AU2021391210A1 - Bogie shaft drive power generation device, bogie, and railway vehicle - Google Patents

Abstract

A bogie shaft drive power generation device. The bogie shaft drive power generation device comprises a motor (6), a fixing mechanism (5), a driving wheel (2), a pulley assembly (7), and a belt (3). The motor (6) is mounted on the fixing mechanism (5), and the fixing mechanism (5) is connected to a side frame (1) of the bogie and located in the middle of the side frame (1); the driving wheel (2) is mounted at the end portion of a wheel shaft composed of wheel sets of the bogie, and the pulley assembly (7) is provided on the fixing mechanism (5) and connected to a rotor of the motor (6); the pulley assembly (7) is connected to the driving wheel (2) by means of the belt (3). The occupied space of the shaft drive power generator device is reduced, existing bogies are not required to be modified, and the existing structures thereof are fully utilized. Also disclosed are a bogie having the bogie shaft drive power generation device and a railway vehicle having the bogie.

Description

BOGIE SHAFT-DRIVEN POWER GENERATION DEVICE, BOGIE AND RAILWAY VEHICLE CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present disclosure claims a priority of Chinese Patent Application No. 202011388877.4, entitled "BOGIE SHAFT-DRIVEN POWER GENERATION DEVICE, BOGIE AND RAILWAY VEHICLE" and filed on December 1, 2020, the entire disclosure of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The embodiments of the disclosure relate to the field of railway vehicle technology, and particularly to a bogie shaft-driven power generation device, a bogie and a railway vehicle.

BACKGROUND

[0003] At present, China's railway freight vehicles are still dominated by mechanical technology, and have always been in an out-of-power state as electrification and automation have not been realized yet. With the increase of the load and velocity of vehicles, railway transportation safety is becoming increasingly serious. Although enormous research and applications have been carried out to ensure transportation safety, such as the use of a ground infrared system which may monitor the temperature of bearings and an automatic weighing rail platform which may detect the states of vehicles such as loading, overloading and unbalance loading, these measures are stationary and static, have the problems of delay and discontinuity for moving vehicles, and cannot realize online real-time dynamic detection. With the development of new technologies such as sensing technology, fault monitoring and diagnosis, the dynamic online monitoring technology of railway freight vehicles has been proposed and gradually applied to the safety system of railway freight trains. However, the prerequisite for applying these new technologies is that the problem of supplying power to railway freight vehicles must be solved.

[0004] The conventional centralized power supply manner for locomotives is to conduct electric energy through a pantograph, which requires a power supply cable that runs through a train. In addition, most of electrical components necessary for supplying power to railway freight vehicles are various sensors. Electrical components have lower power consumption, thus costs are high for both the modification of existing vehicles and the manufacture of new vehicles. Other automatic bogie shaft end power generation technologies can hardly be applied to major K4 and K5 bogies of general railway freight vehicles in China. Therefore, there is a need to develop a self-power generation device for railway freight vehicles, which is well-adaptive and easy to maintain and use, to solve the problem of supplying power to railway freight vehicles.

[0005] As for shaft-end power generation devices in the prior art, generators have the technical problems of poor performance, low reliability, and short service life, and existing bogies need to be structurally modified during installation as the shaft-end power generation devices cannot adapt to the structure of the existing bogies.

SUMMARY

[0006] To solve the above technical problems, it is necessary to provide a bogie shaft-driven power generation device, a bogie and a railway vehicle so as to greatly reduce the space occupied by the shaft-driven power generation device, and make full use of the existing structure of the bogie with no need of modifying the existing bogie.

[0007] In a first aspect of the present disclosure, a bogie shaft-driven power generation device is provided comprising: a motor, a fixing mechanism, a driving wheel, a pulley assembly and a belt, wherein: the motor is installed on the fixing mechanism which is connected with a side frame of a bogie and located in a middle part of the side frame; the driving wheel is installed at an end portion of a wheel shaft of a wheel set assembly of the bogie; the pulley assembly is disposed on the fixing mechanism and connected with a rotor of the motor; and the belt is sleeved on the pulley assembly and the driving wheel.

[0008] In some embodiments, the fixing mechanism comprises a base and a fixing plate member which is connected with the side frame; and the base is used to install the motor and disposed on the fixing plate member to form a cantilever beam structure.

[0009] In some embodiments, the fixing plate member comprises an upper fixing plate and a lower fixing plate, and the upper fixing plate is connected with the lower fixing plate to form an installation chamber, through which the fixing plate member is installed on the side frame.

[0010] In some embodiments, the fixing mechanism further comprises a reinforcing base which is disposed on the side frame at one end and connected with a cantilever end of the base at another end so that the side frame, the base and the reinforcing base constitute a triangular support structure.

[0011] In some embodiments, the base comprises a major plate and a side plate that are fixedly connected, the major plate being connected with the side frame by the lower fixing plate, the side plate being connected with the reinforcing base.

[0012] In some embodiments, the pulley assembly comprises a driven wheel, a fixing shaft, a bearing and an outer cover plate, and wherein: the driven wheel is installed on the fixing shaft by the bearing, and is connected with the driving wheel by the belt; the fixing shaft isfixedly installed on the fixing mechanism; and the outer cover plate is rotatably connected with the fixing shaft, and the driven wheel and the rotor of the motor are respectively connected with the outer cover plate to transmit a torque.

[0013] In some embodiments, the motor and the pulley assembly are respectively disposed on both sides of the fixing mechanism.

[0014] In some embodiments, the fixing shaft is a hollow shaft, and the fixing mechanism is formed with an installation hole, and the rotor of the motor passes through the installation hole and extends into one end of the fixing shaft; and the outer cover plate comprises a plate member and a transmission shaft fixedly connected with the plate member, and the plate member is fixedly connected with the driven wheel, and the transmission shaft extends into another end of the fixing shaft, and the transmission shaft is connected with the rotor.

[0015] In some embodiments, the pulley assembly further comprises an inner cover plate provided on an inner side of the outer cover plate and located between an outer end face of the fixing shaft and the outer cover plate.

[0016] In some embodiments, the bogie shaft-driven power generation device may further comprise a belt tension mechanism, wherein: the fixing mechanism is provided with an installation plate, and the belt tension mechanism is installed on the installation plate and located between the driving wheel and the pulley assembly.

[0017] In some embodiments, the belt tension mechanism comprises an adjusting mechanism and a tension assembly, and wherein: the adjusting mechanism passes through the base to be connected with the tension assembly; the tension assembly comprises a tension arm and a guide wheel; the tension arm is rotatably installed on the fixing mechanism to constitute a lever mechanism; the guide wheel is disposed at an resistance end of the tension arm and is in rolling contact with the fixing mechanism or the side frame of the bogie, and a power end of the tension arm abuts against the pulley assembly at one side and abuts against the adjusting mechanism at another side.

[0018] In some embodiments, the adjusting mechanism comprises a screw, a nut and an elastic member, wherein the bolt is installed on the installation plate and locked by the nut at one end and abuts against the tension arm at another end, and the elastic member is sleeved on the screw and located between the installation plate and the tension arm.

[0019] In some embodiments, the adjusting mechanism also comprises a spring pad sleeved on the screw, and the elastic member is located between the installation plate and the spring pad.

[0020] In some embodiments, the fixing mechanism further comprises a backing plate located on an inner side of the side frame, and the backing plate, the side frame and the lower fixing plate are connected by a connecting member.

[0021] In a second aspect of the disclosure, a bogie is provided comprising the bogie shaft-driven power generation device mentioned above.

[0022] In some embodiments, a fixing mechanism of the bogie shaft-driven power generation device is disposed on an oblique arm of a side frame, and the oblique arm is located between a wheel set installation position and a bolster installation position.

[0023] In a third aspect of the disclosure, a railway vehicle is provided comprising the bogie mentioned above.

[0024] The motor of the bogie shaft-driven power generation device according to some embodiments of the present disclosure is installed on a fixing mechanism, and thefixing mechanism is connected with the side frame of the bogie and located in the middle part of the side frame. When the motor is installed, the structural space of the bogie itself is fully utilized and there is no need to modify the framework of the existing bogie. The driving wheel is disposed at the end portion of the wheel shaft of a wheel set of the bogie and coaxially rotates with the wheel set; the pulley assembly is disposed on the fixing mechanism and connected with the rotor of the motor; the pulley assembly is connected with the driving wheel by a belt, and the wheel set of the bogie drives the rotation of the driving wheel, then the rotation of the driving wheel is transmitted to the pulley assembly by the belt to thereby drive the rotation of the rotor of the motor so as to realize power generation.

[0025] The main body of power generation (the motor and pulley assembly) of the bogie shaft-driven power generation device according to some embodiments of the present disclosure is connected with the side frame of the bogie by the fixing mechanism, and located in the middle part of the side frame, i.e., located between the wheel set installation position and the bolster installation position, which is an integrated arrangement. However, the power generation device in the prior art uses an expanded installation manner, thus the installation of a generator needs to modify the structure of the existing side frame by either lengthening an end of the side frame or welding the suspension support for the generator to an end of the side frame, which is not suitable for the structure of the existing bogie.

[0026] When the bogie shaft-driven power generation device according to some embodiments of the present disclosure is applied to an existing bogie, the location thereof between the wheel set installation position and the bolster installation position due to the integrated arrangement can greatly reduce the space occupied by the shaft-driven power generation device, make full use of the existing structure of the bogie without the need of modifying the existing bogie.

[0027] When the bogie with the shaft-driven power generation device provided by the present disclosure is applied to the existing railway vehicles, the shaft-driven power generation device can generate power stably and reliably, solve the problem of supplying power to railway freight vehicles by means of one or more embodiments of the present disclosure, and be maintained at low costs.

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG.1 shows an installation schematic view of a bogie shaft-driven power generation device according to one or more embodiments of the present disclosure;

[0029] FIG. 2 shows a structural schematic view of a bogie shaft-driven power generation device according to one or more embodiments of the present disclosure;

[0030] FIG. 3 shows a structural schematic view of a fixing mechanism installed on a side frame of a bogie shaft-driven power generation device according to one or more embodiments of the present disclosure;

[0031] FIG. 4 shows a structural schematic view of a pulley assembly of a bogie shaft-driven power generation device according to one or more embodiments of the present disclosure;

[0032] FIG. 5 shows a structural schematic view of a base of a bogie shaft-driven power generation device according to one or more embodiments of the present disclosure; and

[0033] FIG. 6 shows a structural schematic view of a bogie according to one or more embodiments of the present disclosure.

[0034] Reference numerals: 1side frame; 2 driving wheel; 3 belt; 4 belt tension mechanism; 41 adjusting mechanism; 411 nut; 412 elastic member; 413 spring pad; 414 bolt; 42 tension arm assembly; 421 tension arm; 422 guide wheel; 5 fixing mechanism; 51 reinforcing base; 52 base; 53 upper fixing plate; 54 lower fixing plate; 55 backing plate; 6 motor; 7 pulley assembly; 71 pulley; 72 fixing shaft; 73 bearing; 74 outer cover plate; 75 inner cover plate; 8 inclined wedge base; 9 fender keyhole; 10 square hole; 11 triangular hole; and 12 oblique arm.

DETAILED DESCRIPTIONN

[0035] In order to enable those skilled in the art to understand the present disclosure more clearly, the technical solutions of the present disclosure will be described in detail through embodiments in conjunction with the drawings. In order to solve the technical problems in the prior art that the existing bogie shall be structurally modified to install the power generation device as the latter cannot adapt to the structure of the existing bogie, and the generator has poor performance, low reliability and short service life, the present disclosure provides a bogie shaft-driven power generation device. The bogie shaft-driven power generation device according to the present disclosure can comprise a motor 6, a fixing mechanism 5, a driving wheel 2, a pulley assembly 7 and a belt 3; wherein the motor 6 is installed on the fixing mechanism 5 which is connected with the side frame 1 of the bogie and located in the middle of the side frame 1, and when the motor 6 is installed, the structural space of the bogie itself is fully utilized and there is no need to modify the framework of the existing bogie; the driving wheel 2 is disposed at an end portion of a wheel shaft of a wheel set of the bogie and coaxially rotates with a wheel set assembly; the pulley assembly 7 is disposed on the fixing mechanism 5 and connected with a rotor of the motor 6; the pulley assembly 7 is connected with the driving wheel 2 through the belt 3, and the wheel set assembly of the bogie drives the driving wheel 2 to rotate. The rotation of the driving wheel 2 is transmitted to the pulley assembly 7 by the belt 3 as so to drive the rotor of the motor 6 to rotate, thereby realizing power generation.

[0036] In comparison with the prior art, a power generation body (the motor and pulley assembly) of the bogie shaft-driven power generation device according to some embodiments of the present disclosure is connected with the side frame 1 of the bogie by the fixing mechanism 5, and located in a middle part of the side frame 1, i.e., located between a wheel set installation position and a bolster installation position, which is an integrated arrangement. However, the power generation device in the prior art uses an expanded installation manner, thus in order to install a generator, the structure of the existing side frame is needed to be modified by either lengthening an end of the side frame or welding a suspension support to an end of the side frame for the generator. Thus, the power generation device in the prior art is not suitable for the structure of the existing bogie. With the bogie shaft-driven power generation device according to some embodiments of the present disclosure, the space occupied can be greatly reduced, and the structure of the existing bogie can be made full use of without the need of modifying the existing bogie. Therefore, the technical problems in the prior art of inadaptability for the structure of the existing bogie, unstable performance of power generation and short service life can be solved.

[0037] When the bogie with the shaft-driven power generation device provided by the present disclosure is applied to the existing railway vehicles, the shaft-driven power generation device is stable and reliable in power generation, and can solve the problem of supplying power to railway freight vehicles and be maintained at low costs.

[0038] In a first aspect of the present disclosure, there is provided a bogie shaft-driven power generation device suitable for use in various bogies of railway freight vehicles. The structure of the bogie shaft-driven power generation device will be described in detail by taking the bogie shaft-driven power generation device applied to a three-piece bogie for example.

[0039] With reference to FIGS. 1 to 5, the bogie shaft-driven power generation device can comprise a motor 6, a fixing mechanism 5, a driving wheel 2, a pulley assembly 7 and a belt 3. The driving wheel 2 is installed at an end portion of a wheel shaft of a wheel set and coaxially rotates with the wheel set. The motor 6 is installed on the fixing mechanism 5 and disposed on the underside of the side frame 1 by the fixing mechanism 5. The motor 6 is located between the driving wheel and the side frame 1 and disposed on the side of the driving wheel 2 adjacent to a square hole 10 in the side frame 1. The square hole 10 is a bolster installation position, and the pulley assembly 7 is also disposed on the fixing mechanism 5 and connected with a rotor of the motor 6. The pulley assembly 7 is connected with the driving wheel 2 by the belt 3. The wheel set drives the rotation of the driving wheel 2, and the rotation of the driving wheel 2 is transmitted to the pulley assembly 7 by the belt 3 to drive the rotor of the motor 6 to rotate, thereby realizing power generation.

[0040] In some embodiments, the driving wheel 2 is fixed at an end portion of a vehicle wheel shaft by an original shaft end bolt, namely, the driving wheel 2 can be installed by the original bolts and three holes in a bearing end cover, without modifying the structure of the three-piece bogie. The driving wheel 2 is fixedly connected with the vehicle wheel shaft. When a vehicle is towed, the vehicle wheel shaft rotates to bring impetus, and the impetus is transmitted by the belt 3 to the pulley assembly 7 hanging under the side frame 1 of the bogie and then to the motor 6.

[0041] The motor 6 and the pulley assembly 7 can be fixed under the side frame 1 by the fixing mechanism 5. The fixing mechanism 5 can comprise a base 52 and a lower fixing plate 54. The base 52 is perpendicularly disposed on the lower fixing plate 54 and the lower fixing plate 54 is fixed at the lower part of the side frame 1 by the bolt. In order to enhance structural stability and resist external impact during motion, in some embodiments, the fixing mechanism 5 can also comprise an upper fixing plate 53. The lower fixing plate 54 is a flat plate fixed to the underside of the middle part of the side frame 1. In order to clad a fixing plate member onto the side frame 1, the middle part of the upper fixing plate 53 needs to be provided with a groove structurally matching the side frame 1, namely, after the fixation of the upper fixing plate 53 and the lower fixing plate 54, there is formed an installation chamber in the middle part, the size and structure of which is decided by the structure of the side frame 1. This embodiment does not limit the shape and size of the formed installation chamber as long as it structurally matches the side frame 1 for the sake of fixation. In some embodiments, the upper fixing plate 53 and the lower fixing plate 54 are fastened by bolts and nuts to form an installation chamber and are fixed on the side frame 1 through the installation chamber. The upper fixing plate 5 penetrates through a triangular hole 11 in the side frame 1 to be connected with the lowerfixing plate 54, making the structure of the fixing mechanism more reasonable. The motor is installed on the base 52 by a motor installation base. The motor installation base has a planar boss, which is embedded into a side frame hole in the side frame itself during installation. The side frame hole is a triangular hole in an oblique arm, which can fix and support the motor. The overall design is simple, reliable and low in cost.

[0042] The base 52 can comprise a major plate 521 and a side plate 522 that are fixedly connected. The side plate 522 is disposed on the major plate 521, and the major plate 521 is disposed on the side frame 1 by the lower fixing plate 54. In some embodiment, the major plate 521 is perpendicular to the lower fixing plate 54. The side plate 522 is perpendicular to the major plate 521 and an adjusting hole 103 is formed on the side plate 522. A plurality of holes are formed on the major plate 521. In order to guarantee the structural strength of the base 52, in the three-piece bogie of some embodiments, the side frame 1 is provided with an inclined wedge base 8. The top of the inclined wedge base 8 is symmetrically disposed on both sides of the side frame 1, and a fender keyhole 9 is formed on the inclined wedge base 8. In some embodiments, the fixing mechanism can also comprise an reinforcing base 51 for cooperating with the fender keyhole 9 of the inclined wedge base 8 of the three-piece bogie. An end of the reinforcing base 51 is disposed on the side frame 1 and another end of the reinforcing base 51 is connected with a cantilever end of the base 52, so that the side frame 1, the base 52 and the reinforcing base 51 constitute a triangular support structure. In some embodiments, the side plate 522 is connected with the reinforcing base 51; the reinforcing base 51 is fixed to the fender keyhole 9 in the side frame 1 by a bolt; the major plate 521 is perpendicularly welded to the lower fixing plate 54; the reinforcing base 51 is perpendicularly welded to the side plate 522; and the side frame 1, the base 52 and the reinforcing base 51 constitute a triangular support structure, thereby improving the mechanical strength of the fixing mechanism 5 so that the fixing mechanism 5 can bear the motor 6 and the pulley assembly 7, as well as the traction and impact brought by power transmission.

[0043] In order to guarantee smooth connection, in some embodiments, the fixing mechanism 5 can also comprise a backing plate 55 located on an inner side of the side frame 1, and the lower fixing plate 54 is fixed under the side frame 1 by bolts and nuts which connect the backing plate 55, the side frame 1 and the lower fixing plate 54. The backing plate 55 can eliminate the defect that the unsmooth cast plane in the side frame may render bolts loose easily, such that the bolts that fix the lower fixing plate 53 can be flat and firm.

[0044] The pulley assembly 7 can comprise a driven wheel 71, a fixing shaft 72, a bearing 73 and an outer cover plate 74. The driven wheel 71 is installed on the fixing shaft 72 by the bearing 73, and is connected with the driving wheel 2 by the belt 3. The fixing shaft 72 is fixedly installed on the fixing mechanism 5. The outer cover plate 74 is rotatably connected with the fixing shaft 72, and the driven wheel 71 and the rotor of the motor 6 are respectively connected with the outer cover plate 74 to transmit a torque.

[0045] In order to realize the clearance connection between the rotor of the motor and the pulley assembly 7 and meanwhile prevent the rotor of the motor 6 from bearing the weight of the pulley assembly 7 to guarantee the stable operation of the motor 6, in the bogie shaft-driven power generation device provided by the present embodiment, the motor 6 and the pulley assembly 7 are respectively disposed on both sides of the fixing mechanism 5. The fixing shaft 72 is a hollow shaft. An installation hole is formed in the fixing mechanism 5. The rotor of the motor 6 may pass through the installation hole and extend into one end of the fixing shaft 72. The outer cover plate 74 comprises a plate member and a transmission shaft centrally disposed in and fixedly connected with the plate member. The plate member is fixedly connected with the driven wheel 71. The transmission shaft extends into another end of the fixing shaft 72, and the transmission shaft is connected with the rotor of the motor 6.

[0046] In some embodiments, the major plate 521 is provided with an installation hole; the fixing shaft 72 is a hollow shaft and fixedly installed on the major plate 521 of the base 52; the bearing 73 can be a double row deep groove ball bearing; an outer ring of the bearing 73 is in transition fit with the driven wheel 2 and an inner ring of the bearing 73 is in interference fit with the fixing shaft 72. The outer cover plate 74 is provided on an outer end face of thefixing shaft 72, and the transmission shaft of the outer cover plate 74 passes through the hollow shaft of the fixing shaft 72; the rotor of the motor 6 passes through the installation hole in the base 52 and the hollow shaft of the fixing shaft 72 to be connected with the transmission shaft key of the outer cover plate 74, thereby making the outer cover plate 74 to be connected to the rotor of the motor 6. The outer cover plate 74 and the driven wheel 71 are fixed together by bolts, and the outer cover plate 74, the fixing shaft 72 and the driven wheel 71 form a sealing chamber to prevent dusts and debris from entering into the moving parts. Thus, the outer cover plate not only functions to seal, but also transmit a torque in the following path: the belt 3 transmits the power of the driving wheel 2 to the driven wheel 71, then the driven wheel 71 transmits the power torque to the outer cover plate 74 by a bolt, then an end of the transmission shaft of the outer cover plate 74 is connected with a spline on the rotor of the motor 6, thereby realizing the transmission of torque, which drives rotation of the rotor to realize power generation. In this embodiment, the driven wheel is installed by the hollow shaft fixed on the fixing mechanism, and the weight of the motor and the pulley assembly is bome by the fixing mechanism, and the rotor of the motor does not bear weight, which can improve the reliability and service life of the motor.

[0047] In order to further guarantee airtightness and improve performance, in some embodiments, the pulley assembly 7 can also comprise an inner cover plate 75 that is disposed on an inner side of the outer cover plate 74 and located between the outer end face of the fixing shaft 72 and the outer cover plate 74.

[0048] In actual use, the belt 3 will deform over time, and the friction between the belt 3 and the driving wheel 2, as well as the pulley assembly 7 decreases. In order to guarantee the tension of the belt 3 and facilitate the installation and adjustment of the belt, in some embodiments, a belt tension mechanism 4 can be disposed under the side frame 1. The belt tension mechanism is disposed on the side frame by an installation plate arranged on the fixing mechanism and is located between the driving wheel and the pulley assembly. The belt tension mechanism 4 can compress the belt 3 to provide the tension of the belt 3. The belt tension mechanism 4 can make the installation of the belt 3 easier.

[0049] The belt tension mechanism 4 can be installed on the side frame 1 by the installation plate arranged on the fixing mechanism 5 and is located between the driving wheel 2 and the pulley assembly 7. In order to simplify the structure of the device, the side plate 522 can serve as the installation plate, and the belt tension mechanism 4 is disposed at one end on the fixing mechanism 5 and at one end in contact with the belt 3. After the installation of the belt 3, the belt tension mechanism 4 increases the friction between the belt 3 and the driving wheel 2, as well as the pulley assembly 7.

[0050] In some embodiments, the belt tension mechanism 4 comprises a tension assembly 42 rotatable about a shaft and an adjusting mechanism 41 movable longitudinally. The belt tension mechanism can also comprise an adjusting mechanism and a tension assembly. The adjusting mechanism passes through the base to be connected with the tension assembly. The tension assembly 42 can also comprise a tension arm 421 and a guide wheel 422. The tension arm 421 is rotatably installed on the fixing mechanism 5 to constitute a lever mechanism. The guide wheel 422 is disposed at an resistance end of the tension arm 421 and is in rolling contact with the fixing mechanism 5 or the side frame 1 of the bogie, and the power end of the tension arm 421 abuts against the pulley assembly 7 at one side and abuts against the adjusting mechanism 41 at another side. In some embodiments, the guide wheel 422 is disposed at an end of the tension arm adjacent to the belt 3, and the power end of the tension arm 421 abuts against the driven wheel 71 at one side and abuts against the adjusting mechanism 41 at another side. The tension arm 421 rotates around a shaft by means of a hole in the major plate 521 to compress or loosen the belt 3.

[0051] The adjusting mechanism 41 can comprise a longitudinally extending screw 414, an elastic member 412 and a nut 411. The screw 414 is installed on the installation plate. An end of the screw 414 is locked by the nut 411 and another end thereof abuts against the tension arm 421. The elastic member 412 is sleeved on the screw 414 and located between the installation plate and the tension arm 421. In some embodiments, the adjusting mechanism 41 is disposed on the base 52 at one end and abuts against the lower part of the tension arm 42 at another end. The pre-compression force of the elastic member 412 is adjusted by the amount of movement of the nut 411. In some embodiments, one end of the screw 414 passes through the base 52 through the adjusting hole 103 in the side plate 522, and another end of the screw 414 abuts against the tension arm 421. The elastic member 412 is a spring sleeved on the screw 414. The nut 411 is an adjusting nut threadedly matching the screw 414. In order to facilitate the adjustment of the belt tension mechanism, in some embodiments, the adjusting mechanism 41 can also comprise a spring pad 413 sleeved on the screw 414. The elastic member 412 is located between the side plate 522 and the spring pad 413 and is fixed with the base 52 by the spring pad 413. The spring pad 413 sleeved on the screw 414 and the compression spring of the base 52 provide a pre-compression force. The screw 414 longitudinally abuts against the tension arm 421 at one end under the elastic force of the spring. The tension arm 421 guidedly rotates about the shaft in the hole 101 under the limitation of a guide hole 102. At this time, the guide wheel 422 compresses the belt 3 and also guides the belt 3.

[0052] The bogie shaft-driven power generation device according to the embodiment of the present disclosure can be applicable to various bogies of railway freight vehicles and is not limited to the three piece bogie shown in FIG. 1. In the power generation device in the prior art, the motor is installed on the side of the wheel which is far away from the side frame. The installation of the generator needs to modify the structure of the existing side frame by either lengthening an end of the side frame or welding a suspension support for the generator to an end of the side frame, which is not suitable for the structure of the existing bogie. In the bogie shaft-driven power generation device according to some embodiments of the present disclosure, the driving wheel 2 can be installed by the original bolts and three holes in a bearing end cover. The motor 6 is directly installed on the side frame 1, and the side frame 1 fixes and supports the power generation device. The overall design is simple, reliable and low in cost.

[0053] In the power generation device in the prior art, the stator and the rotor are fixed separately. Due to the axial transmission and radial runout of the vehicle shaft and the adapter in operation, the clearance between the stator and the rotor changes, which affects the performance and reliability of the generator; and meanwhile, the entire weight of the power generation device is borne by the rotor that is directly connected to the shaft end of the vehicle shaft. The increased weight of the wheel shaft will affect the performance of operation of the power generation device, and the direct connection between the rotor and the shaft end results in no buffer between the generator and the wheel shaft, which influences the reliability and service life of the generator. In the bogie shaft-driven power generation device according to some embodiments of the present disclosure, members except the driving wheel 2 are all installed under the bogie by the fixing mechanism 5, and the action force and gravity are in the same direction, so that the bogie shaft-driven power generation device has strong stability; meanwhile, the pulley assembly 7 and the motor 6 are respectively disposed at both sides of the fixing mechanism 5 to form a fixed balance and further improve the stability. In addition, the installation of the motor 6 as a whole and the clearance connection between the outer shaft end cover plate 74 of the pulley assembly 7 and the motor 6 can separate the driven wheel 71 from the rotor shaft of the motor 6, and the rotor shaft of the motor 6 does not bear the weight of the pulley assembly 7, which can improve the reliability and service life of the motor 6.

[0054] In a second aspect of the present disclosure, there is provided a bogie, which can be any bogie in the prior art, such as a three-piece bogie or a frame-type bogie. Different from the prior art, the bogie according to some embodiments of the present disclosure is also provided with the bogie shaft driven power generation device. Since the specific structure of the bogie is not improved, reference can be made to the prior art for other structures of the bogie, which will not be further explained. Reference shall be made to the first aspect of the present disclosure for the specific structure of the bogie shaft-driven power generation device, which will not be reiterated.

[0055] The bogie according to some embodiments of the present disclosure will be further explained by taking the three-piece bogie as an example.

[0056] The three-piece bogie according to some embodiments of the present disclosure can comprise a bolster assembly, a wheel set assembly, a side frame assembly, a shaft box device, an elastic suspension system and a braking device, wherein the side frame assembly can comprise two side frames; each part of the side frame assembly is groove-shaped in cross-section or made into a hollow box, and the longitudinal center of the side frame is formed with a square hole 10 that is a bolster installation position for installing the bolster assembly, and two ends of the side frame are the wheel set installation position for installing the wheel set; and the wheel set installation position and the bolster installation position are connected by the oblique arm 12. The oblique arms 12 on both sides of the bolster installation position are each formed with a triangular hole11 located between the wheel set installation position and the bolster installation position; the shaft box device connects the wheel set assembly with the side frame assembly, and the bolster assembly connects the two side frames 1; the side frame 1 is provided with an inclined wedge base 8; the top of the inclined wedge base 8 is symmetrically disposed on both sides of the side frame 1, and the inclined wedge base 8 is formed with a fender keyhole 9.

[0057] In some embodiments, the bogie shaft-driven power generation device is disposed in a middle part of the side frame 1; thefixing mechanism 5 is disposed between the wheel set installation position and the bolster installation position of the side frame 1; the reinforcing base 51 is installed on the fender keyhole 9 at one end and welded to the side plate 522 of the base 52 at another side; the major plate 521 of the base 52 is welded to the lower fixing plate 54; the lower fixing plate 54 is perpendicularly installed on the oblique arm 12 of the side frame 1 by a bolt and a nut; the installation chamber between the upper fixing plate 53 and the lower fixing plate 54 extends through the triangular hole of the oblique arm 12 and clads the oblique arm 12; the upper fixing plate 53 and the lowerfixing plate 54 are fixed by a bolt and a nut. The assemblies except the fixing mechanism 5 are identical with those in the embodiment 1 in terms of the installation manner and structure, and will not be described specifically in this embodiment.

[0058] Since the bogie according to some embodiments of the present disclosure has the bogie shaft driven power generation device, it also has the technical effect of the bogie shaft-driven power generation device. In addition, the bogie according to some embodiments of the present disclosure can be installed with the bogie shaft-driven power generation device without changing the original structure or adding installation hole, which solves the problem of supplying power to railway freight vehicles, has low maintenance cost and meanwhile a stable and reliable power generation.

[0059] In a third aspect of the present disclosure, there is provided a railway vehicle. The railway vehicle can be any existing railway vehicle, such as general-purpose freight vehicles like gondola vehicles, box vehicles or flat vehicles, or specialized freight vehicles like tank vehicles, refrigerator vehicles, ore vehicles, cement vehicles, live fish vehicles, special vehicles or heavy-duty freight vehicles. The railway vehicle according to some embodiments of the present disclosure is configured with the bogie according to some embodiments of the present disclosure, that is, all bogies of the railway vehicle are like the one as stated above. Of course, in other embodiments, one or some bogies of the railway vehicle are like the one as stated above. The present disclosure sets no limitation to the specific use thereof. The embodiments of the present disclosure do not improve other structures of the railway vehicle, so that reference can be made to the prior art for other structures of the railway vehicle, which will not be expounded herein. Reference shall be made to the bogie according to the embodiments of the present disclosure for the specific structure of the bogie, which will not be reiterated.

[0060] The bogie shaft-driven power generation device according to some embodiments of the present disclosure is fully suitable for installation on the major types of general bogies of railway freight vehicles in China without changing the structure of the bogies, and applicable to frame-type and three piece bogies without affecting the structure of bogies. The driving wheel can be installed by the original bolts and three holes in a bearing end cover; the installation chamber of the fixing mechanism has a planar boss, which is directly clad on the side frame hole or oblique arm of the existing three piece bogie to fix and support the motor. The overall design is simple, reliable and low in cost.

[0061] In the bogie shaft-driven power generation device according to some embodiments of the present disclosure, the clearance connection between the outer shaft end cover plate of the pulley assembly and the rotor of the motor can separate the pulley from the rotor shaft of the motor, and the rotor shaft does not need to bear the weight of the pulley, which can improve the reliability of the generator.

[0062] In the bogie shaft-driven power generation device according to some embodiments of the present disclosure, the motor, which is currently installed on the outer side of the end portion of the bogie, is modified to be installed on the underside in the middle part of the side frame, and the bogie shaft-driven power generation device is disposed in the middle part of the side frame by the fixing mechanism and is integrally installed with the existing bogie; and meanwhile, the reinforcing base is installed on the fender keyhole of the side frame to fix the belt tension mechanism and the fixing mechanism with no need of expanding the space of the end portion or changing the original structure of the side frame. Instead, the original structure of the side frame is fully utilized.

[0063] Although the preferred embodiments of the present disclosure have been described, those ordinarily skilled in the art can make other modifications and alterations to these embodiments once they learn the basic creative concepts. Hence, the appended claims are intended to be construed as including the preferred embodiments, and all modifications and alterations falling into the scope of the present disclosure.

[0064] Obviously, those skilled in the art can make various modifications and alterations to the present disclosure without departing from the spirit or scope of the present disclosure. Therefore, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and equivalent technologies thereof, the present disclosure is also intended to cover these modifications and variations.

Claims (17)

1. A bogie shaft-driven power generation device, comprising: a motor, a fixing mechanism, a driving wheel, a pulley assembly and a belt, wherein: the motor is installed on the fixing mechanism which is connected with a side frame of a bogie and located in a middle part of the side frame; the driving wheel is installed at an end portion of a wheel shaft of a wheel set assembly of the bogie; the pulley assembly is disposed on the fixing mechanism and connected with a rotor of the motor; and the belt is sleeved on the pulley assembly and the driving wheel.

2. The bogie shaft-driven power generation device of claim 1, wherein the fixing mechanism comprises a base and a fixing plate member which is connected with the side frame; and the base is used to install the motor and disposed on thefixing plate member to form a cantilever beam structure.

3. The bogie shaft-driven power generation device of claim 2, wherein the fixing plate member comprises an upper fixing plate and a lower fixing plate, and the upper fixing plate is connected with the lower fixing plate to form an installation chamber, through which the fixing plate member is installed on the side frame.

4. The bogie shaft-driven power generation device of claim 3, wherein the fixing mechanism further comprises a reinforcing base which is disposed on the side frame at one end and connected with a cantilever end of the base at another end so that the side frame, the base and the reinforcing base constitute a triangular support structure.

5. The bogie shaft-driven power generation device of claim 4, wherein the base comprises a major plate and a side plate that are fixedly connected, the major plate being connected with the side frame by the lower fixing plate, the side plate being connected with the reinforcing base.

6. The bogie shaft-driven power generation device of any one of claims 1 to 5, wherein the pulley assembly comprises a driven wheel, a fixing shaft, a bearing and an outer cover plate, and wherein: the driven wheel is installed on the fixing shaft by the bearing, and is connected with the driving wheel by the belt; the fixing shaft is fixedly installed on the fixing mechanism; and the outer cover plate is rotatably connected with the fixing shaft, and the driven wheel and the rotor of the motor are respectively connected with the outer cover plate to transmit a torque.

7. The bogie shaft-driven power generation device of claim 6, wherein the motor and the pulley assembly are respectively disposed on both sides of thefixing mechanism.

8. The bogie shaft-driven power generation device of claim 7, wherein the fixing shaft is a hollow shaft, and the fixing mechanism is formed with an installation hole, and the rotor of the motor passes through the installation hole and extends into one end of the fixing shaft; and the outer cover plate comprises a plate member and a transmission shaftfixedly connected with the plate member, and the plate member is fixedly connected with the driven wheel, and the transmission shaft extends into another end of the fixing shaft, and the transmission shaft is connected with the rotor.

9. The bogie shaft-driven power generation device of claim 8, wherein the pulley assembly further comprises an inner cover plate provided on an inner side of the outer cover plate and located between an outer end face of the fixing shaft and the outer cover plate.

10. The bogie shaft-driven power generation device of claim 6, further comprising a belt tension mechanism, wherein: the fixing mechanism is provided with an installation plate, and the belt tension mechanism is installed on the installation plate and located between the driving wheel and the pulley assembly.

11. The bogie shaft-driven power generation device of claim 10, wherein the belt tension mechanism comprises an adjusting mechanism and a tension assembly, and wherein: the adjusting mechanism passes through the base to be connected with the tension assembly; the tension assembly comprises a tension arm and a guide wheel; the tension arm is rotatably installed on thefixing mechanism to constitute a lever mechanism; the guide wheel is disposed at an resistance end of the tension arm and is in rolling contact with the fixing mechanism or the side frame of the bogie, and a power end of the tension arm abuts against the pulley assembly at one side and abuts against the adjusting mechanism at another side.

12. The bogie shaft-driven power generation device of claim 11, wherein the adjusting mechanism comprises a screw, a nut and an elastic member, wherein the bolt is installed on the installation plate and locked by the nut at one end and abuts against the tension arm at another end, and the elastic member is sleeved on the screw and located between the installation plate and the tension arm.

13. The bogie shaft-driven power generation device of claim 12, wherein the adjusting mechanism also comprises a spring pad sleeved on the screw, and the elastic member is located between the installation plate and the spring pad.

14. The bogie shaft-driven power generation device of claim 3, wherein the fixing mechanism further comprises a backing plate located on an inner side of the side frame, and the backing plate, the side frame and the lower fixing plate are connected by a connecting member.

15. A bogie, comprising the bogie shaft-driven power generation device according to any one of claims 1 to 14.

16. The bogie of claim 15, wherein a fixing mechanism of the bogie shaft-driven power generation device is disposed on an oblique arm of a side frame, and the oblique arm is located between a wheel set installation position and a bolster installation position.

17. A railway vehicle comprising the bogie according to claim 15 or 16.