Gearbox with a first housing part and a second housing part

Abstract

Gearbox with a first housing part (3) and a second housing part (5), wherein the first and second housing parts (3, 5) are connected at least frictionally by means of a clamping ring (2), characterized in that a clamping screw (4) is screwed with its threaded section into an axially directed threaded bore of a clamping flange (1), so that the clamping flange (1) is pulled axially towards the first housing part (3) and thus presses on the clamping ring (2), wherein a screw head of the clamping screw (4) rests on the side of a bearing flange (8) facing away from the first housing part (3), wherein the clamping screw (4) is guided through a bore extending axially through the bearing flange (8) and through the first housing part (3).

Description

[0001] The invention relates to a gearbox with a first housing part and a second housing part.

[0002] It is generally known that a gearbox has a housing.

[0003] The invention is therefore based on the objective of further developing a gearbox with a first housing part and a second housing part.

[0004] According to the invention, the problem is solved in the gearbox with a first housing part and a second housing part according to the features specified in claim 1.

[0005] Important features of the invention in the gearbox with a first housing part and a second housing part are that a first and a second housing part are connected at least frictionally by means of a clamping ring.

[0006] The advantage here is that a non-destructive, reusable connection is created, allowing for the simple assembly of a multi-stage gearbox. The first gearbox stage can be arranged in the first housing part, and the second gearbox stage in the second housing part. The positive-locking connection is easily achieved by widening the clamping ring.

[0007] In an advantageous embodiment, the clamping ring has a radially and / or axially through slot at a circumferential position. The advantage here is that simple expansion is possible.

[0008] In an advantageous embodiment, the clamping ring has a conical surface with which it bears flat against the first housing part. An advantage of this design is that the clamping ring and the corresponding contact surface on the first housing part can be manufactured simply. The cone angle of the conical surface can be selected to achieve the lowest possible friction.

[0009] In an advantageous embodiment, a clamping screw is screwed with its threaded section into an axially directed threaded bore of a clamping flange, so that the clamping flange is pulled axially towards the first housing part and thus presses on the clamping ring, In particular, this ensures that the clamping ring is pre-tensioned and expands, pressing against the second housing part on its radial outer circumference to create the positive connection. An advantage of this design is that the clamping flange can be easily axially pressed using the clamping screw. This allows the clamping ring to be pressed with its conical surface onto the corresponding conical surface formed on the first housing part, thus expanding it radially and enabling the positive connection to the second housing part to be easily established.

[0010] In an advantageous embodiment, the clamping ring is cylindrically shaped on its outer circumference. The advantage here is that the expansion causes radial pressure, resulting in a large contact area between the clamping ring and the first housing part.

[0011] In an advantageous embodiment, the screw head of the clamping screw rests on the side of a bearing flange facing away from the first housing part. The clamping screw is guided through a bore that extends axially through the bearing flange and the first housing part. An advantage of this design is that axial clamping can be carried out easily.

[0012] In an advantageous embodiment, the first housing part is arranged axially between the clamping flange and the bearing flange. An advantage of this design is that the clamping flange can be pulled towards the bearing flange by means of the clamping screw, whereby the clamping flange presses on the clamping ring, which in turn presses on the first housing part, which is supported on the bearing flange. This causes the clamping ring, also arranged between the clamping flange and the bearing flange, to expand radially on the conical bearing surface formed on the first housing part, so that it presses against a receiving surface on the second housing part, thus creating a force-fit connection. A small gap, or in particular a gap, is therefore present between the clamping flange and the first housing part.

[0013] In an advantageous embodiment, the radial wall thickness of the clamping ring decreases towards the first housing part. An advantage of this is that a simple design as a conical surface is possible.

[0014] In an advantageous embodiment, the radial wall thickness of the clamping ring decreases towards the clamping flange, particularly when the clamping flange has a corresponding conical surface for the clamping ring to bear against the clamping flange in a flat contact position. An advantage of this is that the conical surface can be manufactured simply.

[0015] In an advantageous embodiment, the radial wall thickness has a maximum that is either located at an axial edge of the clamping ring or spaced apart from both axial edges of the clamping ring. It is advantageous that a conical surface can be formed on both sides of the clamping ring, in particular a first conical surface and a second conical surface axially spaced or adjacent to it.

[0016] In a preferred embodiment, a bearing for the rotor shaft of an electric motor driving the gearbox is accommodated in the bearing flange. The advantage here is that a geared motor with a multi-stage gearbox can be manufactured in a simple manner.

[0017] In an advantageous embodiment, the first housing part is designed as a ring gear of a first planetary gear stage of the transmission. The advantage here is that a multi-stage transmission can be easily manufactured by arranging a first stage in the first housing part and connecting a further housing part to this first housing part. This second housing part can be either an output-side flange or a second housing part that includes a further gear stage.

[0018] In an advantageous embodiment, the second housing part is designed as a ring gear of a second planetary gear stage of the transmission. The advantage here is that a second stage can be easily connected to the first stage by simply inserting the two housing parts into one another and then creating a frictional connection.

[0019] In an advantageous embodiment, an annular groove is formed on the second housing part, wherein the axial area covered by the annular groove encompasses the axial area covered by the clamping ring. An advantage of this is that, in addition to the frictional connection, a positive locking connection in the axial direction can be easily achieved.

[0020] In an advantageous embodiment, the clamping ring is pre-tensioned and / or expanded such that it projects at least partially into the ring groove. The advantage here is that a positive fit can be easily achieved.

[0021] In an advantageous embodiment, the teeth of the first housing part, designed as a ring gear, mesh with the teeth of a planetary gear, which also meshes with the teeth of a sun gear, which is non-rotatably connected to the rotor shaft of the electric motor driving the gearbox. wherein the planetary gear is rotatably mounted on a planetary gear axle which is pressed into a planetary gear carrier. An advantage of this is that the invention can be easily applied to a multi-stage planetary gear system.

[0022] In an advantageous embodiment, a further sun gear is non-rotatably connected to the planetary gear carrier, where the teeth of another planetary gear are engaged with the teeth of the sun gear, the toothing of the further planetary gear is also in engagement with the toothing of the second housing part, which is designed as a ring gear, wherein the further planet gear is rotatably mounted on a planet gear shaft which is pressed into a planet gear carrier that functions as the output shaft of the transmission. An advantage of this is that the invention can be easily applied to a multi-stage planetary transmission.

[0023] In an advantageous embodiment, the clamping ring is grooved, knurled, and / or toothed on its radial outer circumference facing the second housing part. This is advantageous because it further improves the connection, in particular by providing anti-rotation protection.

[0024] Further advantages arise from the dependent claims. The invention is not limited to the combination of features of the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent, in particular from the problem statement and / or the problem arising from a comparison with the prior art.

[0025] The invention will now be explained in more detail with the help of illustrations: In the Fig. Figure 1 shows a section of a first geared motor according to the invention, wherein a clamping ring is provided for the force-fit connection of two housing parts (3, 5). In the Fig. 2 is an area of Fig. 1 shown enlarged. In the Fig. Figure 3 shows the clamping ring 2 in oblique view. In the Fig. 4 is a in Fig. 1 alternatively usable clamping ring 2 shown in oblique view. In the Fig. Figure 5 shows a section of another geared motor according to the invention, in which a differently shaped clamping ring 2 is used. In Fig. 6 is a Fig. 5 associated clamping ring 2 shown, which has two inclined surfaces. In Fig. Figure 7 shows a section of another geared motor according to the invention, in which the clamping ring 2 is shown before insertion into an annular groove 70 provided on the second housing part 5. In Fig. 8 is in contrast to the Fig. 7 the clamping ring 2 is inserted axially so far that it can protrude at least partially into the ring groove.

[0026] As in Fig. 1 together with Fig. 2 and Fig. 3 shows a clamping ring 2 when joining housing parts ( 3 , 4 ) used.

[0027] The geared motor has an electric motor, with whose motor housing 9 a bearing flange 8 is firmly connected, in particular bolted. In the bearing flange 8 is a warehouse 10 a bearing which rotatably mounts the rotor shaft of the electric motor relative to the bearing flange 8 .

[0028] The rotor shaft is non-rotatably connected to a sun gear. 15 , which acts as the driving gear part of the transmission.

[0029] The gearbox is designed as a planetary gearbox, as an example.

[0030] The toothing of the sun gear 15 is engaged with the teeth of a planetary gear 11 , which is mounted on a planetary gear shaft by means of a bearing, in particular a needle bearing 12 is mounted on a rotatable bearing.

[0031] The gearing of the planetary gear 7It is also engaged with the teeth of a ring gear, which is the first housing part. 3 is trained.

[0032] The planetary gear axis 12 is pressed into a planetary gear carrier 13 , in particular in one on a planetary gear carrier 13 well-developed cheek.

[0033] The planetary gear carrier 13 is thus designed as the output shaft of the first planetary gear stage and is rotationally fixed to a sun gear 14 a second planetary gear stage. Preferably the sun gear 14 into the planetary gear carrier 13 pressed in.

[0034] The toothing of the sun gear 14 is engaged with the teeth of a planetary gear 7 , which is rotatably mounted on a planetary gear axle via bearings, in particular needle bearings, which is in the planetary gear carrier 16 , which represents the driving shaft, is pressed in and connected.

[0035] Furthermore, the toothing of the planetary gear 7 in engagement with the toothing of another ring gear, which serves as the second housing part 5 is trained.

[0036] The first housing part 3 is with the second housing part 5 positively connected by means of a clamping ring 2 has an inclined surface, i.e., a slope, i.e., a conical surface, which corresponds to a conical surface of the first housing part. 3 is pending.

[0037] By means of an axially directed clamping screw 4 will the tension ring 2 axial to the first housing part 3 pressed down. The tension screw is for this purpose. 4 with its threaded area into a clamping flange 1 The screw is inserted into the axially oriented threaded hole. The screw head of the clamping screw is located at the axially opposite end region. 4 presses thus the bearing flange 8 on its first housing part 3 side facing away from the first housing part 3 there. But since the first housing part 3 and the bearing flange 8 when they lie against each other, the clamping ring 2 from the one on him on his from the first housing part 3 clamping flange on the opposite side 1 axially pressed and thus on the first housing part 3 The shaped conical surface is radially widened so that the clamping ring can be placed on the second housing part. 5 presses.

[0038] For this, it is important that the clamping ring 2 covered axial area with that of the second housing part 5 The covered axial area overlaps. The clamping ring 2 It therefore lies along its entire radial circumference on the second housing part. 5 which has a cylindrical receiving surface in this area.

[0039] The one from the first housing part 3 The covered axial area overlaps with that of the second housing part. 5 covered area. Thus, the clamping ring 2 radially between the two housing parts ( 3 , 5 ) can be arranged. By axially pressing the clamping ring. 2 onto the conical surface of the first housing part 3 A radial expansion of the clamping ring will occur. 2 This causes a positive connection between the first and second housing parts ( 3 , 5 ) using the clamping ring 2 .

[0040] The tensioning screw 4 is at a smaller radial distance to the axis of rotation of the driving shaft, and therefore also to the axis of rotation of the sun gear 15 , arranged as the clamping ring 2 , in particular also as the inner surface of the clamping ring 2 .

[0041] The clamping flange 1The covered radial spacing area overlaps on one side with that of the clamping ring. 2 covered radial spacing area and, on the other hand, with that of the clamping screw 4 covered radial spacing range.

[0042] The first housing part 3 is in the second housing part 5 The shaped receiving opening is inserted. An axial limit is provided by a feature on the first housing part. 3 trained level.

[0043] The second housing part 5 It is not only the ring gear of the second gear stage but also covers the axial area that is covered by the second gear stage. Likewise, the first housing part... 3 not only designed as a ring gear but also covers the axial area which is covered by the first gear stage.

[0044] As in Fig. 2 and Fig. As shown in 3, the ring axis of the clamping ring is 2aligned in the axial direction.

[0045] The radial wall thickness of the ring decreases in the axial direction, i.e., from the second housing part. 5 to the engine, especially to the bearing flange 8 of the engine, since the inner surface of the clamping ring 2 The surface is a cone and the outer surface is circularly cylindrical, i.e., with a constant radius.

[0046] The tension ring 2 It has a radially and axially continuous slot at a circumferential position, making widening particularly easy.

[0047] The planetary gear carrier 16 is in a second housing part 5 The bearings are rotatably mounted and function as the output shaft of the gearbox.

[0048] As in Fig. As shown in Figure 4, there is also a knurling, knurling, or toothing on the outer circumference of the clamping ring. 2predictable, so that an improved connection with the second housing part 5 is achievable.

[0049] As in Fig. 6 and Fig. 5 shown, but alternatively another clamping ring is also available. 2 usable, which has a conical surface on both axial sides. The radially outer surface is also as in Fig. 3. Designed as a cylindrical surface. However, the radial wall thickness initially increases in the axial direction, particularly proportionally to the axial distance to the axial edge, and then decreases again, particularly also proportionally to the axial distance to the other axial edge of the clamping ring. 2 .

[0050] Thus, a first conical surface is formed on the clamping ring 2 executed, which leads to the clamping flange 1 is provided facing towards, and a second conical surface on the clamping ring 2 executed, which leads to the first housing part 3 is intended to be.

[0051] The apex of the first conical surface points in the opposite direction to the apex of the second conical surface. Thus, the radial wall thickness increases in the axial direction until a maximum value is reached, and then decreases again.

[0052] At the clamping flange 1 A conical surface corresponding to the first conical surface is formed, so that the clamping ring 2 with its first conical surface flat against the clamping flange 1 is attached. Likewise, the first housing part is also attached. 3 a conical surface corresponding to the second conical surface is formed, so that the clamping ring 2 flat on the first housing part 3 is pending.

[0053] Thus, when tightening the clamping screw 4 again, a widening of the clamping ring 2 to create the force-fit connection with the second housing part 5This results in less friction and easier expansion due to the axial arrangement of conical surfaces on both sides.

[0054] As in Fig. 7 and Fig. As shown in section 8, there is also an additional feature on the second housing part. 5 a ring groove can be made into which the clamping ring 2 It is pressed in during expansion. For this purpose, the clamping ring is used. 2 The covered axial area comprises the axial area covered by the annular groove, as shown in Fig. 8 shown. Fig. Figure 7 shows the state during the insertion of the first housing part. 3 into the second housing part 5 , wherein the clamping ring 2 The axial area is not yet completely covered by the ring groove. 70 The covered axial area is included.

[0055] The clamping ring is located here according to Fig. 3 executed.

[0056] In further embodiments according to the invention, the clamping ring 2 the execution of the Fig. 7 and Fig. 8 but also as a clamping ring 2 after Fig. 4 or after Fig. 6 executable.

[0057] Through the ring groove 70 In addition to the positive locking connection achieved in the axial direction, a positive locking connection can also be achieved.

[0058] Between the first and second housing parts ( 3 , 5 A seal, in particular a flat gasket or O-ring, is provided. The seal is positioned at a larger radial distance than the annular groove. 70 .

[0059] In other embodiments, only the first or second conical surface is attached to the clamping ring. 2 formed. Accordingly, the clamping flange then either has a conical surface or it does not. Reference symbol list 1 clamping flange 2 clamping rings 3 first housing part, in particular ring gear 4 screws 5 second housing part, in particular ring gear 6 planetary gear axle 7 planetary gear 8 bearing flange 9 Motor housing, in particular stator housing 10 warehouses 11 planetary gear 12 planetary wheel axle 13 planetary gear carriers 14 Sun wheel 15 sun wheel 16 planetary gear carriers 70 Ring groove

Claims

[1] Gearbox with a first housing part and a second housing part, characterized by , that The first and second housing parts are connected at least by means of a clamping ring in a force-fit manner. [2] Gearbox according to claim 1, characterized by that the clamping ring has a radially and / or axially continuous slot at a circumferential position. [3] Gearbox according to at least one of the preceding claims, characterized by that the clamping ring has a conical surface with which the clamping ring rests flat against the first housing part. [4] Gearbox according to at least one of the preceding claims, characterized by , that a clamping screw is screwed with its threaded section into an axially directed threaded bore of a clamping flange, so that the clamping flange is pulled axially towards the first housing part and thus presses on the clamping ring, in particular so that it is expanded, pre-tensioned and presses on the second housing part at its radial outer circumference to create the force-fit connection. [5] Gearbox according to at least one of the preceding claims, characterized by that the clamping ring is cylindrically shaped on its outer circumference. [6] Gearbox according to at least one of the preceding claims, characterized by , that a screw head of the clamping screw rests on the side of a bearing flange facing away from the first housing part, wherein the clamping screw is guided through a bore that passes axially through the bearing flange and through the first housing part. [7] Gearbox according to at least one of the preceding claims, characterized by that the first housing part is arranged axially between the clamping flange and the bearing flange. [8] Gearbox according to at least one of the preceding claims, characterized by , that the radial wall thickness of the clamping ring decreases towards the first housing part and / or the radial wall thickness of the clamping ring decreases towards the clamping flange, in particular wherein the clamping flange has a corresponding conical surface for the clamping ring to bear against the clamping flange in a flat contact area. [9] Gearbox according to at least one of the preceding claims, characterized by , that the radial wall thickness has a maximum that is either located at an axial edge of the clamping ring or is spaced apart from the two axial edges of the clamping ring. [10] Gearbox according to at least one of the preceding claims, characterized by , that a bearing of a rotor shaft of an electric motor driving the gearbox is accommodated in the bearing flange. [11] Gearbox according to at least one of the preceding claims, characterized by , that the first housing part is designed as a ring gear of a first planetary gear stage of the transmission and / or that the second housing part is designed as a ring gear of a second planetary gear stage of the transmission. [12] Gearbox according to at least one of the preceding claims, characterized by , that A ring groove is formed on the second housing part. wherein the axial area covered by the ring groove includes the axial area covered by the clamping ring. [13] Gearbox according to at least one of the preceding claims, characterized by that the clamping ring is pre-tensioned and / or expanded in such a way that the clamping ring protrudes at least partially into the ring groove. [14] Gearbox according to at least one of the preceding claims, characterized by , that The teeth of the first housing part, designed as a ring gear, engage with the teeth of a planetary gear, which also engages with the teeth of a sun gear, which is non-rotatably connected to the rotor shaft of the electric motor driving the gearbox. wherein the planetary gear is rotatably mounted on a planetary gear axle which is pressed into a planetary gear carrier, and / or that another sun gear is non-rotatably connected to the planetary gear carrier, where the teeth of another planetary gear are engaged with the teeth of the sun gear, the toothing of the further planetary gear is also in engagement with the toothing of the second housing part, which is designed as a ring gear, wherein the further planet gear is rotatably mounted on a planet gear axle which is pressed into a planet gear carrier which acts as the output shaft of the gearbox. [15] Gearbox according to at least one of the preceding claims, characterized by that the clamping ring is grooved, knurled and / or toothed on its radial outer circumference facing the second housing part.

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