Electric rotary system

Abstract

An electric rotation system comprises a motor, a parallel speed reducer, a brake and a rotation speed reducer, and is characterized in that the motor is inversely arranged on the side edge of the rotation speed reducer, the output end of the motor is arranged upwards, the parallel speed reducer is arranged above the motor, the input end of the parallel speed reducer is connected with the output end of the motor, and the parallel speed reducer stretches across the rotation speed reducer from the motor in the radial direction; the brake is an electromagnetic brake and is arranged at the top of the parallel speed reducer; and the output end of the parallel speed reducer is connected with the brake and the rotary speed reducer respectively. The axial length is reduced, the radial width is increased, the whole gravity center can be lowered, stability and safety are improved, rotation power is improved, the adaptability of an electric rotation system under severe working conditions is improved, and the service life of a brake is prolonged when the brake is applied to an excavator rotation system; the parallel speed reducer is applied to a horizontal directional drilling push-pull system, retracting and advancing efficiency can be improved, and therefore working efficiency is improved, the brake is installed on the top of the parallel speed reducer, maintenance is more convenient, and practicability is high.

Description

Technical Field

[0001] The utility model relates to an electric slewing system, belonging to the technical field of excavator slewing systems. Background Art

[0002] With the development of electric drive systems in the field of construction machinery, since the electric slewing system can achieve energy recovery, has high efficiency and reduced energy consumption, its application in construction machinery is becoming more and more extensive. The electric slewing system is assembled from an electric motor, a parallel reducer, a hydraulic brake and a slewing reducer in sequence from top to bottom.

[0003] When the electric slewing system is applied to the excavator slewing system, its axial length is relatively long, wasting a lot of axial length, resulting in a large layout space and high cost of the slewing system in the excavator, and increasing the center of gravity, reducing the stability of the slewing system; when applied to the horizontal directional drilling push-pull system, due to the low operating speed of the hydraulic brake, the forward and retraction speeds of the horizontal directional drill are slow, affecting the work efficiency, and it is not convenient to disassemble, install and replace the brake.

[0004] Furthermore, the existing electric slewing system has a large axial length and a narrow radial width, resulting in an insufficient speed ratio of the parallel reducer and a small output torque, and there is insufficient slewing power when applied to similar construction machinery such as excavators, truck cranes and rotary drilling rigs, and the adaptability under harsh working conditions is poor. Summary of the Utility Model

[0005] The electric slewing system provided by the utility model reduces the axial length and increases the radial width. When applied to the excavator slewing system, it can reduce the overall center of gravity, improve the stability and safety, enhance the slewing power, improve the adaptability of the electric slewing system under harsh working conditions, and extend the service life of the brake; when applied to the horizontal directional drilling push-pull system, it can improve the retraction and forward efficiency, thereby improving the work efficiency, and it is more convenient to install the brake on the top of the parallel reducer for maintenance, with high practicability.

[0006] To achieve the above object, the technical solution adopted by the utility model is:

[0007] An electric slewing system, comprising an electric motor, a parallel reducer, a brake and a slewing reducer, characterized in that: the electric motor is inverted on the side of the slewing reducer, the output end of the electric motor is arranged upward, the parallel reducer is arranged above the electric motor and the input end is connected with the output end of the electric motor, the parallel reducer spans from the electric motor to the slewing reducer along the radial direction, the brake is an electromagnetic brake and is installed on the top of the parallel reducer, and the output end of the parallel reducer is respectively connected with the brake and the slewing reducer.

[0008] Preferably, the top end of the motor is flush with the top end of the slewing reducer. The parallel reducer includes a housing fixedly connected to the motor and the slewing reducer respectively. An input shaft, a secondary shaft, and an output shaft are arranged in parallel along the radial direction in the housing. A first-stage reduction gear is sleeved on the secondary shaft in a spline fit manner. A second-stage reduction gear is integrally formed on the output shaft. The first-stage reduction gear meshes with the input shaft, the secondary shaft meshes with the second-stage reduction gear. The upper end of the output shaft is connected to the brake, and the lower end is connected to the input end of the slewing reducer.

[0009] Preferably, the upper end of the output shaft extends into the brake and is spline-connected to the brake disc, and the lower end extends into the slewing reducer.

[0010] Preferably, the top of the housing has a support ring extending upward and coaxially aligned with the output shaft. The brake is detachably mounted on the support ring by bolts.

[0011] Preferably, the outer diameter of the second-stage reduction gear is larger than that of the first-stage reduction gear. Weight-reducing holes are provided axially on both the first-stage reduction gear and the second-stage reduction gear.

[0012] The beneficial effects of the present utility model are as follows:

[0013] For the electric slewing system of the present utility model, the motor is inverted on the side of the slewing reducer, which not only reduces the axial length of the electric slewing system, and can reduce the overall center of gravity when applied to the slewing system of an excavator, improving stability and safety, but also increases the radial width of the electric slewing system, enabling the parallel reducer to span from the motor to the slewing reducer along the radial direction with a larger radial width, allowing for the installation of reduction gears with a larger diameter to increase the speed ratio, improve the output torque of the parallel reducer, enhance the output torque of the system, boost the slewing power, and improve the adaptability of the electric slewing system under harsh working conditions. At the same time, the large speed ratio can also reduce the output speed of the parallel reducer, making the output speed of the parallel reducer drop within the safe range of the brake, extending the service life of the brake; the electromagnetic brake is adopted, with higher braking efficiency. When applied to the horizontal directional drilling push-pull system, it not only shortens the axial length to increase the application scenarios, but also the working speed of the electromagnetic brake is higher, which can improve the efficiency of retraction and advancement, thereby improving the working efficiency. The brake is installed on the top of the parallel reducer, making maintenance and repair more convenient, and it has high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the electric slewing system in the specific embodiment.

[0015] Figure 2 For Figure 1 partial enlarged schematic diagram. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will Figures 1-2 describe the embodiments of the present utility model in detail.

[0017] An electric slewing system, comprising a motor 1, a parallel reducer 2, a brake 3 and a slewing reducer 4, is characterized in that: the motor 1 is inverted on the side of the slewing reducer 4, the output end of the motor 1 is arranged upward, the parallel reducer is arranged above the motor and its input end is connected to the output end of the motor, the parallel reducer extends radially from the motor across to the slewing reducer, the brake is an electromagnetic brake and is installed on the top of the parallel reducer, and the output end of the parallel reducer is respectively connected to the brake and the slewing reducer.

[0018] For the above-mentioned electric slewing system, inverting the motor 1 on the side of the slewing reducer 4 not only reduces the axial length of the electric slewing system, but also can reduce the overall center of gravity when applied to the slewing system of an excavator, improving stability and safety. Moreover, it increases the radial width of the electric slewing system, enabling the parallel reducer 2 to extend radially from the motor 1 across to the slewing reducer 4. With a larger radial width, a larger-diameter reduction gear can be set to increase the speed ratio, improve the output torque of the parallel reducer 2, enhance the output torque of the system, boost the slewing power, and improve the adaptability of the electric slewing system under harsh working conditions. At the same time, the large speed ratio can also reduce the output speed of the parallel reducer 2, making the output speed of the parallel reducer 2 fall within the safe range of the brake 3, extending the service life of the brake; adopting an electromagnetic brake, the braking efficiency is higher. When applied to the horizontal directional drilling push-pull system, it not only shortens the axial length to increase the application scenarios, but also the working speed of the electromagnetic brake is higher, which can improve the efficiency of retraction and advancement, thereby improving the working efficiency. Installing the brake 3 on the top of the parallel reducer 2 is more convenient for maintenance and has high practicality.

[0019] Among them, the top end of the motor 1 is flush with the top end of the slewing reducer 4. The parallel reducer 2 includes a housing 20 fixedly connected to the motor 1 and the slewing reducer 4 respectively. An input shaft 21, a secondary shaft 22 and an output shaft 23 are arranged in parallel in the housing 20 along the radial direction. A first-stage reduction gear 24 is sleeved on the secondary shaft 22 in a spline fit manner. A second-stage reduction gear 25 is integrally formed on the output shaft 23. The first-stage reduction gear 24 meshes with the input shaft 21, the secondary shaft 22 meshes with the second-stage reduction gear 25. The upper end of the output shaft 23 is connected to the brake 2, and the lower end is connected to the input end of the slewing reducer 4. The parallel reducer 2 is a two-stage parallel shaft reduction structure, with a larger radial width, enabling the selection of larger-diameter first-stage and second-stage reduction gears 24 and 25 to achieve a large speed ratio for input and output, improve the output torque, and reduce the motor power and energy consumption.

[0020] Among them, the upper end of the output shaft 23 extends into the brake 3 and is splined to the brake disc 31, and the lower end extends into the slewing reducer 4. The upper end of the output shaft 23 is splined with the brake disc 31 in the brake, rotates synchronously with the brake disc 31, and is braked with the braking of the brake disc 31, stopping the input of power to the slewing reducer 4. The connection structure of the output shaft 23 with the brake 3 and the slewing reducer 4 is simple and convenient for assembly and combination.

[0021] Among them, the top of the housing 20 has a support ring 26 that extends upward and is coaxially aligned with the output shaft 4, and the brake 3 is detachably mounted on the support ring 26 by bolts. The support ring 26 supports and positions the brake 3 above the parallel reducer 2, provides a space for the output shaft 23 to extend upward, and at the same time facilitates the disassembly and assembly of the brake 3, which is convenient for maintenance.

[0022] Among them, the outer diameter of the secondary reduction gear 25 is larger than the outer diameter of the primary reduction gear 24, and both the primary reduction gear 24 and the secondary reduction gear 25 are provided with weight reduction holes 27 arranged axially. The larger outer diameter of the secondary reduction gear 25 enables the parallel reducer 2 to obtain a large speed ratio. In order to reduce the weight of the parallel reducer 2 when selecting a reduction gear with a larger outer diameter, reduction holes 24 are respectively opened on the primary reduction gear 24 and the secondary reduction gear 25, reducing the weight while increasing the speed ratio to reduce energy consumption.

[0023] The technical solutions of the embodiments of the present invention are completely described above in conjunction with the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

Claims

1. An electric slewing system, comprising a motor, a parallel reducer, a brake and a slewing reducer, characterized in that: The motor is inverted on the side of the rotary reducer, the motor output end is set upward, the parallel reducer is set above the motor and the input end is connected to the motor output end, the parallel reducer spans radially from the motor to the rotary reducer, the brake is an electromagnetic brake and is installed on the top of the parallel reducer, and the output end of the parallel reducer is respectively connected to the brake and the rotary reducer.

2. The electric rotary system according to claim 1, characterized in that: The top of the motor is flush with the top of the rotary reducer. The parallel reducer includes a shell fixed to the motor and the rotary reducer respectively. The shell is equipped with an input shaft, a second shaft and an output shaft arranged in parallel in radial order. A primary reduction gear is splined on the second shaft, and a secondary reduction gear is integrally formed on the output shaft. The primary reduction gear is meshed with the input shaft, and the second shaft is meshed with the secondary reduction gear. The upper end of the output shaft is connected to the brake, and the lower end is connected to the input end of the rotary reducer.

3. The electric rotary system according to claim 2, characterized in that: The upper end of the output shaft extends into the brake and is spline-connected with the brake disc, and the lower end extends into the rotary reducer.

4. The electric rotary system according to claim 3, characterized in that: The top of the housing is provided with a support ring which protrudes upward and is coaxially aligned with the output shaft, and the brake is detachably mounted on the support ring by bolts.

5. The electric rotary system according to claim 2, characterized in that: The outer diameter of the secondary reduction gear is greater than the outer diameter of the primary reduction gear, and both the primary reduction gear and the secondary reduction gear are provided with weight-reducing holes arranged along the axial direction.

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