DE7133755U - GEAR FOR THE MIXING DRUM ON A CONCRETE MIXING VEHICLE - Google Patents

Description

FATBiJT LAWYER DR. O. Dn TMANIM K. L. SCHIFF DP. A. ν. FÜNER DIPL. IN O. P. STREB! - /, MAHIAH1LPPLATZ 2 ft S j

DG-4427

description

to the
Utility model registration

of the Lord

BAIARDO GIANFRANCO
Cornarede (Milano)
Via Crece 99

concerning
Gearbox for the mixer drum on a concrete mixer truck

Priority: Sept. 18, 1970, Italy, No. 22913 B / 70 utility model

The invention relates to a transmission for the mixing drum on a concrete mixer vehicle.

In construction, it is quite common to use special concrete mixers mounted on special trucks, commonly referred to as ⁿ concrete mixers ¹¹ , to transport concrete mixes. These vehicles represent a considerable economic advantage for construction companies, and their spread is also due to the fact that they generate new industrial activity in the field of manufacturers and distributors of pre-mixed cement and concrete.

These vehicles have therefore constantly found the special attention of their designers, who continue to do so

developed vehicles suitable for heavy-duty use on construction sites. the conventional cement mixer vehicles are as follows built up. A drum is mounted on the vehicle frame, the diameter of which corresponds to ordinary standards and is within the limits given by road traffic regulations. Inside the drum is a series of helical ones Wings attached to mix the inert cement and water mixtures. At one end is the j.rommel provided with an opening through which the components to be mixed are introduced and the concrete removed after mixing will.

At the lower end of the drum, i.e. on the opening for the filling and removal of the mixture on the opposite side, a pin is usually attached to the is coupled to a suitable bearing forming one of the drum supports. Another drum support is near that Loading opening arranged and equipped with two rollers, on which the drum has a ring or a running surface rotates. Said ring is usually on the conical part of the drum at a distance of about 0.5 m from the Loading and unloading opening arranged. The rolling or twisting motion the drum is transmitted through a hydraulic or mechanical transmission; always with worked a system that features a pinion, the bearing of which is attached to the frame, as well as a crown, which is arranged on the underside of the drum and mounted on a pin in alignment with the drum's longitudinal axis, include, a chain is used to transmit the movement of the pinion to the crown. Using a Chain makes a chain tensioning device necessary.

The object of the invention is to replace these parts and thereby reduce the costs of manufacture, installation and maintenance to reduce. This object is achieved according to the invention in

essential in that an axial bearing with external or internal teeth is provided, the diameter of which in the The order of magnitude of the drum diameter and at the same time a support of the mixing drum and a part the reduction from the drive to the drum. The torque is preferably transmitted in this case via an epicyclic reduction gear.

In the following a preferred embodiment of the invention is described with reference to the drawings; in the Show drawings

Fig. 1 shows a concrete mixer vehicle in which the inventive Gear is indicated, and

2 shows an axial section through the transmission according to the invention.

According to the drawings, the general ait D is located designated transmission according to the invention on the lower end face of a mixing drum 2, which is on the frame 8 of a Concrete mixer vehicle 1 is mounted. A drive motor 3 is coupled to a reduction gear 4, the housing of which is attached to a plate 5. The plate 5 is mounted on elastic supports 7 on the frame 8 and with an outer ring 6 connected. The reduced drive movement is via an output shaft provided with a pinion 10 9 of the transmission 4 is transmitted to planet gears 11 which are mounted in the plate 5. The planet gears mesh with the internal teeth 12 of a bearing ring 13, which is on the lower end face of the drum 2 by means Bolt 14 is attached. The bearing ring 13 is in the outer ring 6 via one or more rows of rollers or Balls 15 stored. The two rings 6 and 13 together with the bearing bodies 15 form a bearing, which in particular is designed to absorb axial forces.

7iM7asiu.ii;

As an alternative to the solution described above could also the ring 6 can be provided with external teeth. The transmission of the anti-friction movement to the drum 2 takes place then via the connection of this externally toothed ring 6 with a pinion arranged on the reduction gear 4, in which case the support on the inner ring 13 takes place.

Claims (4)

PATBNTAN WA LTH DR. O. DiTTMANN K. U. SCHIFF DR. Λ. ν. FÜNI5R DIPI .. ING. P. STREU! - MUNICH HO MARIAHlLFPbATZ Z & 8 Baiardo Gianfranco 31 JAN. 1972 Our file: DG-4427 PS / bi L- 1. Gearbox for the mixing drum on a 3-ton mixing conveyor? .Hr: * eug, '■■■ marked by an axial bearing (6, 13, j; 15) with external or internal teeth (12), the diameter of which t is of the order of magnitude of the diameter of the drum, for : ν which the gearbox is intended for, the fastening elements ! having the mixing drum and the output element of a | i reduction device forms. 2. Transmission according to claim 1, characterized in that that the bearing comprises an internally toothed bearing ring (13) for attachment to the mixing drum and that this The bearing ring engages with planet gears (11) which in turn mesh with a pinion (1o) arranged on the gear drive shaft (9). 3. Transmission according to claim 2, characterized in that that the pinion (Ίο) with a drive-side reduction gear (4) is coupled. 4. Transmission according to one of claims 1 to 3, characterized in that that on a bearing ring (6) of the axial bearing extending in the axial direction supports (7) for Attachment of the gearbox are attached to the vehicle.