Comminution device

Abstract

The invention refers to a comminution device, such as for example a shredder (II) or the like for in particular large-size materials, with a main drive (I) generating a rotational movement for a shredder shaft (2), wherein the rotational speed of the shredder shaft (2) can be changed continuously by means of a gear interposed between main drive (I) and shredder (II), wherein as gear a planetary gear, in particular a planetary superposition gear (1), preferably a hydrostatic superposition gear is provided. The invention is characterized in that the hydraulic engine (4) as additional drive aggregate can be impinged in two different rotational directions.

Claims

1. A comminution device for large-size materials, with a main drive generating a rotational movement for a shredder shaft, wherein rotational speed of the shredder shaft can be changed continuously by means of a planetary gear interposed between the main drive and a shredder, wherein a hydraulic engine can be impinged as an additional drive aggregate in two different rotational directions to achieve a change of the rotational speed and a return movement of the shredder shaft can be generated.

2. The comminution device according to claim 1, wherein the main drive is a combustion engine with a performance of 130 to 500 kW and a rotational speed of 1,500 to 2,000 rotations per minute.

3. The comminution device according to claim 2, wherein the combustion engine is a diesel engine.

4. The comminution device according to claim 2, wherein the combustion engine has a performance of 315 kW.

5. The comminution device according to claim 1, wherein the main drive has a constant rotational speed.

6. The comminution device according to claim 1, wherein that the rotational speed of the main drive can be controlled.

7. The comminution device according to claim 6, wherein the rotational speed of the main drive can be controlled continuously.

8. The comminution device according to claim 1, wherein the planetary gear is a planetary superposition gear and the additional drive aggregate is provided for a superposition branch of a superposition gear at the planetary superposition gear.

9. The comminution device according to claim 8, wherein the superposition branch of the planetary superposition gear comprises a ring gear in which the additional drive aggregate engages.

10. The comminution device according to claim 8, wherein the superposition branch of the planetary superposition gear comprises a ring gear in which the additional drive aggregate engages and the ring gear interacts with at least one planetary wheel which again acts on a central wheel.

11. The comminution device according to claim 1, wherein a hydraulic pump is provided for providing the hydraulic engine with a drive medium.

12. The comminution device according to claim 1, wherein the rotational speed and/or the rotational direction of the hydraulic engine as additional drive aggregate can be controlled continuously by increasing or reducing the liquid flow of the drive medium.

13. The comminution device according to claim 1, wherein a hydraulic pump is driven by the main drive, or the hydraulic pump has its own pump drive.

14. The comminution device according to claim 1, wherein the rotational speed and/or the rotational direction of the hydraulic engine as additional drive aggregate changes because of the load of the comminution device, and the rotational speed of the comminution device controls itself depending on the required comminution performance.

15. The comminution device according to claim 1, wherein the hydraulic engine is configured and arranged such that it reacts by increasing or reduction of the pressure of the drive medium on changes of the torque when the load of the comminution device changes.

16. The comminution device according to claim 1, wherein the rotational direction of the comminution device can be changed by the different impingement of the hydraulic engine.

17. The comminution device according to claim 1, wherein an overload protection is provided monitoring the pressure of the drive medium and opening at a selected over pressure, wherein this over pressure is about 400 bar.

18. The comminution device according to claim 1, wherein the planetary superposition gear and/or the hydrostatic superposition gear is/are provided as startup control gear for the startup of the main drive under load.

19. The comminution device according to claim 1, wherein the planetary gear is a planetary superposition gear.

20. The comminution device according to claim 1, wherein the planetary gear is a hydraulic superposition gear.

21. The comminution device according to claim 1, wherein the main drive is an electric motor.

Description

(1) In the following, the invention is described further by means of examples. In the figures:

(2) FIGS. 1a and 1b Embodiment of a part of the comminution device according to the invention,

(3) FIG. 2 Schematic representation of the superposition gear for the comminution device according to the invention.

(4) FIGS. 1a and 1b show an embodiment of a part of the comminution device according to the invention, namely here a gear with hydraulic engine as well as the suitable shaft connections for connecting the main drive and the connection for the comminution device itself.

(5) Gear 1 is here, for example, a planetary superposition gear which is preferably a hydrostatic superposition gear. Reference number 3 indicates the shaft for connecting the main drive I. This is indicated only schematically by reference number I and an arrow. On the other side of the gear 1 there is a shredder shaft 2 serving for connecting a not-shown shredder II. This shredder II is indicated, also only schematically, with reference number II and an arrow. As it can be seen, on the right hand side of the view of FIG. 1a a hydraulic engine 4 is provided that can be seen in FIG. 1b only once in a front view.

(6) The construction of the gear for the comminution device according to the invention can be seen essentially in FIG. 2. FIG. 2 shows a graphic representation of an embodiment for the gear of the comminution device according to the invention. This is a normal graphic representation usual for gears. Reference number 1 again indicates the planetary superposition gear. This comprises (see FIG. 2, left hand side above) a superposition branch 11. The additional drive aggregate, here a hydraulic engine 4, engages in this superposition branch 11. The hydraulic engine 4 is fed by a hydraulic pump, not shown here, with the suitable drive medium, such as, for example, hydraulic oil. The superposition branch 11 of the planetary superposition gear 1 further comprises a ring gear 12 also shown schematically by a circle. The ring gear 12 interacts with a planet gear 13, which again acts on a central gear 14. Of course, it is also possible to employ several planet gears, as usual with planetary gears. However, for a schematic representation one planet gear 13 is sufficient here. The dashed arrows and/or continuous arrows at the ring gear 12, indicated by plus and minus, indicate the rotational speed of the ring gear 12.

(7) The arrows, dashed and/or continuous, at the hydraulic engine 4 indicate the rotational speed of the hydraulic motor containing additionally the denomination n.sub.I. Furthermore, plus and minus and n.sub.I indicate the range of the rotational speed of the step, in this case the first step. n.sub.1 refers to the rotational speed of the center gear. In the graphic representation, the capital letters Z.sub.H indicate ring gear, Z.sub.PL planet gear, and further below and/or in the center axis Z.sub.SO sun gear. On the right hand side, T.sub.1 indicates the torque of the main drive I, while below the rotational speed of the main drive is shown or indicated. T.sub.I and n.sub.I indicate, on the one hand, the torque of the hydraulic motor, and, on the other hand, the rotational speed of the oil engine. The rotational speed of the first step is also indicated at the arrow in direction i.sub.PI. As it can be seen, this can be found in plus as well as in the minus area. i.sub.PL also indicates that here several more steps of a planetary gear can be connected in series so that here even more favorable transmission ratios/torques can be achieved. What is not shown in the figures is the embodiment described further above whereupon a hydraulic pump is driven by the main drive I for feeding the hydraulic engine 4. The way of function of the comminution device according to the invention has been described sufficiently further above so that here a new presentation is not necessary.

(8) The invention has been described before by means of examples. The claims filed now and later on along with the application are attempted formulations without prejudice for obtaining a broader protection.

(9) References in the depending claims refer to the further configuration of the subject matter of the main claim by means of the characteristics of the respective sub-claim. However, these are not to be understood as a waiver for obtaining an independent subjective protection for the characteristics of the referred sub-claims.

(10) Characteristics, so far only disclosed in the description, can be claimed in the course of proceedings as being of essentially inventive relevance, for example to distinguish from the state of the art.