A small tonnage electric excavator

By adjusting the layout of the small-tonnage electric excavator, adopting a layered arrangement principle and replacing the counterweight with batteries, the problem of poor heat dissipation of electrical components was solved, achieving precise temperature control and improved safety performance, thereby increasing work efficiency.

CN120193569BActive Publication Date: 2026-07-21XCMG EXCAVATOR MACHINERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XCMG EXCAVATOR MACHINERY CO LTD
Filing Date
2025-04-24
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Due to space constraints, small-tonnage electric excavators have poor heat dissipation performance for electrical and hydraulic components, resulting in excessively high overall machine temperatures. This affects component performance and lifespan, posing safety hazards.

Method used

The layout of the electric excavator was adjusted to adopt a layered arrangement principle, with high-voltage wiring harnesses inside, low-voltage wiring harnesses in the middle, and water channels on the outside. The battery pack and air conditioning system share a heat exchanger, and the battery, electronic control and hydraulic cooling systems are independently controlled. The battery replaces the counterweight, optimizing space utilization.

Benefits of technology

It achieves precise temperature control, improves the overall thermal management capability of the machine, enhances safety performance, solves the problems of insufficient space and disordered pipelines, and improves work efficiency.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120193569B_ABST
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Abstract

The application discloses a small-tonnage electric excavator, which comprises a cab, a rotary table, a PTC heater A, a PTC heater B, a hydraulic pump, a motor, a high-voltage junction box, a compressor, a radiator module, a heat exchanger, a hydraulic oil tank, a battery pack, a four-in-one controller, a BMS, an on-board charger, a starting battery, a power supply master switch, a condenser assembly, an evaporator tank, an electronic expansion valve and a hydraulic actuator element, the cab is arranged on the front side of the rotary table, the lower end of the cab is of a special-shaped structure, that is, a notch is arranged at the lower part of the rear side of the cab, double-layer supports are arranged in the notch and used for supporting the cab and the rotary table, the hydraulic pump is connected with the hydraulic actuator element in series, the motor is arranged below the lower layer of the double-layer supports after being connected with the hydraulic pump in series, the high-voltage junction box and the compressor are arranged on the upper layer of the double-layer supports, and the remaining components are arranged above the rotary table, the special-shaped design of the cab solves the problems of insufficient space, insufficient power and pipeline disorder, and solves the problem of poor heat management capability of the whole machine.
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