Device for mounting or dismounting a shaft nut

Abstract

Device for mounting or dismounting a shaft nut (30), comprising: - a cylindrically shaped central body (20) with a length of at least 150 mm and a cavity (21) formed along the length of the central body (20), which has a diameter of at least 80 mm, - a claw element (22) arranged at a first axial end of the central body (20) with a plurality of claws (23), which is arranged to engage in grooves of a shaft nut (30) by means of the claws (23) for the transmission of torque to the shaft nut (30), and - an actuating element arranged on the central body (20), wherein the device is open at least at the first axial end towards the cavity (21).

Description

[0001] The invention relates to a device for assembling or disassembling a shaft nut. background

[0002] Shafts are often mounted in a housing using shaft nuts, which ensure secure and precise fixation of the shaft within the assembly. Mounting shaft nuts in hard-to-reach positions regularly presents challenges. Summary

[0003] The object of the invention is to provide a device with which difficult-to-access shaft nuts can be reliably installed and / or removed.

[0004] A device according to claim 1 has been created to solve the problem. The dependent claims relate to further embodiments.

[0005] According to one aspect of the invention, a device for assembling or disassembling a shaft nut has the following features: - a cylindrically shaped central body with a length of at least 150 mm and a cavity formed along the length of the central body, which has a diameter of at least 80 mm, - a claw element arranged at a first axial end of the central body with a plurality of claws, which is designed to engage (positively locking) in grooves of a shaft nut by means of the claws for torque transmission to the shaft nut, and - an actuating element arranged on the central body, wherein the device is open towards the cavity at least at the first axial end.

[0006] The device according to the invention can be guided around a corresponding shaft during the assembly or disassembly of the shaft nut, such that the shaft is received in the cavity. In this way, shaft nuts can be accessed for assembly or disassembly even in difficult-to-reach locations deep inside a housing, especially in cases where the housing is formed directly around the shaft and the shaft can only be removed after the shaft nut has been loosened. This not only saves working time but also enables damage-free disassembly, particularly with self-locking nuts. Furthermore, assembly can be carried out without impact, thus substantially reducing the risk of bearing damage.

[0007] The central body can have a length between 150 mm and 450 mm, preferably between 300 mm and 400 mm, and particularly preferably about 350 mm. The cavity can be designed such that a shaft or shaft stub can be partially or completely accommodated longitudinally within the cavity. Specifically, the cavity can be dimensioned such that the shaft is guided, at least partially, by sliding motion when accommodated within the cavity.

[0008] The shaft nut can be designed to fasten the shaft (for example, within a housing), particularly as part of an agitator. The shaft can, for example, have a length between 100 mm and 500 mm, preferably between 150 mm and 250 mm, and most preferably about 200 mm.

[0009] The claw element can be formed integrally with the central body. For example, the claw element can be welded to the central body or machined from the central body. Specifically, the claw element can also be machined from the central body, for example, by cutting.

[0010] Alternatively, the claw element can be detachably (e.g., pluggably) and / or interchangeably attached to the first axial end of the central body. In this way, claw elements can be provided for different shaft nut sizes or connection types.

[0011] The claw element can, for example, have between four and ten claws, preferably six claws. The claws can be essentially cuboid in shape.

[0012] In particular, the claw element can be attached to the central body by means of a snap-fit ​​connection or, preferably, by means of a plug-in connection. Additionally, the claw element can be fixed to the central body by means of at least one screw connection, preferably several screw connections. The one or more screw connections can be located laterally on the claw element and laterally on the central body.

[0013] The shaft nut can be a KM slotted nut. The jaws can be designed to engage in the grooves of a KM slotted nut with an outer diameter between 52 mm and 180 mm, preferably between 70 mm and 98 mm, and particularly preferably 80 mm. For example, a KM slotted nut of KM50 to KM120, preferably KM70 to KM90, and particularly preferably KM80, can be provided.

[0014] The central body can be closed at a second axial end, opposite the first axial end, by means of a wall (for example, a sheet metal plate) along a base surface of the central body. The actuating element can be arranged on this wall. For example, the wall can be welded to the cylindrical outer part of the central body.

[0015] Alternatively, the central body can also be open at the second axial end towards the cavity. This allows shaft nuts to be mounted and / or dismounted for shafts of any length. In this embodiment, the actuating element can be attached to a cylindrical surface of the central body and / or circumferentially at the second axial end.

[0016] The actuating element can be detachably attached to the wall. Alternatively, the actuating element can be permanently (not detachable without damage) connected to the wall (e.g., welded).

[0017] The actuating element can have a connection for a wrench (especially a ratchet wrench, ring wrench, or open-end wrench) at a center point of the wall (in particular along an axis of symmetry and / or axis of rotation of the central body). The connection can be aligned along the axis of symmetry and / or axis of rotation. In this way, torque can be transmitted by means of the wrench.

[0018] Specifically, the connection can be formed with an external hexagonal shape (e.g., as a hexagonal nut). The connection can be formed in particular with an M15, an M20, or an M24 nut (e.g., for a 36 mm socket). Advantageously, various tools with a single wrench size, such as open-end / ring wrenches, ratchets, or impact wrenches, can be used with a (possibly welded) nut.

[0019] The device (in particular at least one of the central body, claw element, and actuating element) can be made at least partially, and in particular entirely, of stainless steel. The steel can be, for example, an austenitic steel (such as X5CrNi18-10), an austenitic-ferritic steel (such as X2CrNiN22-2), or a martensitic steel (such as X15Cr13). The central body can also be made of, for example, aluminum.

[0020] In the context of this disclosure, interval specifications (“between”, “from ... to”) are to be understood as encompassing the interval ends. The embodiments described herein with respect to a first entity, such as a first data processing device or first image data, can be provided analogously for a corresponding second and / or third entity. In general, terms such as “first”, “second”, and “third” are used for descriptive purposes only and should not be understood as indicating or suggesting a relative meaning or set of the specified technical features. In the description of this application, the expression “a plurality of” or “a multitude of” means “at least two”, for example, “two or three”, unless otherwise specified. Description of exemplary implementations

[0021] Further examples of implementation are explained in more detail below with reference to the drawings. These show: Fig. 1 a schematic representation of a shaft partially inserted into a housing, Fig. 2 a schematic representation of a section of the device for assembling or disassembling a shaft nut and Fig. 3 A schematic representation of a section of the device including the shaft nut. Detailed description

[0022] Fig. Figure 1 shows a schematic representation of a shaft 10, which is partially inserted into a housing 12, as part of an agitator. For fastening the shaft 10, it has an external thread (shaft thread 11) at one end to be positioned inside the housing 12. It is fastened by means of a shaft nut 30 (see Figure 1). Fig. 3) with internal thread (shaft nut thread 31) on the shaft thread 11. When the shaft 10 is inserted into the housing 12, the shaft nut is difficult to access for potential disassembly, during which the installed components should remain intact. For example, a housing opening 13, through which the shaft 10 is guided, does not provide enough space to insert a hook wrench.

[0023] For the reliable assembly and disassembly of hard-to-reach shaft nuts, the device according to the invention comprises a cylindrically shaped central body 20 with a cavity 21 extending along the length of the central body 20, a claw element 22 with a plurality of claws 23 arranged at a first axial end of the central body 20, and an actuating element (not shown) arranged on the central body 20. The device is open at least at its first axial end towards the cavity 21, so that the shaft 10 can be received in the cavity 21. The actuating element can, for example, have a connection with a hexagonal nut, which is centrally attached to a wall at a second axial end opposite the cavity 21. A wrench can then be placed on the hexagonal nut so that torque can be transmitted to the device and thus to the shaft nut 30.

[0024] To accommodate shafts 10 of suitable size, the central body 20 and the cavity 21 have a length of at least 150 mm and the cavity 21 a diameter of at least 80 mm. The claws 23 are designed to engage in grooves 32 of the shaft nut 30 for torque transmission to the shaft nut 30 (see figure). Fig. 3).

[0025] In the present embodiment, the claws 23 are formed integrally with the central body 20. Alternatively, the claw element 22 can also be detachably attached to the central body 20, for example by means of a plug connection.

[0026] The features disclosed in the foregoing description, the claims and the drawing can be important for the realization of the various embodiments, both individually and in any combination.

[0027] The present disclosure is not limited to the embodiments described above, but can be modified by a person skilled in the art within the scope of the claims. The present disclosure also encompasses, within its technical scope, any embodiment derived by combining technical means that may be disclosed in different embodiments. Reference symbol list 10 wave 11 shaft threads 12 cases 20 Central body 21 cavity 22 Claw element 23 claws 30 shaft nuts 31 Shaft nut thread 32 grooves

Claims

[1] Device for mounting or dismounting a shaft nut (30), comprising: - a cylindrically shaped central body (20) with a length of at least 150 mm and a cavity (21) formed along the length of the central body (20), which has a diameter of at least 80 mm, - a claw element (22) arranged at a first axial end of the central body (20) with a plurality of claws (23), which is arranged to engage in grooves of a shaft nut (30) by means of the claws (23) for the transmission of torque to the shaft nut (30), and - an actuating element arranged on the central body (20), wherein the device is open at least at the first axial end towards the cavity (21). [2] Device according to claim 1, wherein the claw element (22) is formed integrally with the central body (20). [3] Device according to claim 1, wherein the claw element (22) is detachably attached to the first axial end of the central body (20). [4] Device according to claim 3, wherein the claw element (22) is attached to the central body (20) by means of a plug connection. [5] Device according to one of the preceding claims, wherein the claws (23) are designed to engage in grooves of a KM slotted nut with an outer diameter between 52 mm and 180 mm, preferably 80 mm. [6] Device according to one of the preceding claims, wherein the central body (20) is closed at a second axial end, which is arranged opposite the first axial end, by means of a wall along a base surface of the central body (20) and the actuating element is arranged on the wall. [7] Device according to claim 6, wherein the actuating element is detachably attached to the wall. [8] Device according to claim 6 or 7, wherein the actuating element has a connection for a wrench at a midpoint of the wall. [9] Device according to claim 8, wherein the connection is formed with an external hexagon shape. [10] Device according to one of the preceding claims, wherein the device is at least partially made of stainless steel.

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