Sandvik Mining and Construction Patente

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A down the hole drilling assembly comprising: an elongate casing (15); a fluid powered piston (19) arranged moveably inside the casing (15) having a piston nose (24); a driver sub (34) provided with a set of axially extending driver sub splines (30) on its internal surface; a drill bit (14) comprising an elongate shank (29) provided with a set of axially extending shank splines (31) for engagement with the driver sub splines (29) to form a spline area (32); a guide sleeve (23) for forming a first seal (25) with the piston nose (24); wherein, the guide sleeve (23) forms a second seal with the outer surface of the shank (29) and there is at least one air passageway (55) extending through the guide sleeve (23) and / or the casing (15) for fluidly connecting the bottom chamber (22) to the spline area (32) to provide lubrication thereto.

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Towing arrangement for a battery-powered mining machine comprising a machine side (2) and a battery unit (1) connected removably to the machine side (2), the arrangement comprising: a hydraulic cylinder (11) arranged to the machine side (2) to release the brakes of the mining machine when activated; a towing element (3) arranged to move in relation to the battery unit (1) when a towing force is affecting to the towing element (3); and a mechanical connection means between the towing element (3) and the hydraulic cylinder (11), wherein the mechanical connection means are arranged to activate the hydraulic cylinder (11) for releasing the brakes when a towing force is affected to the towing element (3); wherein the mechanical connection means comprise at least one lever (8).

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A self-drilling rock bolt (1) for drilling a drill hole (2) in a material to be drilled (3) using a percussive rock drill and reinforcing the material surrounding the drill hole is provided. The rock bolt (1) comprises drilling means (4), a rock bolt body (5) for bolting the drill hole, an end anchor element (9) provided at the drilling end (7) of the rock bolt provided with anchor means for engaging with the material of the drill hole walls, and an impact absorber (26) arranged between the rock bolt body and the end anchor element to dampen the impact from percussive drilling.

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According to an example aspect of the present invention, there is provided a method for determining the state of health of a battery by monitoring charging of the battery over multiple charging instances. The method is implemented within charging stations by, recognizing the battery via a unique identifier; charging the battery; monitoring conditions of the battery during charging, storing data related to the current charging instance based at least partially on the monitored conditions; retrieving data related to at least one earlier charging instance of the uniquely identified battery; and making a determination of the uniquely identified battery's state of health based at least partially on a comparison of the data related to the current charging instance and the retrieved data related to at least one earlier charging instance.

A piston guiding element, rock drilling machine and method for supporting a front end portion of a percussion piston of a rock drilling machine. The element (20) comprises a braking recess (16) at its rear end (24). The element further comprises at least one bearing sleeve (29) which is provided with two axially successive slide bearing sections (AS1, As2). Hydraulic fluid is conveyed between the slide bearing sections via a feed system (21).

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According to an example aspect of the present invention, there is provided a method, comprising: receiving, during a first action of an automatic adaptive loading procedure by a work machine equipped with a boom and a bucket connected to the boom, driveline information of at least one driveline component of the work machine, defining a set of control parameters on the basis of the received driveline information, and controlling position of the boom, position of the bucket, and speed of the work machine on the basis of the defined set of control parameters during a second action of the automatic adaptive loading procedure.

According to an example aspect of the present invention, there is provided a method, comprising: detecting (200) the work machine comprising an electric driveline (300), a boom (14), and a bucket (16) connected to the boom to enter a bucket loading mode, and initiating (210) a bucket loading specific traction control procedure in response to detecting the work machine to enter the bucket loading mode. The procedure comprises detecting (230) a wheel slip condition during the bucket loading mode on the basis of driveline information and at least one slip condition threshold value preconfigured for the bucket loading mode, and defining (240) a bucket loading specific traction control parameter set in response to the detected slip condition.

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An apparatus and method for designing a blasting sequence for a drilling pattern of a round. The apparatus (11) is configured to assist selecting one or more drill holes (3) for each time delay of the blast. The apparatus calculates burst volume (V_B) for the selected drill hole set (34) and ensures that previously blasted free volume (V_F) can receive it when being fired. The apparatus may also take into account burst angles, burst distances and ground vibrations when suggesting the drill hole sets.

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A hydraulic damping device comprising a housing (2) having a cylinder space (3) defined by a cylindrical inner wall (4) of the housing, a piston (7) arranged movably in the cylinder space (3), a piston rod (8) arranged to the piston (7) and extending to the outside of the housing (2), means for moving the piston (7) from a first position, in which the piston rod (8) is in a retracted position, to the second position, in which the piston rod (8) is in an extended position, and a fluid tank (20) operationally connected via fluid channel (19) to the cylinder space (3). The damping device (1) is configured to damp a movement of the piston (7) and the piston rod (8) from the extended position of the piston rod (8) to the retracted position of the piston rod (8) achieved by an external force directed to the piston rod (8), wherein a fluid flow is achieved by pressing the fluid with the piston (7) from the cylinder space (3) to the fluid tank (20) via the fluid channel (19), and the device comprises means for returning the piston (7) to the extended position of the piston rod (8) when the external force is not directed to the piston rod. The invention relates also to a hinge arrangement and a machine.

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