pin, 511-transverse arm, 512-connecting rod mounting surface, 513-safety chain mounting seat. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with specific embodiments. The specific embodiments are further explanations of the principles of the present invention and do not limit the present invention in any way. Technologies that are the same or similar to the present invention do not exceed the scope of protection of the present invention.

[0030] Combined with the attached drawings.

[0031] As shown in FIG7 , FIG7 is a conventional railway freight car auxiliary frame type radial bogie, which is mainly composed of components such as wheelsets and bearings, rocker components, side frames, basic braking devices and wheelset radial devices.

[0032] Figures 1 to 6 illustrate the basic structure of the wheelset radial device and bogie according to the present invention, comprising a wheelset and bearings, a bolster assembly, a sideframe assembly, a basic brake system, and a wheelset radial device. The wheelset radial device consists of two front and rear sub-frames connected by two cross-arranged connecting rods via round pins.

[0033] The sub-frame is a U-shaped structure, and the middle part of the sub-frame transverse arm is sunken, which increases the vertical distance between the upper plane of the connecting rod and the center line of the axle, which is conducive to the arrangement of the connecting rod and the basic braking device.

[0034] The sub-frame transverse arm is provided with a connecting rod mounting surface for mounting the connecting rod.

[0035] The connecting rods are arranged crosswise, with the ends placed on the connecting rod mounting surface and connected by round pins.

[0036] The connecting rod and the basic brake device both pass through the rocker assembly hole, and the connecting rod is located at the lower side of the basic brake device, which improves the adaptability of the wheelset radial device and the basic brake device.

[0037] The bolster assembly hole is a high-section rectangular structure, which not only meets the requirements of the installation of connecting rods and different basic brake devices, but also ensures that the bolster, connecting rods and basic brake devices do not interfere with each other under any working conditions.

[0038] The basic brake device is a lever brake device or an integrated brake device.

[0039] The center of the subframe's transverse arm is designed with a concave structure, and its cross-section is an isosceles trapezoid. This effectively prevents interference between the foundation brake and the upper plane of the subframe's transverse arm during bogie shoe replacement. U-shaped safety chain mounting brackets are located on both sides of the subframe. Fasteners secure the safety chain to the brackets, preventing the brake beam from falling off during operation.

[0040] The connecting rod is placed on the lower side of the foundation brake, and the center pin insertion depth is no longer limited by the vertical position of the connecting rod. The center pin insertion depth is 160mm, which improves the safety during vehicle operation.

[0041] This bogie breaks through the conventional radial bogie structure and fully considers vehicle limits. By increasing the cross-sectional height of the bolster assembly hole, reducing the vertical height of the auxiliary frame transverse arm, and adopting a concave structure at the center of the transverse arm, the connecting rod of the wheelset radial device and the basic brake device both pass through the bolster assembly hole. The innovative placement of the connecting rod under the basic brake device allows the bogie to be equipped with various basic brake devices currently in mainstream use. When installing this bogie on a car body, no modification of the existing car body is required, making the entire bogie interchangeable. This not only improves maintenance efficiency, but also saves modification costs and enhances transportation economy.

Claims

1. A radial device for a railway vehicle wheelset, the radial device for the wheelset being composed of two front and rear auxiliary frames and two cross-arranged connecting rods connected by round pins, characterized in that: The sub-frame is a U-shaped structure, and the middle part of the sub-frame transverse arm is sunken to form a concave structure; The sub-frame transverse arm is provided with a connecting rod installation surface for installing the connecting rods; the connecting rods are arranged crosswise, and the ends are located on the connecting rod installation surface and are pinned by round pins.

2. A railway vehicle bogie, comprising a wheelset and bearings, a bolster assembly, a side frame assembly, a basic braking device and a wheelset radial device, characterized in that: The wheelset radial device according to claim 1 is adopted, the connecting rod and the basic braking device both pass through the rocker assembly hole, the connecting rod is located at the lower side of the basic braking device, and the depth of the bogie center pin inserted into the rocker assembly is greater than or equal to 160mm.

3. The railway vehicle bogie according to claim 2, characterized in that: A basic brake device safety chain mounting seat is arranged on the inner side of the sub-frame transverse arm and at the junction with the curved arm, and the safety chain is fixed on the safety chain mounting seat by fasteners.

4. The railway vehicle bogie according to claim 2, characterized in that: The bolster assembly hole of the bolster assembly is a high-section rectangular structure, the connecting rod and the basic braking device both pass through the bolster assembly hole, and the connecting rod is located at the lower side of the basic braking device.

5. The railway vehicle bogie according to claim 2, 3 or 4, characterized in that: The middle part of the sub-frame transverse arm is sunken to form a concave structure, and its cross section is an isosceles trapezoidal structure. The upper and lower ends of the concave surface are smoothly connected to the arc of the sub-frame transverse arm.

6. The railway vehicle bogie according to claim 5, characterized in that: The basic braking device is a lever braking device or an integrated braking device.

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