Heavy-load biaxial electric drive axle, wheel set and vehicle

Abstract

The utility model discloses a heavy-load biaxial electric drive axle, a wheel set and a vehicle, and relates to the technical field of electric vehicle drive.On one hand, the axle comprises an axle shell, a motor stator, a drive shaft and a motor rotor, the axle shell is used for being connected with an upper structure, and the axle shell is provided with a containing space; the motor stator is arranged in the containing space and connected with the inner wall of the axle shell. The driving shaft penetrates through the containing space and is rotationally connected with the axle shell, and the two ends, extending out of the axle shell, of the driving shaft are used for being connected with driving tires. The motor rotor is arranged outside the driving shaft in a sleeving mode and fixedly connected with the driving shaft, and the motor rotor is arranged outside the electronic stator in an embracing mode. The two ends of the driving shaft extend out of the axle shell to be connected with the driving tires, the motor rotor and the driving shaft are assembled and formed, and the motor stator and the axle shell are assembled and formed, so that it is ensured that the axle shell with the limited containing space can provide support for an upper vehicle body structure, the heavy bearing capacity is met, and meanwhile axle eccentric driving is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle driving, in particular to a heavy-loaded double-axial electric drive axle, a wheel set and a vehicle. Background Art

[0002] In recent years, with the rapid development of my country's automobile industry, the axle system as one of the main components of automobiles has also received corresponding attention and development. The axle is at the end of the transmission system, used to transmit various forces and moments between the frame and the wheels, bear the load of the car, and maintain the normal driving of the car on the road. Its quality and performance directly affect the load-bearing capacity and service life of the car.

[0003] The prefabricated box girder handling equipment (beam movers and beam transporters) for high-speed railways and highways requires heavy-duty transport equipment. However, due to the limited wheelbase of the axle, the low power density and large size of the motor, after configuring the standard model motor, the internal structure of the entire axle can only accommodate one set of drive motors, resulting in a single-sided eccentric force structure for the heavy-loaded drive axle. The existing axle is no longer suitable for large-tonnage vehicles. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of the utility model is to provide a heavy-loaded biaxial electric drive axle, wheel set and vehicle, so as to solve the problems that the electric drive axle in the prior art cannot adapt to the load-bearing capacity and layout space of heavy-loaded vehicles, and the axle is eccentrically driven.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] In one aspect, the present application provides a heavy-duty dual-axial electric drive axle, comprising:

[0007] An axle housing, which is used to be connected to the upper structure, and the axle housing has a receiving space;

[0008] A motor stator, which is disposed in the accommodation space and connected to the inner wall of the axle housing;

[0009] A drive shaft is inserted into the accommodation space and is rotatably connected to the axle housing. The drive shaft extends out of both ends of the axle housing to be connected to the drive tires.

[0010] The motor rotor is sleeved outside the driving shaft and fixedly connected to the driving shaft, and the motor rotor is embraced outside the motor stator.

[0011] In some optional embodiments, the two ends of the drive shaft extending out of the axle housing are drivingly connected to the wheel-side reducer through a spline shaft or a flat key shaft, and the wheel-side reducer is used to be connected to the driving tire.

[0012] In some optional embodiments, the wheel-side reducer is connected to the axle housing via an end flange.

[0013] In some optional embodiments, a DC brake is further included, which is located in the above-mentioned accommodation space and connected to the above-mentioned driving shaft.

[0014] In some optional embodiments, both ends of the drive shaft are fixedly connected to the axle housing via bearings.

[0015] In some optional embodiments, the inner wall of the axle housing is provided with iron core support ribs, and the motor stator is mounted on the iron core support ribs.

[0016] In some optional embodiments, the axle housing is a cylinder made of seamless steel pipe parts.

[0017] In some optional embodiments, ventilation holes are provided on the axle housing.

[0018] In a second aspect, the present application also provides a heavy-loaded electric drive wheel set, including a drive tire and any of the above-mentioned heavy-loaded dual-axial electric drive axles.

[0019] In a third aspect, the present application also provides a vehicle comprising the above-mentioned heavy-load electric drive wheel set.

[0020] Compared with the prior art, the advantages of the utility model are:

[0021] By extending both ends of the drive shaft out of the axle housing and connecting them to the drive tires, after the motor stator is energized, the drive motor rotor drives the drive shaft to rotate relative to the axle housing, thereby realizing biaxial drive travel; the motor rotor and the drive shaft are assembled, and the motor stator and the axle housing are assembled, thereby ensuring that the axle housing can not only provide support for the upper body structure to meet the heavy-duty load-bearing capacity, but also provide stable structural support for the rotating magnetic field generated by the motor stator, and avoid eccentric drive of the axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 The utility model is a cross-sectional schematic diagram of a heavy-duty dual-axial electric drive axle.

[0024] In the figure: 1. axle housing; 11. core support ribs; 12. ventilation holes; 13. end flanges; 2. motor stator; 3. drive shaft; 31. bearings; 4. motor rotor; 5. wheel-side reducer; 6. DC brake. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] The following is a further detailed description of an embodiment of a heavy-duty dual-axial electric drive axle, a wheel set and a vehicle of the utility model in conjunction with the accompanying drawings.

[0027] First, as Figure 1 As shown, the present application provides a heavy-loaded biaxial electric drive axle, including an axle housing 1, a motor stator 2, a drive shaft 3 and a motor rotor 4, the axle housing 1 is used to connect with the upper structure, and the axle housing 1 has a accommodating space; the motor stator 2 is arranged in the accommodating space and connected to the inner wall of the axle housing 1; the drive shaft 3 is passed through the accommodating space and is rotatably connected to the axle housing 1, and the drive shaft 3 extends out of both ends of the axle housing 1 for connection with the drive tires; the motor rotor 4 is sleeved outside the drive shaft 3 and fixedly connected to the drive shaft 3, and the motor rotor 4 is embraced outside the motor stator 2.

[0028] It can be understood that both ends of the drive shaft 3 extend out of the axle housing 1 and are connected to the drive tires, thereby providing uniform driving force for both sides of the heavy-loaded axle, avoiding eccentric force on the axle, and realizing two-way axle output in a limited axle space to drive both sides of the axle.

[0029] During the driving process, after the motor stator 2 is powered, the driving motor rotor 4 drives the driving shaft 3 to rotate relative to the axle housing 1, thereby realizing biaxial driving. The motor rotor 4 is assembled with the driving shaft 3, and the motor stator 2 is assembled with the axle housing 1, thereby ensuring that the axle housing 1 can not only provide support for the upper body structure to meet the heavy-duty load-bearing capacity, but also provide stable structural support for the rotating magnetic field generated by the motor stator.

[0030] In some optional embodiments, the drive shaft 3 extends out of both ends of the axle housing 1 and is drivingly connected to the wheel-side reducer 5 through a spline shaft or a flat key shaft, and the wheel-side reducer 5 is used to be connected to the driving tire.

[0031] That is to say, there are two wheel-side reducers 5, which are respectively installed at the two ends of the drive shaft 3 connected to the drive tire. The two ends of the drive shaft 3 are respectively processed with spline shafts or flat key shafts, and the wheel-side reducer 5 is provided with a spline hole that cooperates with the spline shaft or flat key shaft to achieve the transmission connection between the wheel-side reducer 5 and the drive shaft 3.

[0032] In this example, the wheel-side reducer 5 is a heavy-duty load-bearing reducer with a large radial load-bearing capacity, and different speed ratios can be selected according to the speed matching of the entire vehicle.

[0033] Preferably, the motor stator 2 is connected to the drive shaft 3 by interference fit.

[0034] Furthermore, the wheel-side reducer 5 is connected to the axle housing 1 via an end flange 13 .

[0035] The end flanges 13 are installed at both ends of the axle housing 1 and are fixedly connected to the axle housing 1 by bolts. The wheel-side reducer 5 is connected to the end flanges 13, which is convenient for installation and disassembly with the axle housing 1, and the connection has good sealing and high connection strength, so that the integrity of the electric drive axle is better and the structural operation integrity is high.

[0036] In some optional embodiments, a DC brake 6 is further included, which is located in the above-mentioned accommodation space and connected to the above-mentioned driving shaft 3.

[0037] The DC brake 6 controls the braking of the motor rotor 4, thereby achieving running braking of the entire axle.

[0038] In specific practical applications, the braking method may be electromagnetic braking or mechanical braking. For example, a brake disc may be fixedly connected to the axle housing 1 , and a brake caliper may be fixedly installed on the drive shaft 3 .

[0039] In some optional embodiments, both ends of the drive shaft 3 are fixedly connected to the axle housing 1 via bearings 31 .

[0040] In order to realize the rotatable connection between the axle housing 1 and the drive shaft 3, a bearing 31 is provided on the axle housing 1, and the bearing 31 is installed on the drive shaft 3. At the same time, the bearing 31 can also serve as a structural part of the axle housing 1, play a supporting role, and increase the overall structural strength of the axle.

[0041] Preferably, the DC brake 6 is fixedly connected to the bearing 31 via a flange.

[0042] The DC brake 6 is fixedly connected to the bearing 31 through a flange and is located in the accommodating cavity.

[0043] In some optional embodiments, the inner wall of the axle housing 1 is provided with an iron core support rib 11 , and the motor stator 2 is mounted on the iron core support rib 11 .

[0044] In order to make the connection between the motor stator 2 and the axle housing 1 more stable, an iron core support rib 11 is provided on the inner wall of the axle housing 1 , which can also increase the torsion and bending resistance of the entire axle housing 1 and improve the axle load-bearing capacity.

[0045] In some optional embodiments, the axle housing 1 is a cylinder made of seamless steel pipes.

[0046] It can be understood that the size of the cylindrical axle housing 1 is adapted to the size of the motor stator 2 and the motor rotor 4, and the housing material is high-quality structural steel, which ensures that the overall axle housing has greater strength and rigidity and meets the design requirements for the allowable bending stress of the axle housing. In addition, the cylindrical axle housing 1 is easy to cast, compact in structure, small in size, light in weight, and easy to install and operate.

[0047] In some optional embodiments, ventilation holes 12 are provided on the axle housing 1 .

[0048] It can be understood that the ventilation hole 12 is used to cooperate with the lateral fan to achieve heat dissipation inside the shell, and the ventilation hole 12 can be a rectangular hole.

[0049] In a second aspect, the present application also provides a heavy-loaded electric drive wheel set, including a drive tire and any of the above-mentioned heavy-loaded dual-axial electric drive axles.

[0050] Specifically, the heavy-load electric drive wheel set includes an axle housing 1, a motor stator 2, a drive shaft 3, a motor rotor 4 and a drive tire. The axle housing 1 is used to connect to the upper structure, and the axle housing 1 has an accommodating space; the motor stator 2 is arranged in the accommodating space and is connected to the inner wall of the axle housing 1; the drive shaft 3 is passed through the accommodating space and is rotatably connected to the axle housing 1, and the drive shaft 3 extends out of both ends of the axle housing 1 and is connected to the drive tire; the motor rotor 4 is sleeved outside the drive shaft 3 and is fixedly connected to the drive shaft 3, and the motor rotor 4 is embraced outside the motor stator 2.

[0051] Preferably, the two ends of the drive shaft 3 extending out of the axle housing 1 are drivingly connected to the wheel-side reducer 5 through a spline shaft or a flat key shaft, and the wheel-side reducer 5 is used to be connected to the driving tire.

[0052] That is to say, there are two wheel-side reducers 5, which are respectively installed at the two ends of the drive shaft 3 connected to the drive tire. The two ends of the drive shaft 3 are respectively processed with spline shafts or flat key shafts, and the wheel-side reducer 5 is provided with a spline hole that cooperates with the spline shaft or flat key shaft to achieve the transmission connection between the wheel-side reducer 5 and the drive shaft 3.

[0053] It can be understood that the driving tire is connected to the wheel-side reducer 5 via the driving rim flange, thereby realizing biaxial driving travel.

[0054] Through the double-exit shaft of the drive shaft 3, and in conjunction with the motor stator 2 and the motor rotor 4 to realize the drive shaft 3 to rotate relative to the axle housing 1 after power is turned on, not only the double-exit shaft drive is realized in a limited space, but also it has the advantages of low carbon, environmental protection and energy saving compared with hydraulic drive. The axle housing 1 and the motor stator 2 are installed and matched to form a whole, and the drive shaft 3 and the motor rotor 4 are installed and matched to form a whole, so the heavy-duty electric drive wheel set has higher integrity, is easy to purchase and assemble, has low cost, is easy to maintain, the overall space layout of the axle is more optimized, and has a stronger load-bearing capacity, which is suitable for running mechanisms that require higher load-bearing.

[0055] In a third aspect, the present application also provides a vehicle comprising the above-mentioned heavy-load electric drive wheel set.

[0056] Through the above-mentioned heavy-load electric drive wheel set, the vehicle's load capacity is higher, and it is suitable for prefabricated box girder handling equipment in railway and highway construction, such as beam movers, beam transporters, etc., and the power is stable and reliable.

[0057] The utility model discloses a heavy-duty biaxial electric drive axle, wheel set and vehicle. The two ends of the drive shaft 3 are extended out of the axle housing 1 and connected to the drive tire. After the motor stator 2 is energized, the drive motor rotor 4 drives the drive shaft 3 to rotate relative to the axle housing 1, thereby realizing biaxial driving travel; the motor rotor 4 is assembled with the drive shaft 3, and the motor stator 2 is assembled with the axle housing 1, thereby ensuring that the axle housing 1 can not only provide support for the upper body structure to meet the heavy-duty load-bearing capacity, but also provide stable structural support for the rotating magnetic field generated by the motor stator, and avoid eccentric driving of the axle; by arranging the iron core support ribs 11 on the inner wall of the axle housing 1, not only the connection between the motor stator 2 and the axle housing 1 is made more stable, but also the torsion and bending resistance of the entire axle housing 1 can be increased, and the load-bearing capacity of the axle is improved; the cylindrical axle housing 1 is adopted, and the housing material is high-quality structural steel, so as to ensure that the overall axle housing has greater strength and rigidity, meet the design requirements of the allowable bending stress of the axle housing, and is easy to cast, compact in structure, small in size, light in weight, and convenient to install and operate.

[0058] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0059] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0060] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A heavy-duty dual-axial electric drive axle, characterized in that: include: An axle housing (1) used for connecting to an upper structure, wherein the axle housing (1) has a receiving space; A motor stator (2), which is arranged in the accommodation space and connected to the inner wall of the axle housing (1); A drive shaft (3) is inserted into the accommodation space and is rotatably connected to the axle housing (1); the drive shaft (3) extends out of both ends of the axle housing (1) and is used to be connected to a drive tire; The motor rotor (4) is sleeved outside the drive shaft (3) and fixedly connected to the drive shaft (3); the motor rotor (4) is embraced outside the motor stator (2).

2. The heavy-duty dual-axial electric drive axle according to claim 1, characterized in that: The two ends of the drive shaft (3) extending out of the axle housing (1) are drivingly connected to a wheel-side reducer (5) via a spline shaft or a flat key shaft, and the wheel-side reducer (5) is used to be connected to a driving tire.

3. The heavy-duty dual-axial electric drive axle according to claim 2, characterized in that: The wheel-side reducer (5) is connected to the axle housing (1) via an end flange (13).

4. The heavy-duty dual-axial electric drive axle according to claim 1, characterized in that: It also includes a DC brake (6), which is located in the accommodation space and connected to the drive shaft (3).

5. The heavy-duty dual-axial electric drive axle according to claim 1, characterized in that: Both ends of the drive shaft (3) are fixedly connected to the axle housing (1) via bearings (31).

6. The heavy-duty dual-axial electric drive axle according to claim 1, characterized in that: The inner wall of the axle housing (1) is provided with an iron core support rib (11), and the motor stator (2) is mounted on the iron core support rib (11).

7. The heavy-duty dual-axial electric drive axle according to claim 1, characterized in that: The axle housing (1) is a cylinder and is made of seamless steel pipe parts.

8. The heavy-duty dual-axial electric drive axle according to claim 1, characterized in that: The axle housing (1) is provided with a ventilation hole (12).

9. A heavy-duty electric drive wheel set, characterized in that: It comprises a driving tire and a heavy-duty dual-axial electric drive axle as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the heavy-duty electric drive wheel set as described in claim 9.

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