Rescue Tool Spindle Drive for High Force in a Compact Form
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Solution Overview
Problem
Existing rescue tools with hydraulically driven cylinder-piston rods and planetary roller mechanisms are complex, heavy, and bulky, making them difficult to manage and maneuver in emergency situations, despite providing sufficient force for actuating implements.
Innovation Solution
A rescue tool design that couples the rotation shaft of a drive source to an axially rotatable spindle via an axial bearing assembly, where a linearly movable drive body converts the spindle's axial rotation to linear translation, allowing for a more compact and lightweight construction while maintaining high force actuation capabilities, using a planetary roller mechanism and screw threads for efficient force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a complex mechanical transmission system with planetary roller mechanism is used to transmit drive force, then sufficient actuation force can be achieved, but the tool becomes heavier and more bulky
Solution Approach 1:
The patent replaces the complex mechanical planetary roller transmission system with a direct drive configuration where the drive source (electric motor) is coupled directly to the spindle. This eliminates the intermediate planetary roller mechanism, significantly reducing weight and complexity while maintaining sufficient actuation force through direct force transmission from the drive source to the spindle.
Solution Approach 2:
The invention extracts and removes the planetary roller transmission mechanism from the drive system, keeping only the essential components (drive source, spindle, and bearing assembly). This extraction eliminates unnecessary mechanical complexity and weight while preserving the core functionality of force transmission.
2Force
If a complex mechanical transmission system with planetary roller mechanism is used, then sufficient actuation force can be achieved, but the tool dimensions increase
Solution Approach 1:
The patent substitutes the bulky planetary roller transmission mechanism with a compact direct drive system. The drive source is directly coupled to the spindle through a simple bearing assembly, eliminating the need for complex transmission components and reducing the overall tool dimensions while maintaining sufficient actuation force.
Solution Approach 2:
The invention extracts the planetary roller transmission mechanism from the system, removing the source of bulk and complexity. The remaining direct drive configuration occupies significantly less space while achieving the same force transmission capability.
3Force
If a complex mechanical transmission system is used, then sufficient actuation force can be achieved, but the device complexity increases
Solution Approach 1:
The patent replaces the complex mechanical transmission system with a direct drive configuration. The drive source is directly coupled to the spindle without intermediate transmission mechanisms, significantly simplifying the device architecture while maintaining sufficient actuation force through direct force transmission.
Solution Approach 2:
The invention extracts and removes the planetary roller transmission mechanism, eliminating the source of device complexity. The simplified direct drive system consists of only essential components (drive source, spindle, and bearing assembly), making the overall device much easier to understand, maintain, and operate.
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 manageability and reduces the tool's dimensions without compromising performance, enabling effective deployment with high force and flexibility in emergency situations.
Implementation Method 1
the spindle is coupled rotatably to the housing by means of an axial bearing assembly
Implementation Method 2
a linearly movable drive body is coupled for force transmission to the spindle and is configured and suitable for converting an axial rotation of the spindle to a linear translation of the drive body
Implementation Method 3
using a planetary roller mechanism and screw threads for efficient force transmission
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A rescue tool (10) comprises a drive system which is provided inside a housing and which is configured and suitable for actuating a linear displacement of an implement drive member. The drive system is connected for axial rotation to a rotation shaft of an energizable drive source (22), wherein the rotation shaft of the energizable drive source (22) is coupled for force transmission to an axially rotatable spindle (30). The spindle (30) is coupled rotatably to the housing (15) by means of an axial bearing assembly (25, 26) and the drive body (40) is coupled for force transmission to the spindle (30) and to the implement drive member. The drive body is configured and suitable for converting an axial rotation of the spindle (30) to a linear translation of its own.