TEST REPORT n 40b - 001

Transcription

1 TESTING SERVICE OF FUNCTIONAL AND SAFETY CHARACTERISTICS OF AGRICULTURAL MACHINES TEST REPORT n 40b - 00 CBM GROUP COUPLING, TOWING AND LIFTING SYSTEM MANUFACTURER: CBM S.P.A. COSTRUZIONI MECCANICHE Via L. Gazzotti, Modena, Italy Rome, november 00

2 MEASUREMENT CONDUCED AT THE ISTITUTO SPERIMENTALE PER LA MECCANIZZAZIONE AGRICOLA, TREVIGLIO (BG) BRANCH, BY: Director: Ing. Giovanni Santoro Dott. Carlo Bisaglia CONTENTS DESCRIPTION OF THE DEVICE 3 TECHNICAL SPECIFICATIONS 4 Towing coupling 4 Lifting coupling 5 MEASUREMENTS CONDUCTED 5 CONCLUSIONS 7 /8

3 Upper link with quick coupler Hydraulic lifter Slider with towing hook Lift arm Attachment frame Adjustable lift rod with handle side stabilizer Lower link Quick coupler Figure Schematic view of the coupling, towing and lifting system for operating machines. Description of the device The CBM Group towing and lifting coupling system, which is the subject of this test report, offers a wide range of possibilities for coupling machinery to tractors of up to a 63 kw power rating. This is thanks to a series of components that are specifically designed and interchangeable, according to requirements. In the case of the towing coupling, the system is fitted with two basic configurations, which can be alternated. In the first the connection is made via an attachment frame to the body of the tractor fitted with vertical sliding guides (Fig. ). The guides are fitted, on the interior, with holes set up to enable the insertion and/or the height adjustment, in seven positions, of the various coupling devices available; a mobile protective casing, fitted above, completes the frame trim. The towing devices that can be installed are essentially made up of the towing hook and of the oscillating bar. This configuration is also designed for an attachment called a «piton fix», whose main feature is to support heavy vertical loads (> 3000 kg). The second configuration, designed for the towing coupling, is set up by removing the attachment frame with vertical guides and the articulation plate of the lower arms and installing the support frame of the automatic coupling device (Fig. ). This device, called pickup hitch, is basically made up of a towing hook fitted onto a front articulated plate which can be unhooked via a manually operated lift rod positioned near the tractor seat designed to facilitate attaching the trailer; the blocking/unblocking of the plate is operated by the intervention of the lift arms, by means of rods, connected to two lift rods. Finally, in the case of the lifting coupling, the three point attachment, category -N, is fitted as standard, with quick release hooks and lift rods, both adjustable by means of handles. 3/8

4 3 3 Fig. 3 Towing hook with vertical adjustment device: ) control lever; ) locking pin. 4 4 Fig. Towing bar with automatic coupling: ) lift rods; ) hook to unblock/block the towing plate; 3) lift rod for unblocking plate, to position near the driving seat; 4) hook. The towing bar (Fig. 6), is connected to the attachment frame before inserting a further support into the vertical guides, usually located in the lower part of the tractor body and locked by means of two lateral fixing pins. The bar support, shown in Fig. 7, is fitted with a purposely designed articulation pin that Technical specifications Towing coupling The frame with sliding vertical guides can be fitted with manually operated towing hooks conforming to EEC Directive 89/73 annex IV and EEC 000/ (Fig. 3), semiautomatic (Fig. 4) or automatic towing hook (Fig. 5). In all cases, they are adjusted vertically by means of a manually operated control lever that acts on the lateral pins, which lock the hook into position at the desired height. The tractor attachment frame also supports the oscillating bar conforming to EEC Directive 89/73, annex IV. Fig. 4 Tow hook, height adjustable, with semiautomatic pin. A sliding handle () allows the connecting pin to be locked. 4/8

5 3 Fig. 5 Tow hook, height adjustable, with automatic coupling device. ) pin lifting lever; ) eye presence sensor and pin insertion activator. enables the bar to rotate horizontally. The rotation can be locked, in sections, by means of a central pin. Fig. 7 Support frame for the towing bar and the piton fix. ) towing bar articulation pin; ) piton-fix; 3) Eye lock. Lifting coupling This device is based on a three point attachment of category ISO -N and of a hydrostatic lifting device briefly described in Tab.. Fig. 6 Oscillating bar inserted in the specific articulation support. The towing bar can be extracted, leaving the connection support inserted in the vertical sliding guides that also constitutes a particular type of towing coupling, known as a «piton fix», conforming to the draft international standard ISO 6489/4. Make Mita Oleodinamica Model M60 STD. Type Controlled force Hydraulic system Open centre Transport lock Hydraulic Number of cylinders (internal) Max. oil capacity (l/min) 50 Working pressure (bar) 80 Max. working temperature ( C) 90 Tab. Identification data of the lifting device Measurements conducted The CBM Group coupling, towing and lifting system has been submitted to dimensional and structural tests with the collaboration of the Istituto Sperimentale per la Meccanizzazione Agricola of Treviglio (BG). The inspection was carried out on the load bearing coupling device using a standard test frame conforming to category of the international standard ISO 730-:994. The tests dealt with the articulation of the mechanical components of the system, 5/8

6 whereas dynamic lifting tests were not carried out. The analysis was carried out by fitting the coupling system onto an axle fitted with wheels complete with tyres of the following dimensions: 480/70 R 30. A radius index of 695 mm was calculated for these wheels (ISO 45-:99) that enabled the axle height to be established relative to the ground surface level. The lifting arms were subsequently operated by means of an auxiliary hydraulic device. The resulting measurements are shown in Tab.. Tab. Structure of the three point attachment connected to the test frame (*) Characteristics measured Reference to Fig. 8 Dimensions or range (mm) Settings chosen (mm) Length of lift arm: (A) Length of lower links: (B) Distance of lift arm pivot: horizontally (a) Point from rear-wheel axis: vertically (b) Horizontal distance between the lower link points: (u) Horizontal distance between the lift arm end points: (v) Length of upper link: (S) from 580 to Distance of upper link pivot point from rear wheel axis - horizontally: (c) vertically: (d) Distance of lower link pivot point from rear wheel axis - horizontally: (e) vertically: (f) 9 9 Distance of lower link pivot point to lift rod pivot points on (D) lower links: Length of lift rods: (L) from 500 to Height of lower hitch points relative to the rear-wheel axis: Length of lift rods: (L) Attachment of lift rod: (D) Low position: (h) High position: (H) (*) radius index: 695 mm. 6/8

7 Fig. 8 Diagram of the measurements carried out on the CBM Group three point attachment connected to the standard test frame. Conclusions On examination of the results of the be fulfilled, in addition, the connection operations were more ergonomic thanks to the automatic coupling system. Finally, measurements conducted, the CBM the lifting system structure was correctly Group coupling, towing and lifting system complies to current regulations as far as set up and offered a wide range of adjustments, in addition to being fitted with the manufacturing aspects are concerned. quick coupling devices as standard. The towing devices offered various modular solutions that allow a wide range of operative requirements to 7/8

8 THE PRESENT TEST REPORT, REGARDING THE CBM GROUP COUPLING, TOWING AND LIFTING SYSTEM, IS VALID FOR FIVE YEARS OR UNTIL THE REGULATIONS REFERRING TO THIS ARE MODIFIED AND IS OFFICIALLY RECOGNISED BY THE MEMBERS OF ENAMA: ASSOCAP (Associazione Nazionale dei Consorzi Agrari) CIA (Confederazione Italiana Agricoltori) COLDIRETTI (Confederazione Nazionale Coltivatori Diretti) CONFAGRICOLTURA (Confederazione Generale Agricoltura) UNACMA (Unione Nazionale Commercianti Macchine Agricole) UNACOMA (Unione Nazionale Costruttori Macchine Agricole) UNIMA (Unione Nazionale Imprese Meccanizzazione Agricola) AS WELL AS BY BOARD OF GOVERNORS OF ENAMA IN WHICH THE FOLLOWING ARE ALSO REPRESENTED: MIPAF (Ministero per le Politiche Agricole e Forestali) Regioni e Province Autonome ISMA (Istituto Sperimentale per la Meccanizzazione Agricola) THE TEST RESULTS ARE RECOGNIZED BY THE FOLLOWING TESTING STATIONS BELONGING TO ENTAM, WITH THE FOLLOWING NUMBERS: BLT - Bundesanstalt für Landtechnik n I 00/0 (Rottenhauserstraβe, A-350 Wieselburg, AUSTRIA) DLG - Deutsche Landwirtschafts-Gesellschaft e. V. n I (Eschborner Landstraβe, D Frankfurt am Main, GERMANY) FAT Eidgenössische Forschungsanstalt für n I 0.0 Agrarwirtschaft und Landtechnik (8356 Tänikon B. Aadorf, SWITZERLAND) is the European Network for Testing of Agricultural Machines and its purpose is to promote a cooperation among testing stations in order to optimize activities and give a better service to farmers, dealers and manufacturers. ENAMA ENTE NAZIONALE PER LA MECCANIZZAZIONE AGRICOLA VIA LAZZARO SPALLANZANI, /A ROMA PH FAX info@enama.it