Cam Machine Adjustment Mechanism for Wear Reduction
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Solution Overview
Problem
Existing cam mechanisms face issues with mechanical wear due to friction and periodic contact interruptions, and the adjusting mechanism is cumbersome with difficult access to position nuts and excessive inertial forces leading to increased wear.
Innovation Solution
A cam machine design with a 3D cylindrical tubular cam and asynchronously moving followers, featuring tubular main bearing journals with threaded holes for screw regulators and indirect/direct contact through elastic elements and pins, allowing for simplified adjustment and reduced wear by minimizing additional roller displacement and facilitating easy assembly/disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If position nuts are used to adjust additional rollers in the cam mechanism, then the contact between additional rollers and cam profiles is maintained, but the access to position nuts becomes difficult as they are located inside the compound cam
Solution Approach 1:
The patent extracts the adjustment mechanism from the interior of the compound cam by providing access holes in the compound cam body. These access holes allow the position nuts to be reached and adjusted from the exterior, eliminating the need to disassemble the entire cam mechanism to perform adjustment operations.
Solution Approach 2:
The access holes act as intermediaries that bridge the gap between the exterior adjustment tools and the interior position nuts. Through these holes, adjustment tools can be inserted to engage with the position nuts, enabling remote adjustment without direct contact with the interior components.
2Stability of the object's composition
If two-way restriction is imposed on plungers through bilateral contact with position nuts, then the plunger movement is controlled, but the mechanism complexity increases and weight of followers increases
Solution Approach 1:
The patent segments the plunger movement control into two independent one-way restrictions. Instead of using bilateral contact with position nuts to achieve two-way restriction, the design uses two separate one-way bearing contacts that each handle movement in one direction, simplifying the overall mechanism.
Solution Approach 2:
The patent inverts the conventional approach by using one-way bearings instead of two-way bearings. The one-way bearings allow movement in the permitted direction while preventing movement in the opposite direction, achieving the same functional result with simpler components.
3Stability of the object's composition
If position nuts are used to restrict plunger movement, then the plunger is controlled in both directions, but inertial forces increase due to additional bearing elements
Solution Approach 1:
The patent segments the bidirectional control into two independent unidirectional controls using one-way bearings. This segmentation reduces the number of bearing elements and their associated inertial forces while maintaining the ability to control plunger movement in both directions through the combined action of the two one-way bearings.
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
The design enhances contact between cam profiles and followers, reducing wear and extending service life, while simplifying the adjustment process and reducing inertial forces, thus improving the operational reliability and longevity of the cam machine.
Implementation Method 1
The indirect contact between the plungers and the adjacent screw regulators is made through elastic and bearing elements
Implementation Method 2
The connections between the pistons and the cam are made by two V-shaped followers, which are in contact with the cam profiles of the channel by means of main bearing rollers. The main bearing rollers reduce friction and wear of the cam profile, respectively.
Implementation Method 3
The tubular main bearing journals have threaded holes in which screw regulators are mounted, contacting indirectly or directly with the plungers
Implementation Method 4
The auxiliary rollers are elastically connected to their respective follower so that each auxiliary roller can be moved in the direction of the axis of its respective main roller
Data Source
Figure 1
Figure 2a
Figure 2b~2d
AI summary
(57) The invention relates to a cam machine with a control mechanism which will find application in various fields of mechanical engineering, such as compressor machines, hydraulic pumps, internal combustion engines and other types of engines in various land, sea and air vehicles, or in stationary units. The created cam machine improves the contact between the cam profiles (15a, 15b) of the cam bushings (16a, 16b) and the followers (la, lb). The main improvement of the machine is in the design of the regulating mechanism, which increases the reliability and the service life of the cam machine. In addition, simple and reliable control mechanisms are integrated in the machine, which at the same time simplifies the process of adjusting the cam machines.