Movable Front Mower Transmission for Tractor Terrain Adaptation
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Solution Overview
Problem
Existing front mower groups for tractors face challenges when navigating uneven terrain or obstacles, as the rigid central transmission limits movement, causing the mower to scrape the ground during uphill climbs and forcing it further into obstacles, while also increasing frictional resistance, and fails to react properly during downhill slopes.
Innovation Solution
The improved front mower group features a movable connection system between the support frame and upper frame, allowing the mower to perform backward movements during uphill climbs and forward movements during downhill slopes, with a telescopic Cardan shaft and transverse shaft arrangement that prevents excessive weight on the ground, utilizing articulated quadrilaterals and lightening springs to manage weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the central transmission is rigidly fixed to the lower frame, then the power transmission is stable and efficient, but the mower is forced to move forward during uphill climbs causing ground scraping and increased friction
Solution Approach 1:
The patent applies the dynamics principle by making the central transmission movable relative to the lower frame through a guide mechanism. The transmission can now move backward during uphill climbs and forward during downhill slopes, transforming from a static rigid connection to a dynamic adaptable system. This resolves the contradiction by allowing the transmission to move independently to prevent ground scraping while maintaining stable power transmission through the guide mechanism.
Solution Approach 2:
The patent segments the coupling between the central transmission and the lower frame by introducing a guide mechanism that allows relative movement. Instead of a single rigid connection, the system is divided into the transmission unit and the frame unit, connected through guides that permit controlled displacement. This segmentation enables the transmission to move backward during uphill operation, preventing ground scraping while maintaining power transmission efficiency.
2Device complexity
If the mower is forced to carry out circumferential arcs to maintain constant Cardan shaft length, then the transmission structure remains simple, but the mower is forced further into obstacles during uphill climbs
Solution Approach 1:
The patent applies dynamics by allowing the central transmission to move backward on the lower frame during uphill climbs through the guide mechanism. This eliminates the need for circumferential arc movements and prevents the mower from being forced into obstacles. The transmission can now react dynamically to terrain changes, improving reliability while maintaining relatively simple structure through the guide-based movement control.
3Weight of moving object
If the mower is kept light through springs to reduce ground bearing, then the cutting performance is improved, but the mower becomes unstable on uneven ground
Solution Approach 1:
The patent applies dynamics by enabling the central transmission to move independently on the lower frame during uphill and downhill operations. This dynamic capability allows the mower to maintain light weight for better cutting performance while the transmission's independent movement compensates for stability issues on uneven ground. The guide mechanism ensures controlled movement that maintains overall system stability.
Data Source
AI summary
Front mower group (10) for tractors comprising a support frame (11), a mower (12) connected below said support frame (11), an angle transmission (13) of the motion coming from a Cardan shaft (14) connected to a front power drive (16) of a tractor (15), a transverse shaft (17) connected at one end to said angle transmission (13) and at another end to a lateral transmission case (18) connected to the side of said mower (12), said mower group (10) moreover comprising an upper frame (19) connectable at its rear portion to a three-point attachment (20) of said tractor (15), said support frame (11) being connected at its upper part, in a movable manner, to said upper frame (19) integral with said tractor (15) by means of movable connection means (30, 31, 32), characterised in that said angle transmission (13) is connected at the rear to a movable support (21), hinged to said upper frame (19), and is frontally hinged to a first end (24) of connecting rod element (22), said connecting rod element (22) comprising a second end (25) hinged to a portion (23) projecting on the upper part of said support frame (11).