Electric engineering vehicle drive axle assembly and electric engineering vehicle

Abstract

The utility model provides an electric engineering vehicle drive axle assembly and an electric engineering vehicle, which comprise an axle housing assembly, a main speed reducer and a power output device, the main speed reducer and the power output device are arranged on the axle housing assembly, and the main speed reducer comprises an input shaft connected with the power output device. The high-speed-stage sun gear is arranged on the input shaft, the high-speed-stage planet carrier is arranged at one end of the first transmission shaft, the high-speed-stage planet gear is rotatably arranged on a high-speed-stage planet shaft of the high-speed-stage planet carrier and meshed with the high-speed-stage sun gear, and the high-speed-stage inner gear ring is arranged on the axle housing assembly and meshed with the high-speed-stage planet gear. A low-speed sun gear, a low-speed planet carrier arranged at one end of the second transmission shaft, a low-speed planet gear rotationally arranged on a low-speed planet shaft of the low-speed planet carrier and meshed with the low-speed sun gear, and a low-speed inner gear ring arranged on the axle housing assembly and meshed with the low-speed planet gear are arranged at the other end of the first transmission shaft; the reduction ratio is large, a transmission chain is short, the transmission efficiency is more efficient and reliable, and the size is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of electric engineering vehicles, in particular to an electric engineering vehicle drive axle assembly and an electric engineering vehicle. Background Art

[0002] The main reducer of the axle is an important part of the automobile transmission system. It converts the high speed and low torque output by the engine into the low speed and high torque required by the vehicle, thereby driving the wheels to meet the needs of vehicle driving. However, the existing main reducer is mainly connected through traditional gear transmission. In order to ensure a large reduction ratio, it often needs to set up multi-stage transmission, and the transmission chain is long, resulting in a large volume and occupying a large space, which is not suitable for four-wheel independent drive vehicles. Utility Model Content

[0003] In view of this, an object of the present invention is to provide an electric engineering vehicle drive axle assembly and an electric engineering vehicle to solve the above problems.

[0004] The utility model adopts the following scheme:

[0005] The present application provides a drive axle assembly for an electric engineering vehicle, comprising an axle housing assembly, a main reducer and a power output device arranged on the axle housing assembly,

[0006] The main reducer includes an input shaft connected to the power output device, a high-speed sun gear arranged on the input shaft, a high-speed planetary carrier arranged at one end of the first transmission shaft, a high-speed planetary gear rotatably arranged on the high-speed planetary shaft of the high-speed planetary carrier and meshing with the high-speed sun gear, a high-speed internal gear ring arranged on the bridge housing assembly and meshing with the high-speed planetary gear, a low-speed sun gear arranged at the other end of the first transmission shaft, a low-speed planetary carrier arranged at one end of the second transmission shaft, a low-speed planetary gear rotatably arranged on the low-speed planetary shaft of the low-speed planetary carrier and meshing with the low-speed sun gear, and a low-speed internal gear ring arranged on the bridge housing assembly and meshing with the low-speed planetary gear.

[0007] Furthermore, it also includes a wheel-side reducer connected to the other end of the second transmission shaft.

[0008] Furthermore, it also includes a caliper disc brake arranged on the bridge housing assembly.

[0009] Furthermore, the power output device is a four-quadrant hydraulic drive motor.

[0010] The utility model also provides an electric engineering vehicle, which has four independently driven wheels, and each wheel is independently connected to the drive axle assembly.

[0011] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0012] The utility model provides a drive axle assembly for an electric engineering vehicle, wherein the main reducer is connected by a mechanical gear structure of a low-speed planetary gear set and a high-speed planetary gear set, has a large reduction ratio, a short transmission chain, a more efficient and reliable transmission efficiency, a smaller volume, a more flexible spatial arrangement and is no longer limited by the transmission system structure of a traditional vehicle, has a reasonable speed ratio distribution and a stronger carrying capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a schematic cross-sectional structure diagram of a drive axle assembly of an electric engineering vehicle according to an embodiment of the utility model;

[0015] Icons: wheel-side reducer 1, caliper disc brake 2, bridge housing assembly 3, low-speed planetary carrier 4, low-speed planetary shaft 5, low-speed planetary gear 6, main reducer 7, high-speed planetary carrier 8, high-speed internal gear ring 9, high-speed planetary gear 10, high-speed planetary shaft 11, input shaft 12, four-quadrant hydraulic drive motor 13, high-speed sun gear 14, first transmission shaft 15, low-speed sun gear 16, low-speed internal gear ring 17, second transmission shaft 18, rotating bearing 19. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0017] Example

[0018] Combination Figure 1 As shown, this embodiment provides a drive axle assembly for an electric engineering vehicle, including an axle housing assembly 3, a main reducer 7 and a power output device arranged on the axle housing assembly 3,

[0019] The main reducer 7 includes an input shaft 12 connected to the power output device, a high-speed sun gear 14 arranged on the input shaft 12, a high-speed planetary carrier 8 arranged at one end of a first transmission shaft 15, a high-speed planetary gear 10 rotatably arranged on a high-speed planetary shaft 11 of the high-speed planetary carrier 8 and meshing with the high-speed sun gear 14, a high-speed internal gear ring 9 arranged on the bridge housing assembly 3 and meshing with the high-speed planetary gear 10, a low-speed sun gear 16 is arranged at the other end of the first transmission shaft 15, a low-speed planetary carrier 4 is arranged at one end of a second transmission shaft 18, a low-speed planetary gear 6 rotatably arranged on a low-speed planetary shaft 5 of the low-speed planetary carrier 4 and meshing with the low-speed sun gear 16, and a low-speed internal gear ring 17 arranged on the bridge housing assembly 3 and meshing with the low-speed planetary gear 6.

[0020] The main reducer 7 is connected by a mechanical gear structure of a low-speed planetary gear set and a high-speed planetary gear set. It has a large reduction ratio, a short transmission chain, a more efficient and reliable transmission efficiency, a smaller size, and a more flexible spatial layout. It is no longer limited by the transmission system structure of traditional vehicles, has a reasonable speed ratio distribution, and has a stronger carrying capacity.

[0021] Specifically, in this embodiment, the main reducer 7, a power output device, a wheel reducer 1 and a caliper disc brake 2 are included. The main reducer 7 includes an input shaft 12 connected to the power output device, a high-speed sun gear 14 arranged on the input shaft 12, a high-speed planetary carrier 8 arranged at one end of a first transmission shaft 15, a high-speed planetary gear 10 rotatably arranged on a high-speed planetary shaft 11 of the high-speed planetary carrier 8 and meshing with the high-speed sun gear 14, a high-speed internal gear ring 9 arranged on the bridge housing assembly 3 and meshing with the high-speed planetary gear 10, a low-speed sun gear 16 arranged at the other end of the first transmission shaft 15, a low-speed planetary carrier 4 arranged at one end of a second transmission shaft 18, a low-speed sun gear 16 rotatably arranged on a low-speed planetary shaft 5 of the low-speed planetary carrier 4 and meshing with the low-speed sun gear 16, and a low-speed internal gear ring 17 arranged on the bridge housing assembly 3 and meshing with the low-speed planetary gear 6. The other end of the second transmission shaft 18 is connected to the wheel-side reducer 1. The high-speed planetary shaft 11 and the low-speed planetary shaft 5 are provided with rotating bearings 19, and the sealing is ensured. The power output device is a four-quadrant hydraulic drive motor 13, which is connected to the input shaft 12 through a spline to output power, which is reduced by the two-stage planetary gear of the main reducer 7 and then reduced by the wheel-side reducer 1 to be transmitted to the wheels. The caliper disc brake 2 can output braking force during emergency braking to ensure the safety of electric engineering machinery during driving. At the same time, when the vehicle brakes, the braking energy can be transferred from the wheel through the caliper disc brake 2 and the main reducer 7 back to the four-quadrant hydraulic drive motor 13 for energy recovery and utilization, so as to output power for the next driving.

[0022] The power outputted by the four-quadrant hydraulic drive motor 13 is transmitted to the wheel reducer 1 and finally to the wheels through the input shaft 12, the high-speed sun gear 14, the high-speed planetary gear 10, the first transmission shaft 15, the low-speed sun gear 16, the low-speed sun gear 16, the second transmission shaft 18 in sequence. The main reducer 7 is connected by a mechanical gear structure of a low-speed planetary gear set and a high-speed planetary gear set, with a large reduction ratio, a short transmission chain, a more efficient and reliable transmission efficiency, a smaller size, and a more flexible spatial arrangement, which is no longer limited by the transmission system structure of traditional vehicles, and is more suitable for electric engineering vehicles with four-wheel independent drive.

[0023] The utility model also provides an electric engineering vehicle, which is independently driven by four wheels, and each wheel is independently connected to the drive axle assembly. The main reducer 7 is smaller in size, and the space arrangement is more flexible and no longer limited by the transmission system structure of traditional vehicles.

[0024] The above are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like 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 invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

Claims

1. A drive axle assembly for an electric engineering vehicle, comprising an axle housing assembly, a main reducer and a power output device arranged on the axle housing assembly, characterized in that: The main reducer includes an input shaft connected to the power output device, a high-speed sun gear arranged on the input shaft, a high-speed planetary carrier arranged at one end of the first transmission shaft, a high-speed planetary gear rotatably arranged on the high-speed planetary shaft of the high-speed planetary carrier and meshing with the high-speed sun gear, a high-speed internal gear ring arranged on the bridge housing assembly and meshing with the high-speed planetary gear, a low-speed sun gear arranged at the other end of the first transmission shaft, a low-speed planetary carrier arranged at one end of the second transmission shaft, a low-speed planetary gear rotatably arranged on the low-speed planetary shaft of the low-speed planetary carrier and meshing with the low-speed sun gear, and a low-speed internal gear ring arranged on the bridge housing assembly and meshing with the low-speed planetary gear.

2. The electric engineering vehicle drive axle assembly according to claim 1, characterized in that: It also includes a wheel-side reducer connected to the other end of the second transmission shaft.

3. The electric engineering vehicle drive axle assembly according to claim 1, characterized in that: Also included is a caliper disc brake arranged on the bridge housing assembly.

4. The electric engineering vehicle drive axle assembly according to any one of claims 1 to 3, characterized in that: The power output device is a four-quadrant hydraulic drive motor.

5. An electric engineering vehicle with four-wheel independent drive, characterized in that: Each wheel is independently connected to the drive axle assembly as claimed in claim 4.

Images