SUPPORT CROSS FOR A MEAT GRINDER

Description

[0001] The invention relates to a support cross for a meat grinder.

[0002] Examples of generic support crosses are disclosed, for example, in DE 202014104033U1 and EP 0467428A1.

[0003] Meat grinders typically use a multi-part cutting set that chops the material to be chopped, fed via a working screw, to the desired size in several chopping steps, for example using a pre-cutter, one or more knives and perforated discs. The final element of such a cutting set is usually a support cross. During the chopping process, the knives are mounted on a drivable, rotating knife pivot, so that they rotate together with the knife pivot. For this purpose, they have a central recess adapted to the cross-section of the knife pivot. The pre-cutter, the perforated discs and the support cross, on the other hand, are arranged in the housing of the meat grinder in a rotationally fixed manner and have a central bore for the knife pivot.

[0004] In known meat grinders according to the utility model DE 20 2020 105 051.6 or DE 20 2020 105 052.4, the knife pin is connected at one end to the conveyor screw in a rotationally fixed manner and, starting from the connection point with the conveyor screw, has an axially extending support section on which the knives are mounted. During assembly, the knife pin is inserted with its one end, the insertion end, into the bearing bore of the conveyor screw. The fastening ring, which is pushed onto the knife pin and rests against the stop surface of the knife pin, is then connected to the conveyor screw. This connection is a detachable connection. When disassembling the knife pin, recesses 21 are provided on the fastening ring to facilitate the loosening of the screw connection (see Fig. 2 , or notches 22, see Fig. 4 , which provide access for suitable tools when loosening the screw connection.

[0005] The object of the present invention was to simplify the assembly or disassembly of the known knife pins.

[0006] This object is achieved with a support cross for meat grinders having the features of claim 1. Advantageous embodiments are described in the subclaims.

[0007] A new support cross is proposed for a meat grinder. This cross comprises, in a known manner, a hub with a central bore, an outer ring, and several webs extending between the hub and the outer ring. A groove is provided on the outside of the outer ring for the rotationally fixed mounting of the support cross in the meat grinder. This support cross also serves as a tool. Thus, one or more elements with a tool function are located in the area of ​​the hub.

[0008] In one embodiment, such elements are present as lugs on one end face of the hub. These elements can serve as engagement elements, for example, when dismantling the knife pivot. According to this embodiment, the lugs protrude from the end face of the hub, i.e. from the front or back of the support cross. The arrangement of the lugs is important. After removing the cutting elements from the meat grinder, the fastening ring must be loosened in order to dismantle the knife pivot described above. This fastening ring holds the knife pivot in the conveyor screw. For this purpose, the support cross is pushed onto the knife pivot and turned so that the lugs on the support cross are aligned with corresponding recesses or notches in the fastening ring. The support cross is pressed against the fastening ring, and the lugs engage in the recesses or notches in the fastening ring. The fastening ring can now be loosened by turning the support cross.

[0009] The new support cross, together with a locking nut, clamps the elements of the cutting set in the meat grinder housing in a known manner. Furthermore, the new support cross has an additional function, namely a tool function. In one embodiment of the invention, it can serve as an assembly or disassembly tool for the knife pivot. Advantageously, no additional tools are required for assembly and disassembly of the knife pivot.

[0010] The invention is explained in more detail below using three exemplary embodiments and the drawings. The drawing shows: Fig. 1 a perspective view of a support cross according to the invention, Fig. 2 a known knife pin before assembly, Fig. 3 a perspective view of another support cross, Fig. 4 another known knife pin before assembly, Fig. 5 a front side of another support cross according to the invention, Fig. 6 a sectional view of the support cross according to Fig. 5 , Fig. 7a side view of a bearing bush, Fig. 8a front view of a bearing bush.

[0011] The support cross 10 shown in the figures is the last element of a cutting set in the meat grinder. This support cross 10 has Fig. 1 three webs 12, which connect an outer ring 13 and a central hub 11. A central bore 15 is provided in the hub 11. In this central bore 15, the knife pin 30, shown in Fig. 2 , are rotatably mounted. In this example, the hub 11 has two lugs 16, 16' on its front surface. For the rotationally fixed mounting of the support cross 10 in the meat grinder, a groove 14 is provided on the outer ring 13. This groove interacts with a corresponding key on the housing wall of the meat grinder and thus prevents any rotational movement of the support cross 10 during the mincing process. To assemble and disassemble the elements of the cutting set, the key is removed, allowing a rotational movement of the support cross.

[0012] Fig. 2 shows the conveyor screw 40, the knife pin 30 and the fastening ring 20 used to connect the knife pin 30 to the conveyor screw 40. In addition, two sealing rings 50, 51 are provided in this embodiment. The knife pin 30 is inserted into the conveyor screw 40 at one end. The fastening ring 20, which has a suitable thread for a screw connection to the conveyor screw 40, is pushed over the knife pin 30. The support cross 10 is then pushed over the narrower part of the knife pin 30 and the support cross 10 is aligned so that the two lugs 16, 16' can engage in the two recesses 21. Once the support cross 10 is pressed tightly against the fastening ring 20, the support cross 10 can be rotated. The webs 12 of the support cross provide a handle for this purpose.The rotational movement of the support cross 10 is transmitted to the fastening ring 20 by the engagement of the lugs 16, 16' in the recesses 21, thus tightening the screw connection to the conveyor screw 40. Disassembly of the knife pin 30 is also carried out with the aid of the support cross 10. Therefore, no additional tools are required.

[0013] In a further embodiment of the support cross 10, shown in Fig. 3 , there are also two lugs 16, 16' diametrically opposite each other on the front side of the hub 11. In this case, the lugs 16, 16' are located on the outer edge of the hub 11. This arrangement has been chosen so that the lugs 16, 16' fit into the edge notches 22 of the fastening ring 20', shown in Fig. 4 , can intervene. The assembly and disassembly process of the knife pin 30 with the help of the support cross 10 from Fig. 3 is done as described in the previous example.

[0014] In a third embodiment of the support cross 10, shown in Fig. 5 und Fig. 6 , the support cross 10 has a bearing bush 17 accommodated in the central bore 15. Such bearing bushes 17 are used in support crosses and cutting elements of the meat grinder so that after a certain period of operation only the bearing bush needs to be replaced and not the support cross or cutting element. In this embodiment of the support cross 10, the two lugs 16, 16' are located diametrically opposite each other on the front side of the bearing bush 17. In the side view of the bearing bush 17 in the Fig. 7 It is clear that the lugs 16, 16' protrude from the front. Here, too, the lugs 16, 16' are provided on the outer edge of the bearing bush 17, see Fig. 8 . The bearing bush 17 has an inner bore in which the knife pin 30, shown in Fig. 2 , can be mounted in a rotatable manner.

[0015] The bearing bush 17 has a front area of ​​larger outer diameter - left side in Fig. 7 and a rear area with a smaller outer diameter - right side in Fig. 7 . The hub 11 of the support cross 10 has a central bore 15 with two areas, each with a different inner diameter, forming a step. The assembly and disassembly process of the knife pin 30 using this support cross 10 from Fig. 5 is carried out as already described. The step inside the hub 11 prevents the bearing bush 17 from being pushed backward through the central bore 15 during assembly or disassembly. It forms a stop area for the front section of the bearing bush 17.

[0016] In another embodiment of the bearing bush, the front area with a larger outer diameter is also designed as a ring, but the rear area has a shape that differs from the round ring, for example, it has an oval circumferential line in cross-section. List of reference symbols

[0017] 10Support cross 11Hub 12Webs 13Outer ring 14Groove 15Central bore 16, 16Lubricants 17Bearing bush 20Fastening ring 21Recess 22Notch 30Knife pin 40Conveyor screw 50, 51Sealing rings

Claims

1. A cross-shaped support for a meat grinder, - comprising a hub (11) with a central bore (15), an outer ring (13) and a plurality of webs (12) which extend between the hub (11) and the outer ring (13), - with a groove (14) on the outside of the outer ring (13) for non-rotatable mounting in the meat grinder, characterised, - that in the area of the hub (11) there are one or more noses (16, 16') that have a tool function, - namely, the one or more noses (16, 16') are arranged on an end face of the hub (11), which project away from the end face or - a bearing bushing (17) is held in the central bore (15) of the hub (11) and has one or more noses (16, 16') on its front side, which protrude away from the front side.

2. The cross-shaped support according to claim 1, characterised in that the two noses (16, 16') are arranged diametrically opposite one another on the end face.

3. The cross-shaped support according to claim 1 or 2, characterised in that the protruding noses (16, 16') are located on the outer edge of the hub (11) or the bearing bushing (17).

4. The cross-shaped support according to claim 1, characterised in that the bearing bushing (17) has two areas of different outside diameters, namely a front area with a larger outside diameter and the central bore (15) of the hub (11) for this bearing bushing (17) has a corresponding level.

5. The cross-shaped support according to one of claims 1 to 4, characterised in that the rear region has a shape deviating from the round ring, for example has on oval cross-section perimeter.