Explosion-proof truck detachable cable connection
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Solution Overview
Problem
Existing explosion-protected industrial trucks face challenges in providing a functionally reliable and easy-to-use cable connection for the explosion-proof transmission of relatively high electrical power, requiring specialized training and involving complex procedures for connecting external cables.
Innovation Solution
A detachable cable connection system featuring a single contact bolt with a cable gland and insulating sleeve, allowing for secure sealing and high power transmission without needing to open the housing, utilizing a contact screw with a sheathed cable lug and a radial flange for electrical insulation, and a design that enables easy integration and fastening within the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional multi-wire connection bases with plug connections are used, then control and signal lines can be connected, but the connection of external cables for high electrical power requires opening the housing and specialized training
Solution Approach 1:
The connection base is segmented into a housing with an integrated single contact bolt and a separate cable gland assembly. The cable gland can be independently attached to seal the cable connection area, allowing the cable connection to be made externally without opening the housing. This segmentation enables simplified cable connection procedures while maintaining explosion protection.
Solution Approach 2:
The cable gland acts as an intermediary component between the external cable and the internal contact bolt. It provides a sealing interface that allows the cable to pass through the housing wall without compromising the explosion-proof enclosure, enabling external cable connection while maintaining housing integrity.
2Reliability
If cable connections are made within the flameproof housing, then explosion protection is maintained, but the housing must be opened and closed again requiring intensive training
Solution Approach 1:
The contact bolt is pre-installed and integrated into the connection base housing before the cable connection is made. The cable gland is designed to be attached externally to seal the connection area. This preliminary arrangement allows the cable connection to be performed externally without opening the housing, maintaining both explosion protection and operational simplicity.
3Ease of operation
If a single contact bolt design is used, then cable connection can be simplified and preassembly is enabled, but the transmission of high electrical power must be ensured
Solution Approach 1:
The contact bolt features a spherical contact surface that interfaces with the cable gland's contact element. This spherical geometry ensures optimal contact area and uniform pressure distribution, enabling reliable transmission of high electrical power through a single contact point while maintaining simplified connection procedures.
4Volume of moving object
If the connection base is integrated into the housing wall, then space efficiency is improved, but the cable connection area must be sealed against the environment
Solution Approach 1:
The cable gland incorporates a flexible sealing element (cable seal) that conformally seals around the cable where it passes through the connection base. This flexible seal maintains the explosion-proof enclosure integrity while allowing the cable to pass through, enabling compact integration without compromising environmental sealing.
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
Enables reliable and efficient transmission of high electrical power while ensuring explosion protection, allowing for preassembly of electrical modules and reducing the need for extensive electrical engineering expertise, with a design that is space-efficient and adaptable for various applications.
Implementation Method 1
a cable gland with which the cable connection can be sealed against the environment in the connection area of the cable to the contact bolt
Implementation Method 2
the contact pin is surrounded by an insulating sleeve
Implementation Method 3
Enables reliable and efficient transmission of high electrical power while ensuring explosion protection
Data Source
Figure 1
Figure 2~5
Figure 3~4
AI summary
The invention relates to an explosion-proof industrial truck with a detachable cable connection, which has a connection base (2 or 20) that can be attached to a housing wall (4b) of a housing (4), to which a cable (K) can be connected in a connection area of the cable connection located outside the housing (4). To enable a reliable and easy-to-handle cable connection for the explosion-proof transmission of relatively high electrical power, the invention proposes that the connection base (2 or 20) has a single contact pin (5) to which the cable (K) can be connected by means of a cable gland (V) that seals against the environment.