DE1068737B - - Google Patents

Description

GERMAN

The invention relates to a street sweeper whose pivotable up about a rear axis of rotation The collecting container is closed at its rear end by a cover which can be swung open about an upper axis of rotation is. In a known street sweeper of this type, the lid carries the rubbish into one Suction shaft conveying pick-up broom and the suction shaft itself. This pick-up broom is with the drive mechanically coupled. When the cover is swung open, the mechanical drive of the broom must be disengaged will. However, this is often forgotten, so that the cardan shaft is used to drive the pick-up broom is often broken when the lid is swung open.

The invention is based on the object of avoiding this disadvantage of the known street sweeper. This object is achieved according to the invention in that to drive the pick-up broom in In a manner known per se, a hydraulic motor is provided which is driven by a motor driven by the vehicle engine and on the chassis at the front or at least at a certain distance in front of the axis of rotation of the The pump arranged in the collecting tank is driven via two lines by means of a pressure medium, and that both the supply line to the hydraulic motor and the return line from it to the pump in the Neighborhood of the axes of rotation of the collecting container and the lid comparatively short flexible parts having, which is arranged on a rigid part on the chassis and extending in the collecting container rigid part or to this rigid part and a rigid part extending in the cover of the respective Connect the line. These flexible parts in the vicinity of the axes of rotation enable the pressure medium supply lines fixed to the respective parts, namely the chassis, the container and the lid, connect to.

The use of a flexible connection directly from the chassis to the hydraulic motor would lead to the fact that you could either open the lid very little or the flexible line so long it would have to be that when the lid was closed it would hang down low and therefore light could get stuck somewhere. These difficulties are avoided by the invention.

Further features of the invention emerge from the following description of one shown in the drawing Embodiment. Show it

1 and 2 a side view and a plan view of a street sweeper,

Fig. 3 is a circuit diagram for the pipelines for the pressure medium for driving the hydraulic Motors,

4 shows a side view of the pipe feed line to the hydraulic motor of the pick-up broom.

Street sweeper

Applicant:

M. Streicher,
Stuttgart-Bad Cannstatt,
Krefelder Str. 10-14

Georg Schäffler, Stuttgart,
has been named as the inventor

In the drawing, a street sweeper is shown in which on a chassis 1 one by one rear axis of rotation 2 pivotable container 3 is arranged. The rear opening of the container 3 is through a cover 4 closed, which is pivotable about an upper axis of rotation 5. On the cover 4 is by means of a about an axis 6 pivotable rocker 7 a receiving broom 8 attached to the rubbish from the Road feeds a suction shaft 9. On the chassis 1 is also pivotable about an axis of rotation 10 in a Swing arm 11 is mounted on an inclined broom 12. Furthermore, one is not shown in the drawing Swing a gutter broom 13 is arranged.

According to the invention, a hydraulic motor 14 arranged on the rocker 7 is provided to drive the pick-up broom 8. This hydraulic motor 14 is connected to the broom 8 via a transmission, which is not shown in any further detail in the drawing. The inclined broom 12 and the gutter broom 13 are also driven by hydraulic motors 15 and 16. In Fig. 3 a circuit diagram for the pipelines for the hydraulic motors 14, 15 and 16 is shown. Then the hydraulic pressure medium, for. B. oil, sucked from a container 17 by a pump 18 through a line 19 and fed via a line 20 to the motors 14, 15 and 16 connected in parallel. The pressure medium from the motors 14, 15 and 16 is then fed back to the container 17 via a return line 21. Throttles 22 are provided in the feed lines to the individual motors, by means of which the running speed of the individual motors can be adjusted. In the supply line to the motor 15 for the inclined broom 12, a shut-off valve 23 is also switched on, which is closed by means of a linkage not shown in the drawing when the inclined broom 12 is pivoted up, so that the high .,, -. .-, 909 648/6

Claims (2)

swiveled broom 12 does not rotate. A pressure gauge 24 is also connected to the pressure line 20 to control the pressure. A pressure relief valve 25 and a control valve 26 are connected in parallel with the pump 18. The pressure relief valve 5 25 is set to a maximum pressure in the pressure line 20, so that in the event of pressure fluctuations or when the motor 15 for the inclined broom 12 is switched off, the maximum permissible rotational speed for the broom is prevented from being exceeded. The control valve 26 is preferably arranged on the driver's seat and is used to regulate the speed of rotation of the brooms. In Fig. 4, the lines for the motor 14 of the receiving broom 8 are shown. Since the two lines, namely the supply line and the return line, are arranged next to one another as seen in the direction of travel, only one line is visible in the side view. The lines for the motor 14 have rigid parts 33 arranged on the chassis 1, which are connected by flexible parts 35 to the rigid parts 34 running in the collecting container 3 in the vicinity of the axis of rotation 2 of the collecting container 3. The rigid parts 34 arranged in the collecting container 3 are in turn connected with flexible parts 37 to the rigid parts 36 arranged in the cover 4 in the vicinity of the axis of rotation 5 of the cover 4. Since the hydraulic motor 14 arranged on the rocker 7 is movable relative to the cover 4, flexible parts are also provided here in the supply and return lines for the pressure medium. Here, the last part of the lines connected directly to the motor can be flexible, but it is sufficient if the lines in the vicinity of the axis of rotation 6 of the rocker 7 have flexible parts, as shown in FIG connected rigid line ends 31 are connected to the one ends of flexible line parts 32 leading past the axis of rotation 6, the other ends of which are connected to the rigid line parts 36 connected to the cover 4. Although the motor 14 is connected to the pump 18 mounted on the chassis 1 via three parts that are movable relative to one another and relative to the chassis 1 (collecting container 3, cover 4, rocker 7), there are no difficulties or inconveniences for operating these movable parts, as in the case of the known street sweepers, in which the mechanical transmission must first be disengaged before the cover 4 is folded up. From a certain size, water containers are provided in all street sweepers for blasting the street. One embodiment of the invention provides that these water tanks are used to cool the pressure medium. This can e.g. B. done in such a way that the container for the pressure medium is connected to the water tanks in a thermally conductive manner. So z. B. the container for the pressure medium can be built into a water tank of the vehicle or attached to the water tank. Pat εχ τ aν s ρ π νcη ε 1. Street sweeper, whose collecting container, which can be swiveled up about a rear axis of rotation, is closed at its rear end by a cover which can be swiveled open about an upper axis of rotation and which carries a pick-up broom which transports the refuse into a suction shaft, is driven by the vehicle engine and preferably also carries this suction shaft, characterized in, that a hydraulic motor (14) is provided to drive the pick-up broom (8) in a manner known per se, which is arranged by a motor driven by the vehicle engine and on the chassis at the front or at least at a certain distance in front of the axis of rotation (2) of the collecting container (3) Pump (18) is driven via two lines (31 to 37 each) by means of a pressure medium, and that both the feed line (31 to 37) to the hydraulic motor (14) and the return line (31 to 37) from it to the pump (18 ) in the vicinity of the axes of rotation (2, 5) of the collecting container (3) and the lid (4) comparatively short flexible Has parts (35, 37) which are attached to a rigid part (33) arranged on the chassis (1) and a rigid part (34) extending in the collecting container (3) or to this rigid part (34) and one in the lid (4 ) connecting rigid part (36) of the respective line (31 to 37). 2. Machine according to claim 1 with water tanks for blasting the road, characterized in that the pressure medium tank is connected to the water tanks in a thermally conductive manner for cooling the pressure medium. Considered publications:
German Patent No. 855 123;
U.S. Patent Nos. 2,530,720, 2,228,411 . 1 sheet of drawings © 909 648/6 11.59