Excavator Compactor Bolt Securing Mechanism
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Solution Overview
Problem
Existing add-on compactors for excavators have high acquisition and operating costs, limited flexibility, and require time-consuming screwing of compactor plates, which can lead to play and jamming issues during operation.
Innovation Solution
An add-on compactor with a bolt securing system featuring a conical active section and a double-acting hydraulic cylinder for secure mounting, allowing for easy replacement of compactor plates and coupling with excavators without play, using the excavator's hydraulic supply to simplify locking and reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screwing system is used to secure the compactor plate, then the mounting is secure, but the assembly and disassembly process becomes time-consuming
Solution Approach 1:
The patent replaces the traditional screwing mechanical system with a bolt securing system. The bolt (46) with conical active section (48) provides secure mounting through a clamping effect when pressed against the compactor plate (22), eliminating the need for time-consuming screwing operations while maintaining reliable connection between the compactor plate and housing (12).
Solution Approach 2:
The patent employs a double-acting hydraulic cylinder (42) to actuate the bolt (46) for securing the compactor plate. The hydraulic system provides controlled movement of the bolt into and out of the locked position, enabling rapid and secure assembly/disassembly operations powered by the excavator's hydraulic supply.
2Reliability
If traditional locking mechanisms are used, then the compactor plate is secured, but the structure becomes complex and costly to manufacture
Solution Approach 1:
The patent extracts and simplifies the locking mechanism to its essential function. Instead of complex rotary locks or multiple fastening elements, a single bolt (46) with conical active section (48) performs the locking function. This extracted simplified structure reduces manufacturing complexity and cost while maintaining reliable locking capability.
Solution Approach 2:
The patent changes the geometric parameters of the bolt's active section to a conical shape (48) with a specific angle α. This parameter change enables the bolt to create an effective clamping effect when pressed against the compactor plate, providing reliable locking with a simple structural form that is easier and cheaper to manufacture than traditional mechanisms.
3Reliability
If a robust locking system is implemented, then play and jamming are prevented, but the manufacturing cost increases
Solution Approach 1:
The patent employs a conical active section (48) with a specific angle α on the bolt (46). This geometric parameter change creates an effective clamping effect that prevents play and jamming during operation. The conical shape is simple to manufacture using standard machining processes, keeping production costs low while ensuring high operational reliability through constant contact pressure on the compactor plate.
Solution Approach 2:
The bolt (46) with conical active section (48) automatically maintains constant contact pressure with the compactor plate (22) during operation. The hydraulic cylinder continuously acts in the locking direction, and the conical geometry ensures that any movement or wear is compensated by automatic adjustment, preventing play and jamming without requiring additional adjustment mechanisms or maintenance interventions.
4Stability of the object's composition
If the compactor plate is securely fastened, then operational stability is improved, but the time required for plate replacement increases
Solution Approach 1:
The patent replaces the traditional multi-step mechanical fastening system with a hydraulic bolt actuation system. The double-acting hydraulic cylinder (42) controls the bolt (46) to engage and disengage the compactor plate (22) rapidly. This substitution provides secure fastening during operation while enabling quick plate replacement by simply actuating the hydraulic cylinder in reverse, significantly reducing replacement time.
Solution Approach 2:
The patent makes the locking system dynamic through the double-acting hydraulic cylinder (42). The bolt (46) can be quickly moved between locked and unlocked positions based on operational requirements. This dynamic capability allows the system to maintain stable compactor plate attachment during operation while enabling rapid plate changes when needed, optimizing both operational stability and maintenance efficiency.
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 provides a cost-effective, flexible, and robust add-on compactor that can be used in various trench sizes, ensuring secure mounting and easy assembly/disassembly, reducing operational costs and play issues, while maintaining high locking forces and operational reliability.
Implementation Method 1
The bolt (46) has a conical active section (48). This facilitates the locking process (reduction of the risk of a blockage) and creates a secure mounting of the compressor plate on the housing (clamping effect).
Implementation Method 2
The bolt is advantageously actuated by a double-acting hydraulic cylinder by means of the excavator's hydraulic supply. As a result, high locking forces can be generated which hold the compressor plate particularly securely on the housing
Implementation Method 3
EP 1 536 068 A2 describes a compressor device that can be coupled to an excavator, with at least one buffer device for vibration decoupling
Data Source
Figure 1
Figure 2~4
Figure 5~6
AI summary
The compactor (10) has a housing (12), and a compactor plate (22), which is detachably secured at the housing by a movable catch (46) including a conical working section. The housing has a recess (32) cooperating with a rod (56b) of the compactor plate and running parallel to the compactor plate. The housing has a recess (36) cooperating with a rod (56a) of the plate and comprising an edge (38), which runs orthogonal to the plate. The catch secures the rod (56a) at the recess (36), where both the rods extend in a transverse direction.