Locomotive axle driving device, bogie and locomotive

Abstract

The invention provides a locomotive axle driving device, a locomotive bogie and a locomotive. The locomotive axle driving device comprises a traction motor, wheels, a suspender and a suspension arm. The wheels are arranged at the two ends of a motor shaft of the traction motor respectively and connected with the traction motor through the axle, and the axle and the motor shaft of the traction motor are coaxial. One end of the suspender is connected with the traction motor, and the other end of the suspender is used for being connected with a framework of the bogie. The suspension arm is arranged on the other side of the traction motor, one end of the suspension arm is connected with the traction motor, and the other end is used for connecting a framework. The locomotive axle driving device can be suitable for bogies with different single-axle powers.

Description

Technical Field

[0001] The present application relates to the field of locomotives, and particularly to a locomotive axle drive device and a bogie. Background Art

[0002] Rail locomotives are the main equipment in the field of rail transit. A locomotive includes a car body and a bogie. The bogie includes an axle drive device and a frame. The axle drive device of the locomotive is installed on the locomotive through the frame. The axle drive device includes wheels and traction motors. The locomotive wheels are connected with traction motors to provide power for the wheels to drive the locomotive forward and backward.

[0003] Different types of locomotives use different bogies. Due to different single-axle powers, the traction motors matched by different bogies are different, and the connection structures between the axle drive device and the frame of the bogie are also different. Thus, for different bogies, different locomotive axle drive devices need to be designed, with a long design cycle and high costs. Summary of the Invention

[0004] The main purpose of the present application is to provide a locomotive axle drive device that can adapt to bogies with different single-axle powers.

[0005] To achieve the above object, the present application adopts the following technical solutions:

[0006] According to one aspect of the present application, there is provided a locomotive axle drive device, including a traction motor, wheels, a suspension rod, and a suspension arm. The wheels are respectively arranged at both ends of the motor shaft of the traction motor. The wheels are connected to the traction motor through an axle, and the axle is coaxial with the motor shaft of the traction motor. The suspension rod is arranged on one side of the traction motor. One end of the suspension rod is connected to the traction motor, and the other end is used for connecting the frame of the bogie. The suspension arm is arranged on the other side of the traction motor. One end of the suspension arm is connected to the traction motor, and the other end is used for connecting the frame. Among them, the locomotive axle drive device can be applicable to bogies with different single-axle powers.

[0007] According to one embodiment of the present application, the suspension rod includes a first hole connecting the traction motor and a second hole connecting the frame. When the locomotive axle drive device is installed on bogies with different single-axle powers, the distance between the center of the first hole and the center of the second hole is different.

[0008] According to one embodiment of the present application, the suspension arm includes a side surface connecting the traction motor and a suspension hole connecting the frame. When the locomotive axle drive device is installed on bogies with different single-axle powers, the distance between the center of the suspension hole and the side surface is different.

[0009] According to one embodiment of the present application, the locomotive axle drive device further includes a shock absorber, one end of the shock absorber is connected to the traction motor, and the other end is connected to the frame; when the locomotive axle drive device is installed on bogies with different single-axle powers, the lengths of the shock absorbers are different.

[0010] According to one embodiment of the present application, the locomotive axle drive device further includes: a coupling and a protective cover, wherein the coupling connects the motor shaft of the traction motor and the axle. The protective cover is arranged between at least one wheel and the traction motor for protecting the coupling.

[0011] According to one embodiment of the present application, the material of the protective cover is aluminum-lithium alloy, titanium-aluminum alloy, magnesium alloy, beryllium alloy, titanium alloy or carbon fiber material.

[0012] According to another aspect of the present application, the present application further provides a locomotive bogie, including a frame and the above-mentioned locomotive axle drive device. The frame has an opening. The locomotive axle drive device is arranged in the opening, and the suspension rod and the suspension arm of the locomotive axle drive device are connected to the frame; wherein the locomotive bogie can be applicable to different types of locomotives.

[0013] According to one embodiment of the present application, the locomotive bogie further includes primary suspension and secondary suspension. The primary suspension is arranged between the frame and the locomotive axle drive device; the secondary suspension is arranged on the surface of the frame facing away from the primary suspension. Wherein the vertical stiffness of the secondary suspension is 10-20 times that of the primary suspension, and the lateral stiffness of the secondary suspension is 1-2 times that of the primary suspension.

[0014] According to one embodiment of the present application, the primary suspension includes an inner primary suspension and an outer primary suspension, and the outer primary suspension is arranged on the outer periphery of the inner primary suspension; the vertical stiffness of the outer primary suspension is greater than that of the inner primary suspension.

[0015] According to another aspect of the present application, the present application further provides a locomotive, including the above-mentioned bogie.

[0016] As can be seen from the above technical solutions, the advantages and positive effects of the locomotive axle drive device proposed in the present application are as follows:

[0017] The axle drive device proposed in this application includes a traction motor, a wheel, a hanging rod, and a suspension arm. The wheel is connected to the traction motor through an axle, and the axle and the motor shaft of the traction motor are coaxial. The hanging rod is arranged on one side of the traction motor, with one end connected to the traction motor and the other end for connecting to the frame of the bogie. The suspension arm is arranged on the other side of the traction motor, with one end connected to the traction motor and the other end for connecting to the frame. Among them, the axle drive device of the locomotive can be applied to bogies with different single-axis powers.

[0018] For the axle drive device of this application, for different bogies, there is no need to match different traction motors. The motor shaft of the traction motor and the axle of the wheel are coaxial, which can reduce the overall size of the axle drive device and improve the motor usage power.

[0019] For the axle drive device of this application, for different bogies, there is no need to specifically design the connection structure between the axle drive device and the frame of the bogie. The axle drive device of the locomotive in this application can be applied to bogies with different single-axis powers, enabling modular design, shortening the design cycle, and reducing costs. Brief Description of the Drawings

[0020] By considering the following detailed description of the preferred embodiments of this application in conjunction with the drawings, various objectives, features, and advantages of this application will become more obvious. The drawings are only exemplary illustrations of this application and are not necessarily drawn to scale. In the drawings, the same reference numerals always represent the same or similar components. Among them:

[0021] Figure 1 is a schematic diagram of the axle drive device (with primary suspension) of this application.

[0022] Figure 2 is Figure 1 a schematic diagram from another angle of

[0023] Figure 3 is Figure 1 a schematic diagram of the axle drive device of this application (the hanging rod and the suspension arm are not shown).

[0024] Figure 4 is a schematic diagram of the hanging rod of the axle drive device of this application.

[0025] Figure 5 is a schematic diagram of the suspension arm of the axle drive device of this application.

[0026] Figure 6 is a schematic diagram of the shock absorber of the axle drive device of this application.

[0027] Figure 7 is a schematic diagram of the coupling of the axle drive device of this application.

[0028] Figure 8 It is a schematic diagram of a bogie applicable to the locomotive axle drive device of the present application.

[0029] Figure 9 It is a schematic diagram of another bogie applicable to the locomotive axle drive device of the present application.

[0030] Figure 10 It is a schematic diagram of the primary suspension of the bogie.

[0031] Figure 11 It is a schematic diagram of the secondary suspension of the bogie.

[0032] The description of the reference numerals is as follows:

[0033] 1 - Locomotive axle drive device;

[0034] 2 - Bogie;

[0035] 10 - Traction motor;

[0036] 20 - Wheel;

[0037] 21 - Frame;

[0038] 22 - Primary suspension;

[0039] 23 - Secondary suspension;

[0040] 24 - Traction device;

[0041] 30 - Suspension rod;

[0042] 40 - Suspension arm;

[0043] 50 - Protective cover;

[0044] 60 - Shock absorber;

[0045] 201 - Left wheel;

[0046] 202 - Right wheel;

[0047] 210 - Opening;

[0048] 221 - Upper seat;

[0049] 222 - Outer primary suspension;

[0050] 223 - Inner primary suspension;

[0051] 224 - Lower seat;

[0052] 231 - Rubber block;

[0053] 232 - Mounting plate;

[0054] 301 - Left rod;

[0055] 302 - Right rod;

[0056] 303 - First hole;

[0057] 304 - Second hole;

[0058] 401 - Side;

[0059] 402 - Hanging hole;

[0060] 403 - Fixing hole;

[0061] 501 - Left cover;

[0062] 502 - Right cover;

[0063] 503 - Notch;

[0064] 504 - Wire - passing hole;

[0065] 601 - First end;

[0066] 602 - Second end;

[0067] 603 - Vibration - damping main body;

[0068] D - Distance between the center of the first hole and the center of the second hole. Detailed implementation manners

[0069] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures and thus their detailed description will be omitted.

[0070] In the following description of different exemplary embodiments of the present application, reference is made to the accompanying drawings which form a part of the present application and in which are shown, by way of example, different exemplary structures, systems, and steps by which various aspects of the present application can be implemented. It should be understood that other specific solutions of components, structures, exemplary devices, systems, and steps can be used and structural and functional modifications can be made without departing from the scope of the present application. Also, although terms such as "above", "between", "inside", etc. may be used in this specification to describe different exemplary features and elements of the present application, these terms are used herein for convenience only, for example, according to the directions of the examples described in the drawings. Nothing in this specification should be construed as requiring a specific three - dimensional orientation of the structure to fall within the scope of the present application.

[0071] It will be understood that the terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or components inherent to these processes, methods, products or devices.

[0072] Relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element, as shown in the figures. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientations shown in the figures. For example, if the device in one figure is flipped, the element described as "lower" or "bottom" of other elements will be oriented "upper" or "top" of other elements. Thus, the exemplary term "lower" may include the orientations of "lower" and "upper", and the term "bottom" may include the orientations of "bottom" and "top", depending on the specific orientation of the figure. Similarly, if the device in one figure is flipped, the element described as "lower" or "bottom" of other elements will be oriented "upper" or "top" of other elements. Thus, the exemplary terms "bottom" or "beneath" may include the orientations of upper and lower.

[0073] Refer to Figures 1 to 3 , which representatively shows the locomotive axle drive device 1 of the present application, including a traction motor 10, a wheel 20, a suspension rod 30 and a suspension arm 40. The wheels 20 are respectively arranged at both ends of the motor shaft of the traction motor 10. The wheels 20 are connected to the traction motor 10 through an axle, and the axle and the motor shaft of the traction motor 10 are coaxial. The suspension rod 30 is arranged on one side of the traction motor 10. One end of the suspension rod 30 is connected to the traction motor 10, and the other end is used to connect to the frame 21 of the bogie 2 (see Figure 8 and Figure 9 ). The suspension arm 40 is arranged on the other side of the traction motor 10. One end of the suspension arm 40 is connected to the traction motor 10, and the other end is used to connect to the frame 21. Among them, the locomotive axle drive device 1 can be applied to bogies 2 with different single-axle powers.

[0074] When the locomotive axle drive device 1 of the present application is applied to bogies 2 with different single-axle powers, it is not necessary to redesign the locomotive axle drive device 1, it is not necessary to use different traction motors 10, and it is not necessary to design the connection structure between different axle drive devices and the frame 21 of the bogie 2. It can be applied to bogies 2 with different single-axle powers, and modular design of the bogie 2 can be realized, which is beneficial to shortening the design cycle and improving the design efficiency and production efficiency.

[0075] Among them, the locomotive axle drive device 1 of the present application can be compatible with bogies 2 with a single-axle power of 800 kW to 1300 kW. SeeFigures 1 to 3 , the wheel 20 of the present application includes a left wheel 201 and a right wheel 202, and the suspension rod 30 includes a left rod 301 and a right rod 302, wherein the left rod 301 is arranged close to the left wheel 201, and the right rod 302 is arranged close to the right wheel 202.

[0076] See Figure 4 , in this embodiment, the suspension rod 30 includes a first hole 303 connecting the traction motor 10 and a second hole 304 connecting the frame 21. When the locomotive axle drive device 1 is installed on bogies 2 with different single-axle powers, the distance D between the center of the first hole 303 and the center of the second hole 304 is different.

[0077] When the locomotive axle drive device 1 of the present application is installed on bogies 2 with different single-axle powers, it is not necessary to use different traction motors 10, and it is not necessary to design a connection structure between different axle drive devices and the frame 21 of the bogie 2. Only the distance between the center of the first hole 303 and the center of the second hole 304 of the suspension rod 30 needs to be adjusted, and the operation is simple, which can make the locomotive axle drive device 1 adapt to bogies 2 with different single-axle powers.

[0078] See Figure 5 , in this embodiment, the suspension arm 40 includes a side surface 401 connecting the traction motor 10 and a suspension hole 402 connecting the frame 21. When the locomotive axle drive device 1 is installed on bogies 2 with different single-axle powers, the distance between the center of the suspension hole 402 and the side surface 401 is different.

[0079] When the locomotive axle drive device 1 of the present application is installed on bogies 2 with different single-axle powers, it is not necessary to use different traction motors 10, and it is not necessary to design a connection structure between different axle drive devices and the frame 21 of the bogie 2. Only the distance between the center of the suspension hole 402 and the side surface 401 needs to be adjusted, and the operation is simple, which can make the locomotive axle drive device 1 adapt to bogies 2 with different single-axle powers.

[0080] Wherein, a fixing hole 403 is provided on the side surface 401 of the suspension arm 40 connecting the traction motor 10. In actual use, since the distance between the center of the suspension hole 402 and the side surface 401 is not easy to measure, the distance between the center of the suspension hole 402 and the fixing hole 403 is used for substitution. There can be multiple fixing holes 403, and the fixing holes 403 for measurement corresponding to different bogies 2 are corresponding. That is to say, see Figure 5 , when adjusting the dimensions of the suspension arms 40 applicable to different bogies 2, the distance between the center of the suspension hole 402 and the fixing hole 403 all adopts Figure 5 the fixing hole 403 shown.

[0081] In this embodiment, see Figures 1 to 3 andFigure 6 The locomotive axle drive device 1 further includes a shock absorber 60. One end of the shock absorber 60 is connected to the traction motor 10, and the other end is connected to the frame 21. When the locomotive axle drive device 1 is installed on bogies 2 with different single-axle powers, the length of the shock absorber 60 is different. By arranging the shock absorber 60 between the traction motor 10 and the frame 21, the collision impact during the operation of the locomotive can be further alleviated. For the locomotive axle drive device 1 of the present application, when it is installed on bogies 2 with different single-axle powers, there is no need to use different traction motors 10, and there is no need to design different connection structures between the axle drive device and the frame 21 of the bogie 2. Only shock absorbers 60 with different lengths need to be selected, and the structure is simple, enabling the locomotive axle drive device 1 to adapt to bogies 2 with different single-axle powers.

[0082] Among them, the shock absorber 60 includes a shock-absorbing main body 603 and a first end 601 and a second end 602 arranged at both ends of the shock-absorbing main body 603. When the first end 601 is connected to the traction motor 10, the second end 602 is connected to the frame 21; vice versa. The shock-absorbing main body 603 adopts a telescopic structure, so that the length of the shock absorber 60 can be adjusted. Figure 6 Joints are respectively arranged at the first end 601 and the second end 602 of the shock absorber 60.

[0083] In this embodiment, referring to Figures 1 to 3 The locomotive axle drive device 1 further includes: a coupling and a protective cover 50. The coupling connects the motor shaft of the traction motor 10 and the axle. The protective cover 50 is arranged between at least one wheel 20 and the traction motor 10 for protecting the coupling. During the operation of the locomotive, the sand and gravel on the track will cause collision impact on the coupling of the axle drive device. As a key component connecting the traction motor 10 and the wheel 20, the coupling plays a role in transmitting the output torque of the motor. The protective cover 50 mainly functions to protect the coupling and prevent the sand and gravel on the track from damaging the coupling. The protective cover 50 includes a left cover 501 and a right cover 502. The left cover 501 is arranged between the traction motor 10 and the left wheel 201, and the right cover 502 is arranged between the traction motor 10 and the right wheel 202.

[0084] Figure 7 The shape of the protective cover 50 is shown. The protective cover 50 is in a "C" shape and has a notch 503. The cross-section of the protective cover 50 perpendicular to the length direction of the protective cover 50 is in an "L" shape. At the corner of the "L" - shaped cross-section of the protective cover 50, a plurality of wire passing holes 504 are arranged along the length direction of the protective cover 50, and there are intervals between the wire passing holes 504.

[0085] In this embodiment, the material of the protective cover 50 is aluminum-lithium alloy, titanium-aluminum alloy, magnesium alloy, beryllium alloy, titanium alloy or carbon fiber material. These materials are all light high-strength materials, which include two categories: light high-strength metal materials and light high-strength non-metal materials. The former includes aluminum-lithium alloy, titanium-aluminum alloy, magnesium alloy, beryllium alloy and titanium alloy, etc. The most typical one is aluminum-lithium alloy, which has higher strength, lighter weight, and also has anti-fatigue and corrosion resistance properties. The latter is mainly carbon fiber-reinforced carbon matrix composite material, which also has high strength, light weight and corrosion resistance characteristics.

[0086] Among them, the protective cover 50 of the present application is made of carbon fiber material. The protective cover 50 made of carbon fiber is light in weight, has strong impact resistance, and also has prominent heat dissipation and moisture-proof performance. The following Table 1 is the main performance parameters of the carbon fiber protective cover 50 of the present application:

[0087] Table 1: Main performance parameters of the protective cover 50 of the present application

[0088] Parameter Value Parameter Value Elastic modulus E11 / GPa 147 Tensile strength Xt / MPa 1736 Elastic modulus E22 / GPa 8.47 Compressive strength Xc / MPa 1058 Elastic modulus E32 / GPa 8.47 Tensile strength Yt / MPa 51.4 Poisson's ratio v12 0.35 Compressive strength Yc / MPa 192.4 Poisson's ratio v13 0.35 Tensile strength Zt / MPa 51.4 Poisson's ratio v23 0.45 Compressive strength Zc / MPa 192.4 Shear modulus G12 / GPa 4.95 Shear strength Sxy / MPa 91.4 Shear modulus G13 / GPa 4.95 Shear strength Sxz / MPa 91.4 Shear modulus G23 / GPa 3 Shear strength Syz / MPa 67.8 Density kg / m3 1700

[0089] As can be seen from the above Table 1, the protective cover 50 of the present application is made of carbon fiber material, is light in weight, has high strength, has good impact resistance, and also has good heat dissipation and moisture-proof performance.

[0090] Figure 8 This is a bogie 2 applicable to the locomotive wheel axle drive device 1 of the present application, a "Bo-Bo" bogie. Figure 9 This is another bogie 2 applicable to the locomotive wheel axle drive device 1 of the present application, a "Co-Co" bogie. Figure 8 and Figure 9 , the bogie 2 provided by the present application includes a frame 21 and the above-mentioned locomotive wheel axle drive device 1. Among them, the frame 21 has an opening 210. The locomotive wheel axle drive device 1 is arranged in the opening 210, and the suspension rod 30 and the suspension arm 40 of the locomotive wheel axle drive device 1 are connected to the frame 21; among them, the locomotive bogie 2 can be applicable to different types of locomotives.

[0091] Among them, the bogie 2 of the present application further includes a traction device 24, which is arranged at one end of the frame 21 and is used for traction connection with other structures of the locomotive to drive the locomotive to run.

[0092] In this embodiment, the locomotive bogie 2 further includes a primary suspension 22 and a secondary suspension 23. The primary suspension 22 is arranged between the frame 21 and the locomotive wheel axle drive device 1; the secondary suspension 23 is arranged on the surface of the frame 21 facing away from the primary suspension 22. Among them, the vertical stiffness of the secondary suspension 23 is 10-20 times that of the primary suspension 22, and the lateral stiffness of the secondary suspension 23 is 1-2 times that of the primary suspension 22.

[0093] See Figure 10 , the primary suspension 22 includes an inner primary suspension 223 and an outer primary suspension 222. The outer primary suspension 222 is disposed on the outer periphery of the inner primary suspension 223; the vertical stiffness of the outer primary suspension 222 is greater than that of the inner primary suspension 223. The lateral stiffness of the outer primary suspension 222 is much greater than that of the inner primary suspension 223. Both the inner primary suspension 223 and the outer primary suspension 222 can be springs. The primary suspension also includes an upper seat 221 and a lower seat 224, and both the inner primary suspension 223 and the outer primary suspension 222 are disposed between the upper seat 221 and the lower seat 224. The upper seat 221 is also connected to a structure extending into the inner primary suspension 223, which provides a certain support and guiding effect on the deformation of the spring.

[0094] For the bogie 2 of the present application, the stiffness of the primary suspension 22 and the secondary suspension 23 are mutually matched, and the bogie 2 can be used for various types of locomotives. The stiffness parameters of the primary suspension 22 are shown in Table 2 below, and the stiffness parameters of the secondary suspension 23 are shown in Table 3 below:

[0095] Table 2: Stiffness parameters of the primary suspension 22 of the present application

[0096] Primary suspension within the bogie 223 Primary suspension outside the bogie 222 Unit Vertical stiffness 178±5％ 467.1±5％ N / mm Lateral stiffness 44 386.5 N / mm

[0097] The vertical stiffness of the primary suspension 22 is the sum of the vertical stiffness of the inner primary suspension 223 and the vertical stiffness of the outer primary suspension 222; similarly, the lateral stiffness of the primary suspension 22 is the sum of the lateral stiffness of the inner primary suspension 223 and the lateral stiffness of the outer primary suspension 222.

[0098] Table 3: Stiffness parameters of the secondary suspension 23 of the present application

[0099] Primary spring (inner) Unit Vertical stiffness 8000±20％ N / mm Lateral stiffness 500±20％ N / mm Longitudinal stiffness 290±15％ N / mm

[0100] Wherein, the longitudinal direction refers to the direction of the locomotive's forward movement, the vertical direction refers to the vertical direction, and the lateral direction refers to the direction perpendicular to the locomotive's forward movement in the horizontal plane.

[0101] See Figure 11 , the secondary suspension 23 includes a rubber stack, and the rubber stack is composed of a plurality of mutually stacked rubber blocks 231. The bottom of the rubber stack is connected with a mounting plate 233 for mounting the rubber stack. Using rubber blocks 231 stacked into a rubber stack has large stiffness, simple structure, and low cost.

[0102] The bogie 2 of the present application can be used for various types of locomotives such as permanent magnet locomotives, AC drive locomotives, or DC drive locomotives.

[0103] The above is a detailed description of several exemplary embodiments of the locomotive axle drive device 1 proposed in this application. The following will describe the usage process of the locomotive axle drive device 1 proposed in this application in detail.

[0104] Combined with the attached Figures 1 to 11 , the usage process of the locomotive axle drive device 1 proposed in this application is as follows:

[0105] When applicable to the "Bo-Bo" bogie 2, for the axle drive device 1 of this application, the distance between the first hole 303 and the second hole 304 of the suspension rod 30 is 745 mm. At the same time, the distance between the suspension hole 402 of the suspension arm 40 and Figure 7 the fixed hole 403 shown is 500 mm.

[0106] When applicable to the "Co-Co" bogie 2, for the axle drive device 1 of this application, the distance between the first hole 303 and the second hole 304 of the suspension rod 30 is 830 mm. At the same time, the distance between the suspension hole 402 of the suspension arm 40 and Figure 7 the fixed hole 403 shown is 530 mm.

[0107] At the same time, the parameters of the shock absorber 60 when applicable to different bogies 2 are shown in Table 4 below:

[0108] Table 4: Parameters of the shock absorber 60 of this application when applicable to different bogies 2

[0109] "Bo - Bo" bogie "Co - Co" bogie Length of the vibration damping main body 603 450mm ± 60mm 550mm ± 70mm Maximum torsional angle of both ends joints ±18° ±18° Maximum deflection angle of both ends joints ±18° ±18° Stiffness of both ends joints (kN / mm) 20 (radial) 30 (radial) Unloading speed (m / s) 0.1 / 0.3 0.2 / 0.3 Damping force (N) (tolerance ±15%) 4000 / 6000 5000 / 6000

[0110] From the above usage process of the locomotive axle drive device 1, it can be seen that for the axle drive device 1 of this application, for different bogies 2, there is no need to match different traction motors 10. The motor shaft of the traction motor 10 and the axle of the wheel 20 are coaxial, which can reduce the overall size of the axle drive device and improve the motor usage power. For different bogies 2, there is no need to specifically design the connection structure between the axle drive device and the frame 21 of the bogie 2. The locomotive axle drive device 1 of this application can be applicable to bogies 2 with different single-axis powers and can achieve modular design.

[0111] In summary, the locomotive axle drive device proposed in this application includes a traction motor, wheels, a suspension rod, and a suspension arm. The wheels are respectively arranged at both ends of the motor shaft of the traction motor. The wheels are connected to the traction motor through an axle, and the axle and the motor shaft of the traction motor are coaxial. The suspension rod is arranged on one side of the traction motor. One end of the suspension rod is connected to the traction motor, and the other end is used to connect to the frame of the bogie. The suspension arm is arranged on the other side of the traction motor. One end of the suspension arm is connected to the traction motor, and the other end is used to connect to the frame. For different bogies, there is no need to match different traction motors. The motor shaft of the traction motor and the axle of the wheel are coaxial, which can reduce the overall size of the axle drive device and improve the power utilization of the motor. For different bogies, there is no need to specifically design the connection structure between the axle drive device and the frame of the bogie. The locomotive axle drive device can be applied to bogies with different single-axis powers.

[0112] The bogie provided in this application includes a frame and the above-mentioned locomotive axle drive device. The frame has an opening. The locomotive axle drive device is arranged in the opening, and the suspension rod and the suspension arm of the locomotive axle drive device are connected to the frame. The locomotive bogie can be applied to different types of locomotives.

[0113] It can be understood that the various embodiments / implementations provided in this application can be combined with each other without conflict, and no further examples will be given here.

[0114] In the above exemplary embodiment, the locomotive axle drive device proposed in this application is described by taking its application to a rail locomotive as an example. It is easy for those skilled in the art to understand that in order to apply the relevant designs of this application to other types of locomotives, various modifications, additions, substitutions, deletions, or other changes are made to the specific embodiments, and these changes are still within the scope of the principle of the locomotive axle drive device proposed in this application.

[0115] It should be noted here that the locomotive axle drive devices shown in the drawings and described in this specification are only several examples of the many locomotive axle drive devices that can adopt the principle of this application. It should be clearly understood that the principle of this application is by no means limited to any details or any components of the locomotive axle drive devices shown in the drawings or described in this specification.

[0116] In an embodiment, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "plural" means two or more, unless otherwise clearly defined. Terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "coupled" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiment can be understood according to specific circumstances.

[0117] The exemplary embodiments of the locomotive axle drive device proposed in the present application have been described and / or illustrated in detail above. However, the embodiments of the present application are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of one embodiment can also be used in combination with the other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "one", "a", and "the above" are used to indicate the existence of one or more elements / components / etc.

[0118] The embodiments of the present application are not limited to the specific embodiments described herein. On the contrary, the components of each embodiment can be used independently and separately from the other components described herein. Each component of one embodiment can also be used in combination with the other components of other embodiments. In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "other embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0119] The above are only the preferred embodiments of the embodiments of the present application and are not used to limit the embodiments of the present application. For those skilled in the art, various changes and modifications can be made to the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A locomotive wheel axle drive device, characterized in that: include: Traction motor; Wheels are respectively arranged at both ends of the motor shaft of the traction motor, the wheels are connected to the traction motor via an axle, and the axle and the motor shaft of the traction motor are coaxial; A suspension rod is arranged on one side of the traction motor, one end of the suspension rod is connected to the traction motor, and the other end of the suspension rod is used to connect to the frame of the bogie; A suspension arm is arranged on the other side of the traction motor, one end of the suspension arm is connected to the traction motor, and the other end is used to connect to the frame; The locomotive wheel axle drive device can be applicable to bogies with different single-axle powers.

2. The locomotive wheel axle drive device according to claim 1, characterized in that: The suspension rod includes a first hole connected to the traction motor and a second hole connected to the frame. When the locomotive wheel axle drive device is installed on bogies with different single-axle powers, the distance between the center of the first hole and the center of the second hole is different.

3. The locomotive wheel axle drive device according to claim 1, characterized in that: The suspension arm includes a side surface connected to the traction motor and a suspension hole connected to the frame. When the locomotive wheel axle drive device is installed on a bogie with different single-axle power, the distance between the center of the suspension hole and the side surface is different.

4. The locomotive wheel axle drive device according to claim 1, characterized in that: It also includes a shock absorber, one end of which is connected to the traction motor and the other end of which is connected to the frame; When the locomotive wheel axle drive device is installed on bogies with different single-axle powers, the lengths of the shock absorbers are different.

5. The locomotive wheel axle drive device according to claim 1, characterized in that: Also includes: A coupling connecting the motor shaft of the traction motor and the axle; A protective cover is arranged between at least one wheel and the traction motor and is used to protect the coupling.

6. The locomotive wheel axle drive device according to claim 5, characterized in that: The material of the protective cover is aluminum-lithium alloy, titanium-aluminum alloy, magnesium alloy, beryllium alloy, titanium alloy or carbon fiber material.

7. A locomotive bogie, characterized in that: include: A frame, having an opening; The locomotive wheel axle drive device according to any one of claims 1 to 6, arranged in the opening, the suspension rod and the suspension arm of the locomotive wheel axle drive device being connected to the frame; The locomotive bogie described herein can be suitable for different types of locomotives.

8. The locomotive bogie according to claim 7, characterized in that: Also includes: a primary suspension, disposed between the frame and the locomotive wheel axle drive device; A secondary suspension is arranged on a surface of the frame facing away from the primary suspension; The vertical stiffness of the secondary suspension is 10-20 times that of the primary suspension, and the lateral stiffness of the secondary suspension is 1-2 times that of the primary suspension.

9. The locomotive bogie according to claim 8, characterized in that: The first-system suspension includes an inner suspension and an outer suspension, wherein the outer suspension is arranged on the outer periphery of the inner suspension; the vertical stiffness of the outer suspension is greater than the vertical stiffness of the inner suspension.

10. A locomotive, characterized in that: A locomotive bogie comprising the locomotive bogie described in any one of claims 7 to 9.

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