Metro bogie wheel driving system and bogie

Abstract

The utility model discloses a subway bogie wheel driving system and a bogie with the same, and belongs to the technical field of rail transit vehicle bogies, the driving system is externally arranged on the outer side of a bogie frame, and the driving system comprises a traction motor and a rotating arm arranged at the end part of an axle; an end cavity is formed in the position, located above the rotating arm, of the end of the framework side beam and used for installing a traction motor, and the traction motor drives the axle to drive the wheels to rotate through a transmission mechanism; the transmission mechanism is provided with a power input end A and a power transmission end B. The power input end A and the power transmission end B are distributed on the two sides of the axle. Wherein one end of the rotating arm is rotationally connected with the framework side beam, the other end of the rotating arm is connected with the framework side beam through the primary suspension, the driving system achieves light weight, meanwhile, the usable design space of the bogie is increased, the maintainability of the bogie is improved, and on the basis that the weight and load distribution of the bogie are optimized, the service life of the bogie is prolonged. Vibration and impact between wheel rails are effectively reduced, and the bearing structure of the bogie is optimized.

Description

Technical Field

[0001] This utility model relates to the field of rail transit vehicle bogie technology, and in particular to a subway bogie wheel drive system and bogie. Background Technology

[0002] Currently, the motor drive method for bogies used in domestic 80km / h subways is generally to install the motor on the crossbeam of the frame through a rigid connection, and transmit the power to the wheels through couplings and gearboxes. However, this method occupies a lot of space and is not easy to maintain and repair the motor.

[0003] Therefore, in view of the above problems, it is necessary for this utility model to provide a lighter and more integrated drive system. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a lighter and more integrated subway bogie wheel drive system and a bogie with the drive system, thereby increasing the design space available for the bogie and improving its maintainability while achieving weight reduction.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses a subway bogie wheel drive system, wherein the drive system is externally located on the outside of the bogie frame, and includes:

[0007] A traction motor capable of providing a power source, a swing arm mounted at the end of the axle; and

[0008] The frame side beam has an end cavity formed at its end above the swing arm for mounting the traction motor. The traction motor drives the axle to rotate the wheel through a transmission mechanism.

[0009] The transmission mechanism has a power input end A and a power transmission end B, and the power input end A and the power transmission end B are distributed on both sides of the axle;

[0010] One end of the swing arm is rotatably connected to the side beam of the frame, and the other end is connected to the side beam of the frame through a suspension system.

[0011] Furthermore, the power input end A is located on the side of the frame side beam, and the power transmission end B is located on the swing arm.

[0012] Furthermore, there is flexible transmission between the power input end A and the power transmission end B, and rigid transmission between the power transmission end B and the axle.

[0013] Furthermore, the power output shaft of the traction motor is cantilevered and externally mounted on the side of the frame side beam to form the power input end A of the transmission mechanism;

[0014] The transmission mechanism includes a gear shaft rotatably connected to the rotating arm to form the power transmission end B, and a large gear fixed to the end of the axle.

[0015] The gear shaft meshes with the large gear;

[0016] The end of the gear shaft is equipped with a pulley, which is connected to the power output shaft of the traction motor via belt drive or chain drive.

[0017] Furthermore, one end of the gear shaft is connected to the mounting hole opened in the rotating arm, and the gear shaft has teeth that mesh with the large gear corresponding to the position of the large gear. The end of the gear shaft is a free end, and the pulley is installed on the free end.

[0018] Furthermore, the gear shaft meshes with the large gear to reduce speed and transmit torque to the wheel.

[0019] Furthermore, the swing arm is equipped with a bearing, and the swing arm is rotatably connected to the axle through the bearing.

[0020] Furthermore, the number of traction motors is matched with the number of wheels.

[0021] The present invention discloses a bogie, which includes the aforementioned metro bogie wheel drive system.

[0022] In the above technical solution, the subway bogie wheel drive system provided by this utility model has the following advantages:

[0023] The drive system designed in this utility model is firstly located on the outside of the bogie. The traction motor is installed at the end cavity of the side beam of the bogie frame to realize the individual drive of the corresponding wheel, thereby optimizing the mass distribution and space utilization of the bogie.

[0024] Secondly, the traction motor transmits power to the axle through an external transmission mechanism. The power input end A and the power transmission end B of the transmission mechanism adopt flexible transmission, while the power transmission end B and the axle adopt rigid transmission. The combination of flexible and rigid transmission replaces the transmission mechanism in the traditional subway bogie, realizing the lightweighting of the bogie material and structure. At the same time, the external drive system greatly simplifies the daily maintenance cost of the traditional subway bogie drive system.

[0025] In addition, this utility model can effectively reduce the vibration and impact between the wheel and rail by optimizing the weight and load distribution of the bogie, and optimize the load-bearing structure of the bogie;

[0026] The bogie designed in this utility model includes the aforementioned subway bogie wheel drive system, and has the same beneficial effects as the drive system, which will not be described in detail here. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0028] Figure 1 This utility model discloses an axonometric drawing of a subway bogie wheel drive system;

[0029] Figure 2 This is an isometric view of a subway bogie wheel drive system disclosed in this utility model from another perspective;

[0030] Figure 3 This is a front view of a subway bogie wheel drive system disclosed in this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Frame side beam; 11. End cavity; 2. Traction motor; 3. Pulley; 4. Wheel; 5. Large gear; 6. Gear shaft; 7. Primary steel spring; 8. Swing arm; 81. Node; 9. Drive belt.

[0033] A. Power input end; B. Power transmission end. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0035] See Figure 1-3 As shown;

[0036] A utility model discloses a subway bogie wheel drive system, which is externally located on the outside of the bogie frame. The drive system includes:

[0037] Traction motor 2, which is used to provide a power source;

[0038] Swing arm 8, which is mounted on the end of the axle; and

[0039] The side beam 1 of the frame has an end cavity 11 formed above the swing arm 8 for mounting the traction motor 2. The traction motor 2 drives the axle to rotate the wheel 4 through the transmission mechanism.

[0040] The transmission mechanism has a power input end A and a power transmission end B, and the power input end A and the power transmission end B are distributed on both sides of the axle;

[0041] One end of the swing arm 8 is rotatably connected to the side beam 1 of the frame, and the other end is connected to the side beam 1 of the frame through a primary suspension, thereby absorbing high-frequency vibration and impact between the wheel and rail.

[0042] Specifically, the drive system is externally mounted, and the swing arm 8 is rotatably connected to the end of the axle, so that the upper space of the swing arm 8 can be used to expand the space of the end cavity 11 of the frame side beam 1, and the traction motor 2 is installed in the end cavity 11 of the frame side beam 1, so that the low-power traction motor 2 can drive the corresponding wheel alone. This can effectively increase the internal design space of the bogie and arrange other bogie components more reasonably, thus realizing the lightweighting and integration of the bogie, while also improving the maintainability of the traction system.

[0043] The transmission mechanism has a power input end A and a power transmission end B, and the power input end A and the power transmission end B are distributed on both sides of the axle. Preferably, the power input end A is arranged on the side of the frame side beam 1, and the power transmission end B is arranged on the swing arm 8. The transmission mechanism is external and reasonably laid out, which improves the maintainability of the drive system. In addition, the load-bearing capacity of the steering frame can also be further optimized.

[0044] Preferably, there is a flexible transmission between the power input end A and the power transmission end B, and a rigid transmission between the power transmission end B and the axle. By setting a flexible transmission between the power input end A and the power transmission end B, the transmission process can be made smooth, the impact and vibration that may be generated by the original rigid connection can be reduced, the impact and vibration during the transmission process can be absorbed and buffered, thereby reducing noise and improving the stability of torque transmission.

[0045] See Figure 2 As shown:

[0046] Preferably, the power output shaft of the traction motor 2 is cantilevered and externally mounted on the side of the frame side beam 1 to form the power input end A of the transmission mechanism;

[0047] The transmission mechanism includes a gear shaft 6 rotatably connected to the rotating arm 8 to form the power transmission end B, and a large gear 5 fixed to the end of the axle.

[0048] Gear shaft 6 meshes with large gear 5;

[0049] The end of the gear shaft 6 is equipped with a pulley 3, which is driven by a belt or chain to the power output shaft of the traction motor 2.

[0050] In this structure, a gear shaft 6 is installed at the swing arm 8, and a pulley 3 is installed at the end of the gear shaft 6. The traction motor 2 and the gear shaft 6 are connected by belt drive or chain drive to achieve flexible transmission between the force input end A and the power transmission end B. When a flexible transmission connection such as belt drive is used, the transmission process can be smooth, reducing the impact and vibration that may be generated by the original rigid connection, absorbing and buffering the impact and vibration during the transmission process, thereby reducing noise and improving the stability of torque transmission. Belt drive has good elasticity and can effectively adapt to the dynamic displacement of the primary suspension system. Preferably, the transmission belt 9 is made of flexible material, which can adapt to the longitudinal displacement of the bogie. In addition, when the transmission system is overloaded, slippage will occur between the belt and the pulley. This overload protection mechanism can improve the safety and reliability of the transmission system. At the same time, belt drive does not require lubrication, which can also reduce the maintenance cost of the bogie and environmental pollution.

[0051] Secondly, a large gear 5 is installed at the end of the axle. The gear shaft 6 meshes with the large gear 5 to transmit torque to the wheel, realizing rigid transmission between the power transmission end B and the axle. Each traction motor 2 drives the corresponding wheel 4, which can reduce the power of the drive motor. At the same time, the independent drive system can allow the wheel speed and torque to be adjusted in real time according to the curvature of the track, improving the vehicle's ability to pass through curves and reducing wheel-rail impact.

[0052] Furthermore, combining the traction motor 2 with the frame side beam 1 can save space while ensuring the overall structural strength of the frame, and eliminate the force generated by the transmission system on the frame crossbeam in the traditional structure. This structure further reduces the weight of the bogie.

[0053] See Figure 3 As shown:

[0054] Preferably, one end of the gear shaft 6 is connected to the mounting hole of the rotating arm 8, and the middle part of the gear shaft has teeth that mesh with the large gear 5. The end of the gear shaft 6 is a free end, and a pulley 3 is installed on the free end. Thus, the gear shaft 6 serves as a pulley output shaft. First, the friction between the transmission belt 9 and the pulley 3 is used to smoothly transmit the power from the output shaft of the traction motor 2 to the gear shaft 6. Then, the gear shaft 6 transmits the torque transmitted by the belt drive to the wheel by meshing with the large gear 5. The large gear 5 is installed at the end of the axle and reduces speed by meshing with the teeth on the gear shaft 6, thus transmitting the torque to the wheel 4.

[0055] Preferably, the swing arm 8 is equipped with a bearing, and the swing arm 8 is rotatably connected to the axle through the bearing.

[0056] Specifically, in this structure, the swing arm 8 is located on one side of the bearing and connected to the frame side beam 1 through a node, and on the other side of the bearing, it is connected to the wheelset and the frame through a primary suspension. It bears and transmits the loads generated by the vehicle's own weight and the unevenness of the track, and integrates various components of the transmission mechanism in the drive system. The primary suspension adopts a steel spring 7 and a vertical shock absorber integrated into one unit, which is installed between the spring seat at one end of the swing arm 8 and the frame side beam 1. It plays the role of supporting the weight of the vehicle body, transmitting braking force, and absorbing and attenuating the vibration and impact from the track to ensure the stability of the vehicle operation.

[0057] Preferably, the number of traction motors 2 matches the number of wheels; specifically, the traction motors 2 are synchronous motors.

[0058] In the above technical solution, this utility model provides a metro bogie wheel drive system. This drive system drives each wheel 4 individually to meet the current requirements for lightweight and integrated bogies, while reducing the weight of the bogie. Therefore, it helps to reduce the overall pressure of the vehicle on the track, thereby reducing the impact between the wheel and rail. By combining the transmission mechanism inside the traditional bogie with the frame side 1, the internal design space of the bogie is made more ample, providing sufficient conditions for the subsequent addition of equipment. At the same time, the external design of the traction motor 2 allows for maintenance of the traction motor 2 without disassembling the bogie when the train is in operation, improving the maintainability of the bogie, reducing the manufacturing cost of the bogie and the maintenance cost during use. In addition, reducing the space occupied by the internal motor can increase the flexibility of the bogie structural design, improve the overall structural stability of the bogie, and reduce wheel-rail impact by reducing the unsprung mass. The external traction motor can greatly reduce the crossbeam load and further optimize the bogie load-bearing structure. Furthermore, with each wheel 4 driven individually, a lower power motor can be used under the same required output driving force, reducing the additional vibration and impact caused by the current traditional drive system.

[0059] The utility model discloses a bogie that includes the aforementioned metro bogie wheel drive system. This bogie has the same beneficial effects as the metro bogie wheel drive system, which will not be elaborated upon here.

[0060] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A subway bogie wheel drive system, characterized in that: The drive system is externally located on the outside of the bogie frame and includes: a traction motor (2) capable of providing a power source; a swing arm (8) mounted on the end of the axle; and The frame side beam (1) has an end cavity (11) formed above the swing arm (8) for mounting the traction motor (2). The traction motor (2) drives the axle to rotate the wheel (4) through the transmission mechanism. The transmission mechanism has a power input end A and a power transmission end B, and the power input end A and the power transmission end B are distributed on both sides of the axle; One end of the swing arm (8) is rotatably connected to the side beam (1) of the frame, and the other end is connected to the side beam (1) of the frame through a suspension system.

2. The subway bogie wheel drive system according to claim 1, characterized in that... ； The power input end A is located on the side of the frame side beam (1), and the power transmission end B is located on the swing arm (8).

3. A subway bogie wheel drive system according to claim 1 or 2, characterized in that... ； Flexible transmission exists between the power input end A and the power transmission end B, while rigid transmission exists between the power transmission end B and the axle.

4. A subway bogie wheel drive system according to claim 3, characterized in that... ； The power output shaft of the traction motor (2) is cantilevered and externally mounted on the side of the frame side beam (1) to form the power input end A of the transmission mechanism; The transmission mechanism includes a gear shaft (6) rotatably connected to the rotating arm (8) to form the power transmission end B, and a large gear (5) fixed to the end of the axle. The gear shaft (6) meshes with the large gear (5); The end of the gear shaft (6) is equipped with a pulley (3), which is driven by a belt or chain to the power output shaft of the traction motor (2).

5. A subway bogie wheel drive system according to claim 4, characterized in that; One end of the gear shaft (6) is connected to the mounting hole of the rotating arm (8). The gear shaft (6) has teeth that mesh with the large gear (5) at the position corresponding to the large gear (5). The end of the gear shaft (6) is a free end, and the pulley (3) is installed on the free end.

6. A subway bogie wheel drive system according to claim 5, characterized in that; The gear shaft (6) meshes with the large gear (5) to reduce speed and transmit torque to the wheel (4).

7. A subway bogie wheel drive system according to claim 1, Its characteristics are: The rotating arm (8) is equipped with a bearing, and the rotating arm (8) is rotatably connected to the axle through the bearing.

8. A subway bogie wheel drive system according to claim 1, characterized in that... ； The number of traction motors (2) matches the number of wheels (4).

9. A bogie, characterized in that, Includes a subway bogie wheel drive system as described in any one of claims 1-8.

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