A forced-guide radial bogie for straddle-type monorail vehicles

Abstract

The present invention provides a forced-guide radial bogie for a straddle-type monorail vehicle, which comprises a guide torsion bar device, a first bogie and a second bogie, wherein the first bogie and the second bogie are hinged, a first-position axle is arranged on the first bogie, a second-position axle is arranged on the second bogie, and running wheels in contact with the upper surface of a track are arranged in the middle of the first-position axle and the second-position axle; a connecting rod guiding device is arranged on both sides of the first bogie and the second bogie, and the connecting rod guiding device actively changes the angle between the first bogie and the second bogie, releases the longitudinal constraint on the running wheels, and makes the running wheels purely roll on the curved track without any lateral force, thereby improving the curve passing ability of the straddle-type monorail bogie, improving the lateral stability of the bogie in straight-line operation, improving the running quality of the vehicle, reducing the eccentric wear and abnormal noise of the running wheels of the monorail vehicle on the curve, and ensuring the driving safety.

Description

Technical Field

[0001] The invention relates to the field of rail vehicle design, in particular to a straddle-type monorail vehicle forced-guide radial bogie. Background Art

[0002] With the continuous development of urbanization, various types of transportation vehicles have emerged. Monorail vehicles, as a medium-capacity rail transit vehicle, have been gradually promoted and applied in China in recent years. The structure of straddle-type monorail vehicles is quite different from that of railway vehicles. As a classic type of urban rail transit, straddle-type monorail transportation has the characteristics of small turning radius, small footprint, strong climbing ability and comfortable ride, and has broad application prospects. However, when monorail vehicles pass through curves, the running wheels, guide wheels and stabilizing wheels are coupled, which makes the running wheels prone to tilt and lateral deviation. The lateral slip and lateral force of the tread will cause eccentric wear of the running wheels. There are many curves on the running line with small curvature, which makes the vehicle running wheel tires seriously eccentrically worn. Not only is the tire life cycle short, the repair and maintenance costs are high, but the adhesion of the running tires is greatly reduced, which reduces the driving efficiency of the straddle-type monorail vehicle and lengthens the braking distance, seriously affecting driving safety. Summary of the invention

[0003] In view of the above problems in the prior art, the present invention provides a forced-guide radial bogie for a straddle-type monorail vehicle, which solves the problem in the prior art that when a straddle-type monorail vehicle runs on a curved track, the tires of the running wheels are easily severely worn, which seriously affects the driving safety.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows:

[0005] Provided is a straddle-type monorail vehicle forced-guide radial bogie, comprising a guide torsion bar device, a first bogie and a second bogie, wherein the first bogie and the second bogie may be in a "U" shape, the closed end of the first bogie and the closed end of the second bogie are hinged, a first-position axle is arranged at the open end of the first bogie, a second-position axle is arranged at the opening of the second bogie, and the middle parts of the first-position axle and the second-position axle are both provided with running wheels in contact with the upper surface of the track;

[0006] The guide torsion bar device is fixedly connected to the vehicle body chassis, and the guide torsion bar device is hinged to one end of the first axle; a connecting rod guide device is arranged on both sides of the first bogie and the second bogie, and the connecting rod guide device includes a first connecting rod hinged to the end of the first axle and a second connecting rod hinged to the end of the second axle, an intermediate connecting rod is arranged between the first connecting rod and the second connecting rod, and three hinge holes are arranged on the intermediate connecting rod, and the hinge holes on both sides are hinged to the free ends of the first connecting rod and the second connecting rod respectively, and the intermediate connecting rod rotates around the intermediate hinge hole.

[0007] Taking the right turn of a monorail vehicle as an example, on the curved track, the guide torsion bar device is respectively connected to the first axle and fixed to the chassis of the previous car body, and the guide torsion bar device forces the first axle to rotate clockwise, and the clockwise twisting of the first axle drives the connecting rod guide device to move; the movement process of the connecting rod guide device located on the right side of the first bogie and the second bogie is: under the twisting of the first axle, the first connecting rod moves backward, driving the middle connecting rod to rotate counterclockwise around the middle hinge hole, and the counterclockwise rotating middle connecting rod drives the second connecting rod to move forward, and then the second connecting rod drives the entire second bogie to rotate counterclockwise relative to the first bogie. The connecting rod guide device located on the left side of the first bogie and the second bogie has an opposite movement form to the connecting rod guide device located on the right side. When the vehicle travels on a curved track, the front and rear vehicles generate a relative turning angle, and the connecting rod guide device works under force to actively change the angle between the first bogie and the second bogie, so that the first bogie and the second bogie present an "eight-shaped" shape. When passing a curved track, the running wheels are adjusted to the radial position of the curved track. In this position, the running wheels are in pure rolling without any lateral force generated, thereby improving the curve passing ability of the straddle-type monorail bogie, improving the lateral stability of the bogie in straight-line operation, improving the vehicle operation quality, effectively reducing the eccentric wear and abnormal noise of the running wheels of the straddle-type monorail vehicle on the curve, and ensuring the safety of driving.

[0008] Furthermore, the forced-guide radial bogie of the straddle-type monorail vehicle also includes a push-pull connecting rod with both ends hinged to the lower bottom surfaces of the first bogie and the second bogie respectively. The push-pull connecting rod assists the first bogie and the second bogie in relative rotation, so that when the forced-guide radial bogie of the straddle-type monorail vehicle travels on a complete track, an angle change between the two is inevitable.

[0009] Furthermore, the straddle-type monorail vehicle forced-guide radial bogie also includes a frame, which can be in an "H" shape. The frame is arranged on the top of the first bogie and the second bogie, and the running wheels on the first axle and the second axle are respectively arranged in openings at both ends of the frame; the middle connecting rod is hinged to the inner side wall of the frame through a middle hinge hole.

[0010] Furthermore, a plurality of positioning blocks are arranged on the frame, and the first axle and the second axle are movably connected to the frame through the plurality of positioning blocks. The frame can strengthen the strength of the entire bogie and ensure the stability of its structure.

[0011] Furthermore, in order to drive and brake the running wheels, braking devices are arranged on both sides of the frame, and the braking devices include multiple brake discs fixedly connected to one end of the first axle and the second axle respectively, and multiple brake calipers for clamping the brake discs, and the other ends of the first axle and the second axle are fixedly connected to a power device.

[0012] Furthermore, the power device is an electric motor.

[0013] Furthermore, in order to limit the rolling of the running wheels on the surface of the track, prevent the running wheels from deflecting, improve the guiding stability and anti-rollover resistance of the bogie, and improve the lateral stability of the vehicle in straight and curved driving, a plurality of guide wheels are fixedly arranged on both sides of the frame, and the plurality of guide wheels are respectively arranged on both sides of the first axle and the second axle, and the plurality of guide wheels are all in contact with the side wall of the track, and the axes of the plurality of guide wheels are perpendicular to the axes of the running wheels.

[0014] Furthermore, a safety wheel with an axis parallel to the axis of the guide wheel is fixedly arranged on both sides of the frame, and the gap between the outer walls of the two safety wheels and the side wall of the track is 2 to 5 cm. When the vehicle is running normally, the safety wheel does not contact the side wall of the track. When the guide wheel fails, the safety wheel provides fault protection to prevent the vehicle from overturning and rolling over, thereby improving the safety of vehicle driving.

[0015] Furthermore, a central traction device connected to the bottom of the frame is movably connected at the hinge of the first bogie and the second bogie. The central traction device is used to fix the entire bogie to the carriage.

[0016] Furthermore, two air springs connected to the bottom of the frame are fixedly arranged on the upper surface of the frame. The air springs are used to reduce and filter out vibrations transmitted from the bogie to the carriage, thereby improving the running quality of the wheels.

[0017] The beneficial effects of the present invention are as follows: the arrangement of the first bogie, the second bogie and the connecting rod guide device in this solution releases the longitudinal constraints on the running wheels, allowing the running wheels to roll purely on the curved track without any lateral force being generated, thereby improving the curve passing ability of the straddle-type monorail bogie, improving the lateral stability of the bogie in straight-line operation, improving the vehicle operation quality, and effectively reducing the eccentric wear and abnormal noise of the running wheels of the straddle-type monorail vehicle on the curve, thereby ensuring the safety of driving. The arrangement of the entire bogie in this solution is of great benefit to reducing the frequency of tire replacement, improving the running stability, saving operation and maintenance costs, and reducing environmental noise pollution for urban rail transit such as straddle-type monorail vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The diagram is a structural diagram of a forced-guide radial bogie for a straddle-type monorail vehicle.

[0019] Figure 2 It is a schematic diagram of the structure in which the first bogie and the second bogie are articulated.

[0020] Figure 3 It is a schematic diagram of the bottom view of the structure in which the first bogie and the second bogie are hinged.

[0021] Figure 4 A schematic diagram of the structure of the framework.

[0022] Among them, 1. guide torsion bar device; 2. first bogie; 3. second bogie; 4. first axle; 5. second axle; 6. running wheel; 7. connecting rod guide device; 701. first connecting rod; 702. second connecting rod; 703. middle connecting rod; 8. push-pull connecting rod; 9. frame; 10. positioning block; 11. brake disc; 12. brake caliper; 13. power unit; 14. guide wheel; 15. safety wheel; 16. center traction device; 17. air spring. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention are described below to facilitate those skilled in the art to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0024] like Figures 1 to 4 As shown, the present invention provides a straddle-type monorail vehicle forced-guide radial bogie, which includes a guide torsion bar device 1, a first bogie 2 and a second bogie 3. The first bogie 2 and the second bogie 3 can be in a "U" shape. The closed end of the first bogie 2 and the closed end of the second bogie 3 are hinged. A first axle 4 is provided at the open end of the first bogie 2, and a second axle 5 is provided at the opening of the second bogie 3. The first axle 4 and the second axle 5 are both provided with running wheels 6 in contact with the upper surface of the track in the middle. A central traction device 16 connected to the bottom of the frame is movably connected at the hinge of the first bogie 2 and the second bogie 3. The central traction device 16 is used to fix the entire bogie to the carriage.

[0025] The guide torsion bar device 1 is fixedly connected to the vehicle body frame, and the guide torsion bar device 1 is hinged to one end of the first axle 4; a connecting rod guide device 7 is arranged on both sides of the first bogie 2 and the second bogie 3, and the connecting rod guide device 7 includes a first connecting rod 701 hinged to the end of the first axle 4 and a second connecting rod 702 hinged to the end of the second axle 5, and an intermediate connecting rod 703 is arranged between the first connecting rod 701 and the second connecting rod 702, and three hinge holes are arranged on the intermediate connecting rod 703, and the hinge holes on both sides are respectively hinged to the free ends of the first connecting rod 701 and the second connecting rod 702, and the intermediate connecting rod 703 rotates around the intermediate hinge hole.

[0026] Taking the right turn of a monorail vehicle as an example, on the curved track, the guide torsion bar device 1 is respectively connected to the first axle 4 and fixed to the chassis of the previous car body, and the guide torsion bar device 1 forces the first axle 4 to rotate clockwise, and the clockwise twisting of the first axle 4 drives the connecting rod guide device 7 to move; the movement process of the connecting rod guide device 7 located on the right side of the first bogie 2 and the second bogie 3 is: under the twisting of the first axle 4, the first connecting rod 701 moves backward, driving the middle connecting rod 703 to rotate counterclockwise around the middle hinge hole, and the counterclockwise rotating middle connecting rod 703 drives the second connecting rod 702 to move forward, and then the second connecting rod 702 drives the entire second bogie 3 to rotate counterclockwise relative to the first bogie 2. The connecting rod guide device 7 located on the left side of the first bogie 2 and the second bogie 3 has an opposite movement form to the connecting rod guide device 7 located on the right side, so that the first bogie 2 and the second bogie 3 present an "eight-shaped" shape. When passing a curved track, the running wheel 6 is adjusted to the radial position of the curved track. In this position, the running wheel 6 is in pure rolling without any lateral force generated, thereby improving the curve passing ability of the straddle-type monorail bogie, improving the lateral stability of the bogie in straight-line operation, improving the vehicle operation quality, effectively reducing the eccentric wear and abnormal noise of the running wheel 6 of the straddle-type monorail vehicle on the curve, and ensuring the safety of driving.

[0027] The forced-guide radial bogie of the straddle-type monorail vehicle also includes a push-pull connecting rod 8 whose two ends are respectively hinged to the lower bottom surfaces of the first bogie 2 and the second bogie 3. The push-pull connecting rod 8 assists the first bogie 2 and the second bogie 3 in relative rotation, so that when the forced-guide radial bogie of the straddle-type monorail vehicle travels on a complete track, an angle change will inevitably occur between the two.

[0028] The straddle-type monorail vehicle forced-guide radial bogie also includes a frame 9, which can be in an "H" shape. The frame 9 is arranged on the top of the first bogie 2 and the second bogie 3. The running wheels 6 on the first axle 4 and the second axle 5 are respectively arranged in the openings at both ends of the frame 9; the intermediate connecting rod 703 is hinged to the inner side wall of the frame 9 through the intermediate hinge hole. A plurality of positioning blocks 10 are arranged on the frame 9, and the first axle 4 and the second axle 5 are movably connected to the frame 9 through the plurality of positioning blocks 10. The frame 9 can strengthen the strength of the entire bogie and ensure the stability of its structure.

[0029] Braking devices are arranged on both sides of the frame 9, and the braking devices include a plurality of brake discs 11 respectively fixedly connected to one end of the first axle 4 and the second axle 5 and a plurality of brake calipers 12 for clamping the brake discs 11. The other ends of the first axle 4 and the second axle 5 are fixedly connected to a power device 13, which can be a motor.

[0030] A plurality of guide wheels 14 are fixedly arranged on both sides of the frame 9. The plurality of guide wheels 14 are respectively arranged on both sides of the first axle 4 and the second axle 5. The plurality of guide wheels 14 are in contact with the side wall of the track. The axes of the plurality of guide wheels 14 are perpendicular to the axis of the running wheel 6. A safety wheel 15 is fixedly arranged on both sides of the frame 9, and the axis is parallel to the axis of the guide wheel 14. The gap between the outer wall of the two safety wheels 15 and the side wall of the track is 2 to 5 cm. The arrangement of the guide wheel 14 and the safety wheel 15 can limit the rolling of the running wheel 6 on the upper surface of the track, prevent the running wheel 6 from deflecting, improve the guiding stability and anti-overturning performance of the bogie, and improve the horizontal line stability of the vehicle in straight and curved driving; when the vehicle is driving normally, the safety wheel 15 does not contact the side wall of the track. When the guide wheel 14 fails, the safety wheel 15 provides fault protection to prevent the vehicle from overturning and rolling over, thereby improving the safety of the vehicle. Two air springs 17 connected to the bottom of the frame are fixedly arranged on the upper surface of the frame 9. The air spring 17 is used to reduce and filter the vibration transmitted from the bogie to the car body and improve the running quality of the wheel. The setting of the entire bogie in this scheme is of great benefit to urban rail transit such as straddle-type monorail vehicles in reducing the frequency of tire replacement, improving running stability, saving operating and maintenance costs, and reducing environmental noise pollution.

Claims

1. A straddle-type monorail vehicle forced-guide radial bogie, characterized in that: The invention comprises a guide torsion bar device (1), a first bogie (2) and a second bogie (3), wherein the first bogie (2) and the second bogie (3) are hinged, a first axle (4) is arranged on the first bogie (2), a second axle (5) is arranged on the second bogie (3), and running wheels (6) in contact with the upper surface of the track are arranged in the middle of the first axle (4) and the second axle (5); The guide torsion bar device (1) is fixedly connected to the vehicle body chassis, and the guide torsion bar device (1) is hinged to one end of the first axle (4); a connecting rod guide device (7) is provided on both sides of the first bogie (2) and the second bogie (3), and the connecting rod guide device (7) comprises a first connecting rod (701) hinged to the end of the first axle (4) and a second connecting rod (702) hinged to the end of the second axle (5); an intermediate connecting rod (703) is provided between the first connecting rod (701) and the second connecting rod (702); three hinge holes are provided on the intermediate connecting rod (703), and the hinge holes on both sides are respectively hinged to the free ends of the first connecting rod (701) and the second connecting rod (702), and the intermediate connecting rod (703) rotates around the intermediate hinge hole; the straddle-type monorail vehicle forced guide radial bogie also includes a push-pull connecting rod (8) whose two ends are respectively hinged to the lower bottom surfaces of the first bogie (2) and the second bogie (3); The straddle-type monorail vehicle forced-guide radial bogie further comprises an "H"-shaped frame (9), the frame (9) being arranged on the top of the first bogie (2) and the second bogie (3), the running wheels (6) on the first axle (4) and the second axle (5) being arranged in openings at both ends of the frame (9), respectively; the intermediate connecting rod (703) being hinged to the inner side wall of the frame (9) via an intermediate hinge hole.

2. The forced-guide radial bogie for a straddle-type monorail vehicle according to claim 1, characterized in that: A plurality of positioning blocks (10) are provided on the frame (9), and the first axle (4) and the second axle (5) are movably connected to the frame (9) via the plurality of positioning blocks (10).

3. The forced-guide radial bogie for a straddle-type monorail vehicle according to claim 2, characterized in that: Braking devices are provided on both sides of the frame (9), the braking devices comprising a plurality of brake discs (11) respectively fixedly connected to one end of the first axle (4) and the second axle (5) and a plurality of brake calipers (12) for clamping the brake discs (11), and a power device (13) is fixedly connected to the other ends of the first axle (4) and the second axle (5).

4. The forced-guide radial bogie for a straddle-type monorail vehicle according to claim 3, characterized in that: The power device (13) is an electric motor.

5. The forced-guide radial bogie for a straddle-type monorail vehicle according to claim 1, characterized in that: A plurality of guide wheels (14) are fixedly arranged on both sides of the frame (9), and the plurality of guide wheels (14) are respectively arranged on both sides of the first axle (4) and the second axle (5), and the plurality of guide wheels (14) are all in contact with the side wall of the track, and the axes of the plurality of guide wheels (14) are perpendicular to the axes of the running wheels (6).

6. The forced-guide radial bogie for a straddle-type monorail vehicle according to claim 5, characterized in that: A safety wheel (15) whose axis is parallel to the axis of the guide wheel (14) is fixedly arranged on both sides of the frame (9), and the gap between the outer walls of the two safety wheels (15) and the side wall of the track is 2 to 5 cm.

7. The forced-guide radial bogie for a straddle-type monorail vehicle according to claim 1, characterized in that: A central traction device (16) connected to the bottom of the vehicle frame is movably connected at the hinge between the first bogie (2) and the second bogie (3).

8. A straddle-type monorail vehicle forced-guide radial bogie according to claim 5, wherein two air springs (17) connected to the bottom of the frame are fixedly provided on the upper surface of the frame (9).

Images