A metro vehicle bogie

Abstract

This utility model belongs to the field of rail vehicle technology. The disclosed metro vehicle bogie includes a frame with axles at both ends. Wheels are mounted at both ends of each axle, and a gearbox with a drive motor connected to one end is mounted on each axle. The frame includes two side beams and two crossbeams parallel to each other in the middle of the two side beams. The two side beams are mounted on the axles via a primary suspension and axle boxes. Both side beams and axle boxes are located inside the wheels. Two brake hangers are provided on the outer side of each side beam for mounting braking devices. Each crossbeam has a motor hanger for suspending the drive motor. Each side beam also has a gearbox hanger for suspending the other end of the gearbox. This utility model solves the problem of high manufacturing difficulty in existing axle box-integrated bogies.

Description

Technical Field

[0001] This utility model relates to a subway vehicle bogie and belongs to the field of rail vehicle technology. Background Technology

[0002] Railway vehicle bogies can be divided into external axle box bogies and internal axle box bogies. Regarding external axle box bogies, after years of operational verification and optimization, it has been found that they not only suffer from large wheelset and frame mass, but also face significant challenges in terms of handling small-radius curves and adapting to tortuous tracks. Due to these difficulties with traditional external axle box bogie technology, the industry has begun to focus on the research and application of internal axle box bogies.

[0003] Regarding axle box-integrated bogies, in the prior art, Chinese invention patent application publication number CN108032865A discloses a lateral drive axle box-integrated bogie, which includes a frame with axles at both the front and rear ends, with wheels mounted at both ends of the two axles. The frame is mounted on the axles via a primary suspension device and axle boxes, and the frame includes two side beams, with two crossbeams arranged parallel to each other in the middle of the two side beams. Both the frame and the axle boxes are arranged inside the wheels. Four basic braking devices are symmetrically arranged at the bottom of the two side beams of the frame. Two drive motors and two gearboxes are fixedly connected to the two crossbeams of the frame. The output shafts of the two drive motors are parallel to the axles, and the output shafts of the two drive motors are connected to the axles via gearboxes. This patent allows the axle boxes to be mounted on the axles, so that both the frame and the axle boxes are arranged inside the two pairs of wheels, reducing the overall lateral dimension of the bogie. By symmetrically arranging the four basic braking device mounting seats at the bottom of the two side beams, space is made up for the installation of other equipment on the frame, enabling both disc braking and tread braking.

[0004] The lateral drive axle box-integrated bogie in this patent presents significant manufacturing challenges. These challenges stem primarily from the following aspects:

[0005] 1. Because the frame and axle boxes are arranged inside the two pairs of wheels and the two gearbox mounting brackets are mounted on the two crossbeams of the frame (see its appendix) Figure 2 and attached Figure 4 This results in insufficient installation space on the crossbeam for other mounting seats, such as the traction device tie rod seat and the secondary vertical damper mounting seat, making it difficult to meet welding quality requirements.

[0006] 2. Because the crossbeam has a conventional three-section structure, i.e., a stepped shaft structure, the installation space on the crossbeam is limited, which also increases the difficulty of the manufacturing process.

[0007] 3. Due to the presence of numerous mounting bases for secondary vertical dampers and drive units, the installation space requirements are high, resulting in significant manufacturing difficulties. Utility Model Content

[0008] The present invention aims to provide a subway vehicle bogie that solves the problem of high manufacturing difficulty of existing axle box-integrated bogies.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A subway vehicle bogie includes a frame with axles at both ends. Each axle has wheels mounted at both ends and a gearbox with a drive motor connected to one end mounted on each axle. The frame includes two side beams and two crossbeams parallel to each other in the middle of the two side beams. The two side beams are mounted on the axles via a primary suspension and axle boxes. Both side beams and axle boxes are located inside the wheels. Each side beam has two brake hangers on its outer side for mounting braking devices. Each crossbeam has a motor hanger for suspending the drive motor. Each side beam has a gearbox hanger for suspending the other end of the gearbox.

[0011] Furthermore, each crossbeam is equipped with a tie rod damper integrated seat for mounting the traction rod and the secondary vertical damper.

[0012] Furthermore, each crossbeam is a monolithic beam structure.

[0013] Furthermore, each crossbeam and each axle is hollow.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] 1. In the case of the metro vehicle bogie of this utility model, where both the frame and axle box are arranged inside the wheel, the gear box hanger is changed from being set on the frame crossbeam in the traditional way to the frame side beam. This solves the problem of the high manufacturing difficulty of the existing axle box built-in bogie and meets the space requirements and welding quality requirements of the mounting seats on the frame crossbeam.

[0016] 2. The metro vehicle bogie of this utility model integrates the traditional traction rod seat and secondary vertical shock absorber seat by setting up a tie rod damper integrated seat for installing traction rods and secondary vertical shock absorbers, thereby reducing the original space occupied, improving the structural compactness, and further reducing the manufacturing difficulty of existing axle box built-in bogies.

[0017] 3. The subway vehicle bogie of this utility model sets the crossbeam as an integral beam structure, that is, the crossbeam adopts an integrated structure, which changes the traditional three-section welded structure of the crossbeam frame. The crossbeam is a single integral beam, which reduces the manufacturing and processing difficulty of the crossbeam and facilitates the installation of each mounting seat on the crossbeam. It avoids the superposition of welding stress caused by the small weld spacing of each mounting seat, improves the welding quality, and further reduces the manufacturing difficulty of the existing axle box built-in bogie.

[0018] 4. The subway vehicle bogie of this utility model has hollow crossbeams and axles, which reduces the manufacturing and processing difficulty, reduces the manufacturing difficulty of existing axle box built-in bogies, reduces unsprung mass, and reduces the overall weight of the bogie. Compared with external bogies, the overall weight is reduced by about 15%, which improves the vehicle's curve handling performance.

[0019] 5. The subway vehicle bogie of this utility model adopts a split structure for the axle box, which not only saves space for the installation of the drive unit, namely the drive motor and gearbox, but also provides space for the maintenance of the bearings inside the axle box, further reducing the manufacturing difficulty of the existing axle box built-in bogie. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of one embodiment of the present invention;

[0021] Figure 2 This is a top view of one embodiment of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of one embodiment of the present invention;

[0023] Figure 4 This is a top view of the structure of the present invention;

[0024] Figure 5 This is a three-dimensional structural diagram of the integrated seat of the tie rod vibration damper of this utility model;

[0025] Figure 6 This is a cross-sectional view of the integrated base of the tie rod vibration damper described in this utility model;

[0026] Figure 7 This is a three-dimensional structural diagram of the axle box described in this utility model.

[0027] In the diagram: 1. Car body; 2. Axle; 3. Wheel; 4. Frame; 41. Side beam; 42. Crossbeam; 43. Brake hanger; 44. Gearbox hanger; 45. Motor hanger; 46. Tie rod damper integrated seat; 47. Secondary suspension air spring mounting seat; 48. Lateral stop seat; 49. Anti-roll seat; 5. Gearbox; 51. Hanger rod; 6. Drive motor; 7. Axle box; 71. Axle box body; 8. Primary suspension; 9. Secondary suspension; 91. Secondary suspension air spring; 92. Secondary vertical damper; 93. Secondary lateral damper; 94. Secondary lateral stop; 10. Traction device; 101. Traction seat; 102. Traction connection seat; 103. Traction rod; 11. Secondary lateral damper mounting and lifting integrated seat; 12. Axle box tie rod; 13. Axle box tie rod seat. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] See Figures 1 to 7 This embodiment provides a bogie with built-in axle boxes for subway vehicles. The bogie includes a frame 4 with axles 2 at both the front and rear ends. Wheels 3 are mounted on both ends of the two axles 2. A gearbox 5 with a drive motor 6 connected to one end is mounted on each of the two axles 2. Axle boxes 7 are respectively installed on the axles 2 inside the wheels 3. The two ends of the frame 4 are mounted on the axles 2 through a primary suspension 8 and the axle boxes 7. In this way, the frame 4 and the axle boxes 7 are arranged inside the two pairs of wheels 3, thereby reducing the overall lateral dimension of the bogie, which can accommodate the extremely small vehicle underrun clearance, and also reduces the torsional stiffness of the bogie, improving the curve clearance capability.

[0030] See Figure 2 , Figure 4 The frame 4 is orthogonally connected by two side beams 41 and two cross beams 42. Each side beam 41 has two brake hanger seats 43 on its outer side for mounting the braking device, thus providing space for the installation of other equipment on the frame 4 and enabling both disc braking and tread braking. Each side beam 41 has a gearbox hanger seat 44 on its inner side for suspending the other end of the gearbox 5. Thus, with both the frame 4 and the axle box 7 internally mounted, replacing the traditional placement of the gearbox hanger seat 44 on the cross beam 42 of the frame 4 with a side beam 41 not only solves the manufacturing difficulties but also meets functional requirements. This addresses the manufacturing difficulties of existing axle box 7-integrated bogies and satisfies the space and welding quality requirements for the mounting seats on the cross beams 42 of the frame 4. Each crossbeam 42 is equipped with a motor mounting bracket 45 for suspending the drive motor 6, a tie rod damper integrated bracket 46 for installing the traction rod 103 and the secondary vertical damper 92, and a secondary lateral damper installation and lifting integrated bracket 11. See also... Figure 1Both ends of the two side beams 41 are mounted on the axle 2 via a primary suspension 8 and an axle box 7, respectively. See also Figure 2 Both side beams 41 and axle box 7 are arranged inside wheel 3.

[0031] See Figure 5 , Figure 6 The tie rod damper integrated seat 46 integrates the traditional traction tie rod 103 seat and secondary vertical damper 92 seat, reducing the original space occupied, improving structural compactness, and further reducing the manufacturing difficulty of the existing axle box 7 built-in bogie.

[0032] See Figure 2 , Figure 4 To avoid the superposition of welding stress caused by excessively small weld spacing between mounting seats, each crossbeam 42 is designed as a one-piece molded beam structure. The one-piece structure of the crossbeam 42 can improve the welding quality of the entire bogie, reduce the manufacturing and processing difficulty of the crossbeam 42, and reduce the manufacturing difficulty of the existing axle box 7 built-in bogie.

[0033] See Figure 2 , Figure 4 , Figure 5 Each crossbeam 42 and each axle 2 is hollow, which reduces the difficulty of manufacturing and processing, reduces the manufacturing difficulty of the existing axle box 7 built-in bogie, reduces the unsprung mass and the overall weight of the bogie, and reduces the overall weight of the bogie by about 15% compared with the external bogie, thus improving the vehicle's cornering performance.

[0034] See Figure 3 , Figure 7 The axle box 7 includes an axle box body 71 and bearings and other components disposed inside the axle box body 71. The axle box body 71 adopts a split structure, that is, it consists of an upper and lower shell. The mounting bolts of the axle box body 71 are adjusted from the position of the axle box 7 to the radial position relative to the axle 2. This not only makes room for the installation of the drive unit, namely the drive motor 6 and the gearbox 5, but also provides space for the maintenance of the bearings inside the axle box 7, further reducing the manufacturing difficulty of the existing axle box 7 built-in bogie.

[0035] See Figure 2 , Figure 4One end of the gearbox 5 is mounted on the axle 2, and the other end is suspended from the gearbox mounting seat 44 via a hanger rod 51. The axle box 7 is connected to the axle box tie rod seat 13 at the bottom of the side beam 41 via the axle box tie rod 12. The frame 4 is equipped with a secondary suspension 9, which includes two secondary air springs 91, two secondary vertical dampers 92, two secondary lateral dampers 93, and two secondary lateral stops 94. Each side beam 41 has a secondary air spring mounting seat 47 in the middle for mounting the secondary air springs 91, and a lateral stop seat 48 for mounting the secondary lateral stops 94 on the inner side of the middle of each side beam 41, located between the two cross beams 42. Each side beam 41 has an anti-roll seat 49 on the outer side for mounting the anti-roll device. The frame 4 is also equipped with a traction device 10 and an anti-roll device. The traction device 10 includes a traction seat 101 mounted on the vehicle body 1, a traction connecting seat 102 located between two crossbeams 42, and a traction rod 103. The gearbox hanger 44, which was traditionally located on the crossbeam 42 of the frame 4, is changed to a side beam 41 of the frame 4, providing reasonable space for the arrangement of the traction rod 103.

[0036] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention is not limited to the specific embodiments described above; these embodiments are merely illustrative and not limiting. Those skilled in the art, under the guidance of the present invention, can make many modifications without departing from the spirit and scope of the claims, and all such modifications fall within the protection scope of the present invention.

Claims

1. A subway vehicle bogie, comprising a frame (4) with axles (2) at both ends, each axle (2) having wheels (3) mounted at both ends, and a gearbox (5) with a drive motor (6) connected to one end mounted on each axle (2); the frame (4) comprises two side beams (41) and two crossbeams (42) arranged parallel to each other in the middle of the two side beams (41), the two side beams (41) being mounted on the axles (2) via a primary suspension (8) and an axle box (7), the two side beams (41) and the axle box (7) being arranged inside the wheels (3); each side beam (41) having two brake hangers (43) for mounting brake devices on its outer side, and each crossbeam (42) having a motor hanger (45) for suspending the drive motor (6); characterized in that, Each side beam (41) is provided with a gearbox hanger (44) for suspending the other end of the gearbox (5).

2. The metro vehicle bogie according to claim 1, characterized in that, Each crossbeam (42) is provided with a tie rod damper integrated seat (46) for mounting the traction tie rod (103) and the secondary vertical damper (92).

3. The metro vehicle bogie according to claim 1 or 2, characterized in that, Each crossbeam (42) is a monolithic beam structure.

4. The metro vehicle bogie according to claim 3, characterized in that, Each crossbeam (42) and each axle (2) is hollow.

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