Pumping Device Lever Flutter Prevention via Spindle Mediator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pumping devices experience lever fluttering during operation, which reduces operability and increases operation noise, affecting the marketability of the device.
Innovation Solution
A fluttering prevention apparatus for the lever of a pumping device, comprising a lever bracket with a hollow hole and insertion holes, a clutch cam with protruding portions, a clutch drum with a seat groove, and a spindle that inhibits the lever bracket from fluttering by transmitting torque through the clutch cam, clutch drum, and housing, with a stopper portion to prevent excessive rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clutch cam is rotated with respect to the clutch drum during lever operation, then the lever can be operated to adjust seat height, but the lever bracket and clutch cam flutter which reduces operability and increases noise
Solution Approach 1:
A spindle is introduced as an intermediary component between the clutch drum and clutch cam. The spindle penetrates through the clutch drum, clutch cam, and housing, and is coupled to the lever bracket's hollow hole. This intermediary structure transmits torque while preventing relative rotation and flutter between the clutch cam and clutch drum, thereby resolving the contradiction between operability and stability.
2Ease of operation
If the clutch cam is coupled to the lever bracket via coupling protrusions that protrude through the housing, then the lever bracket can be rotated, but the coupling structure allows fluttering during operation
Solution Approach 1:
The spindle acts as a mediator that replaces the unstable coupling protrusion structure. By penetrating through the clutch drum, clutch cam, and housing to couple with the lever bracket, the spindle provides a reliable torque transmission path that eliminates flutter while maintaining rotation capability.
Solution Approach 2:
The coupling structure is segmented into distinct functional parts: the spindle body that penetrates through components, the stopper portion that limits rotation, and the coupling holes in each component. This segmentation allows each part to perform its specific function while working together to prevent flutter.
3Ease of operation
If the lever bracket is elastically supported by the return spring, then the lever can return to initial position, but the elastic support allows side-to-side fluttering
Solution Approach 1:
The spindle serves as a stabilizing intermediary that works in conjunction with the return spring. While the return spring provides elastic support for the lever's return motion, the spindle penetrates through the lever bracket's hollow hole to prevent side-to-side fluttering, maintaining both the return function and positional stability.
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 effectively prevents lever fluttering, enhancing operability, reducing operation noise, and improving the marketability of the pumping device.
Implementation Method 1
the lever arm 102, which is provided in the lever bracket 100 and is bent in the axial direction, is elastically supported by the return spring 112 of the return spring guide 110 in the circumferential direction, such that when the lever bracket 100 is rotated in response to the lever handle operation by the user, the return spring 112 is compressed by the lever arm 102 of the lever bracket 100 and provides an elastic restoring force to the lever bracket 100
Implementation Method 2
a plurality of clutch rollers 136 provided between an outer circumferential surface of the clutch cam 134 and an inner circumferential surface of the clutch drum 132
Data Source
AI summary
A fluttering prevention apparatus for a lever of a pumping device includes: a lever bracket including a first side coupled with a lever, a center portion formed with a hollow hole, and a second side formed with insertion holes; a clutch cam including a first side provided with protruding portions inserted into the insertion holes of the lever bracket; a clutch drum having a first side formed with a seat groove to receive the clutch cam is seated therein; and a spindle coupled to the hollow hole of the lever bracket through center portions of the clutch drum, the clutch cam, and the housing, thereby inhibiting the lever bracket from fluttering with respect to the clutch drum.