The invention relates to an earth working machine and to a method for wear-optimized operation of such an earth working machine. Provision is made in this context that machine parameters with which the earth working machine is operated are adapted, in consideration of material properties of the substrate to be worked, in such a way that favorable wear behavior exists for the earth working tools being used.

The present invention relates to a milling drum box unit, in particular a quick-change milling drum box unit, for mounting to a self-propelled base machine to obtain a ground milling machine, the milling drum box unit, in particular quick-change milling drum box unit, comprising an interior configured to receive a milling drum and open downward in vertical direction and having a front wall, a rear wall, a top wall and two opposing side walls, a part of a fastening device for mounting the milling drum box unit, in particular quick-change milling drum box unit, to the base machine, a connection point arranged inside the interior of the milling drum box unit, in particular quick-change milling drum box unit, and configured to receive and establish a drive connection to a milling drum rotatable about a rotation axis, on sides of each side wall a lateral shield height-adjustable relative to the side wall, at least two drive energy-consuming consumer elements and/or at least two sensors for detecting an operating parameter. The present invention further relates to a ground milling machine, comprising a base machine with a machine frame, an operator platform, a drive motor and travel units driven by the drive motor, a milling drum box unit, in particular a quick-change milling drum box unit, with a milling drum for milling ground material. The ground milling machine further has a detachable, in particular hydraulically, electrically, electromechanically or pneumatically detachable, fastening device with which the milling drum box unit, in particular quick-change milling drum box unit, can be detachably fastened to the base machine of the ground milling machine.

The present invention relates to a milling drum box unit, in particular a quick-change milling drum box unit, for mounting to a self-propelled base machine to obtain a ground milling machine, the milling drum box unit, in particular quick-change milling drum box unit, comprising an interior configured to receive a milling drum and open downward in vertical direction and having a front wall, a rear wall, a top wall and two opposing side walls, a part of a fastening device for mounting the milling drum box unit, in particular quick-change milling drum box unit, to the base machine, a connection point arranged inside the interior of the milling drum box unit, in particular quick-change milling drum box unit, and configured to receive and establish a drive connection to a milling drum rotatable about a rotation axis, on sides of each side wall a lateral shield height-adjustable relative to the side wall, at least two drive energy-consuming consumer elements and/or at least two sensors for detecting an operating parameter. The present invention further relates to a ground milling machine, comprising a base machine with a machine frame, an operator platform, a drive motor and travel units driven by the drive motor, a milling drum box unit, in particular a quick-change milling drum box unit, with a milling drum for milling ground material. The ground milling machine further has a detachable, in particular hydraulically, electrically, electromechanically or pneumatically detachable, fastening device with which the milling drum box unit, in particular quick-change milling drum box unit, can be detachably fastened to the base machine of the ground milling machine.

The self-propelled construction machine according to the invention, in particular road-milling machine, recycler, stabiliser or surface miner, comprises a machine frame 2, which is supported by a chassis 1, which has wheels or tracks 1A, 1B. A milling drum 4 is arranged on the machine frame. The wheels or tracks 1A, 1B and the milling drum 4 are driven by a drive unit 8. Furthermore, the construction machine comprises a control unit 19 for controlling the drive unit 8 and a signal-receiving unit 18 for detecting at least one measurement variable M(t) which is characteristic of an operating state of the milling drum 4. The construction machine is characterised in that the rotational speed of the milling drum 4 is adapted, on the basis of at least one measurement variable M(t) which is characteristic of a critical operating state of the milling drum, to the operating conditions of the construction machine in such a way that the milling drum is operated in a non-critical operating state. The adaptive open-loop control of the milling drum rotational speed allows the construction machine to be operated at an optimum operating point with respect to the milling drum rotational speed.

A rotatable cutting tool (10) includes a cutting tool body (12) having an axial forward end (14) and an axial rearward end (16). A bolster (46) at least partially received in a head portion (22) and includes a convex-shaped head portion (56) with a socket (20), a collar portion (58) and a tapered shank portion (60). The socket (20) is formed with a substantially planar side wall (20a), a bottom wall (20b), and a radius blend (20c). A hard tip or cutting insert (18) is at least partially received in the socket (20) of the bolster (46) and includes a convex-shaped conical head portion (72), a collar portion (74) and an axially-rearward portion (76) that generally conforms to the geometry of the socket (20) of the bolster (46). Between about sixty percent (60%) and about ninety percent (90%) of the cutting insert (18) is received in the socket (20) of the bolster (46), thereby reducing forces and stresses transmitted to the cutting tool (10) during a machining operation.

A cutting element including an arcuate base having a first side, a second side, an outer radial surface, and an inner radial surface, the inner radial surface being configured to be mounted to a cutting drum. The cutting element also includes a plurality of tooth holders being mounted to the outer radial surface of the arcuate base, the tooth holders being configured to receive cutting teeth. Additionally, the cutting element includes a cutting tooth mounted in each tooth holder, wherein there is at least one leading tooth, and at least one trailing tooth, each of the cutting teeth being configured to cut through a dissimilar cutting plane, wherein each dissimilar cutting plane is parallel to one another.

A cutting element including an arcuate base having a first side, a second side, an outer radial surface, and an inner radial surface, the inner radial surface being configured to be mounted to a cutting drum. The cutting element also includes a plurality of tooth holders being mounted to the outer radial surface of the arcuate base, the tooth holders being configured to receive cutting teeth. Additionally, the cutting element includes a cutting tooth mounted in each tooth holder, wherein there is at least one leading tooth, and at least one trailing tooth, each of the cutting teeth being configured to cut through a dissimilar cutting plane, wherein each dissimilar cutting plane is parallel to one another.

The invention relates to a milling machine having a replaceable milling drum, different types of milling drums being capable of being associated with the milling machine; and having a control unit for controlling the milling machine, machine parameters of the milling machine being settable by way of the control unit. Provision is made that the milling machine has associated with it at least one means that is designed to detect at least one characteristic feature of the milling drum; that the at least one means is connected to the control unit; and that the control unit is designed to specify for at least one machine parameter, indirectly or directly from the characteristic feature, a value to be set, and/or a setting range. The invention further relates to a corresponding milling drum and to a corresponding method. The milling machine, milling drum, and method allow the selection of machine parameters for operation of the milling machine to be simplified.

The invention relates to a milling machine having a replaceable milling drum, different types of milling drums being capable of being associated with the milling machine; and having a control unit for controlling the milling machine, machine parameters of the milling machine being settable by way of the control unit. Provision is made that the milling machine has associated with it at least one means that is designed to detect at least one characteristic feature of the milling drum; that the at least one means is connected to the control unit; and that the control unit is designed to specify for at least one machine parameter, indirectly or directly from the characteristic feature, a value to be set, and/or a setting range. The invention further relates to a corresponding milling drum and to a corresponding method. The milling machine, milling drum, and method allow the selection of machine parameters for operation of the milling machine to be simplified.

A ground breaking machine has a housing and the housing has oppositely disposed end plates which have aligned axial female openings and matching male plate portions positioned in the female openings. The female opening is defined by a side edge having top and oppositely disposed vertical spaced apart side edge portions. Each of the vertical side edge portions terminate in a laterally inwardly extending portion having an upperwardly extending hook portion engageable with a downwardly extending hook portion on the male plate portion for interlocking the female and male hook portions to prevent separation thereof and separation of the male plate portion in the female opening.

The method of assembly and mounting the cutter drum in the housing includes the steps of providing a housing having oppositely disposed end plates including aligned axial openings and matching male plate portions for being positioned in the female openings. The cutter drum has a gear drive mounted in an end of the cutter drum and is provided with a hydraulic motor on one of the male plate portions. The cutter drum is positioned under the housing and the male plate portion having the hydraulic motor is positioned in the female opening in an end plate. The hydraulic motor on the male plate portion is connected to the gear drive in the end of the cutter drum.