CN111605567A - A gear box transmission system for bogie and bogie - Google Patents

Abstract

Embodiments of the present application provide a gear box transmission system for a bogie and a bogie. The gear box transmission system includes: a first direction-changing transmission device, which is drivingly connected with the first axle of the same bogie; a second direction-changing transmission device, which is drivingly connected with the second axle of the same bogie; A direction-changing transmission device and a second direction-changing transmission device; a single-shaft input transmission device, fixed with the first direction-changing transmission device, for receiving external power and outputting it to the first direction-changing transmission device in parallel; the first direction-changing transmission device After changing the direction of the received power, it is output to the first axle, and the first direction-changing transmission device also transmits the received power to the second direction-changing transmission device through the universal drive shaft, and the second direction-changing transmission device is used to receive The received power is output to the second axle after changing direction. The bogie includes the gearbox transmission system described above. The embodiments of the present application solve the technical problems of complex structure and installation of the existing gearbox transmission system.

Description

A gear box transmission system for bogie and bogie

technical field

The present application relates to the technical field of railway maintenance machinery design and manufacture, and in particular, to a gear box transmission system for a bogie and a bogie.

Background technique

Domestic railway engineering vehicles use internal combustion power, hydraulic power, hydrostatic traction drive or electric traction drive, which requires an axle gearbox to transmit the power source to the wheels of the bogie wheelset. Axle gearboxes are key components of railway engineering vehicles.

Most railway engineering vehicles have multiple bogies, and each bogie has two wheel pairs. In order to avoid the slippage of the driving wheel pairs when the vehicle starts and runs, and considering the limitation of vehicle adhesion, most of the vehicles need to drive two wheels at the same time. Wheel.

At present, the gearbox transmission system for railway engineering vehicles adopts a single-stage transmission, and each axle is installed with a set of independent transmission axle gearbox. Input, use cost is high, structure and installation are complex, need larger layout space. Therefore, the layout form of railway engineering vehicles with a compact layout cannot meet the actual needs.

Therefore, the structure and installation of the existing gearbox transmission system are complex, which is a technical problem that those skilled in the art urgently need to solve.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a gear box transmission system for a bogie and a bogie, so as to solve the technical problems of complex structure and installation of the existing gear box transmission system.

The embodiment of the present application provides a gear box transmission system for a bogie, including:

a first direction-changing transmission device, which is used for drivingly connecting with the first axle of the same bogie;

The second direction-changing transmission device is used for drivingly connecting with the second axle of the same bogie;

a universal drive shaft, connecting the first change-of-direction transmission device and the second change-of-direction transmission device;

a single-shaft input transmission device, fixed to the first direction-changing transmission device, for receiving external power and outputting it to the first direction-changing transmission device in parallel;

Wherein, the first direction-changing transmission device is used to change the direction of the received power and output it to the first axle, and the first direction-changing transmission device is also used to transmit the received power through the universal transmission The shaft is transmitted to the second direction changing transmission device, and the second direction changing transmission device is used for changing the direction of the received power and outputting the second axle.

The embodiments of the present application also provide the following technical solutions:

A bogie, comprising the above-mentioned gearbox transmission system.

Due to the adoption of the above technical solutions, the embodiments of the present application have the following technical effects:

The first and second direction-changing transmissions are correspondingly connected to the first and second axles of the same bogie, and the first and second direction-changing transmissions are connected through a universal drive shaft. , the single-shaft input transmission device is fixed with the first direction-changing transmission device. The single-shaft input transmission device receives external power and outputs it in parallel to the first direction-changing transmission device, that is, the input of the power is a single-shaft input. The first reverse transmission device, on the one hand, outputs a part of the received power to the first axle of the bogie to drive one wheel to rotate, and on the other hand, transmits the other part of the received power to the second through the universal drive shaft. The direction change transmission device, the second direction change transmission device changes the direction of the received power and outputs it to the second axle to drive the other wheel to rotate, that is, the output is two, and the two axles are driven at the same time. The existence of the universal joint shaft makes it possible to transmit power reliably even when the angle and distance between the first axle and the second axle of the same bogie change. The gear box transmission system for the bogie according to the embodiment of the present application can realize the single-axis input of power, and the first axle and the second axle of the bogie are driven simultaneously, so that the structure and installation of the gear box transmission system are simple. It is suitable for bogies, especially for the bogies of railway engineering vehicles with compact layout.

Description of drawings

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

FIG. 1 is a partial structural side view of the gear box transmission system for a bogie and the installation of two wheel sets of the bogie according to an embodiment of the application;

FIG. 2 is a side view showing the gearbox transmission system shown in FIG. 1 and the two wheel sets of the bogie, and showing the first gearbox housing and the second gearbox housing;

Figure 3 is a top view of the gearbox transmission system shown in Figure 1;

FIG. 4 is a system topology diagram of a bogie according to an embodiment of the present application.

Description of reference numbers:

100 The first direction change transmission device, 110 The first large bevel gear, 120 The first small bevel gear shaft,

200 second direction change transmission device, 210 second large bevel gear, 220 second small bevel gear shaft,

3 million universal drive shaft,

400 single shaft input transmission, 410 output spur gear, 420 input spur gear,

430 spur gear shaft, 440 input flange,

500 first gear box case, 510 input first rolling bearing, 520 input second rolling bearing,

600 second gearbox case,

710 is the first rolling bearing at the transmission end, and 720 is the second rolling bearing at the transmission end.

Detailed ways

In order to make the technical solutions and advantages of the embodiments of the present application more clear, the exemplary embodiments of the present application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and Not all embodiments are exhaustive. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

The gear box transmission system for a bogie according to the embodiment of the present application is suitable for a bogie of a rail vehicle, and is especially suitable for a bogie of a railway engineering vehicle with a compact layout.

Example 1

1 is a partial structural side view of the gearbox transmission system for a bogie and two wheelsets of the bogie according to an embodiment of the application; FIG. 2 is the gearbox transmission system shown in FIG. 1 and two of the bogie The wheelset is installed and a side view of the first and second gearbox housings is shown; FIG. 3 is a top view of the gearbox transmission system shown in FIG. 1 .

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the gearbox transmission system for the bogie according to the embodiment of the present application includes:

The first direction-changing transmission device 100 is used for drivingly connecting with the first axle of the same bogie;

The second direction-changing transmission device 200 is used for drivingly connecting with the second axle of the same bogie;

a universal drive shaft 300, connecting the first direction changing transmission device 100 and the second direction changing transmission device 200;

a single-shaft input transmission device 400, fixed to the first direction-changing transmission device 100, for receiving external power and outputting it in parallel to the first direction-changing transmission device;

Wherein, the first direction-changing transmission device 100 is used to change the direction of the received power and output it to the first axle, and the first direction-changing transmission device 100 is also used to transmit the received power through the universal The transmission shaft 300 is transmitted to the second direction changing transmission device 200, and the second direction changing transmission device 200 is used for changing the direction of the received power and outputting the second axle.

The bogie has two wheelsets, each with an axle and two wheels. In the gearbox transmission system for a bogie according to the embodiment of the present application, the first direction-changing transmission device and the second direction-changing transmission device are correspondingly connected to the first axle and the second axle of the same bogie, and the first direction-changing transmission device It is connected with the second direction-changing transmission device through a universal transmission shaft, and the single-shaft input transmission device is fixed with the first direction-changing transmission device. The single-shaft input transmission device receives external power and outputs it in parallel to the first direction-changing transmission device, that is, the input of the power is a single-shaft input. The first reverse transmission device, on the one hand, outputs a part of the received power to the first axle of the bogie to drive one wheel to rotate, and on the other hand, transmits the other part of the received power to the second through the universal drive shaft. The direction change transmission device, the second direction change transmission device changes the direction of the received power and outputs it to the second axle to drive the other wheel to rotate, that is, the output is two, and the two axles are driven at the same time. The existence of the universal joint shaft makes it possible to transmit power reliably even when the angle and distance between the first axle and the second axle of the same bogie change. The gear box transmission system for the bogie according to the embodiment of the present application can realize the single-axis input of power, and the first axle and the second axle of the bogie are driven simultaneously, so that the structure and installation of the gear box transmission system are simple. It is suitable for bogies, especially for the bogies of railway engineering vehicles with compact layout.

About the structure of the first change-of-direction transmission and the second change-of-direction transmission.

In practice, the first direction-changing transmission device and the second direction-changing transmission device have the same structure, and each includes:

The large bevel gear is used for being sleeved and fixed on the outer peripheral surface of the axle of the same bogie; wherein, the axle includes a first axle and a second axle;

The small bevel gear shaft and the large bevel gear are driven by a bevel gear, and the two axes of the large bevel gear and the small bevel gear shaft intersect, so that the large bevel gear and the small bevel gear shaft have their respective direction of rotation;

Wherein, both ends of the universal drive shaft are respectively fixedly connected with the two pinion bevel gear shafts.

Bevel gear transmission is used to transmit motion and power between two intersecting shafts. The bevel gear is driven between the large bevel gear and the small bevel gear shaft, which realizes the transmission of the rotation of the small bevel gear shaft into the rotation of the large bevel gear and changes the direction of rotation. The existence of the universal joint shaft enables reliable transmission of power even when the angle and distance between the two pinion bevel gear shafts change.

In implementation, as shown in FIG. 1 , FIG. 2 and FIG. 3 , the axes of the first large bevel gear 110 and the first small bevel gear shaft 120 are coplanar; wherein, the first large bevel gear 110 and the first small bevel gear 110 are The bevel gear shaft 120 is the large bevel gear and the small bevel gear shaft of the first direction change transmission device;

The axes of the second large bevel gear 210 and the second small bevel gear shaft 220 are coplanar; wherein, the second large bevel gear 210 and the second small bevel gear shaft 220 are the large shafts of the second direction-changing transmission device Bevel and pinion gear shafts.

The first large bevel gear and the first small bevel gear shaft whose axes are coplanar, the first direction changing transmission device has a higher transmission ratio and higher transmission efficiency; the second large bevel gear and the second small bevel gear shaft whose axes are coplanar, The transmission ratio of the second direction-changing transmission device is high, and the transmission efficiency is high.

Specifically, the intersection angle between the two shafts of the large bevel gear and the small bevel gear shaft is equal to 90 degrees.

In this way, the rotation direction of the pinion bevel gear shaft and the rotation direction of the large bevel gear are perpendicular to each other, that is, a 90-degree rotation of the rotation direction is realized.

Specifically, the large bevel gear and the small bevel gear shaft respectively have helical teeth, so as to realize the bevel gear transmission of the large bevel gear and the small bevel gear shaft.

The bevel gear transmission is realized between the large bevel gear and the small bevel gear shaft through helical teeth, so that the transmission is stable.

About the structure of the universal joint shaft.

In implementation, the universal drive shaft is a universal drive shaft with a telescopic function, so as to adapt to changes in the distance between two axles of the same bogie.

The two axles of the bogie each have six degrees of freedom relative motion. By using a universal drive shaft with a telescopic function to connect the two axles, the decoupling between the motions of the two axles is realized and the first direction change transmission caused by the relative motion is avoided. An additional internal force is generated between the device and the second direction changing transmission device to shorten the service life of the first direction changing transmission device and the second direction changing transmission device.

Regarding the structure of the single-shaft input transmission.

In implementation, as shown in Figure 1, Figure 2 and Figure 3, the single-shaft input transmission device includes:

The output spur gear 410 is sleeved and fixed on the outer peripheral surface of the first pinion bevel gear shaft 110;

The input spur gear 420 and the output spur gear 410 are spur gear transmission, and the two axes of the input spur gear 420 and the output spur gear 410 are parallel so that the input spur gear 420 and the output spur gear 410 The rotation direction of 410 is the same;

Input flange 440 for connecting with external power;

A cylindrical gear shaft 430, one end of the cylindrical gear shaft 430 is fixed to the input flange 440, and the other end is fixed to the inner hole of the input cylindrical gear.

In this way, the single-shaft input transmission device can receive external power and output it in parallel to the first bevel pinion shaft. Specifically, the external power is input from the input flange, through the spur gear shaft, the input spur gear and the output spur gear are parallelly driven and output to the first pinion bevel gear shaft; then the power received by the first pinion bevel gear shaft will be Part of the transmission is transmitted to the first large bevel gear, the first pinion bevel gear shaft and the first large bevel gear change direction during transmission and output to the first axle of the bogie to drive one wheel to rotate, on the other hand, the received power will be the other one. A part of the power is transmitted to the second pinion bevel gear shaft through the universal drive shaft, and the second pinion bevel gear shaft and the second large bevel gear change direction during transmission and output to the second axle to drive another wheel to rotate.

Specifically, the spur gear shaft is located on the first pinion bevel gear shaft, and the spur gear shaft and the first pinion bevel gear shaft are parallel to each other.

In this way, the parallelism of the cylindrical gear shaft and the first pinion bevel gear shaft is realized, and the cylindrical gear transmission of the input cylindrical gear and the output cylindrical gear is realized, and the rotation directions of the input cylindrical gear and the output cylindrical gear are consistent.

Specifically, there is an interval between the cylindrical gear shaft and the first large bevel gear.

In this way, the spur gear shaft is not located directly above the first pinion bevel gear shaft, but is offset away from the first large bevel gear to avoid the spur gear shaft, the input flange and the first large bevel gear. interference occurs.

In practice, the life of the large bevel gear > the life of the small bevel gear shaft > the life of the output spur gear > the life of the input spur gear, and the life of the input spur gear = the gearbox transmission The preset lifetime of the system.

In this way, within the preset life of the gearbox transmission system, the large bevel gear, the small bevel gear shaft, and the output cylindrical gear do not need to be replaced, which reduces the damage of the large bevel gear and the small bevel gear shaft, resulting in high maintenance costs. , replace the troublesome technical problems.

In implementation, the first large bevel gear and the second large bevel gear are respectively located on both sides of the universal drive shaft.

In this way, the structural distribution of the entire gearbox transmission system is relatively balanced, which is beneficial to the transmission of motion and power in the gearbox transmission system. The structural layout of the entire gearbox transmission system is reasonable, easy to maintain, and easy to install and bogie.

The total speed ratio of the gearbox transmission system is the product of the speed ratio of the variable-direction transmission and the speed ratio of the single-shaft input transmission. , can realize the change of the speed ratio of the single-shaft input transmission device, and then realize the change of the total speed ratio of the gearbox transmission system. That is to say, under the condition that the speed ratio of the variable-direction transmission device remains unchanged, the gearbox transmission system is equipped with a single-shaft input transmission device with different speed ratios, which can realize the diversification of the total speed ratio of the gearbox transmission system and can adapt to diverse needs. .

Embodiment 2

The bogie of the embodiment of the present application includes the gearbox transmission system described in the first embodiment. The bogie of the embodiment of the present application also has the following characteristics:

In implementation, as shown in Figure 2, the bogie also includes:

The first gear box case 500 is used for connecting with the frame of the bogie; the first direction-changing transmission device 100 and the single-shaft input transmission device 400 are installed in the first Inside the gear box;

A first rolling bearing 510 at the input end, the inner ring of the first rolling bearing 510 at the input end is fixed at the position where the cylindrical gear shaft 430 is located between the input flange 440 and the input cylindrical gear 420, the input end The outer ring 510 of the first rolling bearing is fixed with the first gearbox casing 500;

The input end second rolling bearing 520, the inner ring of the input end second rolling bearing 520 is fixed at the position where the spur gear shaft 430 protrudes from one side of the input spur gear, the outer ring of the input end second rolling bearing 520 It is fixed with the first gear box case 500 .

The first gear box case is the installation base of the first variable-direction transmission and the single-shaft input transmission. Both ends of the cylindrical gear shaft are connected to the first gear box case through the first rolling bearing at the input end and the second rolling bearing at the input end respectively, so that the cylindrical gear shaft is connected at both ends in the length direction, the force is relatively balanced, and the installation is relatively easy. Stable, that is, the installation of the single-shaft input transmission device is realized; at the same time, the rotation of the cylindrical gear shaft can be realized.

In implementation, as shown in Figure 2, the bogie also includes:

The two transmission end first rolling bearings 710, the inner rings of the two transmission end first rolling bearings 710 are respectively fixed on both ends of the first pinion bevel gear shaft 120, and the outer rings of the two transmission end first rolling bearings 710. The rings are respectively fixed to the first gearbox case 500 .

Both ends of the first pinion bevel gear shaft are connected to the first gear box case through two first rolling bearings at the transmission end respectively, so that the first pinion bevel gear shaft is connected at both ends in the length direction, and the force is relatively balanced. It is also relatively stable, that is, the installation of the first direction-changing transmission device is realized; at the same time, the rotation of the first pinion bevel gear shaft can be realized.

In implementation, as shown in Figure 2, the bogie also includes:

The second gear box case 600 is used for connecting with the frame of the bogie; the second direction changing transmission device 200 is installed in the second gear box case 600;

Two transmission end second rolling bearings 720, the inner rings of the two transmission end second rolling bearings 720 are respectively fixed on both ends of the second pinion bevel gear shaft 220, and the outer rings of the two transmission end second rolling bearings 720 are respectively fixed. The rings are respectively fixed to the second gearbox case 600 .

Both ends of the second pinion bevel gear shaft are connected to the second gear box case through two second rolling bearings at the transmission end respectively, so that the second pinion bevel gear shaft is connected at both ends in the length direction, and the force is relatively balanced. It is also relatively stable, that is, the installation of the second direction changing transmission device is realized; at the same time, the rotation of the second pinion bevel gear shaft can be realized.

The above is the connection between the first gear box case, the second gear box case and the gear box transmission system.

FIG. 4 is a system topology diagram of a bogie according to an embodiment of the present application. Next, the frame and wheelset of the first gear box housing and the second gear box housing and the bogie will be described.

In implementation, as shown in FIG. 4 , the first gear box body 500 is connected to the frame of the bogie. The frame of the bogie has six degrees of freedom; among them, the six degrees of freedom of the first gear box body refers to the movement along the longitudinal direction, the lateral direction, the vertical direction, the rotation around the longitudinal direction (rolling), and the rotation around the lateral direction. Rotate (nod), rotate around the vertical (shake).

In implementation, as shown in FIG. 4 , the second gear box body 600 is connected to the frame of the bogie. The frame of the bogie has six degrees of freedom.

In implementation, as shown in FIG. 4 , the first gear box 500 is directly installed on the first axle of the first wheelset of the bogie through rolling bearings, and the first axle can rotate; the second gear box is used to pass the rolling bearing. Directly mounted on the second axle of the second wheelset of the bogie, the second axle is rotatable.

In practice, the frame of the bogie is connected to the two wheel sets of the bogie. As an optional way, the frame of the bogie is connected to the first wheelset and the second wheelset through a vibration damping device and a wheelset axle box, and there are six degrees of freedom between them.

In the description of the present application and its embodiments, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "height", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the purpose of It is convenient to describe the application and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the application.

In the present application and its embodiments, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be fixed The connection can also be a detachable connection or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components or the interaction of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application and its embodiments, unless otherwise expressly specified and limited, the first feature "on" or "under" the second feature may include direct contact between the first and second features, or may include the first feature. and the second feature is not in direct contact but through another feature between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level less than the second feature.

The above disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described above. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

While the preferred embodiments of the present application have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of this application.

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

Claims (15)

1. A gearbox drive system for a bogie, comprising:

the first direction-changing transmission device is used for being in transmission connection with a first axle of the same bogie;

the second direction-changing transmission device is used for being in transmission connection with a second axle of the same bogie;

the universal transmission shaft is connected with the first direction-changing transmission device and the second direction-changing transmission device;

the single-shaft input transmission device is fixed with the first direction-changing transmission device and used for receiving external power and outputting the external power to the first direction-changing transmission device in parallel;

the first direction-changing transmission device is used for changing the direction of the received power and outputting the power to the first axle, the first direction-changing transmission device is also used for transmitting the received power to the second direction-changing transmission device through the universal transmission shaft, and the second direction-changing transmission device is used for changing the direction of the received power and outputting the power to the second axle.

2. A gearbox drive system as set forth in claim 1 wherein said first direction change drive and said second direction change drive are identically configured, each comprising:

the large bevel gear is used for being fixedly sleeved on the outer peripheral surface of the axle of the same bogie; wherein the axle comprises a first axle and a second axle;

the bevel gear shaft and the large bevel gear are in bevel gear transmission, and two shafts of the large bevel gear and the small bevel gear shaft are intersected so that the large bevel gear and the small bevel gear shaft have respective rotating directions;

and two ends of the universal transmission shaft are respectively and fixedly connected with the two bevel pinion shafts.

3. A gearbox drive system as defined in claim 2, wherein the first large bevel gear and the first small bevel gear shaft axis are coplanar; wherein the first large bevel gear and the first small bevel gear shaft are large bevel gears and small bevel gear shafts of the first direction changing transmission;

the axes of the second large bevel gear and the second small bevel gear are coplanar; wherein the second large bevel gear and the second small bevel gear shaft are large bevel gear and small bevel gear shafts of the second direction changing transmission.

4. A gearbox drive system as claimed in claim 3, wherein the universal drive shaft is a telescopic universal drive shaft to accommodate changes in the distance between two axles of the same bogie.

5. A gearbox drive system as defined in claim 4, wherein the single shaft input drive comprises:

the output cylindrical gear is fixedly sleeved on the peripheral surface of the first bevel pinion shaft;

the input cylindrical gear and the output cylindrical gear are in cylindrical gear transmission, and the two shafts of the input cylindrical gear and the output cylindrical gear are parallel, so that the rotation directions of the input cylindrical gear and the output cylindrical gear are consistent;

the input flange plate is used for being connected with external power;

and one end of the cylindrical gear shaft is fixed on the input flange plate, and the other end of the cylindrical gear shaft is fixed at the inner hole of the input cylindrical gear.

6. A gearbox drive system as defined in claim 5, wherein the life of the large bevel gear > the life of the small bevel gear shaft > the life of the output cylindrical gear > the life of the input cylindrical gear, and wherein the life of the input cylindrical gear is the predetermined life of the gearbox drive system.

7. A gearbox drive system as defined in claim 6, wherein the spur gear shaft is located above the first bevel pinion shaft, the spur gear shaft and the first bevel pinion shaft being parallel to one another with a space between the spur gear shaft and the first bevel pinion shaft.

8. A gearbox drive system as defined in claim 7, wherein the large bevel gear and the small bevel gear shaft each have helical teeth to effect bevel gear drive of the large bevel gear and the small bevel gear shaft.

9. A gearbox drive system as defined in claim 8, wherein the output cylindrical gear and the input cylindrical gear each have helical teeth to effect parallel drive of the cylindrical gears of the output cylindrical gear and the input cylindrical gear.

10. A gearbox drive system as defined in claim 9, wherein the angle of intersection between the two axes of the large bevel gear and the small bevel gear shaft is equal to 90 degrees.

11. A gearbox drive system as defined in claim 10, wherein the first large bevel gear and the second large bevel gear are located on either side of the universal drive shaft.

12. A bogie characterised by comprising a gearbox drive train as claimed in any one of claims 1 to 11.

13. The bogie of claim 12, further comprising:

the first gearbox box body is connected with a framework of the bogie; the first direction-changing transmission device and the single-shaft input transmission device are arranged in the first gearbox body;

the input end first rolling bearing is fixed at the position, between the input flange plate and the input cylindrical gear, of the cylindrical gear shaft, and the outer ring of the input end first rolling bearing is fixed with the first gear box body;

and the inner ring of the input end second rolling bearing is fixed at the position of the cylindrical gear shaft protruding from one side of the input cylindrical gear, and the outer ring of the input end second rolling bearing is fixed with the first gearbox box body.

14. The bogie of claim 13, further comprising:

the inner rings of the two first transmission end rolling bearings are fixed at two ends of the first small bevel gear shaft respectively, and the outer rings of the two first transmission end rolling bearings are fixed with the first gear box body respectively.

15. The bogie of claim 14, further comprising:

a second gearbox housing connected to the frame of the bogie; the second direction-changing transmission device is arranged in the second gear box body;

and the inner rings of the two transmission end second rolling bearings are respectively fixed at two ends of the second bevel pinion shaft, and the outer rings of the two transmission end second rolling bearings are respectively fixed with the second gearbox body.

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