Bogie suitable for low floor

Abstract

The invention discloses a bogie suitable for a low floor. The bogie comprises a framework, a motor, a driving wheel, a driven wheel, a driving gear box, a driven gear box and a transmission shaft. The driving gear box and the driven gear box are both fixed to the framework, the driving gear box is in transmission connection with the driving wheel, the driven gear box is in transmission connection with the driven wheel, and the transmission shaft is in transmission connection between the driving gear box and the driven gear box; the position of the transmission shaft is lower than the central positions of the driving wheel and the driven wheel; and the motor is in transmission connection with the driving gear box. The axle box and gear box integrated bearing structure is adopted, the gear box serves as a component part to be integrated into the framework, the structure is simplified, cost is reduced, the height of the transmission shaft and the height of a framework beam are effectively reduced, and therefore the height of a vehicle floor is reduced.

Description

Technical Field

[0001] The invention relates to a bogie suitable for a low-floor vehicle, belonging to the technical field of rail vehicles, in particular to a low-floor rail vehicle. Background Art

[0002] At present, low-floor vehicles mainly use motors to drive wheels, and then use the axle bridge structure to transmit power, so as to achieve the height reduction of the bogie area. Limited by the structure of low-floor bogie frame + axle bridge + primary spring + secondary spring, since the crossbeam of the frame usually has a certain height, and the position of the axle bridge is the same as the center of the wheel, the floor height of the bogie area is usually about 30mm higher than that of the low-floor area, and it is impossible to achieve a unified floor height for the whole vehicle. Summary of the invention

[0003] In order to overcome the problems existing in the prior art, the present invention provides a bogie suitable for a low-floor vehicle, which is beneficial to reducing the floor height of the bogie position of the low-floor vehicle. The specific technical solution is as follows.

[0004] A bogie suitable for low-floor vehicles, characterized in that it comprises: a frame, a motor, a driving wheel, a driven wheel, a driving gear box, a driven gear box, and a transmission shaft;

[0005] The driving gearbox and the driven gearbox are both fixed to the frame, the driving gearbox is drivingly connected to the driving wheel, the driven gearbox is drivingly connected to the driven wheel, and the transmission shaft is drivingly connected between the driving gearbox and the driven gearbox; the transmission shaft is located lower than the center position of the driving wheel and the driven wheel;

[0006] The motor is transmission-connected to the driving gear box.

[0007] By adopting the above technical solution, the motor transmits power (torque) to the driving gearbox, and the driving gearbox drives the driving wheel and the transmission shaft to rotate at the same time. The rotation of the transmission shaft drives the driven wheel to rotate through the driven gearbox, thereby realizing the lateral coupling drive of the driving wheel and the driven wheel of the bogie; at the same time, by adopting the above solution, the position of the transmission shaft can be set at a position lower than the center of the driving wheel and the driven wheel, which can greatly reduce the floor height of the bogie position of the low-floor vehicle.

[0008] Furthermore, the upper surfaces of the driving gearbox and the driven gearbox are both provided with secondary spring mounting seats, which can further reduce the height of the frame, thereby reducing the floor height of the low-floor vehicle.

[0009] Further, the driving gearbox is located inside the driving wheel, and the driven gearboxes are all located inside the driven wheels; the driving wheels are located outside the frame, and the driven wheels are also located outside the frame. The frame and the gearboxes are both located inside the wheels. Essentially, the driving gearbox and the driven gearboxes are used as traditional axle boxes, that is, the traditional axle boxes and gearboxes are integrated together, and the primary suspension springs connected between the axle boxes and the frame are cancelled, which not only simplifies the bogie structure but also reduces the weight of the bogie.

[0010] Further, the bogie includes two driving wheels, two driven wheels, two driving gearboxes, two driven gearboxes and two motors. Each motor is respectively drivingly connected to a driving gearbox. Preferably, the two motors are distributed along the diagonal of the frame. By arranging two motors, it is beneficial to evenly distribute the driving force and balance the center of gravity distribution of the bogie.

[0011] Further, the motor is installed under the vehicle body, and the motor is connected to the driving gearbox through a coupling. Preferably, the motor is located outside the driving wheel. The motor located outside the driving wheel can avoid the motor occupying the space between the wheels, which helps to reduce the floor height. The coupling can well adapt to the change in the relative position between the motor and the driving gearbox.

[0012] The present invention adopts an integrated bearing structure of the axle box and the gearbox, integrates the gearbox as a component into the frame, cancels the primary suspension spring structure, and realizes the simplification of the structure and the reduction of the cost. The height of the low-floor rail vehicle is limited by the height of the cross beam of the frame. The bogie of the present invention effectively reduces the height of the drive shaft and the cross beam of the frame by canceling the primary suspension spring, thereby reducing the vehicle floor height. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view of the bogie of the present invention;

[0014] Figure 2 is the top view of the bogie of the present invention;

[0015] Figure 3 is the side view of the bogie of the present invention.

[0016] In the figure: frame 1, motor 2, driving wheel 3, driven wheel 4, driving gearbox 5, driven gearbox 6, drive shaft 7, secondary suspension spring mounting seat 8, coupling 9. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] See Figures 1 - 3, A bogie applicable to low floors, comprising: a frame 1, a motor 2, a driving wheel 3, a driven wheel 4, a driving gearbox 5, a driven gearbox 6, and a transmission shaft 7;

[0019] The driving gearbox 5 and the driven gearbox 6 are both fixed to the frame 1. The driving gearbox 5 is in transmission connection with the driving wheel 3, the driven gearbox 6 is in transmission connection with the driven wheel 4, and the transmission shaft 7 is in transmission connection between the driving gearbox 5 and the driven gearbox 6; the position where the transmission shaft 7 is located is lower than the central positions of the driving wheel 3 and the driven wheel 4; the motor 2 is in transmission connection with the driving gearbox 5.

[0020] Wherein, second-stage spring mounting seats 8 are arranged on the upper surfaces of both the driving gearbox 5 and the driven gearbox 6. This can further reduce the height of the frame 1, thereby reducing the floor height of the low-floor vehicle.

[0021] Wherein, the driving gearbox 5 is located inside the driving wheel 3, and the driven gearbox 6 is located inside the driven wheel 4; the driving wheel 3 is located outside the frame 1, and the driven wheel 4 is also located outside the frame 1. The frame 1, the driving gearbox 5, and the driven gearbox 6 are all located inside the wheels (the driving wheel 3 and the driven wheel 4). Substantially, the driving gearbox 5 and the driven gearbox 6 are used as traditional axle boxes, that is, the traditional axle box and the gearbox are integrated together, and the first-stage spring connected between the axle box and the frame 1 is cancelled, which not only simplifies the bogie structure, but also reduces the weight of the bogie, and is also beneficial to reducing the floor height.

[0022] Preferably, the bogie includes two driving wheels 3, two driven wheels 4, two driving gearboxes 5, two driven gearboxes 6, and two motors 2. Each motor 2 is respectively in transmission connection with a driving gearbox 5. Preferably, the two motors 2 are distributed along the diagonal of the frame 1. By arranging two motors 2, it is beneficial to evenly distribute the driving force and balance the center-of-gravity distribution of the bogie.

[0023] Wherein, the motor 2 is installed below the vehicle body (not shown), and the motor 2 is connected to the driving gearbox 5 through a coupling 9. Preferably, the motor 2 is located outside the driving wheel 3. The motor 2 being located outside the driving wheel 3 can avoid the motor 2 occupying the space between the wheels, which helps to reduce the floor height. The coupling 9 can well accommodate the mutual position change between the motor 2 and the driving gearbox 5.

[0024] With the above technical solution, the motor 2 transmits power (torque) to the driving gearbox 5. The driving gearbox 5 includes multiple stages of gears (at least three gears) inside. The driving gearbox 5 simultaneously drives the driving wheel 3 and the transmission shaft 7 to rotate. The rotation of the transmission shaft 7 drives the driven wheel 4 to rotate through the driven gearbox 6, thereby realizing the lateral coupled drive of the driving wheel 3 and the driven wheel 4 of the bogie. At the same time, the position of the transmission shaft 7 is set lower than the central positions of the driving wheel 3 and the driven wheel 4, which can greatly reduce the floor height at the position of the bogie of the low-floor vehicle.

[0025] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. All of these fall within the protection scope of the present invention.

Claims

1. A bogie suitable for low-floor vehicles, characterized in that: include: Frame (1), motor (2), driving wheel (3), driven wheel (4), driving gear box (5), driven gear box (6), transmission shaft (7); The driving gear box (5) and the driven gear box (6) are both fixed to the frame (1); the driving gear box (5) is drivingly connected to the driving wheel (3); the driven gear box (6) is drivingly connected to the driven wheel (4); the transmission shaft (7) is drivingly connected between the driving gear box (5) and the driven gear box (6); the transmission shaft (7) is located at a position lower than the center position of the driving wheel (3) and the driven wheel (4); The motor (2) is drivingly connected to the driving gear box (5).

2. A bogie suitable for a low floor according to claim 1, characterized in that: The upper surfaces of the driving gear box (5) and the driven gear box (6) are both provided with secondary spring mounting seats (8).

3. A bogie suitable for a low floor according to claim 1, characterized in that: The driving gearbox (5) is located on the inner side of the driving wheel (3), and the driven gearbox (6) is located on the inner side of the driven wheel (4); the driving wheel (3) is located on the outer side of the frame (1), and the driven wheel (4) is also located on the outer side of the frame (1).

4. The bogie suitable for low-floor according to claim 1, characterized in that: The bogie comprises two driving wheels (3), two driven wheels (4), two driving gear boxes (5), two driven gear boxes (6) and two motors (2), and each motor (2) is respectively connected to one driving gear box (5) by transmission.

5. A bogie suitable for a low floor according to claim 4, characterized in that: The two motors (2) are distributed along the diagonal lines of the frame (1).

6. The bogie suitable for low-floor according to claim 1, characterized in that: The motor (2) is installed under the vehicle body, and the motor (2) is connected to the driving gear box (5) via a coupling (9).

7. A bogie suitable for a low floor according to claim 6, characterized in that: The motor (2) is located outside the driving wheel (3).

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