Electromagnetic retarding single-motor four-gear heavy truck central driving box

Abstract

The utility model provides a central driving box of an electromagnetic retarding single-motor four-gear heavy truck. The electromagnetic retarding single-motor four-gear heavy truck central driving box comprises a motor, a transmission gear set, a planet row and an output shaft which are sequentially connected, the transmission gear set is provided with a first gear shifting mechanism, the output shaft is provided with an electromagnetic retarder, the transmission gear set comprises an input shaft, two intermediate shafts and a connecting shaft, the input shaft is connected with the motor, and the two intermediate shafts are connected with the connecting shaft. The first gear shifting mechanism is arranged on the input shaft and meshed with the two intermediate shafts at the same time, the first gear of the first gear shifting mechanism is connected with the intermediate shafts and the connecting shaft, and the second gear of the first gear shifting mechanism is connected with the input shaft and the connecting shaft. According to the electromagnetic retarding single-motor four-gear heavy truck central driving box, the problem that an existing driving product cannot meet the use requirement is solved.

Description

Technical Field

[0001] This utility model relates to the field of drive transmission devices, specifically to a central drive box for a heavy-duty truck with an electromagnetic slow-speed single motor and four gears. Background Technology

[0002] The new energy heavy-duty truck market is developing rapidly, with electric drive systems upgrading towards higher power density and higher reliability. However, due to complex terrain and diverse operating conditions, new energy heavy-duty trucks still face core pain points in scenarios such as mountain transportation and mining operations, including insufficient adaptability of the transmission system and high energy consumption. Existing products are inadequate in terms of lightweighting and reliability, failing to meet usage requirements. Utility Model Content

[0003] To address the problem that existing drive products cannot meet usage requirements, this utility model provides an electromagnetic slow-speed single-motor four-speed heavy truck central drive box that solves the above-mentioned problems.

[0004] A central drive box for a heavy-duty truck with an electromagnetic retarder single motor and four gears includes a motor, a transmission gear set, a planetary gear set, and an output shaft connected in sequence. The transmission gear set is equipped with a first shifting mechanism, and the output shaft is equipped with an electromagnetic retarder. The transmission gear set includes an input shaft, two intermediate shafts, and a connecting shaft. The input shaft is connected to the motor and simultaneously meshes with the two intermediate shafts. The first gear of the first shifting mechanism connects the intermediate shafts and the connecting shaft in one gear, and the second gear of the first shifting mechanism connects the input shaft and the connecting shaft in another gear.

[0005] In a preferred embodiment of the electromagnetic slow-speed single motor four-speed heavy truck central drive box provided by this utility model, the transmission gear set further includes an input tooth disposed on the input shaft, and a front intermediate tooth and a rear intermediate tooth disposed on the two intermediate shafts respectively. The input tooth meshes with the two front intermediate teeth at the same time, and the first gear of the first shifting mechanism meshes with the two rear intermediate teeth at the same time and is connected to the connecting shaft.

[0006] In a preferred embodiment of the electromagnetic slow-speed single motor four-speed heavy truck central drive box provided by this utility model, the first shifting mechanism includes a first shifting spline and a first shifting tooth. The first shifting spline is fixedly disposed on the connecting shaft, and the first shifting tooth is movably disposed on the connecting shaft and simultaneously meshes with the two rear intermediate teeth.

[0007] When the first shift mechanism is in second gear, the first shift spline is connected to the input tooth; when it is in first gear, the first shift spline is connected to the first shift tooth.

[0008] In a preferred embodiment of the electromagnetic slow-speed single-motor four-speed heavy-duty truck central drive box provided by this utility model, the connecting shaft is connected to the sun gear of the planetary gear set; the planet carrier of the planetary gear set is connected to the output shaft. The planetary gear set is provided with a second shifting mechanism.

[0009] In a preferred embodiment of the electromagnetic slow-speed single motor four-speed heavy truck central drive box provided by this utility model, the second shifting mechanism includes a fixed spline, a gear ring spline, and a second shifting spline. The fixed spline is fixed to the housing, the gear ring spline is disposed on the gear ring of the planetary gear set, and the second shifting spline is disposed on the output shaft.

[0010] When the second shift mechanism is in first gear, the second shift spline is connected to the fixed spline; when it is in second gear, the second shift spline is connected to the gear ring spline.

[0011] Compared with existing technologies, the electromagnetic slow-speed single-motor four-speed heavy truck central drive box provided by this utility model has the following beneficial effects:

[0012] 1. The solution provided by this utility model adopts a dual intermediate shaft scheme, forming a load-sharing design, reducing the torque load of a single shaft by 40%, increasing the transmission efficiency to 97%, and making power transmission highly efficient; on the other hand, it also forms a redundant design, which can still maintain 50% power output when a single shaft fails.

[0013] 2. The solution provided by this utility model adopts a lightweight design and achieves 4-speed transmission through a combination of dual intermediate shafts and planetary gears, reducing the weight by about 20% compared with the traditional multi-motor solution.

[0014] 3. The solution provided by this utility model has a compact structure and high integration. The rear end layout of the planetary gear optimizes the axial space and is suitable for the chassis layout of new energy heavy trucks.

[0015] 4. The solution provided by this utility model achieves a doubling of speed ratio through a planetary gear set, increases low-speed climbing torque by 30%, and reduces energy consumption in high-speed conditions by 15%, making it suitable for new energy heavy trucks. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the central drive box of a four-speed electromagnetic slow-moving single-motor heavy truck.

[0017] The following are the numbered components in the diagram: Motor 1, Transmission Gear Set 2, Input Shaft 21, Input Gear 22, Intermediate Shaft 23, Front Intermediate Gear 24, Rear Intermediate Gear 25, Connecting Shaft 26, Planetary Gear Set 3, Output Shaft 4, First Shift Mechanism 5, First Shift Spline 51, First Shift Gear 52, First Sliding Sleeve 53, Second Shift Mechanism 6, Second Shift Spline 61, Fixed Spline 62, Gear Ring Spline 63, Second Sliding Sleeve 64. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figure 1 This is a structural schematic diagram of the central drive box for a four-speed heavy-duty truck with an electromagnetic slow-speed single motor provided by this utility model.

[0020] The electromagnetic retarder single-motor four-speed heavy truck central drive box includes a motor 1, a transmission gear set 2, a planetary gear set 3, and an output shaft 4 connected in sequence. The transmission gear set 2 is equipped with a first shifting mechanism 5, the planetary gear set 3 is equipped with a second shifting mechanism 6, and the output shaft 4 is equipped with an electromagnetic retarder 7.

[0021] The transmission gear set 2 includes an input shaft 21, an input gear 22, two intermediate shafts 23, two front intermediate gears 24, two rear intermediate gears 25, and a connecting shaft 26.

[0022] The input shaft 21 is connected to the motor 1 and is equipped with input gears 22.

[0023] Two intermediate shafts 23 are arranged parallel to each other on both sides of the input shaft 21, with bearings at both ends, and a front intermediate tooth 24 and a rear intermediate tooth 25 are respectively provided near the ends. The front intermediate tooth 24 meshes with the input tooth 22, and the rear intermediate tooth 25 is connected to the connecting shaft 26 through the first shifting mechanism 5.

[0024] The connecting shaft 26 is coaxial with the input shaft 21.

[0025] The first shifting mechanism 5 includes a first shifting spline 51, a first shifting tooth 52, and a first sliding sleeve 53. The first shifting spline 51 is fixedly mounted on the connecting shaft 26, and the first shifting tooth 52 is movably mounted on the connecting shaft 26. The input tooth 22 has a spline on the side near the first shifting spline 51, and the first shifting tooth 52 also has a spline on the side near the first shifting spline 51.

[0026] The first sliding sleeve 53 engages adjacent splines, thereby connecting the input tooth 22 with the first shift spline 51, or connecting the first shift tooth 52 with the first shift spline 51.

[0027] When the first shift gear 52 is connected to the first shift spline 51, it is in a low gear position, which is recorded as the previous gear. The power is output to the connecting shaft 26 after being reduced in speed by the intermediate shaft 23.

[0028] When the input gear 22 is connected to the first shift spline 51, it is in the high gear position, which is recorded as the first two gears, and the power is directly output to the connecting shaft 26.

[0029] One end of the connecting shaft 26 is provided with a first shift spline 51, the middle section is provided with a bearing, and the other end is connected to the sun gear of the planetary gear set 3. The planet carrier of the planetary gear set 3 is connected to the output shaft 4. The output shaft 4 is coaxial with the connecting shaft 26 and extends away from the connecting shaft 26. After passing through the second shift mechanism 6, the output shaft 4 is provided with a bearing and is connected to the electromagnetic retarder 7.

[0030] The second shifting mechanism 6 includes a gear ring spline 63. The gear ring of the planetary gear set 3 is retracted and connected to the output shaft 4 via a bearing, and the gear ring spline 63 is provided on the outer side of the connection position.

[0031] The second shifting mechanism 6 also includes a second shifting spline 61 disposed on the output shaft 4, a fixed spline 62 disposed on the device housing, and a second sliding sleeve 64. The second shifting spline 61 and the fixed spline 62 are respectively disposed on both sides of the gear ring spline 63.

[0032] The output shaft 4 is coaxial with the connecting shaft 26 and extends away from the connecting shaft 26.

[0033] The adjacent splines are engaged by the second sliding sleeve 64, thereby connecting the gear ring spline 63 to the fixed spline 62, or connecting the gear ring spline 63 to the second shift spline 61.

[0034] When the gear ring spline 63 is connected to the fixed spline 62, it is in the low gear position, which is recorded as the next gear. The power is output to the output shaft 4 after being reduced by the planetary gear set 3.

[0035] When the gear ring spline 63 is connected to the second shift spline 61, it is in the high gear position, which is called the second gear. The planetary gear set 3 rotates as a whole, and the power is directly output to the output shaft 4.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A central drive box for a heavy-duty truck with an electromagnetic retarder single motor and four gears, characterized in that: The device includes a motor, a transmission gear set, a planetary gear set, and an output shaft connected in sequence. The transmission gear set is equipped with a first shifting mechanism, and the output shaft is equipped with an electromagnetic retarder. The transmission gear set includes an input shaft, two intermediate shafts, and a connecting shaft. The input shaft is connected to the motor and simultaneously meshes with the two intermediate shafts. The first shifting mechanism has a first gear that connects the intermediate shafts and the connecting shaft, and a second gear that connects the input shaft and the connecting shaft.

2. The electromagnetic retarder single-motor four-speed heavy truck central drive box according to claim 1, characterized in that: The transmission gear set also includes an input tooth disposed on the input shaft, and a front intermediate tooth and a rear intermediate tooth disposed on the two intermediate shafts respectively. The input tooth meshes with the two front intermediate teeth at the same time, and the first gear of the first shifting mechanism meshes with the two rear intermediate teeth at the same time and is connected to the connecting shaft.

3. The electromagnetic slow-speed single-motor four-speed heavy truck central drive box according to claim 2, characterized in that: The first shifting mechanism includes a first shifting spline and a first shifting tooth. The first shifting spline is fixedly disposed on the connecting shaft, and the first shifting tooth is movably disposed on the connecting shaft and simultaneously meshes with the two rear intermediate teeth.

4. The electromagnetic retarder single-motor four-speed heavy truck central drive box according to claim 3, characterized in that: When the first shift mechanism is in second gear, the first shift spline is connected to the input tooth; when it is in first gear, the first shift spline is connected to the first shift tooth.

5. The electromagnetic retarder single-motor four-speed heavy-duty truck central drive box according to any one of claims 1 to 4, characterized in that: The connecting shaft connects to the sun gear of the planetary set; the planet carrier of the planetary set connects to the output shaft.

6. The electromagnetic retarder single-motor four-speed heavy truck central drive box according to claim 5, characterized in that: The planetary gear set is equipped with a second shifting mechanism.

7. The electromagnetic retarder single-motor four-speed heavy truck central drive box according to claim 6, characterized in that: The second shifting mechanism includes a fixed spline, a gear ring spline, and a second shifting spline. The fixed spline is fixed to the housing, the gear ring spline is located on the gear ring of the planetary gear set, and the second shifting spline is located on the output shaft.

8. The electromagnetic retarder single-motor four-speed heavy truck central drive box according to claim 7, characterized in that: When the second shift mechanism is in first gear, the second shift spline is connected to the fixed spline; when it is in second gear, the second shift spline is connected to the gear ring spline.

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