Traction device of railway vehicle

Abstract

Disclosed in the present invention is a traction device of a railway vehicle. The traction device comprises a first link, a second link, a suspension rod, triangular rotating arms and a connecting rod, wherein the two triangular rotating arms are symmetrically arranged about a longitudinal center line of a framework; one end of the second link is hinged to a first corner of the triangular rotating arm, a second corner of the triangular rotating arm is hinged to the framework, and two ends of the connecting rod are hinged to third corners of the two triangular rotating arms, respectively; the other end of the second link is hinged to one end of the first link, and the other end of the first link is hinged to a vehicle body traction base; the other end of the second link is further hinged to a lower end of the suspension rod, and an upper end of the suspension rod is hinged to the framework; and the first link, the second link and the suspension rod are all distributed on an outer side of an electric motor of a bogie, and the first link is obliquely arranged with respect to railways on which a railway vehicle runs. In the present invention, the traction device is arranged on either side of the framework of the bogie and is not limited by the size of a traction electric motor of the bogie; and moreover, the inclined first link is added, thereby increasing the adhesion utilization rate of the bogie.

Description

Traction device for rail vehicle Technical Field

[0001] The present invention relates to a traction device for a rail vehicle, in particular to a traction device for connecting a bogie and a vehicle body, and belongs to the technical field of traction devices for rail vehicles. Background Art

[0002] High-speed, heavy-haul rail transportation has developed rapidly in my country in recent years. Domestic rail freight transports the majority of the nation's bulk commodities, including coal, ore, steel, grain, and oil, and is a vital artery for the nation's economic development. The trend toward high-speed, heavy-haul rail freight transportation necessitates high-power electric locomotives to provide the necessary power and reduce axle load transfer, thereby improving locomotive adhesion utilization and ensuring sufficient traction to meet the demands of heavy-load, high-speed operation. Traction motors, the power source of electric locomotives, must be increased in size to provide greater power. Furthermore, the use of permanent magnet direct-drive motors requires a larger footprint to deliver high power. This larger footprint limits the design of centrally located traction units.

[0003] Patent Document 1 (publication number CN100484816C) discloses a combined locomotive traction device. Its bogies all utilize a central traction rod, eliminating the need for a traction seat on the vehicle body frame. This also facilitates the use of a central longitudinal beam structure on the vehicle body frame, resulting in smoother force transmission and improved vehicle load-bearing capacity. However, as the power of the traction motor increases, the increased size of the traction motor may interfere with the central traction rod.

[0004] Summary of the Invention

[0005] To meet the demand for high-power traction, large motors occupy the space in the transverse center of the bogie, making it impossible to install the traction device in the center of the bogie. The present invention provides a traction device for rail vehicles that addresses the problem of insufficient space below the high-power bogie motor. It also reduces the height of the traction point, effectively reducing axle load transfer, improving the locomotive's adhesion utilization, and providing sufficient traction power for high-power electric locomotives. The specific technical solution is as follows.

[0006] A traction device for a rail vehicle, characterized in that it comprises a first connecting rod, a second connecting rod, a boom, a triangular rotatable arm, and a connecting rod; the two triangular rotatable arms are symmetrically arranged along the longitudinal center line of a frame, one end of the second connecting rod is hinged to a first corner of the triangular rotatable arm, the second corner of the triangular rotatable arm is hinged to the frame, and both ends of the connecting rod are respectively hinged to the third corners of the two triangular rotatable arms;

[0007] The other end of the second connecting rod is hinged to one end of the first connecting rod, and the other end of the first connecting rod is hinged to the vehicle body traction seat;

[0008] The other end of the second connecting rod is also hinged to the lower end of the suspension rod, and the upper end of the suspension rod is hinged to the frame;

[0009] The first connecting rod, the second connecting rod and the suspension rod are all distributed on the outside of the motor of the bogie, and the first connecting rod is arranged to be inclined relative to the track on which the rail vehicle runs.

[0010] By adopting the above technical solution, the first connecting rod, the second connecting rod and the suspension rod of the traction device are arranged on both sides of the bogie frame (outside of the motor), which is not limited by the size of the bogie traction motor; at the same time, an inclined first connecting rod is added, and the distance from the intersection of the extended line of its center line and the center in the longitudinal direction of the bogie to the rail surface is the traction point height. While taking into account the wear of the wheel rim, the traction point height is reduced as much as possible, thereby improving the adhesion utilization rate of the bogie.

[0011] Furthermore, one end of the first connecting rod hinged to the vehicle body traction seat is provided with a rubber joint, so as to compensate for vertical and longitudinal deviations when the vehicle body and the bogie frame are assembled.

[0012] Furthermore, one end of the second link hinged to the first link is provided with a boom mount having a groove. Holes at the upper and lower ends of the boom contain boom rubber joints, with the pivot axis of the boom rubber joint extending toward the center of the bogie. The grooves accommodate the boom end, and defining the pivot axis direction of the boom rubber joint helps the boom adapt to the yaw of the traction device when the bogie negotiates a curve.

[0013] Furthermore, a radial spherical bearing is provided at the first corner of the triangular swivel arm, and the second connecting rod is connected to the triangular swivel arm via the radial spherical bearing. The radial spherical bearing enables the second connecting rod to adapt to the movement of the bogie when turning.

[0014] Furthermore, a swivel arm mounting seat is provided on the frame, and the swivel arm mounting seat includes an upper mounting seat and a lower mounting seat, and both the upper mounting seat and the lower mounting seat are provided with bushings, wherein the lower mounting seat is also provided with a stop to prevent the bushing from falling off downward; the second corner of the triangular swivel arm is hinged to the swivel arm mounting seat.

[0015] Compared with the prior art, the present invention offers the following advantages: The traction device is arranged on both sides of the bogie frame, unrestricted by the size of the bogie's traction motor; a tilted first link is added, and the distance from the intersection of its centerline extension and the bogie center to the rail surface is the traction point height. This reduces the traction point height as much as possible while taking into account wheel rim wear, thereby improving the bogie's adhesion utilization rate; a hanger is provided at the hinge point of the first and second links, with the extension of the hanger rubber joint's rotating axis directed toward the center of the bogie to reduce the deflection and torsion angle of the hanger rubber joint and accommodate the yaw of the traction device when the bogie negotiates a curve; a rubber joint is used in the inner hole of the connection between the first link and the carbody traction seat to compensate for vertical and longitudinal deviations during assembly of the carbody and bogie frame. Other hinged connections, such as the hinge point between the first and second links, the hinge point between the triangular swivel arm and the connecting rod, and the intersection point between the triangular swivel arm and the swivel arm mounting seat, utilize pin and sleeve connections, facilitating flexible rotation and low resistance at all locations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a front view of a traction device of the present invention;

[0017] FIG2 is a top view of the traction device of the present invention;

[0018] FIG3 is a schematic diagram of a first connecting rod;

[0019] FIG4 is a schematic diagram of a second connecting rod;

[0020] Figure 5 is a schematic diagram of the boom;

[0021] FIG6 is a schematic diagram of a triangular rotating arm;

[0022] FIG7 is a schematic diagram of a connecting rod;

[0023] FIG8 is a schematic diagram of a rotating arm mounting base;

[0024] Figure 9 is a schematic diagram of AA in Figure 1;

[0025] Figure 10 is a schematic diagram of BB in Figure 2;

[0026] Figure 11 is a schematic diagram of the CC in Figure 1;

[0027] Figure 12 is a schematic diagram of the DD in Figure 1;

[0028] In the figure: first connecting rod 1, first rod body 1.1, rubber joint 1.2, second connecting rod 2, second rod body 2.1, boom mounting seat 2.2, groove 2.3, boom 3, boom rubber joint 3.1, rotating shaft 3.2, triangular swing arm 4, first angle 4.1, second angle 4.2, third angle 4.3, centripetal spherical bearing 4.4, connecting rod 5, connecting rod body 5.1, vehicle body traction seat 6, frame 7, bushing 8, swing arm mounting seat 9, upper mounting seat 9.1, lower mounting seat 9.2, stop 9.3, pin 10, cover plate 11, fastener 12, vehicle body 13, pad 14, motor 15. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the accompanying drawings.

[0030] Referring to Figures 1 to 12, the traction device of the rail vehicle includes a first connecting rod 1, a second connecting rod 2, a boom 3, a triangular rotatable arm 4, and a connecting rod 5. The two triangular rotatable arms 4 are symmetrically arranged along the longitudinal centerline of the frame. One end of the second connecting rod 2 is hinged to a first corner 4.1 of the triangular rotatable arm 4, and a second corner 4.2 of the triangular rotatable arm 4 is hinged to the frame 7. The ends of the connecting rod 5 are respectively hinged to the third corners 4.3 of the two triangular rotatable arms 4.

[0031] The other end of the second connecting rod 2 is hinged to one end of the first connecting rod 1, and the other end of the first connecting rod 1 is hinged to the vehicle body traction seat 6;

[0032] The other end of the second connecting rod 2 is also hinged to the lower end of the suspension rod 3, and the upper end of the suspension rod 3 is hinged to the frame 7;

[0033] The first connecting rod 1, the second connecting rod 2 and the suspension rod 3 are all distributed outside the motor 15 of the bogie. The first connecting rod 1 is tilted relative to the track on which the rail vehicle runs, and the second connecting rod 2 is horizontally arranged.

[0034] As shown in Figures 1 and 3, the first connecting rod 1 includes a first rod body 1.1, a rubber joint 1.2 and a bushing 8. One end of the first connecting rod 1 is connected to the vehicle body traction seat 6, and the other end is connected to the second connecting rod 2; the rubber joint 1.2 is interference fitted into the hole of the first connecting rod 1.1, and its function is to compensate for the vertical and longitudinal deviations when the vehicle body and the bogie frame are assembled.

[0035] As shown in Figures 1 and 4, the second link 2 includes a second rod body 2.1, a boom mounting seat 2.2 and a bushing 8. The end of the second link 2 hinged to the first link 1 is provided with a boom mounting seat 2.2, and the boom 3 mounting seat has a groove 2.3; as shown in Figures 2 and 4, a boom rubber joint 3.1 is provided in the holes at the upper and lower ends of the boom 3, and the extension direction of the rotating shaft 3.2 of the boom rubber joint 3.1 points to the center of the bogie (here refers to the extension of the horizontal and longitudinal center of the bogie in the vertical direction). The groove 2.3 is to accommodate the end of the boom 3. Limiting the direction of the rotating shaft 3.2 of the boom rubber joint 3.1 is beneficial for the boom 3 to adapt to the deflection of the traction device when the bogie passes through a curve. When the vehicle passes through the curve and the bogie and the vehicle body turn an angle, the deflection angle and torsion angle of the boom rubber joint 3.1 are minimized, which is more beneficial to the design parameter margin of the boom rubber joint 3.1, and there is no need to adjust the size or use a joint that allows a larger deflection angle.

[0036] Hanger 3 ensures structural force balance. Without it, when the traction mechanism is subjected to force, the first and second links 1 and 2 would rotate via pin 10, causing imbalance. Hanger 3 facilitates the transmission of longitudinal traction and braking forces through the first and second links 1 and 2, and controls the position and orientation of the first link 1. This ensures that the intersection of the extended centerline of the first link 1 and the centerline of the frame is sufficiently low, improving the vehicle's adhesion utilization. As shown in Figure 6, the first corner 4.1 of the triangular swivel arm 4 is equipped with a radial spherical bearing 4.4, through which the second link is connected to the triangular swivel arm 4. Bushings 8 are provided at the third corner 4.3 and the second corner 4.2 of the triangular swivel arm 4. The radial spherical bearings enable the second link 2 to adapt to the movement of the bogie during cornering.

[0037] The triangular jib 4 functions as a force transmission structure, transmitting both sides of the vehicle body's force applied to the parallel structure formed by the first link 1, second link 2, and connecting rod 5, as well as the force applied by the vehicle body to the bogie 7. The second corner 4.2 of the triangular jib 4 is connected to the bogie 7 via a pin 10 and the jib mounting base 9 for force transmission. The third corner 4.3 is connected to the connecting rod 5 via a pin 10 for force transmission. The first corner 4.1 is connected to the second link 2 via a pin 10 for force transmission. By connecting the second link 2 and connecting rod 5 on both sides of the bogie 7, the two triangular jibs 4 achieve a parallel structure coupling effect, transmitting the dynamic forces between the vehicle body and the bogie.

[0038] As shown in FIG. 2 and FIG. 7 , the connecting rod 5 includes a connecting rod body 5.1 and a bushing 8. The connecting rod body 5.1 is a symmetrical structure, with both ends connected to the third triangle 4.3 of the triangular rotating arm 4 respectively.

[0039] As shown in Figures 1 and 8, a swivel arm mounting seat 9 is provided on the frame 7, and the swivel arm mounting seat 9 includes an upper mounting seat 9.1 and a lower mounting seat 9.2. Both the upper mounting seat 9.1 and the lower mounting seat 9.2 are provided with a bushing 8, wherein the lower mounting seat 9.2 is also provided with a stop 9.3 to prevent the bushing 8 from falling off downward; the second corner 4.2 of the triangular swivel arm 4 is hinged to the swivel arm mounting seat 9.

[0040] The assembly method of the traction device of the present invention is as follows: first, the upper end of the boom 3 is connected to the frame 7 through fasteners, and the lower end is in a free state. According to the AA view, the swing arm mounting seat 9 is connected to the second corner 4.2 of the triangular swing arm 4 through the pin 10, the cover plate 11, and the fastener 12, and then the swing arm mounting seat 9 is connected to the frame 7 as a whole through the fasteners. Due to space reasons, during assembly, the second corner 4.2 of the triangular swing arm 4 must be connected to the swing arm mounting seat 9 first and then connected to the frame 7 as a whole. According to the BB view, the two ends of the connecting rod 5 are respectively connected to the third corner 4.3 of the triangular swing arm 4 through the pin 10 and the fastener 12. According to the AA view, the second connecting rod 2 is connected to the first corner 4.1 of the triangular swing arm 4 through the pin 10, the cover plate 11, and the fastener 12. According to the DD view, the first connecting rod 1 is first connected to the second connecting rod 2 through the pin 10, the cover plate 11, and the fastener 12; then the second connecting rod 2 is connected to the lower end of the boom 3 through the fastener. According to the CC view, the car body traction seat 6 is first connected to the car body 13 through fasteners, and then the car body traction seat 6 is connected to the first connecting rod 1 through the pad 14 and fasteners 12. The rubber joint 1.2 used at this end of the first connecting rod 1 can compensate for the vertical and longitudinal deviations when the car body 13 and the bogie frame 7 are assembled.

[0041] Through the above structure, a low-position double-sided pull-rod traction device is completed, which satisfies the connection between the car body 13 and the bogie frame 7 on both sides, and solves the problem that the traction motor is too large to be arranged in the center. At the same time, the inclined first connecting rod 1 is used to lower the traction point height of the traction device, reduce the axle load transfer, improve the adhesion utilization rate of the locomotive, and meet the traction power requirements of high-power locomotives.

[0042] The embodiments of the present invention are described above in conjunction with the accompanying drawings. The embodiments of the present invention and the features thereof may be combined with each other unless there is any conflict. The present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Under the guidance of the present invention, those skilled in the art may devise various forms without departing from the spirit of the present invention and the scope of protection of the claims. All of these forms fall within the scope of protection of the present invention.

Claims

1. A traction device for a rail vehicle, characterized in that: It comprises a first connecting rod (1), a second connecting rod (2), a suspension rod (3), a triangular rotating arm (4) and a connecting rod (5); the two triangular rotating arms (4) are symmetrically arranged along the longitudinal center line of the frame (7); one end of the second connecting rod (2) is hinged to the first corner (4.1) of the triangular rotating arm (4); the second corner (4.2) of the triangular rotating arm (4) is hinged to the frame (7); and the two ends of the connecting rod (5) are respectively hinged to the third corners (4.3) of the two triangular rotating arms (4); The other end of the second connecting rod (5) is hinged to one end of the first connecting rod (1), and the other end of the first connecting rod (1) is hinged to the vehicle body traction seat (6); The other end of the second connecting rod (5) is also hinged to the lower end of the suspension rod (3), and the upper end of the suspension rod (3) is hinged to the frame (7); The first connecting rod (1), the second connecting rod (2) and the suspension rod (3) are all distributed on the outside of the motor (15) of the bogie, and the first connecting rod (1) is arranged to be inclined relative to the track on which the rail vehicle runs.

2. A traction device for a rail vehicle according to claim 1, characterized in that: One end of the first connecting rod (1) which is hinged to the vehicle body traction seat (6) is provided with a rubber joint (1.2).

3. A traction device for a rail vehicle according to claim 1, characterized in that: A boom mounting seat (2.2) is provided at one end of the second connecting rod (2) hinged to the first connecting rod (1), and the boom mounting seat (2.2) has a groove (2.3); boom rubber joints (3.1) are provided in holes at the upper and lower ends of the boom (3), and the extension direction of the rotating shaft of the boom rubber joint (3.1) points to the center of the bogie.

4. A traction device for a rail vehicle according to claim 1, characterized in that: A first corner (4.1) of the triangular swivel arm (4) is provided with a radial spherical bearing (4.4), and the second connecting rod (2) is connected to the triangular swivel arm (4) via the radial spherical bearing (4.4).

5. The traction device of a rail vehicle according to claim 1, characterized in that: A swivel arm mounting seat (9) is arranged on the frame (7), and the swivel arm mounting seat (9) comprises an upper mounting seat (9.1) and a lower mounting seat (9.2), and both the upper mounting seat (9.1) and the lower mounting seat (9.2) are provided with bushings (8), wherein the lower mounting seat (9.2) is also provided with a stopper (9.3) for preventing the bushing (8) from falling off downwards; the second corner (4.2) of the triangular swivel arm (4) is hinged to the swivel arm mounting seat (9).

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