阅读说明：本技术 用于布置在斗轮挖掘机的铲斗上的、具有接收器的挖掘机齿的接收组件 (Receiving assembly for excavator teeth with receiver arranged on bucket of bucket wheel excavator ) 是由 维克多·拉兹 托马斯·奎亚特科夫斯基 爱德劳·巴特巴赫 迈克尔·布施 于 2019-03-14 设计创作，主要内容包括：本发明涉及一种挖掘机齿(10)的保持组件(1),该保持组件具有保持器(2),用于布置在斗轮挖掘机的铲斗上,挖掘机齿(10)具有齿头(11)和与齿头(11)邻接的保持轴(12),并且保持器(2)具有用于接收保持轴(12)的保持开口(13)。根据本发明,保持器(2)包括U形的保持体(14),该保持体布置在铲斗的铲斗叶片(22)的铲斗叶片接触表面(26)上,保持体(14)具有两个接触表面(16),这两个接触表面彼此间隔开并且相对于彼此倾斜,并且接触表面(16)和铲斗叶片接触表面(26)相对于彼此形成三角形布置。本发明还涉及一种挖掘机齿(10)、保持体(14)、接触板(15)以及用于形成这种类型的保持组件(1)的方法。(The invention relates to a retaining assembly (1) for an excavator tooth (10), having a retainer (2) for arrangement on a bucket of a bucket wheel excavator, the excavator tooth (10) having a tooth head (11) and a retaining shaft (12) adjoining the tooth head (11), and the retainer (2) having a retaining opening (13) for receiving the retaining shaft (12). According to the invention, the retainer (2) comprises a U-shaped retaining body (14) which is arranged on a bucket blade contact surface (26) of a bucket blade (22) of the bucket, the retaining body (14) has two contact surfaces (16) which are spaced apart from one another and inclined relative to one another, and the contact surfaces (16) and the bucket blade contact surfaces (26) form a triangular arrangement relative to one another. The invention also relates to an excavator tooth (10), a retaining body (14), a contact plate (15) and a method for forming a retaining assembly (1) of this type.)

1. A receiving assembly (1) of an excavator tooth (10) having a receiver (2) for arrangement on a bucket blade (22) of a bucket wheel excavator, wherein the excavator tooth (10) comprises a tooth head (11) and a receiving shaft (12) adjoining the tooth head (11), and wherein the receiver (2) comprises a receiving opening (13) for receiving the receiving shaft (12),

characterized in that the receiver (2) comprises a U-shaped receiver body (14) which is arranged/arrangeable on a bucket blade contact surface (26) of a bucket/a bucket blade of the bucket/the bucket blade (22), wherein the receiver body (14) comprises two contact surfaces (16) which are formed obliquely to each other and spaced apart, wherein the contact surfaces (16) and the bucket blade contact surfaces (26) form a triangular arrangement with respect to each other.

2. The receiving assembly (1) according to claim 1, wherein the triangular arrangement comprises an end surface (12.2) arranged opposite the bucket blade contact surface (26) in a top surface manner, wherein the end surface is arranged such that the triangular arrangement comprises/forms a trapezoidal geometry.

3. Receiving assembly (1) according to any one of the preceding claims, wherein the receiving body (14) defines at least five surfaces comprising the two contact surfaces (16) formed obliquely to each other, wherein the two contact surfaces (16) formed obliquely to each other are arranged in a second position and a fourth position and together with the bucket blade contact surface (26) form the triangular arrangement.

4. Receiving assembly (1) according to one of the preceding claims, characterized in that the two contact surfaces (16) formed obliquely to one another are each arranged between an opposite receiving shaft surface (12.1) and an end surface (12.2) arranged opposite the bucket blade contact surface (26).

5. Receiving assembly (1) according to any one of the preceding claims, wherein the triangular arrangement comprises a capped, flat-topped geometry or a trapezoidal geometry in cross-section.

6. Receiving assembly (1) according to any one of the preceding claims, characterised in that the two contact surfaces (16) formed obliquely to each other are surrounded by an opposite receiving shaft surface (12.1) and an end surface (12.2) arranged opposite the bucket blade contact surface (26), wherein the proportion of non-contact surfaces in the receiving assembly relative to the proportion of the excavator tooth contact surface (16) is at least 50%, preferably at least 75%, particularly preferably greater than or equal to the total contact surface (16).

7. Receiving assembly (1) according to one of the preceding claims, characterized in that the two contact surfaces (16) formed obliquely to one another enclose an angle in the range from 110 ° to 160 °, in particular 120 ° to 150 °, in particular 125 ° to 145 °, with the opposite receiving shaft surface (12.1), respectively; and/or characterized in that the two contact surfaces (16) formed obliquely to each other enclose an angle in the range from 110 ° to 160 °, in particular 120 ° to 150 °, in particular 125 ° to 145 °, respectively with the end surface arranged opposite the bucket blade contact surface (26)/the end surface (12.2); and/or wherein the receiving shaft surface (12.1) is arranged at least substantially orthogonal to the bucket blade contact surface (26).

8. Receiving assembly (1) according to any one of the preceding claims,

the receiver (2) comprises a contact plate (15), wherein the contact plate (15) comprises a further contact surface (17), and wherein the three contact surfaces (16, 17) form a triangular arrangement with respect to each other; and/or characterized in that the bucket blade contact surface (26) or the contact plate (15) is arranged on the receiving body (14) such that the open side of the U-shape of the receiving body (14) is at least partially closed by the bucket blade contact surface (26) or the contact plate (15).

9. Receiving assembly (1) according to one of the preceding claims, wherein the receiving opening (13) comprises an opening longitudinal axis (18) along which the receiving shaft (12) can be introduced into the receiving opening (13), wherein the contact surface (16) of the receiving body (14) and the contact surface (17) of the contact plate (15) or the bucket blade contact surface (26) point towards the opening longitudinal axis (18); and/or characterized in that the receiving body (14) comprises a mouth side (19) via which the excavator tooth (10) is/can be introduced for arranging the receiving shaft (12) in the receptacle (2), wherein the contact surfaces (16, 17) narrow towards one another along the opening longitudinal axis (18) of the receiving opening (13) with increasing distance from the mouth side (19) such that they form a surface of a triangular pyramid or a cross section of a quadrangular trapezoid, in particular a quadrangle with a flat upper side.

10. A method for forming a receiving assembly (1) for an excavator tooth (10) having a receiver (2) for arrangement on a bucket blade (22) of a bucket wheel excavator, wherein the excavator tooth (10) comprises a tooth head (11) and a receiving shaft (12) adjoining the tooth head (11), and wherein the receiver (2) comprises a receiving opening (13) for receiving the receiving shaft (12), and wherein a bucket comprises a bucket blade/the bucket blade (22) having a bucket blade contact surface (26), and wherein the method comprises at least the following steps:

-creating two spaced apart contact surfaces (16) formed obliquely to each other in an inner area of a U-shaped receiving body (14) delimiting the receiving opening (13),

-arranging the receiving body (14) on the bucket blade contact surface (26) such that the open side of the U-shape of the receiving body (14) is at least partially closed by the bucket blade contact surface (26) and the three contact surfaces (16, 26) form a triangular arrangement with respect to each other.

11. The method according to the preceding method claim,

-providing a contact plate (15) with a further contact surface (17) on the bucket blade contact surface (26),

-arranging the contact plate (15) on the receiving body (14) such that the open side of the U-shape of the receiving body (14) is at least partially closed by the contact plate (15) and the three contact surfaces (16, 17) form a triangular arrangement with respect to each other.

12. Method according to any one of the preceding method claims, characterized in that the receiving body (14) is welded to the contact plate (15) or to the bucket blade contact surface (26), wherein for positioning the receiving body (14) on the contact plate (15) or on the bucket blade contact surface (26) a reference body having the shape of the receiving shaft (12) is inserted into the receiving opening (13).

13. Method according to any of the preceding method claims, characterized in that the two contact surfaces (16) formed obliquely to each other are arranged between the opposite receiving shaft surface (12.1) and the end surface (12.2) arranged opposite the bucket blade contact surface (26), respectively.

14. Method according to any of the preceding method claims, characterized in that the two contact surfaces (16) formed obliquely to each other are arranged at an angle in the range from 125 ° to 145 ° with the opposite receiving shaft surface (12.1), respectively; and/or characterized in that the two contact surfaces (16) formed obliquely to each other are arranged at an angle in the range of 125 ° to 145 ° with the end surface/the end surface (12.2) arranged opposite the bucket blade contact surface (26), respectively.

15. Excavator tooth (10) for a receiving assembly (1) according to any one of the preceding device claims,

excavator tooth (10) of construction according to any one of the preceding device claims.

16. Receiving body (14) for a receiving assembly (1) according to any one of the preceding device claims,

the receiver (14) of the construction according to any one of the preceding device claims.

17. Contact plate (15) for a receiving assembly (1) according to one of the preceding device claims,

a contact plate (15) structured according to any one of the preceding device claims.

Technical Field

The invention relates to a receiving assembly for an excavator tooth, having a receiver for arrangement on a bucket blade of a bucket wheel excavator, wherein the excavator tooth comprises a tooth head and a receiving shaft adjoining the tooth head, and wherein the receiver comprises a receiving opening for receiving the receiving shaft.

Background

EP 0584101B 1 discloses by way of example a receiving assembly for an excavator tooth having a receiver for arrangement on a bucket of a bucket wheel excavator. The excavator tooth includes a tooth head and a receiving shaft adjoining the tooth head, wherein the receiver has a receiving opening for holding the holding shaft. The securing element serves to prevent the receiving shaft from being released again from the receiving opening if the receiving shaft is introduced into the receiving opening.

DE 3444563 a1 describes a receiving assembly for an excavator tooth of the relevant type.

The excavator teeth of bucket wheel excavators are subject to high wear and must therefore be replaced frequently and within short production interruptions, depending on the use. To replace an excavator tooth, a defective or worn excavator tooth must be released from the receiver and a new excavator tooth must be inserted into the receiver. A typical tooth fastening system for a bucket wheel excavator that allows worn teeth to be replaced in the shortest possible time typically consists of three main components. Firstly, they are excavator teeth, in addition to a receptacle with a receiving opening, and finally a fixing element, which can be configured as a resilient fixing element or, for example, as a wedge, which can optionally also be additionally fixed in the opposite direction again, for example by using a winding wire. Here, the excavator tooth and the receiver are usually simply wedged into the support region and are fixed in a play-free manner only on their tooth longitudinal axis by means of fixing elements. The receiver is in itself typically non-releasably fastened to the bucket of a bucket wheel excavator, for example by a weld which non-releasably connects the receiver to the bucket blade.

In addition to the actual digging force acting on the excavator tooth, in addition, alternating side-to-side digging forces frequently act on the excavator tooth. As excavator teeth often lack lateral stability, the situation of hitting the excavator teeth out of the receptor in the lateral direction is more and more occurring, further increasing the risk of failure of the bucket wheel excavator.

Although the small wedge angle of the receiving openings in receptacles based on self-locking leads to an improved absorption of forces, in particular lateral digging forces, this still leads to an increased manufacturing effort required for forming the receiving openings in the receptacles, since they have to be manufactured more precisely with a smaller wedge angle. In particular, when not only the excavating force in the main excavating direction acts on the excavator tooth, but additionally also lateral excavating forces with higher force peaks act on the excavator tooth, a plurality of contact surfaces in the receptacle need to be machined relative to one another and must correspond to correspondingly machined contact surfaces on the receiving shaft of the excavator tooth. Very tight tolerances are often observed, particularly when the teeth themselves cannot "enter" deeper into the receiving openings of the receivers to continue to ensure that the excavator teeth can be quickly removed from the receivers in situ.

Disclosure of Invention

The object of the present invention is to develop a receiving assembly for arranging excavator teeth in a receiver of a bucket wheel excavator, wherein the receiving assembly is intended to comprise a simple construction and wherein the excavator teeth should be able to withstand alternating loads. In addition, the excavator teeth should be replaceable in the receptacle in a simple manner.

Starting from a receiving assembly according to the preamble of claim 1 and from a method according to the preamble of claim 8, this object is achieved by the features of the respective features. Advantageous developments of the invention are given in the dependent claims.

The present invention includes the following technical teachings: the receiver comprises a U-shaped receiving body which is arranged on a bucket blade contact surface of a bucket blade of the bucket, wherein the receiving body has two spaced-apart contact surfaces which are formed obliquely with respect to one another, wherein these contact surfaces and the bucket blade contact surface form a triangular arrangement with respect to one another.

The improvements in the receiving assembly according to the present invention allow the excavator tooth to be held so that the excavator tooth can absorb both the main digging force and the side digging force and transfer it into the receiver of the receiving assembly without prematurely loosening the excavator tooth in the receiver. The contact surfaces oriented in a triangular arrangement relative to one another allow forces to be transmitted from the receiving shaft of the excavator tooth into the receiving opening of the receiver, wherein advantageously forces can be transmitted both in the main excavating direction and additionally in the lateral direction without having to produce the contact surfaces by a large manufacturing effort and without the contact surfaces having to be dimensioned relative to one another.

It is particularly provided that the triangular arrangement comprises an end surface in the form of a top surface, which end surface is arranged opposite the bucket blade contact surface, wherein the end surface is arranged such that the triangular arrangement comprises/forms a trapezoidal geometry. This provides an advantageous geometric arrangement. The top surface is preferably non-contact, that is, has no support function with respect to the excavator teeth.

It is particularly provided that the receiving body defines at least five surfaces, including two contact surfaces formed obliquely to each other, wherein the two contact surfaces formed obliquely to each other are arranged in the second and fourth positions and form a triangular arrangement together with the bucket blade contact surface. This provides an advantageous geometric arrangement. The surfaces between the contact surfaces are preferably non-contacting side surfaces, that is, without a supporting function with respect to the excavator teeth. These side surfaces are arranged between two contact surfaces formed obliquely to each other and the bucket blade contact surface.

It is provided in particular that two contact surfaces formed obliquely to one another are each arranged between the opposite receiving shaft surface and the end surface arranged opposite the bucket blade contact surface. This provides an advantageous geometric arrangement. The end surface is preferably contactless, that is to say has no supporting function with respect to the excavator tooth.

In particular, it is provided that the triangular arrangement has a capped, flat-topped geometry in cross section or a trapezoidal geometry. This provides an advantageous geometric arrangement.

It is provided in particular that two contact surfaces formed obliquely to one another are surrounded by an opposite receiving shaft surface and an end surface arranged opposite the bucket blade contact surface, wherein the proportion of the non-contact surfaces in the receiving assembly is at least 50%, preferably at least 75% and particularly preferably greater than or equal to the total contact surface relative to the proportion of the excavator tooth contact surface (16).

Here, the cross-sectional length of the contact surface may be at least 50% or at least 75% of the cross-sectional length of the end surface. This also provides an advantageous geometrical arrangement. In particular, it is provided that the cross-sectional length of the contact surface is at least 25% or at least 50% of the cross-sectional length of the receiving shaft surface.

It is provided in particular that two contact surfaces formed obliquely to one another enclose an angle in the range from 110 ° to 160 °, preferably 120 ° to 150 °, further preferably 125 ° to 145 °, with the opposite receiving shaft surfaces, respectively. This provides an advantageous geometric arrangement.

It is provided in particular that the two contact surfaces formed obliquely to one another each enclose an angle in the range from 110 ° to 160 °, preferably 120 ° to 150 °, further preferably 125 ° to 145 °, with the end surface arranged opposite the bucket blade contact surface. This provides an advantageous geometric arrangement.

Here, the respective receiving shaft surface may be arranged at least substantially orthogonal, in particular exactly orthogonal, to the bucket blade contact surface.

It is provided in particular that the receiver comprises a U-shaped receiving body and a contact plate, wherein the receiving body comprises two spaced-apart contact surfaces which are formed obliquely to one another and the contact plate comprises a further contact surface, and wherein the three contact surfaces form a triangular arrangement with respect to one another.

The contour of the contact surface of the contact plate is preferably related to the contour of the bucket blade contact surface of the bucket blade. This allows, for example, the contact plate to be positioned or arranged on the bucket blade contact surface in a gapless manner. Here, no gap means no gap between the surfaces, as a result of which an optimum force delivery can be achieved.

The contact surfaces produced inside the receiving opening of the receiving body can be milled in a simple manner and the contact plates can comprise the contact surfaces which the contact plates already in the semi-finished state comprise. Then, the contact plate only needs to be brought to the desired size, and the contact plate can be arranged on the U-shaped receiving body such that the two contact surfaces in the receiving opening of the contact body and the contact surfaces on the contact plate form a triangular arrangement with respect to one another and a corresponding positional tolerance with respect to one another. Here, the three surfaces do not necessarily intersect, and the three surfaces may be defined such that they are formed spaced apart from each other. Here, the triangular arrangement occurs only by the orientation of the contact surfaces relative to each other, for example because the two contact surfaces in the receiving body are formed as top surfaces and form legs, as a result of which the contact surfaces on the contact plate form a bevel which can be regarded as a bottom surface, as a result of which the two contact surfaces in the receiving body extend in a roof-like manner over the contact surfaces on the contact plate.

It is particularly advantageous if the bucket blade contact surface or the contact plate is arranged on the receiving body such that the U-shaped open side of the receiving body is at least partially closed by the bucket blade contact surface or the contact plate. Here, the inner wall of the receiving opening in the receiving body and the contact plate form a closed inner contour for holding the receiving shaft of the excavator tooth. The advantage of the initially separate contact plate lies in the fact that: it can be mounted on the receiving body using a reference body in the form of a receiving shaft of the excavator tooth, as a result of which a precise receiving opening maintaining tight tolerances can be formed in a simple manner, in particular in the case of a reference body having the precise shape of the receiving shaft. Thus, even in the case of an elongated, deep receiving opening formed as a result of a small wedge angle, a small wedge angle of the receiving opening can be achieved without machining the inner contact surfaces, which machining results in a particular manufacturing effort.

The receiving opening comprises an opening longitudinal axis along which the receiving shaft can be introduced into the receiving opening. Here, the contact surface of the receiving body and the contact surface of the contact plate or the bucket blade contact surface may be directed towards the opening longitudinal axis. The two contact surfaces inclined to each other, which form part of the inner contour of the receiving opening, do not necessarily meet at a common edge, and a further top surface may be provided above the contact plate, so that the cross-sectional shape of the receiving opening forms substantially a trapezoid.

Furthermore, the receiving body comprises a mouth side, in which excavator teeth can be introduced to arrange the receiving shaft in the receiver. Here, the contact surfaces may narrow towards one another along the opening longitudinal axis of the receiving opening with increasing distance from the mouth side, as a result of which they may form the surface of a triangular pyramid or may form a quadrangular trapezoid in cross section, in particular a quadrangle with a flat upper side. Thus, the trapezoidal shape of the cross-sectional area of the receiving opening above the contact plate becomes smaller with increasing distance from the mouth side of the receptacle.

It is particularly advantageous if the contact plate is welded to the receiving body and/or to the bucket blade. Further, the receiver may include a weld bevel formed on an outer side of the rim, and the receiver may be welded to a bucket of the bucket wheel excavator via the weld bevel. In particular, the contact plate can thus be welded first to the receiving body in order then to weld the assembly consisting of the receiving body and the contact plate to the bucket of the bucket wheel excavator, in particular to the bucket blade.

Two contact surfaces spaced apart and formed obliquely to each other on the receiving body can be machined. Furthermore, receiving grooves can be machined in the respective limbs of the U-shaped receiving body for welding on the contact plate, in order to allow an accurate positioning of the contact plate on the contact body, in particular using a reference body in the form of a receiving shaft.

In particular, two contact surfaces formed obliquely to each other may be arranged between the opposite receiving shaft surface and the end surface arranged opposite to the bucket blade contact surface, respectively. This provides an advantageous geometric arrangement.

In particular, two contact surfaces formed obliquely to each other may be arranged at an angle ranging from 125 ° to 145 ° with the opposite receiving shaft surfaces, respectively. This provides an advantageous geometric arrangement.

In particular, the two contact surfaces formed obliquely to each other may be arranged at an angle ranging from 125 ° to 145 ° respectively with/to the end surface arranged opposite to the bucket blade contact surface. This provides an advantageous geometric arrangement.

Furthermore, the invention relates to a method for forming a receiving assembly for an excavator tooth, the receiving assembly having a receiver for arrangement on a bucket blade of a bucket wheel excavator, wherein the excavator tooth comprises a tooth head and a receiving shaft adjoining the tooth head, and wherein the receiver comprises a receiving opening for receiving the receiving shaft, and wherein the bucket comprises a bucket blade having a bucket blade contact surface. Here, the method according to the invention provides the following steps: two spaced-apart contact surfaces, which are formed obliquely to one another, are created in the region inside the receiving opening of the U-shaped receiving body, the receiving body being arranged on the bucket blade contact surface, with the result that the open side of the U-shape of the receiving body is at least partially closed by the bucket blade contact surface, and the three contact surfaces form a triangular arrangement relative to one another.

A preferred measure of the invention is characterized in that a contact plate with a further contact surface is provided on the bucket blade contact surface and the contact plate is arranged on the receiving body, with the result that the U-shaped open side of the receiving body is at least partially closed by the contact plate and the three contact surfaces form a triangular arrangement with respect to one another.

The contour of the contact surface of the contact plate is preferably related to the contour of the bucket blade contact surface of the bucket blade. This allows, for example, the contact plate to be positioned or arranged on the bucket blade contact surface in a gapless manner.

It is particularly advantageous if the contact plate can be welded to the receiving body, wherein a reference body in the form of a receiving shaft can be inserted into the receiving opening for positioning the contact plate on the receiving body. This makes it possible to create an accurate, closely toleranced receiving opening in the receiver in which the receiving shaft of the excavator tooth is held in a play-free manner. The initially open accessibility of the inner region of the receiving body means that the contact surface can be machined before the contact plate is welded to the free end of the limb of the U-shaped receiving body. Finally, as a final step, the assembly consisting of the receiving body and the contact plate can be mounted, in particular welded, on the bucket of the bucket wheel excavator.

Drawings

Further measures to improve the invention will be explained in more detail below in connection with the description of preferred exemplary embodiments of the invention with reference to the drawings, in which:

fig. 1 shows a side view of a preferred embodiment of a receiver assembly with excavator teeth arranged in a receiver, wherein the receiver body of the receiver is shown partially in section,

figure 2 shows a cross-sectional view of the receiving assembly according to figure 1,

figure 3 shows a rear view of the receiving shaft of the excavator tooth,

FIG. 4 shows a perspective view of an excavator tooth having a tooth head and a receiving shaft which adjoins the tooth head on the rear side and

FIG. 5 shows a perspective view of a receiver assembly having excavator teeth disposed in a receiver.

Detailed Description

Fig. 1 is a side view showing a preferred embodiment of a receiving assembly 1 having excavator teeth 10 and a receiver 2 for placement on a bucket of a bucket wheel excavator. The excavator tooth 10 comprises a tooth head 11, during use of the bucket wheel excavator, the tooth head 11 is in contact with the material to be removed, and the excavator tooth 10 comprises a receiving shaft 12, which receiving shaft 12 adjoins the tooth head 11 on the rear side and is introduced into a receiving opening 13 of the receptacle 2.

The receiver 2 has a receiving body 14 as a basic component, the receiving body 14 having a U-shaped basic shape. The receiving opening 13 is formed in the U-shaped inner region of the receiving body 14, and the open side of the U-shape of the receiving body 14 is closed by a contact plate 15. Here, the contact plate 15 is arranged on a bucket blade contact surface 26 of the bucket blade 22 of the bucket. Thus, the open side of the U-shape of the receiving body 14 is arranged with the contact plate 15 on the bucket blade contact surface 26.

This is particularly due to the fact that: the contour of the contact surface 17 of the contact plate 15 is related to the contour of the bucket blade contact surface 26 of the bucket blade. This allows, for example, the contact plate 15 to rest on the bucket blade contact surface 26 in a gapless manner.

The receiving opening 13 is of wedge-shaped configuration and comprises a mouth side 19 with a larger cross-section which becomes successively smaller with increasing distance from the mouth side 19. On the rear side, the receiving shaft 12 is fixed in the receiving opening 13 by a fixing element 25.

Fig. 2 shows a sectional view through the arrangement of the receiving shaft 12 in the receiving body 14 of the receiver 2. The inner region of the receiving body 14 comprises two spaced-apart contact surfaces 16 formed obliquely to one another, which extend as two side ceiling plates above the contact plate 15. The contact plate 15 has a further contact surface 17 and the cross-sectional view shows that the three contact surfaces 16, 17 thus form a triangular arrangement with respect to each other. Here, all contact surfaces 16, 17 are directed towards the opening longitudinal axis 18. Furthermore, the contact surface 16 and the bucket blade contact surface 26 also form a triangular arrangement with respect to each other.

If the receiving shaft 12 is introduced into the receiving opening 13, the corresponding surfaces on the receiving shaft 12 come into contact with the contact surfaces 16, 17. Here, the cross-sectional view shows that forces can be applied to the receiving shaft 12 from each direction transverse to the opening longitudinal axis 18 and can be transferred into the receptacle 2. In particular, due to the fact that the receiving body 14 can be welded to the bucket blade 22, for example by means of a side weld 24, it is also possible to load in the direction of the contact plate 15, the contact plate 15 in particular lying flat against the retaining side of the bucket blade 22. Here, the weld seam 23 for fastening the contact plate 15 to the receiving body 14 serves only to form a closed contour of the receiving opening 13 with correspondingly tight tolerances, and forces acting from the receiving shaft 12 in the direction of the contact plate 15 can be transmitted directly into the bucket blade 22 of flexurally rigid construction.

Fig. 2 further depicts a receiving shaft surface 12.1 and an end surface 12.2, each of which may contribute to forming a triangular arrangement.

The upper side of the excavator tooth is preferably supported by means of only two contact surfaces 16. In other words: the other upper and side surfaces may be maintained free of contact (except for the lower surface 17).

The two opposite receiving shaft surfaces 12.1 and the end surfaces 12.2, respectively, are contactless. Thus, the proportion of non-contact surfaces in the receiving assembly relative to the proportion of contact surfaces (16) may be at least 50%, preferably at least 75% and particularly preferably greater than or equal to the total contact surface.

Fig. 3 shows a rear view of the excavator tooth 10 with the tooth head and the receiving shaft 12. Arranged on the receiving shaft 12 are contact counter surfaces 16 'and 17', which correspond to the arrangement of the contact surfaces 16 and 17 of the receiving component 1.

Fig. 4 is a perspective view showing the excavator tooth 10, the excavator tooth 10 having contact opposing surfaces 16 'and 17' partially outlining the receiving shaft 12, and the cross section of the receiving shaft 12 narrowing with increasing distance from the tooth head 11.

Fig. 5 is another perspective view showing the arrangement of the excavator tooth 10 having the tooth head 11 and the receiving shaft 12 in the receptacle 2. On the rear side, the receiving shaft 12 is fixed by a fixing element 25 to resist extraction of the excavator tooth 10 from the receiver 2.

As shown in fig. 2, the receiver 14 of the receiver 2 comprises in lateral direction welding bevels 20 and 21, via which the receiver 14 can be welded to the bucket blade 22. The first weld bevel 20 is configured larger and allows a weld seam with a larger cross section to be arranged on the bucket blade 22 to absorb larger forces, and the smaller weld bevel 21 on the rear side abutting the smaller weld bevel 21 on the receiver 14, the weld bevel 21 allowing a smaller weld seam, since the force delivered from the receiver 14 to the bucket blade 22 becomes smaller with increasing distance from the tooth head 11.

The invention is not limited in its implementation to the preferred exemplary embodiments specified above. On the contrary, many variants are conceivable which use the illustrated solution even in fundamentally different embodiments. All of the features and/or advantages (including design details or spatial arrangements) presented in the claims, the description or the drawings are essential to the invention both by themselves and in various combinations.

List of reference numerals

1 receiving assembly

2 receiver

10 excavator tooth

11 tooth head

12 receiving shaft

12.1 receiving shaft surface (non-contact side surface in particular)

12.2 end surfaces (especially non-contact end surfaces)

13 receiving opening

14 receiver

15 contact plate

16 contact plate

16' contact opposing surfaces

17 contact surface

17' contact opposing surfaces

18 longitudinal axis of opening

19 mouth side

20 bevel of welding

21 bevel for welding

22 bucket blade

23 welding line

24 welding seam

25 fixing element

26 bucket blade contact surface