Self-Locking Linear Actuator Assembling Mechanism
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Solution Overview
Problem
Conventional linear actuator assembling mechanisms face issues with insufficient strength in the rear retainer seat, complex manufacturing processes, and high costs due to the use of additional fixing members and ultrasonic fusion challenges.
Innovation Solution
The proposed assembling mechanism features a one-piece rear retainer seat with a regular polygonal shape, parallel mating faces in the casing halves for improved alignment during ultrasonic fusion, and an insertion section with engaging bosses and holes for simplified connection without additional fixing members, reducing component count and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the rear retainer seat is composed of two pieces to facilitate assembly, then the assembly process is simplified, but the connection strength is insufficient leading to component damage
Solution Approach 1:
The patent merges the two-piece rear retainer seat into a single integrated component. The rear retainer seat now includes a body portion and a connection portion formed as one piece, eliminating the joint between separate components. This integration maintains assembly simplicity while significantly improving connection strength to prevent component damage during operation.
2Ease of manufacture
If the casing is composed of two half casings connected by ultrasonic fusion, then the manufacturing flexibility is improved, but the connection reliability is affected due to difficulty in keeping halves tightly attached
Solution Approach 1:
The patent designs the mating faces of the two half casings to be parallel to each other, creating an equipotential configuration where gravity acts uniformly on both halves. This parallel arrangement ensures that during ultrasonic fusion, both half casings remain tightly attached without requiring complex positioning mechanisms, thereby improving connection reliability while maintaining manufacturing flexibility.
3Reliability
If an additional clamp is used to connect the gearbox to the outer tube, then the connection is secured, but the device complexity increases and manufacturing cost rises
Solution Approach 1:
The patent integrates the connection function directly into the gearbox structure by forming a connection portion that extends from the gearbox body. This connection portion engages directly with the outer tube through complementary engagement structures, eliminating the need for separate clamps or additional fixing members. The integration maintains secure connection while reducing component count and manufacturing complexity.
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
This solution enhances connection strength, prolongs the linear actuator's lifetime, simplifies the manufacturing process, and reduces costs by ensuring reliable ultrasonic fusion and eliminating the need for extra fixing components.
Implementation Method 1
when the two half casings are connected by means of ultrasonic fusion
Data Source
AI summary
An assembling mechanism of a self-locking linear actuator includes a gearbox, a one-piece rear retainer seat and a casing. The gearbox is composed of two half pieces, which are mated with each other for accommodating and locating a transmission mechanism of the actuator. The rear retainer seat is fixedly held in the gearbox for supporting a bearing of a threaded rod of the transmission mechanism and bearing the stress from the threaded rod. The contact faces of the rear retainer seat and the gearbox are regular polygonal to facilitate adjustment of fixing angle of the rear retainer seat. The casing is composed of two half casings, which are mated with each other to accommodate the transmission mechanism, the gearbox and the rear retainer seat. The mating faces of the half casings are parallel to the axis of the output shaft of a motor to facilitate connection operation of the casing.