Four-intermediate-shaft power assembly for pure electric mine truck

Abstract

The utility model discloses a four-intermediate-shaft power assembly for a pure electric mine truck. The four-intermediate-shaft power assembly comprises two high-speed small-torque permanent magnet motors and two high-speed asynchronous motors. The two permanent magnet motors transmit the torque and the rotating speed to the input shaft through the first-stage speed reduction gear I; the input shaft transmits power to the intermediate shaft I and the intermediate shaft II through the intermediate shaft long meshing gear; the intermediate shaft I and the intermediate shaft II transmit power to the output shaft through a first-gear gear, a second-gear gear, a third-gear gear and a fourth-gear gear according to different vehicle speeds through a 1 / 2-gear sliding sleeve or a 3 / 4-gear sliding sleeve; the asynchronous motor transmits the torque and the rotating speed to an intermediate shaft III / an intermediate shaft IV through a first-stage speed reduction gear II / a first-stage speed reduction gear III; and the intermediate shaft III / intermediate shaft IV transmits the power to the output shaft through the second-stage speed reduction gear II and the second-stage speed reduction gear I. The utility model can realize uninterrupted power output and power output in different gear modes, and can solve the problems of high cost and the like of a high-power power assembly.

Description

Technical Field

[0001] This utility model belongs to the field of electric mining truck power technology, and relates to a four intermediate shaft power assembly for pure electric mining trucks. Background Technology

[0002] Currently, most pure electric mining trucks use a power structure that replaces the engine with an electric motor in a traditional fuel-powered vehicle, and employs a mechanical manual transmission (AMT) with a limited number of gears. However, with only one motor as the power source, power interruption occurs when shifting gears. This configuration is suitable for operating scenarios with gentle slopes and good road conditions. But for operating conditions where the reliability and comfort of AMT shifting are more critical, it is necessary to develop a power structure and shifting method that allows for uninterrupted power shifting. Furthermore, existing motors all use low-speed, high-torque single motors or dual motors in series, resulting in high motor costs and limited power, which cannot meet the high-power requirements of mining trucks. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a four-intermediate-shaft powertrain for pure electric mining trucks, solving problems such as power interruption during AMT shifting, stopping after AMT fails to shift gears on slopes, and shifting smoothness. This invention employs two high-speed permanent magnet motors, two high-speed asynchronous motors, and the combined power of the four motors to solve the problem of slow vehicle speed caused by insufficient power in mining trucks, thereby improving vehicle operating efficiency. The use of four high-speed motors results in low cost, solving the problem of high cost for high-power powertrains.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A four-intermediate-shaft powertrain for a pure electric mining truck includes two high-speed, low-torque permanent magnet motors and two high-speed asynchronous motors.

[0006] Two permanent magnet motors are respectively connected to a gear and mesh with a first-stage reduction gear I. The first-stage reduction gear I is fixed to the input shaft. The input shaft and the output shaft are coaxial and opposite to each other. The two sides of the input shaft and the output shaft are intermediate shaft I and intermediate shaft II, respectively. The input shaft is splined to the intermediate shaft long meshing gear and meshes with the fourth gear on intermediate shaft I and intermediate shaft II, respectively. The output shaft is sequentially fitted with a 3 / 4 gear sliding sleeve, splined to the output shaft third gear and meshing with the third gear on intermediate shaft I and intermediate shaft II, splined to the output shaft second gear and meshing with the second gear on intermediate shaft I and intermediate shaft II, fitted with a 1 / 2 gear sliding sleeve, splined to the output shaft first gear and meshing with the first gear on intermediate shaft I and intermediate shaft II, and fixed to the second-stage reduction gear I and the gearbox output flange.

[0007] Two asynchronous motors are respectively connected to the first-stage reduction gear II and the first-stage reduction gear III through the connected gears. The first-stage reduction gear II and the first-stage reduction gear III are fixedly connected to the intermediate shaft III and the intermediate shaft IV, respectively. The second-stage reduction gear II is fixedly connected to the intermediate shaft III and the intermediate shaft IV, and the two second-stage reduction gears II are engaged with the second-stage reduction gear I.

[0008] This utility model also includes the following technical features:

[0009] Specifically, the two permanent magnet motors transmit torque and speed to the input shaft through a first-stage reduction gear I; the input shaft transmits power to intermediate shaft I and intermediate shaft II through a long meshing gear on the intermediate shaft; intermediate shaft I and intermediate shaft II transmit power to the output shaft through a 1 / 2 gear sliding sleeve or a 3 / 4 gear sliding sleeve, depending on the vehicle speed, via a first gear / second gear / third gear / fourth gear.

[0010] Specifically, one asynchronous motor transmits torque and speed to intermediate shaft III through primary reduction gear II; intermediate shaft III transmits power to output shaft through secondary reduction gear II and secondary reduction gear I; another high-speed asynchronous motor transmits torque and speed to intermediate shaft IV through primary reduction gear III; intermediate shaft IV transmits power to output shaft through secondary reduction gear II and secondary reduction gear I.

[0011] Specifically, the two permanent magnet motors and the two asynchronous motors are located at the four corners of the transmission.

[0012] Specifically, intermediate shaft I, intermediate shaft II, intermediate shaft III and intermediate shaft IV are located at the four corners of the transmission.

[0013] Specifically, the 1 / 2 gear sliding sleeve can transmit torque and speed to the output shaft through the first or second gear by pushing it to the right or left; the 3 / 4 gear sliding sleeve can transmit torque and speed to the output shaft through the third or fourth gear by pushing it to the right or left; different gear modes can be switched through the 1 / 2 gear sliding sleeve, the 3 / 4 gear sliding sleeve and the motor control mode.

[0014] Specifically, the two permanent magnet motors achieve speed reduction and torque increase through a reducer and a four-speed gearbox; the two asynchronous motors are directly connected to the output shaft through two-stage reduction, and the two asynchronous motors continue to output torque during the gear shifting process, so as to achieve uninterrupted power output.

[0015] Compared with the prior art, this utility model has the following technical effects:

[0016] In this invention, when permanent magnet motor I and permanent magnet motor II shift gears, asynchronous motors III and IV transmit torque and speed to the output shaft through a first-stage reduction gear, an intermediate shaft, and a second-stage reduction gear, ensuring power output during gear shifting. During low-speed drive, permanent magnet motors I and II achieve high torque output through gear shifting, ensuring climbing torque. During medium-speed drive, the four motors work together to achieve high power output. During high-speed drive, the output of asynchronous motors III and IV can be blocked to ensure the output efficiency of the power system. Using four high-speed motors reduces cost and solves the problem of high cost for high-power, low-speed motors. The use of four intermediate shafts improves overall reliability. Attached Figure Description

[0017] Figure 1 A schematic diagram of the four intermediate shaft powertrain structure for pure electric mining trucks.

[0018] Figure 2 This is a spatial distribution diagram of the motors.

[0019] Figure 3 This is a spatial distribution diagram of the intermediate shaft and the output shaft.

[0020] Figure 4 This is a schematic diagram of the power transmission route in gear mode one.

[0021] Figure 5 This is a schematic diagram of the power transmission route in gear mode two.

[0022] Figure 6 This is a schematic diagram of the power transmission route in gear mode three.

[0023] Figure 7 This is a schematic diagram of the power transmission route in gear mode four.

[0024] Figure 8 This is a schematic diagram of the power transmission route in gear mode five.

[0025] The meanings of the labels in the diagram are as follows:

[0026] 1. First-stage reduction gear I; 2. Input shaft; 3. Intermediate shaft long meshing gear; 4. Fourth gear; 5. Intermediate shaft I; 6. 3 / 4 gear sliding sleeve; 7. Third gear; 8. Second gear; 9. 1 / 2 gear sliding sleeve; 10. First gear; 11. Intermediate shaft II; 12. Output shaft; 13. Gearbox output flange; 14. First-stage reduction gear II; 15. Intermediate shaft III; 16. Second-stage reduction gear I; 17. Permanent magnet motor I; 18. Permanent magnet motor II; 19. Asynchronous motor III; 20. Asynchronous motor IV; 21. First-stage reduction gear III; 22. Intermediate shaft IV; 23. Second-stage reduction gear II; 24. Output shaft first gear; 25. Output shaft second gear; 26. Output shaft third gear. Detailed Implementation

[0027] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0028] Example 1:

[0029] This embodiment provides a four-intermediate-shaft powertrain for a pure electric mining truck, such as... Figures 1 to 3 As shown, it includes two high-speed, low-torque permanent magnet motors and two high-speed asynchronous motors.

[0030] The output shafts of the two permanent magnet motors are respectively connected to gears via splines, and both gears mesh with the first-stage reduction gear I1. The first-stage reduction gear I1 is fixedly connected to the input shaft 2. The input shaft 2 and the output shaft 12 are coaxially opposite each other. The two sides of the input shaft 2 and the output shaft 12 are the intermediate shaft I5 and the intermediate shaft II11, respectively. The input shaft 2 is splined to the intermediate shaft long meshing gear 3, which meshes with the fourth gear 4 on the intermediate shaft I5 and the intermediate shaft II11, respectively. The output shaft 12 is sequentially fitted with a 3 / 4 gear sleeve 6, a splined to the output shaft third gear 26 which meshes with the third gear 7 on the intermediate shaft I5 and the intermediate shaft II11, a splined to the output shaft second gear 25 which meshes with the second gear 8 on the intermediate shaft I5 and the intermediate shaft II11, a 1 / 2 gear sleeve 9, a splined to the output shaft first gear 24 which meshes with the first gear 10 on the intermediate shaft I5 and the intermediate shaft II11, and is fixedly connected with the second-stage reduction gear I16 and the gearbox output flange 13.

[0031] Two asynchronous motors are respectively connected to the first-stage reduction gear II14 and the first-stage reduction gear III21 via the connected gears. The first-stage reduction gear II14 and the first-stage reduction gear III21 are respectively fixed to the intermediate shaft III15 and the intermediate shaft IV22. The second-stage reduction gear II23 is fixed to the intermediate shaft III15 and the intermediate shaft IV22. The two second-stage reduction gears II23 are engaged with the second-stage reduction gear I16.

[0032] The two permanent magnet motors are permanent magnet motor I17 and permanent magnet motor II18, and the two asynchronous motors are asynchronous motor III19 and asynchronous motor IV20.

[0033] Two high-speed permanent magnet motors transmit torque and speed to the input shaft 2 of the 4-speed dual intermediate shaft transmission via the first-stage reduction gear I1; the transmission input shaft 2 transmits power to the intermediate shaft I5 and intermediate shaft II11 via the intermediate shaft long meshing gear 3; the intermediate shaft I5 and intermediate shaft II11 transmit power to the transmission output shaft 12 via the 1 / 2 gear sliding sleeve 9 and the 3 / 4 gear sliding sleeve 6 according to different vehicle speeds through the first gear 10 / second gear 8 / third gear 7 / fourth gear 4.

[0034] A high-speed asynchronous motor transmits torque and speed to intermediate shaft III15 via primary reduction gear II14; intermediate shaft III15 transmits power to transmission output shaft 12 via secondary reduction gears II23 and I16; another high-speed asynchronous motor transmits torque and speed to intermediate shaft IV22 via primary reduction gear III21; intermediate shaft IV22 transmits power to transmission output shaft 12 via secondary reduction gears II23 and I16.

[0035] The four motors are located at the four corners of the gearbox, and the four intermediate shafts are also located at the four corners of the gearbox, resulting in a compact structure.

[0036] Two high-speed permanent magnet motors achieve speed reduction and torque increase through a reducer and a four-speed gearbox. Two high-speed asynchronous motors are directly connected to the output shaft 12 through two-stage reduction. During the gear shifting process, the two asynchronous motors continue to output torque, so that the power output is uninterrupted.

[0037] The four intermediate shaft powertrain used in pure electric mining trucks can achieve uninterrupted torque shifting and power output in different gear modes.

[0038] Five gear modes can be switched via the 1 / 2 gear sliding sleeve 9, the 3 / 4 gear sliding sleeve 6, and the motor control mode.

[0039] like Figure 4 Gear Mode 1: After the permanent magnet motors I17 and II18 are adjusted in speed, the 1 / 2 gear sliding sleeve 9 is pushed to the right through the gear shifting actuator. The 1 / 2 gear sliding sleeve 9 meshes with the first gear gear 10. The permanent magnet motors I17 and II18 transmit torque and speed to the output shaft 12 through the first reduction gear I1, the intermediate shaft long meshing gear, the intermediate shaft I5 and the intermediate shaft II11, and the first gear 10. The asynchronous motor III19 transmits torque and speed to the output shaft 12 through the first reduction gear II14, the intermediate shaft III15, and the second reduction gear I16. The asynchronous motor IV20 transmits torque and speed to the output shaft 12 through the first reduction gear III21, the intermediate shaft IV22, and the second reduction gear II23.

[0040] like Figure 5Gear Mode 2: After the permanent magnet motors I17 and II18 are adjusted in speed, the 1 / 2 gear sliding sleeve 9 is pushed to the left by the gear shifting actuator. The 1 / 2 gear sliding sleeve 9 meshes with the second gear 8. The permanent magnet motors I17 and II18 transmit torque and speed to the output shaft 12 through the first-stage reduction gear I1, the intermediate shaft long meshing gear, the intermediate shaft I5 and the intermediate shaft II11, and the second gear 8. The asynchronous motor III19 transmits torque and speed to the output shaft 12 through the first-stage reduction gear II14, the intermediate shaft III15, and the second-stage reduction gear I16. The asynchronous motor IV20 transmits torque and speed to the output shaft 12 through the first-stage reduction gear III21, the intermediate shaft IV22, and the second-stage reduction gear II23.

[0041] like Figure 6 Gear Mode 3: After the permanent magnet motors I17 and II18 are adjusted in speed, the 3 / 4 gear sliding sleeve 6 is pushed to the right through the gear shifting actuator. The 3 / 4 gear sliding sleeve 6 meshes with the third gear 7. The permanent magnet motors I17 and II18 transmit torque and speed to the output shaft 12 through the first-stage reduction gear I1, the intermediate shaft long meshing gear, the intermediate shaft I5 and the intermediate shaft II11, and the third gear 7. The asynchronous motor III19 transmits torque and speed to the output shaft 12 through the first-stage reduction gear II14, the intermediate shaft III15, and the second-stage reduction gear I16. The asynchronous motor IV20 transmits torque and speed to the output shaft 12 through the first-stage reduction gear III21, the intermediate shaft IV22, and the second-stage reduction gear II23.

[0042] like Figure 7 Gear Mode 4: After the permanent magnet motors I17 and II18 are adjusted in speed, the 3 / 4 gear sliding sleeve 6 is pushed to the left by the gear shifting actuator. The 3 / 4 gear sliding sleeve 6 meshes with the fourth gear 4. The permanent magnet motors I17 and II18 transmit torque and speed directly to the output shaft 12 through the first-stage reduction gear I1 and the fourth gear 4. The asynchronous motor III19 transmits torque and speed to the output shaft 12 through the first-stage reduction gear II14, the intermediate shaft III15, and the second-stage reduction gear I16. The asynchronous motor IV20 transmits torque and speed to the output shaft 12 through the first-stage reduction gear III21, the intermediate shaft IV22, and the second-stage reduction gear II23.

[0043] like Figure 8 Gear Mode 5: After the permanent magnet motors I17 and II18 are adjusted in speed, the 3 / 4 gear sliding sleeve 6 is pushed to the left through the gear shifting actuator. The 3 / 4 gear sliding sleeve 6 meshes with the fourth gear 4. The permanent magnet motors I17 and II18 transmit torque and speed directly to the output shaft 12 through the first-stage reduction gear I1 and the fourth gear 4. The asynchronous motors III19 and IV20 follow the output shaft 12 and do not output torque.

[0044] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0045] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0046] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A four-intermediate-shaft powertrain for a pure electric mining truck, characterized in that, It includes two high-speed, low-torque permanent magnet motors and two high-speed asynchronous motors; Two permanent magnet motors are respectively connected to a first-stage reduction gear I (1) via a gear. The first-stage reduction gear I (1) is fixedly connected to the input shaft (2). The input shaft (2) and the output shaft (12) are coaxially opposite each other. The two sides of the input shaft (2) and the output shaft (12) are respectively intermediate shaft I (5) and intermediate shaft II (11). The input shaft (2) is splined to the intermediate shaft long meshing gear (3) and meshes with the fourth gear (4) on the intermediate shaft I (5) and intermediate shaft II (11) respectively. The output shaft (12) is fitted with 3 / 4 gear sliding sleeves in sequence. 6) The spline connects the output shaft to the third gear (26) and meshes with the third gear (7) on the intermediate shaft I (5) and intermediate shaft II (11); the spline connects the output shaft to the second gear (25) and meshes with the second gear (8) on the intermediate shaft I (5) and intermediate shaft II (11); a 1 / 2 gear sleeve (9) is fitted; the spline connects the output shaft to the first gear (24) and meshes with the first gear (10) on the intermediate shaft I (5) and intermediate shaft II (11); a second-stage reduction gear I (16) and a transmission output flange (13) are fixedly connected. Two asynchronous motors are respectively connected to the first-stage reduction gear II (14) and the first-stage reduction gear III (21) through the connected gears. The first-stage reduction gear II (14) and the first-stage reduction gear III (21) are respectively fixed to the intermediate shaft III (15) and the intermediate shaft IV (22). The second-stage reduction gear II (23) is fixed to the intermediate shaft III (15) and the intermediate shaft IV (22). The two second-stage reduction gears II (23) are connected to the second-stage reduction gear I (16).

2. The four intermediate shaft powertrain for pure electric mining trucks as described in claim 1, characterized in that, The two permanent magnet motors transmit torque and speed to the input shaft (2) through the first-stage reduction gear I (1); the input shaft (2) transmits power to the intermediate shaft I (5) and intermediate shaft II (11) through the intermediate shaft long meshing gear (3); the intermediate shaft I (5) and intermediate shaft II (11) transmit power to the output shaft (12) through the 1 / 2 gear sliding sleeve (9) or the 3 / 4 gear sliding sleeve (6) according to different vehicle speeds through the first gear (10) / second gear (8) / third gear (7) / fourth gear (4).

3. The four intermediate shaft powertrain for pure electric mining trucks as described in claim 1, characterized in that, One asynchronous motor transmits torque and speed to intermediate shaft III (15) through first-stage reduction gear II (14); intermediate shaft III (15) transmits power to output shaft (12) through second-stage reduction gear II (23) and second-stage reduction gear I (16); another high-speed asynchronous motor transmits torque and speed to intermediate shaft IV (22) through first-stage reduction gear III (21); intermediate shaft IV (22) transmits power to output shaft (12) through second-stage reduction gear II (23) and second-stage reduction gear I (16).

4. The four intermediate shaft powertrain for pure electric mining trucks as described in claim 1, characterized in that, The two permanent magnet motors and two asynchronous motors are located at the four corners of the transmission.

5. The four intermediate shaft powertrain for pure electric mining trucks as described in claim 1, characterized in that, The intermediate shafts I (5), II (11), III (15) and IV (22) are located at the four corners of the transmission, respectively.

6. The four intermediate shaft powertrain for pure electric mining trucks as described in claim 1, characterized in that, The 1 / 2 gear slide (9) can transmit torque and speed to the output shaft (12) through the first gear (10) or the second gear (8) by pushing it to the right or left; the 3 / 4 gear slide (6) can transmit torque and speed to the output shaft (12) through the third gear (7) or the fourth gear (4) by pushing it to the right or left; different gear modes can be switched through the 1 / 2 gear slide (9), the 3 / 4 gear slide (6) and the motor control mode.

7. The four intermediate shaft powertrain for pure electric mining trucks as described in claim 1, characterized in that, The two permanent magnet motors reduce speed and increase torque through a reducer and a four-speed gearbox; the two asynchronous motors are directly connected to the output shaft (12) through two-stage reduction. During the shifting process, the two asynchronous motors continue to output torque, so that the power output is uninterrupted.

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