Bone Implant Drill with Intermediary Transmission Shaft
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Solution Overview
Problem
Conventional bone implant drills experience high temperatures due to friction, leading to potential osteonecrosis, poor operational continuity, and reduced service life, as well as elastic element deformation and wear, which can result in nasal membrane injuries.
Innovation Solution
A bone implant drill design featuring a sleeve, bearing, and elastic element configuration that prevents wear and deformation, maintaining elasticity and ensuring continuous operation by using a transmission shaft with coaxial bearings and a compression spring, which supports the elastic element and reduces frictional heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elastic element directly abuts the interior of the coupling seat and transmission seat to enable disengagement, then the safety mechanism functions to prevent nasal membrane injury, but friction generates high temperature causing osteonecrosis and elastic element wear
Solution Approach 1:
A transmission shaft is introduced as an intermediary component between the elastic element and the coupling seat. The transmission shaft includes a transmission member with teeth that mesh with the coupling seat, while the elastic element acts on the transmission shaft rather than directly on the coupling seat. This intermediary structure transmits the disengagement force while reducing direct friction and heat generation between the elastic element and the coupling seat.
2Reliability
If the elastic element directly disengages the transmission seat from the coupling seat, then the safety function is achieved, but the elastic element deforms and wears reducing service life
Solution Approach 1:
The transmission shaft serves as a mediator that distributes the mechanical stress and wear. Instead of the elastic element directly engaging and disengaging the coupling seat (causing concentrated wear), the force is transmitted through the transmission shaft's bearing and toothed structures, which are designed to handle such loads, thereby extending the service life of all components.
Solution Approach 2:
The transmission shaft is designed with rotational freedom, allowing it to dynamically adapt to the engagement and disengagement motions. The bearing within the transmission shaft enables smooth rotational movement, reducing friction and wear on the elastic element while maintaining the safety disengagement function.
3Productivity
If the cutter penetrates the cortical bone, then the drilling operation is completed, but the elastic element fails to disengage due to heat loss of elasticity causing nasal membrane injury
Solution Approach 1:
The transmission shaft with its bearing structure acts as a thermal and mechanical buffer. The bearing reduces frictional heat generation, and the transmission shaft's mass helps dissipate heat away from the elastic element. This intermediary structure protects the elastic element's elasticity from degradation due to excessive heat, ensuring reliable disengagement even after prolonged drilling operations.
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 reduces the risk of osteonecrosis, extends the drill's service life, and allows for continuous operation without nasal membrane injuries, enhancing drilling efficiency and safety.
Implementation Method 1
an elastic element (5), wherein a first end of the elastic element (5) is mounted around the coupling member (43) and abuts the positioning member (42), and a second end of the elastic element (5) is mounted around the transmission member (32) and abuts the bearing (2)
Implementation Method 2
A bearing (2) is received in the sleeve (1). The transmission shaft (3) extends through the bearing (2)
Implementation Method 3
a compression spring, which supports the elastic element and reduces frictional heat
Data Source
AI summary
A bone implant drill includes a bearing received in a sleeve. A transmission shaft includes a rod extending through the bearing and a transmission member formed on an end of the rod and received in the sleeve. The other end of the rod extends beyond the sleeve. A cutting rod includes a cutter, a coupling member received in the sleeve, and a positioning member between the cutter and the coupling member. The cutter and the coupling member are provided on two ends of the cutting rod respectively. The coupling member includes second teeth releasably engageable with first teeth on a free end of the transmission member. An elastic element is mounted in the sleeve. The elastic element includes a first end mounted around the coupling member and abutting the positioning member. The elastic element further includes a second end mounted around the transmission member and abutting the bearing.