Integral Hammer Bearing Assembly for Precise Sowing Disc Preload
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Solution Overview
Problem
Current assembly methods for sowing discs in seeding machines lack guaranteed correct assembly and radial-axial play, leading to potential failures and reduced useful life due to incorrect retainer assembly and contamination risks.
Innovation Solution
The integral hammer features machined tracks within its body to precisely adjust axial play, incorporating pre-assembled and sealed conical rollers, eliminating the need for user-adjustment and providing a maintenance-free, shielded unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate bearings and retainers are assembled on the hammer body, then the assembly process allows flexibility, but the correct assembly and radial-axial play cannot be guaranteed
Solution Approach 1:
The patent merges the bearing, retainer, and hammer body into a single integrated component. The bearing is directly mounted on the hammer body with machined tracks, eliminating the separate retainer assembly step. This integration ensures correct radial-axial play is guaranteed by the precision machining of the hammer body tracks, while reducing assembly complexity by removing the need for separate retainer installation and adjustment.
2Reliability
If open bearing assembly is used, then assembly is simpler, but contamination risks increase and service life decreases
Solution Approach 1:
The patent implements a sealed bearing assembly where the bearing is enclosed within a shielded structure integrated with the hammer body. The machined tracks in the hammer body form a protective enclosure that prevents contamination from entering the bearing, while the integrated design ensures the shielding is robust and maintenance-free. This sealed configuration significantly extends service life by protecting the bearing from environmental contaminants.
3Ease of operation
If user adjustment of axial play is required, then adaptability is improved, but assembly time and potential for error increase
Solution Approach 1:
The patent incorporates pre-adjusted axial play directly into the hammer body design through precision machining of the bearing tracks. The correct radial-axial play is built-in during manufacturing, eliminating the need for user adjustment during assembly. This preliminary action ensures correct assembly every time while significantly reducing assembly time and eliminating the potential for user error in adjustment.
4Strength
If double row conical rollers are assembled separately, then load capacity can be optimized, but assembly precision and stability are compromised
Solution Approach 1:
The patent integrates the double row conical roller bearing assembly directly into the hammer body with precision-machined tracks. The hammer body is machined to provide exact radial-axial play for both rows of conical rollers, ensuring perfect alignment and optimal load capacity. This integration allows the use of high-capacity double row conical rollers while guaranteeing correct assembly precision that cannot be achieved with separate assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances load capacity, service life, and simplifies assembly by ensuring precise axial play adjustment, resulting in a longer-lasting and easier-to-assemble sowing disc assembly system.
Implementation Method 1
whose configuration allows the use of a double row of conical rollers, which provides greater stability due to the angular contact that occurs when they are assembled back-to-back
Implementation Method 2
the conical rollers are already assembled and shielded by means of specific seals, thus constituting a shielded unit that already includes the quantity and type of grease suitable for the application
Implementation Method 3
the mounting of the set is optimized and its replacement is facilitated. It also has a greater load capacity because its configuration allows the use of a double row of conical rollers
Data Source
AI summary
An integral hammer (M) designed for the assembly of a sowing disc (D) which is fixed with the bolts (22) and nuts (23) is described. It stands out due to the fact that it includes machining on its internal face of a first raceway (10) and a second raceway (11) for the direct assembly of a first conical roller (12) and a second conical roller (13), thus eliminating the need to incorporate the cups that make up conventional bearings from the outset. For the assembly of said first conical roller (12) and second conical roller (13), the first internal cone (14) and a second internal cone (15) that define the inner bearing rings are used. In this way, the integral hammer works as a single unit that includes the aforementioned first internal cone (14) and a second internal cone (15) with their respective first cage (16) and second cage (17) constituting the hammer-bearing set.