Rubber-tired metro bogie frame and rubber-tired metro bogie

Abstract

Provided in the present invention are a rubber-tired metro bogie frame and a rubber-tired metro bogie. The bogie frame comprises a cross beam, and four electric motor mounting seats are symmetrically arranged on two sides of the cross beam in a longitudinal direction, the electric motor mounting seats on the same side being arranged spaced apart from each other. The present invention significantly shortens the length of the bogie frame, solves the problems of insufficient rigidity and large processing deformation caused by an elongated bogie frame, and improves the overall rigidity and manufacturability of the bogie frame.

Description

A rubber-wheeled subway frame and bogie Technical Field

[0001] The present invention belongs to the technical field of rail transportation, and in particular relates to a rubber-wheel subway frame and a bogie. Background Art

[0002] With the advancement of science and technology, high-comfort, low-noise rubber-tyred rail transit products are constantly developing. Because rubber tires are used for load-bearing and guidance, rubber-tyred subways have significantly superior climbing ability, curve noise, and vehicle comfort compared to conventional steel-wheeled rail vehicles.

[0003] Traditional rubber-tire subway bogies feature a single or dual motor longitudinally arranged in the middle of the bogie. For example, U.S. Patent US2018273058A1 discloses a single-motor longitudinally arranged rubber-tire subway bogie, while French Patent FR2169448A5 discloses a dual-motor longitudinally arranged rubber-tire subway bogie. However, a single-motor longitudinal arrangement results in a narrow central bogie space, making inspection and maintenance difficult. Placing dual motors in the bogie results in excessive weight at the bogie ends, causing severe vibration, and the dual-motor longitudinal arrangement requires a very narrow and long frame design.

[0004] Secondly, the bogies of traditional rubber-tyred subways use tread braking, with safety wheels acting as brake wheels, and brakes located at the four ends of the bogie. However, due to the large size of the safety wheels themselves, placing brakes at the ends also results in a narrow and long bogie structure. Furthermore, the ends are heavy and subject to severe vibration.

[0005] Traditional rubber-tyred metro train axles incorporate a differential function. The motor is connected to the axle differential input shaft via a coupling or gears. The axle simultaneously drives both wheels, achieving wheel speed control. However, the use of a differential axle complicates its internal structure, resulting in increased lifespan and cost.

[0006] Finally, traditional rubber-tyred subway trains utilize rectangular or long strip structures, suspended elastically or rigidly on the front and rear axles. However, these long strip structures are not only large in size and weight, but also result in significant welding deformation and poor workability. Furthermore, they suffer from low lateral stiffness.

[0007] Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a rubber-tyred subway frame and bogie with small longitudinal dimensions, high structural strength and space utilization.

[0009] In order to solve the above technical problems, the specific technical solutions of the present invention are as follows:

[0010] A rubber-wheeled subway frame includes a crossbeam, two motor mounting seats are provided on both sides of the crossbeam in the longitudinal direction, and the two motor mounting seats on the same side are arranged at intervals; the four motor mounting seats are symmetrical about the longitudinal center plane of the frame, and the four motor mounting seats are also symmetrical about the transverse center plane of the frame.

[0011] Therefore, the present application sets four motor mounting bases on the crossbeam, and the four motor mounting bases are arranged completely symmetrically, so that the motors installed on the four motor mounting bases are also arranged completely symmetrically. By setting wheels or other components on the motors, compared with the traditional rubber-wheeled subway frame, the present application eliminates the side beams and end beams of the frame, greatly shortens the length of the frame, solves the problems of insufficient rigidity and large processing deformation caused by the long strip frame, and improves the overall rigidity and processability of the frame. Among them, the transverse center plane refers to a vertical plane parallel to the transverse direction of the frame and passing through the center of the frame, and the longitudinal center plane refers to a vertical plane parallel to the longitudinal direction of the frame and passing through the center of the frame.

[0012] Furthermore, a transverse stop mounting seat is provided on the upper surface of the crossbeam, and the transverse stop mounting seat is located at the center of the crossbeam.

[0013] Furthermore, two empty spring mounting seats are provided on the upper surface of the crossbeam, and the two empty spring mounting seats are symmetrically arranged relative to the longitudinal center line of the crossbeam.

[0014] Furthermore, two vertical shock absorber mounting seats, two traction mounting seats and two lateral shock absorber mounting seats are provided on the upper surface of the crossbeam, and the two vertical shock absorber mounting seats, the two traction mounting seats and the two lateral shock absorber mounting seats are all arranged symmetrically relative to the center of the crossbeam.

[0015] Furthermore, two groups of return flow device mounting seats are provided on the lower surface of the crossbeam, and the two groups of return flow device mounting seats are symmetrically arranged relative to the longitudinal center line of the crossbeam.

[0016] Furthermore, two reflux device mounting seats are provided on the lower surface of the crossbeam, and the two reflux device mounting seats are symmetrically arranged relative to the longitudinal center line of the crossbeam.

[0017] Based on the same inventive concept, the present invention also provides a rubber-wheeled subway bogie, which includes the rubber-wheeled subway frame as described above, and a motor is installed on each of the motor mounting seats; the motor includes an outer shell and a motor shaft, and a rim is rotatably mounted on the outer end of the outer shell, and a load-bearing rubber wheel and a safety wheel are fixedly mounted on the rim, and the motor shaft is used to drive the rim.

[0018] Load-bearing rubber wheels Therefore, the present application adopts four motors symmetrically arranged on both sides of the longitudinal direction of the crossbeam, and each motor drives a safety wheel and a load-bearing rubber wheel separately. In this way, the traditional axle with differential is eliminated, and the gear wear problem in the use of traditional axles is avoided. The direct drive mode of the motor can prevent the left and right axles from getting stuck due to the large differential speed of the left and right wheels. At the same time, the direct drive wheel mode of the motor realizes the axle end deceleration and the installation of safety wheels and load-bearing rubber wheels when the axle end space is small. The motor adopts a load-bearing casing solution, which eliminates the high-rigidity single-spring structure on the traditional rubber-wheel vehicle. The frame is directly connected to the motor rigidly, and the load-bearing rubber wheel assumes the vibration reduction function of the traditional single-series suspension.

[0019] Furthermore, a brake is installed on the outer shell of the motor, and a brake disc is provided at the inner end of the motor shaft, and the brake and the brake disc cooperate with each other.

[0020] Furthermore, a guide wheel is mounted on the housing of the motor. The motor adopts a load-bearing housing solution so that the brake does not need to be installed at the end of the bogie, and the frame does not need to be extended to the bogie to provide a guide wheel mounting seat.

[0021] Furthermore, the motor shaft and wheel rim are coupled via a planetary gear mechanism comprising a planetary carrier, an inner gear ring mounted on the wheel rim, and a sun gear mounted on the outer end of the motor shaft. The planetary carrier is fixedly connected to the motor housing. When the motor shaft rotates relative to the housing, the planetary carrier remains stationary, and the rotational force of the motor shaft is transmitted to the wheel rim via the inner gear ring of the wheel rim, thereby driving the rotation of the wheel rim, the load-bearing rubber tire, and the safety wheel. The use of a planetary gear mechanism reduces the size of the outer end of the motor shaft and facilitates routine maintenance. It also reduces speed and increases torque, reducing the size of the motor.

[0022] Furthermore, the bogie also includes a rocker arranged above the crossbeam, and a traction rod, an air spring, a lateral shock absorber, and a vertical shock absorber are arranged between the rocker and the crossbeam; a slewing bearing is arranged on the upper surface of the rocker.

[0023] The rubber-tyred subway frame and bogie of the present invention have the following advantages:

[0024] Compared to traditional rubber-wheeled subway frames, this invention significantly shortens the frame length, resolves the issues of insufficient rigidity and significant processing deformation associated with long, strip-shaped frames, and improves the overall rigidity and manufacturability of the frame. By directly driving the wheels with a motor, the traditional differential axle is eliminated, avoiding the gear wear associated with traditional axles. Furthermore, direct motor drive prevents the left and right axles from jamming due to excessive differential speeds. Furthermore, direct motor drive allows for both axle-end reduction and the installation of safety wheels and load-bearing rubber tires, even when space at the axle end is limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of a rubber-tyred subway bogie according to the present invention;

[0026] FIG2 is a top view of a rubber-tyred subway bogie according to the present invention;

[0027] FIG3 is a front view of a rubber-tyred subway bogie according to the present invention;

[0028] FIG4 is a side view of a rubber-tyred subway bogie according to the present invention;

[0029] FIG5 is a cross-sectional view of FIG4;

[0030] FIG6 is a partial enlarged schematic diagram of FIG5;

[0031] FIG7 is a schematic diagram of the structure of the framework of the present invention from a first viewing angle;

[0032] FIG8 is a schematic diagram of the structure of the framework of the present invention from a second viewing angle;

[0033] FIG9 is a top view of the structure of the present invention;

[0034] FIG10 is a front view of the structure of the present invention;

[0035] FIG11 is a side view of the frame of the present invention;

[0036] FIG12 is a schematic diagram of the bolster structure of the present invention;

[0037] Figure 13 is a top perspective view of the bolster;

[0038] FIG. 14 is a bottom perspective view of the bolster.

[0039] Explanation of the marks in the figure: 1. Crossbeam; 11. Motor mounting seat; 12. Lateral stop mounting seat; 13. Air spring mounting seat; 14. Vertical shock absorber mounting seat; 15. Traction mounting seat; 16. Lateral shock absorber mounting seat; 17. Return flow device mounting seat; 18. Current receiver mounting seat; 2. Motor; 21. Motor shaft; 22. Safety wheel; 23. Load-bearing rubber wheel; 24. Brake; 25. Brake disc; 26. Guide wheel; 27. Rim; 28. Planetary gear mechanism; 28.1. Planetary carrier; 28.2. Inner ring gear; 28.3. Sun gear; 29. ​​Housing; 30. Traction rod; 31. Air spring; 32. Lateral stop; 33. Lateral shock absorber; 34. Vertical shock absorber; 35. Rocker; 35.1. Slewing bearing mounting seat; 36. Slewing bearing. DETAILED DESCRIPTION

[0040] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0041] As shown in Figure 1, the rubber-tire subway bogie of this embodiment includes a frame, which is a welded structure. As shown in Figures 6 to 11, the frame includes a crossbeam 1, and four motor mounting seats 11 are symmetrically arranged on both sides of the longitudinal direction of the crossbeam 1. The motor mounting seats 11 on the same side are spaced apart, that is, two motor mounting seats 11 are arranged on both sides of the longitudinal direction of the crossbeam 1, and the two motor mounting seats 11 on the same side are spaced apart; the four motor mounting seats 11 are symmetrical about the longitudinal center plane of the frame, and the four motor mounting seats 11 are also symmetrical about the transverse center plane of the frame. A transverse stop mounting seat 12 is provided on the upper surface of the crossbeam 1, and the transverse stop mounting seat 12 is arranged at the center of the crossbeam 1. Two empty spring mounting seats 13 are provided on the upper surface of the crossbeam 1, and the empty spring mounting seats 13 are symmetrically arranged relative to the longitudinal center line of the crossbeam 1. The upper surface of the crossbeam 1 is provided with two vertical damper mounting blocks 14, two traction mounting blocks 15, and two lateral damper mounting blocks 16. These two vertical damper mounting blocks 14, two traction mounting blocks 15, and two lateral damper mounting blocks 16 are all arranged symmetrically relative to the center of the crossbeam 1. As shown in Figures 1 and 2, the traction and suspension device of this embodiment mainly includes a diagonally symmetrically arranged traction rod 30, air springs 31 arranged on both sides, a centrally arranged lateral stop 32 and lateral damper 33, and a diagonally symmetrical vertical damper 34.

[0042] As shown in Figure 8, the lower surface of the crossbeam 1 is provided with two sets of return flow mounts 17, symmetrically arranged about the longitudinal centerline of the crossbeam 1. The lower surface of the crossbeam 1 is also provided with two return flow mounts 18, symmetrically arranged about the longitudinal centerline of the crossbeam 1. As shown in Figures 1 and 8, the current collector and return flow collector of this embodiment are mounted in the middle of the frame, providing current collection and return for the vehicle.

[0043] As shown in Figures 1 to 6, a motor 2 is mounted on each of the motor mounting bases 11, and the two motors 2 mounted on the same side of the beam 1 are fixedly connected. As shown in Figure 5, each of the motors 2 drives a motor shaft 21 to rotate. The motor 2 includes a housing 29 (stator) and a motor shaft 21. A rim 27 is rotatably mounted on the outer end of the housing 29 (the housing 29 and the rim 27 are rotatably connected via a bearing). A load-bearing rubber wheel 23 and a safety wheel 22 are fixedly mounted on the rim 27. The motor shaft 21 is used to drive the rim 27 to rotate. The safety wheel is a rigid wheel, such as a steel rail wheel of a traditional rail vehicle. As shown in Figures 2, 4 and 5, the housing 29 of the motor 2 adopts a load-bearing structure, and a brake 24 and a guide wheel 26 are mounted on the housing. As shown in Figures 2 to 4, the guide wheel 26 of this embodiment adopts a traditional tire rim structure, and the guide wheel 26 is directly mounted on the motor via a guide rod. The brake 24 and brake disc 25 cooperate with each other, as shown in Figures 4-6. This embodiment utilizes a motor shaft disc brake. The brake disc 25 is located at the inner end of the motor shaft, and the brake 24 is mounted on the motor housing. The motor shaft 21 and rim 27 are coupled via a planetary gear mechanism 28. This planetary gear mechanism comprises a planetary carrier 28.1, an inner ring gear 28.2 located on the rim 27, and a sun gear 28.3 located on the outer end of the motor shaft 21. The planetary carrier 28.1 is fixedly connected to the outer housing 29 of the motor 2. When the motor shaft 21 rotates relative to the outer housing 29, since the planetary carrier 28.1 is stationary, the rotational force of the motor shaft 21 is transmitted to the rim 27 via the inner ring gear 28.2 of the rim 27, thereby driving the rotation of the rim 27, the load-bearing rubber tire 23, and the safety wheel 22. The planetary gear mechanism 28 reduces speed and increases torque, thereby reducing the size of the motor 2.

[0044] As shown in Figures 12 and 14 , the bolster 35 of this embodiment adopts an integral welded structure. The lower surface of the bolster 35 is provided with an air spring mount 13, a vertical damper mount 14, a traction mount 15, and a transverse damper mount 16 corresponding to the frame. A traction rod 30, an air spring 31, a transverse damper 33, and a vertical damper 34 are disposed between the frame (crossbeam 1) and the bolster 35. One end of the traction rod 30 is connected to the traction mount 15 on the crossbeam 1, and the other end is connected to the traction mount 15 on the bolster 35. The lower end of the air spring 31 is connected to the air spring mount 13 on the crossbeam 1, and the upper end is connected to the air spring mount 13 on the bolster 35. The connections between the transverse damper 33 and the vertical damper 34 are similar to those between the traction rod 30 and the air spring 31. The bolster 35 is equipped with a slewing bearing mounting seat 35.1 on its upper surface. The slewing bearing 36 utilizes a two-ring structure, with the outer ring bolted to the slewing bearing mounting seat 35.1 of the bolster 35, and the inner ring bolted to the vehicle body (not shown). This facilitates the transmission of traction and braking forces between the bolster 35 and the frame, and the lifting of the entire bogie. The bolster and slewing bearing assembly connects the vehicle underframe and frame, and accommodates the relative rotation angle between the vehicle body and bogie when the vehicle negotiates tight curves.

[0045] The frame of this embodiment has a smaller longitudinal dimension, which improves its structural strength and reduces its weight. This embodiment employs a motor-driven wheel system, changing the traditional longitudinal motor layout. This provides a larger central area for operation and maintenance, improving the maintainability of the bogie and vehicle. The traditional axle structure with a differential is eliminated, reducing the use and maintenance of gears, bearings, and other wear parts caused by traditional axle transmission and differentials. A planetary gear mechanism is also provided as a wheel-side reduction device, significantly reducing the size and weight of the direct-drive motor. Furthermore, the motor utilizes a load-bearing housing design, and the frame is directly rigidly connected to the front and rear motors. This means that the frame and wheelset motor assembly utilize a shaft-clamping connection, reducing the number of suspension components and improving component connection reliability. The high-rigidity spring structure found on traditional rubber-tyred vehicles is eliminated, and a hydraulic brake is installed at the rear of the motor, replacing the traditional tread brake. This eliminates the need for brakes installed at the ends of the bogie, significantly reducing the longitudinal dimension of the bogie (particularly the frame length) and significantly reducing the weight of the brake itself and the associated bogie weight.

[0046] As a result, the structure of the rubber-tire subway bogie is greatly simplified, especially the traditional differential axle is eliminated, which to a considerable extent solves the problem of gear wear during the use of traditional axles. The direct drive method of the motor can completely avoid the problem of the left and right axles getting stuck due to the excessive differential speed of the left and right wheels, and the differential speed of the left and right wheels can be controlled so that one side is fixed and the other side rotates. Traditional differentials will have the problem of getting stuck when the speed difference between the left and right sides is large. In addition, compared with traditional rubber-tire subway bogies, the present invention greatly shortens the bogie length, solves the problems of insufficient rigidity and large processing deformation caused by the long strip frame, and improves the overall rigidity and processability of the frame.

[0047] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A rubber-tyred subway frame, comprising a crossbeam (1), characterized in that: Two motor mounting seats (11) are arranged on both sides of the crossbeam (1) in the longitudinal direction, and the two motor mounting seats (11) on the same side are arranged at intervals; the four motor mounting seats (11) are symmetrical about the longitudinal center plane of the frame, and the four motor mounting seats (11) are also symmetrical about the transverse center plane of the frame.

2. The rubber-tyred subway frame according to claim 1, characterized in that: A transverse stop mounting seat (12) is provided on the upper surface of the transverse beam (1), and the transverse stop mounting seat (12) is arranged at the center of the transverse beam (1).

3. The rubber-tyred subway frame according to claim 1, characterized in that: Two empty spring mounting seats (13) are provided on the upper surface of the cross beam (1), and the two empty spring mounting seats (13) are symmetrically arranged relative to the longitudinal center line of the cross beam (1).

4. The rubber-tyred subway frame according to claim 1, characterized in that: The upper surface of the cross beam (1) is provided with two vertical shock absorber mounting seats (14), two traction mounting seats (15) and two lateral shock absorber mounting seats (16); the two vertical shock absorber mounting seats (14), the two traction mounting seats (15) and the two lateral shock absorber mounting seats (16) are all arranged symmetrically relative to the center of the cross beam (1).

5. The rubber-tyred subway frame according to claim 1, characterized in that: Two groups of return flow device mounting seats (17) are provided on the lower surface of the cross beam (1), and the two groups of return flow device mounting seats (17) are symmetrically arranged relative to the longitudinal center line of the cross beam (1).

6. The rubber-tyred subway frame according to claim 1, characterized in that: Two return flow device mounting seats (18) are provided on the lower surface of the cross beam, and the two return flow device mounting seats are symmetrically arranged relative to the longitudinal center line of the cross beam.

7. A rubber-tyred subway bogie, characterized in that: It comprises a rubber-tyred subway frame as described in any one of claims 1 to 6, wherein a motor (2) is mounted on each of the motor mounting seats (11); the motor comprises a housing and a motor shaft, a rim is rotatably mounted on the outer end of the housing, a load-bearing rubber wheel and a safety wheel are fixedly mounted on the rim, and the motor shaft is used to drive the rim.

8. The rubber-tyred subway bogie according to claim 7, characterized in that: A brake (24) is installed on the outer shell of the motor (2), a brake disc (25) is provided at the inner end of the motor shaft (21), and the brake (24) and the brake disc (25) cooperate with each other.

9. The rubber-tyred subway bogie according to claim 7, characterized in that: A guide wheel (26) is installed on the outer shell of the motor (2).

10. The rubber-tyred subway bogie according to claim 7, characterized in that: The motor shaft (21) and the wheel rim (27) are matched via a planetary gear mechanism (28), the planetary gear mechanism (28) comprising a planet carrier (28.1), an inner gear ring (28.2) arranged on the wheel rim (27), and a sun gear (28.3) arranged on the outer end of the motor shaft (21), the planet carrier (28.1) being fixedly connected to the outer shell (29) of the motor (2).

11. The rubber-tyred subway bogie according to claim 7, characterized in that: The bogie also includes a bolster (35) arranged above the crossbeam (1); a traction rod (30), an air spring (31), a lateral shock absorber (33), and a vertical shock absorber (34) are arranged between the bolster (35) and the crossbeam (1); and a slewing bearing (36) is arranged on the upper surface of the bolster (35).

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