Railway wagon bogie

Abstract

The application discloses a railway wagon running device and relates to the technical field of running devices, which comprises two symmetrical bottom frame mounting seats, axle box assemblies arranged on the corresponding bottom frame mounting seats, wheel pairs connected between the two axle box assemblies through bearings at two ends, a brake device arranged between the two bottom frame mounting seats and fixed below a vehicle body bottom frame, a traction pull rod arranged between the axle box assemblies and the bottom frame mounting seats in cooperation, two suspension springs, a vertical hydraulic shock absorber and a transverse hydraulic shock absorber. The application has the advantages of compact structure, light weight, reduced self weight of the whole vehicle, improved vehicle operation benefit, stable vehicle operation ensured by the cooperation of the suspension springs, the vertical hydraulic shock absorber and the transverse hydraulic shock absorber.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of walking device technology, more particularly to the field of railway wagon walking device technology. BACKGROUND

[0002] Railway wagons are usually used to transport bulk goods such as coal and steel, and need to have a large carrying capacity. Most railway wagons usually adopt the type of two-axle bogie four-axle car to ensure that the vehicle has a large carrying capacity and good curve passing performance. The existing patents disclose the following technologies:

[0003] Patent No. CN107190600A, patent name "a public and iron dual-purpose welded rail car", discloses the following content: a public and iron dual-purpose welded rail car, including automobile chassis, bearing frame, wheel rail walking device and connecting device, the automobile chassis is connected with the bearing frame through the connecting device, the lifting device is arranged on the bearing frame, the wheel rail walking device is connected with the lifting device, the lifting device is used to lift or lower the wheel rail walking device, so that the wheel rail walking device contacts or separates from the rail of the railway line, realizes the conversion between the vehicle highway mode and the railway mode. The present application has simple and reliable structure, the driving force of the vehicle in railway mode comes from the automobile rear wheel, without increasing the driving system, easy to maintain, the automobile chassis adopts standard domestic structure, the maintenance spare parts are easy to purchase, the wheel rail walking part is designed and manufactured according to the railway wagon standard, has mature use experience, and high reliability.

[0004] Patent No. CN112141134A, patent name "a rail car walking device", discloses the following content: including: power walking part, driven walking part and suspension beam, the suspension beam is connected with the power walking part by rotary support, the suspension beam is connected with the driven walking part by rotary support, the driven walking part can swing relative to the power walking part in the walking direction of the rail car walking device. The present application includes power walking part, driven walking part and suspension beam three parts, the suspension beam is installed on the power walking part and the driven walking part through rotary support, which can make the rail car walking device flexible in steering and good in curve passing performance. The present application adopts two double-axle car frames, one axle installs one wheel. The car frame is provided with two, namely the power walking part car frame and the driven walking part car frame, the two car frames are connected together by the suspension beam, the connection between the suspension beam and the car frame adopts rotary support, when the vehicle passes through the box type rail turnout and the curve, the steering is more flexible, and there is no phenomenon of jamming or single wheel suspension.

[0005] The aforementioned patent applies to bulk cargo transportation. With economic and social development and industrial restructuring, the types of goods transported by rail have gradually diversified. In addition to transporting traditional bulk cargo, rail freight also has the demand for transporting items such as clothing, home appliances, automobiles, and express parcels. Compared with bulk cargo, this type of cargo usually has a lower density. When transporting this type of cargo, the four-axle railway freight cars originally designed for bulk cargo transportation are found to be too heavy, have excessive carrying capacity, and are not economically efficient.

[0006] Therefore, the railway transportation market needs a lightweight two-axle freight car with a load-bearing capacity suitable for low-density freight transport. The two-axle freight car body directly bears the car body load by installing appropriate running gear, while simultaneously constraining the wheelsets. This reduces the need for traditional three major components such as bogie side frames and bolsters, thus lowering the overall weight of the car. Summary of the Invention

[0007] The purpose of this invention is to solve the technical problem that the original four-axle railway freight cars designed for bulk cargo transportation are too heavy, have excessive load-bearing capacity, poor transportation economy, and are not suitable for transporting small and lightweight items. This invention provides a railway freight car running device.

[0008] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0009] This invention provides a railway freight car running device, including two symmetrically arranged underframe mounting seats, axle box assemblies mounted on corresponding underframe mounting seats, and wheelsets connected at both ends between the two axle box assemblies by bearings. A braking device fixed to the underframe of the car body is provided between the two underframe mounting seats. A traction rod, two suspension springs, a vertical hydraulic damper, and a lateral hydraulic damper are provided between the cooperating axle box assemblies and the underframe mounting seats. Each axle box assembly is provided with a lifting lug.

[0010] Specifically, such as Figure 1 As shown, the running gear includes a wheelset, two bearings, two axle box assemblies, two underframe mounting bases, four suspension springs, two vertical hydraulic dampers, two lateral hydraulic dampers, two traction rods, four axle box lugs, and a braking system. The bearings are mounted on both ends of the axle of the wheelset, and the axle box assemblies are mounted on the corresponding bearings via support saddles. Each support saddle and its corresponding bearing are fitted together.

[0011] In one embodiment, each axle box assembly includes an axle box body, two spring bearing platforms disposed at the left and right ends of the axle box body, a bearing saddle disposed in the middle of the axle box body for mounting corresponding bearings, a first traction rod mounting seat disposed at one end of the axle box body, a first vertical hydraulic damper mounting seat disposed at the bottom front side of the axle box body, and a first lateral hydraulic damper mounting seat disposed at the top rear side of the axle box body.

[0012] As Figure 2 shown, specifically, each axle box assembly includes an axle box body, a bearing saddle. The bearing saddle is connected with the axle box body. One spring support platform is arranged on each side of the axle box body.

[0013] In one embodiment, a rubber pad is arranged between the top surface of the bearing saddle and the axle box body.

[0014] Specifically, each axle box assembly includes a rubber pad. The rubber pad is installed on the top surface of the bearing saddle, and the bearing saddle is connected with the axle box body through the rubber pad.

[0015] In one embodiment, the chassis mounting seat includes a base mounting plate and a bracket extending from one end of the base mounting plate, and a second traction rod mounting seat is arranged below the end of the bracket.

[0016] Ball hinges are mounted on both ends of the traction rod, and the traction rod is connected with the second traction rod mounting seat and the first traction rod mounting seat through the corresponding ball hinges.

[0017] Specifically, as Figures 1 to 4 shown, the traction rod is fixedly installed with the second traction rod mounting seat on the bracket and the first traction rod mounting seat on the axle box body through bolts, and the traction rod can transmit the longitudinal force between the axle box assembly and the chassis mounting seat.

[0018] In one embodiment, a second vertical hydraulic damper mounting seat and a second horizontal hydraulic damper mounting seat are arranged on one side of the base mounting plate, a vertical hydraulic damper is movably installed between the first vertical hydraulic damper mounting seat and the second vertical hydraulic damper mounting seat, and a horizontal hydraulic damper is movably installed between the first horizontal hydraulic damper mounting seat and the second horizontal hydraulic damper mounting seat.

[0019] In one embodiment, the chassis mounting seat further includes two cylindrical spring positioning sleeves arranged at both ends of the base mounting plate, and the two cylindrical spring positioning sleeves correspond to the two spring support platforms one by one, and each suspension spring is arranged between the corresponding cylindrical spring positioning sleeve and the spring support platform.

[0020] Specifically, as Figures 1 to 3As shown, a vertical hydraulic damper can be installed between the mounting seat of the axle box assembly and the mounting seat of the chassis mounting seat through the first vertical hydraulic damper mounting seat on the axle box assembly and the second vertical hydraulic damper mounting seat on the chassis mounting seat; a horizontal hydraulic damper can be installed between the mounting seat of the axle box assembly and the mounting seat of the chassis mounting seat through the first horizontal hydraulic damper mounting seat on the axle box assembly and the second horizontal hydraulic damper mounting seat on the chassis mounting seat, and the suspension spring, the vertical hydraulic damper and the horizontal hydraulic damper work together to ensure the smoothness of the vehicle operation.

[0021] In an embodiment, a corresponding suspension spring ring protrusion for positioning and suspending the suspension spring is arranged at the center of each spring bearing surface.

[0022] In an embodiment, the braking device includes two groups of brake link units symmetrically arranged on both sides of the wheel set, and the two groups of brake link units are connected through a brake pull rod hinged connection.

[0023] Each group of brake link units includes a brake beam, two groups of brake shoe assemblies symmetrically arranged on both sides of the brake beam, and a brake lever located in the middle of the corresponding brake beam. One end of the brake lever is hingedly connected to the two groups of brake shoe assemblies through two pull rods, and the other end of the brake lever is hingedly connected to the vehicle body brake pull rod. One end of the brake pull rod is hingedly connected to the middle of the brake lever.

[0024] The two brake shoe assemblies at the same end cooperate with one wheel in the wheel set.

[0025] Specifically, as shown, Figures 5 to 7 The vehicle body brake pull rod acts on the brake lever to generate movement of each component of the brake device under the action of the vehicle body brake pull rod force, so that the brake shoe assemblies are pressed against and tightly pressed against the wheels, and the friction between the two brake shoe assemblies and the wheels realizes the braking of the vehicle.

[0026] In an embodiment, each group of brake shoe assemblies is provided with a brake beam hanger, each brake lever is provided with a brake lever hanger, and the top of each brake lever, each brake lever hanger and each brake beam hanger is fixed on the hanger seat of the vehicle body chassis through a connecting device.

[0027] Specifically, the round hole at one end of each brake lever, each brake lever hanger and each brake beam hanger can install the complete brake device on the hanger seat of the vehicle body chassis through a round pin.

[0028] In an embodiment, the top of each cylindrical spring positioning sleeve is provided with a positioning round pin and a bolt locking hole, and the chassis mounting seat is installed at the bottom of the vehicle body chassis through the positioning round pin and the locking hole.

[0029] Specifically, as shown, Figure 6As shown, the chassis mounting seat is positioned with the whole running device and the vehicle body chassis through the positioning round pin on the top surface, and is further connected and fixed with the vehicle body chassis through the bolt locking hole around the round pin.

[0030] Figure 7 is a structural schematic diagram of the railway wagon after installing two of the present application.

[0031] The beneficial effects of the present application are as follows:

[0032] 1、The present application has compact structure and light weight, can reduce the self weight of the whole vehicle, and improve the vehicle operation benefit; the suspension spring, the vertical hydraulic damper and the horizontal hydraulic damper work cooperatively to ensure the vehicle running stability.

[0033] 2、The present application is simultaneously provided with the steel spring, the rubber pad and the hydraulic damper, and can ensure the vehicle to have good running quality.

[0034] 3、The chassis mounting seat has simple and reliable installation interface, and is convenient for the modular assembly of the present application and the vehicle body.

[0035] 4、Through the first vertical hydraulic damper mounting seat on the axle box assembly and the second vertical hydraulic damper mounting seat on the chassis mounting seat, a vertical hydraulic damper can be installed between the mounting seats of the axle box assembly and the chassis mounting seat; through the first horizontal hydraulic damper mounting seat on the axle box assembly and the second horizontal hydraulic damper mounting seat on the chassis mounting seat, a horizontal hydraulic damper can be installed between the mounting seats of the axle box assembly and the chassis mounting seat, and the suspension spring, the vertical hydraulic damper and the horizontal hydraulic damper work cooperatively to ensure the vehicle running stability. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0037] Figure 1 is a structural schematic diagram of the present application;

[0038] Figure 2 is a structural schematic diagram of the axle box assembly;

[0039] Figure 3 is a structural schematic diagram of the chassis mounting seat;

[0040] Figure 4 is a structural schematic diagram of the traction rod;

[0041] Figure 5 is a structural diagram of a braking device;

[0042] Figure 6 is a mounting diagram of a running device and a vehicle body;

[0043] Figure 7 is a schematic diagram of a whole vehicle;

[0044] Reference signs: 1-wheel set, 2-bearing, 3-axle box assembly, 4-chassis mounting seat, 5-suspension spring, 6-vertical hydraulic shock absorber, 7-horizontal hydraulic shock absorber, 8-traction rod, 9-axle box lifting lug, 10-braking device;

[0045] 31-axle box body, 32-bearing saddle, 33-rubber pad, 34-spring bearing platform surface, 35-first traction rod mounting seat, 36-first vertical hydraulic shock absorber mounting seat, 37-first horizontal hydraulic shock absorber mounting seat;

[0046] 41-bracket, 42-second traction rod mounting seat, 43-second vertical hydraulic shock absorber mounting seat, 44-second horizontal hydraulic shock absorber mounting seat, 45-locking hole, 46-positioning round pin, 47-cylindrical spring positioning sleeve;

[0047] 81-spherical hinge;

[0048] 101-braking beam, 102-braking lever, 103-braking beam lifting rod, 104-braking lever lifting rod, 105-braking rod, 106-shoe assembly. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and technical effects of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0051] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0053] Example 1

[0054] like Figures 1 to 7 As shown, this embodiment provides a railway freight car running device, including two symmetrically arranged underframe mounting seats 4, axle box assemblies 3 arranged on the corresponding underframe mounting seats 4, and wheelsets 1 connected at both ends between the two axle box assemblies 3 by bearings 2. A braking device 10 fixed to the underframe of the car body is arranged between the two underframe mounting seats 4. A traction rod 8, two suspension springs 5, a vertical hydraulic damper 6 and a lateral hydraulic damper 7 are arranged between the axle box assemblies 3 and the underframe mounting seats. Each axle box assembly 3 is provided with a lifting lug.

[0055] Specifically, such as Figure 1 As shown, the running gear includes a wheelset 1, two bearings 2, two axle box assemblies 3, two underframe mounting seats 4, four suspension springs 5, two vertical hydraulic shock absorbers 6, two lateral hydraulic shock absorbers 7, two traction rods 8, four axle box lugs 9, and a braking device 10, among other components. The bearings 2 are mounted on both ends of the axle of the wheelset 1. The axle box assemblies 3 are mounted on the upper parts of the corresponding bearings 2 via support saddles 32, and each support saddle 32 is fitted to the corresponding bearing 2.

[0056] Example 2

[0057] This embodiment provides a railway freight car running device, including two symmetrically arranged underframe mounting seats 4, axle box assemblies 3 mounted on the corresponding underframe mounting seats 4, and wheelsets 1 connected at both ends between the two axle box assemblies 3 by bearings 2. A braking device 10 fixed below the car body underframe is provided between the two underframe mounting seats 4. A traction rod 8, two suspension springs 5, a vertical hydraulic damper 6, and a lateral hydraulic damper 7 are provided between the axle box assemblies 3 and the underframe mounting seats. Each axle box assembly 3 is provided with a lifting lug.

[0058] Each of the axle box assemblies 3 includes an axle box body 31, two spring bearing surfaces 34 disposed at the left and right ends of the axle box body 31, a bearing saddle 32 disposed in the middle of the axle box body 31 for mounting the corresponding bearing 2, a first traction rod mounting seat disposed at one end of the axle box body 31, a first vertical hydraulic damper mounting seat 36 disposed at the bottom front side of the axle box body 31, and a first lateral hydraulic damper mounting seat 37 disposed at the top rear side of the axle box body 31.

[0059] like Figure 2 As shown, specifically, each axle box assembly 3 includes an axle box body 31 and a support saddle 32. The support saddle 32 is connected to the axle box body 31. A spring bearing platform 34 is provided on each side of the axle box body 31.

[0060] A rubber pad 33 is provided between the top surface of the bearing saddle 32 and the axle box 31.

[0061] Specifically, each axle box assembly 3 includes a rubber pad 33. The rubber pad 33 is mounted on the top surface of the bearing saddle 32, and the bearing saddle 32 is connected to the axle box body 31 through the rubber pad 33.

[0062] Example 3

[0063] This embodiment is a further optimization based on Embodiment 1, specifically:

[0064] The base mounting base 4 includes a base mounting plate and a bracket 41 disposed at one end of the base mounting plate and extending out of the base mounting plate. A second traction rod mounting base 42 is disposed below the end of the bracket 41.

[0065] Both ends of the traction rod 8 are equipped with ball joints 81, and both ends of the traction rod 8 are respectively connected to the second traction rod mounting seat 42 and the first traction rod mounting seat 35 through the corresponding ball joints 81.

[0066] Specifically, such as Figures 1 to 4As shown, the axle box assembly 3 is fixedly installed on the second traction rod mounting seat 42 on the bracket 41 and the first traction rod mounting seat 35 on the axle box body 31 by bolts. The longitudinal force between the axle box assembly 3 and the base frame mounting seat 4 can be transmitted through the pull rod 8.

[0067] One side of the base mounting plate is provided with a second vertical hydraulic damper mounting seat 43 and a second lateral hydraulic damper mounting seat 44. The vertical hydraulic damper 6 is movably installed between the first vertical hydraulic damper mounting seat 36 and the second vertical hydraulic damper mounting seat 43; the lateral hydraulic damper 7 is movably installed between the first lateral hydraulic damper mounting seat 37 and the second lateral hydraulic damper mounting seat 44.

[0068] The base mounting base 4 also includes two cylindrical spring positioning sleeves 47 respectively disposed at both ends of the base mounting plate. The two cylindrical spring positioning sleeves 47 correspond one-to-one with the two spring support surfaces 34. Each suspension spring 5 is disposed between the corresponding cylindrical spring positioning sleeve 47 and the spring support surface 34.

[0069] Specifically, such as Figures 1 to 3 As shown, a vertical hydraulic damper 6 can be installed between the axle box assembly 3 and the mounting base of the underframe mounting base 4 via the first vertical hydraulic damper mounting seat 36 on the axle box assembly 3 and the second vertical hydraulic damper mounting seat 43 on the underframe mounting base 4; a lateral hydraulic damper 7 can be installed between the axle box assembly 3 and the mounting base of the underframe mounting base 4 via the first lateral hydraulic damper mounting seat 37 on the axle box assembly 3 and the second lateral hydraulic damper mounting seat 44 on the underframe mounting base 4. The suspension spring 5, the vertical hydraulic damper 6, and the lateral hydraulic damper 7 work together to ensure the smooth operation of the vehicle.

[0070] Each of the spring support surfaces 34 has a circular protrusion at its center for positioning and suspending the spring corresponding to the suspension spring 5.

[0071] Example 4

[0072] This embodiment is a further optimization based on embodiment 3, specifically:

[0073] The braking device 10 includes two sets of brake linkage units symmetrically arranged on both sides of the wheelset 1, and the two sets of brake linkage units are hinged together by a brake lever 105.

[0074] Each group of the brake link unit comprises a brake beam 101, two groups of brake shoe assemblies 106 symmetrically arranged on both sides of the brake beam 101, and a brake lever 102 located at the middle of the brake beam 101, one end of the brake lever 102 is hinged with the two groups of brake shoe assemblies 106 through two draw bars respectively, and the other end of the brake lever 102 is hinged with a vehicle body brake draw bar, one end of the brake draw bar 105 is hinged in the middle of the brake lever 102.

[0075] The two brake shoe assemblies 106 at the same end cooperate with one wheel in the wheel set 1.

[0076] Specifically, as shown in Figures 5 to 7 The vehicle body brake draw bar acts a brake force on the brake lever 102, and each component of the brake device 10 moves under the action of the brake force of the vehicle body brake draw bar, so that the brake shoe assemblies 106 abut and press the wheels, and the vehicle braking is realized through the friction between the two brake shoe assemblies 106 and the wheels.

[0077] Embodiment 5

[0078] This embodiment is further optimized on the basis of embodiment 4, specifically:

[0079] Each group of the brake shoe assemblies 106 is provided with a brake beam hanger 103, each brake lever 102 is provided with a brake lever hanger 104, and the top of each brake lever 102, each brake lever hanger 104 and each brake beam hanger 103 is fixed on the hanger seat of the vehicle body chassis through a connecting device.

[0080] Specifically, the round hole at one end of each brake lever 102, each brake lever hanger 104 and each brake beam hanger 103 can install the whole brake device 10 on the hanger seat of the vehicle body chassis through a round pin.

[0081] The top of each cylindrical spring positioning sleeve 47 is provided with a positioning round pin 46 and a bolt locking hole 45, and the chassis mounting seat 4 is mounted on the bottom of the vehicle body chassis through the positioning round pin 46 and the locking hole 45.

[0082] Specifically, as shown in Figure 6 The chassis mounting seat 4 positions the whole running device and the vehicle body chassis through the positioning round pin 46 on the top surface, and further connects and fixes the vehicle body chassis through the bolt locking hole 45 around the round pin.

[0083] Figure 7 It is a structural schematic view of the railway wagon after installing two embodiments of the present application.

Claims

1. A railway freight car traveling device, characterized in that, The vehicle includes two symmetrically arranged underframe mounting seats (4), axle box assemblies (3) mounted on the corresponding underframe mounting seats (4), and wheelsets (1) connected at both ends to the two axle box assemblies (3) via bearings (2). A braking device (10) fixed to the underside of the vehicle body underframe is provided between the two underframe mounting seats (4). A traction rod (8), two suspension springs (5), a vertical hydraulic damper (6), and a lateral hydraulic damper (7) are provided between the axle box assemblies (3) and the underframe mounting seats. Each of the axle box assemblies (3) includes an axle box body (31), two spring bearing platforms (34) disposed at the left and right ends of the axle box body (31), a bearing saddle (32) disposed in the middle of the axle box body (31) for mounting the corresponding bearing (2), a first traction rod mounting seat disposed at one end of the axle box body (31), a first vertical hydraulic damper mounting seat (36) disposed at the bottom front side of the axle box body (31), and a first transverse hydraulic damper mounting seat (37) disposed at the top rear side of the axle box body (31); A rubber pad (33) is provided between the top surface of the bearing saddle (32) and the axle box body (31); The base mounting base (4) includes a base mounting plate and a bracket (41) disposed at one end of the base mounting plate and extending out of the base mounting plate. A second traction rod mounting base (42) is disposed below the end of the bracket (41). Both ends of the traction rod (8) are equipped with ball joints (81), and both ends of the traction rod (8) are respectively connected to the second traction rod mounting seat (42) and the first traction rod mounting seat (35) through the corresponding ball joints (81); The base mounting plate has a second vertical hydraulic damper mounting seat (43) and a second lateral hydraulic damper mounting seat (44) on one side. The vertical hydraulic damper (6) is movably installed between the first vertical hydraulic damper mounting seat (36) and the second vertical hydraulic damper mounting seat (43). The lateral hydraulic damper (7) is movably installed between the first lateral hydraulic damper mounting seat (37) and the second lateral hydraulic damper mounting seat (44).

2. The railway freight car running device according to claim 1, characterized in that, The base mounting base (4) also includes two cylindrical spring positioning sleeves (47) respectively disposed at both ends of the base mounting plate. The two cylindrical spring positioning sleeves (47) correspond one-to-one with the two spring support surfaces (34). Each suspension spring (5) is disposed between the corresponding cylindrical spring positioning sleeve (47) and the spring support surface (34).

3. A railway freight car running device according to claim 2, characterized in that, Each of the spring support surfaces (34) has a circular protrusion at its center for positioning and suspending the spring corresponding to the suspension spring (5).

4. A railway freight car running device according to claim 3, characterized in that, The braking device (10) includes two sets of brake linkage units symmetrically arranged on both sides of the wheelset (1), and the two sets of brake linkage units are hinged together by brake levers (105); Each group of brake linkage units includes a brake beam (101), two sets of brake shoe assemblies (106) symmetrically arranged on both sides of the brake beam (101), and a brake lever (102). The brake lever (102) is located in the middle of the corresponding brake beam (101). One end of the brake lever (102) is hinged to the two sets of brake shoe assemblies (106) respectively through two tie rods. The other end of the brake lever (102) is hinged to the vehicle body brake lever. One end of the brake lever (105) is hinged to the middle of the brake lever (102). The two brake shoe assemblies (106) at the same end engage with one of the wheels in the wheelset (1).

5. A railway freight car running device according to claim 4, characterized in that, Each brake shoe assembly (106) is provided with a brake beam hanger (103), and each brake lever (102) is provided with a brake lever hanger (104). The tops of each brake lever (102), each brake lever hanger (104) and each brake beam hanger (103) are fixed to the hanger of the vehicle chassis by a connecting device.

6. A railway freight car running device according to claim 2, characterized in that, Each of the cylindrical spring positioning sleeves (47) is provided with a positioning pin (46) and a bolt locking hole (45) at its top. The base frame mounting seat (4) is installed at the bottom of the vehicle body base frame through the positioning pin (46) and the locking hole (45).

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