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KR-102962303-B1 - POWER CIRCULATION LOAD SYSTEM USING DIFFERENTIAL REDUCTION MEMBER

KR102962303B1KR 102962303 B1KR102962303 B1KR 102962303B1KR-102962303-B1

Abstract

The present invention relates to a power-circulating load system comprising: an input drive unit that generates a rotational force having an input phase; an output drive unit that forms a power circulation path with the input drive unit and generates a rotational force having an output phase; a target support unit provided between the input drive unit and the output drive unit to support a test target so that a load torque based on a phase difference between the input phase and the output phase is applied; a phase adjustment unit that generates a variable phase by having a differential reduction member that maintains a preload through elastic deformation and multi-point simultaneous meshing, axially coupled between the output drive unit and the target support unit; and a control unit that controls the phase adjustment unit so that the phase difference is adjusted to a target phase difference set for the test target according to the variable phase. According to this, by applying an accurate load torque through precise control of the phase difference using a differential reduction member, the reliability of performance evaluation for the test target can be improved, and efficiency and eco-friendliness can be improved by configuring a compact power circulation path with only a few parts.

Inventors

  • 이정기
  • 김성연

Dates

Publication Date
20260508
Application Date
20251114
Priority Date
20250624

Claims (5)

  1. In a power circulating load system, Input drive unit that generates rotational force having an input phase; An output drive unit that forms a power circulation path with the above-mentioned input drive unit and generates a rotational force having an output phase; A target support member provided between the input driving unit and the output driving unit, supporting the test target so that a load torque based on the phase difference between the input phase and the output phase is applied; A phase adjustment unit having a differential reduction member axially coupled between the output drive unit and the target support unit to maintain a preload through elastic deformation and multi-point simultaneous meshing, and generating a variable phase that varies the output phase from the differential reduction member; and A power circulation type load system comprising a control unit that controls the phase adjustment unit so that the above phase difference is adjusted to a target phase difference set for the test subject.
  2. In paragraph 1, The above differential reduction member is, Elliptical rotary driver; A deformation spline that is cylindrically coupled to the outer circumference of the rotary drive and elastically deformed and has a tooth profile on its outer surface; and A power circulation type load system comprising a shaped spline having a predetermined number of teeth on its inner surface in a cylindrical shape greater than that of the deformed spline, and simultaneously meshing at multiple points in the diameter direction with the deformed spline, and maintaining the preload by rotating relatively so that the meshing position moves in the circumferential direction.
  3. In paragraph 2, The above-mentioned shaped spline includes a first shaped spline, and The above differential reduction member further includes a second regular spline having a tooth profile on its inner circumference in a cylindrical shape, the same as the deformation spline, and A power circulation type load system in which one of the first shaped spline and the second shaped spline is connected to the power circulation connection on the input drive side and the other is connected to the rotation shaft on the target support side, and the rotational driveer receives rotational force from the rotation shaft on the output drive side and rotates.
  4. In paragraph 3, It further includes a phase measuring unit that measures the phase of at least two positions among the input driving unit, the output driving unit, and the target support unit, and The above control unit is a power circulation type load system that transmits a control signal, in which a zero (0) mean micromodulation signal is superimposed on a basic phase control signal, to the rotary driver when the phase difference enters within a predetermined proximity range of the target phase difference based on the measured phase.
  5. In paragraph 4, The above control unit determines whether the time discrepancy between the phases of at least two positions exceeds a predetermined allowable range, and if it exceeds it, synchronizes and complements the phases with a common time reference, and performs adjustment of the phase difference based on the synchronized and complemented phases, in a power circulating load system.

Description

Power circulation load system using a differential reduction member {POWER CIRCULATION LOAD SYSTEM USING DIFFERENTIAL REDUCTION MEMBER} The present invention relates to a power circulating load system that applies a load by configuring a circulating power path to evaluate the performance of a test subject using circulating power. The power circulating load system is a system for evaluating the performance of a test subject by applying a load torque to the test subject. It is characterized by the fact that a closed circuit is configured to evaluate performance by applying a load torque generated by a drive unit as an input to the test subject, and then reapplying the remaining load torque to the input of the test subject using a circulating gear or the like after the performance evaluation. In a conventional load system, the remaining load torque is lost, so it is necessary to supplement the load torque from an external drive unit. However, in the power circulating system, the intervention of such an external drive unit can be excluded or minimized, and even if the capacity of the drive unit is small, a large load torque can be applied, so it has the advantage of being more efficient than a conventional load system. Recently, there has been an increasing demand to evaluate the performance of test subjects more accurately, even in power-circulating load systems. To achieve this, technology is required to precisely control the phase difference between the input and output of the test subject; as an example, a technique has been introduced to attempt precise control by complexly connecting multiple gears. However, according to this conventional technology, it may be difficult to precisely control the phase difference due to vibration, friction, and noise caused by mechanical play between multiple gears. If the phase difference is not precisely controlled, the reliability of performance evaluation may be reduced as the desired load torque cannot be accurately applied. Furthermore, using multiple gears leads to the enlargement of equipment and increased electricity consumption amidst the trend of increasing load torque to respond to various operating environments of test subjects, thereby undermining the efficiency that is an advantage of power-circulating load systems and becoming a problem that does not meet the recently strengthened standards of eco-friendliness. FIG. 1 illustrates a power circulating load system according to one embodiment of the present invention. FIG. 2 is an exploded view of the differential reduction member of FIG. 1 including a deformed spline and a shaped spline. Figure 3 is an assembly diagram of the differential reduction member of Figure 2. FIG. 4 is an exploded view of a cyclic differential reduction member including a deformation spline, a first regular spline, and a second regular spline. Figure 5 is an assembly diagram of the circulating differential deceleration member of Figure 4. Preferred embodiments of the present invention will be described in detail below with reference to the drawings. This description is intended to be detailed enough for a person skilled in the art to easily practice the invention, and it should be noted that the technical scope and concept of the present invention are not limited thereby. FIG. 1 illustrates a power circulating load system (1) according to one embodiment of the present invention. The power circulating load system (1) is a device for evaluating the performance of a test subject (3). The test subject (3) may include various power transmission devices such as a gearbox, transmission, clutch, powertrain, pump, compressor, etc. The power circulating load system (1) can evaluate dynamic performance such as efficiency and responsiveness, and static performance such as durability and reliability of such power transmission devices. Below, each component of the power circulating load system (1) will be described in detail with reference to FIG. 1. The power circulating load system (1) includes an input drive unit (10), an output drive unit (20), a target support unit (30), a phase adjustment unit (40), and a control unit (2). The input drive unit (10) generates a rotational force having an input phase. For example, the input drive unit (10) may have an input rotation axis capable of generating an input phase. The input phase may be defined as an angle measured as the input rotation axis of the input drive unit (10) rotates. The output drive unit (20) forms a power circulation path with the input drive unit (10) and generates a rotational force having an output phase. For example, the output drive unit (20) may have an output rotation axis capable of generating an output phase. The output phase may be defined as an angle measured as the output rotation axis of the output drive unit (20) rotates. The input drive unit (10) can be implemented with a motor, servo motor, stepper motor, encoder, etc., which can apply an input load torque by rotating an