Adaptive balancing mechanism of dual-head cement trowelling machine

Patent metadata

Field	Value
Publication number	US-11261570-B2
Application number	US-202016973776-A
Country	US
Kind code	B2
Filing date	Apr 10, 2020
Priority date	May 22, 2019
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

An adaptive balancing mechanism of dual-head cement trowelling machine includes a water tank, a screw support base, an adjusting screw, a sensor and controller, a counterweight, a stepper motor, an underframe, a guide rail, a guide rail support plate, limit plates, and a transmission member. The controller collects the weight change information of the water in the water tank in real time according to the operation process. Adjust the position of the counterweight in real time by the stepper motor and the adjusting screw to make the two trowel heads in adaptive dynamic balance to the ground pressure.

First claim

What is claimed is:

1. An adaptive balancing mechanism, adapted for a dual-head cement trowelling machine, the adaptive balancing mechanism comprising a water tank, a guide rail, a screw support base, an adjustment screw, a sensor and a controller, a counterweight, a coupling, a stepper motor, an engine, an underframe, a transmission member, a guide rail support plate, a transmission shaft and a water pipe, wherein the adjusting screw has an end near the engine connected to the stepper motor through the coupling, and the adjusting screw is provided with the counterweight and the screw support base at both ends;
the counterweight is adjusted by the sensor and the controller, and the stepper motor to balance a mechanism of the dual-head cement trowelling machine in real time; two ends of the underframe are fixedly mounted with two trowel power shafts, a trowel disc is installed below each of the trowel power shafts, and a flexible shock absorber is mounted above each of the trowel power shafts and has an upper plate; inner sides of the upper plates of the flexible shock absorbers are respectively fixed to two ends of the guide rail by bolts, the water tank and the engine are respectively installed above the flexible shock absorbers; the two trowel discs are configured to trowel a ground and support a frame of the trowelling machine; the transmission shaft is configured to transmit power of the engine to one of the trowel discs for operation, and transmit the power to the other one of the trowel discs through the transmission member for operation.

2. The adaptive balancing mechanism according to claim 1 , wherein the guide rail includes a guide rail main body and a guide rail side plate, and a middle portion of the guide rail is connected to an upper end of a support plate of the guide rail support plate through a hinge.

3. The adaptive balancing mechanism according to claim 1 , wherein the counterweight includes a weight block body and a weight block slide plate, the weight block slide plate cooperates with an upper part of the guide rail side plate of the guide rail, so that the counterweight maintains a stable attitude and forms a longitudinal straight linear movement along the adjustment screw.

4. The adaptive balancing mechanism according to claim 1 , wherein each of the flexible shock absorbers includes the upper plate, a shock absorbing element, and a lower plate; a material of the shock-absorbing element includes rubber and spring.

5. The adaptive balancing mechanism according to claim 1 , wherein the guide rail support plate includes a first limit, the support plate, and a second limit; first limit plate and the second limit plate are connected to the underframe by bolts and is symmetrically arranged on both sides of the support plate, and a lower end of the support plate is connected to the underframe by a bolt; the second limit plate ensures that the water tank and the engine installed on the flexible shock absorber is adjustable within a safe height range.

6. The adaptive balancing mechanism according to claim 1 , wherein the flexible shock absorber and the underframe is able to reduce a vibration of the engine, the transmission component and other external parts.

7. The adaptive balancing mechanism according to claim 1 , wherein the stepper motor of the counterweight for real-time adjusting is replaceable by other power including a hydraulic motor.

8. The adaptive balancing mechanism according to claim 1 , further comprising a detection sensor, wherein the detection sensor includes a gyroscope, a water level sensor or a water pressure sensor, and the screw support base includes a pair of the screw support bases.

9. An adjusting method of the adaptive balancing mechanism of the dual-head cement trowelling machine according to claim 1 , the adjusting method comprising:
a) filling water into the water tank, wherein a weight of the water tank gradually decreases with continuous use of the water in the water tank during operation of the dual-head cement trowelling machine;
b) a weight change of the water tank causes the guide rail to incline, sending an angle change signal detected by the sensor and controller of a trowelling mechanism of the dual-head cement trowelling machine to a controller for processing and sending a message to control the stepper motor, driving a ball screw by the coupling to adjust a position of the counterweight, and performing adaptive balance adjustment by the trowelling mechanism; and
c) as the position of the counterweight, an inclination angle of trowelling mechanism, which is an inclination angle of the guide rail, gradually decreases, until the guide rail is in a horizontal position, stopping the stepper motor by the sensor and controller, and completing the adaptive balance adjustment of the trowelling mechanism.

Assignees

• Univ Jiangsu

Inventors

• Dong Lili
• Yao Jun
• Miao Zeyuan
• Niu Xiaotie
• Zou Lan

Classifications

• E01C19/42 Primary

  Machines for imparting a smooth finish to freshly-laid paving courses other than by rolling, tamping or vibrating (for distributing only E01C19/12; {hand-actuated smoothing tools E01C19/44}) · CPC title

• E04F21/245 Primary

  Rotary power trowels, i.e. helicopter trowels · CPC title