Railway passenger car bogie

Abstract

The present application discloses a railway passenger car bogie, comprising: a suspension assembly, the suspension assembly comprising a bolster and a frame, the bolster being arranged on the frame; an axle box assembly, the axle box assembly comprising a wheel set, an axle box spring, a bearing seat, a guide column, a positioning sleeve, a bearing cover and an oil pressure shock absorber, the positioning sleeve being arranged on the guide column, the axle box spring being arranged on the guide column and the positioning sleeve, the bearing seat being arranged on the positioning sleeve, the wheel set and the bearing cover being arranged on the bearing seat, the oil pressure shock absorber being arranged on the frame and the bearing cover, and the guide column being arranged on the frame; wherein the axle box spring has upper and lower supporting rings and a plurality of elastic working rings arranged between the two supporting rings, and the supporting ring is provided with a relief groove on the surface opposite to the adjacent elastic working ring. The spring breakage is reduced to prolong the service life of the spring, thereby improving the use reliability of the railway passenger car bogie.

Description

Technical Field

[0001] This invention relates to the field of rail transit vehicle technology, and more particularly to a railway passenger car bogie. Background Technology

[0002] During the operation of railway passenger cars, the springs in the bogies are critical components, used to distribute axle load, mitigate track impacts, and reduce the vehicle's dynamic impact on the track, ensuring comfortable and smooth operation. However, spring failures are frequent in current railway passenger car bogies, with fractures often occurring early in the lifespan of newly manufactured springs. The fractures are all located on the working coils of the springs, concentrated at the contact wear points between the working coils and the support coils, reducing spring lifespan and consequently lowering bogie reliability. The technical problem this invention aims to solve is how to design a technology to improve spring lifespan and enhance bogie reliability. Summary of the Invention

[0003] This invention provides a railway passenger car bogie that reduces spring breakage, extends spring service life, and thus improves the reliability of the railway passenger car bogie.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention provides a railway passenger car bogie, comprising:

[0006] A suspension assembly, the suspension assembly including a bolster and a frame, the bolster being disposed on the frame;

[0007] An axle box assembly includes a wheelset, an axle box spring, a bearing housing, a guide post, a positioning sleeve, a bearing cover, and a hydraulic damper. The positioning sleeve is disposed on the guide post, the axle box spring is disposed on the guide post and the positioning sleeve, the bearing housing is disposed on the positioning sleeve, the wheelset and the bearing cover are disposed on the bearing housing, the hydraulic damper is disposed on the frame and the bearing cover, and the guide post is disposed on the frame.

[0008] The axle box spring has vertically arranged support rings and a plurality of elastic working rings disposed between two of the support rings. The support rings and the adjacent elastic working rings are provided with clearance grooves on their surfaces.

[0009] Furthermore, the clearance groove extends from the free end of the support ring along the extension direction of the support ring.

[0010] Furthermore, the surface of the support ring opposite to the adjacent elastic working ring is provided with an annular plane, the minimum distance between the plane and the adjacent elastic working ring is the same, and the clearance groove is provided on the plane.

[0011] Furthermore, when the axle box spring is at its maximum compressive deformation, the elastic working ring adjacent to the support ring is located in the clearance groove.

[0012] Furthermore, the suspension assembly also includes a limiting block, a shock-absorbing rubber block, a traction rod, and a friction side bearing, wherein the friction side bearing is disposed on the frame, and the limiting block, the traction rod, and the shock-absorbing rubber block are disposed on the bolster;

[0013] The railway passenger car bogie also includes a braking assembly, which includes a rocker arm, a brake lever, a first connecting rod, and a second connecting rod. The brake lever is mounted on the first connecting rod, the rocker arm is mounted on the brake lever, the second connecting rod is mounted on the rocker arm, and the first connecting rod is mounted on the frame.

[0014] Furthermore, the frame is configured as H-shaped, the middle part of the frame is configured as a concave groove, and the rocker arm is disposed in the concave groove of the frame.

[0015] Furthermore, the shock-absorbing rubber blocks are disposed at both ends of the bolster, and the limiting blocks are disposed at both ends near the bolster; the friction side bearings are disposed at both ends of the middle part of the frame, and the friction side bearings support the bolster.

[0016] Furthermore, the first end of the positioning sleeve is disposed at both ends of the bearing seat, the first end of the guide post is disposed inside the second end of the positioning sleeve and the first end of the guide post does not reach the first end of the positioning sleeve, the two ends of the axle box spring are respectively disposed at the second end of the guide post and the first end of the positioning sleeve, and the guide post is respectively disposed at the four corners of the frame.

[0017] Furthermore, the bearing cover is disposed on the side of the bearing housing, the first end of the hydraulic damper is disposed on the frame, and the second end of the hydraulic damper is disposed on the bearing cover.

[0018] Furthermore, the first ends of the first connecting rod are rotatably disposed at the four corners of the middle part of the frame, the two ends of the brake rod are respectively provided with brake blocks, the brake blocks on the brake rod are configured as arcs, one end of the brake blocks on the brake rod is rotatably disposed at the second end of the first connecting rod, and the brake rod is respectively disposed on the first side and the second side of the middle part of the frame, the middle part of the rocker arm is rotatably disposed at the middle part of the brake rod, the first end and the second end of the second connecting rod are respectively rotatably disposed at the first end of the rocker arm, and the second end of the rocker arm on the second side of the middle part of the frame is rotatably disposed at the middle part of the frame.

[0019] The technical solution of the present invention has the following technical effects compared with the prior art: by forming a clearance groove on the support ring of the axle box spring, the clearance groove can reserve space for the adjacent elastic working ring to enter when the axle box spring is compressed. First, it reduces the wear of the elastic working ring in the initial stage of operation. Second, it increases the contact area between the elastic working ring and the support ring, reduces the contact stress, avoids the occurrence of fatigue cracks, reduces the spring breakage and extends the service life of the spring, thereby improving the reliability of railway passenger car bogies. Attached Figure Description

[0020] Figure 1 This is one of the structural schematic diagrams of the railway passenger car bogie of the present invention;

[0021] Figure 2 This is the second schematic diagram of the railway passenger car bogie of the present invention;

[0022] Figure 3 This is the third schematic diagram of the railway passenger car bogie of the present invention;

[0023] Figure 4 for Figure 2 A magnified view of a portion of region A in the middle;

[0024] Figure 5 This is a schematic diagram of the structure of the axle box spring of the railway passenger car bogie of the present invention;

[0025] Figure 6 for Figure 5 A magnified view of a portion of region B in the middle;

[0026] Figure 7 This is a schematic diagram of the frame structure in the railway passenger car bogie of the present invention;

[0027] Figure 8 This is a schematic diagram of the assembly of the frame and braking components in the railway passenger car bogie of the present invention.

[0028] Figure label:

[0029] Suspension assembly 1;

[0030] 11. Rocking bolster; 12. Frame; 13. Limiting block; 14. Shock-absorbing rubber block; 15. Traction rod; 16. Friction side bearing;

[0031] Axle box assembly 2;

[0032] 21. Wheelset 22. Axle box spring 23. Bearing housing 24. Guide post 25. Positioning sleeve 26. Bearing cover 27. Hydraulic damper 28.

[0033] Braking component 3

[0034] Joystick 31, brake lever 32, first link 33, second link 34. Detailed Implementation

[0035] like Figures 1-8 As shown, the present invention provides a railway passenger car bogie, comprising: a suspension assembly 1 and an axle box assembly 2.

[0036] The suspension assembly 1 includes a bolster 11, a frame 12, a limit block 13, a shock-absorbing rubber block 14, a traction rod 15, and a friction side bearing 16. The bolster 11 and the friction side bearing 16 are mounted on the frame 12, and the limit block 13, the traction rod 15, and the shock-absorbing rubber block 14 are mounted on the bolster 11.

[0037] The axle box assembly 2 includes a wheelset 21, an axle box spring 22, a bearing housing 23, a guide post 24, a positioning sleeve 25, a bearing cover 26, and a hydraulic damper 27. The positioning sleeve 25 is mounted on the guide post 24, the axle box spring 22 is mounted on the guide post 24 and the positioning sleeve 25, the bearing housing 23 is mounted on the positioning sleeve 25, the wheelset 21 and the bearing cover 26 are mounted on the bearing housing 23, the hydraulic damper 27 is mounted on the frame 12 and the bearing cover 26, and the guide post 24 is mounted on the frame 12.

[0038] The axle box spring has a support ring 221 arranged vertically and a plurality of elastic working rings 222 disposed between the two support rings 221. The support rings 221 and the adjacent elastic working rings 222 are provided with clearance grooves 2211 on their surfaces.

[0039] Specifically, initially, the contact between the support ring 221 and the elastic working ring 222 is only a narrow line contact, resulting in localized wear. The most severe wear occurs in the early stages of the axle box spring's operation. Once the wear reaches a certain level, the shape of the wear marks remains relatively stable. Therefore, it can be observed that spring breakage often occurs in the early stages of a newly manufactured axle box spring's operation. Based on this characteristic, during the manufacturing of the axle box spring, wear indentations can be pre-formed on the plane of the support ring 221 to create a clearance groove 2211. This reduces wear on the elastic working ring 222 during the initial operation of the axle box spring and increases the contact area between the support ring and the elastic working ring, reducing contact stress and preventing fatigue cracks. The structure of the axle box spring is easy to implement in the manufacturing process. Before the axle box spring is rolled, the support ring 221 needs to be forged and flattened. This can be done using a forging die, or by extruding the bar stock in a hot-melt state to pre-form the indentation to create the clearance groove 2211 before rolling. In terms of mechanical performance, since the support ring 221 plays a supporting role, its own stress is relatively small under working conditions. Therefore, the prefabricated wear concave surface of the support ring 221 forms an avoidance groove 2211, which does not affect the structural strength of the spring.

[0040] Furthermore, the clearance groove 2211 extends from the free end of the support ring 221 along the extending direction of the support ring 221. Specifically, the clearance groove 2211 is formed at the free end of the support ring 221 to avoid the elastic working ring 222 at the end position. Moreover, the clearance groove 2211 is designed to follow the extending direction of the support ring 221 to better ensure good contact with the adjacent elastic working ring 222, thereby reducing friction and stress concentration.

[0041] Furthermore, the surface of the support ring 221 opposite to the adjacent elastic working ring 222 is provided with an annular plane 2212, the minimum distance between the plane 2212 and the adjacent elastic working ring 222 is the same, and the clearance groove 2211 is provided on the plane 2212.

[0042] Specifically, in order to ensure that the support ring 221 provides uniform force to the adjacent elastic working ring 222, a plane 2212 is provided on the support ring 221, and the minimum distance between the center line of the plane 2212 and the adjacent elastic working ring 222 is the same. In this way, after the axle box spring is compressed, the adjacent elastic working ring 222 can receive uniform support from the support ring 221.

[0043] When the axle box spring is at its maximum compressive deformation, the elastic working ring 222 adjacent to the support ring 221 is located in the clearance groove 2211.

[0044] The technical solution of the present invention has the following technical effects compared with the prior art: by forming a clearance groove on the support ring of the axle box spring, the clearance groove can reserve space for the adjacent elastic working ring to enter when the axle box spring is compressed. First, it reduces the wear of the elastic working ring in the initial stage of operation. Second, it increases the contact area between the elastic working ring and the support ring, reduces the contact stress, avoids the occurrence of fatigue cracks, reduces the spring breakage and extends the service life of the spring, thereby improving the reliability of railway passenger car bogies.

[0045] In some embodiments, the railway passenger car bogie further includes a braking assembly 3; the braking assembly 3 includes a rocker arm 31, a brake lever 32, a first connecting rod 33 and a second connecting rod 34, the brake lever 32 is disposed on the first connecting rod 33, the rocker arm 31 is disposed on the brake lever 32, and the second connecting rod 34 is disposed on the rocker arm 31; wherein, the first connecting rod 33 is disposed on the frame 12.

[0046] Specifically, the bolster 11 is mounted on the frame 12, and the vehicle body is mounted on the bolster 11. The bolster 11 and the frame 12 can rotate relative to each other, improving the device's ability to navigate small curves. The friction side bearing 16 is mounted on the frame 12. When the bolster 11 and the frame 12 rotate, it provides the rotational resistance required for vehicle operation. At the same time, the vehicle body transfers its own mass to the friction side bearing 16 through the bolster 11, facilitating the vehicle's passage through curves. The limiting block 13 and the damping rubber block 14 are mounted on the bolster 11, and the vehicle body passes through the limiting block 13 and the damping rubber block 14. Block 14 is mounted on the bolster 11, and limiting blocks 13 block both sides of the vehicle body to facilitate lateral limiting of the vehicle body. At the same time, the shock-absorbing rubber block 14 supports the vehicle body, which helps to improve the stability and comfort of the vehicle. The traction rod 15 is mounted on the bolster 11, connecting the bolster 11 and the vehicle body, which facilitates the transmission of traction and braking forces during vehicle operation. The shock-absorbing rubber block 14 is mounted on the bolster 11, and the vehicle body is mounted on the bolster 11 through the shock-absorbing rubber block 14. The vehicle body compresses the shock-absorbing rubber block 14, and the shock-absorbing rubber block 14 supports the vehicle body, making the vehicle body more comfortable and stable.

[0047] Guide pillar 24 is mounted on frame 12, positioning sleeve 25 is mounted on guide pillar 24, and axle box spring 22 is mounted on both guide pillar 24 and positioning sleeve 25. First, axle box spring 22 is inserted into positioning sleeve 25, then guide pillar 24 passes through axle box spring 22 and is inserted into positioning sleeve 25, allowing axle box spring 22 to support frame 12. Bearing housing 23 is mounted on positioning sleeve 25, and wheelset 21 is mounted on bearing housing 23. When the vehicle is moving, wheelset 21 supports frame 12, facilitating vehicle stability and movement. Bearing cover 26 is mounted on bearing housing 23, and hydraulic damper 27 is mounted on both frame 12 and bearing cover 26, supporting frame 12 and facilitating frame stability.

[0048] The first link 33 is mounted on the frame 12, the brake lever 32 is mounted on the first link 33, the rocker arm 31 is mounted on the brake lever 32, and the second link 34 is mounted on the rocker arm 31. When the rocker arm 31 is rocked, the brake lever 32 rotates through the first link 33 or the second link 34, so that the brake lever 32 can press against the wheelset 21 to brake the vehicle, thereby achieving vehicle braking.

[0049] Furthermore, the frame 12 is configured as H-shaped, with a concave groove in the middle and a rocker arm disposed in the concave groove of the frame 12.

[0050] Specifically, the frame 12 is H-shaped and welded, with wheelsets 21 located at both ends of the frame 12. This facilitates the placement of the wheelsets 21 and also helps the wheelsets 21 support the frame 12. The middle part of the frame 12 is provided with a concave groove, and the bolster 11 is located in the concave groove of the frame 12. The distance between the upper surface of the bolster 11 and the upper surfaces at both ends of the frame 12 is small. The vehicle frame is mounted on the bolster 11, which supports the vehicle body. The reduced distance between the vehicle body and the frame 12 is beneficial to the stability of the vehicle body.

[0051] Furthermore, a through hole is provided in the middle of the frame 12, and the bolster 11 is set in the through hole of the frame 12 through a center pin.

[0052] Specifically, the bolster 11 is set in the through hole of the frame 12 through the center pin, and the car body is set on the bolster 11 to provide traction for the entire vehicle. At the same time, the bolster 11 and the frame 12 can rotate relative to each other, so the frame 12 and the car body can also rotate relative to each other, which facilitates the curved driving of the vehicle when it is in motion.

[0053] Furthermore, shock-absorbing rubber blocks 14 are provided at both ends of the bolster 11, and limiting blocks 13 are provided at both ends near the bolster 11.

[0054] Specifically, the vehicle body is placed on the bolster 11, and the shock-absorbing rubber block 14 supports the vehicle body. The vehicle body squeezes the shock-absorbing rubber block 14, which facilitates the shock absorption of the vehicle during driving, thereby improving the comfort of the vehicle. At the same time, when the vehicle body is placed on the bolster 11, the limiting block 13 provides lateral limitation of the vehicle body, which facilitates the stability of the vehicle.

[0055] Furthermore, friction side bearings 16 are located at both ends of the middle part of the frame 12, and the friction side bearings 16 support the bolster 11.

[0056] Specifically, the friction side bearings 16 are located at both ends of the middle part of the frame 12. The friction side bearings 16 are located exactly in the concave groove of the frame 12. When the bolster 11 is installed on the frame 12, the friction side bearings 16 support the bolster 11, increase the friction between the bolster 11 and the frame 12 support, reduce the vehicle's head-shaking vibration when the vehicle is traveling on a curve, improve the vehicle's stability, and thus facilitate the vehicle to pass through curves.

[0057] Furthermore, the first ends of the traction rod 15 are respectively located at both ends of the bolster 11, and the second ends of the traction rod 15 point to the first end and the second end of the frame 12 respectively.

[0058] Specifically, the first end of the traction rod 15 is respectively set at both ends of the bolster 11, and the second end of the traction rod 15 points to the first end and the second end of the frame 12 respectively. The traction rods 15 at both ends of the frame 12 are respectively connected to the front and rear car bodies of the frame 12, which facilitates mutual traction between the car bodies and thus facilitates the curved driving of the vehicle.

[0059] Furthermore, the first end of the positioning sleeve 25 is located at both ends of the bearing seat 23, the first end of the guide post 24 is located inside the second end of the positioning sleeve 25 and the first end of the guide post 24 does not reach the first end of the positioning sleeve 25, the two ends of the shaft box spring 22 are respectively located at the second end of the guide post 24 and the first end of the positioning sleeve 25, and the guide post 24 is respectively located at the four corners of the frame 12.

[0060] Specifically, the first end of the positioning sleeve 25 is located at both ends of the bearing seat 23, and the first end of the guide post 24 is located inside the second end of the positioning sleeve 25. The guide posts 24 are respectively located at the four corners of the frame 12. The bearing seat 23 and the guide posts 24 support the frame 12, the frame 12 supports the bolster 11, and the bolster 11 supports the vehicle body, enhancing the comfort and stability of the vehicle. The first end of the guide post 24 does not reach the first end of the positioning sleeve 25. The two ends of the axle box spring 22 are respectively located at the second end of the guide post 24 and the first end of the positioning sleeve 25. The axle box spring 22 is supported between the guide post 24 and the positioning sleeve 25. When the vehicle shakes, the guide post 24 and the positioning sleeve 25 can move relative to each other. The axle box spring 22 absorbs the vibration generated by the vehicle shaking, improving the stability of the vehicle.

[0061] Furthermore, the bearing cover 26 is disposed on the side of the bearing housing 23, the first end of the hydraulic damper 27 is disposed on the frame 12, and the second end of the hydraulic damper 27 is disposed on the bearing cover 26.

[0062] The bearing cover 26 is located on the side of the bearing housing 23, and the wheelset 21 is located inside the bearing housing 23 to facilitate the sealing between the wheelset 21 and the bearing housing 23, thereby facilitating the rotation of the wheelset 21. The first end of the hydraulic damper 27 is located on the frame 12, and the second end of the hydraulic damper 27 is located on the bearing cover 26. When the vehicle vibrates while driving, the hydraulic damper 27 supports the frame 12. At the same time, the hydraulic damper 27 absorbs the vibration generated by the vehicle, thereby improving the stability and comfort of the vehicle.

[0063] Furthermore, the first end of the first connecting rod 33 is rotatably mounted on the four corners of the middle part of the frame 12, and brake blocks are respectively mounted on both ends of the brake rod 32. The brake blocks on the brake rod 32 are arc-shaped. One end of the brake blocks on the brake rod 32 is rotatably mounted on the second end of the first connecting rod 33, and the brake rod 32 is respectively mounted on the first side and the second side of the middle part of the frame 12. The middle part of the rocker arm 31 is rotatably mounted on the middle part of the brake rod 32. The first end and the second end of the second connecting rod 34 are rotatably mounted on the first end of the rocker arm 31, and the second end of the rocker arm 31 on the second side of the middle part of the frame 12 is rotatably mounted on the middle part of the frame 12.

[0064] Specifically, the brake blocks on the brake lever 32 are designed in an arc shape, allowing them to better fit against the tread of the wheelset 21, thus facilitating braking of the wheelset 21. The first ends of the first connecting rod 33 are rotatably mounted on the four corners of the middle of the frame 12. Brake blocks are mounted on both ends of the brake lever 32. When braking is required, the brake blocks on the brake lever 32 can press against the tread of the wheelset 21, generating a large frictional force between the tread of the wheelset 21 and the brake blocks on the brake lever 32, thereby achieving vehicle braking. One end of the brake blocks on the brake lever 32 is rotatably mounted on the first connecting rod 33. The second end of the brake lever 32 is respectively located on the first and second sides of the middle of the frame 12. The middle part of the rocker arm 31 is rotatably located in the middle of the brake lever 32. The first end and the second end of the second connecting rod 34 are respectively rotatably located at the first end of the rocker arm 31. The second end of the rocker arm 31 on the second side of the middle of the frame 12 is rotatably located in the middle of the frame 12. When the rocker arm 31 on the first side of the middle of the frame 12 is pulled, the brake block on the brake lever 32 can squeeze different wheelsets 21 on the frame 12 respectively under the rotation of the first connecting rod 33 and the pulling of the second connecting rod 34, thereby realizing the braking of the vehicle.

[0065] When the vehicle vibrates during operation, the damping blocks 14, axle box springs 22, and hydraulic dampers 27 absorb the vibrations generated by the vehicle, thereby improving the vehicle's comfort and stability. When the vehicle is traveling on a curve, the bolster 11 and the frame 12 rotate relative to each other, and the traction rod 15 pulls the vehicle body in front of and behind the frame 12, thus facilitating the vehicle's travel on curves.

[0066] The bolster mounted on the frame facilitates vehicle traction and steering, enabling the vehicle to traverse small curves. Friction bearings on the frame support the bolster and provide friction during curved travel. Limiting blocks on the bolster facilitate lateral restraint of the vehicle body. A first spring on the bolster supports the vehicle body, improving comfort and stability. A traction rod on the bolster facilitates vehicle traction. Wheelsets on bearing seats facilitate vehicle movement. A second spring and hydraulic shock absorbers provide support and damping, further enhancing comfort and stability. A positioning sleeve and guide post facilitate the placement of the second spring. A second connecting rod on the rocker arm and a first connecting rod on the frame facilitate the rotation of the brake lever, thus facilitating vehicle rotation. A rocker arm on the brake lever allows for rotation of the brake lever, enabling braking.

[0067] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A railway passenger car truck characterized by, Comprise: A suspension assembly comprising a bolster and a frame, the bolster is arranged on the frame; An axle box assembly comprising a wheel set, an axle box spring, a bearing seat, a guide column, a positioning sleeve, a bearing cover and an oil hydraulic damper, the positioning sleeve is arranged on the guide column, the axle box spring is arranged on the guide column and the positioning sleeve, the bearing seat is arranged on the positioning sleeve, the wheel set and the bearing cover are arranged on the bearing seat, the oil hydraulic damper is arranged on the frame and the bearing cover, and the guide column is arranged on the frame; Wherein the axle box spring has upper and lower support rings and a plurality of elastic working rings arranged between the two support rings, and the support ring is provided with a relief groove on the surface opposite to the adjacent elastic working ring.

2. The railway passenger car truck of claim 1 wherein, The relief groove is arranged along the extension direction of the support ring from the free end of the support ring.

3. The railway passenger car truck of claim 2 wherein, The surface of the support ring opposite to the adjacent elastic working ring is provided with a ring-shaped plane, the minimum distance of the plane to the adjacent elastic working ring is the same, and the relief groove is arranged on the plane.

4. The railway passenger car truck of claim 1 wherein, When the axle box spring is in maximum extrusion deformation, the elastic working ring adjacent to the support ring is located in the relief groove.

5. Railway passenger car bogie according to any of claims 1 to 4, characterized in that The suspension assembly further comprises a limiting stop block, a damping rubber block, a traction rod and a friction side bearing, the friction side bearing is arranged on the frame, and the limiting stop block, the traction rod and the damping rubber block are arranged on the bolster; The railway passenger car bogie further comprises a brake assembly, the brake assembly comprises a rocker, a brake lever, a first connecting rod and a second connecting rod, the brake lever is arranged on the first connecting rod, the rocker is arranged on the brake lever, the second connecting rod is arranged on the rocker, and the first connecting rod is arranged on the frame.

6. The railway passenger car truck of claim 5 wherein, The frame is arranged in H shape, the middle part of the frame is arranged as a concave groove, and the bolster is arranged in the concave groove of the frame.

7. The railway passenger car truck of claim 5 wherein, The damping rubber block is arranged at both ends of the bolster, and the limiting stop block is arranged close to both ends of the bolster; the friction side bearing is arranged at both ends of the middle part of the frame, and the friction side bearing supports the bolster.

8. The railway passenger car truck of claim 5 wherein, The first end of the positioning sleeve is arranged at both ends of the bearing seat, the first end of the guide column is arranged in the second end of the positioning sleeve, and the first end of the guide column does not reach the first end of the positioning sleeve, both ends of the axle box spring are arranged at the second end of the guide column and the first end of the positioning sleeve respectively, and the guide column is arranged at four corner parts of the frame respectively.

9. The railway passenger car truck of claim 5 wherein, The bearing cover is arranged on the side surface of the bearing seat, the first end of the oil hydraulic damper is arranged on the frame, and the second end of the oil hydraulic damper is arranged on the bearing cover.

10. The railway passenger car truck of claim 5 wherein, The first end of the first connecting rod is rotatably arranged on the four corners of the middle part of the frame, the two ends of the brake lever are respectively provided with brake blocks, the brake blocks on the brake lever are arranged in arc shape, one end of the brake blocks on the brake lever is rotatably arranged on the second end of the first connecting rod, and the brake lever is arranged on the first side and the second side of the middle part of the frame, respectively, the middle part of the rocker is rotatably arranged on the middle part of the brake lever, and the first end and the second end of the second connecting rod are rotatably arranged on the first end of the rocker, respectively, and the second end of the rocker on the second side of the middle part of the frame is rotatably arranged on the middle part of the frame.

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