Electric drive axle, wheel set and vehicle

Abstract

The utility model discloses an electric drive axle, a wheel set and a vehicle, and relates to the field of vehicle drive.On one hand, the axle comprises a motor shell, a drive motor, a speed reducer and a driven axle, the motor shell is provided with a containing cavity, and the motor shell is used for being connected with an upper structure of a carrier; the speed reducer is located outside the containing cavity and connected with the motor shell, and the speed reducer is used for being in driving connection with a driving tire. The driving motor is arranged in the accommodating cavity and is in transmission connection with the accommodating cavity; the driven axle is connected to the other end, away from the speed reducer, of the motor shell and used for being connected with a driven tire. The driving motor and the speed reducer are in transmission connection to form a whole, and the motor shell connected outside the driving motor in a sleeving manner is connected with the driven axle, so that the whole structure is more stable, the electric driving axle formed by the driving motor and the speed reducer realizes walking, the problem of high cost of a hydraulic element is solved, and the service life of the electric driving axle is prolonged. And meanwhile, the risk of environmental pollution caused by hydraulic leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the field of vehicle driving, in particular to an electric drive axle, a wheel set and a vehicle. Background Art

[0002] With the development of construction technology for high-speed railway bridges and cross-sea bridges, the use of prefabricated box beam erection methods is very common due to the influence of weather, environment, manpower and other construction factors. Therefore, the construction of prefabricated beam yards has become a prerequisite for line construction. Tire-type transporters are indispensable construction equipment in prefabricated beam yards and are used to transport prefabricated box beams.

[0003] In the prior art, the wheel drive of the tire transporter is mostly driven by a hydraulic motor. Due to the irregularity of the motor size, the wheel drive axle structure is hollow and huge, and the structural bearing capacity is greatly reduced.

[0004] The drive motor is driven by a drive motor, which matches the speed and transmits torque between the prime mover and the working machine or actuator through a reducer and a differential to reduce the speed and increase the torque. Since the drive motor, reducer, and differential are fixedly connected and installed with the vehicle housing through a housing, the connection structure is complex, the number of parts is large, the volume is large and heavy, and it takes up a lot of space. The axle housing casting and processing are inconvenient, and the installation operation is cumbersome. Utility Model Content

[0005] In view of the defects existing in the prior art, the purpose of the present utility model is to provide an electric drive axle, a wheel set and a vehicle to solve the problems of complex axle structure and poor overall load-bearing capacity in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] In one aspect, the present application provides an electric drive axle, comprising:

[0008] A motor housing, which is used to be connected to the upper structure of the transporter, and the motor housing has a receiving cavity;

[0009] A reducer, which is located outside the accommodating cavity and connected to the motor housing, and the reducer is used for driving connection with the driving tire;

[0010] A driving motor is disposed in the accommodating cavity and is drivingly connected to the reducer;

[0011] The driven axle is connected to the other end of the motor housing away from the reducer and is used to be connected to the driven tire.

[0012] In some optional embodiments, the motor housing is cylindrical, and the reducer and the driven axle are respectively connected to two axial ends of the motor housing.

[0013] In some optional embodiments, two axial ends of the motor housing are respectively provided with a driving flange for connecting to the reducer and a driven flange for connecting to a driven axle.

[0014] In some optional embodiments, a reducer flange is provided at the fixed end of the reducer, the reducer flange is connected to the transition flange, and is connected to the driving flange through the transition flange.

[0015] In some optional embodiments, a fixing flange is provided on the driven axle, and the fixing flange is fixedly connected to the driven flange by bolts.

[0016] In some optional embodiments, the reducer is connected to the drive motor via a spline shaft transmission, and an active rotating end flange is provided at the driving end of the reducer for driving connection with the drive tire.

[0017] In some optional embodiments, heat dissipation holes and wiring holes are provided at intervals on the side walls of the motor housing.

[0018] In a second aspect, the present application further provides an electric drive wheel set, comprising a driving tire, a driven tire and any of the above-mentioned electric drive axles.

[0019] In some optional embodiments, the driving tire is connected to the active rotating end flange on the reducer via a driving rim flange, and the driven tire is connected to the driven rotating end flange on the driven axle via a driven rim flange.

[0020] In a third aspect, the present application also provides a vehicle comprising any of the above-mentioned electric drive wheel sets.

[0021] Compared with the prior art, the advantages of the utility model are:

[0022] The driving motor and the reducer are connected to form a whole, and the motor housing is sleeved and connected to the driven axle, so that the overall structure is more stable. The motor housing not only provides a protective structure for the driving motor, but also serves as a part of the axle housing, ensuring that the overall axle housing has greater strength and rigidity, meeting the design requirements of the allowable bending stress of the axle housing, and realizing running through the electric drive axle formed by the driving motor and the reducer, which not only solves the problem of high cost of hydraulic components, but also makes maintenance easier, while avoiding the risk of environmental pollution caused by hydraulic leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the cross-sectional structure of an electric drive axle of the utility model;

[0025] Figure 2 for Figure 1 Schematic diagram of the transmission cross-section connection between the medium speed reducer and the drive motor;

[0026] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the motor housing;

[0027] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of an electric drive wheel set.

[0028] In the figure: 1. Motor housing; 11. Driving flange; 12. Driven flange; 13. Heat dissipation hole; 14. Wiring hole; 2. Driving motor; 3. Reducer; 31. Active rotating end flange; 32. Reducer flange; 4. Driven axle; 41. Fixed flange; 42. Driven rotating end flange; 5. Transition flange; 61. Driving tire; 62. Driven tire; 7. Rim. DETAILED DESCRIPTION

[0029] 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.

[0030] The following is a further detailed description of an embodiment of an electric drive axle, a wheel set and a vehicle of the utility model in conjunction with the accompanying drawings.

[0031] First, as Figure 1 As shown, the present application provides an electric drive axle, including a motor housing 1, a drive motor 2, a reducer 3 and a driven axle 4. The drive motor 2 and the reducer 3 are connected to form a whole by transmission, and the motor housing 1 is sleeved and connected to the driven axle 4 outside the drive motor 2, so that the overall structure is more stable, the load-bearing capacity is better, and the torsion resistance and bending moment resistance are strong.

[0032] Specifically, the motor housing 1 has a accommodating cavity, and the motor housing 1 is used to be connected to the upper structure of the transport machine; the reducer 3 is located outside the accommodating cavity and is connected to the motor housing 1, and the reducer 3 is used to be connected to the driving tire 61; the driving motor 2 is arranged in the accommodating cavity and is connected to the driving motor 2; the driven axle 4 is connected to the other end of the motor housing 1 away from the reducer 3, and is used to be connected to the driven tire 62.

[0033] It is understandable that Figure 2 As shown, the reducer 3 and the drive motor 2 are connected to form a whole, and in the embodiment of the present application, the reducer 3 and the drive motor 2 both use conventional, standard models of motors and reducers. Compared with the hydraulic drive method in the prior art, it not only solves the problem of high cost of hydraulic components, but also makes maintenance easier, while avoiding the risk of environmental pollution caused by hydraulic leakage. In addition, the driving tire 61 and the driven tire 62 are connected to the motor housing 1 through the reducer 3 and the driven axle 4, and the motor housing 1 is used to connect to the upper structure of the transporter, so that the overall space layout of the axle is more optimized and the load-bearing capacity is stronger.

[0034] In some optional embodiments, such as Figure 3 As shown, the motor housing 1 is cylindrical, and the reducer 3 and the driven axle 4 are respectively connected to the two ends of the motor housing 1 in the axial direction.

[0035] It can be understood that the size of the cylindrical motor housing 1 is adapted to the size of the drive motor 2, and the housing material is high-quality structural steel, which ensures that the overall bridge housing has greater strength and rigidity and meets the design requirements for the allowable bending stress of the bridge housing. In addition, the cylindrical motor housing 1 is easy to cast, compact in structure, small in size, light in weight, and easy to install and operate.

[0036] Furthermore, two axial ends of the motor housing 1 are respectively provided with a driving flange 11 for connecting to the reducer 3 and a driven flange 12 for connecting to the driven axle 4 .

[0037] That is to say, the reducer 3 and the driven axle 4 are both connected to the motor housing 1 by means of flanges and bolts, which is convenient for installation and disassembly.

[0038] Furthermore, a reducer flange 32 is provided at the fixed end of the reducer 3 , and the reducer flange 32 is connected to the transition flange 5 , and is connected to the driving flange 11 through the transition flange 5 .

[0039] The reducer 3 is firstly connected to the transition flange 5 by bolts, and then connected to the motor housing 1 through the transition flange 5, thereby reserving installation space for the connection with the motor housing 1 through the transition flange.

[0040] It can be understood that the flanges are fixed together by bolts.

[0041] In some optional embodiments, a fixing flange 41 is provided on the driven axle 4 , and the fixing flange 41 is fixedly connected to the driven flange 12 by bolts.

[0042] That is to say, the driven axle 4 is fixedly connected to the motor housing 1 via the fixing flange 41 and the driven flange 12 .

[0043] Since the reducer 3 and the driven axle 4 are connected to the motor housing 1 through flange surface sealing, the flange connection structure is easy to operate, has good connection sealing performance, and has high connection strength, so that the electric drive axle has good integrity and high structural operation stability.

[0044] The motor housing 1 not only provides a protective structure for the drive motor 2, but also serves as a part of the axle housing. The reducer 3, drive motor 2, driven axle 4, and motor housing 1 are all coaxially connected through flanges to ensure that the overall axle housing has greater strength and rigidity and meets the design requirements for allowable bending stress of the axle housing.

[0045] In some optional embodiments, the reducer 3 is drivingly connected to the drive motor 2 via a spline shaft, and an active rotating end flange 31 is provided at the driving end of the reducer 3 for drivingly connecting to the drive tire 61 .

[0046] It can be understood that the output end of the driving motor 2 is processed with an internal spline, and the high-speed shaft of the reducer 3 is processed with an external spline that cooperates with the internal spline. The driving connection between the driving motor 2 and the reducer 3 is realized through the cooperation of the internal spline and the external spline. The driving end of the reducer 3 is provided with an active rotating end flange 31, and the driving tire 61 is installed on the active rotating end flange 31 through the rim flange, so as to drive the driving tire 61 to travel. The driven tire 62 connected to the driven axle 4 is driven to follow through the driving tire 61.

[0047] In some optional embodiments, heat dissipation holes 13 and wiring holes 14 are spaced apart on the side wall of the motor housing 1 .

[0048] It can be understood that the heat dissipation hole 13 is used for heat dissipation of the drive motor 2, and the wiring hole 14 is used for wiring of the drive motor 2. In this example, the heat dissipation hole 13 and the wiring hole 14 are both rectangular holes.

[0049] Second, as Figure 4 As shown, the present application also provides an electric drive wheel set, including a driving tire 61, a driven tire 62 and any of the above-mentioned electric drive axles.

[0050] Specifically, the motor housing 1 has a accommodating cavity, and the motor housing 1 is used to be connected to the upper structure of the transport machine; the reducer 3 is located outside the accommodating cavity and is connected to the motor housing 1, and the reducer 3 is drivingly connected to the driving tire 61; the driving motor 2 is arranged in the accommodating cavity and is drivingly connected to the driving motor 2; the driven axle 4 is connected to the other end of the motor housing 1 away from the reducer 3, and is connected to the driven tire 62.

[0051] It can be understood that the driving tire 61 is driven by the reducer 3 and drives the driven tire 62 to follow. The electric drive axle formed by the driving motor 2 and the reducer 3 realizes the travel, which not only solves the problem of high cost of hydraulic components, but also makes maintenance easier, and avoids the risk of environmental pollution caused by hydraulic leakage. In addition, the driving tire 61 and the driven tire 62 are connected to the motor housing 1 through the reducer 3 and the driven axle 4, and the motor housing 1 is used to connect with the upper structure of the transporter, so that the overall spatial layout of the axle is more optimized and the load-bearing capacity is stronger.

[0052] In some optional embodiments, the driving tire 61 is connected to the active rotating end flange 31 on the reducer 3 via the driving rim flange, and the driven tire 62 is connected to the driven rotating end flange 42 on the driven axle 4 via the driven rim flange.

[0053] Here, the tire and the rim 7 are paired with standard models on the market, and after being assembled as a whole, they are connected with the active rotating end flange 31 and the driven rotating end flange 42 to be assembled into a single electric drive wheel set.

[0054] Compared with the hydraulic drive wheel set, the electric drive wheel set of the present application is not only durable and reliable, but also easy to purchase and assemble, with low cost and convenient maintenance. Due to the structural characteristics of the drive motor 2, the overall space layout of the axle can be more optimized, and the load-bearing capacity is stronger, which is suitable for running mechanisms that require higher load-bearing capacity. In addition, the performance of electrical components is more sustained and stable, and the performance is not greatly affected by wear. And by generating electricity and driving the motor through an external power supply or a generator set, the loss of power transmission process is greatly reduced, and fuel consumption is greatly reduced.

[0055] In a third aspect, the present application also provides a vehicle comprising any of the above-mentioned electric drive wheel sets.

[0056] In a tire-type transporter, multiple electric drive wheel sets can be used, and the gantry structure of the transporter is connected to the motor housing 1 of the electric drive wheel set. Since the driving tire 61 and the driven tire 62 are connected to the motor housing 1 through the reducer 3 and the driven axle 4, and the motor housing 1 is used to connect to the upper structure of the transporter, the overall space layout of the axle is more optimized and the load-bearing capacity is stronger. The electric drive transporter directly generates electricity and drives the motor through an external power supply or a generator set, which can greatly reduce the loss in the process of power transmission and greatly reduce fuel consumption. The fuel consumption of electric drive is reduced by at least 30% compared with liquid drive.

[0057] The utility model discloses an electric drive axle, a wheel set and a vehicle, wherein a driving motor 2 and a reducer 3 are connected to form a whole, and a motor housing 1 sleeved and connected to the outside of the driving motor 2 is connected to the driven axle 4, so that the overall structure is more stable, a driving tire 61 and a driven tire 62 are connected to the motor housing 1 through the reducer 3 and the driven axle 4, and the motor housing 1 is used to connect to the upper structure of the transporter, so that the overall space layout of the axle is more optimized and the load-bearing capacity is stronger; the motor housing 1 not only provides a protective structure for the driving motor 2, but also serves as a part of the axle housing, ensuring that the overall axle housing has It has great strength and rigidity, meeting the design requirements of the allowable bending stress of the bridge housing; the cylindrical motor housing 1 is easy to cast, compact in structure, small in size, light in weight, and easy to install and operate; the reducer 3 and the driven axle 4 are connected to the motor housing 1 through flange face sealing, and the flange connection structure is easy to operate, has good connection sealing performance, and high connection strength, so that the electric drive axle has good integrity and high structural operation stability; the electric drive axle formed by the drive motor 2 and the reducer 3 realizes running, which not only solves the problem of high cost of hydraulic components, but also makes it easier to maintain, while avoiding the risk of environmental pollution caused by hydraulic leakage.

[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. An electric drive axle, characterized in that: include: A motor housing (1) used for connecting to the upper structure of a transport machine, wherein the motor housing (1) has a receiving cavity; A reducer (3), which is located outside the accommodating cavity and connected to the motor housing (1), and the reducer (3) is used to be drivingly connected to the driving tire (61); A driving motor (2), which is disposed in the accommodating cavity and is drivingly connected to the reducer (3); A driven axle (4) is connected to the other end of the motor housing (1) away from the reducer (3) and is used to be connected to a driven tire (62).

2. The electric drive axle according to claim 1, characterized in that: The motor housing (1) is cylindrical, and the reducer (3) and the driven axle (4) are respectively connected to the two axial ends of the motor housing (1).

3. The electric drive axle according to claim 2, characterized in that: A driving flange (11) for connecting to the reducer (3) and a driven flange (12) for connecting to a driven axle (4) are respectively provided at two axial ends of the motor housing (1).

4. The electric drive axle according to claim 3, characterized in that: The fixed end of the reducer (3) is provided with a reducer flange (32), and the reducer flange (32) is connected to the transition flange (5), and is connected to the driving flange (11) through the transition flange (5).

5. The electric drive axle according to claim 3, characterized in that: The driven axle (4) is provided with a fixing flange (41), and the fixing flange (41) is fixedly connected to the driven flange (12) by bolts.

6. The electric drive axle according to claim 1, characterized in that: The reducer (3) is connected to the drive motor (2) via a spline shaft, and an active rotating end flange (31) is provided at the drive end of the reducer (3) for driving connection with the drive tire (61).

7. The electric drive axle according to claim 1, characterized in that: Heat dissipation holes (13) and wiring holes (14) are arranged at intervals on the side wall of the motor housing (1).

8. An electric drive wheel set, characterized in that: It comprises a driving tire (61), a driven tire (62) and an electric drive axle as claimed in any one of claims 1 to 7.

9. The electric drive wheel assembly according to claim 8, characterized in that: The driving tire (61) is connected to the active rotating end flange (31) on the reducer (3) via the driving wheel rim flange, and the driven tire (62) is connected to the driven rotating end flange (42) on the driven axle (4) via the driven wheel rim flange.

10. A vehicle, characterized in that: Comprising an electric drive wheel set as described in any one of claims 8-9.

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