Bucket with replaceable teeth system
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-07-24
- Publication Date
- 2026-04-02
AI Technical Summary
Existing bucket designs suffer from high energy consumption and wear due to thick, welded connections between teeth and front pieces, leading to increased stress and potential cracking, while lacking efficient, environmentally friendly, and cost-effective solutions for replacing wear parts.
A connection system using integrated moment arms on the front piece and teeth that overlap horizontally, forming a rigid, bolt-free, and weld-free connection, absorbing forces and reducing shear and bending moments, allowing for interchangeable teeth made from the same plate as the front piece.
This connection reduces energy consumption and wear, extends the service life of the bucket components, and minimizes stress-related cracking by optimizing the connection between the teeth and front piece, promoting a more environmentally friendly and cost-effective mass movement.
Smart Images
Figure NO2025050136_02042026_PF_FP_ABST
Abstract
Description
[0001] Bucket with replaceable tooth system
[0002] Field of invention
[0003] The present invention relates to a device for connecting teeth to various types of buckets for the use of moving masses. The connection can be used on a number of types of buckets used on, for example, excavators and wheel loaders.
[0004] The connection provides an in-line rigid connection between the front plate of the bucket and the teeth, and the connection is arranged so that a manual will be able to change teeth during the bucket's lifetime.
[0005] The connection mainly consists of a machined profile on the tooth that coincides with the machined profile in the faceplate, which together forms a rigid connection. Connection can also be used to extend the front piece or connect other wear parts against a bucket.
[0006] Further a technical solution for a rigid connection between the tooth and the bucket is described.
[0007] Background of the invention
[0008] There is a strong focus on finding more environmentally friendly and costreducing solutions related to the movement of masses. A large proportion of today's costs associated with moving masses are related to energy use on the machines and wear and tear on the equipment.
[0009] Much of the energy when for example digging in masses goes to penetrating the masses, in the form of the bucket's teeth having to be pressed into the masses to separate the masses so that the front piece can more easily divide the masses in a way where a proportion of the masses enter the bucket itself. Here, a slender tooth with an associated slim front piece will require less energy to penetrate the masses and fill the bucket than a similarly thick tooth and thick front.
[0010] A thin tooth with an associated thin front piece will also weigh less and thus contribute to reduced energy consumption by the bucket weighing less and will therefore make that each and every mass lift will require less energy.
[0011] Another cost driver is wear and tear on equipment due to the masses gnawing off material.
[0012] The teeth and the front and sides of the bucket are the parts of the equipment where you will typically see the most wear. A slender tooth with an associated slender front part will require less separation of the masses, before the masses can be loaded into the bucket itself and will thus be advantageous both in terms of energy use and wear.
[0013] The amount of wear on wear parts is usually dependent by the masses you are digging in, where hard rock can often wear more on the equipment than if you are digging in soft soil.
[0014] Teeth are the wear part that is replaced most often and is in the vast majority of applications interchangeable.
[0015] The interchangeable teeth are mainly made as forged or cast teeth, which are connected to a forged or cast adapter which in turn is welded to a front piece cut out of a plate. Welded connections can increase the stresses in the welding zone, thus increasing the risk of cracking and breakdowns on the bucket.
[0016] The further described invention makes it possible to produce the teeth from the same plate as used for the front piece, and it further describes a solution that does not need welding or bolts when connecting the front piece to the tooth. A number of solutions have been developed to replace what are typically wear parts, and then one often talks mainly about teeth and front protectors.
[0017] An optimal solution to achieve the most environmentally friendly and cost- effective method of moving masses would be a slim bucket with an associated slim front piece and teeth that easily penetrate the masses and have a light weight, while at the same time it is easy to replace what are typically defined as wear parts.
[0018] An invention is further described that maintains many of the preferred features that are looked for in order to have the most possible environmentally friendly and cost-effective mass movement.
[0019] Discussion of state of the art
[0020] A number of different interchangeable tooth systems have been developed over the years; then mostly based on forged or cast manufacturing methods where the teeth are eventually hardened to achieve the best possible wear resistance in the form of increased hardness.
[0021] In general, the buckets are welded constructions, where you further weld on extra material at exposed wear areas. In the lower and front parts of the bucket, it is most often welded a front piece that has a slightly larger thickness than the other plates in the bucket to achieve increased strength.
[0022] During normal digging, it is the front piece that hits the masses first. To better tear the mases apart the front piece is most often equipped with a set of teeth. Since the teeth are exposed to a high degree of wear, the teeth are usually attached to the front piece in a way that allows them to be replaced.
[0023] There are a number of methods to connect the teeth to the front piece, for smaller machines where the teeth see less force, you often see that the teeth are bolted directly to the front piece and can be replaced in their entirety if necessary.
[0024] The most commonly used method of attaching teeth to the front piece is by using a tooth adapter that is welded to the front piece. The tooth adapter is then often made in a way where it has two arms that extend backwards from an adapter front, where one arm is welded on the underside of the front piece and the other arm is welded on the top side of the front piece. The adapter front itself has a certain length and comes naturally on the front side of the front piece and is designed and adapted to a replaceable tooth front. The adapter front is usually designed with four sides, which are where it is thickest at its rear edge.
[0025] The tooth front is in its rear part designed with a cavity that has an internal geometry that coincides with the design of the adapter front, the front part of the tooth front is solid to have as much material as possible for increased service life. The tooth front is mounted on the adapter front by passing the rear cavity of the tooth front over the length of the adapter front, when the tooth front rear part is guided over the adapter front, a locking pin is inserted that connects the adapter front to the tooth front so that the two parts cannot be easily pulled apart. The connection between the adapter front and the rear part of the tooth front will be able to take forces in all directions as one part embraces the other.
[0026] Another well-known solution is "KVX", where the teeth are screwed to the underside of the front piece using one or more bolts that are threaded directly into the tooth or in the front piece.
[0027] A common feature of known solutions is that the tooth mounted on the front piece has a thickness that is thicker than the need for strength in the front piece. This means that you have a larger front area than necessary when the bucket is pushed through the masses, thus having higher energy consumption and wear than if the tooth mounted on the front piece would have had the same thickness.
[0028] Furthermore, it can be seen that the arm of the tooth adapter that is attached to the underside of the front piece must be protected from wear, which in turn may mean that the underside of the bucket must be given extra protection, which in turn is weight and cost driving.
[0029] US3136077A describes a tooth for excavation equipment used in caliche and similar stratum. WO2011074983A1 describes a replaceable wear part for attaching to a leading edge of a working tool.
[0030] Object of the invention
[0031] It is an object of the invention to provide a cost-optimized in-line connection between the front piece and the tooth that takes care of the most exposed areas of wear on a bucket.
[0032] Another object is to provide a connection that reduces bending moments and shear forces in the tooth and front piece so that one can reduce the amount of steel in the construction and at the same time increase the service life of the tooth and the front piece.
[0033] A third object is to provide a tooth that can be produced from a plate with the same thickness and quality as the front piece.
[0034] A fourth object is to provide a connection of the teeth to the front piece so that the teeth appear as a direct extension of the front piece in relation to thickness, which in turn will reduce energy consumption and wear when moving masses.
[0035] A fifth object is to provide a connection between the teeth and the front piece without having to use bolts or welds that in the long run can cause cracks due to internal stresses. A sixth object is to provide a connection between teeth and front piece that propagates horizontal loads against the teeth directly into the front piece without setting up shear forces or moments between the tooth and the front piece.
[0036] It is further an object to provide a solution where the tooth is composed of a posterior tooth part and an anterior tooth part, where the anterior and posterior tooth part are rigidly connected through the described In-line connection.
[0037] Summary of the invention
[0038] The above objects are achieved by the front of the front piece having integrated moment arms that extend out from the front piece, while the teeth have integrated moment arms that extend backwards.
[0039] A preferred embodiment of the present invention is specified in the independent claims 1 and 20, while alternative embodiments are specified in the independent patent claims.
[0040] The moment arms on the front piece and the moment arms on the teeth can have a design and internal spacing that allows them to overlap each other in the horizontal plane when the front piece and tooth are connected.
[0041] The free end of the moment arms on the tooth may be designed to mechanically engage towards the front of the front piece. The free end of the moment arms on the front piece is designed to mechanically connect to the back of the tooth.
[0042] This connection provides a vertically rigid connection between the front piece and the tooth, and the length of the moment arms will regulate the shear forces in the connection as well as the bending moment in the teeth. Long moment arms might provide low shear forces in the connection between tooth and front piece, as well as reducing bending stresses in the most exposed areas.
[0043] The moment arms from the front piece and the teeth can overlap each other in the horizontal plane, thus achieving a connection that also absorbs lateral forces.
[0044] The teeth can be connected to the front piece by pushing the teeth horizontally towards the front piece so that the connecting surfaces at the ends of the moment arms of the teeth engage with the connecting surfaces on a front of the front piece. The moment arm on the front piece is adapted in length so that its end connects to the connecting surface of the tooth at the same time as the moment arm on the tooth connects to the front piece.
[0045] To ensure that the teeth are not pulled out of the front piece uncontrollably, the moment arms belonging to the teeth are connected to the moment arm from the front piece through a horizontal or vertical connection that can be removed if you want to replace tooth. The connection will thus be able to absorb all forces and moments between the front piece and the tooth.
[0046] The further described connection may allow the teeth and / or moment arms to have a different angle than the front piece, so that the teeth can be angled downwards in relation to the front piece. The moment arms can be of different lengths within a bucket to achieve the optimal combination between strength and protection of areas exposed to wear.
[0047] The teeth may have a height that is less, equal to, or greater than the thickness of the front piece. The moment arm belonging to the front piece will advantageously have the greatest width closest to the root of the moment arm, and then gradually decrease in width towards the connection surface of the teeth, so that the tooth has sufficient width where it gets the greatest bending moment. A solution for mounting a tooth front against an existing tooth is further described, using the same principles as for attaching a tooth to a front piece.
[0048] Description of figures
[0049] Preferred embodiments of the invention shall be discussed in more detail below with reference to the accompanying figures, wherein:
[0050] Figure 1 shows a bucket where the teeth are not mounted.
[0051] Figure 2 shows the bucket where the teeth are mounted.
[0052] Figure 3 shows the bucket seen from the front where the teeth are mounted.
[0053] Figure 4 shows the bucket seen from the side where the teeth are mounted.
[0054] Figure 5 shows the bucket where the front piece and teeth are not mounted.
[0055] Figure 6 shows the front piece where the teeth are not mounted.
[0056] Figure 7 shows the connection between the tooth and the front piece.
[0057] Figure 8 shows another angle of parts of the front piece and tooth.
[0058] Figure 9 shows the use of a intermediate piece between front piece and teeth.
[0059] Figure 10 shows the use of a intermediate piece between front piece and adapter.
[0060] Figure 11 shows bucket seen from above where the corner teeth protect the front piece.
[0061] Figure 12 shows a tooth where one moment arm is longer than the other.
[0062] Figure 13 shows the front piece with front protection and teeth.
[0063] Figure 14 shows the front piece and teeth with integrated front protection.
[0064] Figure 15 shows the bucket seen from the side where the tooth has a different angle than the front piece.
[0065] Figure 16 shows the front piece where the tooth is angled downwards and lies in front of the wear piece. Figure 17 shows bucket where the teeth are shaped in a way that forms a smooth front on the front of the bucket.
[0066] Figure 18 shows bucket where the teeth have been replaced with a new front piece.
[0067] Figure 19 shows bucket where two of the teeth in the centre are attached by going into the front piece.
[0068] Figure 20 shows bucket where two of the teeth in the centre are attached by going into the front piece, where the teeth are shown in front of the front piece.
[0069] Figure 21 shows a bucket where two of the teeth in the centre are attached to an intermediate piece, where the intermediate piece is further attached to the front piece.
[0070] Figure 22 shows the bucket where the intermediate piece and tooth are disconnected from the front piece.
[0071] Figure 23 shows in principle how the tooth and the front piece can be machined out of the same plate.
[0072] Description of preferred embodiments of the invention
[0073] Fig 1 shows a bucket 10 according to the invention, which includes a massbearing device where a front piece 20 is mounted arranged to be connected to a plurality of teeth 30.
[0074] The front piece 20 is cut out of a plate that has a thickness that corresponds to the forces to which the front piece 20 is subjected. The length of the 20 front piece is matched to the width of the bucket 10, and the plurality of teeth is selected based on the length of the 20 front piece. For every tooth 30 that is to be mounted on the front of the front piece 20, a plurality of moment arms 22 extending from the front piece 20 are arranged. At the free end of the moment arms 22 are provided with an outer connection surface 23, which when connected to the tooth 30's inner connection surfaces 31 form a connection 100 as shown in Fig. 2. Fig 3 shows the bucket 10 seen from the front, here shown with four teeth 30.
[0075] Fig 4 shows the bucket seen from the side, where the front piece 20 has the same thickness as the tooth 30. Fig 4 further shows a tooth 30 connected horizontally to the front piece 20.
[0076] Fig 5 shows bucket 10 where the front piece 20 is disconnected from bucket 10 and the teeth are pulled forward.
[0077] Fig 6 shows the front piece 20 which is arranged with a plurality of inner connection surfaces 21 located within the moment arms 22, and when the inner connection surfaces 21 are connected to the outer connection surfaces 33 the tooth 30, the connection 100 is formed as shown in Fig. 2.
[0078] Moment arms 22 can be directly machined in the front piece 20 or attached by means of, for example, bolts or welding. Moment arms 22 can be identical within a bucket 10, or have different lengths and angles depending on where they are placed in the bucket 10.
[0079] On teeth 30 that are placed in the outer sides of the bucket 10, you will typically have different angle than on teeth 30 which are located more in the centre of the bucket 10. This can be achieved by the moment arms 22 having a different lateral angle from the front piece 20 than, for example, moment arms 22 which are located in the centre of the bucket 10.
[0080] The teeth 30 are provided with at least one inner connection surface 31 and at least one moment arm 32 with associated outer connection surface 33.
[0081] When the tooth 30 is permanently mounted on the front piece 20, the moment arm 32 will laterally overlap the moment arm 22 so that together they will form a horizontal surface as shown in Fig. 2. In a posterior part of the moment arm 22 and the moment arm 32, it is provided connecting surfaces 23,33.
[0082] Fig 7 shows a preferred embodiment where the tooth 30 is connected to the front piece 20, and where the connection 150 itself is located within the dotted area comprising the moment arm 22 connected to the tooth 30 in the connection 100 and moment arms 32 connected against the front piece 20 in the connection 100.
[0083] Fig 8 shows outer connecting surfaces 23 and 33 as horizontal square blocks 115 forming depressions 110, where blocks 115 can be formed as trapezoids or other shapes to achieve the desired connection 100. The connecting surfaces 23 and 33 are located at the end of the moment arm 22 and the moment arm 32, for some applications, the connection surfaces 23 and 33 can be guided along the sides of the moment arms.
[0084] For increased strength, a wedge connection can be used to achieve the connection 100, where wedges are inserted that form a vertical connection 100 between the connection surface 33 and the connection surface 21 and the connection surface 23 and the connection surface 31.
[0085] The connection 100 will mainly take place in a posterior part of the moment arm 22 and the moment arm 32, but for some applications it will be possible to round to limit local stresses in the connection 100.
[0086] Fig 8 shows the preferred milling of groove 110 in the front piece 20 to achieve the connection 100, this by keeping as much material as possible in the upper and lower side of the front piece 20 so that the moment arm 22 will be able to absorb the greatest possible bending moment.
[0087] The moment arms 22 and moment arms 32 will be able to bend independently of each other during normal operation. Efforts will also be made to ensure that the moment arms are designed in a way that provides an even moment load over the length of the moment arms. This is achieved by varying the width the moment arm 22 and the moment arm 32 as a function of the length of the moment arm.
[0088] As a general rule, the moment arm 22 will be thickest towards the front piece 20, and the moment arm 32 will be thickest towards the tooth 30. By increasing the length of the moment arms 22 and 32 one will be able to reduce the shear forces in the connection 100, which in turn will allow increased width of the moment arms where they are exposed to the greatest bending moment.
[0089] Fig 9 shows a solution where a spacer 80 is used, which on a rear side is formed as a rear side tooth 30 with moment arms 32 and connection surface 33, and on a front side is designed with moment arm 22 and connection surface 33. Intermediate piece 80 as shown in Fig. 9 is intended to be able to extend the tooth 30, as well as increase the flexibility of parts you want to change.
[0090] Fig 10 shows a part of the front piece 20 with associated moment arm 22, where a detachable tooth 30 in its front part can be provided with Interface 200 adapted to various industry standards in the field of removable bucket teeth’s.
[0091] Fig 11 shows a bucket 10 where the side15 are pulled outwards and attached to the moment arm 22 to increase strength.
[0092] The corner teeth 30 are further provided with a longer moment arm 32 on the outermost side of the tooth 30 than on the inside of the canine to better protect the side of the front piece 20. For some applications, it may be appropriate to have a tooth 30 thicker than a front piece 20, so that normal wear and tear through use accrues to the replaceable tooth 30 instead of the front piece 20.
[0093] When the front piece 20 is connected to the teeth 30, the moment arms 22 and 32 will be locked in relation to each other in all directions except in horizontal direction where the tooth 30 can be moved back and forth in relation to the front piece 20.
[0094] To ensure that tooth 30 is not pulled from the front piece 20 uncontrollably, locking bolts 70 are used as shown in Fig. 11 . The locking bolts lock the moment arm 22 relative to the moment arm 32. Lock bolts 70 will be arranged in a way that ensures that moment arms 22 and 32 are allowed to land off in the connection 100 so that forces acting inwards towards the tooth 20 are not absorbed by bolt 70.
[0095] Bolt 70 can interlock moment arms 22 and 32 in the horizontal plane by inserting bolt 70 vertically or horizontally into a machined groove 75 in moment arms 22 and 32. One can use several bolts 70 and different known principles for fastening bolt 70.
[0096] As shown in Fig. 11 , the length of moment arms 22 and 32 can be of varying lengths to avoid having all the forces in the same plane. Fig 12 shows a tooth 30 where the two moment arms 32 have different lengths. To prevent the connection 100 from going laterally, the end of the moment arms 22 and 32 can be slanted or pointedly designed, Fig. 11 shows that the connection 100 on corner tooth can be tilted so that the outer moment arm 32 is locked against an end side of the front piece 20.
[0097] Fig 13 shows the front piece 20 with attached front protectors 40 attached to the front piece 20, the rear part of moment arms 32 is guided between moment arms 22 and front protectors 40 so that moment arms 32 are locked against lateral movement. Fig 14 shows a tooth 30 with integrated front protectors, in that moment arms 32 at its rear edge protect the front piece’s 20 normally open area between teeth 30.
[0098] Fig 15 shows a bucket 10 seen from the side with teeth 30 and moment arms 32 with an angle I3> in relation to the front piece 20, so that the teeth 30 point downwards in relation to the front piece 20. On the underside of the front piece 20, protective plates 90 are placed that extend along moment arms 22 and further backwards the front piece 20. Protective plates 90 can be screwed or welded to moment arms 22 and on the top and bottom side of the front piece 20 and can be further used to strengthen moment arms 22 and the front piece 20.
[0099] Fig 16 shows the underside of a bucket 10 where teeth 30 are slanted in relation to the front piece 20. Protection plate 90 is protected at the front edge by teeth 30 that come down in front of protection plate 90, and on the sides, the front part of protection plate 90 is protected by moment arms 32. This combination of protection plate 90 and interchangeable angled tooth 30 forms a preferred protection of moment arms 22.
[0100] Fig 17 shows an embodiment of teeth 30 where they cover the entire front piece 20, while Fig 18 shows a front piece 35 connected to four moment arms 22.
[0101] Fig 19 shows an embodiment where the two teeth 30 in the centre of the front piece 20 are recessed into the front piece 20, so that the tooth 30 has a moment arm 32 that connects to the inner connection surface 21 recessed in the front piece 20. The connection surface 23 on the front piece is here on a front side of the front piece 20 which is connected to the connection surface 31 on the tooth 30 and forms the connection 100.
[0102] Fig 20 shows teeth 30 in one position in front of the front piece 20, Fig 21 shows an embodiment where the two teeth 30 in the centre of the front piece 20 are attached to a front part of the intermediate piece 85, to which the rear part of the intermediate piece 85 is attached against the front piece20.
[0103] Fig 22 shows the intermediate piece 85 and the tooth 30 placed in front of the front piece 20. The intermediate piece 85 comprises a moment arm that on its front side goes into the tooth 30, and where its rear part goes into the front piece 20. From each side of the intermediate piece 85 there are intermediate piece pins 86.
[0104] The tooth’s 30 moment arms 32 with its connection surfaces 33 connects to the inner connection surface 21 which is located on the front part of the intermediate piece pins 86, while the front part of the moment arm intermediate piece 85 connects to the connection surface 31 in the tooth 30. The rear of the intermediate piece 85 is connected to the connecting surface 21 of the front piece, while the connecting surface 23 of the front piece 20 is connected to a rear side of the intermediate piece pins 86.
[0105] Fig 23 shows in principle how tooth 30 and front piece 20 can be machined out of the same plate.
Claims
AMENDED CLAIMS received by the International Bureau on 18 February 2026 (18.02.2026).1 . A bucket (10) with attached front piece (20), for coupling of teeth (30), where the front piece (20) comprises at least an inner coupling surface (21 ) and at least a moment arm (22) with associated outer coupling surface (23), each tooth (30) comprises at least an inner coupling surface (31 ) and at least a moment arm (32) with associated outer coupling surface (33), where moment arms (22) of the front piece (20) are arranged side by side with moment arms (32) of each tooth (30), characterised in that the outer coupling surface (33) of each tooth (30) is arranged to be coupled to the inner coupling surface (21 ) of the front piece (20), and the outer coupling surface (23) of the front piece (20) is arranged to couple to the inner coupling surface (31 ) of each tooth (30).
2. Bucket (10) according to claim 1 , characterised in that a tooth (30) comprises two or more moment arms (32), where said moment arms (32) have equal or different lengths.
3. Bucket (10) according to claim 1 -2, characterised in that the front piece (20) inside has inner coupling surfaces (21 ) in different distances in relation to the outer coupling surface (23).
4. Bucket (10) according to claim 1 -3, characterised in that parts of a side wall (15) are rigidly attached to the moment arm (22) of the front piece (20).
5. Bucket (10) according to claim 1 -4, characterised in that the moment arm (32) of said teeth (30) is guided along an end side of the front piece (20).
6. Bucket (10) according to claim 1 -5, characterised in that at least a locking bolt (70) is connected to tracks (75) in the moment arm (22) of thefront piece (20) and tracks (75) in the moment arm (32) of said teeth (30) and which forms a locking between the moment arms (22, 32).
7. Bucket (10) according to claim 1 -6, characterised in that the moment arm (32) of said teeth (30) in its outer part is formed in a way locking it laterally to the front piece (20).
8. Bucket (10) according to claim 1 -7, characterised in that the moment arm (32) of said teeth (30) is laterally locked by means of a front protector (40).
9. Bucket (10) according to claim 1 -5, characterised in that the moment arm (32) of said teeth (30) has a built-in front protector (40).
10. Bucket (10) according to claim 1 -9, characterised in that a tooth (30) has a larger thickness than the front piece (20).11 . Bucket (10) according to claim 1 -10, characterised in that the outer coupling surface (23) of the front piece (20) is provided with horizontal tracks (110) overlapping with horizontal profiles (115) in the inner coupling surface (31 ) of said teeth (30), which in turn forms a vertical coupling (100) between coupling surfaces (23, 31 ).
12. Bucket (10) according to claim 1 -11 , characterised in that the outer coupling surface (33) of said teeth (30) is provided with a horizontal profile (110) overlapping with a horizontal profile (115) in the inner coupling surface (21 ) of the front piece (20), which in turn forms a vertical coupling (100) between the coupling surfaces (33, 21 ).
13. Bucket (10) according to claim 1 -12, characterised in that the moment arm (22) of the front piece (20) and the moment arm (32) of said teeth (30) have varying width.
14. Bucket (10) according to claim 1 -13, characterised in that the moment arm (22) of the front piece (20) and the moment arm (32) of said teeth (30) have varying height.
15. Bucket (10) according to claim 1 , characterised in that a removable intermediate piece (80) is placed between the front piece (20) and said teeth (30).
16. Bucket (10) according to claim 1 , characterised in that a tooth (30) has a different angle than the front piece (20) when the tooth (30) is connected to the front piece (20).
17. Bucket (10) according to claim 1 , characterised in that the moment arm (22) of the front piece (20) has a different angle than the front piece (20).
18. Bucket (10) according to claim 1 , characterised in that a tooth (30) has a different angle than the moment arm (32) of the tooth (30).
19. Bucket (10) according to claim 1 , characterised in that a removable intermediate piece (80) is provided with Interface (200) for mounting of standard types of tooth caps.
20. A bucket (10) with attached front piece (20), for coupling of teeth (30), where the front piece (20) comprises at least an inner coupling surface (21 ) and at least an outer coupling surface (23), the teeth (30) comprise at least an inner coupling surface (31 ) and at least a moment arm (32) with associated outer coupling surface (33), an intermediate piece (32) comprises a moment arm, which on its front side and rear side has an outer coupling surface (83), where the intermediate piece (85) further comprises intermediate piece pins (86) projecting out from each side of the intermediate piece (85),characterised in that the outer coupling surface (33) of said teeth (30) is arranged to connect to the front side of the intermediate piece pins (86), and the front outer coupling surface (83) of the intermediate piece (85) is arranged to connect to the inner coupling surface (31 ) of said teeth (30), the outer coupling surface (23) of said front piece (20) is arranged to connect to the rear side of intermediate piece pins (86), and the rear outer coupling surface (83) of the intermediate piece (85) is arranged to connect to the inner coupling surface (21 ) of said front piece (20).