Ball Screw Nut Sensor Layout That Preserves Stroke and Ball Circulation
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Solution Overview
Problem
Existing linear transmission devices with sensors protruding from moving members affect surrounding space configurations and compromise the structural rigidity and movement of balls within the nut, leading to inaccurate monitoring and potential damage.
Innovation Solution
A linear transmission device design where a sensor is embedded in a receiving groove within the moving member, connected to an ineffective thread section, allowing it to sense temperature, vibration, or torque without protruding, thus maintaining structural integrity and ball movement, and enabling accurate monitoring without affecting surrounding space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is attached to the moving member (nut or slider), then the sensor can sense temperature, vibration or torque during operation, but the sensor protrudes out of the moving member which affects the configuration of surrounding mechanisms and the stroke of the moving member
Solution Approach 1:
The sensor is embedded within a receiving groove formed on the moving member, nesting the sensor inside the moving member's structure rather than having it protrude outward. This allows the sensor to be housed within the existing volume of the moving member, eliminating the need for additional external space while maintaining monitoring capabilities.
2Ease of manufacture
If the sensor protrudes from the axial end surface of the nut, then the sensor can be installed and connected, but the stroke of the nut is affected
Solution Approach 1:
The receiving groove is formed on the axial end surface of the moving member, allowing the sensor to be embedded within this groove rather than protruding from it. This nesting approach ensures that the sensor does not extend beyond the moving member's boundaries, thereby preserving the full stroke range of the moving member during operation.
3Measurement precision
If the temperature sensor is inserted into the nut obliquely from one end surface, then the sensor can sense temperature change, but the sensor extends into the effective thread section which damages structural rigidity and affects ball movement
Solution Approach 1:
The receiving groove is specifically positioned on the axial end surface of the moving member, utilizing the ineffective thread section area that does not participate in load transmission. This localized placement allows the sensor to be embedded without interfering with the effective thread section where balls pass, thereby maintaining the structural rigidity and mechanical function of the nut while enabling temperature monitoring.
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 embedded sensor configuration prevents interference with the surrounding space and ball movement, allowing for precise monitoring while maintaining the structural rigidity of the moving member, enabling accurate and unobtrusive operation.
Implementation Method 1
The sensor is set in the receiving groove of the moving member for sensing the temperature, vibration, or torque of the moving member during operation
Implementation Method 2
The sensor is set in the receiving groove of the moving member for sensing the temperature, vibration, or torque of the moving member during operation
Implementation Method 3
The sensor is set in the receiving groove of the moving member for sensing the temperature, vibration, or torque of the moving member during operation
Data Source
AI summary
A linear transmission device includes a screw, a moving member, a return element, and a sensor. The moving member is set in the screw to form a load path therebetween. The return element is set in the moving member and has a return path connected to the load path. The return path and the load path constitute a circulating path for balls to run. The moving member has an internal thread with an ineffective thread section. The moving member has a receiving groove adjacent to the ineffective thread section. The sensor is embedded in the receiving groove of the moving member without affecting the operation of the balls. Thus, the linear transmission device of the present invention can solve the problem of the sensor protruding from the moving member, so that the configuration of the surrounding space and the stroke of the moving member will not be affected.