Electric drive axle, tire roller and self-moving device
By employing a three-stage reduction and torque-increasing structure and a coaxially arranged electric drive axle design, the problems of radial compactness and insufficient speed ratio of the electric drive axle are solved, enabling the application of high-power-density motors and ultra-high torque output, thus improving versatility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN SANY HUAYUAN MASCH CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-07
AI Technical Summary
The existing electric drive axle has insufficient radial structural compactness, making it impossible to use high-power-density high-speed motors. Furthermore, its speed ratio is insufficient, failing to meet the demand for low-speed, high-torque output and resulting in poor versatility.
It adopts a three-stage reduction and torque-increasing structure, including a gear reducer and a two-stage planetary reducer. The motor output is reduced through three stages before transmitting power. Combined with the coaxial arrangement and detachable half-shaft design, it can adapt to engineering machinery with different tire distribution distances.
This technology improves the radial structural compactness of the electric drive axle, enables the use of high-power-density motors, increases the speed ratio, achieves ultra-high torque output, and enhances the versatility of applications.
Smart Images
Figure CN224465646U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of drive axle technology, specifically to an electric drive axle, and also to a tire roller and a self-moving device. Background Technology
[0002] An electric drive axle is a mechanism located at the end of a transmission system that transmits the speed and torque of a drive motor to the drive wheels. It typically consists of a drive motor, a reducer, a differential, and a drive axle housing.
[0003] A common arrangement for electric drive axles is that the drive motor shaft and the output shaft are coaxial. However, the motor output shaft is directly connected to the differential, which limits the motor speed, prevents the use of high-power-density, high-speed motors, and results in a larger motor size, affecting the compactness of the radial structure. Moreover, the overall axle speed ratio is less than 200, making it unsuitable for construction machinery requiring low-speed, high-torque output.
[0004] In addition, traditional electric drive axles are only suitable for construction machinery with large or small tire spacing, and have poor versatility. Utility Model Content
[0005] The purpose of this application is to provide an electric drive axle, a tire roller, and a self-moving device to improve the radial structural compactness of the electric drive axle, while increasing the speed ratio of the electric drive axle to achieve ultra-high torque output at the wheel ends.
[0006] To achieve the above objectives, this application provides the following technical solution:
[0007] An electric drive bridge, comprising:
[0008] An electric motor consists of a stator and a rotor;
[0009] A first reducer is disposed at one end of the motor. The input end of the first reducer is coaxially connected to the rotor. The output end of the first reducer is provided with an output shaft that is rotatably coaxially passing through the input end of the first reducer and the rotor. A first output end and a second output end are respectively formed at the two ends of the output shaft of the first reducer. The first output end is located at the end of the first reducer away from the motor, and the second output end is located at the end of the motor away from the first reducer.
[0010] The second reducer has its input end coaxially connected to the first output end, and its output end is used to be coaxially connected to the first wheel.
[0011] The third reducer has its input end coaxially connected to the second output end, and its output end is used to be coaxially connected to the second wheel.
[0012] The first reducer is a gear reducer; the second reducer and the third reducer are both two-stage planetary reducers.
[0013] Optionally, in the above-mentioned electric drive axle, a first half-shaft is detachably connected between the input end of the second reducer and the first output end;
[0014] The second half-shaft is detachably connected between the input end of the third reducer and the second output end.
[0015] Optionally, in the above-mentioned electric drive axle, the housing of the motor and the housing of the first reducer are integrated into a bridge housing, and the two ends of the bridge housing are respectively detachably connected to a first extension housing and a second extension housing, the first half-shaft is disposed in the first extension housing, and the second half-shaft is disposed in the second extension housing;
[0016] The first-stage fixed gear rings of the second reducer and the third reducer can be fixed to both ends of the axle housing or to the first extension housing and the second extension housing, respectively.
[0017] Optionally, in the above-mentioned electric drive axle, the output ends of the second reducer and the third reducer are both provided with a secondary rotating gear ring, and the secondary rotating gear ring is provided with a rim mounting surface.
[0018] Optionally, in the above-mentioned electric drive axle, a differential is detachably connected between the first output terminal and the input terminal of the second reducer.
[0019] Optionally, the above-mentioned electric drive axle further includes a brake, wherein the brake pads of the brake are disposed on at least one of the rotor, the output end of the first reducer, the output end of the second reducer, and the output end of the third reducer.
[0020] Optionally, in the above-mentioned electric drive axle, the axle housing is provided with cooling channels;
[0021] And / or, a cooling gap exists between the bridge housing and the stator;
[0022] And / or, the second-stage planetary carrier of the second reducer and the third reducer are integrated with the first-stage fixed gear ring.
[0023] In the electric drive axle provided in this application, the rotor of the motor undergoes primary speed reduction and torque amplification via a gear reducer; then, after two more stages of speed reduction and torque amplification via a second reducer through the first output end, it is coaxially connected to the first wheel; and after two more stages of speed reduction and torque amplification via a third reducer through the second output end, it is coaxially connected to the second wheel.
[0024] The components of the electric drive axle are arranged coaxially, and the motor output is transmitted to the wheels after a three-stage reduction and torque amplification process. This allows for the use of high-power-density, high-speed motors, reducing motor size and improving the radial structural compactness of the electric drive axle. Simultaneously, the three-stage reduction and torque amplification increases the speed ratio of the electric drive axle, achieving ultra-high torque output at the wheel ends.
[0025] Furthermore, the first reducer, primarily used for speed reduction, employs a gear reducer, which is simple in structure and saves costs. The second and third reducers both utilize two-stage planetary reducers, offering advantages such as a large reduction ratio, high output torque, and strong load-bearing capacity, achieving a good torque-increasing effect. Therefore, gear reducers and two-stage planetary reducers can achieve good speed reduction and torque increase while reducing costs. Moreover, this application utilizes the first reducer for primary speed reduction of the entire motor rotor. Compared to performing primary speed reduction at each of the rotor's two output ends separately, this reduces the number of reducer stages at the wheel ends, simplifies the structure, reduces axial space requirements, and lowers costs.
[0026] This application also provides a tire roller, including a front wheel and a rear wheel, and an electric drive axle for driving the front wheel and / or the rear wheel, wherein the electric drive axle is any of the electric drive axles described above. Since the electric drive axle described above has the aforementioned effects, the tire roller having the aforementioned electric drive axle has the same effects, therefore, it will not be described in detail here.
[0027] Optionally, in the above-mentioned tire roller, the tire roller includes at least two front drive units, each front drive unit including two front wheels and a front electric drive axle for driving the two front wheels; the at least two front drive units are rotatably connected to the front bogie via transition brackets;
[0028] At least two rear drive units, each rear drive unit including two rear wheels and a rear electric drive axle for driving the two rear wheels; both rear drive units are connected to a rear connecting frame, and follower wheels are provided between adjacent rear drive units.
[0029] This application also provides a self-moving device, including wheels and a drive system for driving the wheels, wherein the drive system is an electric drive axle as described in any of the above claims. Since the electric drive axle has the aforementioned effects, the self-moving device having the electric drive axle has the same effects, and therefore will not be described further herein. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be introduced below. The accompanying drawings described below are merely embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0031] Figure 1 A schematic diagram of the internal structure of an exemplary electric drive bridge, consistent with some embodiments of this application, is shown.
[0032] Figure 2 A schematic diagram of the external structure of an exemplary electric drive bridge, consistent with some embodiments of this application, is shown.
[0033] Figure 3 A schematic diagram of the internal structure of an exemplary electric drive bridge, consistent with other embodiments of this application, is shown.
[0034] Figure 4 A schematic diagram of the external structure of an exemplary electric drive bridge, consistent with other embodiments of this application, is shown.
[0035] Figure 5 A partial structural schematic diagram of an exemplary electric drive bridge consistent with some embodiments of this application is shown;
[0036] Figure 6 A partial structural schematic diagram of an exemplary electric drive bridge consistent with some embodiments of this application is shown;
[0037] Figure 7 A partial structural schematic diagram of an exemplary electric drive bridge consistent with some embodiments of this application is shown.
[0038] 1-First reducer; 2-Second reducer; 3-Third reducer; 4-Second half-shaft; 5-Motor; 6-Differential; 7-First half-shaft; 8-Axle housing; 9-Second extension housing; 10-First extension housing; 11-Brake. Detailed Implementation
[0039] The embodiments of this application will be described below. It should be noted that, in the detailed description of these embodiments, in order to maintain brevity, this specification cannot provide a detailed description of all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, changes may occur from one embodiment to another to achieve specific objectives. Furthermore, it is also understood that, although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content of this application, some design, manufacturing, or production modifications based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient content of this application.
[0040] like Figure 1 and Figure 3As shown, the electric drive bridge provided in this embodiment includes: a motor 5, including a stator and a rotor; a first reducer 1, disposed at one end of the motor 5, the input end of the first reducer 1 being coaxially connected to the rotor, and the output end of the first reducer 1 having an output shaft rotatably coaxially passing through the input end of the first reducer 1 and the rotor; the two ends of the output shaft of the first reducer 1 respectively form a first output end and a second output end, the first output end being located at the end of the first reducer 1 away from the motor 5, and the second output end being located at the end of the motor 5 away from the first reducer 1; a second reducer 2, the input end of the second reducer 2 being coaxially connected to the first output end, and the output end of the second reducer 2 being used for coaxially connected to the first wheel; and a third reducer 3, the input end of the third reducer 3 being coaxially connected to the second output end, and the output end of the third reducer 3 being used for coaxially connected to the second wheel; wherein, the first reducer 1 is a gear reducer; and the second reducer 2 and the third reducer 3 are both two-stage planetary reducers.
[0041] In the electric drive axle provided in this application embodiment, the rotor of motor 5 undergoes primary speed reduction and torque amplification via a gear reducer; then, after two more stages of speed reduction and torque amplification via a second reducer 2 through the first output end, it is coaxially connected to the first wheel; and after two more stages of speed reduction and torque amplification via a third reducer 3 through the second output end, it is coaxially connected to the second wheel.
[0042] The components of the electric drive axle are arranged coaxially, and the output of motor 5 is transmitted to the wheels after three-stage reduction and torque amplification. Therefore, a high-power-density, high-speed motor 5 can be used, reducing its size and improving the radial structural compactness of the electric drive axle, allowing for more flexible layout. Simultaneously, the three-stage reduction and torque amplification increases the speed ratio of the electric drive axle, covering a range of 50-400, achieving ultra-high torque output at the wheel ends.
[0043] Furthermore, the first reducer 1 is mainly used for speed reduction and adopts a gear reducer, which has a simple structure and can save costs. The second reducer 2 and the third reducer 3 both adopt two-stage planetary reducers, which have the advantages of large reduction ratio, large output torque, and strong load-bearing capacity, and can achieve a good torque increase effect. It can be seen that gear reducers and two-stage planetary reducers can achieve a good speed reduction and torque increase effect while reducing costs. Moreover, this application uses the first reducer 1 to perform primary speed reduction on the entire rotor of the motor 5. Compared with performing primary speed reduction on the two output ends of the rotor separately, it can reduce the number of reducer stages at the wheel ends, simplify the structure, reduce the axial space occupied, and also reduce costs.
[0044] It should be noted that both the input end and the rotor of the first reducer 1 are hollow shafts, through which the output shaft of the output end of the first reducer 1 passes.
[0045] Optionally, the two-stage planetary reducer includes a first-stage sun gear, a first-stage planetary gear, a first-stage planetary carrier, a first-stage fixed ring gear, a second-stage sun gear, a second-stage planetary carrier, a second-stage planetary gear, and a second-stage rotating ring gear; the first-stage fixed ring gear and the second-stage planetary carrier are fixed; the first-stage planetary carrier is fixedly connected to the second-stage sun gear. The first-stage sun gear, via an input gear fixed to the output shaft of the first reducer 1, drives the second-stage planetary reducer. The first-stage sun gear first drives the first-stage planetary gear to revolve and rotate around the first-stage fixed ring gear and the first-stage planetary carrier; then, the first-stage planetary carrier, as the first-stage output, drives the second-stage sun gear to rotate, which in turn drives the second-stage planetary gear to rotate around the second-stage planetary carrier, simultaneously driving the second-stage rotating ring gear to rotate. The second-stage rotating ring gear, as the second-stage output, transmits power to the wheels. The two ends of the first reducer 1 are directly coaxially connected to the second-stage planetary reducer, and the second-stage planetary reducer provides two-stage torque amplification and speed reduction to the output of the first reducer 1.
[0046] In some embodiments, a first half-shaft 7 is detachably connected between the input end of the second reducer 2 and the first output end; a second half-shaft 4 is detachably connected between the input end of the third reducer 3 and the second output end. The first output end can be connected to the second reducer 2 or connected to the second reducer 2 via the first half-shaft 7; the second output end can be connected to the third reducer 3 or connected to the third reducer 3 via the second half-shaft 4.
[0047] like Figure 1 As shown, in this embodiment, a first half-shaft 7 can be provided between the input end and the first output end of the second reducer 2; a second half-shaft 4 can be provided between the input end and the second output end of the third reducer 3, which can increase the axial distance between the second reducer 2 and the third reducer 3, thus making it suitable for engineering machinery such as electric vehicles with large tire distribution distances. Figure 3 As shown, this embodiment allows the input end of the second reducer 2 to be directly connected to the first output end; the input end of the third reducer 3 to be directly connected to the second output end, which shortens the axial distance between the second reducer 2 and the third reducer 3, making it suitable for construction machinery with small tire distribution distances, such as tire rollers and forklifts. It has strong expandability, allowing selection of half-shafts of different lengths or the option of not using half-shafts at all, to accommodate a wider range of tire distribution distances, improving the versatility of applications. It can be used in vehicle drive axles, single-wheel axles, etc.
[0048] In addition, in this embodiment, the two-stage planetary reducer is set on the output side of the half-shaft to avoid excessive torque transmitted by the half-shaft, which would affect its service life.
[0049] In some embodiments, the housing of the motor 5 and the housing of the first reducer 1 are integrated into a bridge housing 8. The two ends of the bridge housing 8 are respectively detachably connected to a first extension housing 10 and a second extension housing 9. The first half-shaft 7 is disposed in the first extension housing 10 and the second half-shaft 4 is disposed in the second extension housing 9. The first-stage fixed gear rings of the second reducer 2 and the third reducer 3 can be fixed to the two ends of the bridge housing 8 or to the first extension housing 10 and the second extension housing 9, respectively.
[0050] In this embodiment, the housing of the motor 5 and the housing of the first reducer 1 are integrated into a single housing, which also functions as the bridge housing 8, for supporting and mounting components. Integrating the housings of the fixed components simplifies the structure.
[0051] The bridge housing 8 is a sealed housing, which can be a symmetrical structure with two half-bridge housings. The two half-bridge housings are fixed together by bolts or other means to form the bridge housing 8, and the two half-bridge housings are sealed together. Specifically, sealing material is installed between the two half-bridge housings to make the bridge housing 8 form a sealed cavity. The rotor and stator of the motor 5 and the internal structure of the first reducer 1 are installed in this sealed cavity.
[0052] The rotor is coaxially mounted inside the stator. Both ends of the rotor are connected to the bridge housing 8 via bearings. The inner ring of the bearing is tightly fitted to the rotor, while the outer ring of the bearing is transitionally fitted to the bridge housing 8. The two ends of the first reducer 1 extend out of the bridge housing 8 and are coaxially connected to the second reducer 2 and the third reducer 3, respectively.
[0053] In a two-stage planetary reducer, the second-stage rotating gear ring serves as the outer casing, while the first-stage fixed gear ring is located inside the second-stage rotating gear ring. Depending on whether a half-shaft is connected, one end of the first-stage fixed gear ring is fixedly connected to the bridge housing 8 or the extension housing via a flange face. Figure 2 As shown, when connecting the half-shaft, one end of the primary fixed gear ring is fixedly connected to the extension shell via the flange face. Figure 4 As shown, when the half-shaft is not connected, one end of the primary fixed gear ring is fixedly connected to the axle housing 8 through the flange face.
[0054] In some embodiments, the output ends of both the second reducer 2 and the third reducer 3 are provided with a secondary rotating gear ring, and each secondary rotating gear ring is provided with a rim mounting surface. The secondary rotating gear ring serves as the output end of the secondary planetary reducer, and its outer wall has a first flange surface as the rim mounting surface. The rim is directly mounted to the rim mounting surface using bolts. This allows the wheel to be directly fitted onto the outside of the secondary rotating gear ring, bringing the wheel closer to both ends of the axle housing 8, shortening the tire spacing, simplifying the drive axle structure, and improving space utilization. This design is suitable for engineering machinery with small tire spacing, such as tire rollers.
[0055] In some embodiments, a differential 6 is detachably connected between the first output terminal and the input terminal of the second reducer 2. For example... Figures 5-6As shown, a differential 6 can be connected between the first output end and the input end of the second reducer 2. The output end of the first reducer 1 is connected to the housing of the differential 6. The differential 6 includes left and right output half-shafts forming the first half-shaft 7 and the second half-shaft 4, respectively. The left half-shaft coaxially passes through the input end of the first reducer 1 and the rotor of the motor 5, realizing left and right differential speed. This is better suited for applications with large tire distribution distances, such as electric vehicles. Figure 7 As shown, the first output end and the input end of the second reducer 2 can be directly connected, which can shorten the axial distance of the electric drive axle and is better suited for engineering machinery with small tire distribution distance, such as tire rollers and forklifts.
[0056] In some embodiments, the electric drive axle further includes a brake 11, the brake pads of which are disposed on at least one of the rotor, the output end of the first reducer 1, the output end of the second reducer 2, and the output end of the third reducer 3. For example, as... Figures 6-7 As shown, the brake pads of brake 11 are mounted on the rotor, resulting in a more timely braking response. The brake pads can be separate components mounted on the rotating parts, or they can be designed to be integrally formed with the rotating parts.
[0057] The secondary rotating gear ring, serving as the output end of the secondary planetary reducer, can have a second flange surface on its outer wall serving as the brake pads of the brake 11. Braking and parking are achieved by clamping the brake pads with brake calipers. During deceleration, firstly, the motor 5 generates braking torque during kinetic energy recovery; secondly, the vehicle's deceleration is controlled by controlling the braking force of the brake 11. This achieves a combination of braking and parking functions, and by controlling the kinetic energy recovery of the motor 5 and the braking force of the brake 11, the maximum braking torque of the vehicle can be significantly increased.
[0058] The brake 11 can be a brake device that combines braking and parking functions. The brake 11 can be pneumatic or hydraulic and can realize both braking and parking functions.
[0059] The brake 11 includes a brake 11 housing and brake pads, a brake caliper, and a brake drive component disposed within the brake 11 housing. A compression elastic component, consisting of several compression springs, is disposed between the inner wall of the brake 11 housing and one side of the brake caliper. The compression elastic component provides a certain amount of compression to deliver the required braking force. The axis of the compression elastic component is parallel to the axis of the rotor. Under the action of the compression elastic component, the other side of the brake caliper is pressed against the brake pads. Driven by the brake drive component, the brake caliper can overcome the restoring force of the compression elastic component and push the brake caliper away from the brake pads.
[0060] The braking actuator can be one of an electromagnetic force actuator, a hydraulic cylinder, or a pneumatic cylinder. In this embodiment, the braking actuator is a hydraulic cylinder. When the hydraulic cylinder extends, it reduces the pressure between the brake caliper and the brake pad, thus achieving service braking until the brake caliper and brake pad are completely separated, allowing the vehicle to drive normally without braking. During the braking process, the extension length of the hydraulic cylinder is controlled by controlling the pressure inside the hydraulic cylinder, thereby controlling the braking force of the brake 11. When the hydraulic cylinder pressure is zero, i.e., when the hydraulic cylinder does not extend, parking braking is achieved.
[0061] Therefore, it can be seen that the brake 11 only needs to control the extension length of the brake drive component to complete either service braking or parking braking. Moreover, the actuators for completing service braking and parking braking are exactly the same, with no other redundant structures. The design concept is ingenious, and the structure is compact and reasonable. Compared with the prior art, the brake 11 in this embodiment has a more optimized and compact structure, and a more reasonable design. It further reduces the overall size of the electric drive axle, making the electric drive axle of this embodiment very suitable for engineering machinery with small tire spacing, allowing for more flexible vehicle layout.
[0062] In other embodiments, the brake 11 may be a disc brake or a drum brake, and the reducer may be other types of reducers.
[0063] In some embodiments, a cooling channel is provided on the bridge housing 8 so that the coolant of the motor 5 can flow inside the bridge housing 8 to effectively cool the motor 5.
[0064] There is a cooling gap between the bridge housing 8 and the stator; the cooling gap is filled with coolant to improve the cooling effect of the motor 5.
[0065] The second-stage planetary carrier and the first-stage fixed gear ring of the second reducer 2 and the third reducer 3 are integrated into one unit, which can reduce the number of parts, simplify the structure, facilitate assembly, and save costs.
[0066] Furthermore, the electric drive axle can also achieve electromagnetic braking and recover kinetic energy by controlling the current direction of motor 5, thereby increasing the driving braking force of the electric drive axle. Through the control of kinetic energy recovery of motor 5 and braking force of brake 11, the maximum braking torque of the vehicle can be significantly improved. Under normal operating conditions, energy saving can be achieved through kinetic energy recovery of motor 5.
[0067] The electric drive axle is equipped with a hollow pipe that runs through the entire axle along the output shaft axis, which facilitates the centralized inflation pipeline layout of the tire machine.
[0068] This application also provides a tire roller, including a front wheel and a rear wheel, and an electric drive axle for driving the front wheel and / or the rear wheel. The electric drive axle is the electric drive axle provided in any of the above embodiments. This can improve the radial structural compactness of the electric drive axle, while also increasing the speed ratio of the electric drive axle, achieving ultra-high torque output at the wheel ends. These advantages are brought about by the electric drive axle; please refer to the relevant parts in the above embodiments for details, which will not be repeated here.
[0069] In some embodiments, the tire roller includes at least two front drive units, each front drive unit including two front wheels and a front electric drive axle driving the two front wheels; at least two front drive units are rotatably connected to a front bogie via a transition bracket; at least two rear drive units, each rear drive unit including two rear wheels and a rear electric drive axle driving the two rear wheels; at least two rear drive units are connected to a rear connecting frame, and follower wheels are provided between adjacent rear drive units.
[0070] The tire roller provided in this embodiment includes at least two front drive units and at least two rear drive units. Both front wheels on both sides and both rear wheels on both sides are driven by electric drive axles, so that both the front and rear wheels have driving capabilities, which can greatly improve the climbing ability of the tire roller and help reduce the fuel consumption of the tire roller.
[0071] The tire roller provided in this embodiment forms a tire machine with all-wheel drive capability. In other embodiments, to save costs, an electric drive axle can be installed only on the front or rear wheels, or part of the front or rear wheels, to achieve drive.
[0072] The working process of the tire roller provided in this embodiment is as follows:
[0073] When the electric drive axle generates driving force, the motor 5 is energized and rotates. Then, after primary reduction and torque increase through the first reducer 1, it undergoes secondary and tertiary reduction and torque increase through the second-stage planetary reducers on the left and right sides, driving the tires to rotate and thus generating driving force.
[0074] This application also provides a self-moving device, including wheels and a drive system for driving the wheels. The drive system is an electric drive axle provided in any of the above embodiments. This improves the radial structural compactness of the electric drive axle and increases its speed ratio, achieving ultra-high torque output at the wheel ends. These advantages are derived from the electric drive axle; please refer to the relevant parts in the above embodiments for details, which will not be repeated here. For example, the self-moving device can be an electric vehicle, a forklift, a tire roller, or other equipment that moves via wheels.
[0075] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details of the above application are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.
[0076] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Unless otherwise defined, the technical or scientific terms used in the claims and description should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar words used in the patent application description and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar words mean that the element or object preceding "comprising" or "including" encompasses the element or object listed following "comprising" or "including" and its equivalents, and do not exclude other elements or objects. The terms "connected," "coupled," or "linked" and similar words are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections. Words such as “including,” “contains,” and “has” are open-ended words that mean “including but not limited to” and can be used interchangeably with them.
[0077] In this application, the terms "or" and "and / or" describe the relationship between related objects and indicate a non-exclusive inclusion. For example, "A and / or B" and "A or B" can include: only "A" exists, only "B" exists, and both "A" and "B" exist simultaneously, where "A" and "B" can be singular or plural. As another example, "A, B, and / or C" and "A, B, or C" can include: only "A" exists, only "B" exists, only "C" exists, both "A" and "B" exist simultaneously, both "A" and "C" exist simultaneously, both "B" and "C" exist simultaneously, and both "A", "B", and "C" exist simultaneously, where "A", "B", and "C" can be singular or plural. Furthermore, the symbol " / " in this application indicates an "or" relationship between the related objects before and after the symbol. In this application, the term "at least one A or B" has the same meaning as the aforementioned "A or B". The term "at least one A, B or C" has the same meaning as "A, B or C" above.
[0078] In the apparatus and equipment of this application, the components can be disassembled and / or reassembled. These disassemblies and / or reassemblies should be considered as equivalent solutions of this application.
[0079] The above description of the claimed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be applied within the widest scope consistent with the principles and novel features of this application.
[0080] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms described herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.
Claims
1. An electric drive bridge, characterized in that, include: An electric motor consists of a stator and a rotor; A first reducer is disposed at one end of the motor. The input end of the first reducer is coaxially connected to the rotor. The output end of the first reducer is provided with an output shaft that can be rotatably coaxially passed through the input end of the first reducer and the rotor. The output shaft of the first reducer has a first output end and a second output end formed at its two ends, respectively. The first output end is located at the end of the first reducer away from the motor, and the second output end is located at the end of the motor away from the first reducer. The second reducer has its input end coaxially connected to the first output end, and its output end is used to be coaxially connected to the first wheel. The third reducer has its input end coaxially connected to the second output end, and its output end is used to be coaxially connected to the second wheel. The first reducer is a gear reducer; the second reducer and the third reducer are both two-stage planetary reducers.
2. The electric drive bridge according to claim 1, characterized in that, A first half-shaft is detachably connected between the input end of the second reducer and the first output end; The second half-shaft is detachably connected between the input end of the third reducer and the second output end.
3. The electric drive bridge according to claim 2, characterized in that, The housing of the motor and the housing of the first reducer are integrated into a bridge housing. The two ends of the bridge housing are respectively detachably connected to a first extension housing and a second extension housing. The first half-shaft is disposed in the first extension housing and the second half-shaft is disposed in the second extension housing. The first-stage fixed gear rings of the second reducer and the third reducer can be fixed to both ends of the axle housing or to the first extension housing and the second extension housing, respectively.
4. The electric drive bridge according to claim 3, characterized in that, Both the second reducer and the third reducer are provided with a two-stage rotating gear ring at their output ends, and each of the two-stage rotating gear rings is provided with a rim mounting surface.
5. The electric drive bridge according to claim 1, characterized in that, A differential is detachably connected between the first output terminal and the input terminal of the second reducer.
6. The electric drive bridge according to claim 1, characterized in that, It also includes a brake, wherein the brake pads of the brake are disposed on at least one of the rotor, the output end of the first reducer, the output end of the second reducer, and the output end of the third reducer.
7. The electric drive axle according to claim 3, characterized in that, The bridge housing is provided with cooling channels; And / or, a cooling gap exists between the bridge housing and the stator; And / or, the second-stage planetary carrier of the second reducer and the third reducer are integrated with the first-stage fixed gear ring.
8. A tire roller, characterized in that, It includes front wheels and rear wheels, and an electric drive axle that drives the front wheels and / or the rear wheels, the electric drive axle being the electric drive axle as described in any one of claims 1-7.
9. The tire roller according to claim 8, characterized in that, The tire roller includes at least two front drive units, each front drive unit including two front wheels and a front electric drive axle that drives the two front wheels; the at least two front drive units are rotatably connected to the front bogie via transition brackets. At least two rear drive units, each rear drive unit including two rear wheels and a rear electric drive axle for driving the two rear wheels; both rear drive units are connected to a rear connecting frame, and follower wheels are provided between adjacent rear drive units.
10. A self-moving device, characterized in that, It includes a walking wheel and a drive system for driving the walking wheel, wherein the drive system is an electric drive axle as described in any one of claims 1-7.