Electric transmission system for engineering machinery

Abstract

The utility model discloses an electric transmission system for engineering machinery, which comprises a gearbox shell, a clutch shaft, an intermediate shaft and an output shaft which are sequentially in transmission connection through gears are mounted in the gearbox shell, and output flanges are arranged at two ends of the output shaft; a clutch is installed in the middle of a main body of the clutch shaft. A first disc hub gear and a second disc hub gear are arranged at the two ends of the clutch. A first intermediate shaft gear, a second intermediate shaft gear and a third intermediate shaft gear are sequentially installed on the intermediate shaft body, the first intermediate shaft gear is connected with the first disc hub gear in a meshed mode, and the third intermediate shaft gear is connected with the second disc hub gear in a meshed mode. And an output gear meshed with the second intermediate shaft gear is mounted on the output shaft. The adjustable speed ratio interval of a transmission system can be increased, the adaptability of the transmission system and an axle is improved, and the problem that power interruption is needed during gear shifting is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electric transmission system for engineering machinery belongs to the technical field of gearbox. BACKGROUND

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

[0003] In the prior art, the electric transmission system applied to engineering machinery has the following technical problems in the use process:

[0004] The speed ratio interval of the transmission system that can be adjusted is small, the adaptability of the transmission system to the axle needs to be improved, and there is a situation that power needs to be interrupted during gear shifting.

[0005] In summary, the prior art has obvious inconvenience and defects in actual use, and therefore needs to be improved. INVENTION CONTENTS

[0006] The utility model provides an electric transmission system for engineering machinery to solve the technical problems in the prior art, which can increase the speed ratio interval of the transmission system that can be adjusted, improve the adaptability to the axle, and solve the situation that power needs to be interrupted during gear shifting.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] An electric transmission system for engineering machinery, comprising a gearbox shell, a clutch shaft, an intermediate shaft and an output shaft connected in sequence through gears are installed inside the gearbox shell, and output flanges are provided at both ends of the output shaft; a clutch is installed in the middle part of the main body of the clutch shaft, and first and second disc hub gears are provided at both ends of the clutch; first, second and third intermediate shaft gears are installed in sequence on the main body of the intermediate shaft, the first intermediate shaft gear is connected in mesh with the first disc hub gear, and the third intermediate shaft gear is connected in mesh with the second disc hub gear; an output gear connected in mesh with the second intermediate shaft gear is installed on the output shaft.

[0009] Further, one end of the clutch shaft is connected with a driving motor.

[0010] Further, the clutch shaft, the intermediate shaft and the output shaft are arranged in parallel.

[0011] Further, both ends of the clutch shaft, the intermediate shaft and the output shaft are rotatably connected with the gearbox shell.

[0012] Further, the first disc hub gear is located at one end of the clutch close to the driving motor, and the second disc hub gear is located at one end of the clutch far from the driving motor.

[0013] Further, the second intermediate shaft gear is arranged close to the third intermediate shaft gear.

[0014] Further, the clutch is driven by hydraulic pressure.

[0015] Further, the clutch comprises an external clutch ring gear, two working cavities are arranged in the clutch ring gear, and a group of clutch plates is arranged in each working cavity, and the two groups of clutch plates are connected with the first disc hub gear and the second disc hub gear respectively.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The utility model discloses a second intermediate shaft gear is installed on the intermediate shaft and is engaged with the output gear on the output shaft, so that the speed ratio interval of the whole transmission system can be increased.

[0018] The utility model discloses that the output flange is arranged at both ends of the output shaft, and the output flange can be connected with the axle to improve the adaptability with the axle.

[0019] The utility model discloses that the clutch is controlled to realize the convenient switching of gear positions, so that the power requirement under different working conditions can be met, and the power interruption is not needed in the gear shifting process.

[0020] The utility model will be described in detail below by combining with the drawings and examples. DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of the utility model.

[0022] In the drawing, 1-speed change box shell, 2-clutch shaft, 3-intermediate shaft, 4-output shaft, 5-clutch, 6-first disc hub gear, 7-second disc hub gear, 8-first intermediate shaft gear, 9-second intermediate shaft gear, 10-third intermediate shaft gear, 11-output gear, 12-output flange. CONCRETE IMPLEMENTING METHOD

[0023] In order to have more clear understanding on the technical features, purposes and effects of the utility model, the specific implementing method of the utility model will be described by combining with the drawings.

[0024] For example, Figure 1The utility model provides a kind of electric transmission system for engineering machinery, including gearbox shell 1, gearbox shell 1 inside is equipped with clutch shaft 2, intermediate shaft 3 and output shaft 4 by gear transmission connection in turn, one end of clutch shaft 2 is connected with driving motor, and the both ends of output shaft 4 are equipped with output flange 12.

[0025] The output flange 12 can be connected with the axle, and the adaptability with the axle is improved by setting two output flanges 12.

[0026] The driving motor inputs power into the gearbox shell 1, and the power is output to the axle by the output flange 12 after being transmitted by the clutch shaft 2, the intermediate shaft 3 and the output shaft 4.

[0027] The clutch shaft 2, the intermediate shaft 3 and the output shaft 4 are arranged in parallel, and the both ends of the clutch shaft 2, the intermediate shaft 3 and the output shaft 4 are rotatably connected with the gearbox shell 1.

[0028] The main body of the clutch shaft 2 is provided with a clutch 5, one end of the clutch 5 close to the driving motor is connected with a first disc hub gear 6, and the other end of the clutch 5 away from the driving motor is connected with a second disc hub gear 7.

[0029] The clutch 5 is driven by hydraulic transmission, the clutch 5 includes an external clutch gear, two working cavities are arranged in the clutch gear, and a group of clutch plates are arranged in each working cavity, and the two groups of clutch plates are connected with the first disc hub gear 6 and the second disc hub gear 7 respectively.

[0030] The first intermediate shaft gear 8, the second intermediate shaft gear 9 and the third intermediate shaft gear 10 are sequentially arranged on the main body of the intermediate shaft 3.

[0031] The first intermediate shaft gear 8 is meshedly connected with the first disc hub gear 6, the third intermediate shaft gear 10 is meshedly connected with the second disc hub gear 7, and the second intermediate shaft gear 9 is arranged close to the third intermediate shaft gear 10.

[0032] The output shaft 4 is fixedly provided with an output gear 11, and the output gear 11 is meshedly connected with the second intermediate shaft gear 9. By arranging the second intermediate shaft gear 9 on the intermediate shaft 3, the speed ratio range of the whole transmission system can be increased.

[0033] The specific working principle of the utility model is as follows:

[0034] The driving motor inputs power into the gearbox shell 1, and the power is output to the axle by the output flange 12 after being transmitted by the clutch shaft 2, the intermediate shaft 3 and the output shaft 4. By controlling the rotating speed and torque output of the driving motor, the speed changing effect of the mechanical system is realized. By controlling the clutch 5, the convenient switching of gears is realized.

[0035] Power transmission route one: drive motor → clutch shaft 2 → first disc hub gear 6 → first intermediate shaft gear 8 → intermediate shaft 3 → second intermediate shaft gear 9 → output gear 11 → output shaft 4 → output flange 12 → axle;

[0036] Power transmission route two: drive motor → clutch shaft 2 → second disc hub gear 7 → third intermediate shaft gear 10 → intermediate shaft 3 → second intermediate shaft gear 9 → output gear 11 → output shaft 4 → output flange 12 → axle.

[0037] The above is an example of the best embodiment of the present application, wherein the parts not described in detail are the common knowledge of those skilled in the art. The protection scope of the present application is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present application is also within the protection scope of the present application.

Claims

1. An electric drive system for a construction machine, characterized by: The gearbox shell (1) is internally provided with a clutch shaft (2), an intermediate shaft (3) and an output shaft (4) which are sequentially connected by gear transmission, and the output shaft (4) is provided with output flanges (12) at both ends; the main body of the clutch shaft (2) is provided with a clutch (5) in the middle, and the clutch (5) is provided with a first disc hub gear (6) and a second disc hub gear (7) at both ends; the main body of the intermediate shaft (3) is sequentially provided with a first intermediate shaft gear (8), a second intermediate shaft gear (9) and a third intermediate shaft gear (10), the first intermediate shaft gear (8) is in meshing connection with the first disc hub gear (6), and the third intermediate shaft gear (10) is in meshing connection with the second disc hub gear (7); the output shaft (4) is provided with an output gear (11) in meshing connection with the second intermediate shaft gear (9).

2. An electric drive system for a construction machine according to claim 1, characterized in that: One end of the clutch shaft (2) is connected with a driving motor.

3. An electric drive system for a construction machine as claimed in claim 1, characterized in that: The clutch shaft (2), the intermediate shaft (3) and the output shaft (4) are arranged in parallel.

4. An electric drive system for a construction machine as claimed in claim 3, characterised in that: Both ends of the clutch shaft (2), the intermediate shaft (3) and the output shaft (4) are in rotary connection with the gearbox shell (1).

5. An electric drive system for a construction machine as claimed in claim 1, characterized in that: The first disc hub gear (6) is located at one end of the clutch (5) close to the driving motor, and the second disc hub gear (7) is located at the other end of the clutch (5) away from the driving motor.

6. An electric drive system for a construction machine as claimed in claim 1, characterized in that: The second intermediate shaft gear (9) is arranged close to the third intermediate shaft gear (10).

7. An electric drive system for a construction machine as claimed in claim 1, characterized in that: The clutch (5) is driven by hydraulic transmission.

8. An electric drive system for a construction machine as claimed in claim 7, characterised in that: The clutch (5) comprises an external clutch ring gear, two working cavities are arranged in the clutch ring gear, and a group of clutch plates are arranged in each working cavity, and the two groups of clutch plates are connected with the first disc hub gear (6) and the second disc hub gear (7) respectively.

Images