Counterweight Mounting Plate for Industrial Vehicle Drive Device
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Solution Overview
Problem
Conventional industrial vehicles face challenges in accurately mounting the drive device to the counterweight due to surface roughness and thermal shrinkage issues, making it difficult to manufacture them accurately.
Innovation Solution
The industrial vehicle design incorporates a counterweight with machined reference portions and mounting holes that allow for precise positioning and machining, enabling accurate mounting of the drive device through leaf spring suspensions, eliminating the need for welding and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mountings are welded to the counterweight to enable drive device mounting, then the drive device can be mounted to the counterweight, but the mounting position accuracy deteriorates due to surface roughness and thermal shrinkage
Solution Approach 1:
The patent replaces the welding process with a mechanical attachment system. Instead of welding mountings to the counterweight, the invention uses a mounting plate with mounting holes that is mechanically attached to the counterweight using bolts or other mechanical fasteners. This substitution eliminates the thermal shrinkage and surface roughness issues associated with welding, thereby improving mounting position accuracy while maintaining ease of manufacture.
Solution Approach 2:
The patent introduces a mounting plate as an intermediary component between the counterweight and the drive device. This mounting plate serves as a mediator that provides precise mounting holes for attaching the drive device, while being separately attachable to the counterweight. The intermediary mounting plate decouples the mounting precision requirements from the counterweight surface quality, solving the contradiction between ease of manufacture and mounting precision.
2Strength
If welding is used to attach mountings to counterweight, then structural connection is achieved, but manufacturing complexity increases due to need for high accuracy welding
Solution Approach 1:
The patent replaces the welding process with mechanical fastening using bolts or other mechanical connectors. This substitution maintains the structural connection strength between the mounting plate and counterweight while significantly reducing manufacturing process complexity. The mechanical fastening method is more tolerant of alignment variations and does not require the high precision welding skills and equipment, thereby simplifying the manufacturing process.
3Ease of manufacture
If conventional casting method is used for counterweight, then counterweight can be manufactured, but surface roughness and thermal shrinkage cause mounting position irregularity
Solution Approach 1:
The patent introduces a mounting plate as an intermediary that decouples the counterweight manufacturing process from the mounting position precision requirements. The mounting plate provides precisely located mounting holes that are not affected by the surface roughness or thermal shrinkage of the cast counterweight. This intermediary component allows the counterweight to be manufactured using conventional casting methods while maintaining precise mounting positions for the drive device.
Solution Approach 2:
The patent segments the mounting function from the counterweight structure itself by using a separate mounting plate. This segmentation allows the counterweight to be optimized for its primary function (providing mass and structural support through casting) while the mounting plate handles the precision mounting requirements. The separation of functions resolves the contradiction between ease of counterweight manufacturing and mounting position regularity.
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 approach allows for high-accuracy mounting of the drive device to the counterweight, simplifying the manufacturing process and reducing costs by eliminating the need for complex welding and ensuring precise alignment.
Implementation Method 1
a pair of damping members that are mounted to the counterweight on right and left sides of the rear wheels and that allow relative motion between the counterweight and the rear wheels
Data Source
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AI summary
An industrial vehicle includes a frame, a counterweight that is connected to a rear part of the frame and a drive device that drives rear wheels. The drive device includes a drive device body and a pair of damping members that is mounted to the counterweight on right and left sides of the drive device body and allows relative motion between the counterweight and the rear wheels. The counterweight has a left mounting portion and a right mounting portion that are formed by machining. The left mounting portion and the right mounting portion have a first mounting hole and a second mounting hole, respectively, through which the respective damping members are mounted to the left mounting portion and the right mounting portion. The first mounting hole and the second mounting hole are formed coaxially with each other.