WO2023097834A1

WO2023097834A1 - Compact driving device, bogie and railway vehicle

Info

Publication number: WO2023097834A1
Application number: PCT/CN2021/141451
Authority: WO
Inventors: 张�杰; 张勇; 张云龙; 卢娜; 马荣; 张汉辰; 贾超; 张凯龙
Original assignee: 中车唐山机车车辆有限公司
Priority date: 2021-12-03
Filing date: 2021-12-27
Publication date: 2023-06-08
Also published as: CN114162148A

Abstract

Embodiments of the present application provide a compact driving device, a bogie, and a rail vehicle. The driving device comprises: a gearbox, a driving motor, and a coupling connected between the gearbox and the driving motor. The gearbox comprises a gearbox body and connecting arms. One end of each connecting arm is fixed to the side of the gearbox body facing the driving motor, and the other end of the connecting arm obliquely extends outwards and is connected to a shell of the driving motor. A recess space is formed between the connecting arms. The side of the shell of the driving motor facing the gearbox is recessed to form a recess space. The recess space of the driving motor and the recess space formed by the connecting arm enclose an accommodating space. The coupling is provided in the accommodating space. According to the technical solution provided by the embodiments of the present application, the volume of the driving device can be reduced, such that the occupied space is reduced.

Description

Compact drives, bogies and rail vehicles

technical field

The present application relates to the technical field of rail vehicles, in particular to a compact driving device, a bogie and a rail vehicle.

Background technique

Rail vehicles are an important transportation link connecting cities, and have gradually become the main means of transportation in cities. Rail vehicles are also the main carrier for cargo transportation. The rail vehicle mainly includes: a car body and a bogie arranged under the car body. The bogie is used to carry the car body and realize the running and steering functions.

The bogie is divided into a power bogie and a non-power bogie, and the power bogie is provided with a driving device for driving the wheels to rotate. The driving device usually includes a driving motor and a gear box. The shaft end of the driving motor is connected with the shaft end of the gear box through a coupling, and the torque is transmitted through the coupling. However, due to the larger size of the coupling, the overall volume of the driving device is larger, and it is more difficult to arrange on the bogie, and it also causes great difficulties in the installation of other components.

Contents of the invention

The embodiment of the present application provides a compact driving device, a bogie and a rail vehicle.

According to the first aspect of the embodiment of the present application, a compact drive device is provided, including: a gear box, a drive motor, and a coupling connected between the gear box and the drive motor;

The gear box includes: a gear box body and a connecting arm, one end of the connecting arm is fixed to the side of the gear box body facing the driving motor, and the other end of the connecting arm extends obliquely outwards and is connected to the housing of the driving motor on; a recessed space is formed between the connecting arms;

The casing of the driving motor is recessed inwardly toward the side of the gear box to form a recessed space; the recessed space of the driving motor and the recessed space formed by the connecting arm enclose an accommodation space, and the coupling is arranged in the accommodation space.

According to a second aspect of the embodiments of the present application, there is provided a bogie, comprising: the above-mentioned compact driving device.

According to a third aspect of the embodiments of the present application, a rail vehicle is provided, including: the rail vehicle as described above.

With the driving device provided in this embodiment, the gearbox casing is connected to the drive motor through the connecting arm, a recessed space is formed between the connecting arms, and the end of the housing of the driving motor also forms a recessed space, which is connected between the gearbox and the driving motor. The inter-coupling is located in the recessed space and no longer occupies the space between the gear box and the driving motor, which can reduce the distance between the gear box and the driving motor, make the structure compact, and reduce the volume of the driving device.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

Fig. 1 is the perspective view of the bogie provided by the embodiment of the present application;

Fig. 2 is the top view of the bogie provided by the embodiment of the present application;

Fig. 3 is a structural schematic diagram of a wheel set and a driving device in a bogie provided by an embodiment of the present application;

Fig. 4 is a top view of the wheel set and the driving device in the bogie provided by the embodiment of the present application;

Fig. 5 is a structural schematic diagram of a gear box and a driving motor in a bogie provided by an embodiment of the present application;

Fig. 6 is a cross-sectional view of the gearbox in the bogie provided by the embodiment of the present application and the driving motor connected;

Figure 7 is an enlarged view of area A in Figure 6;

Figure 8 is an enlarged view of area B in Figure 6;

Fig. 9 is a first schematic diagram of the relative rotation of the first traction pin and the second traction pin in the bogie provided by the embodiment of the present application;

Fig. 10 is a second schematic diagram of the relative rotation of the first traction pin and the second traction pin in the bogie provided by the embodiment of the present application;

Fig. 11 is the schematic diagram three of the relative rotation of the first traction pin and the second traction pin in the bogie provided by the embodiment of the present application;

Fig. 12 is a partial enlarged view of the bogie provided by the embodiment of the present application;

Fig. 13 is an exploded view of the traction device in the bogie provided by the embodiment of the present application;

Fig. 14 is a schematic structural view of the traction device in the bogie provided by the embodiment of the present application;

Fig. 15 is a partial longitudinal sectional view of the bogie provided by the embodiment of the present application;

Fig. 16 is a transverse sectional view of the bogie provided by the embodiment of the present application;

Fig. 17 is a top view of another bogie provided by the embodiment of the present application;

Fig. 18 is a cross-sectional view of a bogie provided by an embodiment of the present application with a speed detection device at the shaft end;

Fig. 19 is a schematic diagram of the axle end of the bogie provided by the embodiment of the present application.

Reference signs:

41-frame; 411-motor installation part;

421-axle; 422-wheel; 423-axle box;

431-the first traction pin; 4311-the first hinge part; 4312-the first hinge hole; 4313-the first car body connecting seat; 4314-through slot; 432-the second traction pin; 4321-the second hinge part; 4322 -Second hinge hole; 4323-Second car body connection seat; 433-Elastic connection pin; 4331-Keyway; 434-Hinge cover; 4341-Connection key; 435-Longitudinal buffer stop; ; 4361-guide rail; 437-transverse buffer stop;

44- primary suspension device;

45-Secondary suspension device;

461-drive motor; 462-gearbox; 4621-gearbox connecting arm; 463-coupling; 464-gearbox connecting rod; 465-buffer node; 4651-motor mounting seat; 4652-rubber sleeve; 466-rubber lining Cover; 467-connecting screw; 468-motor stopper;

471 - lateral shock absorber;

481-axle end adapter; 482-induction gear; 483-speed sensor; 484-axle end hinged rod; 485-axle end cover.

Detailed ways

In order to make the technical solutions and advantages in the embodiments of the present application clearer, the exemplary embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present application, and Not an exhaustive list of all embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

This embodiment provides a driving device that can be used in a bogie of a rail vehicle. The rail vehicle can be a diesel locomotive or an electric locomotive, and can be a normal-speed train, EMU, subway, light rail, etc.

In this embodiment, the vehicle length direction is called the longitudinal direction (Y direction), the vehicle width direction is called the transverse direction (X direction), and the vehicle height direction is called the vertical direction, vertical or vertical direction (Z direction).

The compact driving device provided in this embodiment includes: a gear box, a driving motor, and a coupling connected between the gear box and the driving motor; wherein, the gear box includes: a gear box body and a connecting arm, and one end of the connecting arm Fixed to the side of the gearbox casing facing the drive motor, the other end of the connecting arm extends obliquely outwards and is connected to the casing of the driving motor; a recessed space is formed between the connecting arms; the casing of the driving motor faces the gearbox One side of the drive motor is recessed inwardly to form a recessed space; the recessed space formed by the driving motor and the connecting arm form an accommodation space, and the coupling is arranged in the accommodation space.

Fig. 1 is a perspective view of the bogie provided by the embodiment of the present application, and Fig. 2 is a top view of the bogie provided by the embodiment of the present application. Taking the bogie shown in Figure 1 and Figure 2 as an example to describe the driving device in detail, the bogie provided in this embodiment includes: a frame, a wheel set, a traction device, a primary suspension device and a secondary suspension device.

Wherein, the frame 41 is the main structure of the bogie, which serves to bear the weight of the car body and provide connection interfaces for other components. The frame 1 includes: two side beams extending longitudinally and a cross beam arranged between the two side beams.

There are two wheel sets, which are respectively arranged under the ends of the side beams. The wheel set includes: an axle 421 , wheels 422 and axle boxes 423 symmetrically arranged on the axle 421 . The axle box 423 can be arranged on the inner side of the wheel, and can also be arranged on the outer side of the wheel. In the bogie shown in Fig. 1 and Fig. 2, the axle box 423 is arranged on the inner side of the wheel.

A series of suspension devices 44 are arranged between the end of the side beam and the axle box 423 for buffering the vertical force between the side beam and the axle box. The primary suspension device 44 can adopt rigid spring or rubber pile etc.

The secondary suspension device 45 is arranged on the frame, specifically, it can be arranged on the side beam, or on the cross beam.

The traction device is connected between the frame and the vehicle body, and is used for transmitting longitudinal traction force or braking force between the frame and the vehicle body.

Fig. 3 is a schematic structural view of the wheel set and the driving device in the bogie provided by the embodiment of the present application, Fig. 4 is a top view of the wheel set and the driving device in the bogie provided by the embodiment of the present application, and Fig. 5 is a schematic diagram of the wheel set and the driving device provided by the embodiment of the present application Schematic diagram of the structure of the gearbox in the bogie and the drive motor, and FIG. 6 is a cross-sectional view of the connection between the gearbox in the bogie and the drive motor provided by the embodiment of the present application. As shown in Fig. 3 to Fig. 6, a driving device is provided on the bogie, so that the bogie acts as a power bogie. The driving device includes: a driving motor 461 and a gear box 462 . Wherein, the gear box 461 includes: a box body and a driving gear and a driven gear arranged in the box body. The driving gear is a pinion, the driven gear is a bull gear, and the driven gear meshes with the driving gear. The driving gear can be connected with the output end of the driving motor through a coupling, and the driven gear is in interference fit with the axle, and the driving gear is driven to rotate by the driving motor, and then the driven gear drives the axle to rotate.

The case of the gearbox 462 is connected to the frame 41 . The casing of the driving motor 461 is connected with the casing of the gear box 462 , and the casing of the driving motor 461 is also connected to the frame 41 .

Specifically, the axial end of the driving motor 461 is inwardly recessed to form a concave structure, and the sides of the gear box 462 facing the driving motor are inclined outwards to extend out the gear box connecting arms 4621, and the gear box connecting arms 4621 are connected to the driving motor 461 through rubber nodes. The casings are connected, and the connecting arms 4621 of each gear box form a concave structure. The recessed structure formed by the driving motor 461 and the recessed structure formed by the gear box 462 enclose an accommodating space, and the coupling 463 is arranged in the accommodating space.

With the driving device provided in this embodiment, the gearbox casing is connected to the drive motor through the connecting arm, a recessed space is formed between the connecting arms, and the end of the housing of the driving motor also forms a recessed space, which is connected between the gearbox and the driving motor. The coupling between the gear box and the drive motor is located in the recessed space and no longer occupies the space between the gear box and the drive motor, which can reduce the distance between the gear box and the drive motor, make the structure compact, reduce the volume of the drive device, and further reduce the Occupies space, simplifies the design difficulty of the space between the bogie frame and the wheel set, and facilitates the arrangement of various equipment.

The above-mentioned coupling 463 can be a flexible coupling, such as a drum type gear coupling, which connects the shaft head of the gearbox and the shaft head of the motor to realize torque transmission. The drum-type gear coupling is adopted, which has a high load-carrying capacity, a large allowable angular displacement, and a high torque transmission capacity.

The number of gear box connecting arms 4621 is at least three, wherein two gear box connecting arms 4621 respectively extend upward to both sides of the vertical central plane of the drive motor 461, the vertical central plane is the axis passing through the drive motor 461 and along the vertical direction Extended plane: at least one connecting arm extends downwards to be lower than the horizontal central plane of the driving motor 461 , and the horizontal central plane is a plane passing through the axis of the driving motor 461 and extending along the horizontal direction.

One implementation: the number of gear box connecting arms 4621 is four, and two gear box connecting arms 4621 are located on the upper part of the gear box 462 and extend upward respectively; the other two gear box connecting arms 4621 are located on the lower part of the gear box 462, respectively Extend down. The four gearbox connecting arms 4621 are arranged axisymmetrically with respect to the vertical center plane of the driving motor, and the four gearbox connecting arms 4621 are arranged axisymmetrically with respect to the horizontal center plane of the driving motor. FIG. 7 is an enlarged view of area A in FIG. 6 . As shown in Figure 5 and Figure 7, the gearbox connecting arm 4621 is connected to the casing of the drive motor through a rubber node, and a rubber bushing 466 is arranged inside the rubber node, and the connection screw 467 is used to pass through the installation on the drive motor casing respectively. The mounting hole at the end of the hole and the gear box connecting arm 4621 is connected with a nut, and a rubber bushing 466 is sleeved between the connecting screw 467 and the mounting hole of the connecting arm, and the rubber bushing 466 can adjust the position between the motor and the gear box. The deviation is alleviated to a certain extent, and the displacement pressure of the coupling is reduced to a certain extent.

The gear box 462 is connected to the frame 41 using the gear box connecting rod 464 . Specifically, the bottom end of the gear box connecting rod 464 is connected to the housing of the gear box 462 through an elastic node, and the top end is connected to the frame 41 through an elastic node. A certain angle can be rotated between the gear box connecting rod 464 and the housing of the gear box 462 .

FIG. 8 is an enlarged view of area B in FIG. 6 . As shown in FIGS. 5 and 8 , the side of the housing of the drive motor 461 away from the axle 421 is connected to the frame 41 through a motor buffer node 465 . The motor buffer node 465 includes: a motor mount 4651 and two rubber sleeves 4652 . Wherein, the motor mount 4651 is fixed to the casing of the driving motor. The two rubber sleeves 4652 are arranged symmetrically up and down, with a certain gap between them. The frame 41 is provided with a motor mounting portion 411 , and two rubber sleeves 4652 are sandwiched between the upper and lower sides of the motor mounting portion 411 . The connecting screw rod 467 is adopted to pass through the rubber sleeve, the motor mounting part and the through hole provided on the motor mounting seat in sequence, and then be connected and fixed with the nut.

The connection mode of the motor buffer node 465 is used to achieve elastic suspension with the frame. When the frame undergoes ups and downs, the motor buffer node 465 can absorb part of the deformation, thereby reducing the displacement of the motor.

Further, as shown in FIG. 5 , the motor stopper 468 is used to fix on the frame 41 , and the motor stopper 468 is located below the motor buffer node 465 to prevent the driving motor from falling due to failure. The motor stopper 468 can adopt an L-shaped structure or a U-shaped structure, and the motor buffer node 465 is located inside it.

Because the driving motor 461 is connected with the frame 41, the driving motor 461 and the frame 41 rise and fall at the same time, while the gear box 462 is connected with the axle 421 and moves around the gear box connecting rod 464, thereby forming a displacement between the driving motor 461 and the gear box 462 deviation. In this embodiment, the number of gear box connecting arms 4621 is four, and the four gear box connecting arms 4621 are semi-rigidly connected to the casing of the driving motor 461 through rubber nodes, and the rubber nodes can absorb a part of the displacement between the motor and the gear box Therefore, the requirement for the displacement capability of the coupling is reduced, so that the outline size of the coupling can be reduced to fit the compact space limitation of the bogie built into the axle box.

This embodiment also provides an implementation manner of a traction device: the above traction device includes: a first traction pin 431 and a second traction pin 432 . The bogie provided in this embodiment is arranged between two carriages so that the two carriages share one bogie. The first traction pin 431 is connected with one compartment, and the second traction pin 432 is connected with the other compartment. The first traction pin 431 and the second traction pin 432 are rotationally connected, and the first traction pin 431 cooperates with the beam to transmit longitudinal force, the longitudinal force includes traction force and braking force, and the longitudinal force is transmitted to the carriage through the wheel set, the frame, and the traction pin in turn.

The bogie provided by this embodiment adopts the first traction pin and the second traction pin connected in rotation, and the first traction pin and the second traction pin are respectively used to connect with two adjacent compartments; the first traction pin cooperates with the beam to transmit Longitudinal force, the bogie is connected between two carriages, and the two carriages share a bogie, which can reduce the number of bogies, thereby reducing the weight of the vehicle, and is conducive to improving traction efficiency.

In addition, the rotation connection between the first traction pin and the second traction pin can also adapt to the relative displacement of the two carriages in the lateral direction during the turning process of the vehicle, so as to ensure that the vehicle passes through the curve smoothly.

Figure 9 is a first schematic diagram of the relative rotation of the first traction pin and the second traction pin in the bogie provided by the embodiment of the present application, and Figure 10 is the relative rotation of the first traction pin and the second traction pin in the bogie provided by the embodiment of the present application Figure 11 is the third schematic diagram of the relative rotation of the first traction pin and the second traction pin in the bogie provided by the embodiment of the present application.

The first traction pin 431 and the second traction pin 432 are rotationally connected in a variety of ways, for example: the first traction pin 431 and the second traction pin 432 are rotationally connected between the first traction pin 431 and the second traction pin 432, so that the first traction pin 431 and the second traction pin The two traction pins 432 can rotate in the plane formed by the length and width of the vehicle, so as to adapt to the horizontal deflection angle between the two compartments, so that the vehicle can pass through the curve smoothly, and the maximum angle α can reach 13°, as shown in Figure 9 .

The first traction pin 431 and the second traction pin 432 can also be rotated in the plane formed by the vehicle width and vehicle height, so as to adapt to the situation of different rail heights on both sides, avoid vehicle rollover, and improve driving safety. The first traction pin 431 The included angle β with the second traction pin 432 can reach a maximum of 4°, as shown in FIG. 10 .

The first traction pin 431 and the second traction pin 432 can also rotate in the plane formed by the length of the vehicle and the height of the vehicle to adapt to the different heights between the two wheelsets in the bogie, so that the vehicle can pass through uneven roads smoothly , to ensure driving safety, the angle θ between the first traction pin 431 and the second traction pin 432 can reach a maximum of 1.5°, as shown in FIG. 11 .

For the above traction device, this embodiment provides an implementation:

Figure 12 is a partial enlarged view of the bogie provided by the embodiment of the present application, Figure 13 is an exploded view of the traction device in the bogie provided by the embodiment of the present application, and Figure 14 is the structure of the traction device in the bogie provided by the embodiment of the present application Schematic diagram, Fig. 15 is a partial longitudinal sectional view of the bogie provided by the embodiment of the present application. As shown in FIG. 12 to FIG. 15 , the elastic connecting pin 433 includes: a central shaft, an elastic middle sleeve and an annular outer sleeve. Wherein, the central shaft and the annular outer casing are made of rigid materials, such as metal. The elastic middle sleeve is made of a material with a certain elastic deformation capacity, such as rubber. The elastic middle sleeve is arranged between the central shaft and the annular outer sleeve, and adopts an integrated structure formed by vulcanizing rubber and inner and outer metal layers. The central shaft is connected with the second traction pin 432 , and the annular outer sleeve is connected with the first traction pin 431 .

The use of elastic intermediate sleeves can realize the relative rotation between the central shaft and the annular outer sleeve along the X direction, Y direction and Z direction, and then realize that the first traction pin 431 and the second traction pin 432 can rotate along the X direction, Y direction and Z direction. Rotate relative to each other.

The upper side of the first traction pin 431 is provided with a first hinge portion 4311, and the first hinge portion 4311 defines a first hinge hole 4312, and the center line of the first hinge hole 4312 extends along the transverse direction. The elastic connecting pin 433 is passed through the first hinge hole 4312 , specifically, the annular sleeve is press-fitted in the first hinge hole 4312 .

The other side of the top of the first traction pin 431 is provided with a first car body connecting seat 4313, the first car body connecting seat 43123 is a plate-shaped structure, connected to the car body of the compartment by a threaded fastener, for example, can be connected to the car body. end of the chassis of the body. The first traction pin 431 has a T-shaped structure as a whole.

One side of the second traction pin 432 is provided with a second car body connection seat 4323, which is a plate-shaped structure, connected to the car body of another compartment by a threaded fastener, for example, can be connected to the end of the chassis of the car body .

The other side of the second traction pin 432 is provided with two second hinged parts 4321, and the two second hinged parts 4321 are perpendicular to the second car body connection seat 4323, and the two are arranged opposite to each other, leaving a certain distance between them . Each second hinge portion 4321 defines a second hinge hole 4322 . The second traction pin 432 has a U-shaped structure as a whole.

The first hinge part 4311 is interposed between the two second hinge parts 4321 , and the two ends of the central axis pass through the second hinge hole 4322 and are fixed to the second hinge part 4321 .

Further, a hinged cover 434 is used to connect to the outer surface of the second hinged portion 4321 and align with the second hinged hole 4322 . The hinged cover 434 is triangular in shape, and its three corners are fixed to the outer surface of the second hinged part 4321 by threaded fasteners. A connecting key 4341 protrudes from the inner surface of the hinged cover 434 facing the second hinged portion 4321 , and a key groove 4331 for accommodating the connecting key 4341 is provided on the end surface corresponding to the central axis. The connecting key 4341 is inserted into the key groove 4331, which can limit the rotation of the central shaft, realizes fixing the central shaft to the second traction pin 431, and plays a role of preventing loosening.

Of course, the above solution is not the only way to realize it, and the two ends of the central shaft can also be press-fitted into the second hinge hole 4322 to replace the way of matching the connecting key and the keyway.

The bottom end of the first traction pin 431 cooperates with the beam to transmit the longitudinal force. One way of implementation is: the middle part of the crossbeam is provided with a through hole penetrating up and down, and the bottom end of the first traction pin 431 is inserted into the through hole. The longitudinal buffer stops 435 are arranged in the through holes and respectively located between the first traction pin 431 and the beam. The longitudinal buffer stopper 435 can be vulcanized by an outer layer of metal and an inner layer of rubber, and can be fixed to the crossbeam by a threaded fastener, or can be fixed to the side wall of the first traction pin 431, and is used for aligning the first traction pin. The rigid force between the beam and the beam is buffered.

Another way of realization: the number of beams can be two, and they are connected side by side between two side beams. The bottom end of the first traction pin 431 is inserted between the two beams, and a longitudinal buffer stopper is provided between the first traction pin 431 and the corresponding side beam.

Further, a lateral buffer stopper 437 is provided between the traction device and the frame, which is used to buffer the lateral force between the traction device and the frame, and can also limit excessive lateral displacement between the vehicle body and the frame. Specifically, the lateral buffer stopper 437 is fixed to the outer surface of the second hinged part 4321 in the second traction pin 432 through a threaded machine fastener. Lateral buffer stops 437 are provided on the outer surfaces of the two second hinge parts 4321 . When the vehicle is going straight, a certain gap is reserved between the lateral buffer stopper 437 and the frame. When the vehicle passes through a curve, the lateral buffer stopper 437 on one side contacts the frame to avoid a larger gap between the vehicle body and the frame. lateral displacement.

Fig. 16 is a transverse sectional view of the bogie provided by the embodiment of the present application. As shown in Figures 13, 14, and 16, on the basis of the above-mentioned technical solutions, the bogie can also include a lateral shock absorber 471, which is connected between the frame and the traction device, and is used to reduce the lateral force between the traction device and the frame. to buffer.

This embodiment provides an implementation manner: the lateral shock absorber mount 436 is used to connect to the bottom end of the first traction pin 431 . One end of the transverse shock absorber 471 is connected to the transverse shock absorber mount 436 , and the other end is connected to the frame 41 .

Specifically, the transverse shock absorber mount 436 includes: a top plate of the shock absorber mount and a side plate of the shock absorber mount. Wherein, the top plate of the shock absorber mounting seat extends along the horizontal direction, and is connected to the bottom surface of the first traction pin through four threaded fasteners. The side plate of the shock absorber mounting seat extends vertically and is arranged side by side on the lower surface of the top plate of the shock absorber mounting seat. A gap is reserved between the two side plates of the shock absorber mounting seat to accommodate the end of the transverse shock absorber; The side end surface of the side plate of the vibrator mounting seat is connected with the transverse vibration damper through threaded fasteners.

Further, the bottom surface of the first traction pin 431 is provided with a through slot 4314 extending along the transverse direction. Correspondingly, a guide rail 4361 that can slide in the through groove protrudes from the top surface of the shock absorber mounting seat top plate. The guide rail 4361 is inserted into the guide rail 4361 along the transverse direction, and then the transverse shock absorber mounting seat 436 is connected to the first traction pin 431 along the vertical direction through the threaded fastener. The cooperation between the through slot and the guide rail is used to limit the longitudinal movement between the first traction pin and the mounting seat of the transverse shock absorber.

Fig. 17 is a top view of another bogie provided by the embodiment of the present application. As shown in FIG. 17 , on the basis of the above technical solution, a speed detection device may also be used to detect the rotational speed of the axle. Specifically, the speed detection device includes: a speed detection component and a speed sensor. Wherein, the speed detection assembly is fixedly arranged at the end of the axle 421 and rotates synchronously with the axle 421 . The speed sensor is arranged on the inner wall of the axle box 423, and is used for cooperating with the speed detection component to measure the driving speed of the vehicle.

Fig. 18 is a cross-sectional view of a bogie provided by an embodiment of the present application provided with a speed detection device at the axle end, and Fig. 19 is a schematic diagram of the axle end of the bogie provided by the embodiment of the present application. As shown in FIGS. 18 and 19 , the speed detection assembly includes an axle end adapter 481 , an induction gear 482 and an axle end cover 485 . Wherein, the axle end cover 485 is connected to the frame 41 through the axle end hinge rod 484 .

One axial end of the shaft end adapter 481 is connected to the end surface of the axle 421 through a threaded fastener, and rotates synchronously with the axle 421 . The induction gear 482 is connected to the other axial end of the shaft end adapter 481 through a threaded fastener, and the induction gear 482 rotates synchronously with the axle 421 . The induction gear 482 is connected with the axle end cover 485 through a bearing, so that the axle 421 , the axle end adapter 482 and the induction gear 482 rotate relative to the axle box. The axle end cover 485 has a U-shaped structure, covering the induction gear and the bearing inside for protection.

The speed sensor 483 is arranged on the inner side of the axle box cover 4231 , and its detecting end faces the induction gear 482 . The speed sensor 483 is a pulse signal generator, which generates an electric pulse signal whose frequency is proportional to the running speed. N (the number of teeth of the induction gear) pulse signals are generated for each revolution of the axle. The end of the speed sensor 483 is kept at a distance of about 1 mm from the tooth top of the induction gear 482 . When the induction gear 482 rotates, the tooth top and the tooth valley alternately pass through the sensor to cut the magnetic force line, and the speed sensor 483 induces and outputs a corresponding pulse signal to detect the running speed of the vehicle.

As shown in FIG. 19, the speed sensor 483 is inserted into the axle box cover from the outside. The axlebox cover is also connected to frame 41 by axle-end hinged rods 484 .

On the basis of the above-mentioned technical solution, the length of the beam is greater than the distance between the two side beams, and the part of the beam extending to the outside of the side beam is provided with a secondary connection structure for connecting with the secondary suspension device 45. The quantity of the secondary suspension device 45 is four, and two secondary suspension devices 45 are arranged on one end of the crossbeam as a group; two secondary suspension devices 45 positioned at the same end of the crossbeam are arranged at intervals along the longitudinal direction. The secondary suspension device 45 may be an air spring.

This embodiment also provides a rail vehicle, including: the bogie provided by any of the solutions above. The rail vehicle provided by this embodiment has the same technical effect as the above bogie.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "front", "rear", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of It is convenient to describe the application and simplify the description, but not to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, unless otherwise clearly defined and limited, terms such as "installation" and "connection" should be understood in a broad sense; taking connection as an example, it can be directly connected or indirectly connected through an intermediary, and can be two The communication within a component or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

While a few alternative embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be interpreted to cover some alternative embodiments as well as all changes and modifications that fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A compact driving device, characterized in that it includes: a gear box, a drive motor, and a coupling connected between the gear box and the drive motor;

The gear box includes: a gear box body and a connecting arm, one end of the connecting arm is fixed to the side of the gear box body facing the driving motor, and the other end of the connecting arm extends obliquely outwards and is connected to the housing of the driving motor on; a recessed space is formed between the connecting arms;

The casing of the driving motor is recessed inwardly toward the side of the gear box to form a recessed space; the recessed space of the driving motor and the recessed space formed by the connecting arm enclose an accommodation space, and the coupling is arranged in the accommodation space.
The driving device according to claim 1, wherein the coupling is a flexible coupling.
The driving device according to claim 2, wherein the number of the connecting arms is at least three, wherein two connecting arms respectively extend upward to both sides of the vertical central plane of the driving motor, and the vertical central plane is a plane passing through the axis of the drive motor and extending vertically; at least one connecting arm extends downward to be lower than the horizontal center plane of the drive motor, and the horizontal center plane is a plane passing through the axis of the drive motor and extending in the horizontal direction.
The driving device according to claim 3, characterized in that, the number of the connecting arms is four, two connecting arms are located at the upper part of the gear box, respectively extending upward; the other two connecting arms are located at the lower part of the gear box, respectively Extend down.
The driving device according to claim 4, wherein the four connecting arms are arranged axisymmetrically with respect to the vertical central plane of the driving motor, and the four connecting arms are arranged axisymmetrically with respect to the horizontal central plane of the driving motor.
The driving device according to claim 3, 4 or 5, wherein the connecting arm is connected to the casing of the driving motor through a rubber node; rubber bushings are arranged inside the rubber node, and connecting screws are used to respectively pass through the driving motor. The mounting hole on the machine housing and the mounting hole at the end of the connecting arm of the gear box are connected with the nut.
The driving device according to claim 1, further comprising: a gear box connecting rod; the bottom end of the gear box connecting rod is connected with the housing of the gear box through an elastic node, and the top end is connected with the bogie through an elastic node. The frame is connected.
The driving device according to claim 1, further comprising: a motor buffer node, arranged on the housing of the drive motor, for connecting with the frame of the bogie; the motor buffer node includes: a motor mounting base and two Rubber sleeve; the motor mounting seat is fixed to the casing of the driving motor; the two rubber sleeves are symmetrically arranged up and down, sandwiched on the upper and lower sides of the motor mounting part set on the frame; the connecting screw is used to pass through the rubber sleeve and the motor mounting part in turn After being connected with the through hole provided on the motor mount, it is connected and fixed with the nut.
A bogie, characterized by comprising: the compact driving device according to any one of claims 1-8.
A rail vehicle, characterized by comprising: the bogie according to claim 9.