Double-motor driving mechanism of excavator

Abstract

A double motor driving mechanism of excavator, including speed reducer, power input mechanism and shock absorber, the speed reducer and power input mechanism are assembled on the frame of excavator through shock absorber, the output shaft of speed reducer is connected with the power of excavator, the power input mechanism is connected with the input shaft of speed reducer, the power input mechanism includes multiple motors, and multiple motors drive the input shaft of speed reducer together, the utility model discloses solve the problem of harsh requirement of high-power excavator oil-electricity element, high cost in the prior art, with simple motor series connection scheme, and based on speed reducer, the effect of reducing working current is realized, that is, the procurement cost is reduced, and the operation safety of equipment is improved, and it is a better choice for driving large excavator oil-electricity power configuration.

Description

Technical Field

[0001] This utility model relates to the field of excavator drives, and in particular to a dual-motor drive mechanism for excavators. Background Technology

[0002] With increasingly stringent environmental regulations and the growing trend of converting oil-powered machinery to electric power, the need for electrification of the power systems of large excavators is becoming increasingly urgent. However, large excavators typically require power exceeding 500 kilowatts, resulting in extremely high operating currents. This high current not only places stringent demands on electrical components such as cables and connectors, but more importantly, the selection of mature frequency converters capable of stably driving such high-power single motors is very limited and expensive. Furthermore, the direct starting of a high-power motor generates a massive inrush current, posing challenges to both the power grid and the equipment itself. This severely restricts the electrification process of large excavators.

[0003] Therefore, there is an urgent need for an electric drive solution for large excavators that can reduce operating current, improve system reliability, and is easy to implement. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a dual-motor drive mechanism for excavators that is simple in structure, reduces operating current, improves operational reliability, and is particularly easy to implement.

[0005] The equipment includes a speed reducer, a power input mechanism, and a shock absorber. The speed reducer and the power input mechanism are mounted on the frame of the excavator via the shock absorber. The output shaft of the reducer is connected to the excavator's power supply. The power input mechanism is powered to the input shaft of the reducer; the power input mechanism includes multiple motors, and the multiple motors jointly drive the input shaft of the reducer.

[0006] The effect achieved in this way is that, based on the physical connection between multiple motors and the input shaft of the reducer, the synchronous drive of multiple motors can be achieved, and the speed change of the reducer can reduce the power requirements of the motors. In other words, the operating current is reduced, and the operation is more reliable and stable. The beneficial effects of this invention are as follows: This invention solves the problems of stringent requirements and high costs associated with converting high-power excavators from hydraulic to electric power systems in the prior art; it achieves the effect of reducing operating current through a simple motor series connection scheme and a reducer. This reduces procurement costs, improves equipment operating safety, and is a better choice for driving large excavators with converted hydraulic to electric power configurations. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of a dual-motor drive mechanism for an excavator according to the present invention; Figure 2 This is a schematic diagram of the assembly of a dual-motor drive mechanism for an excavator according to the present invention; Figure 3 yes Figure 2 A schematic diagram of a partial structure; Figure 4 This is an assembly diagram of the power input mechanism, and also a structural diagram of Embodiment 2; Figure label: 1-Reducer 2-First Motor 3-Second Motor 4-Shock Absorber 5-Frame The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0008] Reference Figure 1 , Figure 2 The present invention provides a dual-motor drive mechanism for an excavator, comprising a reducer 1, a power input mechanism, and a shock absorber 4. The reducer 1 and the power input mechanism are mounted on the frame 5 of the excavator via the shock absorber 4. The output shaft of the reducer 1 is connected to the excavator's power supply. The power input mechanism is powered to the input shaft of the reducer 1; the power input mechanism includes multiple motors, and the multiple motors jointly drive the input shaft of the reducer 1.

[0009] The effect achieved is that, based on the physical connection between multiple motors and the input shaft of reducer 1, the synchronous drive of multiple motors and the speed change of reducer 1 can reduce the power requirements of the motors, thereby achieving the effect of reducing the operating current and making the operation more reliable and stable. Example 1: The shock absorber 4 is a rubber shock absorber, which includes a base portion fixedly mounted on the excavator frame 5 and an elastic pad portion thereof. The elastic pad portion is fixedly connected to the power input mechanism.

[0010] That is, its elastic padding acts as an elastic buffer to avoid violent vibrations and thus reduce shock.

[0011] Example 2, refer to the accompanying drawings in the specification. Figure 1 or Figure 4 The power input mechanism includes a first motor 2 and a second motor 3, which are coaxially arranged.

[0012] Furthermore, the rotor shafts of the first motor 2 and the second motor 3 are connected by a spline connection or a flange connection.

[0013] This achieves the synchronous power transmission between two motors with a simplified structure and a volume constraint within a certain range.

[0014] In embodiment 3, the reducer 1 is provided with multiple input shafts and one output shaft; The power input mechanism contains multiple motors that are each powered to their input shafts, that is, the motors and the input shafts are powered to each other via couplings. The output shaft of the reducer 1 is connected to the excavator power supply.

[0015] Preferably, multiple motors are also connected to a gearbox, and the gearbox powers the reducer 1.

[0016] The effect achieved in this way is that it is easier to split and maintain.

[0017] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0018] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-motor drive mechanism for an excavator, comprising a reducer, a power input mechanism, and a shock absorber, characterized in that: The speed reducer and power input mechanism are mounted on the excavator frame via shock absorbers; the output shaft of the speed reducer is connected to the excavator's power supply. The power input mechanism is powered to the input shaft of the reducer; the power input mechanism includes multiple motors, and the multiple motors jointly drive the input shaft of the reducer.

2. The dual-motor drive mechanism for an excavator according to claim 1, characterized in that, The shock absorber is a rubber shock absorber, which includes a base portion fixedly mounted on the excavator frame and an elastic pad portion thereof. The elastic pad portion is fixedly connected to the power input mechanism.

3. The dual-motor drive mechanism for an excavator according to claim 1, characterized in that, The power input mechanism includes a first motor and a second motor, which are coaxially arranged.

4. The dual-motor drive mechanism for an excavator according to claim 3, characterized in that, The rotor shafts of the first motor and the second motor are connected by a spline connection or a flange connection.

5. The dual-motor drive mechanism for an excavator according to claim 1, characterized in that, The speed reducer is equipped with multiple input shafts and one output shaft; The power input mechanism contains multiple motors that are each powered to their input shafts, that is, the motors and the input shafts are powered to each other via couplings. The output shaft of the reducer is connected to the excavator's power supply.

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