Railway wagon walking device

Abstract

The invention discloses a railway wagon walking device, which relates to the technical field of walking devices, and comprises two symmetrically arranged chassis mounting seats, axle box assemblies arranged on the corresponding chassis mounting seats, and a wheel pair of which the two ends are connected between the two axle box assemblies through bearings, a brake device fixed below a vehicle body chassis is arranged between the two chassis mounting seats, and a traction rod, two suspension springs, a vertical hydraulic shock absorber and a transverse hydraulic shock absorber are arranged between the axle box assembly and the chassis mounting seats which are matched with each other. The structure is compact, the weight is light, the dead weight of the whole vehicle can be reduced, and vehicle operation benefits are improved; the suspension springs, the vertical hydraulic shock absorbers and the transverse hydraulic shock absorbers work cooperatively so that the running stability of the vehicle can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of running devices, and more specifically to the technical field of a railway freight car running device. Background Art

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

[0003] The patent with publication number CN107190600A and patent name "A road-rail dual-purpose rail welding vehicle" discloses the following content: A road-rail dual-purpose rail welding vehicle, including a vehicle chassis, a load frame, a wheel-rail running device and a connecting device, the vehicle chassis is movably connected to the load frame through the connecting device, a lifting device is arranged on the load frame, the wheel-rail running device is connected to the lifting device, and the lifting device is used to lift or lower the wheel-rail running device so that the wheel-rail running device contacts or disengages from the rails of the railway line, thereby realizing the conversion between the vehicle road mode and the railway mode. The structure of the present invention is simple and reliable. In the vehicle railway operation mode, the driving force comes from the rear wheels of the vehicle, and there is no need to add a drive system, which is easy to maintain. The vehicle chassis adopts a standard domestic structure, and spare parts are easy to purchase. All parts of the wheel-rail running device are designed and manufactured according to the standards of railway freight cars, with mature application experience and high reliability.

[0004] The patent with publication number CN112141134A and patent name "A rail vehicle running device" discloses the following contents: including: a power running part, a driven running part and a suspension beam, the suspension beam and the power running part are connected by a slewing bearing, the suspension beam and the driven running part are connected by a slewing bearing, and the driven running part can swing relative to the power running part in the running direction of the rail vehicle running device. The present invention includes three parts: a power running part, a driven running part and a suspension beam. The suspension beam is installed on the power running part and the driven running part through a slewing bearing. This structure can make the rail vehicle running device flexible in steering and good in cornering passability. The present invention adopts a two-axle frame, and one axle is installed with one wheel. There are two frames, namely the power running part frame and the driven running part frame. The two frames are connected together by a suspension beam, and a slewing bearing is used at the connection between the suspension beam and the frame. When the vehicle passes through box-type track switches and curves, its steering is more flexible and there will be no jamming or single wheel hanging.

[0005] The above patent is applicable to bulk cargo transportation. With the economic and social development and industrial structure adjustment, the types of railway cargo transportation have gradually diversified. In addition to the transportation of traditional bulk cargo, railway freight has also seen the transportation demand for clothing, home appliances, automobiles, express parcels, etc. Compared with bulk cargo, this type of cargo is usually less dense. When transporting this type of cargo, the original four-axle railway freight car designed for bulk cargo transportation appears to be too heavy, with excess carrying capacity and poor transportation economy.

[0006] Therefore, the railway transportation market needs a two-axle truck with light weight and carrying capacity that matches the low-density cargo transportation. The two-axle truck body directly bears the body load by installing the corresponding running device, while realizing the constraint of the wheelset, reducing the traditional three-piece bogie side frame, bolster and other components, and reducing the weight of the whole vehicle. Summary of the invention

[0007] The purpose of the present invention is to provide a railway freight car running device in order to solve the technical problem that the original four-axle railway freight cars designed for bulk cargo transportation have too much weight, excessive carrying capacity, poor transportation economy, and are not suitable for the transportation of small and light objects.

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] The present invention provides a railway freight car running device, comprising two symmetrically arranged chassis mounting seats, axle box assemblies arranged on the corresponding chassis mounting seats, and a wheel pair whose two ends are connected between the two axle box assemblies through bearings, a braking device fixed below the chassis of the vehicle body is arranged between the two chassis mounting seats, a traction rod, two suspension springs, a vertical hydraulic shock absorber and a transverse hydraulic shock absorber are arranged between the axle box assembly and the chassis mounting seats that cooperate with each other, and each axle box assembly is provided with a lifting lug.

[0010] Specifically, if Figure 1 As shown, the running gear includes a wheelset, two bearings, two axle box assemblies, two chassis mounting seats, four suspension springs, two vertical hydraulic shock absorbers, two transverse hydraulic shock absorbers, two traction rods, four axle box lifting ears, a set of brake devices and other components. The bearings are installed at both ends of the axle of the wheelset, and the axle box assembly is installed on the upper part of the corresponding bearing through the bearing saddle, and each bearing saddle forms a matching assembly with the corresponding bearing.

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

[0012] like Figure 2 As shown, specifically, each axle box assembly includes an axle box body and a bearing saddle. The bearing saddle is connected to the axle box body. A spring bearing surface is respectively arranged on both sides of the axle box body.

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

[0014] Specifically, each axle box assembly includes a rubber pad, which is mounted on the top surface of the load saddle and connects the load saddle to the axle box body through the rubber pad.

[0015] In one embodiment, the chassis mounting seat includes a base mounting plate and a bracket disposed at one end of the base mounting plate and extending out of the base mounting plate, and a second traction rod mounting seat is disposed below the end of the bracket;

[0016] Both ends of the traction rod are equipped with ball joints, and the two ends of the traction rod are respectively connected to the second traction rod mounting seat and the first traction rod mounting seat through corresponding ball joints.

[0017] Specifically, if Figures 1 to 4 As shown, the second traction rod mounting seat on the bracket and the first traction rod mounting seat on the axle box body are fixedly installed by bolts respectively, and the longitudinal force between the axle box assembly and the chassis mounting seat can be transmitted through the traction rod.

[0018] In one embodiment, a second vertical hydraulic shock absorber mounting seat and a second lateral hydraulic shock absorber mounting seat are provided on one side of the base mounting plate, and the vertical hydraulic shock absorber is movably mounted between the first vertical hydraulic shock absorber mounting seat and the second vertical hydraulic shock absorber mounting seat; the lateral hydraulic shock absorber is movably mounted between the first lateral hydraulic shock absorber mounting seat and the second lateral hydraulic shock absorber mounting seat.

[0019] In one embodiment, the base frame mounting seat also includes two cylindrical spring positioning sleeves respectively arranged at both ends of the base mounting plate, the two cylindrical spring positioning sleeves correspond one-to-one to the two spring supporting surfaces, and each suspension spring is respectively arranged between the corresponding cylindrical spring positioning sleeve and the spring supporting surface.

[0020] Specifically, if Figures 1 to 3As shown, a vertical hydraulic shock absorber can be installed between the mounting seats of the axle box assembly and the chassis mounting seat through the first vertical hydraulic shock absorber mounting seat on the axle box assembly and the second vertical hydraulic shock absorber mounting seat on the chassis mounting seat; a transverse hydraulic shock absorber can be installed between the mounting seats of the axle box assembly and the chassis mounting seat through the first transverse hydraulic shock absorber mounting seat on the axle box assembly and the second transverse hydraulic shock absorber mounting seat on the chassis mounting seat. The suspension spring, the vertical hydraulic shock absorber and the transverse hydraulic shock absorber work together to ensure the smooth operation of the vehicle.

[0021] In one embodiment, a circular suspension spring protrusion corresponding to the suspension spring for positioning and suspending the spring is disposed at the center of each spring support surface.

[0022] In one embodiment, the brake device comprises two groups of brake link units symmetrically arranged on both sides of the wheelset, and the two groups of brake link units are hingedly connected via a brake pull rod;

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

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

[0025] Specifically, if Figures 5 to 7 As shown, the vehicle body brake rod applies the braking force to the brake lever, and the components of the brake device move under the pulling force of the vehicle body brake rod, so that the brake shoe assembly is close to and presses the wheel, and the vehicle braking is achieved through the friction between the two brake shoe assemblies and the wheel.

[0026] In one embodiment, each brake shoe assembly is provided with a brake beam hanger, each brake lever is provided with a brake lever hanger, and each brake lever, each brake lever hanger and each brake beam hanger top are fixed to a hanger seat of the vehicle body frame through a connecting device.

[0027] Specifically, the round holes at one end of each brake lever, each brake lever suspension rod and each brake beam suspension rod are connected through round pins, so that the entire set of brake devices can be installed on the vehicle body underframe suspension seat.

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

[0029] Specifically, if Figure 6As shown, the chassis mounting seat has a positioning round pin on the top surface to position the entire running device and the vehicle body chassis, and is further connected and fixed to the vehicle body chassis through bolt locking holes around the round pin.

[0030] Figure 7 It is a schematic diagram of the structure of a railway freight car after two of the present inventions are installed.

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

[0032] 1. The present invention has a compact structure and light weight, which can reduce the deadweight of the whole vehicle and improve the vehicle operation efficiency; the suspension spring, vertical hydraulic shock absorber and transverse hydraulic shock absorber work together to ensure the stability of vehicle operation.

[0033] 2. This solution is equipped with two elastic suspension elements, steel springs and rubber pads, and hydraulic shock absorbers, which can ensure that the vehicle has good running quality.

[0034] 3. The mounting interface of the chassis mounting base is simple and reliable, which facilitates modular assembly of this solution and the vehicle body.

[0035] 4. Through the first vertical hydraulic shock absorber mounting seat on the axle box assembly and the second vertical hydraulic shock absorber mounting seat on the chassis mounting seat, a vertical hydraulic shock absorber can be installed between the mounting seats of the axle box assembly and the chassis mounting seat; through the first lateral hydraulic shock absorber mounting seat on the axle box assembly and the second lateral hydraulic shock absorber mounting seat on the chassis mounting seat, a lateral hydraulic shock absorber can be installed between the mounting seats of the axle box assembly and the chassis mounting seat. The suspension spring, the vertical hydraulic shock absorber, and the lateral hydraulic shock absorber work together to ensure the smooth operation of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a schematic diagram of the structure of the present invention;

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

[0039] Figure 3 is a schematic diagram of the structure of the chassis mounting base;

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

[0041] Figure 5 is a schematic diagram of the structure of the braking device;

[0042] Figure 6 It is a schematic diagram of the installation of the running gear and the vehicle body;

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

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

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

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

[0047] 81-Ball hinge;

[0048] 101-brake beam, 102-brake lever, 103-brake beam suspension rod, 104-brake lever suspension rod, 105-brake pull rod, 106-brake shoe assembly. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and technical effects of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on 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 chassis mounting seats 4, axle box assemblies 3 arranged on the corresponding chassis mounting seats 4, and a wheelset 1 connected between the two axle box assemblies 3 at both ends through bearings 2, a braking device 10 fixed under the vehicle body chassis is arranged between the two chassis mounting seats 4, a traction rod 8, two suspension springs 5, a vertical hydraulic shock absorber 6 and a transverse hydraulic shock absorber 7 are arranged between the axle box assemblies 3 and the chassis mounting seats that cooperate with each other, and each axle box assembly 3 is provided with a lifting lug.

[0055] Specifically, if Figure 1 As shown, the running device includes a wheelset 1, two bearings 2, two axle box assemblies 3, two chassis mounting seats 4, four suspension springs 5, two vertical hydraulic shock absorbers 6, two transverse hydraulic shock absorbers 7, two traction rods 8, four axle box lifting ears 9, a set of braking devices 10 and other components. The bearings 2 are installed at both ends of the axle of the wheelset 1, and the axle box assembly 3 is installed on the upper part of the corresponding bearing 2 through the bearing saddle 32, and each bearing saddle 32 forms a matching assembly with the corresponding bearing 2.

[0056] Example 2

[0057] The present embodiment provides a railway freight car running device, comprising two symmetrically arranged chassis mounting seats 4, axle box assemblies 3 arranged on the corresponding chassis mounting seats 4, and a wheelset 1 whose two ends are connected between the two axle box assemblies 3 through bearings 2, a braking device 10 fixed below the vehicle body chassis is arranged between the two chassis mounting seats 4, a traction rod 8, two suspension springs 5, a vertical hydraulic shock absorber 6 and a lateral hydraulic shock absorber 7 are arranged between the axle box assemblies 3 and the chassis mounting seats that cooperate with each other, and 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 arranged at the left and right ends of the axle box body 31, a load-bearing saddle 32 arranged in the middle of the axle box body 31 for installing the corresponding bearing 2, a first traction rod mounting seat arranged at one end of the axle box body 31, a first vertical hydraulic shock absorber mounting seat 36 arranged at the bottom of the front side of the axle box body 31, and a first lateral hydraulic shock absorber mounting seat 37 arranged at the top of the 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 bearing saddle 32. The bearing saddle 32 is connected to the axle box body 31. A spring bearing surface 34 is provided on both sides 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 installed 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 further optimized on the basis of embodiment 1, specifically:

[0064] The chassis mounting seat 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, and a second traction rod mounting seat 42 is disposed below the end of the bracket 41;

[0065] Both ends of the traction rod 8 are installed with ball joints 81 , and the two ends of the traction rod 8 are 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, if Figures 1 to 4As shown, 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 are fixedly installed by bolts respectively, and the longitudinal force between the axle box assembly 3 and the base frame mounting seat 4 can be transmitted through the guide rod 8.

[0067] A second vertical hydraulic shock absorber mounting seat 43 and a second lateral hydraulic shock absorber mounting seat 44 are provided on one side of the base mounting plate; the vertical hydraulic shock absorber 6 is movably mounted between the first vertical hydraulic shock absorber mounting seat 36 and the second vertical hydraulic shock absorber mounting seat 43; the lateral hydraulic shock absorber 7 is movably mounted between the first lateral hydraulic shock absorber mounting seat 37 and the second lateral hydraulic shock absorber mounting seat 44.

[0068] The chassis mounting seat 4 also includes two cylindrical spring positioning sleeves 47 respectively arranged at both ends of the base mounting plate, the two cylindrical spring positioning sleeves 47 correspond one-to-one to the two spring support surfaces 34, and each of the suspension springs 5 ​​is respectively arranged between the corresponding cylindrical spring positioning sleeves 47 and the spring support surface 34.

[0069] Specifically, if Figures 1 to 3 As shown, a vertical hydraulic shock absorber 6 can be installed between the mounting seats of the axle box assembly 3 and the chassis mounting seat 4 through the first vertical hydraulic shock absorber mounting seat 36 on the axle box assembly 3 and the second vertical hydraulic shock absorber mounting seat 43 on the chassis mounting seat 4; a transverse hydraulic shock absorber 7 can be installed between the mounting seats of the axle box assembly 3 and the chassis mounting seat 4 through the first transverse hydraulic shock absorber mounting seat 37 on the axle box assembly 3 and the second transverse hydraulic shock absorber mounting seat 44 on the chassis mounting seat 4. The suspension spring 5, the vertical hydraulic shock absorber 6, and the transverse hydraulic shock absorber 7 work together to ensure the smooth operation of the vehicle.

[0070] A circular protrusion corresponding to the suspension spring 5 is provided at the center of each spring support surface 34 for positioning and suspending the spring.

[0071] Example 4

[0072] This embodiment is further optimized on the basis of embodiment 3, specifically:

[0073] The brake device 10 comprises two groups of brake link units symmetrically arranged on both sides of the wheelset 1, and the two groups of brake link units are hingedly connected via a brake pull rod 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, wherein the brake lever 102 is located in the middle of the corresponding brake beam 101, one end of the brake lever 102 is respectively hinged to the two groups of brake shoe assemblies 106 through two pull rods, the other end of the brake lever 102 is hinged to the vehicle body brake pull rod, and one end of the brake pull rod 105 is hinged to the middle of the brake lever 102;

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

[0076] Specifically, if Figures 5 to 7 As shown, the vehicle body brake rod applies the braking force to the brake lever 102, and the components of the brake device 10 move under the action of the pulling force of the vehicle body brake rod, so that the brake shoe assembly 106 is close to and presses the wheel, and the vehicle braking is achieved through the friction between the two brake shoe assemblies 106 and the wheel.

[0077] Example 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, and each brake lever 102 is provided with a brake lever hanger 104. The top of each brake lever 102, each brake lever hanger 104 and each brake beam hanger 103 is fixed to the hanger of the vehicle body frame through a connecting device.

[0080] Specifically, the round holes at one end of each of the brake levers 102 , each of the brake lever suspension rods 104 and each of the brake beam suspension rods 103 can be connected through round pins, so that the entire brake device 10 can be installed on the vehicle body underframe suspension seat.

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

[0082] Specifically, if Figure 6 As shown, the chassis mounting seat 4 has a positioning round pin 46 on the top surface to position the entire running device and the vehicle body chassis, and is further connected and fixed to the vehicle body chassis through bolt locking holes 45 around the round pin.

[0083] Figure 7 It is a schematic diagram of the structure of a railway freight car after two of the present inventions are installed.

Claims

1. A railway freight car running device, characterized in that: The invention comprises two symmetrically arranged chassis mounting seats (4), an axle box assembly (3) arranged on the corresponding chassis mounting seats (4), and a wheelset (1) whose two ends are connected between the two axle box assemblies (3) through bearings (2); a brake device (10) fixed below the chassis of the vehicle body is arranged between the two chassis mounting seats (4); and a traction rod (8), two suspension springs (5), a vertical hydraulic shock absorber (6) and a lateral hydraulic shock absorber (7) are arranged between the axle box assembly (3) and the chassis mounting seats that cooperate with each other.

2. A railway freight car running device according to claim 1, characterized in that: Each of the axle box assemblies (3) comprises an axle box body (31), two spring bearing surfaces (34) arranged at the left and right ends of the axle box body (31), a load-bearing saddle (32) arranged in the middle of the axle box body (31) for mounting the corresponding bearing (2), a first traction rod mounting seat arranged at one end of the axle box body (31), a first vertical hydraulic shock absorber mounting seat (36) arranged at the bottom of the front side of the axle box body (31), and a first transverse hydraulic shock absorber mounting seat (37) arranged at the top of the rear side of the axle box body (31).

3. A railway freight car running device according to claim 2, characterized in that: A rubber pad (33) is provided between the top surface of the bearing saddle (32) and the axle box body (31).

4. A railway freight car running device according to claim 2, characterized in that: The chassis mounting seat (4) comprises a base mounting plate and a bracket (41) arranged at one end of the base mounting plate and extending out of the base mounting plate, and a second traction rod mounting seat (42) is arranged below the end of the bracket (41); Both ends of the traction rod (8) are installed with ball joints (81), and the two 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).

5. A railway freight car running device according to claim 4, characterized in that: A second vertical hydraulic shock absorber mounting seat (43) and a second transverse hydraulic shock absorber mounting seat (44) are provided on one side of the base mounting plate; the vertical hydraulic shock absorber (6) is movably mounted between the first vertical hydraulic shock absorber mounting seat (36) and the second vertical hydraulic shock absorber mounting seat (43); and the transverse hydraulic shock absorber (7) is movably mounted between the first transverse hydraulic shock absorber mounting seat (37) and the second transverse hydraulic shock absorber mounting seat (44).

6. A railway freight car running device according to claim 5, characterized in that: The chassis mounting seat (4) also includes two cylindrical spring positioning sleeves (47) respectively arranged at both ends of the base mounting plate, the two cylindrical spring positioning sleeves (47) correspond to the two spring support surfaces (34) one by one, and each of the suspension springs (5) is respectively arranged between the corresponding cylindrical spring positioning sleeves (47) and the spring support surface (34).

7. A railway freight car running device according to claim 6, characterized in that: A circular protrusion corresponding to the suspension spring (5) is provided at the center of each spring support surface (34) for positioning and suspending the spring.

8. A railway freight car running device according to claim 6, characterized in that: The brake device (10) comprises two groups of brake link units symmetrically arranged on both sides of the wheelset (1), and the two groups of brake link units are hingedly connected via a brake pull rod (105); Each group of the brake link units 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); 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 groups of brake shoe assemblies (106) through two pull rods, the other end of the brake lever (102) is hinged to the vehicle body brake pull rod, and one end of the brake pull rod (105) is hinged to the middle of the brake lever (102); The two brake shoe assemblies (106) at the same end cooperate with a wheel in the wheelset (1).

9. A railway freight car running device according to claim 8, characterized in that: Each group of the brake shoe assemblies (106) is provided with a brake beam suspension rod (103), each brake lever (102) is provided with a brake lever suspension rod (104), and the top of each brake lever (102), each brake lever suspension rod (104) and each brake beam suspension rod (103) is fixed to a suspension seat of the vehicle body frame through a connecting device.

10. The railway freight car running device according to claim 6, characterized in that: A positioning round pin (46) and a bolt locking hole (45) are arranged at the top of each cylindrical spring positioning sleeve (47), and the chassis mounting seat (4) is mounted on the bottom of the vehicle chassis via the positioning round pin (46) and the locking hole (45).

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