Body suspension type power parallel driving device, bogie and railway vehicle

Abstract

The invention provides a body suspension type power parallel driving device, a bogie and a railway vehicle. The body suspension type power parallel driving device comprises a traction motor, a traction rod and a first gear box used for transmitting traction force and braking force and distributing traction power, and the first gear box comprises a power input end, a first power output end, a second power output end and a traction output end. A motor shaft of the traction motor is connected with the power input end, the first power output end is connected with a second gearbox through a first shaft end universal joint, the second power output end is connected with a third gearbox through a second shaft end universal joint, one end of the traction rod is connected with the traction output end, and the other end of the traction rod is connected with the traction motor. And the other end of the traction rod is connected with a first traction seat. The traction motor is installed on the frame, the mode that one traction motor drives the wheel sets on the two sides in parallel is achieved, the production cost can be reduced, the vehicle weight can be reduced, and the secondary unsprung weight of the bogie can also be reduced.

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] At present, the body-suspended power parallel drive device for rail vehicles often adopts rigid axle suspension, elastic axle suspension, and frame suspension drive unit installation methods. The motor of the body-suspended power parallel drive device is often supported on the axle or frame. Among them, the frame-suspended and axle-suspended drive units have the problem of large unsprung mass. The large unsprung mass will increase the force between the wheel and the rail, accelerating the wear of the wheel and rail.

[0003] The traction motor in the body-suspended parallel power drive is installed on the car body, making it a mass above the secondary spring, reducing the mass and rotational inertia moment of the bogie frame, maintaining the serpentine stability of the bogie at high speed, and also helping to reduce the vertical and lateral dynamic loads of the wheel and rail. When the operating speed of the high-speed locomotive exceeds 200~250km / h, in order to reduce the mass of the bogie frame and improve the serpentine stability of the bogie, the traction motor is moved to the car body, becoming a body suspension method. The layout structure of the body suspension method has high space requirements, and other auxiliary components of the body-suspended parallel power drive device need to be optimized. It has not yet been promoted. 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 wheels on both sides at the same time, which is conducive to the suspension of the traction motor body, which can not only reduce the production cost 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 by 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 gear box.

[0009] Preferably, two traction rods are relatively arranged, each of the traction rods is connected to the first traction seat, and the extension 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 arc shape that bends upward.

[0012] The present invention also provides a bogie, comprising a frame, a first wheel pair and a second wheel pair respectively arranged in front and behind the frame, and the above-mentioned body-suspended power parallel drive device, the second gear box of the body-suspended power parallel drive device is installed on the frame and is drivingly connected to the first wheel pair, the third gear box is installed on the frame and is drivingly connected to the second wheel pair, and the end of the first traction seat away from the traction rod is installed 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 gear box 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: 1. The traction motor 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 the traction motor can be installed on the frame and realize a mode of driving the wheelsets on both sides in parallel. This can not only reduce the production cost and vehicle weight, but also reduce the weight of the secondary unsprung bogie; Second, the first gearbox integrates traction and power, which not only outputs traction and wheelset driving force, but also serves to connect the frame and the bogie, thus playing the role of bogie traction. In addition, it simplifies components, reduces production costs and reduces vehicle weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a body-suspended power parallel drive device provided by the present invention with a wheelset installed; Figure 2 is a partially enlarged schematic diagram of the mounting structure of the first gear box; Figure 3 is a schematic diagram of the bottom connection of the first gear box; Figure 4 It is a schematic diagram of the connection structure of the coupling and the transmission universal joint; Figure 5 A schematic diagram of the structure of a bogie provided by the present invention; Figure 6 for Figure 5 A half-section diagram of Figure 7 It is a schematic diagram of the connection structure of the first gearbox, the second shaft end universal joint, the third gearbox and the second wheel pair.

[0016] 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 gear box; 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 gear box; 18. third gear box; 19. first suspension rod; 20. second suspension rod; 21. second traction seat; 22. traction rod. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0018] like Figure 1 As shown, a body-suspended power parallel drive device 1 provided in this embodiment includes a first mounting seat 3, a second mounting seat 4, a first hanging seat 5, a second hanging seat 6, a first traction seat 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 suspension rod 19, a second suspension rod 20 and a traction rod 22.

[0019] The upper end of the traction motor 11 is connected to the first mounting seat 3 by bolts, and the first mounting seat 3 is used to be connected to the vehicle frame.

[0020] 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 travels in the front direction and the vehicle travels in the rear direction). Figure 2 , Figure 4 As shown, the motor shaft of the traction motor 11 is connected to the coupling 12, and the coupling 12 is connected to the transmission universal joint 13 through the spline 8. The transmission universal joint 13 can better use the relative displacement of the traction motor 11 and the first gear box 14 under different working conditions. The transmission universal joint 13 is connected to the power input end 141 on the first gear box 14 through fasteners arranged in the circumferential direction. A second mounting seat 4 is provided on the top of the first gear box 14, and the second mounting seat 4 is used to be connected to the frame.

[0021] like Figure 2 As shown, the first power output end 142 is connected to the second gearbox 17 through 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 through 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 be connected to the frame. The first suspension rod 19 and the second suspension rod 20 are both arc-shaped and curved upward.

[0022] like Figure 3 As shown, the first gearbox 14 includes a gearbox body and a second traction seat 21 installed at the bottom of the gearbox body by bolts, and the second traction seat 21 forms a 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.

[0023] Two traction rods 22 are connected to the second traction seat 21. The two traction rods 22 are arranged one on the left and one on the right. One traction rod 22 extends forward and the other traction rod 22 extends backward. The other end of each traction rod 22 is connected to the first traction seat 7. The first traction seat 7 is used to connect with the frame, and the second mounting seat 4 on the top of the first gear box 14 is used to connect with the frame, thereby connecting the frame with the frame to complete the transmission of traction and braking force between the frame and the bogie.

[0024] 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 at the 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 drivingly connected to the first wheel pair 9, and the third gear box 18 is installed on the frame 2 and is drivingly connected to the second wheel pair 10 (as shown in FIG. Figure 7 As shown in FIG. 2 , 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 the corresponding positions of the frame 2.

[0025] The transmission order of traction power on the bogie is: traction motor 11→coupling 12→drive universal joint 13→first gear box 14→first shaft end universal joint 15 and second shaft end universal joint 16→second gear box 17 and third gear box 18→first wheel set 9 and second wheel set 10. By driving the wheel sets on both sides in parallel with one traction motor 11, the structure is more compact and the vehicle weight is reduced.

[0026] 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 11 in each of the bogies is connected to the frame through a first mounting seat 3, and the upper end of the first gear box 14 in each of the bogies is connected to the frame through a second mounting seat 4. The extension direction of the traction rod 22 is consistent with the forward direction of the frame. In the rail vehicle, the traction motor 11 is installed on the frame to form a body-suspended motor installation method, which can reduce the weight of the bogie's secondary unsprung weight. Each bogie is equipped with a traction motor 11.

[0027] 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 specification 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 parallel power drive device, comprising a traction motor (11), characterized in that: It also comprises a traction rod (22) and a first gearbox (14) for transmitting traction force, braking force and traction power distribution, wherein the first gearbox (14) comprises 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) via a first shaft end universal joint (15), the second power output end (143) of the first gearbox is connected to the third gearbox (18) via 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 a 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 at 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 comprises a first mount (5), a first suspension rod (19), a second mount (6) and a second suspension rod (20), wherein the first suspension rod (19) is connected to the second gear box (17) and the first mount (5), and the second suspension rod (20) is connected to the third gear box (18) and the second mount (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 at the front and rear of 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 drivingly connected to the first wheel pair (9), the third gear box (18) is mounted on the frame (2) and is drivingly 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 being connected to the frame via a first mounting seat (3), and the upper end of the first gear box (14) in each of the bogies being connected to the frame via a second mounting seat (4).

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