SE176852C1

SE176852C1 -

Info

Publication number: SE176852C1
Authority: SE
Publication date: 1961-01-01

Description

Uppfinnare: G Thiman Foreliggande uppfinning hanfor sig till sadana drivbandanordningar for traktorer, som best a av pa inbordes avstand jamnlopande hand och dessa forbindande, tvargaende bladfjadrar, vilka i mellanrummet mellan banden aro fOrsedda med styrkammar fOr samverkan med traktorns drivhjul ocb. spannhjul. Andamdlet med uppfinningen är att utforma styrkammarna sa, att eft forbattrat ingrepp uppnas mellan drivhjul och band och undvika den vid kanda utftiranden ftirekommande oldgenheten med daligt drivingrepp mellan traktorbandet och drivhjulets kuggar, som vid viss belastning latt hoppa forbi drivingreppsstallena pa bandet. Inventor: G Thiman The present invention relates to such drive belt devices for tractors, which consist of a running hand at a distance inboard and these connecting, transverse leaf springs, which in the space between the belts are provided with guide chambers for co-operation with the tractor's drive wheels and the like. spinning wheels. The object of the invention is to design the control chambers so that, after improved engagement, a drive is obtained between the drive wheels and the belt and to avoid the old-fashioned antiquity with poor driving engagement between the tractor belt and the drive wheel teeth, which at certain loads can skip past the driving engagement stalls on the belt.

Det for uppfinningen vasentligt utmarkande är, att styrkammen ar forsedd med fa.stdelar, som tacka bladfjaderns, i mellanrummet mellan banden befintliga, framre och bakre kanter och bilda angreppsytor for drivhjulets kuggar. De kanterna tackande fastdelarna medfora en vasentlig okning av tjockleken av de tvargaende delar av bladfjadrarna, pa vilka drivhjulens kuggar angripa, varigenom det blir mojligt att anvanda hjul med grovre kuggar an forut. Harigenom forbattras drivin.- greppet avsevart. Vidare skyddas kugghjulen fOr de skarpa bladfjaderkanterna. The essential feature of the invention is that the guide cam is provided with fasteners which thank the front and rear edges of the leaf spring, located in the space between the belts, and form contact surfaces for the teeth of the drive wheel. The edges tacking the fixed parts cause a substantial increase in the thickness of the transverse parts of the leaf springs, on which the teeth of the drive wheels attack, whereby it becomes possible to use wheels with coarser teeth than before. As a result, the drive grip is significantly improved. Furthermore, the gears are protected from the sharp leaf spring edges.

Ett exempel pa uppfinningens tillampning visas pa ritningen, dar fig. 1 visar en tvarseklion genom bandanordningen och fig. 2 en horisontalprojektion med styrkammen delvis i sektion. Fig. 3 visar en sektion genom bladfjadern pa det stalle, dar styrkammen Or anbragt. An example of the application of the invention is shown in the drawing, in which Fig. 1 shows a transverse clion through the belt device and Fig. 2 a horizontal projection with the guide cam partly in section. Fig. 3 shows a section through the leaf spring at the place where the guide cam Or is arranged.

Bandanordningen bestar av tva jamnlopande band 10, 12, t. ex. av gummi, armerade me-deist langsgaende staltradslinor 14, och sammanhallna pa avstand fran varandra medelst tvargaende bladfjadrar 16, som aro fasts atta pa banden medelst skruvbultar med muttrar 18. Narmast de mot varandra vanda kanterna av banden 10, 12 Oro kortare bladfjadrar 20 sammanlagda och hopbultade med bladfjadrarna 16, bildande forstarkningar, som Overbrygga mellanrummet mellan banden. Mitt emellan banden 10, 12 finnes en styrkam 22, avsedd att pa kant satt ingripa i mellanrummet mellan de hada kugghjul pa drivrullen till traktorbandet, som driva bandet. The belt device consists of two parallel belts 10, 12, e.g. made of rubber, reinforced with longitudinal longitudinal steel guide lines 14, and held together at a distance from each other by means of transverse leaf springs 16, which are attached to the belts by means of screw bolts with nuts 18. Closest to the opposite edges of the belts 10, 12 and bolted together with the leaf springs 16, forming reinforcements, which bridge the space between the bands. In the middle between the belts 10, 12 there is a guide cam 22, intended to engage on the edge between the two gears on the drive roller of the tractor belt, which drive the belt.

Styrkammen 22 Or pa vardera sidan utbildad med en fastdel 24, som Or -vikt ned framf Or bladfjaderns 16 och forstarkningsjarnets 20 kanter. Sasom fig. 3 visar, Or denna fast-del i kuvucisak U-formad med avrundade kanter 26, som bilda lampliga glidytor for drivhjulets kuggar. Fastdelarna 24 genomgas av bultar 28, 30, medelst vilka styrkammen Or fastsatt pa bladfjadern. The guide cam 22 is formed on each side by a fixed part 24, which is folded down in front of the edges of the leaf spring 16 and the reinforcing iron 20. As Fig. 3 shows, this fixed part in kuvucisak U-shaped with rounded edges 26, which form suitable sliding surfaces for the teeth of the drive wheel. The fixed parts 24 are passed through by bolts 28, 30, by means of which the guide cam Or is fixed to the leaf spring.

Banden och 12 kunna saval sjalva som i fraga om fastgoringsdetaljerna vara lika. Pa ritningen visas olika detaljutfOranden ph den vanstra och den hogra sidan om styrkammen i avsikt att belysa olika mojligheter. Uppfinningen Or dock ej begransad till dessa detaljer. The straps and 12 can be the same as in the case of the fastening details. The drawing shows different detailed designs on the left and right sides of the guide cam in order to illuminate different possibilities. The invention, however, is not limited to these details.

Pa ritningen visas gummikutsar 32 under styrningen och bandet i Ovrigt. Dessa gummikutsar verka sasom griporgan mot markytan. Till vanster, dar bandet 10 Or fast pa en U-balk, bidrager Oven dennas flansar till markingreppet. Gummiklotsarna kunna hell eller delvis undvaras. I stallet kunna griporgan astadkommas genom att fastdelens 24 nedre kantpartier neddragas •ett stycke 31, sasom visas med streckprickade linjer i fig. 3. The drawing shows rubber cushions 32 under the guide and the belt in Other. These rubber pads act as gripping means against the ground surface. To the left, where the band 10 Or is attached to a U-beam, Oven contributes its flanges to the ground grip. The rubber blocks can be completely or partially dispensed with. Instead, gripping means can be provided by pulling down the lower edge portions of the fixed part 24 by a piece 31, as shown by dash-dotted lines in Fig. 3.

P at entansprak: 1. For traktorer avsedd drivbandanordning med pa inbordes avstand jamnlopande band (10, 12), forenade medelst tvargaende bladfjadrar (16), som i mellanrummet mellan banden. Oro forsedda med styrkammar (22) for samverkan med traktorns drivhjul och spannhjul, kannetecknad darav, att styrkammen (22) Or fOrsedd med fastdelar (24), som tacka bladfjaderns (16) i mellanrummet mellan banden (10, 12) befintliga framre och bakre kanter och bilda angreppsytor for drivhjulets kuggar. At one request: 1. Tractor drive device with inwardly spaced belts (10, 12), joined by means of transverse leaf springs (16), as in the space between the belts. Concerns provided with guide cams (22) for co-operation with the tractor's drive wheels and tension wheels, characterized in that the guide cams (22) are provided with fixed parts (24) which thank the leaf spring (16) in the space between the belts (10, 12) existing front and rear edges and form attack surfaces for the drive gear teeth.

Claims

Patent claim:

Tractor drive device intended for tractors with inwardly spaced belts (10, 12), joined by means of transverse leaf springs (16), as in the space between the belts. Concerns provided with guide cams (22) for co-operation with the tractor's drive wheels and spinning wheels, characterized in that the guide cams (22) are provided with fixed parts (24) which thank the leaf spring (16) in the space between the belts (10, 12) existing front and rear edges and form attack surfaces for the drive gear teeth.

Device according to patent claim 1, Unexpected in that the edge portions of the fixed parts (24) are pulled down under the straps so that they form gripping means (34) for improving the grounding grip.