Motor Grader Ripper Cylinder Alignment for Force Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ripper devices for motor graders face inefficiencies in force transmission and balance issues due to suboptimal actuator placement and linkage configurations, leading to reduced ripping force and potential imbalances during operation.
Innovation Solution
A ripper device with a four-link structure, utilizing a single ripper cylinder connected to a ripper bracket, frame component, and tooth brackets, where the cylinder's expansion and contraction direction aligns with the diagonal line of the parallelogram, ensuring efficient force transmission and minimizing side imbalances, with improved manufacturing precision and reduced stress on the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the actuator is connected near the center of the frame member in the forward and backward direction, then the structure is simplified, but the force transmission efficiency is reduced because the expansion and contraction direction of the actuator does not coincide with the diagonal direction of the parallelogram shape of the four-link structure
Solution Approach 1:
The actuator connection point is moved from the center of the frame member to a position that aligns with the diagonal direction of the parallelogram four-link structure. This dimensional repositioning ensures that the actuator's expansion and contraction direction coincides with the diagonal direction, maximizing force transmission efficiency to the four-bar linkages.
2Force
If two ripper cylinders are disposed on left and right rotational shafts of the diagonal line in a pair of left and right four-bar linkages, then the ripping force is sufficient, but control becomes difficult due to synchronization requirements and left-right imbalance
Solution Approach 1:
Two separate ripper cylinders disposed on left and right rotational shafts are merged into a single ripper cylinder. This single cylinder is positioned to drive the four-link structure, eliminating the need for synchronization control between multiple cylinders and removing left-right imbalance issues while maintaining sufficient ripping force.
3Device complexity
If a single ripper cylinder is used with the rotational shaft shifted from the center, then the device complexity is reduced, but force transmission efficiency is reduced because the rotational shaft on the bottom side of the ripper cylinder and the rotational shaft of the four-link mechanism are shifted over
Solution Approach 1:
The single ripper cylinder is positioned with its rotational shaft aligned with the diagonal direction of the parallelogram four-link structure. This dimensional alignment ensures that the bottom side of the ripper cylinder's rotational shaft coincides with the rotational shaft of the four-link mechanism, maximizing force transmission efficiency while maintaining device simplicity.
Data Source
AI summary
A ripper device comprises a ripper bracket, a ripper cylinder, a frame component having a frame bracket, a pair of ripper links, a pair of tooth brackets, and a cylinder attachment bracket having a cylinder attachment axis. The frame bracket is connected in a state in which the head of the ripper cylinder is able to rotate, in the middle part near the ripper bracket. The cylinder attachment axis of the ripper cylinder is disposed coaxially with the rotational axis of the pair of ripper links and the pair of tooth brackets.