Synchronous motor hub reduction gear and electric drive mining dump truck
By employing multiple synchronous motors and planetary reduction gears in mining dump trucks, the problem of speed and torque matching under asynchronous motor drive is solved, achieving efficient power output and stable operation, thus improving the operating efficiency and safety of mining dump trucks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINGONG GROUP (JINAN) HEAVY MACHINERY CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-04-17
AI Technical Summary
Existing asynchronous motor-driven wheel-side reducers are difficult to accurately match the speed requirements of mining dump trucks under high-power output conditions, resulting in energy waste and insufficient power. In particular, they cannot provide continuous and stable high torque support when going downhill or uphill under heavy load, which affects operating efficiency and transportation capacity.
By replacing a single asynchronous motor with multiple synchronous motors and combining them with a planetary reduction gear assembly and a two-stage planetary reduction structure, the number of motors and the power reduction and torque increase can be flexibly adjusted to meet the heavy-load starting and climbing requirements of mining dump trucks, and to maintain stable vehicle operation in the event of motor failure.
It improves energy efficiency, significantly increases output torque, ensures vehicle power performance and stability under complex working conditions, reduces equipment downtime, and optimizes operating performance.
Smart Images
Figure CN224130883U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle transmission technology for dump trucks, and in particular to a synchronous motor wheel-side reducer and an electric drive mining dump truck. Background Technology
[0002] In the operation of heavy vehicles such as mining dump trucks, the wheel-side reducer, as a core component of the power transmission and braking system, plays a decisive role in the vehicle's power transmission efficiency, driving stability, and safety. Mining dump trucks often need to undertake heavy-load transportation tasks in mining environments with steep slopes and complex road conditions, with a single load capacity reaching hundreds of tons, and frequently undergoing acceleration, deceleration, and braking operations during operation. Under such high-intensity working conditions, the reliability and durability of the wheel-side reducer face enormous challenges.
[0003] Currently, most wheel-side reducers are powered by asynchronous motors. Industrial asynchronous motors have advantages such as robustness, durability, simple structure, low cost, and adaptability to harsh industrial environments. Their high reliability enables them to operate stably in harsh environments such as dust and vibration in mining areas. The structure of connecting the industrial asynchronous motor and the wheel in series realizes the direct transmission of power, eliminating many intermediate transmission components.
[0004] However, using an asynchronous motor as a power source is limited by its speed regulation characteristics and power output curve. Under high power output conditions, its speed is difficult to precisely match the actual needs of mining dump trucks. For example, when going downhill under heavy load, the asynchronous motor speed is too high, resulting in energy waste. During heavy-load climbing or starting, the speed cannot be adjusted in time, leading to insufficient power output or even motor overload. At the same time, the torque output of the asynchronous motor is limited. Faced with the complex working conditions of mining dump trucks, such as transporting hundreds of tons of materials at a time and frequently dealing with steep slopes and muddy roads, it is difficult to provide continuous and stable high torque support, resulting in slow vehicle start-up and difficulty climbing, which seriously restricts operating efficiency and transportation capacity. Utility Model Content
[0005] This invention addresses the problem that current asynchronous motor wheel-side reducers have limited output torque, making it difficult to provide continuous and stable high torque support. This can easily lead to slow vehicle start-up, difficulty climbing hills, and restrictions on work efficiency and transportation capacity. The invention proposes a synchronous motor wheel-side reducer and an electric mining dump truck.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] This utility model provides a synchronous motor wheel-side reducer, including a reducer body, which includes a hub mechanism, a braking module, and a power module. The hub mechanism includes a first output shaft and a reduction wheel hub component, with one end of the first output shaft being drivenly connected to the reduction wheel hub component. The braking module includes a brake, which is connected to the first output shaft. The power module includes multiple synchronous motors and a planetary motor reduction assembly. The planetary motor reduction assembly includes a first input end and a first output end, with the first input end being drivenly connected to the multiple synchronous motors and the first output end being drivenly connected to one end of the first output shaft. The planetary motor reduction assembly is used to reduce the power output by the multiple synchronous motors.
[0008] Furthermore, the motor planetary reduction assembly includes a first reduction gear, a first input end including multiple second reduction gears, and a first output end including a second output shaft. The number of second reduction gears is the same as the number of synchronous motors. The multiple second reduction gears are connected to the output ends of the multiple synchronous motors one by one. The second reduction gears mesh with the first reduction gears. The diameter of the first reduction gear is larger than the diameter of the second reduction gear. The first reduction gear is connected to one end of the second output shaft, and the other end of the second output shaft is connected to the first output shaft.
[0009] Furthermore, multiple second reduction gears are evenly distributed along the circumference of the first reduction gear.
[0010] Furthermore, the first output end includes a first sun gear, a first planet carrier, and a first planet gear. The first sun gear is connected to the first reduction gear, the first planet gear meshes with the first sun gear, the first planet gear is connected to the first planet carrier, and the first planet carrier is connected to one end of the second output shaft.
[0011] Furthermore, there are multiple first planetary gears, which are evenly distributed around the circumference of the first sun gear.
[0012] Furthermore, the motor planetary reduction assembly includes a first housing, the first housing having a first receiving space, the first receiving space being used to receive at least a first output end, a first input end and a first reduction gear, the first housing having a first internal tooth formed on the side wall of the first receiving space along the circumferential direction, the first planetary gear meshing with the first internal tooth.
[0013] Furthermore, the reduction hub component includes a hub body and a reduction module. The reduction module includes at least a first-stage reduction component and a second-stage reduction component. The first-stage reduction component includes a second planetary carrier, a second planetary gear, and a second sun gear. The second-stage reduction component includes a third planetary carrier, a third planetary gear, and a third sun gear. The third sun gear is drivenly connected to the first output shaft. The third planetary gear meshes with the third sun gear. The third planetary carrier is connected to the third planetary gear, and the third planetary carrier is drivenly connected to the second sun gear. The second planetary gear meshes with the second sun gear. The second planetary carrier is connected to the second planetary gear, and the second planetary carrier is fixedly connected to the hub body.
[0014] Furthermore, the deceleration module includes a second housing, one end of which is fixedly connected to the hub body, such that the second housing and the hub body form a second accommodating space capable of accommodating at least the first-stage deceleration component and the second-stage deceleration component. The second housing forms a second internal tooth along the circumferential direction on the inner wall of the second accommodating space, and the second planetary gear and the third planetary gear both mesh with the second internal tooth.
[0015] Furthermore, the brake is a wet braking structure.
[0016] This utility model also provides an electric drive mining dump truck, including a synchronous motor wheel-side reducer as described in any one of the above.
[0017] As can be seen from the above technical solutions, the advantages of this utility model are:
[0018] This invention replaces a single asynchronous motor with multiple synchronous motors, allowing for flexible adjustment of the number of motors in operation based on load requirements. This avoids the problem of power mismatch between the motor and the actual working conditions of the mining dump truck, improving energy efficiency. The planetary reduction gear assembly reduces the power output of the synchronous motors, increasing torque to better suit the needs of the mining dump truck and significantly increasing output torque, thus meeting the heavy-load starting and hill-climbing requirements. Furthermore, by using multiple synchronous motors instead of asynchronous motors, the remaining motors can continue to operate even if one motor fails, ensuring operational stability. Attached Figure Description
[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the transmission structure of the synchronous motor wheel-side reducer in Embodiment 1 of this utility model;
[0021] Figure 2This is a schematic diagram of the transmission structure of the synchronous motor wheel-side reducer in Embodiment 2 of this utility model.
[0022] Explanation of key figure labels:
[0023] 10. Reducer body; 100. Hub mechanism; 110. Reducer hub component; 111. Hub body; 120. First output shaft; 200. Braking module; 210. Brake; 300. Power module; 310. Synchronous motor; 320. Motor planetary reduction assembly; 321. First input end; 322. First output end; 3221. First sun gear; 3222. First planet gear; 3223. First planet carrier; 323. First reduction gear; 324. Second reduction gear; 330. Second output shaft; 340, first housing; 341, first receiving space; 342, first internal gear; 400, reduction module; 410, second input end; 420, second output end; 430, first stage reduction component; 431, second sun gear; 432, second planet gear; 433, second planet carrier; 440, second stage reduction component; 441, third sun gear; 442, third planet gear; 443, third planet carrier; 450, second housing; 451, second receiving space; 452, second internal gear. Detailed Implementation
[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0025] Example 1
[0026] Please see Figure 1A synchronous motor wheel-side reducer includes a reducer body 10, which includes a hub mechanism 100, a braking module 200, and a power module 300. The hub mechanism 100 includes a first output shaft 120 and a reduction hub component 110, with one end of the first output shaft 120 being drive-connected to the reduction hub component 110. The braking module 200 includes a brake 210, which is connected to the first output shaft 120. The power module 300 includes multiple synchronous motors 310 and a motor planetary reduction assembly 320, which includes a first input end 321 and a first output end 322. The first input end 321 is drive-connected to the multiple synchronous motors 310, and the first output end 322 is drive-connected to one end of the first output shaft 120. The motor planetary reduction assembly 320 is used to reduce the power output by the multiple synchronous motors 310.
[0027] In this embodiment, as Figure 1 As shown, the hub mechanism 100 includes a reduction hub component 110 and a first output shaft 120. One end of the first output shaft 120 is connected to the reduction hub component 110. The power module 300 includes multiple synchronous motors 310. The output ends of the multiple synchronous motors 310 are all connected to the first input end 321 of the motor planetary reduction assembly 320. The first output end 322 of the motor planetary reduction assembly 320 is connected to the first output shaft 120 relative to one end of the reduction hub component 110, so that the synchronous motors can drive the output of power to the first output shaft 120. When the synchronous motors 310 transmit power to the motor planetary reduction assembly 320 through the first input end 321, the motor planetary reduction assembly 320 reduces the power and increases the torque, and then transmits the power to the first output shaft 120 through the first output end 322. In the braking module 200, the brake 210 is connected to the first output shaft 120. During braking, the brake 210 and the first output shaft 120 brake the first output shaft 120 through friction.
[0028] During power transmission, the power output from multiple synchronous motors 310 is transmitted through the first input terminal 321 to the planetary reduction gear assembly 320 for initial deceleration. The initially decelerated power is then transmitted through the first output terminal 322 to the first output shaft 120, which in turn transmits the power to the reduction wheel hub, thereby driving the wheel to rotate. When braking is required, the brake 210 generates a frictional torque to prevent the first output shaft 120 from rotating, thus achieving the braking function.
[0029] In the above structure, multiple synchronous motors 310 replace a single asynchronous motor. This allows for flexible adjustment of the number of motors in operation based on load requirements, avoiding the mismatch between power and the actual working conditions of the mining dump truck, and improving energy efficiency. Furthermore, the planetary reduction gear assembly 320 reduces the power output of the synchronous motors 310, increasing torque to better suit the needs of the mining dump truck, significantly increasing output torque, and meeting the heavy-load starting and hill-climbing requirements. Additionally, using multiple synchronous motors 310 to replace the asynchronous motor ensures that if one motor fails, the remaining motors can still maintain vehicle operation, guaranteeing operational stability.
[0030] In the specific structure of the motor planetary reduction assembly 320, the motor planetary reduction assembly 320 includes a first reduction gear 323, a first input end 321 including multiple second reduction gears 324, and a first output end 322 including a second output shaft 330. The number of second reduction gears 324 is the same as the number of synchronous motors 310. The multiple second reduction gears 324 are connected to the output ends of the multiple synchronous motors 310 one by one. The second reduction gears 324 mesh with the first reduction gears 323. The diameter of the first reduction gear 323 is larger than the diameter of the second reduction gear 324. The first reduction gear 323 is connected to one end of the second output shaft 330, and the other end of the second output shaft 330 is connected to the first output shaft 120. The multiple second reduction gears 324 are evenly distributed along the circumference of the first reduction gear 323.
[0031] In this embodiment, as Figure 1 As shown, multiple synchronous motors 310 can be arranged in an array and installed at specific positions on the synchronous motor wheel-side reducer to provide a power source for the entire system. The first reduction gear 323 is a large-diameter gear with a central shaft hole, and is connected to one end of the second output shaft 330 via a key connection, interference fit, or other means. The number of second reduction gears 324 is the same as the number of synchronous motors 310. Each second reduction gear 324 has a smaller diameter than the first reduction gear 323 and also has a central shaft hole. It is connected to the output end of the corresponding synchronous motor 310 via a coupling, spline, or other transmission structure. Multiple second reduction gears 324 are evenly distributed circumferentially along the first reduction gear 323 and mesh with it. The second output shaft 330 is coaxially arranged with the first output shaft 120, and the end of the second output shaft 330 relative to the first output end 322 is connected to the end of the first output shaft 120 away from the reduction hub 110, allowing the synchronous motor 310 to drive the first output shaft 120 to rotate, thereby transmitting power to the first output shaft 120.
[0032] Multiple synchronous motors 310 start synchronously, outputting the same speed and torque. The output end of the synchronous motor 310 is connected to the second reduction gear 324 and transmits power to the second reduction gear 324. Multiple second reduction gears 324 simultaneously drive the first reduction gear 323 to rotate. Since the diameter of the first reduction gear 323 is larger than that of the second reduction gear 324, the first reduction gear 323 transmits the reduced power to the second output shaft 330.
[0033] In the above structure, the power of the synchronous motor 310 is further reduced through the meshing transmission of multiple second reduction gears 324 and the first reduction gear 323, thereby amplifying the torque and enabling the synchronous motor wheel-side reducer to efficiently drive the vehicle, improving the vehicle's power performance and working efficiency. Furthermore, when one or more synchronous motors 310 fail, the other normally operating synchronous motors 310 can still ensure the basic operation of the synchronous motor wheel-side reducer, maintaining the vehicle's minimum working capacity and preventing complete vehicle failure due to a single motor malfunction. This improves the reliability of the synchronous motor wheel-side reducer and the safety of vehicle operation, reducing downtime and maintenance costs caused by equipment failure. Depending on actual operating conditions, some synchronous motors 310 can be selectively activated or deactivated to achieve flexible adjustment of power output. For example, when the vehicle is unloaded or lightly loaded, the number of synchronous motors 310212 operating is reduced to lower energy consumption and improve fuel economy; when heavily loaded or climbing, all synchronous motors 310212 are activated to output maximum power. This flexible power adjustment method enables the synchronous motor wheel-side reducer to better adapt to different working scenarios and optimize vehicle operating performance.
[0034] In the specific structure of the reduction hub component 110, the reduction hub component 110 includes a hub body 111 and a reduction module 400. The reduction module 400 includes at least a first-stage reduction component 430 and a second-stage reduction component 440. The first-stage reduction component 430 includes a second planetary carrier 433, a second planetary gear 432, and a second sun gear 431. The second-stage reduction component 440 includes a third planetary carrier 443, a third planetary gear 442, and a third sun gear 441. The third sun gear 441 is drivenly connected to the first output shaft 120. The third planetary gear 442 meshes with the third sun gear 441. The third planetary carrier 443 is connected to the third planetary gear 442 and is drivenly connected to the second sun gear 431. The second planetary gear 432 meshes with the second sun gear 431. The second planetary carrier 433 is connected to the second planetary gear 432. The second planetary carrier 433 is fixedly connected to the hub body 111.
[0035] In this embodiment, as Figure 1As shown, the first output shaft 120 is movably connected to the hub body 111. This movable connection is a conventional connection structure. Specifically, the hub body 111 has an axially extending through hole in the middle, through which the first output shaft 120 passes. A bearing is also installed inside the through hole, and the first output shaft 120 cooperates with the bearing to allow the first output shaft 120 to rotate flexibly relative to the hub body 111, providing basic support for power transmission and vehicle movement. The reduction module 400 adopts a two-stage planetary reduction structure design, composed of a first-stage reduction component 430 and a second-stage reduction component 440. The third sun gear 441 in the second-stage reduction component 440 is fixedly connected to the first output shaft 120 via a spline connection, coupling drive, or other reliable means. In addition, multiple third planetary gears 442 are usually provided, such as 3-4, evenly distributed along the circumference of the third sun gear 441. Multiple third planetary gears 442 mesh with the third sun gear 441 and are simultaneously mounted on the pins of the third planetary carrier 443 via bearings. They can rotate on their own axes and revolve around the third sun gear 441. The third planetary carrier 443 provides support and a transmission carrier for the third planetary gears 442, and has a corresponding number of pins for mounting them. One end of the third planetary carrier 443 has a shaft that is rigidly connected to the second sun gear 431 in the first-stage reduction gear 430 via splines, keyways, or other means, transmitting the motion of the third planetary gears 442 to the second sun gear 431. The second sun gear 431 receives the power transmitted by the second-stage reduction gear 440. Multiple second planetary gears 432 are also provided, evenly distributed along the circumference of the second sun gear 431, and mesh with the second sun gear 431. The second planetary gears 432 are mounted on the shaft pins of the second planetary carrier 433 through bearings, and can perform rotation and revolution. One end of the second planetary carrier 433 is fixedly connected to the hub body 111, thereby transmitting the reduced power to the hub body 111 to drive the hub body 111 to rotate.
[0036] When the synchronous motor wheel-side reducer is working, power is input from the first output shaft 120 to the third sun gear 441 connected thereto. The third sun gear 441 acts as the driving gear, driving the multiple third planet gears 442 meshed with it to rotate. Under the drive of the third sun gear 441, the third planet gears 442 rotate around their own axis on the one hand, and revolve around the third sun gear 441 on the other hand. The revolving motion of the multiple third planet gears 442 together acts on the third planet carrier 443, causing the third planet carrier 443 to rotate. The third planet carrier 443 transmits the reduced and increased torque power to the second sun gear 431, completing the first reduction process. Subsequently, the second sun gear 431 receives power from the third planetary carrier 443 and begins to rotate, thereby driving the second planetary gear 432 meshing with it. Under the action of the second sun gear 431, the second planetary gear 432 also performs rotation and revolution. The revolution of multiple second planetary gears 432 drives the second planetary carrier 433 to rotate. The second planetary carrier 433 is fixedly connected to the hub body 111, and finally transmits the power after two stages of reduction and torque amplification to the hub body 111 to meet the power requirements of vehicle driving.
[0037] In the above structure, such as Figure 1 As shown, a two-stage planetary reduction structure is adopted, which can achieve a larger transmission ratio. Through the sequential action of the two-stage reduction components, the high-speed rotational power input from the motor can be significantly reduced in speed and increased in torque, providing powerful driving force for heavy vehicles such as mining dump trucks. This meets the stringent requirements of vehicles for high torque output under heavy load climbing and complex road conditions, significantly improving the vehicle's power performance and passability. The two-stage planetary reduction structure can flexibly change the transmission ratio by adjusting the gear ratio of the sun gear and planet gears in each stage of the reduction component, so as to adapt to the vehicle's power requirements under different working conditions and improve the vehicle's overall performance and applicability.
[0038] In addition, the reduction module 400 includes a second housing 450, one end of which is fixedly connected to the hub body 111, such that the second housing 450 and the hub body 111 form a second receiving space 451 that can accommodate at least the first-stage reduction component 430 and the second-stage reduction component 440. The second housing 450 forms a second internal tooth 452 along the circumferential direction on the inner wall of the second receiving space 451, and the second planetary gear 432 and the third planetary gear 442 both mesh with the second internal tooth 452.
[0039] In this embodiment, the second housing 450 is generally cylindrical with a hollow interior. One end face of the second housing 450 has an opening that communicates with the hollow interior. During installation, the end with the opening is fixedly connected to the end face of the hub body 111 with bolts, so that the hub body 111 closes the opening. The second housing 450 and the hub body 111 form a second receiving space 451. The first-stage reduction component 430 and the second-stage reduction component 440 are installed in the second receiving space 451. A second internal tooth 452 is provided on the inner wall of the second housing 450 forming the second receiving space 451. The second internal tooth 452 extends circumferentially along the inner wall of the second housing 450. The second planetary gear 432 and the third planetary gear 442 both mesh with the second internal tooth 452.
[0040] The compact design saves space and adapts better to layout requirements. The two-stage planetary gear reduction is integrated into the same housing, providing a relatively independent working environment for the first-stage reducer 430 and the second-stage reducer 440. This facilitates good lubrication and sealing, while the enclosed structure also helps prevent external impurities from entering, improving the operational stability and reliability of the components.
[0041] More specifically, brake 210 is a wet braking structure.
[0042] In this embodiment, the brake 210 is a multi-disc wet brake 210, including a brake cylinder, a piston, a friction pad assembly, and a spring assembly. The brake cylinder is fixed to the inner end face of the wheel hub body 111 by bolts. The piston can slide axially within the brake cylinder. The friction pad assembly consists of alternating moving friction pads and stationary friction pads. The moving friction pads are connected to the first output shaft 120 via internal splines, and the stationary friction pads are connected to the brake cylinder via external splines.
[0043] Example 2
[0044] Please see Figure 2 A synchronous motor wheel-side reducer is disclosed in Embodiment 2. While the other structures are identical to those in Embodiment 1, the following differences exist: the first output end 322 includes a first sun gear 3221, a first planetary carrier 3223, and first planetary gears 3222. The first sun gear 3221 is connected to the first reduction gear 323. The first planetary gears 3222 mesh with the first sun gear 3221 and are connected to the first planetary carrier 3223. The first planetary carrier 3223 is connected to one end of the second output shaft 330. Multiple first planetary gears 3222 are provided, and these gears are evenly distributed circumferentially along the first sun gear 3221.
[0045] In this embodiment, as Figure 2As shown, the first output terminal 322 is a single-stage planetary reduction structure. The first sun gear 3221 is connected to the first reduction gear 323 via a shaft. One end of the shaft is splined to the first reduction gear 323, and the other end is splined to the first sun gear 3221. The first reduction gear 323 transmits power to the first sun gear 3221 and ensures that the first sun gear 3221 rotates synchronously with the first reduction gear 323, thus introducing power into the first output terminal 322. Furthermore, multiple first planetary gears 3222 are typically provided, usually three. One or four first planetary gears 3222 are evenly distributed around the circumference of the first sun gear 3221. Each first planetary gear 3222 has a number of teeth and tooth profile that match the first sun gear 3221, so that it can mesh with the first sun gear 3221. The first planetary gears 3222 are connected and mounted on the first planetary carrier 3223, so that the first planetary gears 3222 can drive the first planetary carrier 3223 to rotate synchronously. One end of the first planetary carrier 3223 is connected to one end of the second output shaft 330, ensuring that the first planetary carrier 3223 can transmit the motion of the first planetary gears 3222 to the second output shaft 330, and then to the first output shaft 120.
[0046] When the first reduction gear 323 rotates, it drives the first sun gear 3221, which is connected to it, to rotate together. The first sun gear 3221, as the driving gear, drives the multiple first planet gears 3222 meshing with it to rotate. Since the first planet gears 3222 are evenly distributed around the first sun gear 3221, they also revolve around the first sun gear 3221 while rotating on their own axis. The revolve motion of the first planet gears 3222 drives the first planet carrier 3223 to rotate together. Since the first planet carrier 3223 is connected to the second output shaft 330, the rotation of the first planet carrier 3223 is directly transmitted to the second output shaft 330, thereby realizing the conversion of the high-speed rotation of the synchronous motor 310 into the low-speed rotation of the hub body 111, achieving the purpose of speed reduction and torque increase. The first planetary gear 3222 achieves power transmission and speed reduction / torque increase through meshing with the first sun gear 3221 and its own planetary motion. The even distribution of multiple first planetary gears 3222 makes the entire transmission process smoother and the force more even, reducing the load on a single planetary gear and improving the reliability and service life of the planetary reduction assembly.
[0047] In the above structure, by setting a planetary reduction structure at the first output end 322, a highly efficient speed reduction and torque increase effect is further achieved. The planetary reduction structure has a high transmission ratio, which can convert the input high speed low torque into the output low speed high torque, thus meeting the power requirements of the vehicle under different operating conditions.
[0048] Specifically, the motor planetary reduction assembly 320 includes a first housing 340, the first housing 340 is provided with a first receiving space 341, the first receiving space 341 is used to accommodate at least a first output end 322, a first input end 321 and a first reduction gear 323, the first housing 340 is formed with a first internal tooth 342 along the circumferential direction on the side wall of the first receiving space 341, and the first planetary gear 3222 meshes with the first internal tooth 342.
[0049] In this embodiment, as Figure 2 As shown, the first housing 340 has an overall cylindrical structure with a hollow interior to form a first receiving space 341. The first output end 322, the first input end 321, and the first reduction gear 323 are all installed in the first receiving space 341. A first internal tooth 342 is provided on the inner wall of the first housing 340 forming the first receiving space 341. The first internal tooth 342 extends circumferentially along the inner wall of the first housing 340. The first planetary gear 3222 meshes with the first internal tooth 342.
[0050] This compact design effectively saves space and better adapts to layout requirements. It provides a relatively independent working environment for the first input terminal 321, the first output terminal 322, and the first reduction gear 323, which facilitates good lubrication and sealing. The enclosed structure also helps prevent external impurities from entering, improving the operational stability and reliability of the components. Furthermore, multiple second reduction gears 324 and part of the output terminal of the synchronous motor 310, which is connected to the second reduction gears 324, are also housed within the first receiving space 341, further protecting transmission stability.
[0051] Example 3
[0052] This utility model also provides an electric drive mining dump truck, including a synchronous motor wheel-side reducer as described in any one of the above.
[0053] In this embodiment, the body frame of the electric drive mining dump truck is a rigid frame structure welded from high-strength low-alloy steel, capable of withstanding the enormous stress during heavy-duty transportation. Multiple mounting brackets are installed on the body frame for securing key components such as the power system and suspension system. All four wheels are equipped with the synchronous motor wheel-side reducer. Each synchronous motor wheel-side reducer includes a braking module 200, a power module 300, and a reduction module 400. The wheels are fixedly connected to the wheel hub body 111 of the synchronous motor wheel-side reducer using high-strength bolts, ensuring stable power transmission to the wheels.
[0054] Multiple synchronous motors 310 work together, combined with the multi-stage reduction of the motor planetary reduction assembly 320 and the reduction module 400, which can output ultra-high torque, enabling the vehicle to still have strong power under complex working conditions such as heavy-load climbing and driving on soft roads, effectively improving the vehicle's operating efficiency and passability.
[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A wheel rim reduction gear for a synchronous electric machine comprising a reduction gear body (10), characterized in that, The reducer body (10) includes: A hub mechanism (100) includes a first output shaft (120) and a reduction hub component (110), one end of the first output shaft (120) being connected to the reduction hub component (110) in a transmission manner; A braking module (200) includes a brake (210) which is connected to the first output shaft (120). The power module (300) includes multiple synchronous motors (310) and a planetary motor reduction assembly (320). The planetary motor reduction assembly (320) includes a first input terminal (321) and a first output terminal (322). The first input terminal (321) is connected to the multiple synchronous motors (310) in a transmission connection, and the first output terminal (322) is connected to one end of the first output shaft (120) in a transmission connection. The planetary motor reduction assembly (320) is used at least to reduce the power output by the multiple synchronous motors (310).
2. The wheel-side reducer of the synchronous motor according to claim 1, characterized in that, The planetary reduction gear assembly (320) includes a first reduction gear (323), the first input end (321) includes a plurality of second reduction gears (324), the first output end (322) includes a second output shaft (330), the number of the second reduction gears (324) is the same as the number of the synchronous motors (310), the plurality of second reduction gears (324) are connected to the output ends of the plurality of synchronous motors (310) one by one, the second reduction gears (324) mesh with the first reduction gears (323), the diameter of the first reduction gears (323) is larger than the diameter of the second reduction gears (324), the first reduction gears (323) are connected to one end of the second output shaft (330), and the other end of the second output shaft (330) is connected to the first output shaft (120).
3. The wheel-side reducer of the synchronous motor according to claim 2, characterized in that, Multiple second reduction gears (324) are evenly distributed along the circumference of the first reduction gear (323).
4. The wheel-side reducer of the synchronous motor according to claim 2, characterized in that, The first output end (322) includes a first sun gear (3221), a first planet carrier (3223) and a first planet gear (3222). The first sun gear (3221) is connected to the first reduction gear (323) for transmission. The first planet gear (3222) meshes with the first sun gear (3221). The first planet gear (3222) is connected to the first planet carrier (3223). The first planet carrier (3223) is connected to one end of the second output shaft (330) for transmission.
5. The wheel-side reducer of the synchronous motor according to claim 4, characterized in that, The first planetary gear (3222) is provided in multiple ways, and the multiple first planetary gears (3222) are evenly distributed along the circumference of the first sun gear (3221).
6. The synchronous motor wheel-side reducer according to claim 4, characterized in that, The motor planetary reduction assembly (320) includes a first housing (340), the first housing (340) having a first receiving space (341), the first receiving space (341) being used to at least receive the first output end (322), the first input end (321) and the first reduction gear (323), the first housing (340) having a first internal tooth (342) formed circumferentially on the side wall of the first receiving space (341), the first planetary gear (3222) meshing with the first internal tooth (342).
7. The wheel-side reducer of the synchronous motor according to claim 1, characterized in that, The reduction hub component (110) includes a hub body (111) and a reduction module (400). The reduction module (400) includes at least a first-stage reduction component (430) and a second-stage reduction component (440). The first-stage reduction component (430) includes a second planetary carrier (433), a second planetary gear (432), and a second sun gear (431). The second-stage reduction component (440) includes a third planetary carrier (443), a third planetary gear (442), and a third sun gear (441). The third sun gear (441) is connected to the first... The output shaft (120) is driven to connect the third planetary gear (442) to the third sun gear (441), the third planetary carrier (443) is connected to the third planetary gear (442), and the third planetary carrier (443) is driven to connect the second sun gear (431). The second planetary gear (432) is meshed with the second sun gear (431), the second planetary carrier (433) is connected to the second planetary gear (432), and the second planetary carrier (433) is fixedly connected to the hub body (111).
8. The wheel-side reducer of the synchronous motor according to claim 7, characterized in that, The deceleration module (400) includes a second housing (450), one end of which is fixedly connected to the hub body (111) so that the second housing (450) and the hub body (111) form a second accommodating space (451) capable of accommodating at least the first stage deceleration component (430) and the second stage deceleration component. The second housing (450) has a second internal tooth (452) formed on the inner wall of the second accommodating space (451) along the circumferential direction. The second planetary gear (432) and the third planetary gear (442) are both meshed with the second internal tooth (452).
9. The wheel-side reducer of the synchronous motor according to claim 1, characterized in that, The brake (210) is a wet braking structure.
10. An electrically driven mining dump truck, characterized in that Includes a synchronous motor wheel-side reducer as described in any one of claims 1-9.