Electric drive axle and mining dump truck

Abstract

The utility model discloses an electric drive axle and a mining dump truck. The electric drive axle comprises an axle housing of a cylindrical structure, two first-stage speed reduction assemblies, two half shaft sleeve assemblies, two hub speed reduction assemblies, two half shafts and a motor wire holder. The two first-stage speed reduction assemblies are mounted in the axle housing; the two half shaft sleeve assemblies are installed on the shaft faces of the two sides of the axle housing respectively. The two hub reduction assemblies are located on the two sides of the axle housing respectively, the output ends of the hub reduction assemblies are connected with the tire assemblies, and the fixed ends of the hub reduction assemblies are connected with the half axle sleeve assemblies. The two half shafts are installed in the two half shaft sleeve assemblies respectively, one ends of the half shafts are connected with the output end of the first-stage speed reduction assembly, and the other ends of the half shafts are connected with the input end of the hub speed reduction assembly. And the motor junction box is arranged on the outer circumferential surface of the axle housing. The integrated axle housing is simple in structure, drive axle bearing point positions are integrated on the integrated axle housing, the influence of deformation of a drive axle system on an internal power transmission line is reduced, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to an electric drive axle and belongs to the technical field of mining dump trucks. Background Art

[0002] Domestic mining is developing towards large-scale and intelligent directions, and off-road mining dump trucks also need to be upgraded to higher load capacities. However, the current drive axles of off-road mining dump trucks are limited by domestic R&D and production capabilities, and there are no mechanical drive axles with greater load-bearing capacity.

[0003] At present, the electric drive axle solution is mainly a multi-stage structure for installing the drive motor, and the overall structure is complex. Summary of the invention

[0004] The utility model provides a novel electric drive axle with a simple structure. The drive axle bearing points are integrated into an integral axle housing, thereby reducing the influence of the deformation of the drive axle system on the internal power transmission line and improving the reliability.

[0005] The utility model is implemented according to the following technical solutions:

[0006] In a first aspect, the utility model provides an electric drive axle, comprising:

[0007] Axle housing with cylindrical structure;

[0008] Two first-stage reduction assemblies are installed inside the axle housing;

[0009] Two half-axle sleeve assemblies are respectively mounted on the axial surfaces on both sides of the axle housing;

[0010] Two wheel-side reduction assemblies are respectively located on both sides of the axle housing, the output end of the wheel-side reduction assembly is connected to the tire assembly, and the fixed end of the wheel-side reduction assembly is connected to the half-axle sleeve assembly;

[0011] Two half shafts are respectively installed in the two half shaft sleeve assemblies, one end of the half shaft is connected to the output end of the primary reduction assembly, and the other end of the half shaft is connected to the input end of the wheel side reduction assembly;

[0012] The motor terminal block is mounted on the outer circumferential surface of the bridge housing.

[0013] In some embodiments, the first-stage reduction assembly is composed of a first-stage planetary gear and a motor connected by bolts; the motor is located on the inner side of the bridge housing, the first-stage planetary gear is located at the end of the bridge housing, and the input end of the first-stage planetary gear is connected to the output end of the motor.

[0014] In some embodiments, the wheel reduction assembly is composed of a wheel reduction planetary gear and a drum brake with integrated braking.

[0015] In some embodiments, the bridge housing is an integral bridge housing, and the outer peripheral surface of the bridge housing is integrated with the suspension, the horizontal tie rod, and the A-frame connection structure.

[0016] In some embodiments, the inner side of the bridge housing is integrated with a mounting flange for assembling the first-stage reduction assembly and a motor tail support seat.

[0017] In some embodiments, both ends of the half shaft are connected to the wheel reduction assembly and the primary reduction assembly through splines respectively.

[0018] In some embodiments, the half-axle sleeve assembly is fixed to the bridge housing by a circle of bolts.

[0019] In some embodiments, the tire assembly includes a wheel hub and a tire, the output end of the wheel reduction assembly is connected to the wheel hub, and the tire is mounted on the wheel hub.

[0020] In some embodiments, a brake air chamber is installed on the outer wall of the half-axle sleeve assembly, and is connected to the integrated drum brake in the wheel-side reduction assembly through a camshaft.

[0021] In a second aspect, the utility model provides a mining dump truck equipped with the above-mentioned electric drive axle.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model adopts an integral bridge housing, and the outer side of the bridge housing integrates suspension, tie rod, and A-frame connection structure, which is the main bearing component of the drive axle, simplifies the overall structure of the drive axle, and improves the reliability of the drive axle. The primary reduction assembly is installed on the inner side of the bridge housing, and deforms at the same time as the bridge housing is subjected to force, and is not affected by the deformation of the drive axle, ensuring the high-speed and stable operation of the motor. The two ends of the half shaft are connected to the wheel-side reduction assembly and the primary reduction assembly through splines, respectively, to ensure power transmission while achieving relative independence of the primary reduction assembly and the wheel-side reduction assembly, reducing the error caused by deformation and improving transmission reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0025] In the attached picture:

[0026] Figure 1 The overall schematic diagram of the electric drive axle of the utility model Figure 1 ;

[0027] Figure 2 The overall schematic diagram of the electric drive axle of the utility model Figure 2 ;

[0028] Figure 3 It is a cross-sectional view of the electric drive axle of the utility model.

[0029] Figure identification: 1. wheel-side reduction assembly, 1-1. wheel-side reduction planetary gear, 1-2. integrated drum brake, 2. first-stage reduction assembly, 2-1. first-stage planetary gear, 2-2. motor, 3-half-axle sleeve assembly, 4-brake air chamber, 5-bridge housing, 6-camshaft, 7-motor terminal block, 8-half-axle.

[0030] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1 , Figure 2 , Figure 3As shown, an electric drive axle comprises a cylindrical bridge housing 5, two primary reduction assemblies 2, two half-axle sleeve assemblies 3, two wheel-side reduction assemblies 1, two half-axles 8 and a motor terminal block 7; the two primary reduction assemblies 2 are installed inside the bridge housing 5; the two half-axle sleeve assemblies 3 are respectively installed on the axial surfaces on both sides of the bridge housing 5; the two wheel-side reduction assemblies 1 are respectively located on both sides of the bridge housing 5, the output end of the wheel-side reduction assembly 1 is connected to the tire assembly, and the fixed end of the wheel-side reduction assembly 1 is connected to the half-axle sleeve assembly 3; the two half-axles 8 are respectively installed in the two half-axle sleeve assemblies 3, one end of the half-axle 8 is connected to the output end of the primary reduction assembly 2, and the other end of the half-axle 8 is connected to the input end of the wheel-side reduction assembly 1; the motor terminal box 7 is installed on the outer circumferential surface of the bridge housing 5.

[0035] Further solutions, such as Figure 3 As shown, the primary reduction assembly 2 is composed of a primary planetary gear 2-1 and a motor 2-2 connected by bolts; the motor 2-2 is located inside the bridge housing 5, the primary planetary gear 2-1 is located at the end of the bridge housing 5, and the input end of the primary planetary gear 2-1 is connected to the output end of the motor 2-2. Since the primary reduction assembly 2 is installed inside the bridge housing 5, it deforms at the same time as the bridge housing 5 is stressed, and is not affected by the deformation of the drive axle, ensuring that the motor 2-2 runs smoothly at high speed.

[0036] Further solutions, such as Figure 1 , Figure 2 , Figure 3 As shown, the wheel-side reduction assembly 1 is composed of a wheel-side reduction planetary gear 1-1 and a travel-parking integrated drum brake 1-2. A brake air chamber 4 is installed on the outer wall of the half-axle sleeve assembly 3, which is connected to the travel-parking integrated drum brake 1-2 through a camshaft 6. The brake air chamber 4 provides an air source to drive the camshaft 6 to rotate, and compresses the friction plate group in the travel-parking integrated drum brake 1-2, thereby braking the moving vehicle.

[0037] Further solutions, such as Figure 1 , Figure 2 As shown in FIG3 , the axle housing 5 is an integral axle housing, and the suspension, tie rod, and A-frame connection structure are integrated on the outer peripheral surface of the axle housing 5. The mounting flange for assembling the primary reduction assembly 2 and the motor tail support seat are integrated on the inner side of the axle housing 5. The axle housing 5 is the main bearing component of the drive axle, which simplifies the overall structure of the drive axle and improves the reliability of the drive axle.

[0038] Further solutions, such as Figure 3 As shown, both ends of the half shaft 8 are connected to the wheel-side reduction assembly 1 and the primary reduction assembly 2 through splines, respectively, so as to ensure power transmission while realizing the relative independence of the primary reduction assembly 2 and the wheel-side reduction assembly 1, reduce the error caused by deformation, and improve transmission reliability.

[0039] Further solutions, such as Figure 1 , Figure 2As shown in Figure 3, the half-axle sleeve assembly 3 is fixed to the bridge housing 5 by a circle of bolts. The tire assembly includes a wheel hub and a tire. The output end of the wheel side reduction assembly 1 is connected to the wheel hub, and the tire is installed on the wheel hub.

[0040] The utility model also provides a mining dump truck, which is equipped with the electric drive axle.

[0041] In summary, the utility model proposes an electric drive axle for a mining dump truck, including an integral bridge housing, two primary reducer assemblies, two half-axles, and two wheel-side reduction assemblies. The primary reducer assembly includes a motor and a primary planetary gear assembly connected to the motor by bolts, the input end of the primary planetary gear assembly is connected to the motor shaft, and the primary reduction assembly is installed on the internal flange surface of the bridge housing by bolts; one end of the half-axle is connected to the output end of the primary reducer assembly; the input end of the wheel-side reduction assembly is transmission-connected to the other end of the half-axle; and the output end of the wheel-side reduction assembly is connected to the wheel hub. The utility model has a simple structure, and the load-bearing points of the drive axle are integrated into the integral bridge housing, which reduces the influence of the deformation of the drive axle system on the internal power transmission line and improves reliability.

[0042] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0043] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

[0044] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. An electric drive axle, characterized in that: include: Axle housing with cylindrical structure; Two first-stage reduction assemblies are installed inside the axle housing; Two half-axle sleeve assemblies are respectively mounted on the axial surfaces on both sides of the axle housing; Two wheel-side reduction assemblies are respectively located on both sides of the axle housing, the output end of the wheel-side reduction assembly is connected to the tire assembly, and the fixed end of the wheel-side reduction assembly is connected to the half-axle sleeve assembly; Two half shafts are respectively installed in the two half shaft sleeve assemblies, one end of the half shaft is connected to the output end of the primary reduction assembly, and the other end of the half shaft is connected to the input end of the wheel side reduction assembly; The motor terminal block is mounted on the outer circumferential surface of the bridge housing.

2. The electric drive axle according to claim 1, characterized in that: The first-stage reduction assembly is composed of a first-stage planetary gear and a motor connected by bolts; the motor is located on the inner side of the bridge housing, the first-stage planetary gear is located at the end of the bridge housing, and the input end of the first-stage planetary gear is connected to the output end of the motor.

3. The electric drive axle according to claim 1, characterized in that: The wheel-side reduction assembly consists of a wheel-side reduction planetary gear and a running-parking integrated drum brake.

4. The electric drive axle according to claim 1, characterized in that: The bridge housing adopts an integral bridge housing, and the outer peripheral surface of the bridge housing is integrated with a suspension, a horizontal tie rod, and an A-frame connection structure.

5. The electric drive axle according to claim 1, characterized in that: The inner side of the bridge housing is integrated with a mounting flange for assembling the first-stage reduction assembly and a motor tail support seat.

6. The electric drive axle according to claim 1, characterized in that: The two ends of the half shaft are connected to the wheel side reduction assembly and the primary reduction assembly through splines respectively.

7. The electric drive axle according to claim 1, characterized in that: The half-axle sleeve assembly is fixed to the bridge housing by a circle of bolts.

8. The electric drive axle according to claim 1, characterized in that: The tire assembly comprises a wheel hub and a tire. The output end of the wheel-side reduction assembly is connected to the wheel hub, and the tire is mounted on the wheel hub.

9. The electric drive axle according to claim 1, characterized in that: A brake air chamber is installed on the outer wall of the half-axle sleeve assembly and is connected to the integrated drum brake in the wheel-side reduction assembly through a camshaft.

10. A mining dump truck, characterized in that: The electric drive axle according to any one of claims 1 to 9 is installed.

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