Electrically-driven gearbox

Abstract

The utility model discloses an electric drive gearbox which comprises a gearbox shell, a driving shaft, a middle shaft and an output shaft which are sequentially in transmission connection through gears are installed in the gearbox shell, one end of the driving shaft is connected with a driving motor, and one end of the output shaft is connected with an input shaft in a front axle. A first-gear driving gear, a clutch and a second-gear driving gear are mounted on the driving shaft, and the first-gear driving gear and the second-gear driving gear are connected to the left side and the right side of the clutch; a first-gear driven gear and a second-gear driven gear are fixedly installed at the two ends of a main body of the intermediate shaft, the first-gear driven gear is connected with the first-gear driving gear in a meshed mode, and the second-gear driven gear is connected with the second-gear driving gear in a meshed mode. And an output gear meshed with the second-gear driven gear is fixedly mounted on the output shaft. The multi-gear speed change gearbox can carry out multi-gear speed change, meets power requirements in different working states, simplifies an internal transmission structure of the gearbox, reduces transmission efficiency loss, and effectively improves economical efficiency.

Description

Technical Field

[0001] The utility model relates to an electric drive gearbox and belongs to the technical field of gearboxes. Background Art

[0002] The electric drive gearbox is a device that converts electrical energy into mechanical energy. It achieves the speed change effect of the mechanical system by controlling the speed and torque output of the motor. The electric drive gearbox includes a motor and a gear transmission system. The motor outputs power from the output shaft through the gear transmission system.

[0003] In the prior art, electric drive transmissions used in engineering vehicles generally have the following technical problems during use: it is not convenient to perform multi-speed shifting according to the power requirements under different working conditions, and the output torque is too high, resulting in a decrease in power utilization, and the economy needs to be improved; the existing gear transmission system structure is relatively complex, and the transmission chain is long, resulting in a large loss of transmission efficiency.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] The utility model aims at the deficiencies in the background technology and provides an electric drive gearbox which can perform multi-speed shifting to adapt to the power requirements under different working conditions, simplifies the internal transmission structure of the gearbox, reduces transmission efficiency loss, and effectively improves economy.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An electric drive gearbox, comprising a gearbox housing, wherein a driving shaft, an intermediate shaft and an output shaft are installed inside the gearbox housing and are sequentially connected through gears, one end of the driving shaft is connected to a driving motor, and one end of the output shaft is connected to an input shaft in a front axle;

[0008] A first-gear driving gear, a clutch and a second-gear driving gear are installed on the driving shaft, and the first-gear driving gear and the second-gear driving gear are connected to the left and right sides of the clutch; a first-gear driven gear and a second-gear driven gear are fixedly installed on both ends of the main body of the intermediate shaft, and the first-gear driven gear is meshed and connected with the first-gear driving gear, and the second-gear driven gear is meshed and connected with the second-gear driving gear; an output gear meshed and connected with the second-gear driven gear is fixedly installed on the output shaft.

[0009] Furthermore, the driving shaft, intermediate shaft and output shaft are arranged in parallel.

[0010] Furthermore, both ends of the driving shaft, the intermediate shaft and the output shaft are rotatably connected to the gearbox housing.

[0011] Furthermore, the axis of the output shaft is arranged colinearly with the axis of the input shaft in the front axle.

[0012] Furthermore, the clutch is driven by hydraulic pressure.

[0013] Furthermore, the clutch includes an external clutch ring gear, and two working chambers are arranged inside the clutch ring gear. A group of clutch plates are arranged in each working chamber, wherein one group of clutch plates is connected to the first gear driving gear, and the other group of clutch plates is connected to the second gear driving gear.

[0014] Furthermore, the transmission case is in an L-shaped structure as a whole, and the outer wall surface of the L-shaped structure is fixedly connected to the axle housing of the front axle.

[0015] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0016] The transmission case is equipped with a driving shaft, an intermediate shaft and an output shaft which are sequentially connected through gears. One end of the driving shaft is connected to the drive motor, and one end of the output shaft is connected to the input shaft in the front axle. The transmission structure inside the transmission case is simple and reasonable, which can effectively reduce the transmission efficiency loss.

[0017] The utility model realizes convenient switching of gears by controlling the clutch, and can perform multi-gear speed change to adapt to the power requirements under different working conditions, thereby effectively improving the economy;

[0018] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] In the figure, 1-front axle, 2-first gear driving gear, 3-second gear driving gear, 4-first gear driven gear, 5-second gear driven gear, 6-output gear, 7-driving shaft, 8-intermediate shaft, 9-output shaft, 10-clutch, 11-transmission housing, 12-input shaft. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0022] like Figure 1As shown, the utility model provides an electric drive gearbox, including a gearbox housing 11, wherein a driving shaft 7, an intermediate shaft 8 and an output shaft 9 which are sequentially connected through gears are installed inside the gearbox housing 11, one end of the driving shaft 7 is connected to a driving motor, and the driving motor inputs torque into the gearbox housing 11, and one end of the output shaft 9 is connected to an input shaft 12 in a front axle 1, and the output shaft 9 inputs torque into the front axle 1.

[0023] The driving shaft 7 , the intermediate shaft 8 and the output shaft 9 are arranged in parallel, and both ends of the driving shaft 7 , the intermediate shaft 8 and the output shaft 9 are rotatably connected to the transmission case 11 .

[0024] The axis of the output shaft 9 is arranged colinearly with the axis of the input shaft 12 in the front axle 1 .

[0025] A clutch 10 is installed in the middle of the main body of the driving shaft 7 , and a first gear driving gear 2 and a second gear driving gear 3 are provided at both ends of the main body of the driving shaft 7 . The first gear driving gear 2 and the second gear driving gear 3 are connected to the left and right sides of the clutch 10 .

[0026] The clutch 10 is hydraulically driven and includes an external clutch gear ring. Two working chambers are arranged inside the clutch gear ring. A group of clutch plates are arranged in each working chamber. One group of clutch plates is connected to the first gear driving gear 2, and the other group of clutch plates is connected to the second gear driving gear 3.

[0027] A first-gear driven gear 4 and a second-gear driven gear 5 are fixedly mounted on both ends of the main body of the intermediate shaft 8 . The first-gear driven gear 4 is meshedly connected with the first-gear driving gear 2 , and the second-gear driven gear 5 is meshedly connected with the second-gear driving gear 3 .

[0028] The output shaft 9 is fixedly mounted with an output gear 6 , which is meshedly connected with the second-gear driven gear 5 .

[0029] The gearbox housing 11 is in an L-shaped structure as a whole, and the outer wall of the L-shaped structure is fixedly connected to the axle housing of the front axle 1, so that the overall structure formed by the gearbox housing 11 and the front axle 1 is compact and reasonable, saves space, and has a firm structure.

[0030] The specific working principle of this utility model:

[0031] The torque input end of the gearbox is connected to the drive motor, and the torque output end of the gearbox is connected to the axle. By controlling the speed and torque output of the drive motor, the speed change effect of the mechanical system is achieved. By controlling the clutch, convenient gear switching is achieved.

[0032] Power transmission route 1: driving motor → driving shaft 7 → first gear driving gear 2 → first gear driven gear 4 → intermediate shaft 8 → second gear driven gear 5 → output gear 6 → output shaft 9 → front axle 1;

[0033] Power transmission route two: drive motor → driving shaft 7 → second gear driving gear 3 → second gear driven gear 5 → output gear 6 → output shaft 9 → front axle 1.

[0034] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. An electric drive gearbox, characterized in that: The transmission case (11) comprises a driving shaft (7), an intermediate shaft (8) and an output shaft (9) which are sequentially connected by gears, and the driving shaft (7) is installed inside the transmission case (11); one end of the driving shaft (7) is connected to a driving motor, and one end of the output shaft (9) is connected to an input shaft (12) in a front axle (1); The driving shaft (7) is mounted with a first gear driving gear (2), a clutch (10) and a second gear driving gear (3), the first gear driving gear (2) and the second gear driving gear (3) being connected to the left and right sides of the clutch (10); the first gear driven gear (4) and the second gear driven gear (5) are fixedly mounted on both ends of the main body of the intermediate shaft (8), the first gear driven gear (4) is meshingly connected to the first gear driving gear (2), and the second gear driven gear (5) is meshingly connected to the second gear driving gear (3); and the output shaft (9) is fixedly mounted with an output gear (6) meshingly connected to the second gear driven gear (5).

2. An electric drive gearbox according to claim 1, characterized in that: The driving shaft (7), the intermediate shaft (8) and the output shaft (9) are arranged in parallel.

3. An electric drive gearbox according to claim 2, characterized in that: Both ends of the driving shaft (7), the intermediate shaft (8) and the output shaft (9) are rotatably connected to the transmission case (11).

4. An electric drive gearbox according to claim 1, characterized in that: The axis of the output shaft (9) is arranged colinearly with the axis of the input shaft (12) in the front axle (1).

5. The electric drive gearbox according to claim 1, characterized in that: The clutch (10) is hydraulically driven.

6. An electric drive gearbox according to claim 5, characterized in that: The clutch (10) comprises an external clutch gear ring, wherein two working chambers are arranged inside the clutch gear ring, and each working chamber is provided with a group of clutch plates, wherein one group of clutch plates is connected to a first gear driving gear (2), and the other group of clutch plates is connected to a second gear driving gear (3).

7. The electric drive gearbox according to claim 1, characterized in that: The transmission case (11) is in an L-shaped structure as a whole, and the outer wall surface of the L-shaped structure is fixedly connected to the axle housing of the front axle (1).

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