SE537746C2 - Crankshaft and method of manufacturing a crankshaft - Google Patents

Abstract

The present invention relates to a crankshaft (4) with a center shaft (A), the crankshaft (4) comprising at least two frame bearing pins (12), through which the center shaft (A) extends, and at least one crank hose (10) arranged between the frame bearing pins (12), used in the at least one crank hose (10) comprises two crank discs (14, 14a, 14b) connected to each other by a crank pin (16). At least one crank disc (14) has a recess (26) with a flat bottom surface (28), which is substantially perpendicular to the extension of the center axis (A), used in the recess (26) so formed of the at least one crank disc (14, 14a, 14b) that the center axis (A) intersects the flat bottom surface (28). The present invention also relates to a method of manufacturing such a crankshaft (4).

Description

BACKGROUND OF THE INVENTION The present invention relates to a crankshaft, a method of manufacturing such a crankshaft, an internal combustion engine comprising such a crankshaft and a vehicle comprising such an internal combustion engine.

BACKGROUND OF THE INVENTION AND PRIOR ART A piston engine, such as an internal combustion engine, comprises a crankshaft, which converts the tram and reciprocating motion has one or more pistons and thus connecting rods has the motor, into a rotating motion has the crankshaft, or vice versa. The crankshaft comprises one or more crank hoses, each of which is connected to at least one connecting rod has a cylinder has the engine. A six-cylinder piston engine, for example, can thus have a crankshaft with six crank hoses. Each crank hose comprises two crank discs, which are connected to each other by a crank pin. The piston is connected to the crank pin via the connecting rod. If each crank pin has a crank bearing, such as a sliding bearing, at which the connecting rod rotates. Between each crank hose, the crankshaft has frame bearing pins, which are arranged coaxially with the center axis of the crankshaft, around which the crankshaft rotates. The frame bearing pins have frame bearings which are arranged in connection with the crankcase in which the crankshaft is arranged. The crankshaft rotates at the frame bearings, which thereby absorb the forces that arise between the crankshaft and the crankcase. Usually there is a frame bearing pin comprising a frame bearing in each end of the crankshaft, and between each crank hose.

In order to reduce fuel consumption, for example, efforts are being made today to minimize the weight of vehicles. Thus, it is also desirable to manufacture as light engines as possible. Various ways of reducing the weight of an engine by reducing the weight of the crankshaft have been proposed in the prior art. Document US20120024105 A1 describes a method for manufacturing a light crankshaft, the crankshaft vane is formed with recesses and slides in its crankpins. However, this method is time consuming as slippage and recesses are obtained by forging and punching. Similar documents DE4325722 A1 describe how a crankshaft is designed with recesses in its crankpins, in order to reduce the weight.

SUMMARY OF THE INVENTION Despite known solutions in the art, there is still a need to further develop a lightweight crankshaft and a method of making a lightweight crankshaft that is simple and cost effective.

An object of the present invention is to provide a crankshaft which has a reduced weight.

A further object of the present invention is to provide a crankshaft which exhibits good IA and torsional strength.

A further object of the present invention is to provide a crankshaft which facilitates drilling of slip through the crankshaft.

A further object of the present invention is to provide a method of manufacturing a crankshaft which is simple, time efficient and cost effective.

Another object of the present invention is to provide a method of manufacturing a crankshaft which imparts good precision and accuracy and which minimizes the need for post-machining and balancing.

These objects are achieved with a crankshaft according to claim 1 and by a method of manufacturing a crankshaft according to claim 8. These objects are also achieved with an internal combustion engine comprising such a crankshaft according to claim 6 2 and with a vehicle comprising such an internal combustion engine according to claim 7. .

According to one aspect of the present invention, there is provided a crankshaft having a center shaft, the crankshaft shaft comprises at least two frame bearing pins and at least one crank hose disposed between the frame bearing pins, the crankshaft hose comprising has a recess with a flat bottom surface which is substantially perpendicular to the extent of the center axis, used in the recess being so shaped that the at least one crank plate has that the center axis intersects the flat bottom surface. The center axis will thus form the normal to the bottom surface of the recess.

By designing at least one crank plate with a recess with a flat bottom surface, so that the center axis intersects the flat bottom surface, a crankshaft is provided which is suitable for, and facilitates, drilling of so-called slatted halls. Latthal is slippery, which is designed to have a detail in order to reduce the weight of the detail. Furthermore, a reduction of the weight of the at least one crank disc, and thus the crankshaft, is achieved through the recess. Because the recess is designed at the at least one crank plate, so that the center axis of the crankshaft intersects the flat bottom surface of the recess, the recess does not affect the balancing of the crankshaft. In such a way that an imbalance does not arise due to the recess and thus similar recesses can be formed in how many or how few crank discs are lifted.

The recess is preferably designed so that it has at least one crank plate that the IA and rotational resistance of the crankshaft, and thus the crankshaft, can be maintained.

Preferably, all the crank discs of the crankshaft have a recess with a flat bottom surface. In this way, the weight of the crankshaft is further reduced. Preferably, at least one crankshaft having the crankshaft has a counterweight. If the counterweight is slippery, a drill can be drilled to balance the crankshaft. Lamply, a plurality of crankshafts have a counterweight.

Preferably, the crank pin has the at least one crank hose having a crank bearing. Lamply, all crank pins have the crankshaft bearing bearings. Furthermore, the at least two frame bearing pins preferably have frame bearings, at which the crankshaft rotates about the center axis. Lamply, all frame bearing pins have the crankshaft frame bearing.

Lamply, at least one frame bearing pin has a slide which extends substantially coaxially with the center axis. The tail can be called a lathe.

Today, it is an edge to design slides and recesses have crankshafts to reduce the weight of the crankshaft, for example by drilling slides in the crank pins. By designing at least one frame bearing pin with a slide which extends in a direction along the extent of the center axis, a reduction of the weight of the crankshaft is achieved. Preferably, a plurality of frame bearing pins, or all frame bearing pins having the crankshaft, are slid substantially coaxial with the center axis. Pa sá satt astadkoms en 'au vevaxel. The advantage of a crankshaft of low weight is, among other things, that the weight is reduced in the vehicle in which the internal combustion engine with said crankshaft is arranged. This reduces the vehicle's fuel consumption. Because the tail / tail is designed substantially coaxially with the center axis, they do not affect the balance of the crankshaft.

Preferably, the at least one crank plate has a hall which extends substantially coaxially with the center axis through the flat bottom surface of the recess. Lamply, the tail extends has the at least one frame bearing pin through the at least one crank plate and the flat bottom surface has the recess has the at least one crank plate. The bottom surface of the recess preferably has a shape and area which substantially exceeds the cross-sectional shape and cross-sectional area of the tail. In this case, the bottom surface of the recess preferably occupies an area of the at least one crank plate, which accommodates the entire cross-sectional area of the tail.

The at least one frame bearing pin and / or the at least one crankshaft is drilled by drilling coaxially with the center shaft.

In cases where it is undesirable to drill slippery in several or all frame bearing pins has a crankshaft, it is also customary to drill through the crank hose or tubes which are arranged between each frame bearing pin. In cases where the slide is to be drilled through a number of frame bearing pins and crank hoses, a long drill is required, which thus becomes weak and unstable. Furthermore, drilling through several frame bearing pins and at least one crank hose means that the needles between the crank hose crankshafts will not drill through any goods. The viii saga, the needles will periodically pass through the space between the crank of the crank hose. The bar will thus intermittently hit a new surface having a subsequent crank. Crank discs are today designed with different chamfers and levels and have oblique surfaces where the center axis intersects the crank discs. When drilling slippery material, substantially coaxially with the center axis, through a plurality of frame bearing pins, the surface which the needles intermittently strikes would be oblique or uneven. Thus, the entrance and / or exit of the needles would have the crank discs have an oblique surface. This can cause the drilled tail to become crooked and can even lead to increased friction, wear or even ha-y in of the needles. In the case of further drilling, there is also a risk that the subsequent slippage will become more and more skewed. Inclined slippery shaft frame bearing pins and crank hoses lead to an imbalance of the crankshaft, which in turn entails an increased need for balancing the crankshaft. If the needles drill obliquely and pass the surface at an oblique angle, the appearance of burrs also increases, which entails an increased need for finishing. By designing recesses with a flat bottom surface which is substantially perpendicular to the extent of the center axis, so that the center axis intersects the flat bottom surface, has at least one crank plate, the drilling of slippage through that crank plate is facilitated. The flat bottom surface has the recess thus constitutes the surface through which the needles are drilled, in which case the slippery surface must be drilled through two or more frame bearing pins. Because the bottom surface of the recess is flat and substantially perpendicular to the extent of the center axis, the drilling process of the frame bearing pins has the crankshaft facilitated and the risk of the drilled tail becoming oblique is minimized.

Preferably, the crankshaft comprises six crank hoses. The crankshaft thus suitably comprises seven frame bearing pins, a frame bearing pin being arranged at each end of the crankshaft and a frame bearing pin being arranged between each crank hose. The crankshaft is preferably adapted for an engine with six cylinders. Lamply, all twelve crank discs have recesses with a flat bottom surface, which is substantially perpendicular to the extension of the center axis, the vane in the recess is designed such that the center axis intersects the flat bottom surface. Lamply, all twelve crank discs and seven frame bearing pins have a slippery surface which extends coaxially with the center axis.

The crankshaft can be adapted for a straight engine with three, four, five or six cylinders, and thus comprises three, four, four or six crank hoses. Alternatively, the crankshaft can be adapted for a so-called V-engine with six, eight or twelve cylinders, and thus comprises three, four or six crank hoses.

Preferably, at least one frame bearing pin having the crankshaft includes an oil line hall for oil supply. The oil line tail is suitably connected in connection with the crank pin and has a crank hose arranged next to the at least one frame bearing pin. Having the at least one frame bearing pin coaxially provided with the center shaft is preferably designed to be separate from the oil line tail.

Lampingly, sealing means are provided at each end of the crankshaft. Since a frame bearing pin at the crankshaft end has a slippage for weight reduction, dirt can penetrate into the frame bearing pin. By arranging a seal at the end of the crankshaft, the risk of dirt penetrating into the frame bearing pin is minimized. Furthermore, the lubrication means that lubricant does not paint out of the crankcase through the tail of the frame bearing pin. According to one aspect of the present invention, there is provided a method of manufacturing a crankshaft having a center axis, the crankshaft vane comprising at least two frame bearing pins and at least one crank hose disposed between the frame bearing pins, through a crank pin. The method suitably comprises the step of forming a recess with a flat bottom surface, which is substantially perpendicular to the center axis, of at least one crank disc, used in the recess being designed so that the center axis intersects the flat bottom surface.

The recess is preferably formed by providing a crankshaft forging tool comprising two tool halves, the vane of one tool half being formed with at least one projection. A raw material is applied between the ram tool halves and the tool halves are compressed so that the at least one projection has one tool half forming the recess has the at least one crank plate has the crankshaft. The frame material in which the crankshaft is manufactured is probably made of wrought iron. Preferably, the tool halves are designed with a clearance angle. Thus, the bottom surface of the shaped recess may need to be reworked, so that the bottom surface becomes flat and substantially perpendicular to the center axis.

By forging the crankshaft in one piece and forming the recess in the forging having the at least one crankshaft, a method is provided for manufacturing a crankshaft which is simple, time-efficient and cost-effective. Furthermore, a crankshaft is provided which has good half-strength. The projection has one tool half suitably has a shape corresponding to the recess with the flat bottom surface. When the tool halves are pressed together, the projection thus pushes away raw material and the recess is formed. Forging is preferably done in two steps, in accordance with prior art. After forging, the crankshaft is suitably machined.

By using a crankshaft forging tool, which comprises two tool halves, a joint is obtained between the tool halves, a so-called part line. At the joint, the raw material can be pressed out, which entails the need for finishing to remove excess material. During the finishing, the area at the part line acquires a somewhat mixed surface finish. The area around the party line is also allowed to show larger carpet deviations. Because the recess of the at least one crank disc is provided by means of a projection, one of the tool halves ensures that the recess is formed at the crank disc at a position separating the joint between the tool halves. This provides a committee with a flat bottom surface, which shows a good surface finish.

The crankshaft forging tool is preferably designed with a plurality of projections, so that the projections form recesses with a flat bottom surface of a plurality of crank discs when compressing the tool halves. Lamply, only one half of the tool has projections. Alternatively, the ram halves of the tool have projections. Preferably, the tool halves are designed with a slack angle to the forging direction.

Alternatively, the recess is formed by casting the crankshaft, by means of a crankshaft mold, which comprises at least one projection, which during casting forms the recess of the at least one crank disc of the crankshaft. When casting, raw material is supplied to the crankshaft mold via an opening in the mold. The crankshaft mold is suitably made of a sand mold. In the case where the recess is formed with a clearance angle during casting, the bottom surface of the shaped recess is finished, so that the bottom surface becomes flat and substantially perpendicular to the center axis.

Alternatively, the recess is formed by first forging the crankshaft by means of a crankshaft forging tool and subsequently forming the recess having the flat bottom surface having the at least one crank plate, by means of cutting machining. By cutting processing can be meant, for example, drilling, turning, planing, chiseling, filing or milling.

Preferably, the method further comprises drilling a hollow coaxially with the center axis through at least one frame bearing pin and the recess having at least one crank disc, so that the drilled hale extends through the flat bottom surface of the recess. The drilled tail is suitably designed so that its cross-sectional area fits within the bottom surface of the recess.

Lamply, the method of drilling a slide coaxially with the center shaft through a plurality of frame bearing pins and crank hoses includes the crankshaft.

The drilling is suitably performed starting from one end of the crankshaft in the direction of the other end. Alternatively, the drilling is performed starting from the ram ducks having the crankshaft, in the direction of the respective opposing spirit.

By drilling slippery through one or more frame bearing pins and at least one crank plate, the weight of the crankshaft is reduced. Because the at least one crank plate has a recess with a flat bottom surface, which is substantially angled to the extent of the center axis, the drilling is facilitated through the at least one crank plate.

Preferably, drilling is performed through a plurality of frame bearing pins and crank discs, all of said plurality of crank discs having recesses with a flat bottom surface.

The needles will then intermittently hit the flat bottom surface of the respective crank disc, which means that the risk of the tail becoming skewed is minimized. Furthermore, drilling wear and the occurrence of burrs are minimized.

The method includes the process of post-machining the crankshaft and balancing the crankshaft. Balancing of the crankshaft can be accomplished by drilling slippery in one or more crank discs. Alternatively, the balancing can be accomplished by adding material having one or more crank discs.

The crankshaft according to the present invention can be arranged with a motor, which can be used, for example, as an industrial motor, in motor-driven industrial robots or in various types of power plants, such as an electric power plant comprising a diesel generator. Additional objects, advantages, and novel features of the present invention will become apparent to those skilled in the art from the following details, as well as through reference to the invention. While the invention has been described below, it is to be understood that the invention is not limited to the specific details described. Those skilled in the art having access to the teachings will recognize additional applications, modifications, and incorporations within other fields which are within the scope of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS In the following, as an example, preferred embodiments of the invention are described with reference to the accompanying drawings, in which: Fig. 1 shows a schematic side view of a vehicle; Fig. 2 schematically shows a crankshaft according to an embodiment of the present invention; Fig. 3 schematically shows two crank discs according to an embodiment of the present invention; Fig. 4 schematically shows a crankshaft forging tool for providing a crankshaft according to an embodiment of the present invention; Fig. 4b schematically shows a crankshaft mold for providing a crankshaft according to an embodiment of the present invention; Fig. 5 shows a flow chart of a method of manufacturing a crankshaft, according to an embodiment of the present invention; and Fig. 5b shows a flow chart of a method of manufacturing a crankshaft, according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION In the drawings, for the sake of clarity, certain reference numerals have been omitted for details which appear several times in one and the same figure and / or in several different figures.

Figure 1 shows a schematic side view of a vehicle 1. The vehicle 1 comprises an internal combustion engine 2, which comprises a crankshaft 4 according to the present invention. The internal combustion engine 2 is connected via the crankshaft 4 to a gearbox 6, which is connected to the vehicle's drive wheel 8 via a transmission. Vehicle 1 can be a heavy vehicle, such as a truck, bus, wheel loader, forestry machine, dump truck, mining machine, tracked vehicle or tank. Vehicle 1 can alternatively be a car.

Figure 2 schematically shows a crankshaft 4 according to an embodiment of the present invention. The crankshaft 4 comprises six crank hoses 10 arranged next to each other along a center axis A, around which the crankshaft 4 rotates. Two crank hoses 10 arranged next to each other can be rotated about the center axis A in relation to each other. For example, two adjacent crank hoses 10 may be rotated 120 degrees about the center axis A in relation to each other. In the following, the invention is described in connection with a crankshaft with such an inboard rotation of crank hoses 10. The crankshaft 4 has a frame bearing pin 12 in each end, and a frame bearing pin 12 between each crank hose 10. Each crank hose 10 comprises two crank discs 14, which are connected to each other through a crank pin 16. The crank pin 16 has each crank hose 10 is parallel to, and separated from, the center axis A. Around each crank pin 16 is arranged a crank bearing 18 in the form of a sliding bearing, at which the combustion engine 2 crankshafts (not shown) are mounted. Arranged around each frame bearing pin 12 is a frame bearing 20, at which the crankshaft 4 is mounted in the engine block (not shown). The crank hoses 10 may comprise crank plates 14 with counterweights 22, in order to counteract imbalance of the crankshaft 4. Furthermore, the crank pins 16 and the frame bearing pins 12 have an oil line hall 24 for supplying oil and thus lubrication. The crank discs 14 have recesses 26 with a flat bottom surface 28 (see Fig. 3). The recesses 26 of the crank discs 14 have a crank hose 10, are designed so that they face each other. That is, the recesses 26 are formed having the side of a crank plate 14 facing the second crank plate 14 in the same crank hose 10. The recesses are described in more detail in Fig. 3.

Figure 3 schematically shows a crank plate 14a without counterweight 22 and a crank plate 14b with counterweight 22 according to an embodiment of the present invention. The crank discs 14a, 14b each have a recess 26 with a flat bottom surface 28, which is substantially perpendicular to the extent of the center axis A. The recesses 26 are formed with the crank discs 14a, 14b, so that the center axis A intersects the flat bottom surface 28 with the recess 26. The crank discs 14a, 14b have a slider 30, extending substantially coaxially with the center axis A through the respective flat bottom surface 28 and through the respective crank disc 14a. , 14b. The tail 30 has the crank plate 14a without counterweight 22 extends through the entire crank plate 14a and further through the frame bearing pin 12 arranged in connection with the crank plate 14a. The shark 30 has a respective crank plate 14a, 14b, is suitably designed so that its cross-sectional area is accommodated with the bottom surface 28 of the respective recess 26. At the crank plate 14a without counterweight, a crank pin 16 cut in the figure is also shown, having an oil line hall 24.

Figure 4a shows a crankshaft forging tool 40 for providing a crankshaft 4 according to an embodiment of the present invention. The crankshaft forging tool comprises two tool halves 42, 44 of which one tool half 44 has at least one projection 46. In the manufacture of a crankshaft 4 by forging, the frame material 48, such as forging steel, is placed between the tool halves 42, 44. The tool halves 48 the design of the tool halves 42, 44. The method of manufacturing the crankshaft 4 by means of the crankshaft forging tool 40 is further described below, with reference to Figure 5b. The at least one projection 46 has one tool half 12 44 is designed so as to cause a recess 26 to be provided on at least one crank plate 14 of the crankshaft 4. Furthermore, the projection 46 is designed so that the shaped recess 26 has a flat bottom surface 28 substantially perpendicular to the extent of the center axis A of the crankshaft 4, and said that the center axis A intersects the flat bottom surface 28 with the shaped recess 26. Thus, the center axis A will form a normal to the flat bottom surface 28 of the recess 26.

Figure 4b shows a crankshaft mold 50 for providing a crankshaft 4 according to an embodiment of the present invention. The crankshaft mold 50 comprises an opening 52 and a hollow 54, whereby raw material is supplied to the crankshaft mold via the opening 52 into the hollow 54. designed so that the shaped recess 26 has a flat bottom surface 28 substantially perpendicular to the extent of the center axis A of the crankshaft 4, and so that the center axis A intersects the flat bottom surface 28 with the shaped recess 26 (see also Fig. 5b).

Figure 5a shows a flow chart of a method of manufacturing a crankshaft 4, according to an embodiment of the present invention. The flow chart shows a method for manufacturing a crankshaft 4 with a center axis A, vane in the crankshaft 4 comprises at least two frame bearing pins 12 and at least one crank hose 10 arranged between the frame bearing pins 12, van in the at least one crank hose 10 crank pin 16. The method comprises the step a) of forming a recess 26 with a flat bottom surface 28, which is substantially perpendicular to the center axis A, has at least one crank plate 14, used in the recess 26 is designed so that the center axis A intersects the flat bottom surface 28 The recess 26 can be formed by various manufacturing methods, some examples of which are described in Fig. 5b.

Figure 5b shows a flow chart of a method of manufacturing a crankshaft 4 with a center shaft A, used in the crankshaft 4 comprising at least two frame bearing pins 12 and at least one crank hose 10 arranged between the frame bearing pins 12, 13 used in the at least one crank hose 10 connected to each other by a crank pin 16.

The method may comprise step b) providing a crankshaft forging tool 40 comprising two tool halves 42, 44 (see Fig. 4a), used in one tool half 44 being formed with at least one projection 46. After step b) step c) is performed to apply a raw material 48 between the ram tool halves 42, 44 and then step d) to compress the tool halves 42, 44 so that the projection 46 forms a recess 26 has at least one crank plate 14 has the crankshaft 4.

The recess 26 having a flat bottom surface 28 which is substantially perpendicular to the center axis A, and the recess 26 being designed so that the center axis A of the crankshaft 4 intersects the flat bottom surface 28. In case the tool halves 42, 44 are formed with a clearance angle, the shaped recess 26 bottom surface 28 may need to be reworked so that the bottom surface 28 becomes flat and substantially perpendicular to the center axis A.

Alternatively, the method comprises step e) of casting the crankshaft 4, by means of a crankshaft mold 50 (see Fig. 4b), which comprises at least one projection 56, which during casting forms a recess 26 having at least one crank plate 14 having the crankshaft 4.

The recess 26 having a flat bottom surface 28 which is substantially perpendicular to the center axis A, and the recess 26 being designed so that the center axis A of the crankshaft 4 intersects the flat bottom surface 28. If the recess 26 is formed with a clearance angle during casting, the bottom surface 26 28, so that the bottom surface 28 becomes flat and substantially perpendicular to the center axis A.

Alternatively, the method comprises the steps f) forging the crankshaft 4 by means of a crankshaft forging tool, and the step g) for forming a recess 26 having at least one crankshaft 14 having the crankshaft 4, by means of cutting machining. The recess 26 has a flat bottom surface 28, which is substantially perpendicular to the center axis A, and the recess 26 is designed so that the center axis A of the crankshaft 4 intersects the 14 flat bottom surface 28. By cutting processing can be meant, for example, drilling, turning, planing, chiseling, filing or milling.

After step d), e) or f), step h) is performed to drill a hole 30 which extends substantially coaxially with the center axis A, through at least one frame bearing pin 12 and the at least one crank plate 14 having the recess 26, so that the drilled tail 30 extends through the flat bottom surface 28. By drilling a slide 30 through at least one frame bearing pin 12 and the at least one crank plate 14, a reduction of the weight of the crankshaft 4 is achieved. Because the recess 26 has a flat bottom surface 28, substantially perpendicular to the center axis A, the risk of the drilled tail 30 becoming oblique at the same time as the wear of the needles is minimized is minimized. Furthermore, the need for post-processing is reduced as the occurrence of degrees is minimized. The bottom surface 28 of the recess 26 preferably has a shape and area which substantially exceeds the cross-sectional shape and cross-sectional area of the tail 30 or bore. That is to say, the bottom surface 28 of the recess 26 occupies an area has the at least one crank plate 14, which accommodates the cross-sectional area of the entire tail 30. After step h), the procedure is terminated.

The foregoing description of the preferred embodiments of the present invention has been provided for the purpose of illustrating and describing the invention. It is not intended to be exhaustive or to limit the invention to the variations described. Obviously, many modifications and variations will occur to those skilled in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, and thus make it possible for a person skilled in the art to understand the invention for different embodiments and with the various modifications which are suitable for the intended use. The specified components and features stated herein can be combined within the scope of the invention between different specified embodiments.

Claims (14)

PATE NTKRAV Crankshaft (4) with a center shaft (A), used in the crankshaft (4), comprises at least two frame bearing pins (12), through which the center shaft (A) projects, and at least one crank hose (10) arranged between the frame bearing pins (12) ), used in the at least one crank hose (10) comprises two crank discs (14) connected to each other by a crank pin (16), used in at least one crank disc (14, 14a, 14b) having a recess (26) with a flat bottom surface (28), used in the recess (26) is so formed with the at least one crank plate (14, 14a, 14b) off the center axis (A) intersecting the flat bottom surface (28) which may be marked by the fact that the flat bottom surface (28) is substantially perpendicular to the extension of the center shaft (A), used in at least one frame bearing pin (12), has a slide (30) which extends substantially coaxially with the center shaft (A), and used in the at least one crank plate (14, 14a, 14b) has a slide (30) extending substantially coaxially with the center axis (A) through the flat bottom surface (28) of the recess (26). Crankshaft according to claim 1, used in the recess (26) is formed on one side of the at least one crank disc (14), which faces the other crank disc (14) of the same crank hose (10). Crankshaft according to one of the preceding claims, the crankshaft shaft (4) comprises six crank hoses (10). Crankshaft according to claim 3, used in all crank discs (14), comprises a recess (26) with a flat bottom surface (28), which is substantially perpendicular to the extension of the center axis (A), the recess in the recess (26) is formed so that the center axis ( A) cuts the flat bottom surface (28). Crankshaft according to claim 4, used in all the crank discs (14a, 14b) and frame bearing pins have a slide (30) which projects substantially coaxially with the center axis (A). 16 Crankshaft according to one of Claims 3 to 5, used in TV5 next to one another, crank hoses (10) are rotated about the center axis (A) in relation to one another. Crankshaft according to any one of the preceding claims, vane of sealing means are arranged at each spirit of the crankshaft (4). Internal combustion engine (2) comprising a crankshaft (4) according to any one of claims 1-7. Vehicle (1) comprising an internal combustion engine (2) according to claim 8. A method of manufacturing a crankshaft (4) with a center shaft (A), used in the crankshaft (4), comprises at least two frame bearing pins (12), through which the center shaft (A) extends, and at least one crank hose (10) arranged between the frame bearing pins (12), used in the at least one crank hose (10) comprises two crank discs (14) connected to each other by a crank pin (16), characterized by the steps all of: a) forming a recess (26) with a flat bottom surface ( 28), which is substantially perpendicular to the center axis (A), has at least one crank plate (14, 14a, 14b), the vane recess (26) is designed so that the center axis (A) intersects the flat bottom surface (28), and h) drill a hole (30), substantially coaxial with the center axis (A), through at least one frame bearing pin (12) and the at least one crank plate (14, 14a, 14b) having the recess (26), so that all the drilled tail (30) stretches through the flat bottom surface (28) of the recess (26). A method according to claim 10, wherein the recess (26) is formed by the steps of: b) providing any crankshaft forging tool (40) comprising two tool halves (42, 44), used in one tool half (42, 44) formed with at least a committee (46); C) applying a raw material (48) between the ram tool halves (42, 44); and aft d) compressing the tool halves (42, 44), s'A aft the projection (46) forming the recess (26) of the at least one crankshaft (14, 14a, 14b) of the crankshaft (4). A method according to claim 10, wherein the recess (26) is formed by the step of: e) casting the crankshaft (4), by means of a crankshaft mold (50), comprising at least one projection (56), which during casting forms the recess (26) of the at least one crank disc (14, 14a, 14b) of the crankshaft (4). A method according to claim 10, wherein the recess (26) is formed by the steps of: f) forging the crankshaft (4) by means of a crankshaft forging tool; and aft g) forming the recess (26) of the at least one crank disc (14, 14a, 14b) of the crankshaft (4), by means of cutting machining. A method according to any one of claims 10 to 13, wherein step h) comprises drilling an MI (30), substantially coaxial with the center axis (A), through all the frame bearing pins (12) and all the crankshafts (14, 14a, 14b) of the crankshaft (4). 18 1 / 1- 2 / N (NI 3 / a co 4/48 (46 44 i ------ ///////////