DE102019105462A1 - Camshaft, motor vehicle and method of assembling a camshaft - Google Patents

Abstract

The present invention relates to a camshaft (10) with a base shaft (11) and at least one sliding cam element (12) which is arranged axially displaceably on the base shaft (11), and at least one locking device (13), the base shaft (11) and the sliding cam element (12) each have an associated through opening (14, 15) through which the locking device (13) is introduced into the basic shaft (11), the through opening (14) of the basic shaft (11) and the through opening (15) of the Sliding cam element (12) are rotated relative to one another, so that the locking device (13) is radially secured, in particular held, by the sliding cam element (12) in the base shaft (11). The invention also relates to a camshaft and an assembly method.

Description

The invention relates to a camshaft, a motor vehicle and a method for assembling a camshaft. A camshaft according to the preamble of claim 1 is, for example, from DE 10 2013 010 330 A1 known.

Sliding camshafts are generally used for variable valve control in internal combustion engines. The sliding cams are arranged on the camshaft so that they can be displaced along the longitudinal axis. The axial adjustment of the sliding cams is essentially carried out by actuators that interact with a shift gate of the sliding cams. In order to fix the sliding cams after an adjustment at the corresponding axial positions on the camshaft, locking devices are usually used.

Such locking devices are often retrofitted into the camshafts during the assembly process. From the aforementioned DE 10 2013 010 330 A1 For example, a camshaft with a base shaft and a cam carrier is known, which is arranged displaceably on the base shaft. The base shaft and the cam carrier have teeth that mesh with one another for a non-rotatable connection. The camshaft further comprises a latching device which is pushed into the base shaft through an assembly opening in the cam carrier and a receiving opening in the latter. The camshaft is arranged in a cylinder head cover when the locking device is installed. In order to prevent the locking device from being lost through the assembly opening during operation, a retaining disk is provided.

The disadvantage here is that an additional component is required for the radial securing of the locking device by the retaining disk. This increases manufacturing costs and the handling of several individual parts makes assembly of the locking device more difficult. Furthermore, due to the non-rotatable connection between the base shaft and the cam carrier, only a small angular range is available between a cam tip of the cam carrier and the locking device in order to arrange the locking device in the base shaft. This has the disadvantage of restricting the freedom of design.

The invention is therefore based on the object of specifying a camshaft in which assembly is facilitated by a simplified structure and overall costs are reduced. The invention is also based on the object of specifying a motor vehicle and a method for assembling a camshaft.

According to the invention, this object is achieved with regard to the camshaft by the subject matter of claim 1. With regard to the motor vehicle and the method, the aforementioned object is achieved by the subject matter of claim 12 (motor vehicle) and claim 13 (method).

Specifically, the object is achieved by a camshaft with a base shaft and at least one sliding cam element, which is arranged axially displaceably on the base shaft, and at least one locking device. The base shaft and the sliding cam element each have an associated through opening through which the locking device is introduced into the base shaft. The through opening of the basic shaft and the through opening of the sliding cam element are rotated relative to one another, so that the locking device is radially secured, in particular held, in the basic shaft by the sliding cam element.

The invention has several advantages. When the camshaft is installed, the locking device can be mounted, for example, in a closed bearing lane of a cylinder head cover, through the through openings of the base shaft and the sliding cam element. During assembly, the locking device is introduced through the through openings and secured radially by the relative rotation of the through openings in the base shaft. In other words, the locking device is limited radially to the outside by the sliding cam element for securing purposes. It is advantageous here that the locking device is held radially in the base shaft in a simple manner by the relative rotation of the through openings. The assembly effort is reduced and the overall costs are reduced. Subsequent assembly of the locking device in the base shaft, in particular in tight installation spaces, is thus advantageously made possible.

The relative rotatability of the base shaft and the sliding cam element has the further advantage that the alignment or the angular position of the locking device in the base shaft can be freely selected independently of the position of the through opening of the sliding cam element. As a result, freedom of design is advantageously significantly increased. It is conceivable that, during assembly, the base shaft and / or the sliding cam element can be rotated relative to one another in an unlimited manner.

The camshaft preferably has more than one sliding cam element. The camshaft preferably comprises two sliding cam elements. The through opening of the sliding cam element and / or the base shaft can be inclined be trained. In other words, the through opening can be formed at an angle to a longitudinal axis of the sliding cam element and / or the base shaft.

Preferred embodiments of the invention are specified in the subclaims.

In a preferred embodiment, the sliding cam element has at least one shift gate section and / or at least one further section in which the associated through opening is provided. The shift gate section preferably has at least one shift groove which can interact with an actuator for axial displacement. The shift gate section can have a V-shaped shift groove, a Y-shaped shift groove and / or at least one S-shaped shift groove. The through opening can be formed in an area that is not functionally involved. In other words, the through opening can be formed in an area which does not influence the function of the shift gate section and / or the further section and thus does not affect a displacement process. It is advantageous here that the installation space on the sliding cam element is efficiently used by the formation of the through hole in the shift gate section.

The further section can be formed by a cylindrical section of the sliding cam element. In other words, the through hole can be formed on a further, in particular free, section in the sliding cam element.

In a further preferred embodiment, the sliding cam element comprises at least one latching groove which is formed radially on the inside on the sliding cam element, the associated through opening opening into the latching groove or the associated through opening being axially offset from the latching groove. The sliding cam element can be fixed in an axial position by means of the locking groove and the locking device. In other words, the locking device interacts with the locking groove in order to releasably fix the sliding cam element on the base shaft in an axial position. The sliding cam element preferably has at least two locking grooves.

If the through opening is designed in such a way that it opens into the locking groove, the locking device is advantageously secured radially outwardly by the relative rotation and the sliding cam element is releasably fixed in an axial position. The assembly position of the sliding cam element during the assembly of the locking device corresponds to a first axial position of the sliding cam element on the base shaft during operation. It is therefore advantageous that no subsequent axial displacement of the sliding cam element is required in order to bring the sliding cam element into a first operating position.

The latching groove is preferably designed to run radially around the inside of the sliding cam element. This advantageously enables a simple, axial alignment of the sliding cam element on the base shaft. During dismantling, the locking device can be removed quickly and easily, since the sliding cam element and / or the base shaft can be rotated indefinitely in the circumferential direction. In other words, the locking device can be aligned quickly and easily with the passage opening of the sliding cam element in order to dismantle it.

In a preferred embodiment, the locking device comprises at least one spring element and at least one latching means, the latching means being radially pretensioned by the spring element against the sliding cam element for locking. The spring element can be formed by a helical spring. Alternatively, the spring element can be formed by at least one plate spring. The locking means can be formed by a locking ball. It is also conceivable that the locking means is formed by a locking pin. In the event of an axial displacement, in particular a displacement process, of the sliding cam element on the base shaft, the latching means interacts with the latching groove due to the bias via the spring element. The sliding cam element is thereby releasably fixed in an axial position. This has the advantage that the sliding cam element is detachably locked in a simple manner at the corresponding axial position.

The basic shaft preferably has at least one receiving element which is arranged in the basic shaft and in which the locking device is embedded. This has the advantage that the locking means is guided in the receiving element. In particular when the basic shaft is designed as a hollow shaft, the receiving element forms a housing for the locking device.

The receiving element can be formed by a sleeve. The receiving element can be cylindrical. The receiving element can have a receiving base on which the spring element is supported in order to pretension the locking means.

The basic shaft also preferably has at least one receiving bore which is formed in the basic shaft and in which the locking device is embedded. The fundamental wave can be formed by a solid wave, in particular a solid material. The mounting hole can be in the solid material the fundamental wave be formed. The receiving bore can be cylindrical. The receiving bore can have a receiving base on which the spring element is supported in order to pretension the locking means. The receiving bore has the advantage that the locking means is guided in it.

In a further embodiment, an inner diameter of the receiving element or an inner diameter of the receiving bore and an inner diameter of the through opening of the sliding cam element for introducing the locking device are the same size or have a different size. It is conceivable that the inner diameter of the receiving element or the receiving bore is larger than the inner diameter of the sliding cam element. Alternatively, the inside diameter of the sliding cam element can be larger than the inside diameter of the receiving element or the receiving bore. Both inner diameters are preferably designed so large that the locking device can be introduced into the base shaft or into the receiving element.

The receiving element and / or the receiving bore preferably have at least one hardened inner surface on which the latching means rests. This has the advantage that functional reliability of the locking device and a service life are increased due to lower wear.

In a preferred embodiment, at least one transmission element is provided which connects the sliding cam element to the base shaft in a rotationally fixed manner. Here, the base shaft has at least one recess and the sliding cam element comprises at least one assembly opening through which the transmission element can be inserted into the recess of the base shaft. This has the advantage that, during operation, the sliding cam element can be fixed in at least one axial position by the locking device and is non-rotatably connected, in particular torque-locked, to the base shaft by the at least one transmission element. When assembling or dismantling the locking device, the non-rotatable connection of the sliding cam element with the base shaft can be released so that the base shaft and the sliding cam element can be rotated relative to one another.

Furthermore, it is advantageous that the transmission element as well as the locking device can be mounted subsequently or in the installed state of the camshaft, for example in a bearing alley, through the mounting opening. This advantageously simplifies assembly or assembly of the camshaft and reduces assembly time. This also reduces the overall cost of the camshaft.

In a further preferred embodiment, the base shaft and the sliding cam element have, at least in sections, a toothing that connects the base shaft to the sliding cam element in a rotationally fixed manner by interlocking. The sliding cam element can thus be fixed in an axial position by the locking device and is connected to the base shaft in a rotationally fixed manner, in particular in a torque-locked manner, through the form-fit connection of the teeth. In this embodiment, the sliding cam element has internal teeth and the base shaft has external teeth. The teeth are only partially formed on the base shaft and / or the sliding cam element. When assembling or dismantling the locking device, the non-rotatable connection of the sliding cam element with the base shaft can be released so that the base shaft and the sliding cam element can be rotated relative to one another.

A secondary aspect of the invention relates to a motor vehicle with at least one camshaft according to the invention. The camshaft can be designed as a sliding camshaft. The motor vehicle preferably comprises more than one camshaft, in particular two camshafts.

In a method according to the invention for assembling a camshaft, in particular a sliding camshaft, a base shaft and at least one sliding cam element are provided in a first method step. The sliding cam element and the base shaft each have at least one associated through opening. Furthermore, the sliding cam element is arranged axially displaceably on the base shaft. In a second method step, the sliding cam element is arranged on the base shaft in such a way that the respective through openings correspond. In a third method step, at least one locking device is introduced into the base shaft through the corresponding through openings. The locking device is arranged by being pushed into the base shaft. Subsequently, in a further method step, the base shaft and / or the sliding cam element is / are rotated relatively in such a way that the introduced locking device is radially secured, in particular held, in the base shaft by the sliding cam element. The sliding cam element can be rotated relative to the basic shaft and / or the basic shaft relative to the sliding cam element.

In a preferred embodiment of the method according to the invention, the base shaft and the sliding cam element are arranged in a bearing lane of a cylinder head housing during provision. Here, the locking device preferably after the introduction of the base shaft and the sliding cam element into the bearing alley through the through openings in the base shaft.

In a further preferred embodiment of the method, at least one receiving element is arranged through the associated through opening in the basic shaft before the basic shaft is provided. This has the advantage that the receiving element is preassembled, for example, before the arrangement of the base shaft and the sliding cam element in the bearing lane of the cylinder head cover. This reduces assembly effort and assembly time.

In one embodiment of the method, the locking device is introduced into the base shaft by an assembly tool. This advantageously enables an increase in the degree of automation and precise assembly of the locking device.

Regarding the advantages of the motor vehicle and the method for assembling a camshaft according to the invention, reference is made to the advantages explained in connection with the camshaft. In addition, the motor vehicle and the method can alternatively or additionally have individual features or a combination of several features mentioned above in relation to the camshaft.

The invention is explained in more detail below with further details with reference to the accompanying drawings. The illustrated embodiments represent examples of how the camshaft according to the invention can be configured. Furthermore, the illustrated embodiments represent individual method steps for assembling the camshaft according to the invention.

• 1 einen Ausschnitt einer Längsschnittansicht einer Nockenwelle gemäß einem bevorzugten erfindungsgemäßen Ausführungsbeispiel, in einer Lagergasse;
• 2 einen Ausschnitt einer Längsschnittansicht einer Nockenwelle nach einem weiteren erfindungsgemäßen Ausführungsbeispiel, in einer Lagergasse;
• 3 eine perspektivische Ansicht eines Schiebenockenelements der Nockenwellen gemäß 1 und 2;
• 4 einen Ausschnitt einer Längsschnittansicht der Nockenwelle gemäß 1, in einem ersten Verfahrensschritt eines bevorzugten erfindungsgemäßen Montageverfahrens;
• 5 einen Ausschnitt einer Längsschnittansicht der Nockenwelle gemäß 1, in einem zweiten Verfahrensschritt des bevorzugten erfindungsgemäßen Montageverfahrens;
• 6 einen Ausschnitt einer Längsschnittansicht der Nockenwelle gemäß 1, in einem dritten Verfahrensschritt des bevorzugten erfindungsgemäßen Montageverfahrens; und
• 7 einen Ausschnitt einer Längsschnittansicht der Nockenwelle gemäß 1, nach dem dritten Verfahrensschritt, insbesondere mit einer eingebrachten Arretiereinrichtung, des bevorzugten erfindungsgemäßen Montageverfahrens.

In these show

• 1 a detail of a longitudinal sectional view of a camshaft according to a preferred embodiment of the invention, in a bearing alley;
• 2 a detail of a longitudinal sectional view of a camshaft according to a further embodiment of the invention, in a storage alley;
• 3 a perspective view of a sliding cam member of the camshafts according to FIG 1 and 2 ;
• 4th a detail of a longitudinal sectional view of the camshaft according to 1 , in a first process step of a preferred assembly process according to the invention;
• 5 a detail of a longitudinal sectional view of the camshaft according to 1 , in a second method step of the preferred assembly method according to the invention;
• 6th a detail of a longitudinal sectional view of the camshaft according to 1 , in a third method step of the preferred assembly method according to the invention; and
• 7th a detail of a longitudinal sectional view of the camshaft according to 1 , after the third method step, in particular with an inserted locking device, of the preferred assembly method according to the invention.

1 shows a detail of a longitudinal sectional view of a camshaft 10 according to a preferred embodiment of the invention. The 4th to 7th show the camshaft 10 according to 1 in different assembly states, which will be discussed in more detail later. The camshaft 10 is in a warehouse alley 25th a cylinder head housing 26th an internal combustion engine arranged. The camshaft is concrete 10 in the Lagergasse 25th rotatably mounted.

The camshaft 10 includes a fundamental wave 11 and a slide cam member 12 . The sliding cam element 12 is on the fundamental wave 11 arranged axially displaceable. Furthermore, the sliding cam element 12 with the fundamental wave 11 non-rotatably connected. The non-rotatable connection can be established by means of a form-fit connection by means of at least one transmission element and / or by means of at least one section-wise toothing.

The camshaft 10 can also have more than one sliding cam element 12 exhibit. It also includes the camshaft 10 a locking device 13 and a receiving element 22nd , which will be discussed in more detail later.

The fundamental wave 11 is designed as a hollow cylinder. In other words, it is the fundamental 11 tubular. The fundamental wave 11 has at least in the area of the sliding cam element 12 a smooth outer surface 37 ' on. In other words, it is the fundamental 11 at least in the area of the sliding cam element 12 formed free of positive locking means in the form of elevations or projections, in particular a toothing.

The fundamental wave 11 has a through opening 14th on, through which the receiving element 22nd in the fundamental 11 is introduced. In addition, the fundamental wave 11 another through opening 32 on that of the through opening 14th opposite is formed. The through openings 14th , 32 have a common axis. The through openings 14th , 32 are each formed by a hole. The through openings 14th , 32 can each have a circular or angular cross-section.

In the fundamental 11 is the receiving element 22nd used. The receiving element 22nd is in the fundamental 11 arranged transversely to the longitudinal axis. The receiving element 22nd has a first end 33 through which the locking device 13 in the receiving element 22nd is introduced. The receiving element 22nd has a recording area for this purpose 36 ' on that to the first end 33 trained to be open. The locking device 13 is in the recording area 36 ' arranged.

According to 1 includes the locking device 13 a spring element 19th and a locking means 21st . The locking means 21st is formed by a locking ball that is used to releasably lock the sliding cam element 12 with a locking groove 17 ' , 17 " cooperates. On the locking groove 17 ' , 17 " will be discussed in more detail later. The locking means 21st can alternatively be formed by a locking pin.

The spring element 19th is formed by a helical spring. The spring element 19th can also be formed by at least one plate spring or at least one leaf spring. Furthermore, the spring element 19th also be formed by a spring of another type.

The locking device 13 is in the receiving element 22nd arranged such that the locking means 21st by the spring element 19th is pushed radially outward, in particular pressed. The locking means becomes concrete 26th through the through opening 14th the fundamental wave 11 by means of the spring element 27 pushed radially outward and against the sliding cam element 12 pressed. In other words, the locking means is 21st by the spring element 19th against the sliding cam element 12 biased radially outwards. The locking means 21st is thus through the sliding cam element 12 limited radially outward. As in 1 can be seen, the locking means 21st in a locking groove 17 ' engaged, causing the sliding cam element 12 in an axial position 18 ' is releasably fixed. The fundamental wave 11 and / or the sliding cam element 12 are rotated relative to each other, so that the locking device 13 by the sliding cam element 13 in the receiving element 22nd is secured radially, in particular held.

As in 1 shown is the receiving element 22nd sleeve-shaped and has a receiving base 47 ' on which the locking device 13 supported for preload. In other words, is the receiving element 22nd is partially designed as a hollow cylinder. The receiving element 22nd can also be cuboid. The receiving element 22nd includes a through hole that extends from the receiving base 47 ' to the second end 34 extends.

The first ending 33 of the receiving element 22nd is partially in the through hole 14th the fundamental wave 11 arranged. The receiving element 22nd has a second end 34 on that in a material recess 35 the fundamental wave 11 intervenes. The material recess 35 is at the fundamental 11 formed radially inside. The material recess 35 forms a seat that is the second end 34 of the receiving element 22nd records.

The further through opening 32 the fundamental wave 11 is in the area of the material recess 35 educated. The further through opening 32 and the through hole 48 ' of the receiving element 22nd join together the recording area 36 ' of the receiving element 22nd with an outer surface 37 ' the fundamental wave 11 .

The sliding cam element 12 according to 1 , 2 and 4 to 7 correspond to the sliding cam element 12 according to 3 . The sliding cam element 12 comprises a base body 38 with a central through opening 39 through which the sliding cam element 12 on the fundamental wave 11 is postponed. The fundamental wave 11 and the slide cam member 12 have a common longitudinal axis.

Furthermore, the sliding cam element comprises 12 two pairs of cams 28 with two different cam contours. The sliding cam element 12 can also have more than two different cam contours. The pairs of cams 28 are arranged rotated to each other. In other words, the cam pairs have 28 a stroke offset to each other.

Furthermore, the sliding cam element 12 a shift gate section 16 on, with two switching grooves 41 and a connecting link arranged in between 42 . During a displacement process, an actuator (not shown) with an actuator pin engages in one of the switching grooves during operation 41 so that the sliding cam element 12 in the longitudinal direction of the fundamental wave 11 is moved. The actuator can be a multiple actuator.

The shift gate section 16 is between the cam pairs 28 arranged. Specifically, the shift gate section borders 16 to a first of the pairs of cams 28 on. Between the scarf scenery section 16 and the second of the pairs of cams 28 is a cylindrical element section 43 educated. The cylindrical element section 43 is free of bumps and projections. In other words, the cylindrical element section 43 a smooth surface.

The sliding cam element 12 has a through opening 15th on that on an outer peripheral area 44 of the bridge 42 is arranged. The passage opening 15th extends from the outer peripheral area 44 radially inwards. Specifically, it forms the through opening 15th from the central passage opening 39 starting through the base body 38 a free passage radially outwards. The passage opening 15th can also be in the cylindrical element section 43 be arranged. The passage opening 15th forms an assembly opening for introducing, in particular pushing in, the locking device 13 in the recording area 36 ' of the receiving element 22nd . The passage opening 15th is formed by a hole. The passage opening 15th can alternatively have an angular shape in cross section.

According to the 1 , 2 as well as 4 to 7 it can be seen that the sliding cam element 12 two locking grooves 17th having on the sliding cam element 12 are formed radially inside. The sliding cam element 12 can also have more than two locking grooves 17th exhibit. The locking grooves 17th are from the central passage opening 39 radially outwards in the base body 38 radially circumferential. The locking grooves 17th are designed to be radially inwardly open. It forms a first locking groove 17 ' a first axial position 18 ' and a second locking groove 17 " a second axial position 18 " of the sliding cam element 12 .

As in 1 is shown, engages the locking means 21st by the relative rotation of the sliding cam element 12 and / or the fundamental 11 in the first locking groove 17 ' one because the through opening 15th in the first locking groove 17 ' flows out. The locking means 21st is through the first locking groove 17 ' secured radially and the sliding cam element 12 in a first axial position 18 ' releasably fixed or locked. Is the sliding cam element during operation 12 on the fundamental wave 11 Shifted in the longitudinal direction, the locking means engages 21st into the second locking groove 17 " a. The sliding cam element 12 is thus in a second axial position 18 " releasably fixed.

The passage opening 15th is in the sliding cam element 12 designed such that it, as described above, in the first locking groove 17 ' flows out. The passage opening 15th can also be used in the second locking groove 17 " flow out. It is conceivable that the through opening 15th is designed such that it becomes the first locking groove 17 ' and / or to the second locking groove 17 " is formed axially offset.

As in 3 shown comprises the slide cam member 12 several longitudinal grooves 29 on that on an inside 45 of the sliding cam element 12 are trained. The longitudinal grooves 29 extend in the longitudinal direction of the sliding cam element 12 and are to the central passage opening 39 trained to be open. According to the 1 , 2 and 4 to 7 it can be seen that the sliding cam element 12 a material recess 46 having that on the inside 45 is formed radially circumferentially. The material recess 46 can also be designed in sections in the circumferential direction. The longitudinal grooves 29 are through the material recess 46 and the locking grooves 17th interrupted in the longitudinal direction.

2 shows a detail of a longitudinal sectional view of a camshaft 10 according to a further embodiment of the invention. The camshaft 10 is just like the camshaft 10 according to 1 in a warehouse alley 25th arranged. In contrast to the camshaft 10 according to 1 is the fundamental wave 11 intended as a solid shaft. In other words, it is the fundamental 11 formed from a solid material. It also includes the camshaft 10 according to 2 instead of the receiving element 22nd a mounting hole 27 for the arrangement of the locking device 13 . The mounting hole 27 is in the solid material of the fundamental wave 11 educated. With the camshaft 10 according to 2 can thus the receiving element 22nd , as in 1 described are omitted. According to 2 is the locking device 13 in the mounting hole 27 arranged.

The mounting hole 27 forms a receiving area 36 " that corresponds to the recording area 36 ' of the receiving element 22nd the camshaft 10 according to 1 corresponds. The mounting hole 27 has a receiving base 47 " on which the spring element 19th to pretension the locking means 21st supports. In the solid material of the fundamental wave 11 is also a through hole 48 " trained, extending from the receiving tray 47 " to an outside surface 37 " the fundamental wave 11 extends.

The receiving element 22nd according to 1 and the mounting hole 27 according to 2 have an inner surface 31 on that can be hardened. The locking means 21st lies on the inner surface 31 on. The locking means 21st is through the inner surface 31 of the receiving element 22nd or the mounting hole 27 guided.

A method according to the invention for assembling the camshaft is described below 10 according to 1 based on 4th to 7th described. This procedure is the same for assembling the camshaft 10 according to 2 applicable.

In a first assembly step, the basic wave 11 and the slide cam member 12 in a warehouse alley 25th a cylinder head housing 26th provided. The sliding cam element is thereby 12 between two storage locations 49 the Lagergasse 25th arranged. Before inserting the fundamental wave 11 in the Lagergasse 25th becomes the receiving element 22nd through the through opening 14th of the Fundamental wave 11 introduced into this. Is the fundamental wave 11 formed by a solid shaft with a receiving bore, the insertion of the receiving element 22nd omitted. The fundamental wave 11 is then in the Lagergasse 25th inserted so that the sliding cam element 12 on the fundamental wave 11 is arranged axially displaceable. This pre-assembly state is in 4th shown.

5 shows a second assembly step in which the fundamental shaft 11 and the slide cam member 12 are aligned with one another that the through opening 14th the fundamental wave 11 and the through hole 15th of the sliding cam element 12 correspond. Here, the sliding cam element 12 compared to the fundamental wave 11 and / or the fundamental 11 opposite the sliding cam element 12 relatively twisted. Specifically, the fundamental wave 11 and / or the sliding cam element 12 are rotated relative to each other, so that the through openings 14th , 15th correspond or be aligned coaxially. It is conceivable that the fundamental wave 11 and / or the sliding cam element 12 for aligning the through openings 14th , 15th can also be moved relative to each other.

As in 5 Shown are the recording area 36 of the receiving element 22nd and the through hole 15th of the sliding cam element 12 aligned coaxially. At the fundamental 11 as a solid shaft are the mounting hole and the through opening 15th aligned coaxially. The inside diameter 23 ' of the recording area 36 or the receiving element 22nd is made smaller than the inner diameter 24 the passage opening 15th of the sliding cam element 12 . It is also conceivable that the inside diameter 23 ' of the recording area 36 is made larger than the inner diameter 24 the passage opening 15th . The inside diameter 23 ' , 24 can also be the same size.

In a third assembly step, as in 6th shown the spring element 19th and the locking means 21st in the recording area 36 of the receiving element 22nd introduced or inserted. At the fundamental 11 as a solid shaft, the spring element 19th and the locking means 21st introduced into a receiving area of the receiving bore. The introduction of the locking device 13 takes place through the corresponding through openings 14th , 15th . It can be introduced using an assembly tool. 7th shows the camshaft 10 with the locking device already installed 13 .

Is the locking device 13 in the fundamental 11 or the receiving element 22nd inserted, the basic shaft is / are then connected in a fourth assembly step 11 and / or the sliding cam element 12 so relatively twisted that the introduced locking device 13 by the sliding cam element 12 is limited radially outward. After turning, the through openings point 14th , 15th an angular offset, so that the locking device 13 , especially the locking means 21st and the spring element 19th , be held radially. This represents the in 1 Final assembly state of the camshaft shown 10 represents in which the locking device 13 in the fundamental 11 is arranged and the sliding cam element 12 the locking device 13 radial secures. Likewise, the 2 the final assembly state of the camshaft 10 with the fundamental wave 11 as a full wave.

List of reference symbols

10

camshaft

11

Fundamental wave

12

Sliding cam element

13

Locking device

14th

Through opening of the fundamental wave

15th

Through opening of the sliding cam element

16

Scenery section

17, 17 ', 17 "

Locking grooves

18, 18 ', 18 "

Axial position

19th

Spring element

21st

Locking means

22nd

Receiving element

23 '

Inner diameter of the receiving element

23 "

Inner diameter of the mounting hole

24

Inner diameter of the through opening of the sliding cam element

25th

Warehouse alley

26th

Cylinder head housing

27

Mounting hole

28

Pair of cams

29

Longitudinal groove

31

Inner surface

32

further opening of the fundamental wave

33

first end

34

second end

35

Material recess

36 ', 36 "

Recording area

37 ', 37 "

Exterior surface

38

Base body

39

central passage opening

41

Switching groove

42

Bridge bridge

43

cylindrical element section

44

Outer perimeter area

45

inside

46

Material recess

47 ', 47 "

Receiving base

48 ', 48 "

Through hole

49

Storage locations

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102013010330 A1 [0001, 0003]

Claims (16)

Camshaft (10) with a base shaft (11) and at least one sliding cam element (12) which is arranged axially displaceably on the base shaft (11), and at least one locking device (13), the base shaft (11) and the sliding cam element (12) each have an associated through opening (14, 15) through which the locking device (13) is introduced into the basic shaft (11), characterized in that the through opening (14) of the basic shaft (11) and the through opening (15) of the sliding cam element ( 12) are rotated relative to one another, so that the locking device (13) is radially secured, in particular held, by the sliding cam element (12) in the base shaft (11). Camshaft after Claim 1 , characterized in that the sliding cam element (12) has at least one shift gate section (16) and / or at least one further section (43) in which the associated through opening (15) is provided. Camshaft after Claim 1 or 2 , characterized in that the sliding cam element (12) comprises at least one locking groove (17) which is formed on the sliding cam element (12) radially on the inside, the associated through opening (15) opening into the locking groove (17) or the associated through opening (15) is axially offset to the locking groove (17). Camshaft after Claim 3 characterized in that the locking groove (17) is formed on the inside of the sliding cam element (12) so as to be radially circumferential. Camshaft according to one of the preceding claims, characterized in that the locking device (13) comprises at least one spring element (19) and at least one latching means (21), the latching means (21) by the spring element (19) against the sliding cam element (15) for Lock is biased radially. Camshaft according to one of the preceding claims, characterized in that the base shaft (11) comprises at least one receiving element (22) which is arranged in the base shaft (11) and in which the locking device (13) is embedded. Camshaft after one of the Claims 1 to 5 , characterized in that the base shaft (11) has at least one receiving bore (27) which is formed in the base shaft (11) and in which the locking device (13) is embedded. Camshaft after Claim 6 or 7th , characterized in that an inner diameter (23 ') of the receiving element (22) or an inner diameter (23 ") of the receiving bore (27) and an inner diameter (24) of the through opening (15) of the sliding cam element (12) for introducing the locking device (13 ) are the same size or have a different size. Camshaft after one of the Claims 6 to 8th , characterized in that the receiving element (22) and / or the receiving bore (27) have at least one hardened inner surface (31) on which the latching means (21) rests. Camshaft according to one of the preceding claims, characterized in that at least one transmission element is provided which connects the sliding cam element (12) with the base shaft (11) in a rotationally fixed manner, the base shaft (11) having at least one recess and the sliding cam element (12) having at least one Includes mounting opening through which the transmission element can be inserted into the recess of the base shaft (11). Camshaft according to one of the preceding claims, characterized in that the base shaft (11) and the sliding cam element (12) have, at least in sections, a toothing which non-rotatably connects the base shaft (11) to the sliding cam element (12) by interlocking. Motor vehicle with at least one camshaft (10), in particular a sliding camshaft Claim 1 . Method for assembling a camshaft (10), in particular a sliding camshaft, in which - A basic shaft (11) and at least one sliding cam element (12) are provided, the sliding cam element (12) and the basic shaft (11) each having at least one associated through opening (14, 15), and the sliding cam element (12) on the basic shaft (11) is arranged to be axially displaceable; - The sliding cam element (12) is arranged on the base shaft (11) in such a way that the respective through openings (14, 15) correspond; - At least one locking device (13) is introduced into the base shaft (11) through the corresponding through openings (14, 15); and - the base shaft (11) and / or the sliding cam element (12) is / are relatively rotated in such a way that the introduced locking device (13) is radially secured, in particular held, in the base shaft (11) by the sliding cam element (12). Procedure according to Claim 13 , characterized in that the base shaft (11) and the sliding cam element (12) are arranged in a bearing alley (25) of a cylinder head housing (26) during preparation. Procedure according to Claim 13 or 14th , characterized in that before the provision of the basic shaft (11) at least one receiving element (22) is arranged through the associated through opening (14) in the basic shaft (11). Method according to one of the Claims 13 to 15th , characterized in that the locking device (13) is introduced into the base shaft (11) by an assembly tool.

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