A body-suspended power parallel drive device, bogie and rail vehicle

Abstract

The present invention provides a body-suspended parallel power drive device, a bogie, and a rail vehicle. The body-suspended parallel power drive device includes a traction motor, a traction rod, and a first gearbox for transmitting traction force, braking force, and traction power distribution. The first gearbox includes a power input end, a first power output end, a second power output end, and a traction output end. The motor shaft of the traction motor is connected to the power input end. The first power output end is connected to the second gearbox via a first shaft end universal joint. The second power output end is connected to the third gearbox via a second shaft end universal joint. One end of the traction rod is connected to the traction output end, and the other end of the traction rod is connected to the first traction seat. The traction motor of the present invention is installed on the vehicle frame, realizing a method of driving two wheel pairs in parallel by one motor. This can not only reduce production costs and vehicle weight, but also reduce the secondary unsprung weight of the bogie.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit vehicles, and in particular to a body-suspended power parallel drive device, a bogie and a rail vehicle. Background Art

[0002] Currently, body-mounted parallel drive systems for rail vehicles often utilize rigid axle suspension, elastic axle suspension, or frame suspension for the drive unit installation. The motor of a body-mounted parallel drive system is often supported on the axle or frame. Frame- and axle-mounted drive units suffer from high unsprung mass, which increases the forces between the wheels and rails, accelerating wheel and rail wear.

[0003] In a body-suspension type of parallel-drive system, the traction motor is mounted on the carbody, making it a mass that acts as more than a secondary spring. This reduces the mass and rotational inertia of the bogie frame, maintaining the bogie's serpentine stability at high speeds and helping to reduce vertical and lateral dynamic loads on the wheel and rail. For high-speed locomotives operating at speeds exceeding 200-250 km / h, the traction motor is moved to the carbody, resulting in a body-suspension system. However, this type of system requires high space requirements and optimization of other ancillary components of the body-suspension parallel-drive system. Therefore, it has not yet been widely adopted. Summary of the Invention

[0004] The object of the present invention is to provide a body-suspended power parallel drive device, a bogie and a rail vehicle, and to optimize the layout structure of the body-suspended power parallel drive device so as to realize the body-suspended layout of the traction motor.

[0005] The technical solution of the present invention is: a body-suspended power parallel drive device, including a traction motor, a traction rod and a first gearbox for transmitting traction force, braking force and traction power distribution, the first gearbox including a power input end, a first power output end, a second power output end and a traction output end, the motor shaft of the traction motor is connected to the power input end, the first power output end is connected to the second gearbox through a first shaft end universal joint, the second power output end of the first gearbox is connected to the third gearbox through a second shaft end universal joint, one end of the traction rod is connected to the traction output end, and the other end of the traction rod is connected to a first traction seat for connecting to a bogie.

[0006] In the above scheme, the first gearbox is connected in parallel with two shaft-end gearboxes (the second gearbox and the third gearbox) to realize a multi-stage transmission mode, so that one traction motor can drive the wheelsets on both sides simultaneously. This is conducive to the suspension of the traction motor body, which can not only reduce production costs and vehicle weight, but also reduce the secondary unsprung weight of the bogie.

[0007] Preferably, the body-suspended power parallel drive device also includes a coupling and a transmission universal joint connected to the coupling through a spline, the end of the coupling away from the transmission universal joint is connected to the motor shaft of the traction motor, and the end of the transmission universal joint away from the coupling is connected to the power input end.

[0008] Preferably, the first power output end and the second power output end are respectively arranged at the front and rear sides of the first gearbox.

[0009] Preferably, two traction rods are relatively provided, each of the traction rods is connected to the first traction seat, and the extending direction of the traction rod is consistent with the distribution direction of the first power output end and the second power output end.

[0010] Preferably, the body-suspended power parallel drive device also includes a first mount, a first suspension rod, a second mount and a second suspension rod, the first suspension rod is connected to the second gear box and the first mount, and the second suspension rod is connected to the third gear box and the second mount.

[0011] Preferably, the first suspension rod and the second suspension rod are both in an upwardly curved arc shape.

[0012] The present invention also provides a bogie, comprising a frame, a first wheelset and a second wheelset respectively arranged in front and rear of the frame, and the above-mentioned body-suspended power parallel drive device, the second gearbox of the body-suspended power parallel drive device being mounted on the frame and drivingly connected to the first wheelset, the third gearbox being mounted on the frame and drivingly connected to the second wheelset, and the end of the first traction seat away from the traction rod being mounted on the frame.

[0013] The present invention also provides a rail vehicle, comprising a frame and a plurality of the above-mentioned bogies connected to the lower end of the frame, the upper end of the traction motor in each of the bogies being connected to the frame via a first mounting seat, and the upper end of the first gearbox in each of the bogies being connected to the frame via a second mounting seat.

[0014] Compared with the related art, the present invention has the following beneficial effects:

[0015] First, the traction motor is connected in parallel to two shaft-end gearboxes (the second gearbox and the third gearbox) to achieve a multi-stage transmission mode. This allows the traction motor to be installed on the vehicle frame, and one motor drives both wheels in parallel. This not only reduces production costs and vehicle weight, but also reduces the secondary unsprung weight of the bogie.

[0016] Second, the first gearbox integrates traction and power, not only outputting traction and wheelset driving force, but also connecting the frame and bogie, thus fulfilling the bogie traction function; in addition, it simplifies components, reduces production costs and reduces vehicle weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a body-suspended power parallel drive device provided by the present invention, equipped with a wheelset;

[0018] Figure 2 is a partially enlarged schematic diagram of the mounting structure of the first gearbox;

[0019] Figure 3 Schematic diagram of the bottom connection of the first gearbox;

[0020] Figure 4 Schematic diagram of the connection structure of the coupling and the transmission universal joint;

[0021] Figure 5 A schematic structural diagram of a bogie provided by the present invention;

[0022] Figure 6 for Figure 5 A half-section diagram of

[0023] Figure 7 This is a schematic diagram of the connection structure of the first gearbox, the second shaft end universal joint, the third gearbox and the second wheelset.

[0024] In the accompanying drawings: 1. Body-suspended power parallel drive device; 2. Frame; 3. First mounting seat; 4. Second mounting seat; 5. First hanging seat; 6. Second hanging seat; 7. First traction seat; 8. Spline; 9. First wheel pair; 10. Second wheel pair; 11. Traction motor; 12. Coupling; 13. Transmission universal joint; 14. First gearbox; 141. Power input end; 142. First power output end; 143. Second power output end; 144. Traction output end; 15. First shaft end universal joint; 16. Second shaft end universal joint; 17. Second gearbox; 18. Third gearbox; 19. First boom; 20. Second boom; 21. Second traction seat; 22. Traction rod. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0026] like Figure 1As shown, the present embodiment provides a body-suspended power parallel drive device 1 including a first mounting base 3, a second mounting base 4, a first hanging base 5, a second hanging base 6, a first traction base 7, a spline 8, a traction motor 11, a coupling 12, a transmission universal joint 13, a first gear box 14, a first shaft end universal joint 15, a second shaft end universal joint 16, a second gear box 17, a third gear box 18, a first boom 19, a second boom 20 and a traction rod 22.

[0027] The upper end of the traction motor 11 is connected to the first mounting base 3 via bolts, and the first mounting base 3 is used to be connected to the vehicle frame.

[0028] like Figure 2 As shown, the first gearbox 14 includes a power input end 141, a first power output end 142, a second power output end 143, and a traction output end 144. The motor shaft of the traction motor 11 is connected to the power input end 141 through a coupling 12 and a transmission universal joint 13. The first power output end 142 and the second power output end 143 are respectively arranged at the front and rear sides of the first gearbox 14 (the vehicle is traveling in the front direction and the reverse direction is the rear direction). Figure 2 、 Figure 4 As shown, the motor shaft of the traction motor 11 is connected to a coupling 12, which is connected to a transmission universal joint 13 via a spline 8. This transmission universal joint 13 can better utilize the relative displacement between the traction motor 11 and the first gearbox 14 under different operating conditions. The transmission universal joint 13 is connected to the power input port 141 of the first gearbox 14 via circumferentially arranged fasteners. The top of the first gearbox 14 is provided with a second mounting base 4, which is used to connect to the vehicle frame.

[0029] like Figure 2 As shown, the first power output end 142 is connected to the second gearbox 17 via the first shaft end universal joint 15, and the first suspension rod 19 connects the second gearbox 17 and the first mount 5. The second power output end 143 is connected to the third gearbox 18 via the second shaft end universal joint 16, and the second suspension rod 20 connects the third gearbox 18 and the second mount 6. The first mount 5 and the second mount 6 are used to connect to the frame. The first suspension rod 19 and the second suspension rod 20 are both upwardly curved.

[0030] like Figure 3 As shown, the first gearbox 14 includes a gearbox body and a second traction seat 21 mounted on the bottom of the gearbox body by bolts. The second traction seat 21 forms the traction output end 144 of the first gearbox 14. The power output end 141, the first power output end 142, and the second power output end 143 are all formed by a gear set inside the gearbox body.

[0031] Two traction rods 22 are connected to the second traction seat 21. These two traction rods 22 are arranged one on the left and one on the right, with one traction rod 22 extending forward and the other extending backward. The other end of each traction rod 22 is connected to the first traction seat 7. The first traction seat 7 is connected to the frame. The second mounting bracket 4 on top of the first gearbox 14 is connected to the vehicle frame, thereby connecting the vehicle frame to the frame and transmitting traction and braking forces between the frame and the bogie.

[0032] like Figure 5 、 Figure 6 As shown, the present invention also provides a bogie, which includes a frame 2, a first wheel pair 9 and a second wheel pair 10 respectively arranged in front and rear of the frame 2, and the above-mentioned body-suspended power parallel drive device 1, the second gear box 17 of the body-suspended power parallel drive device 1 is installed on the frame 2 and is driven and connected to the first wheel pair 9, and the third gear box 18 is installed on the frame 2 and is driven and connected to the second wheel pair 10 (as shown in FIG. Figure 7 As shown in FIG, one end of the first traction seat 7 away from the traction rod 22 is mounted on the frame 2. The first hanging seat 5 and the second hanging seat 6 are mounted on corresponding positions of the frame 2.

[0033] The order of traction power transmission on the bogie is: traction motor 11 → coupling 12 → transmission universal joint 13 → first gearbox 14 → first shaft end universal joint 15 and second shaft end universal joint 16 → second gearbox 17 and third gearbox 18 → first wheelset 9 and second wheelset 10. By driving both wheelsets in parallel with a single traction motor 11, the structure is more compact and the vehicle weight is reduced.

[0034] The present invention also provides a rail vehicle comprising a vehicle frame and a plurality of bogies described above connected to the lower end of the vehicle frame. The upper end of the traction motor 11 in each bogie is connected to the vehicle frame via a first mounting bracket 3, and the upper end of the first gearbox 14 in each bogie is connected to the vehicle frame via a second mounting bracket 4. The traction rod 22 extends in the same direction as the vehicle frame's forward motion. In this rail vehicle, the traction motor 11 is mounted on the vehicle frame, forming a body-mounted motor installation method that reduces the secondary unsprung weight of the bogie. Each bogie is equipped with one traction motor 11.

[0035] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A body-suspended power parallel drive device, comprising a traction motor (11), characterized in that: The invention also includes a traction rod (22) and a first gearbox (14) for transmitting traction force, braking force and traction power distribution, wherein the first gearbox (14) includes a power input end (141), a first power output end (142), a second power output end (143) and a traction output end (144), the motor shaft of the traction motor (11) is connected to the power input end (141), the first power output end (142) is connected to the second gearbox (17) through a first shaft end universal joint (15), and the second power output end (143) of the first gearbox is connected to the third gearbox (18) through a second shaft end universal joint (16), one end of the traction rod (22) is connected to the traction output end (144), and the other end of the traction rod (22) is connected to a first traction seat (7) for connecting to a bogie.

2. The body-suspended parallel power drive device according to claim 1, characterized in that: It also includes a coupling (12) and a transmission universal joint (13) connected to the coupling (12) via a spline (8), wherein one end of the coupling (12) away from the transmission universal joint (13) is connected to the motor shaft of the traction motor (11), and one end of the transmission universal joint (13) away from the coupling (12) is connected to the power input end (141).

3. The body-suspended parallel power drive device according to claim 1, characterized in that: The first power output end (142) and the second power output end (143) are respectively arranged on the front and rear sides of the first gear box (14).

4. The body-suspended parallel power drive device according to claim 3, characterized in that: Two traction rods (22) are arranged opposite to each other, each traction rod (22) is connected to the first traction seat (7), and the extension direction of the traction rod (22) is consistent with the distribution direction of the first power output end (142) and the second power output end (143).

5. The body-suspended parallel power drive device according to claim 1, characterized in that: It also includes a first hanger (5), a first suspension rod (19), a second hanger (6) and a second suspension rod (20), wherein the first suspension rod (19) is connected to the second gear box (17) and the first hanger (5), and the second suspension rod (20) is connected to the third gear box (18) and the second hanger (6).

6. The body-suspended parallel power drive device according to claim 5, characterized in that: The first suspension rod (19) and the second suspension rod (20) are both in an upwardly curved arc shape.

7. A bogie comprising a frame (2) and a first wheel pair (9) and a second wheel pair (10) respectively arranged in front and behind the frame (2), characterized in that: It also includes a body-suspended power parallel drive device as described in any one of claims 1 to 6, wherein the second gear box (17) of the body-suspended power parallel drive device is mounted on the frame (2) and is drive-connected to the first wheel pair (9), the third gear box (18) is mounted on the frame (2) and is drive-connected to the second wheel pair (10), and the end of the first traction seat (7) away from the traction rod (22) is mounted on the frame (2).

8. A rail vehicle comprising a frame, characterized in that: It also includes a plurality of bogies as claimed in claim 7 connected to the lower end of the frame, the upper end of the traction motor (11) in each of the bogies is connected to the frame through a first mounting seat (3), and the upper end of the first gearbox (14) in each of the bogies is connected to the frame through a second mounting seat (4).

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