High-speed driving system of electric engineering machinery

Abstract

The utility model provides a high-speed driving system of electric engineering machinery. The high-speed driving system of the electric engineering machinery comprises a motor and a speed reducer which are in shaft connection, the speed reducer comprises a high-speed reducer and a low-speed reducer, and the motor, the high-speed reducer and the low-speed reducer are sequentially in shaft connection. According to the high-speed driving system of the electric engineering machinery, the problems that the cost of the driving system is too high and the braking is difficult after the engineering machinery is electrified are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of drive system, concretely relates to a kind of electric engineering machinery high-speed drive system. BACKGROUND

[0002] With the enhancement of global environmental protection consciousness and the transformation of energy structure, electric engineering machinery becomes an important trend of industry development.The electric engineering machinery is gradually replaced by traditional fuel equipment with its zero emission, low noise and high efficiency, and is widely used in construction, mining, agriculture and other fields.In the field of engineering machinery, the drive system is required to have high power and large torque output to complete difficult tasks.Currently, the rotary system on the market usually adopts the scheme of hydraulic drive plus planetary reducer.But in the case of electrification, if the drive system is changed to the scheme of motor plus planetary reducer, due to the high cost of large torque motor, the cost of the whole rotary system rises, and the assembly brake is difficult to brake in the case of defects. SUMMARY

[0003] To solve the problem of high cost and brake difficulty of drive system after electric engineering machinery, the utility model provides a kind of electric engineering machinery high-speed drive system to solve the above problems.

[0004] A kind of electric engineering machinery high-speed drive system, including shaft connection motor and speed reducer, the speed reducer includes high-speed reducer and low-speed reducer, the motor, the high-speed reducer and the low-speed reducer are sequentially shaft connected.It also includes oil pump, the oil pump is arranged outside the shell of the speed reducer, the oil inlet and oil outlet of the oil pump are respectively located at the low-speed reducer and the high-speed reducer, and penetrate into the shell of the speed reducer;It also includes brake, one or more of the output shaft of the motor, the output shaft of the high-speed reducer and the output shaft of the low-speed reducer is equipped with the brake.

[0005] In a preferred embodiment of the electric engineering machinery high-speed drive system provided by the utility model, the motor is a motor with a controller.The high-speed reducer and the low-speed reducer are both planetary reducers.The high-speed reducer is a planetary reducer with a one-stage planetary reduction mechanism, and the low-speed reducer is a planetary reducer with a multi-stage planetary reduction mechanism.

[0006] In a preferred embodiment of the electric engineering machinery high-speed drive system provided by the utility model, the low-speed reducer is a planetary reducer with a three-stage planetary reduction mechanism.

[0007] In a preferred embodiment of the high-speed drive system of the electric engineering machinery provided by the utility model, the oil inlet end of the oil pump penetrates between the two-stage planetary reduction mechanisms of the tail end of the low-speed reduction machine; and the oil outlet end penetrates the planetary gear position of the high-speed reduction machine.

[0008] In a preferred embodiment of the high-speed drive system of the electric engineering machinery provided by the utility model, a brake is arranged on the output shaft of the high-speed reduction machine.

[0009] Compared with the prior art, the high-speed drive system of the electric engineering machinery provided by the utility model has the following beneficial effects:

[0010] 1. The high-speed reduction machine and the low-speed reduction machine are matched in the utility model, high torsion that meets the use demand of the engineering machinery is realized through multi-stage reduction, and the problem that the cost of the whole slewing assembly rises due to the excessively high cost of the large-torsion motor is solved.

[0011] 2. The brake is arranged between the high-speed reduction machine and the low-speed reduction machine in the utility model, the problem of excessively high braking speed can be avoided, the braking torque can be reduced, and the problem that the assembly is difficult to brake in the case of defects of the high-speed brake is solved.

[0012] 3. The oil pump is arranged in the utility model, oil is pumped from the low-speed planetary reduction machine to lubricate the high-speed planetary reduction machine, and the oil stirring loss caused by excessively high speed of the high-speed planetary reduction machine is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the high-speed drive system of the electric engineering machinery.

[0014] In the drawing, the reference numerals are as follows: motor 1, reduction device 2, oil pump 3, shell 21, high-speed reduction machine 22, one reduction 23, two reduction 24, three reduction 25, hydraulic brake 26. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0016] Please refer to Figure 1 is a structural schematic view of the high-speed drive system of the electric engineering machinery provided by the utility model.

[0017] The high-speed drive system of the electric engineering machinery comprises a motor 1, a reduction device 2 and an oil pump 3.

[0018] The motor 1 is a motor that provides fixed power, or a motor that is provided with a controller.

[0019] The speed reduction device 2 comprises a housing 21, a high-speed reduction machine 22 and a low-speed reduction machine arranged in the housing. The high-speed reduction machine 22 comprises a one-stage planetary reduction mechanism, and the low-speed reduction machine comprises a three-stage planetary reduction mechanism, which are respectively denoted as a first reduction 23, a second reduction 24 and a third reduction 25.

[0020] The planetary reduction mechanism is a commonly used device in the art, and its specific structure and working principle are not described herein. After the speed reduction relationship of the planetary reduction mechanism is described, a person skilled in the art can freely select details such as the speed reduction ratio according to actual conditions.

[0021] The sun gear shaft of the high-speed reduction machine 22 is connected with the output shaft of the motor 1, the planetary carrier is connected with the sun gear shaft of the first reduction 23, and the same applies to the second reduction 24 and the third reduction 25. A hydraulic brake 26 is arranged on the connecting shaft between the high-speed reduction machine 22 and the first reduction 23.

[0022] The hydraulic brake 26 is a commonly used device in the art, and its specific structure and working principle are not described herein. After the braking timing of the hydraulic brake 26 is described, a person skilled in the art can freely select details such as the braking force according to actual conditions.

[0023] The oil pump 3 is arranged outside the housing 21. The housing 21 is provided with an oil passage that penetrates to the outside at the upper side of the planetary gear of the high-speed reduction machine 22, which is denoted as an upper oil passage. Another oil passage that penetrates to the outside is arranged between the second reduction 24 and the third reduction 25, which is denoted as a lower oil passage. The oil inlet end of the oil pump 3 is connected with the lower oil passage through an oil pipe, and the oil outlet end is connected with the upper oil passage through an oil pipe.

[0024] The oil pump 3 is a commonly used device in the art, and its specific structure and working principle are not described herein. After the oil pumping direction of the oil pump 3 is described, a person skilled in the art can freely select details such as the type and installation mode of the oil pump according to actual conditions.

[0025] In use, the high-speed output of the motor 1 is sequentially reduced through the high-speed reduction machine 22 to the third reduction 25, and finally a high torque that meets the use requirements of the engineering machinery is output. The hydraulic brake 26 is braked in cooperation when the output end is braked. The oil pump 3 is started synchronously when the motor 1 outputs, and pumps oil from the low-speed reduction machine to the high-speed reduction machine 22 for active lubrication.

[0026] The above is only an embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields based on the content of the present application, is also included in the patent protection range of the present application.

Claims

1. A high speed drive system for an electrically powered construction machine comprising a shaft connected electric motor and a reduction device, characterised in that: The speed reduction device comprises a high-speed speed reducer and a low-speed speed reducer, the motor, the high-speed speed reducer and the low-speed speed reducer are sequentially connected in shaft; further comprising an oil pump, the oil pump is arranged outside the casing of the speed reduction device, the oil inlet end and the oil outlet end of the oil pump are respectively located at the low-speed speed reducer and the high-speed speed reducer, and penetrate into the casing of the speed reduction device; further comprising a brake, one or more of the output shaft of the motor, the output shaft of the high-speed speed reducer and the output shaft of the low-speed speed reducer are provided with the brake.

2. The electrically powered construction machine high speed drive system of claim 1, characterized by: The motor is a motor with a controller; the high-speed speed reducer and the low-speed speed reducer are both planetary reducers.

3. The electrically powered construction machine high speed drive system of claim 2, characterized by: The high-speed speed reducer is a planetary reducer with a one-stage planetary speed reduction mechanism, and the low-speed speed reducer is a planetary reducer with a multi-stage planetary speed reduction mechanism.

4. The electrically powered construction machine high speed drive system of claim 3, characterized by: The low-speed speed reducer is a planetary reducer with a three-stage planetary speed reduction mechanism.

5. The electrically powered construction machine high speed drive system of claim 4, characterized by: The oil inlet end of the oil pump penetrates between the two-stage planetary speed reduction mechanisms at the tail end of the low-speed speed reducer; and the oil outlet end penetrates to the planetary gear position of the high-speed speed reducer.

6. The electrically powered construction machine high speed drive system of claim 1, wherein: The output shaft of the high-speed speed reducer is provided with a brake.

7. The electrically powered construction machine high speed drive system of claim 6, characterized by: The brake is a hydraulic brake.

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