Torque Conversion Device with Dynamic Transmission Element
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Solution Overview
Problem
Existing devices that perform simultaneous rotary and linear movements during a periodic lifting movement face issues with unfavorable force effects and increased loading on guide contours due to the direction and force between the driven element and the guide element, leading to inefficient power transmission.
Innovation Solution
The introduction of a transmission element that is guided along the axis of rotation and is stationary during certain phases of the periodic lifting movement, providing additional guidance to the output element, thereby improving the force effect and guiding properties, especially at peak positions where power transmission is limited.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the output element is positively coupled to the guide element to achieve simultaneous rotary and linear stroke motion, then the conversion of linear stroke motion to rotary motion is achieved, but unfavorable force effects and increased stress occur at the vertex of the guide contour during periodic stroke reversals
Solution Approach 1:
A transmission element is introduced as an intermediary component between the output element and the guide element. This transmission element provides additional guidance during critical movement phases, mediating the force transmission and reducing unfavorable stress concentrations at the guide contour vertices while maintaining the rotary-linear motion conversion functionality.
2Productivity
If the output element is positively guided by the guide element through groove engagement or guide contours, then the conversion of linear motion to rotary motion is achieved, but force transmission becomes absent, limited, or unfavorable at apex points during periodic stroke reversals
Solution Approach 1:
The transmission element acts as a mediator that provides continuous guidance and force transmission support during periodic stroke reversals. By being held stationary to the guide element during specific movement phases, it ensures favorable force effects are maintained at apex points, preventing the loss or limitation of force transmission that occurs with direct positive coupling alone.
3Strength
If additional guidance is provided by holding the transmission element stationary to the guide element during the first movement phase, then favorable force effects are achieved, but the device complexity increases
Solution Approach 1:
The transmission element is designed with dynamic characteristics, being able to switch between being held stationary to the guide element during the first movement phase and moving along with the output element during the second movement phase. This dynamic behavior allows the system to provide favorable force effects only when needed, reducing unnecessary complexity while maintaining strength where required.
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
The invention relates to a device (100) for generating or converting torque, said device having a piston element (122), an output element (150) which can rotate about a rotational axis (D) with respect to the piston element (122), and a guide element (160) which guides the output element (150) in such a manner that said output element (150), when the device (100) is in operation, simultaneously carries out, when driving the output element (150), a rotational movement (T) about the rotational axis (D) and a linear movement in the form of a periodic lifting movement along the rotational axis (D) with respect to the piston element (122). Said device also comprises a transmission element (192a, 192b) which can be guided on the guide element (160) and moved along the rotational axis (D), said transmission element being placed in contact with the output element (150) and during a period of the periodic lifting movement of the output element is held stationary in a first movement phase with respect to the guide element (160) and in a second movement phase, is moved together with the output element along the rotational axis (D). As a result, a device for generating or converting torque, in which an advantageous dynamic effect between a guide element and the output element when carrying out a periodic lifting movement of the output element can be guaranteed, is provided.