Meter gauge bogie frame, meter gauge bogie and railway vehicle

Abstract

The meter gauge bogie frame comprises two side beams and a cross beam which are oppositely arranged, and the two ends of the cross beam are fixed to the side beams correspondingly; the supporting plate assembly is located at the bottom of any side beam and extends downwards; brake seat mounting parts are arranged at two longitudinal ends of the supporting plate assembly and are used for mounting a brake device; and a transverse shock absorber mounting part and a hand brake release mounting part are arranged at the longitudinal center of the supporting plate assembly and are used for mounting a transverse shock absorber and a hand brake release device respectively. A brake device, a vibration reduction function and a hand brake release function mounting interface are integrated on the supporting plate assembly, so that one plate has multiple functions; scattered weldments on the framework are reduced, and the integrity is improved; frequent trepanning or small support welding on the side beam main body is avoided, and the fatigue crack risk is reduced; the supporting plate assembly can be integrally reinforced, and the bearing capacity is high.

Description

Technical Field

[0001] This application relates to the technical field of bogies, and particularly to a meter-gauge bogie frame, a meter-gauge bogie and a rail vehicle. Background Art

[0002] The meter-gauge bogie is a special structure designed to adapt to the narrow-gauge railway with a gauge of 1000 mm. The key points of its design are to solve problems such as limited installation space, interference between components, and dynamic performance requirements caused by the reduction of the gauge.

[0003] Due to the influence of the gauge, the braking method of the meter-gauge railway bogie generally adopts tread braking. Or for the bogies of vehicles with higher speeds, in order to meet the requirements of high-speed braking, usually the powered bogie adopts tread braking, and the non-powered bogie adopts axle disc braking or a combination of axle disc and tread braking. As a result, the core components of the powered bogie and the non-powered bogie cannot be completely interchanged, which causes difficulties in design and high design and manufacturing costs.

[0004] The existing meter-gauge bogies are generally of H-type structure, commonly found in powered bogies, and are composed of side beams, cross beams and end tie rods. The box girder structure is adopted to improve the stiffness. The "eye" - shaped bogie frame is commonly found in powered bogies and adopts a closed structure. The end beam and the side beam form an integral body to increase the torsional stiffness. And due to the small inner distance between the wheelsets, a wheel disc brake seat is arranged at the end of the side beam to facilitate the installation of the wheel disc brake caliper. It occupies a large space and is suitable for the bogies of high-speed trains. However, when this structure is applied to low-speed passenger cars, the cost is relatively high. Summary of the Invention

[0005] In the embodiments of this application, a meter-gauge bogie frame, a meter-gauge bogie and a rail vehicle are provided to solve problems such as the installation of a braking device at the end of the side beam of the existing meter-gauge bogie, large occupied space, low space utilization rate, and difficult maintenance.

[0006] In order to achieve the above object, this application provides the following technical solutions: A meter-gauge bogie frame includes: Two relatively arranged side beams and a cross beam, and both ends of the cross beam are respectively fixed to the side beams; A bolster assembly, located at the bottom of any one of the side beams and extending downward; braking seat mounting parts are provided at the longitudinal two ends of the bolster assembly for mounting a braking device; a lateral shock absorber mounting part and a handbrake release mounting part are provided at the center of the longitudinal direction of the bolster assembly for respectively mounting a lateral shock absorber and a handbrake release device.

[0007] Optionally, the braking seat mounting part includes: A plurality of first brake seat mounting holes and first mounting pads, wherein the first brake seat mounting holes are respectively located at both ends of the longitudinal direction of the support plate, and a first mounting pad is fitted onto any first brake seat mounting hole, and the first mounting pad is provided with a first mounting hole; A plurality of second brake seat mounting holes and second mounting pads are provided. The second brake seat mounting holes are located at the longitudinal ends of the support plate and are located inside the first brake seat mounting holes along the longitudinal direction. A second mounting pad is fitted into any of the first brake seat mounting holes, and the second mounting pad is provided with a second mounting hole.

[0008] Optionally, there are two second brake seat mounting holes on each side, and the two second brake seat mounting holes are arranged vertically along the support plate; The top surface of the second mounting pad is provided with a stop surface to prevent the threaded fasteners in the second mounting hole from rotating.

[0009] Optionally, the second mounting pad is provided with two second mounting holes, which correspond to the second brake seat mounting holes on the same side; The stop surface extends along the length direction of the second mounting pad.

[0010] Optionally, the handbrake release mounting portion is located on the bottom edge of the tray assembly and extends downward; The handbrake release mounting part is a plate-shaped structure.

[0011] Optionally, it also includes: Two traction rod mounting seats and motor hanger integrated seats are located on the longitudinal sides of the crossbeam and are symmetrically arranged along the center of the crossbeam.

[0012] Optionally, the longitudinal ends of the side beam are respectively provided with a primary damper mounting interface and a primary spring mounting interface; The primary spring mounting interface is located longitudinally inside the primary damper mounting interface.

[0013] Optionally, the primary damper mounting interface is a primary damper mounting groove recessed inward at the longitudinal end of the side beam cover plate of the side beam. The side beam upper cover plate of the side beam is provided with third mounting holes at both ends of the primary shock absorber mounting groove, and the third mounting holes penetrate the side beam upper cover plate along the wall thickness direction.

[0014] This application also provides a meter-gauge bogie, comprising: The meter-gauge bogie frame described in any of the above embodiments; A series of shock absorbers are located at both ends of the longitudinal direction of any side beam of the meter-gauge bogie frame; The braking device is connected to the brake seat mounting part of the meter-gauge bogie frame; The drive unit includes a traction motor; The traction device has a single traction rod; The traction motor and the single traction rod are connected to the traction rod mounting seat and motor hanger integrated seat of the meter gauge bogie frame.

[0015] This application also provides a rail vehicle, including the meter-gauge bogie described in the above embodiments.

[0016] Compared with the prior art, the meter-gauge bogie frame, meter-gauge bogie, and rail vehicle provided in this application embodiment have the following technical advantages: The support plate assembly is located at the bottom of the side beam and extends downwards. Brake seat mounting sections are located at both longitudinal ends of the support plate assembly. A transverse vibration damper mounting section and a handbrake release mounting section are located at the center of the support plate assembly, respectively mounting the transverse vibration damper and the handbrake release device. The mounting interfaces for the braking device, vibration damping, and handbrake release function are integrated into the support plate assembly, achieving multiple uses from a single plate. This reduces scattered welded parts on the frame, improving overall integrity. It avoids frequent drilling or welding of small supports on the main body of the side beam, reducing the risk of fatigue cracks. The support plate assembly can be reinforced as a whole, resulting in strong load-bearing capacity. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of a meter-gauge bogie frame provided in an embodiment of this application; Figure 2 This is an axonometric schematic diagram of a meter-gauge bogie frame provided in an embodiment of this application; Figure 3 An axonometric schematic diagram of a meter-gauge bogie frame provided for another embodiment of this application; Figure 4 This is a schematic diagram of a pallet assembly provided in an embodiment of this application.

[0018] The following labels are shown in the attached diagram: Side beam 1, cross beam 2, support plate 3, traction rod mounting base and motor hanger integrated base 4; Brake seat mounting part 31, lateral shock absorber mounting part 32, handbrake release mounting part 33; First brake seat mounting hole 311, first mounting pad 312, second brake seat mounting hole 313, second mounting pad 314, stop surface 3141; Primary shock absorber mounting interface 11, primary spring mounting interface 12. Detailed Implementation

[0019] This invention discloses a meter-gauge bogie frame, a meter-gauge bogie, and a rail vehicle, to solve the problems of existing meter-gauge bogies, such as the need to install braking devices at the ends of the side beams, large space occupation, low space utilization, and difficult maintenance.

[0020] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0021] Please see Figure 1-4 , Figure 1 This is a schematic diagram of the structure of a meter-gauge bogie frame provided in an embodiment of this application; Figure 2 This is an axonometric schematic diagram of a meter-gauge bogie frame provided in an embodiment of this application; Figure 3 An axonometric schematic diagram of a meter-gauge bogie frame provided for another embodiment of this application; Figure 4 This is a schematic diagram of a pallet assembly provided in an embodiment of this application.

[0022] In one specific embodiment, the meter-gauge bogie frame provided in this application includes two oppositely arranged side beams 1 and cross beams 2, with the two ends of the cross beams 2 respectively fixed to the side beams 1; The pallet assembly 3 is located at the bottom of any side beam 1 and extends downward; the two longitudinal ends of the pallet assembly 3 are provided with brake seat mounting parts 31 for mounting brake devices; the longitudinal center of the pallet assembly 3 is provided with a transverse damper mounting part 32 and a hand brake release mounting part 33 for mounting a transverse damper and a hand brake release device, respectively.

[0023] Side beam 1 is the longitudinal main load-bearing beam of the bogie frame, with one on each side arranged in parallel. Cross beam 2 connects the two side beams 1, providing lateral stiffness and structural stability. Side beams 1 and cross beams 2 form an H-shaped or U-shaped frame, which can be configured as needed. The pallet assembly 3 is located at the bottom of either side beam 1 and extends downwards. Utilizing the space under the side beam 1, it avoids interference with components such as wheelsets, axle boxes, and traction motors, providing sufficient installation height and operating space. The pallet assembly can be a welded steel plate structure or an integral cast / forged part to have sufficient strength and stiffness to withstand installation loads.

[0024] Brake seat mounting portions 31 are provided at both longitudinal ends of the pallet assembly 3 for mounting braking devices, such as tread brake devices or brake cylinders. They are located at both longitudinal ends of the pallet assembly 3 to be close to the wheelset position for easy force transmission. The pallet assembly 3 is symmetrically arranged to support double-sided four-end braking. The brake seat mounting portions 31 can be configured as mounting flanges with threaded holes, U-shaped grooves, or pin holes, etc., thereby achieving integrated design, reducing additional supports, and improving the installation rigidity of the braking system.

[0025] In addition, the lateral damper mounting part 32 is located at the longitudinal center of the support plate assembly 3, which suppresses the lateral hunting motion of the bogie and improves the vehicle's running stability and ride comfort. The lateral damper mounting part 32 is located close to the center of gravity of the bogie at the longitudinal center of the support plate assembly 3, resulting in the highest damping efficiency. It is usually connected to the corresponding mounting point on the other side of the frame. The lateral damper mounting part 32 can be configured as a rubber joint mounting seat or a pin hole structure with a bushing. In another embodiment, the manual active release mounting part is used to install the operating mechanism of the handbrake release device (such as a pull rod, pulley, handle support, etc.). When the vehicle is parked, the brake can be released manually, meeting safety requirements (such as manual release of the brake in an emergency). The handbrake release mounting part 33 is arranged in the same area as the lateral damper mounting part 32 to save space and facilitate centralized operation by maintenance personnel. The handbrake release mounting part 33 can be configured as a pin hole, threaded hole, etc.

[0026] Understandably, the braking device is fixed to the support plate assembly 3 via the brake seat mounting part 31. The brake cylinder pushes the brake shoe to act on the wheel. One end of the lateral shock absorber is connected to the lateral shock absorber mounting part 32 on this side, and the other end is connected to the vehicle body or the opposite side frame to suppress lateral vibration. The operator pulls the relief lever and releases the brake cylinder pressure by using the handbrake relief mounting part 33 as the fulcrum. All functions are concentrated in a downwardly extending support plate assembly 3, avoiding the need to open holes or weld multiple independent supports on the side beam 1 body, thus improving the overall strength of the frame.

[0027] In this application, the mounting plates of the meter-gauge bogie form a single mounting plate that integrates the installation interfaces for braking, vibration damping, and handbrake relief, reducing scattered welded parts on the frame and improving overall integrity; avoiding frequent drilling or welding of small brackets on the main body of the side beam 1, reducing the risk of fatigue cracks; the mounting plate can be strengthened as a whole, resulting in strong load-bearing capacity; utilizing the downward space at the bottom of the side beam 1, without occupying the wheelset area, avoiding interference; reducing the number of independent brackets, reducing the risk of welding stress concentration; all mounting points are located on the lower outer side of the frame, making them easy to access and operate; meter-gauge vehicles typically have low axle loads and compact spaces, and this design achieves multi-functional integration within a limited space; suitable for both passenger and freight vehicles.

[0028] In one embodiment, the brake seat mounting portion 31 includes: A plurality of first brake seat mounting holes 311 and first mounting pads 312, wherein the first brake seat mounting holes 311 are respectively located at both ends of the longitudinal direction of the support plate assembly 3, and any first brake seat mounting hole 311 is fitted with a first mounting pad 312, and the first mounting pad 312 is provided with a first mounting hole; A plurality of second brake seat mounting holes 313 and second mounting pads 314 are provided. The second brake seat mounting holes 313 are located at both ends of the longitudinal direction of the support plate assembly 3 and are located inside the first brake seat mounting hole 311 along the longitudinal direction. A second mounting pad 314 is fitted onto any first brake seat mounting hole 311 and the second mounting pad 314 is provided with a second mounting hole.

[0029] The first brake seat mounting hole 311 is located at both ends of the longitudinal direction of the support plate assembly 3, near the end, and is a through hole or a threaded hole; the first mounting pad 312 is fitted onto the first brake seat mounting hole 311, and the first mounting hole is located on the first mounting pad 312, for connecting the mounting bolts of the braking device; the first brake seat mounting part 31 serves as a main mounting point or an auxiliary mounting point for fixing the brake cylinder, brake hanger, etc.; the mounting pad can adjust the mounting angle or compensate for machining errors.

[0030] The second brake seat mounting holes 313 are located at both longitudinal ends of the support plate assembly 3, offset inwards along the longitudinal direction, close to the center of the support plate assembly 3; the second mounting pad 314 is fitted onto the second brake seat mounting holes 313, with the second mounting holes located on the second mounting pad 314, for connecting the braking device; the second brake seat mounting part 31 serves as a redundant mounting point, improving reliability. Two sets of mounting holes are arranged in a double row at each end, supporting redundant connections and preventing single-point failure; they are also staggered longitudinally to avoid stress concentration; the mounting pads can compensate for machining errors, adjust the mounting angle, and disperse stress; improving structural strength; and the symmetrical arrangement at both ends conforms to the stress distribution law of the bogie.

[0031] The above-mentioned device is fixed at multiple points to prevent the braking device from loosening during vibration; the redundant design ensures safe operation even if one mounting point fails; it improves the installation reliability of the braking system; the staggered arrangement of mounting holes avoids local stress superposition; the mounting pads act as stress diffusers, reducing the risk of plate cracking; and the mounting pads can be replaced individually after wear, reducing maintenance costs.

[0032] There are two second brake seat mounting holes 313 on each side, and the two second brake seat mounting holes 313 are arranged vertically along the support plate 3. The top surface of the second mounting pad 314 is provided with a stop surface 3141, which is used to prevent the threaded fasteners in the second mounting hole from rotating.

[0033] Two second brake seat mounting holes 313 are provided on each of the longitudinal sides, arranged vertically, that is, vertically arranged on the track plane; the second brake seat mounting holes 313 are located in the inner area of ​​both ends of the longitudinal direction of the pallet assembly 3; forming a vertical double-point fixation, effectively resisting the bending and torsion of the braking device under vertical loads (such as gravity, impact, vibration); improving the bending stiffness of the installation structure and preventing local deformation of the pallet assembly 3 under bolt pre-tightening or running load.

[0034] The braking device has mass and withstands vertical vibration and impact during vehicle operation; single-point fixing can easily lead to local stress concentration or bolt fatigue in the support plate; vertical double holes can distribute the load to different heights of the support plate, improving structural stability.

[0035] The stop surface 3141 is located on the top surface of the second mounting pad 314, that is, the surface opposite to the surface of the support plate 3. The stop surface 3141 can be set as an L-shaped stop, a flat boss or other structure, which mates with the non-circular surface of the bolt head or nut to restrict the circumferential rotation of the threaded fastener. During assembly, a wrench is used to hold the stop surface 3141 as a reaction point to prevent the bolt from moving when tightening. During operation, the stop surface 3141 prevents the bolt / nut from rotating on its own due to vibration, thus achieving mechanical anti-loosening.

[0036] Understandably, the two vertically arranged mounting holes on each side significantly improve the vertical stability and bending stiffness of the braking device; the stop surface 3141 directly restricts the rotation of the threaded fastener, achieving high reliability in preventing loosening and avoiding vibration-induced loosening; the stop surface 3141 can also serve as a wrench fulcrum to prevent the bolt from moving and simplify the assembly process.

[0037] In one embodiment, the second mounting pad 314 is provided with two second mounting holes, which correspond to the second brake seat mounting holes 313 on the same side; The stop surface 3141 extends along the length of the second mounting pad 314.

[0038] The second mounting pad 314 has two second mounting holes, which are spatially coaxially aligned with the two second brake seat mounting holes 313 on the support plate assembly 3. Bolts pass through the brake device mounting lug, the second mounting hole, the second brake seat mounting hole 313 and the nut in sequence to lock it in place; achieving double-point vertical fixation and ensuring effective load transfer; the mounting pad serves as a transition connector and also has the functions of stress diffusion, angle adjustment and corrosion protection.

[0039] The stop surface 3141 extends along the length of the second mounting pad 314, i.e., vertically along the support plate assembly 3; it can be configured as a strip-shaped boss, an L-shaped long side, or other structures, penetrating the central area of ​​the second mounting pad 314; it provides a unified anti-rotation limiting surface for the two threaded fasteners; during assembly, an open-end wrench or special tool can be used to hold the stop surface 3141 in place to prevent the two bolts from moving simultaneously. By setting the stop surface 3141, the anti-rotation area is larger, making it suitable for various tools; there is no need to set a separate stop surface 3141 for each bolt, as it can be formed in one step through machining or molding. The two second mounting holes precisely match the two second brake seat mounting holes 313, ensuring assembly reliability; the stop surface 3141 extends along the length, providing a unified anti-rotation surface for multiple bolts, improving efficiency; the mounting pad is an independent component and can be replaced individually after wear or damage.

[0040] In another embodiment, the handbrake release mounting part 33 is located on the bottom edge of the tray assembly 3 and extends downward; The handbrake release mounting part 33 is a plate-shaped structure.

[0041] The handbrake release mounting part 33 is located at the bottom edge of the pallet assembly 3, that is, the lowest vertical boundary area of ​​the pallet assembly 3. The handbrake release mounting part 33 extends from the pallet body downwards towards the track plane, forming a suspended operating platform. The handbrake release mounting part 33 is positioned at a height easily accessible to ground maintenance personnel, avoiding the need for bending or crouching during operation, thus conforming to ergonomics. A plate-like structure refers to a flat metal component with a certain area and thickness; it can be formed by cutting, stamping, welding, or integral forging of steel plates; examples include rectangular or trapezoidal reinforcing plates, connecting ears with mounting holes or U-shaped grooves, etc., which can be configured as needed.

[0042] In another embodiment, it further includes: Two traction rod mounting seats and motor hanger integrated seats 4 are located on the longitudinal sides of the crossbeam 2, and are symmetrically arranged along the center of the crossbeam 2.

[0043] Integrate the traction rod mounting bracket with the motor hanger. The traction rod mounting bracket is used to connect the traction rod and transmit traction / braking force; the motor hanger is used to suspend the traction motor and bear its weight and dynamic load; this avoids setting separate traction brackets and motor hangers on the crossbeam 2; it reduces the number of welds, lowers the risk of stress concentration, and improves the overall rigidity and reliability of the frame.

[0044] Integrated seats are set at the front and rear ends of the crossbeam 2 to provide front and rear support points for the traction motor; the two integrated seats are symmetrically arranged about the center of the crossbeam 2 to ensure uniform force on the left and right wheelsets; improve the running stability of the bogie; and facilitate mass production and assembly.

[0045] In one embodiment, the longitudinal beam ends of the side beam 1 are respectively provided with a damper mounting interface 11 and a spring mounting interface 12; The primary spring mounting interface 12 is located longitudinally inside the primary damper mounting interface 11.

[0046] The longitudinal ends of the side beam 1 are the front and rear ends of the side beam 1 in the direction of vehicle travel, and each end corresponds to the primary suspension connection area of ​​a wheelset; this area is the connection hub between the primary suspension system and the frame; the primary shock absorber mounting interface 11 is used to install a vertical hydraulic shock absorber (or rubber shock absorber) to attenuate high-frequency vibrations between the wheelset and the frame; the primary spring mounting interface 12 is used to install a primary coil spring or rubber spring stack to support the weight of the frame and provide vertical elasticity; the above mounting interfaces can be lugs, pin holes, threaded holes, welded supports, etc.; they usually appear in pairs (up and down or left and right) to form a hinged connection; at the same time, the primary spring mounting interface 12 is closer to the middle of the frame than the primary shock absorber mounting interface 11. By placing the spring on the inner side and the shock absorber on the outer side, the space at the end of side beam 1 is fully utilized, avoiding interference. The spring, as the main load-bearing element, is located close to the center, while the shock absorber, as an auxiliary element, is placed on the outside, resulting in more efficient force transmission. This design is particularly suitable for the compact design requirements of meter-gauge bogies (narrow track gauge, limited space). The shock absorber's location on the outer side facilitates easy installation and removal without first disassembling the spring assembly. To protect critical components such as wheelsets and axle box bearings and extend their lifespan, a primary shock absorber and its mounting position are added to the end of side beam 1. This stabilizes the wheel-rail contact relationship, improves operational safety, and provides a better working foundation for the secondary suspension system, jointly ensuring the vehicle's smoothness, safety, and comfort.

[0047] The lateral space of the meter-gauge bogie is limited, and the longitudinal layout optimization can release lateral space; it avoids interference between the primary spring and wheelsets, braking devices, etc.; the primary spring, as the main load-bearing element, is arranged on the inner side near the center of the frame, which is conducive to the uniform distribution of load; the primary shock absorber, as the energy-dissipating element, is arranged on the outer side, which does not affect the main load-bearing path; the shock absorber is located on the outer side so that maintenance personnel can directly access it without disassembling the spring or other components; it greatly shortens maintenance time and reduces operation and maintenance costs; it conforms to the maintenance design principle of easy access and easy replacement.

[0048] In another embodiment, the primary damper mounting interface 11 is a primary damper mounting groove recessed inward at the longitudinal end of the cover plate on the side beam 1 of the side beam 1. The upper cover plate of the side beam 1 has a third mounting hole at each of its transverse ends. The third mounting hole extends through the upper cover plate of the side beam 1 along the wall thickness direction.

[0049] A series of vibration damper mounting slots are recessed inwards, with a rectangular / trapezoidal groove partially cut or formed from the outer edge of the upper cover plate of side beam 1 towards the center of the frame; the groove extends through the upper cover plate of side beam 1 along the wall thickness direction, forming an embedded mounting space to accommodate the upper lug of the vibration damper; this avoids additional welding of external mounting brackets, reduces welds, and improves the overall structural integrity and fatigue resistance. A third mounting hole is provided at each end of the mounting slot laterally, symmetrically arranged to ensure balanced stress; the third mounting hole extends through the wall thickness direction and is a through hole for bolts to pass through and for the lower nut to lock in place. The vibration damper mounting interface is directly formed into the upper cover plate, eliminating the need for additional welded supports, improving overall integrity; reducing additional parts and welds, lowering local weight; avoiding stress concentration at fillet welds, and extending the lifespan of side beam 1.

[0050] This application also provides a meter-gauge bogie, comprising: Meter-gauge bogie frame of any of the above embodiments; A series of shock absorbers are located at both ends of the longitudinal direction of beam 1 on either side of the meter-gauge bogie frame.

[0051] The braking device is connected to the brake seat mounting part 31 of the meter gauge bogie frame; The drive unit includes a traction motor; The traction device has a single traction rod; The traction motor and single traction rod are connected to the traction rod mounting base of the meter-gauge bogie frame and the motor hanger integrated base 4.

[0052] Frame assembly: An H-type frame is adopted, which serves as the basic structure of the bogie and is responsible for assembling all the bogie components into a whole. The frame assembly not only bears and transmits various forces and loads, but also meets the installation interface and space requirements of other devices. The frame is equipped with a support plate assembly 3, and the support plate assembly 3 has a brake seat mounting part 31, which can mechanically prevent loosening. A series of vertical shock absorber mounting interfaces are set at the end of the side beam 1. Due to space constraints and the need to accommodate the installation of traction rods and traction motors, a welded integrated seat is designed to facilitate the installation of traction rods and traction motors.

[0053] Traction System: The bogie features a center pin and a single traction rod structure. The longitudinal force transmission between the car body and the bogie is achieved through the traction system. Both the center pin and the traction rod are equipped with elastic rubber to effectively mitigate impacts during acceleration and deceleration.

[0054] Braking system: Tread brakes are used, with two sets of brake systems installed on each axle to meet vehicle braking requirements. The internal friction generated between the brake pads and the brake discs causes the vehicle to withstand resistance in the forward direction, thus producing a braking effect.

[0055] The meter-gauge bogies of this application can be powered bogies and non-powered bogies, and they adopt similar structural frame devices: except for the motor mount and gearbox mount, the other components are basically the same, and the installed suspension components are interchangeable.

[0056] The power and non-powered bogie frames of this application meet the installation requirements of primary shock absorbers and primary steel springs by setting primary shock absorber mounting and primary steel spring interfaces at the ends of side beam 1, setting brake seat mounting part 31 in the middle of side beam 1 to meet brake cylinder installation requirements, and setting swing arm mounting seat at the slope of side beam 1 to meet axle box swing arm installation requirements. The power bogie frame meets the installation requirements of gearbox, motor, traction rod, and lifting seat interfaces by setting gearbox seat, motor, and traction rod mounting on cross beam 2. Through structural optimization, the consistency of the main structure of the power bogie frame and the non-powered bogie is ensured, and the number of corresponding components is reduced according to functional requirements, thereby reducing material costs. This application is applicable to both power and non-powered bogies, meeting vehicle usage requirements; addressing the space constraints of mounting components under meter gauge conditions; reducing the design of bending parts and reducing manufacturing difficulty while meeting the static strength and fatigue strength requirements of the frame; the main structure consists of self-made steel plates, accounting for more than 95%, shortening the procurement cycle, reducing manufacturing difficulty, and improving production efficiency.

[0057] This application also provides a rail vehicle including the meter-gauge bogie described in any of the above claims.

[0058] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0059] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A meter-gauge bogie frame, characterized in that, include: Two oppositely arranged side beams and a cross beam, with both ends of the cross beam fixed to the side beams respectively; The pallet assembly is located at the bottom of any of the side beams and extends downward; the longitudinal ends of the pallet assembly are provided with brake seat mounting portions for mounting brake devices; the longitudinal center of the pallet assembly is provided with a transverse shock absorber mounting portion and a handbrake release mounting portion for mounting a transverse shock absorber and a handbrake release device, respectively.

2. The meter-gauge bogie frame according to claim 1, characterized in that, The brake seat mounting portion includes: A plurality of first brake seat mounting holes and first mounting pads, wherein the first brake seat mounting holes are respectively located at both ends of the longitudinal direction of the support plate, and a first mounting pad is fitted onto any first brake seat mounting hole, and the first mounting pad is provided with a first mounting hole; A plurality of second brake seat mounting holes and second mounting pads are provided. The second brake seat mounting holes are located at the longitudinal ends of the support plate and are located inside the first brake seat mounting holes along the longitudinal direction. A second mounting pad is fitted into any of the first brake seat mounting holes, and the second mounting pad is provided with a second mounting hole.

3. The meter-gauge bogie frame according to claim 2, characterized in that, There are two second brake seat mounting holes on each side, and the two second brake seat mounting holes are arranged vertically along the support plate. The top surface of the second mounting pad is provided with a stop surface to prevent the threaded fasteners in the second mounting hole from rotating.

4. The meter-gauge bogie frame according to claim 3, characterized in that, The second mounting pad is provided with two second mounting holes, which correspond to the second brake seat mounting holes on the same side; The stop surface extends along the length direction of the second mounting pad.

5. The meter-gauge bogie frame according to claim 1, characterized in that, The handbrake release mounting part is located on the bottom edge of the tray assembly and extends downward; The handbrake release mounting part is a plate-shaped structure.

6. The meter-gauge bogie frame according to claim 1, characterized in that, Also includes: Two traction rod mounting seats and motor hanger integrated seats are located on the longitudinal sides of the crossbeam and are symmetrically arranged along the center of the crossbeam.

7. The meter-gauge bogie frame according to claim 1, characterized in that, The side beam is provided with a primary damper mounting interface and a primary spring mounting interface at its longitudinal ends, respectively. The primary spring mounting interface is located longitudinally inside the primary damper mounting interface.

8. The meter-gauge bogie frame according to claim 7, characterized in that, The primary damper mounting interface is a primary damper mounting groove recessed inward at the longitudinal end of the cover plate on the side beam of the side beam. The side beam upper cover plate of the side beam is provided with third mounting holes at both ends of the primary shock absorber mounting groove, and the third mounting holes penetrate the side beam upper cover plate along the wall thickness direction.

9. A meter-gauge bogie, characterized in that, include: The meter-gauge bogie frame according to any one of claims 1-8; A series of shock absorbers are located at both ends of the longitudinal direction of any side beam of the meter-gauge bogie frame; The braking device is connected to the brake seat mounting part of the meter-gauge bogie frame; The drive unit includes a traction motor; The traction device has a single traction rod; The traction motor and the single traction rod are connected to the traction rod mounting seat and motor hanger integrated seat of the meter gauge bogie frame.

10. A rail vehicle, characterized in that, Includes the meter-gauge bogie as described in claim 9.

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