DE2554209A1 - SAFETY FRAME FOR TRACTORS - Google Patents

Description

T.EDTKE - BüHLING - K.NNE

DipL-Chem. Bühling Dipl.-Ing. Chins

8 Munich 2, PO Box 202403 Bavariaring 4

Tel .: (0 89) 53 9653-56

Telex: 5 24845 tipat

cable: Germaniapatent Munich

December 2, 1975 B 6977

Georg Fritzmeier KG
8011 Großhelfendorf

Safety protective frame for tractors

The invention relates to a safety protective frame for tractors, made of two parallel spaced U-shaped brackets that overlap the driver's seat and that are connected to their overhead bridge carry a roof structure and their legs on each side together in pairs on the rear wheel axle are supported and connected to the rear fenders, which in turn are supported on the transmission block.

The protective frame is attached to the rear wheel axle usually by screwing tightly to this axis. As a result, and in particular also via the fenders, are considerable Noises in the area of the driver's seat, in particular noises transmitted by vibration of the fenders, so that a sensitive noise nuisance occurs.

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The object of the invention is to create a protective frame that has a lower level of noise and is easier to use constructive solution guaranteed.

This object is achieved in that the support of the bracket legs on each side by means of a common support plate via an elastic support body and each rear fender at a distance from Support body is releasably supported indirectly on the transmission block via the floor panel of the tractor. Due to the elastic Supporting the frame on the rear wheel axle are no longer directly affected by these vibrations on the protective frame transmitted and at the same time vibrations of the rear fenders connected to the protective frame are reduced, In addition, by their support at a distance from the support body ensure the stability of the protective frame on the base plate.

For increased security, it is advantageous if each Support plate is supported on the rear wheel axle in addition to the support body with stud bolts distributed around it, which have radial and axial play. This game makes contact within the scope of the usual suspension travel of the support body between the protective frame and the rear wheel axle, while in the event of increased stress, e.g. in the case of in the event of an overturn, the stud bolts act as a stop. These studs are already sufficient that to absorb forces occurring in the event of a rollover, so that there is basically no further support for the protective frame needs about the fender. Hler can in such a Fall all the deformation work in the area of the support plate

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be done so that in the event of a suspension Cabin on the protective frame a simple, weakly dimensioned support in the area in front of the frame, for example on the gear block is possible. This makes it easier to quickly convert to an elastically mounted cabin constructive solution guaranteed. Also, any otherwise rigidly supported protective frame can be considered elastic in the simplest way Frame to be converted.

• The elastic support made according to the invention the protective frame is particularly suitable in the event that the support frame becomes an integral part of a cabin, in which vibrations are particularly annoying for the driver, so that it is necessary to provide the entire support designed as an isolator from structure-borne noise. In the case of using the protective frame as a carrier for a cabin the floor pan is supported by an elastically supported on the vehicle frame, so that then one with the Protective frame combined cabin on the one hand over the protective frame elastic on the rear wheel axle and on the other hand over the floor pan or floor assembly is elastic on other parts of the tractor, e.g. on the clutch housing or on the transmission block is supported and thus structure-borne noise transmission with the tractor is avoided.

The invention is explained in more detail below with reference to schematic drawings of an exemplary embodiment.

Fig. 1 is a partial side elevational view of the rear wheel area of a tractor with a safety guard frame;

Fig. 2 shows on an enlarged scale a detail of the

Fig. 1.

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In Fig. 1 is the rear portion of a tractor Mainly, the driver of a tractor sits between the rear wheel fenders 1 that face him delimit the rear wheels 2, which in turn are supported on the rear wheel axle 3. The rear axle itself forms a load-bearing unit with the transmission block 4, on which the clutch housing 5 and connect the engine block 6.

To protect the driver, the driver's seat, not shown, is spanned by a safety protective frame, which consists of two parallel spaced U-shaped brackets 7, the web of which is a roof structure 8 carries or is formed by such a roof structure. The vertical legs 9 of the bracket 7 are by means of corresponding Tabs 10 are placed on each side on an upper cover plate or upper plate 11 of the fender 1 and are intercepted by means of an approximately V-shaped support frame 12, the two struts 13 of which with a bent horizontal Section 14 engages under the upper fender panel in the area of the bracket legs 9 and with its essentially vertical Section attached to the fender side panel 15 and supported on the rear wheel axle 3 via a support plate 16. The support via the support plate is shown in detail in FIG. The struts 13 are releasable or fixed to the Support plate connected, which in turn is elastically supported on the rear wheel axle. The support plate 16 is supported on a counter bracket 17, which in turn is firmly attached to the rear

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wheel axle 3 is screwed or braced. The support is provided by an elastic support body 18, which is screwed to the counter bracket and by means of a continuous vertical bolt 19 on the support plate 16 is secured. The support body 18 ″ is diametrically opposed to one another in the longitudinal direction of the tractor opposite sides flanked by 2 stud bolts 20, which are inserted from below through the counter bracket 17 and by means of Lock nuts 21 are secured on the support plate 16, the bolts 20 protruding through the counter bracket 17 with radial play and the lower in the drawing lock nuts 21 are so far removed from the counter bracket that one of the normal Spring travel of the support body 18 corresponding axial displacement of the support plate 16 relative to the counter bracket 17 is possible. The stud bolts 20 come with their stops, i.e. with the lock nuts 21 or with the bolt head with the counter bracket 17 in support connection when the protective frame z, B. is excessively encumbered as a result of a coup.

The rear wheel fender 1, which is covered with the support frame 12 with its side panel 15, is at 22 with the floor pan or the floor panel of the tractor connected, the is in turn supported on the transmission block 4. By attaching the rear fender to the support frame on the one hand and on the other hand, at a distance from this on the floor panel, there is a further support for the protective frame, which increases the stability increased and otherwise vibrations of the fender and there-

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with drum noise attenuates sensitive, so that in connection with the elastic support of the protective frame a noticeable reduction in noise pollution for the driver is reached.

In the event that the protective frame is included in an elastically supported driver's cab, the floor panel is used detached from the transmission block and from a subframe undertake, which is elastically supported against the transmission block or the clutch housing, with all others Parts of the cabin on the protective frame or the floor pan (created from a detached base plate and connected to this transmission tunnel at a distance from the transmission block) be, so that the cabin itself forms an elastically supported unit together with the protective frame, which against body sound transmission is isolated. The securing of the protective frame by means of the stud bolts also ensures low Supporting load on the cabin at a distance from the frame on the vehicle, since the stud bolts alone are sufficient when overturning absorb forces of the frame.

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Claims (8)

Claims ι l. \ Safety protective frame for tractors, made of two parallel spaced U-shaped brackets spanning the driver's seat, which carry a roof structure with their overhead bridge and whose legs are supported in pairs on each side on the rear wheel axle and with the rear wheel fenders are connected, which in turn are supported on the transmission block, characterized in that the support of the bracket legs (9) on each tractor side is in each case by means of a common support plate (16) via an elastic support body (18) and each rear wheel mudguard at a distance from the support body via the floor panel of the tractor is indirectly releasably supported on the transmission block. 2. Protective frame according to claim 1, characterized in that the two bracket legs (9) on each side of the tractor the upper cover plate (11) of the rear wheel fender (1) is placed on top and supported by means of an approximately V-shaped support frame (12) are, the two struts (13) with a bent horizontal section (14) the cover plate in the area of the bracket legs reach under and supported with an in the v / eslichen vertical section on the fender side panel (15) and below the support plate (16) are attached. 709823/0124 ORIGINAL INSPECTED 2554203 - ^ g - . ζ. 3. Protective frame according to claim 1 or 2, characterized in that the rear wheel fender (1) supporting, The bottom plate detached from the transmission block is supported by a subframe, which in turn has elastic bodies is fixed on the tractor. 4. Protective frame, in particular according to one or more of the preceding claims, characterized in that the Support plate (16) in addition to the support body (18) with stud bolts (20) al «? Limit stop on the rear wheel axle is supported, which have radial and axial play. 5. Protective frame according to claim 4, characterized in that the stud bolts (20) are firmly screwed to the support plate (16) and a counter bracket (17) attached to the rear wheel axle (3) protrude upwards with radial play, wherein her head as a stop on the underside of the yoke and their anchoring on the support plate serve as a limit stop on the top of the support plate. 6. Protective frame according to claim 4 or 5, characterized in that the stud bolts (20) on the support plate (16) are set adjustable by means of lock nuts. 7. Protective frame according to claim 4 to 6, characterized in that each support body (18) has two these in the vehicle longitudinal direction flanking stud bolts (20) are assigned. 709823/0124 2554203 8. Protective frame according to one or more of the preceding Claims 1 to 7, characterized in that the elastic support body (18) is screwed to the counter bracket and is secured to the support plate (16) by means of a vertical bolt (19) protruding through it. 7 0 98 23 / OT 24