Flexible direct-drive type steering rack

A bogie, direct-drive technology, applied in the direction of the bogie, the device for lateral relative movement between the underframe and the bogie, climate sustainability, etc., which can solve the problem of short service life, large wheelbase and poor reliability. and other problems to achieve the effect of reducing production costs, improving transmission efficiency and reducing weight

A bogie, direct-drive technology, applied in the direction of the bogie, the device for lateral relative movement between the underframe and the bogie, climate sustainability, etc., which can solve the problem of short service life, large wheelbase and poor reliability. and other problems to achieve the effect of reducing production costs, improving transmission efficiency and reducing weight

CN102963388AActive Publication Date: 2013-03-13CRRC NANJING PUZHEN CO LTD
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  • Flexible direct-drive type steering rack
  • Flexible direct-drive type steering rack
  • Flexible direct-drive type steering rack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 1 to Figure 10 As shown, the flexible direct-drive bogie of this embodiment consists of a bogie frame, two permanent magnet motors 4 (4') located on the front and rear sides of the bogie frame, and an air spring arranged above the bogie frame 9. The front and rear wheel sets are arranged under the bogie frame. The bogie frame has a left frame 1 and a right frame 8. The middle of the left frame 1 and the middle of the right frame 8 are fixed by a flexible cross beam 13 composed of four steel plates. Connected as a whole, there is a gap between the four steel plates, the axle of the wheel set passes through the central through hole provided in the permanent magnet motor 4 (4'), and the output shafts at both ends of the permanent magnet motor 4 (4') are respectively driven by elasticity The device 3 is fixed with the two wheels 2 of the wheel set, so that the permanent magnet motor 4 (4') is suspended between the wheel sets, and the shells of the two permane...

Embodiment 2

[0040] The structure of the second embodiment is the same as that of the first embodiment. The difference is that the parameters of the flexible beam are different. In this case, d=38mm, L=120mm; Z=25mm, the steel plate length is 1100mm, the angle between the steel plates α=66 degrees, and the steering The frame wheelbase is 1800mm and the steel plate material is P275. The torsional stiffness of the frame is 0.315 MN.m / rad and the shear stiffness is 102.98 MN.m / rad. The smaller torsional stiffness can adapt to worse lines, and the larger shear stiffness can Ensure the higher serpentine stability of the vehicle.

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Abstract

The invention relates to a flexible direct-drive type steering rack, which uses a flexible beam to enable a structure to be flexible. Left and right lateral racks easily do relative nodding movement, so as to be applicable to a triangular pit with a larger rail. The structure is flexible so that a series of suspension can be simplified to a very thin layer of rubber cushion, and the production cost is reduced; an elasticity transmission device is elastically suspended through a permanent magnet motor, so that the torque can be transmitted, the transmission efficiency can be improved, and the weight of a transmission mechanism can be reduced; a traction force and a braking force can be directly transmitted to a car body instead of the structure of the steering rack, and the stress condition of the structure of the steering rack is optimized; meanwhile, the length of a traction rod is not limited by the structure, so that the traction rod can be longer, the secondary addition rigidity brought by the traction rod can be reduced, and the riding comfort degree of a vehicle can be improved. A motor is suspended between wheel pairs, so that a shaft distance can be reduced. Therefore, the steering rack not only can have higher critical speed through a smaller curve, but also has good submissiveness on route irregularity.

Description

Technical field [0001] The invention relates to a flexible direct-drive bogie, belonging to the technical field of rail vehicle bogies. Background technique [0002] Traditional bogies generally use H-shaped frames, rigid beams, and rely on a series of vertical flexible suspensions to overcome the torsion and unevenness of the line. When the wheel sets travel to a gentle curve, the rigid frame will locally bear relatively large torque due to the super high curve track. When the vehicle speed is high, the connection between the frame and the first series of vertical flexible suspension will also receive a greater impact; in the traditional bogie structure design, the motor is installed on the frame to allow the motor and wheelset The dynamic disturbance and the transmission torque need to be set up with complicated couplings and gearboxes. This kind of bogie has a complex structure and low production efficiency, and the wheelbase of the bogie is large and heavy, which makes the bo...

Claims

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Application Information

Patent Timeline
13 Mar 2013
Publication
CN102963388A
IPC
B61F5/50; B61F5/04
CPC
B61F5/26; B61F3/04; B61F5/04; B61F5/50; B61C9/50; B61F5/52; Y02T30/00; B61F5/38
Inventors
楚永萍; 唐永明