Dual Drawbar Spindle Clamping with One Actuator
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Solution Overview
Problem
The existing spindle devices require multiple cylinder devices for clamping two clamped parts, leading to increased size, weight, cost, and operational complexity.
Innovation Solution
A spindle device with a first and second draw bar, each with a clamping mechanism, arranged in series and activated by a single pushing means, utilizing biasing forces for clamping and unclamping, reducing the need for multiple cylinder devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two cylinder devices are arranged separately on the spindle device to clamp the two clamped parts, then the clamping function is achieved, but the size and weight of the spindle device increase
Solution Approach 1:
The patent combines two separate cylinder devices into a single cylinder device that operates both the first and second draw bars. The first draw bar has a first clamping mechanism for the first clamped part, and the second draw bar has a second clamping mechanism for the second clamped part. Both are actuated by the same cylinder device through a shared piston rod, merging the functions of two separate actuation systems into one unified system.
Solution Approach 2:
The single cylinder device performs multiple functions by actuating both the first draw bar and the second draw bar. The piston rod of the cylinder device is configured to push both draw bars simultaneously, enabling one actuator to control multiple clamping operations, thereby reducing the overall number of components and reducing weight.
2Adaptability or versatility
If two cylinder devices are arranged separately on the spindle device to clamp the two clamped parts, then the clamping function is achieved, but the cost increases
Solution Approach 1:
The patent combines two separate cylinder devices into a single cylinder device that operates both the first and second draw bars. The first draw bar has a first clamping mechanism for the first clamped part, and the second draw bar has a second clamping mechanism for the second clamped part. Both are actuated by the same cylinder device through a shared piston rod, merging the functions of two separate actuation systems into one unified system.
3Adaptability or versatility
If two cylinder devices are arranged separately on the spindle device to clamp the two clamped parts, then the clamping function is achieved, but the operational complexity increases
Solution Approach 1:
The patent combines two separate cylinder devices into a single cylinder device that operates both the first and second draw bars. The first draw bar has a first clamping mechanism for the first clamped part, and the second draw bar has a second clamping mechanism for the second clamped part. Both are actuated by the same cylinder device through a shared piston rod, merging the functions of two separate actuation systems into one unified system.
4Adaptability or versatility
If two cylinder devices are arranged separately on the spindle device to clamp the two clamped parts, then the clamping function is achieved, but the maintenance complexity increases
Solution Approach 1:
The patent combines two separate cylinder devices into a single cylinder device that operates both the first and second draw bars. The first draw bar has a first clamping mechanism for the first clamped part, and the second draw bar has a second clamping mechanism for the second clamped part. Both are actuated by the same cylinder device through a shared piston rod, merging the functions of two separate actuation systems into one unified system.
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 simplifies the clamping mechanism, reduces the size and cost of the spindle device, and minimizes energy loss and rotation unevenness.
Implementation Method 1
a first biasing means for biasing the first draw bar in a retreating direction; and a second biasing means for biasing the second draw bar in a retreating direction
Data Source
AI summary
[Object] To provide a spindle device capable of clamping two positions at the inside and the outside of a multifunctional holder with one driving means, a machine tool having the spindle device mounted thereon, and the like.[Solution Means] In a spindle device to be used by mounting a holder having a first clamped part and a second clamped part arranged doubly on a spindle leading end, a first draw bar 8 and a second draw bar 9 overlap each other and are arranged in series in a spindle cylinder. As the first draw bar 8 is pushed and advanced by a striking metal 17, the first draw bar 8 is advanced against a biasing force of a first disc spring assembly 10 and a first clamping mechanism is released, and along with this, the second draw bar 7 is also advanced against a biasing force of a second disc spring assembly 11, and a second clamping mechanism is also released. As the striking metal 17 is retreated, the first and second clamping mechanisms of the first and second draw bars 8 and 9 are activated by the biasing forces of the first and second disc spring assemblies 10 and 11.