Cam Device Gear Mechanism Transfer Stiffness
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Solution Overview
Problem
Cam devices experience a decrease in transfer stiffness due to the need for large power to rotate the cam, which affects the efficiency of driving force transmission.
Innovation Solution
Incorporating a gear that rotates the cam and providing teeth on the outer surface of the cam to mesh with the gear teeth, along with a servo motor to drive the cam, while ensuring the axial direction of the motor and cam axes align with the row direction and maintaining a longer distance from cam followers to the motor axis, allowing for higher transfer stiffness and flexible motor selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a large power is used to rotate the cam, then the cam can be rotated, but the transfer stiffness decreases
Solution Approach 1:
A gear is introduced as an intermediary component between the motor and the cam. The gear engages with teeth on the cam's outer surface, providing a mechanical advantage that reduces the power required to rotate the cam while maintaining high transfer stiffness through the meshing teeth connection.
2Device complexity
If the axial direction of the motor and cam axes are aligned with the row direction, then the structure is simplified, but the motor selection becomes limited
Solution Approach 1:
The gear mechanism allows the motor to be positioned at a distance from the cam axis along the row direction, adding spatial flexibility. This dimensional arrangement enables motor selection without compromising structural alignment, as the gear transmits torque over the distance.
3Adaptability or versatility
If the distance from cam followers to motor axis is increased, then larger motors can be used, but the structural compactness is reduced
Solution Approach 1:
The gear acts as a mediator that allows the motor to be positioned farther from the cam axis when larger motors are needed. The gear meshing with cam teeth provides efficient torque transmission over the increased distance, maintaining compactness relative to the functional requirements.
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 solution enhances transfer stiffness, reduces the power required to rotate the cam, and allows for the use of larger motors, thereby improving the efficiency and flexibility of the cam device.
Implementation Method 1
the second member includes a gear that rotates the cam by engaging with the cam, and second teeth that mesh with first teeth of the gear are provided on the outer circumferential surface of the cam
Data Source
AI summary
A cam device includes a first member including a plurality of cam followers arranged in a row direction and a second member including a rotatable cam with an engaging groove, on an outer circumferential surface thereof, to be engaged with the cam followers, the second member moving relatively with respect to the first member in the row direction by rotating the cam and making the plurality of the cam followers engage successively in the engaging groove, wherein the second member includes a gear that rotates the cam by engaging with the cam, and second teeth that mesh with first teeth of the gear are provided on the outer circumferential surface of the cam.