Clamping ring for receptacles

Abstract

Clamping ring (100), in particular for clamping a plug-in sleeve (200) on a shaft, having a receptacle (3) for a clamping screw (33), a radial clamping gap (5), and at least two and / or a maximum of four radial elevations (1a-c), wherein the receptacle for the clamping screw and the clamping gap are arranged in one of the radial elevations.

Description

Field of the invention

[0001] The disclosure relates to a clamping ring for plug sleeves. State of the art

[0002] Clamping rings for connecting shafts and plug-in sleeves are known from the state of the art.

[0003] EP 3 642 501 B1 describes a clamping ring with a rounded bulge on the clamping ring for accommodating a screw. However, in some applications, an even higher clamping force is desirable with compact dimensions and the smallest possible cross-section of the screw. Disclosure of the invention

[0004] The object of the invention is to provide a clamping ring for connecting a shaft and a plug-in sleeve that is improved over the prior art. In particular, a clamping ring for connecting a shaft and a plug-in sleeve and a connection are to be provided that enable the highest possible clamping force with low inertia, good balancing quality, and low manufacturing costs.

[0005] The object is achieved with a clamping ring according to claim 1 and a connection and a use according to the independent claims.

[0006] A first aspect relates to a clamping ring, in particular for clamping a plug-in sleeve on a shaft. The clamping ring has a receptacle for a clamping screw, a radial clamping gap, and at least two and / or a maximum of four radial elevations, wherein the receptacle for the clamping screw and the clamping gap are arranged in one of the radial elevations.

[0007] A further aspect relates to a connection comprising a shaft, a plug-in sleeve, and a clamping ring according to one of the embodiments described herein, wherein the clamping ring is applied to the plug-in sleeve.

[0008] A further aspect relates to a use of a clamping ring according to one of the embodiments described herein for clamping a plug sleeve on a shaft.

[0009] Where a list below contains “or”, this means “and / or” unless otherwise stated.

[0010] In typical embodiments, the clamping ring comprises at least two or a maximum of four radial elevations. In particular, the clamping ring comprises two, three, or four radial elevations. In embodiments, not all or none of the radial elevations are symmetrical with respect to a radial axis, in particular in the circumferential direction. In particular, at least one of the radial elevations is asymmetrical with respect to a radial axis. In embodiments, a majority of the radial elevations, in particular all radial elevations, have the same contour. A clamping ring with a plurality of, in particular three, radial elevations advantageously enables a clamping force that is evenly distributed over the circumference of the clamping ring.

[0011] In typical embodiments, a minimum wall thickness of the clamping ring in the radial direction, in particular in a region between two of the radial elevations, is at most 30%, 40%, 50%, 60% or 70% of a maximum wall thickness of the clamping ring in the radial direction, in particular in the region of the radial elevations. In typical embodiments, a local maximum wall thickness of the clamping ring varies between each of the radial elevations by a maximum of 10%, in particular the local maximum wall thickness of the clamping ring is the same in each of the radial elevations. In typical embodiments, a local minimum wall thickness of the clamping ring in indentations or "valleys" between each of the radial elevations varies by a maximum of 10%, in particular the local minimum wall thickness of the clamping ring in indentations or "valleys" between each of the radial elevations.The indentations or "valleys" with their thinner walls are particularly advantageous for deformation of the clamping ring. The radial elevations are particularly advantageous for the buildup of clamping force.

[0012] In typical embodiments, an axial width of the clamping ring is not greater than 30%, 40%, 50%, 60% or 70% of an inner diameter of the clamping ring.

[0013] In typical embodiments, an inner side of the clamping ring has an at least partially circumferential contact surface on the inner diameter. The contact surface can have a width in the axial direction of at most 40%, 50%, 60% or 70% or at least 10%, 20% or 30% of the axial width of the clamping ring. In typical embodiments, the width of the contact surfaces in the axial direction is at least 10%, 20% and at most 30%, 40% of the inner diameter of the clamping ring. Typically, the contact surface is designed to bear against the plug-in sleeve. Typically, an edge break, for example as a chamfer or as a radius, is formed on the inside of the clamping ring. Typically, an edge break is formed laterally, in particular to the left and right, of the contact surface.In particular, the contact surface typically advantageously enables a concentration of the clamping force on a smaller area of ​​the socket and thus in particular strengthens the connection between the shaft and the socket.

[0014] In typical embodiments, the clamping ring comprises a radial clamping gap. Typically, at least one of the walls of the clamping gap substantially follows a radial axis. Typically, the radial clamping gap extends along an axis of the clamping gap, in particular along an axis of symmetry of the clamping gap. In typical embodiments, the axis of the clamping gap is a radial axis. In typical embodiments, a width of the clamping gap is substantially radially constant, in particular in a non-assembled state or without exerting a force on the clamping gap.

[0015] In typical embodiments, the radial clamping gap is arranged in the region of one of the radial elevations. In particular, the radial clamping gap is arranged in the region of the local maximum wall thickness of one of the radial elevations.

[0016] Typically, the clamping ring comprises exactly one clamping gap. In typical embodiments, the clamping gap is arranged in exactly one radial elevation.

[0017] Typically, at least one of the radial elevations, in particular a radial elevation with a clamping gap, has an outer contour surface parallel to the axis of the clamping gap. Such a surface parallel to the clamping gap can be used as an abutment for a clamping screw of the clamping ring.

[0018] In typical embodiments, the clamping ring comprises a receptacle for a clamping element, in particular precisely one receptacle for a clamping element. In particular, the clamping ring comprises a bore for receiving a clamping screw. A central axis of the bore is typically arranged radially closer to the outer diameter than to the inner diameter of the clamping ring. The outer diameter of the clamping ring is typically the diameter in the region of the maximum wall thickness of the clamping ring. Typically, the central axis of the bore is arranged substantially perpendicular to a radial axis of the clamping ring. In typical embodiments, the central axis of the bore is arranged substantially perpendicular to the straight edge of the radial elevation. Typically, the central axis of the bore is arranged substantially perpendicular to at least one of the walls of the clamping gap. In typical embodiments, the bore has a thread for receiving a clamping screw.

[0019] In embodiments, the clamping ring has a support element, for example a support pin, for supporting the clamping screw, in particular to enable the clamping ring to be widened or spread open with the clamping screw.

[0020] Typically, the clamping ring is made of sheet metal, particularly using a laser cutting process, a water jet cutting process, or a stamping process. In typical embodiments, the clamping ring can be manufactured in a single contour. Advantageously, the contour of the clamping ring typically eliminates the need for an additional balancing step, thus allowing for simple and cost-effective production.

[0021] In typical embodiments, the clamping ring is applied to the plug sleeve, in particular to connect the plug sleeve to the shaft. Typically, the plug sleeve comprises at least 4 plug sleeve bores through a lateral surface of the plug sleeve. In particular, the plug sleeve comprises 4, 6 or 8 plug sleeve bores, preferably 6 plug sleeve bores. Typically, the plug sleeve bores are through-bores. Typically, all plug sleeve bores have the same diameter. Typically, the plug sleeve is designed to accommodate a motor shaft and is connected to a drive pinion, in particular a planetary gear. Typically, the plug sleeve bores have a larger diameter than the width of the contact surfaces in the axial direction. In particular, the width of the contact surfaces in the axial direction is a maximum of 65% or 75% of the diameter of the plug sleeve bores.

[0022] In typical embodiments, the inner diameter of the clamping ring is larger than the outer diameter of the receptacle, especially in the unassembled state. Typically, the diameter of the clamping ring is reduced by tightening the clamping screw. In particular, the clamping gap is reduced.

[0023] In some embodiments, the inner diameter of the clamping ring in the unassembled state is smaller than the outer diameter of the plug-in sleeve. In particular, the clamping ring is preloaded by an oversize and can thus achieve a higher clamping force. Typically, the clamping ring can be expanded for assembly on the plug-in sleeve. In particular, the support element can support the clamping screw to expand the clamping ring.

[0024] In typical embodiments, the clamping ring is secured against twisting, removal, or loss relative to the plug-in sleeve, in particular with a securing element. Typically, the clamping ring is secured against axial or rotational displacement. The securing element can advantageously achieve a defined alignment of the clamping ring, in particular relative to an adapter plate of a gearbox, in order to, for example, ensure accessibility of the clamping screw. Typically, the securing element serves as a loss protection for the clamping ring when the gearbox is not mounted on the engine. Typically, the securing element comprises a gap engagement body and a plug-in sleeve engagement body, wherein the plug-in sleeve engagement body is connected to the gap engagement body, in particular connected in one piece.

[0025] Typically, the locking element's engaging body engages one of the locking element's bores, particularly in a form-fitting manner. Typically, the locking element's engaging body does not penetrate an inner surface of the locking element's sleeve. This advantageously does not restrict the motor shaft's insertion into the locking element.

[0026] In typical embodiments, the securing element engages in the clamping gap of the clamping ring. In typical embodiments, the gap engagement body of the securing element has a through-hole, in particular for the passage of the clamping ring's clamping screw. The clamping screw of the clamping ring can advantageously secure the securing element in the clamping gap against removal or loss. In embodiments, the gap engagement body of the securing element has a recess, in particular open around the circumference, for the clamping screw of the clamping ring. The open recess allows the securing element to be attached or removed independently of the clamping screw.

[0027] In some embodiments, the clamping ring has a radial clamping ring bore. Typically, the securing element, for example a pin or a screw, is inserted into the radial clamping ring bore. Typically, the radial clamping ring bore has a countersink or stop surface radially on the outside, in particular to ensure a defined penetration depth of the securing element. The securing element engages in one of the plug-in sleeve bores without penetrating the inner surface. In some embodiments, the securing element is positively connected to one of the plug-in sleeve bores. In some embodiments, the securing element has a smaller diameter than the plug-in sleeve bores, which leaves some play.

[0028] Typically, the securing element is made of a plastic, in particular a recycled or sustainable, for example compostable, plastic, or of sheet metal.

[0029] The invention enables a connection that, compared to the prior art, achieves a compact clamping with a high clamping force. For example, the combination of the radial elevations and the thin-walled indentations (or "valleys") allows the necessary clamping force to clamp a motor shaft with a diameter of 19 mm to be achieved with an M4 or M5 screw instead of an M6 screw. In particular, the invention allows for low mass inertia and good balancing quality at low manufacturing costs. The locking element ensures effective anti-twisting and loss protection for the clamping ring during transport, handling, and operation.

[0030] Some designs can offer particular advantages when clamping the motor shaft in a planetary gear. The very small axial width of the clamping ring, the small space requirement of the connection, and the high clamping force are particularly advantageous in very compact planetary gears with limited installation space. Short description of the drawings

[0031] The invention is explained in more detail below with reference to the accompanying drawings, in which the figures show: Fig. 1a a clamping ring according to the invention; Fig. 1b the clamping ring of the Fig. 1a in a cross section; Fig. 2a a plug-in sleeve of a connection according to the invention; Fig. 2b the socket of the Fig. 2a in a cross section; Fig. 3a a clamping ring, a plug-in sleeve and a securing element of a connection according to the invention; Fig. 3b the clamping ring, the plug-in sleeve and the locking element of the Fig. 3a; Fig. 4a a securing element of a connection according to the invention; Fig. 4b a securing element of a connection according to the invention; Fig. 4c a securing element of a connection according to the invention; Fig. 4d a securing element of a connection according to the invention; Fig. 5a an alternative embodiment of a clamping ring according to the invention; and Fig. 5b the clamping ring of the Fig. 5a, a plug-in sleeve and an alternative securing element of a connection according to the invention. Description of embodiments

[0032] Typical embodiments are described below with reference to the figures, whereby the invention is not limited to the embodiments. Rather, the scope of the invention is determined by the claims. When describing the embodiments, the same reference numerals may be used for the same or similar parts in different figures and for different embodiments in order to make the description clearer. However, this does not mean that corresponding parts of the invention are limited to the variants shown in the embodiments. In some cases, features that have already been described in connection with other figures are not described again for the sake of clarity. In some cases, features that are shown more than once in a figure are only identified by reference numerals.

[0033] Fig. 1a shows a clamping ring 100 according to the invention. The clamping ring 100 comprises three radial elevations 1a, 1b, and 1c, wherein one of the radial elevations 1a comprises a radial clamping gap 5. The radial clamping gap 5 divides one of the radial elevations 1a, in particular at the substantially greatest wall thickness of the radial elevation 1a. Perpendicular to the clamping gap 5, the clamping ring 100 has a receptacle 3 for a clamping screw. The receptacle 3 comprises an internal thread 14 for connecting the clamping screw to the clamping ring 100. A portion of the receptacle 3 comprises a through-bore. The clamping ring 7 comprises a radially inwardly located inner surface 7.

[0034] Fig. 1b shows the clamping ring of the Fig. 1a in a cross-section. The clamping gap 5 encompasses an axis 15 of the clamping gap. The axis 15 of the clamping gap 5 is a radial axis. The radial elevation 1a, which encompasses the clamping gap 5, comprises a surface 11 parallel to the axis 15 of the clamping gap 5. The surface 11 is perpendicular to the axis 13 of the receptacle 3 for the clamping screw.

[0035] Fig. Figure 2a shows a plug-in sleeve 200 of a connection according to the invention. The plug-in sleeve 200 comprises six plug-in sleeve bores 203 in a lateral surface 201 of the plug-in sleeve 200. The plug-in sleeve bores 203 are arranged rotationally symmetrically, in particular with sixfold rotational symmetrical arrangement, around an axis of the plug-in sleeve 200. Fig. 2b shows the socket 200 of the Fig. 2b in a cross section.

[0036] Fig. 3a shows a connection with the clamping ring 100 of the Fig. 1a and Fig. 1b and the socket 200 of the Fig. 2a and Fig. 2b. The inner side 7 of the clamping ring 100 lies with the contact surface 57 facing the outer surface of the plug-in sleeve 200. A clamping screw 33 is inserted into the receptacle 3. A flat underside of the screw head of the clamping screw 33 rests on the surface 11 of the outer contour of the clamping ring 100. A securing element 30 is inserted into the radial clamping gap 5. One end of the securing element 30 engages in one of the plug-in sleeve bores 203 without penetrating a radially inner outer surface of the plug-in sleeve 200. The clamping screw 33 engages in the securing element 30. The clamping screw 33 prevents the securing element 30 from being removed or falling out. Fig. 3b is the connection of the Fig. 3a in a top view. The contact surface 57 of the clamping ring 100 rests against the outer surface of the plug-in sleeve 200. A chamfered edge 58 is formed on the side of the contact surface. An axis of the securing element 30 is perpendicular to the axis 13 of the receptacle of the clamping screw 33.

[0037] In the Fig. 4a-4d show various embodiments of the securing element 30. In the Fig. 4a, the securing element 30a comprises a gap engagement body 41a, which essentially follows the clamping gap and has a through hole 43a, and a socket engagement body 42a. The socket engagement body 42a follows the shape of the socket bores. In particular, the socket engagement body 42a is essentially circular. The socket engagement body 42a has a step in the radial direction and an outer radius. The outer radius of the socket engagement body 42a essentially corresponds to a radius of the socket bores. In embodiments, the outer radius of the socket engagement body can be smaller than a radius of the socket bores.

[0038] In the Fig. 4b, a securing element 30b comprises the gap engagement body 41a of the securing element 30a of the Fig. 4a. The securing element 30b comprises a female engagement body 42b, which is flush with the gap engagement body 41a. The female engagement body 42b has a length along one axis that essentially corresponds to a diameter of the female bores. The length of the female engagement body 42b is smaller than a length of the gap engagement body 41a with respect to the same axis. The securing elements 30a and 30b are axially symmetrical with respect to an axis through the centers of the female engagement body and the through hole 43a.

[0039] In the Fig. 4c, a securing element 30c comprises a gap engagement body 41c having two open recesses. The recesses are open to one side of the gap engagement body 41c. The contour of the gap engagement body 41c roughly follows the shape of the lowercase Greek letter epsilon (ε). The contour of the gap engagement body 41c enables insertion and removal of the securing element 30c independently of the clamping screw, in particular by lateral insertion along an axial axis of the clamping ring.

[0040] In the Fig. 4d, a securing element 30d comprises a gap engagement body 41d. The gap engagement body 41d is essentially U-shaped, with two legs capable of engaging one of the receptacle bores. The contour of the gap engagement body 41d enables insertion and removal of the securing element 30d independently of the clamping screw, in particular by sliding it along a radial axis of the clamping ring.

[0041] The Fig. Figure 5a shows an alternative embodiment of a clamping ring 100. The clamping ring 100 comprises a circumferential contact surface 57 on the inner side 7 of the clamping ring 100. Edge breaks (58, 59) in the form of chamfers are formed on the inner side 7 of the clamping ring 100. The edge breaks adjoin the contact surface 57 on the left (58) and right (59). The contact surface thus has a width of approximately 50% of the axial width of the clamping ring. This leads to a higher surface pressure on the contact surface and concentrates the clamping force on the area of ​​the bores in the plug-in sleeve. The embodiments of the Fig. 1a, Fig. 1b, Fig. 3a and Fig. 3b can also be on the inside 7 a, as in the Fig. 5a shown, circumferential contact surface 57. The clamping ring 100 of the Fig. 5a comprises three clamping ring bores 53, each clamping ring bore comprising an axis 54 of the clamping ring bore 53. The axis 54 of the clamping ring bore 53 is a radial axis. In the Fig. 5a, each radial elevation 1a, 1b, 1c comprises a clamping ring bore 53. In other embodiments not shown, only one of the radial elevations 1a, 1b, 1c comprises a clamping ring bore 53.

[0042] In the Fig. 5b is a connection of a clamping ring 100 of the Fig. 5a and the socket 200 of the Fig. 2a and Fig. 2b. A securing element 30 is inserted into one of the clamping ring bores 53, which engages in one of the plug-in sleeve bores 203. In embodiments not shown, when the clamping ring 100 is connected, the Fig. 5a and the socket 200 of the Fig. 2a and Fig. 2b securing of the clamping ring 100 by the securing element 30 in one of the clamping ring bores 53 is ensured. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] EP 3 642 501 B1

[0003]

Claims

[1] Clamping ring (100), in particular for clamping a plug-in sleeve (200) on a shaft, comprising: - a holder (3) for a clamping screw (33), - a radial clamping gap (5), and - at least two and / or a maximum of four radial elevations (1a-c), wherein the receptacle (3) for the clamping screw (33) and the clamping gap (5) are arranged in one of the radial elevations (1a). [2] Clamping ring (100) according to claim 1, wherein a minimum wall thickness of the clamping ring (100) in the radial direction is at most 50% of a maximum wall thickness of the clamping ring (100) in the radial direction. [3] Clamping ring (100) according to one of the preceding claims, wherein an axis (13) of the receptacle (3) of the clamping screw (33) is arranged closer to an outer diameter of the clamping ring (100) than to an inner diameter of the clamping ring (100). [4] Clamping ring (100) according to one of the preceding claims, wherein an axial width of the clamping ring (100) is not greater than 50% of the inner diameter of the clamping ring (100). [5] Clamping ring (100) according to one of the preceding claims, wherein an inner side (7) of the clamping ring (100) has at the inner diameter an at least partially circumferential contact surface (57) with a width in the axial direction of at most 50% of the axial width of the clamping ring (100). [6] Clamping ring (100) according to one of the preceding claims, wherein not all or none of the radial elevations (1a-c) are symmetrical with respect to a radial axis. [7] Clamping ring (100) according to one of the preceding claims, wherein at least one of the radial elevations (1a) has a surface (11) of the outer contour parallel to an axis (15) of the clamping gap (5). [8] Clamping ring (100) according to one of the preceding claims, wherein the clamping ring (100) is made of sheet metal. [9] Connection comprising a shaft, a plug-in sleeve (200), and a clamping ring (100) according to one of the preceding claims, wherein the clamping ring (100) is applied to the plug-in sleeve (200). [10] Connection according to claim 9, wherein the plug-in sleeve (200) comprises at least 4 plug-in sleeve bores (203) through a lateral surface (201) of the plug-in sleeve (200). [11] Connection according to one of claims 9-10, wherein the connection comprises a securing element (30, 30a-d) for securing the clamping ring (100) against rotation and / or removal relative to the plug-in sleeve (200); and the securing element (30, 30a-d) engages in one of the plug-in sleeve bores (203). [12] Connection according to claim 11, wherein the securing element (30, 30a-d) engages in the clamping gap (5) of the clamping ring (100). [13] A compound according to claim 11, wherein the clamping ring (100) comprises a radial clamping ring bore (53); and the securing element (30, 30a-d) is inserted into the clamping ring bore (53). [14] Connection according to one of claims 8-12, wherein the inner diameter of the clamping ring (100) in a non-assembled state is smaller than an outer diameter of the plug-in sleeve (200). [15] Use of a clamping ring (100) according to one of claims 1-8 for clamping a plug-in sleeve (200) on a shaft.

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