Roller flange, external rotor motor and conveyor roller

Abstract

A roller flange (100) for mounting on an end face of a cylindrical or roll-shaped roller (200) comprises a substantially annular plastic body (110), a bearing (120), and a metallic ring (130) surrounding the bearing (120). The ring (130) and the bearing (120) are at least partially embedded in the plastic body (110). The ring (130) has force-transmitting elements positioned distributed on or across a surface of the plastic body (110). The force-transmitting elements comprise at least one locking means (150a, 150b) for transmitting an axial force between the roller (200) and the roller flange (100), and at least one pin (160a, 160b, 160c, 160d) for transmitting a radial force between the roller (200) and the roller flange (100).

Description

[0001] The invention relates to a roller flange, an external rotor motor with such a roller flange and a conveyor roller with such a roller flange.

[0002] A roller flange is known per se and is mounted, for example, on the end face of cylindrical or roller-shaped rollers. These rollers are, for example, rotor rollers of external rotor motors or rollers of driven or non-driven conveyor rollers.

[0003] Such conveyor rollers are well known and are frequently used in a wide variety of conveyor systems, for example, in a warehouse, a production facility, or even in a distribution system. Such conveyor systems are used to convey and sort loads. In conveyor systems with conveyor rollers of this type (roller conveyors), the material is transported by individual conveyor rollers that are temporarily in contact with the material. In addition to electrically driven, motorized conveyor rollers, a conveyor system can also have idle, non-driven conveyor rollers or conveyor rollers that are driven by a motorized conveyor roller via a belt.

[0004] Rollers of this type generally consist of a tubular shell and two roller bases mounted at both ends of this tubular roller shell, in which the roller axis is mounted either rigidly or rotatably by means of roller bearings. The key here is to ensure that the roller bases are securely seated in the roller shell, preventing both axial inward or outward displacement and rotational movement between the roller shell and the roller base.

[0005] However, achieving this permanent, tight fit of the roller bases in the roller shell is difficult. In conventional implementations, when the roller shell and roller bases are made of different materials, for example, the roller shell is made of metal and the roller bases are made of plastic, the connection between the two quickly loosens due to different thermal expansion of the different materials.

[0006] Particularly with heavily loaded rollers in conventional designs, the resulting flexion between the roller shell and the roller bases loosens the connection between the two, resulting in relative rotation between the roller bases and the roller shell. Once this occurs, this rotation becomes increasingly severe during continuous operation. A metallic roller base, on the other hand, is massive and increases the inertia of the roller.

[0007] One task to be solved is to provide an improved connection concept for conveyor rollers that eliminates these disadvantages and problems of the known rollers.

[0008] This object is achieved by the features of the independent claims. Advantageous embodiments with expedient and non-trivial refinements of the invention are specified in the respective subclaims.

[0009] The improved connection concept makes it possible, for example, to create a roller in which the roller bases in the roller shell are absolutely and permanently anchored in a manufacturing-simple manner against both axial displacement and relative rotation, even when high loads and temperature fluctuations occur, whereby the dimensional tolerances can also remain at an economically acceptable level.

[0010] In one embodiment according to the improved connection concept, the roller flange is designed for mounting on an end face of a cylindrical or roller-shaped roller, wherein the roller flange comprises a substantially annular plastic body, a bearing, and a metallic ring surrounding the bearing. The ring and the bearing are at least partially embedded in the plastic body. The ring has force transmission elements that are distributed on or positioned on a surface, for example on the circumferential surface, of the plastic body. The force transmission elements comprise one or more locking means for transmitting an axial force between the roller and the roller flange, for example for axially locking the first roller to the roller flange, as well as one or more pins for transmitting a radial force between the first roller and the roller flange or vice versa, such as a torque.

[0011] The use of metallic elements for power transmission improves the durability and resistance of the roller flange to both axial displacement and relative rotation. By embedding a comparatively lightweight metal ring into the plastic body of the roller flange, the mass and inertia of the roller flange are only slightly increased.

[0012] In various designs, the at least one pin of the roller flange is configured to form a positive connection with at least one corresponding recess in the roller. This allows for a stable transmission of force or torque.

[0013] For example, the ring, the bearing and the plastic body are arranged coaxially to the rotation axis of the first roller.

[0014] In various designs, the ring is slipped onto the bearing. This allows for easy assembly. This can be further supported by the ring having at least one elastic attachment element, such as a pin, that is in contact with the bearing. The elastic attachment element serves, for example, to facilitate the assembly of the ring onto the bearing.

[0015] In various designs, the roller flange comprises at least one pin-like fixing element for fixing another roller and a shoulder to prevent axial displacement of the other roller.

[0016] In some designs, the roller flange includes a torque transmitter, such as a pulley or gear, designed to transmit torque.

[0017] According to the improved connection concept, a roller flange according to one of the described designs can be used in an external rotor motor and / or in a conveyor roller.

[0018] In one embodiment of an external rotor motor with a roller flange according to the improved connection concept, the external rotor motor comprises the roller, which is designed, for example, as a rotor or external rotor of the external rotor motor. The roller flange is mounted on one end face of the roller of the external rotor motor. The roller is electrically driven, in particular by the external rotor motor. The at least one pin of the roller flange transmits torque from the roller to the roller flange.

[0019] In one embodiment of a non-electric conveyor roller with a roller flange according to the improved connection concept in a design with a torque transmitter, the conveyor roller comprises a roller. The roller flange is mounted on one end face of the roller. The roller flange is configured to be driven by an external drive, such as an external rotor motor, via the torque transmitter, for example, via a belt or gear attached to the torque transmitter. The at least one pin of the roller flange transmits torque from the roller flange to the roller.

[0020] In one embodiment of an electric conveyor roller with a roller flange according to the improved connection concept, the conveyor roller comprises an external rotor motor, a first roller, which is designed approximately as a rotor or external rotor of the external rotor motor, and a second roller, which is arranged concentrically to the first roller. The roller flange is mounted on an end face of the first roller of the external rotor motor. Furthermore, the first roller is driven by the external rotor motor. The at least one pin of the roller flange transmits a torque from the first roller to the roller flange. The roller flange transmits the torque of the first roller to the second roller.

[0021] In a further development of such an electric conveyor roller, the roller flange comprises at least one pin-like fixing element for fixing the second roller and a shoulder for preventing axial displacement of the second roller.

[0022] In an alternative or additional development of such an electric conveyor roller, the roller flange comprises a torque transmitter as explained above, such as a pulley or a gearwheel, which is configured to transmit torque. The conveyor roller is configured to transmit torque, such as a belt or a gearwheel attached to the torque transmitter, to at least one or more non-electric conveyor rollers of a roller conveyor by means of the torque transmitter on the roller flange.

[0023] This makes it possible, for example, to create a roller conveyor with several electric and non-electric conveyor rollers.

[0024] The improved connection concept is explained in more detail below using exemplary embodiments with reference to the drawings. Similar elements or elements with the same functions are designated by the same reference numerals. Therefore, a repeated explanation of individual elements is omitted where appropriate. The exemplary embodiments serve to explain and not to define the improved connection concept.

[0025] It shows, partly simplified: Fig. 1 is a sectional view of an embodiment of a roller flange mounted on an end face of a roller; Fig. 2a an embodiment of a roller flange; Fig. 2b an embodiment of a non-overmolded roller flange; Fig. 2c an embodiment of a metallic ring of the roller flange; Fig. 3 an exploded view of a roller with roller flange; Fig. 4 an exploded view of an embodiment with a roller flange and a torque transmitter; Fig. 5a shows a detail of an embodiment of a metallic ring for a roller flange with a torque transmitter; Fig. 5b a cross-section through an embodiment of a roller flange with torque transmitter; Fig. 6 an embodiment of an external rotor motor with a roller flange; Fig. 7 an embodiment of a roller conveyor with external rotor motor and non-electric conveyor rollers; Fig. 8 an embodiment of an electric conveyor roller with external rotor motor; Fig. 9 an embodiment of a roller conveyor with electric and non-electric conveyor rollers; and Fig. 10 an embodiment of a non-electric conveyor roller.

[0026] In Fig. 1 shows an embodiment of a roller flange 100 for mounting on an end face of a cylindrical or roller-shaped roller 200, which comprises a substantially annular plastic body 110, a bearing 120, and a metallic ring 130 surrounding the bearing 120. Only a portion of the metallic ring 130 is visible here.

[0027] The Fig. 2a to 2c show a roller flange 100 according to the improved connection concept in different views. Fig. Figure 2a shows the roller flange 100, which comprises a plastic body 110 and a bearing 120, wherein a metallic ring 130 (only in Fig. 2b and Fig. 2c) is overmolded by the plastic body 110.

[0028] The roller flange 100 has elements for force transmission, which are distributed on or positioned on a surface, in particular the peripheral surface, of the plastic body 110 and are parts of the metallic ring 130. In Fig. 2b and Fig. 2c shows examples of such force transmission elements. On the one hand, the metallic ring 130 comprises one or more locking means 150a, 150b for transmitting an axial force between the roller 200 and the roller flange 110. On the other hand, the ring 130 has one or more pins 160a, 160b, 160c, 160d for transmitting a radial force between the roller 200 and the roller flange 110.

[0029] The force transmission elements protrude from the outer surface of the plastic body 110 after the metallic ring 130 has been overmolded.

[0030] The metallic ring 130 is pushed onto the bearing 120, for example, by one or more elastic mounting means 170. This allows the ring 130 to be secured to the bearing 120 before being overmolded with plastic. For example, the mounting means can be shaped as legs that keep the ring centered on the outer ring of the bearing.

[0031] In the Fig. Figure 3 shows an exploded view of a roller flange 100 mounted on the end face of the roller 200. The metallic ring 130 includes the locking means 150a, 150b for transmitting an axial force between the roller 200 and the roller flange 110. After overmolding, the metallic ring 130 is essentially located within the plastic overmolding. Only the force transmission elements protrude beyond.

[0032] In the form of Fig. 3, the locking means 150a, 150b are shaped like a bow and have a locking means 153 for locking into an opening or groove 157 of the roller, in particular a hook.

[0033] In the form of Fig. 3, the one or more pins 160a, 160b, 160c, 160d of the roller flange form a positive connection with corresponding recesses 220a of the roller 200. This connection transmits a radial force between the roller flange 100 and the roller 200.

[0034] The Fig. 4 shows a roller flange 100 according to the improved connection concept in a further embodiment with a torque transmitter 230. The torque transmitter 230 is implemented, for example, as a pulley, but could also be implemented as a gear or similar. The torque transmitter 230 is part of the plastic body 110 of the roller flange 100. The same overmolding process that embeds the ring 130 and the bearing 120 in the plastic body can also form the torque transmitter 230. Only a single overmolding process is then necessary. The torque transmitter 230 is made of the same plastic as the plastic body.

[0035] The Fig. 5a shows a design of a ring 130 for a roller flange 100 with torque transmitter 230. The elastic attachment means 160a-160h are, in contrast to the design in Fig. 2c is extended to increase the distance between the bearing 120 and the roller 200. This places the bearing 120 in the area below the torque transmitter 230 and allows it to better dissipate the forces occurring in this area.

[0036] In the Fig. Figure 5b shows a cross-section of the embodiment. The plastic body 110 includes a portion shaped, for example, as a pulley-like torque transmitter 230. For example, the torque transmitter can transmit power to one or more V-belts.

[0037] The Fig. 6 shows an application of a roller flange 100 according to the improved connection concept in an external rotor motor 300. In a conventional design, an external rotor motor 300 comprises a rigid axle 240 with a stator 350 and a rotor 360 that rotates around the stator. The rotor 360 is a cylindrical roller or is connected to one in a rotationally fixed manner. The rotor 360 thus represents a first roller 200 within the meaning of the improved connection concept. The roller flange 100 can thus be connected at the end face to the rotor 200 of the external rotor motor, which is designed as the first roller. The torque of the electrically driven rotor 200 is transmitted from the rotor or roller 200 to the plastic body 110 of the roller flange 100 via one or more pins 160a, 160b of the ring of the roller flange.

[0038] In addition, the locking means 150a, 150b (in Fig. 6 not visible) the connection between roller flange 100 and rotor 200 against axial forces and a release of the roller flange 100 from the rotor 200.

[0039] By using the roller flange 100 with a torque transmitter 230 on an external rotor motor 300, the external rotor motor 300 can drive other non-electric conveyor rollers 310a, 310b in a roller conveyor system 330 via one or more belts 340a, 340b (see Fig. 7).

[0040] In another embodiment according to the improved connection concept, the external rotor motor 300 is part of an electric conveyor roller 320. Fig. 8 shows such an embodiment. The electric conveyor roller 320 with a roller flange 100 comprises an external rotor motor 300, a first roller 200, in particular as a rotor 360 or external rotor of the external rotor motor 300, wherein the roller flange is mounted on an end face of the first roller 200 of the external rotor motor, wherein the first roller 200 is driven by the external rotor motor. The torque of the first roller 200 is transmitted from the first roller 200 to the roller flange 100 via the one or more pins 160a, 160b, 160c, 160d of the roller flange.

[0041] The electric conveyor roller 320 further comprises a further, second roller 250, which is in contact with a material to be conveyed. This second roller 250 is also connected to the roller flange 100. For this purpose, the roller flange has a shoulder 190 with a stop. The second roller 250 is pushed onto this shoulder 190 and in contact with the stop to prevent axial displacement of the second roller. The second roller is concentric to the first roller 200 and connected to the roller flange in a rotationally fixed manner so that the torque of the roller flange 100 can be transmitted to the second roller 250. In this embodiment, the second roller 250 surrounds the first roller 200, at least partially.

[0042] In a further embodiment, the roller flange 100 has at least one pin-like fixing element 180 (see Fig. 3) for fixing the second roller 250, which additionally secures the second roller 250 against radial rotation relative to the roller flange. Fig. 3, the second roller 250 is not shown, since it would otherwise obscure the details of the underlying elements.

[0043] In a further embodiment, an electric conveyor roller 320 is equipped with a roller flange with a torque transmitter 230. With the aid of one or more belts 340a, 340b, other non-electric conveyor rollers 310a, 310b in a roller conveyor system 330 can be driven by the electric conveyor roller 320 (see Fig. 9).

[0044] In a further embodiment, the roller flange 100 can also be used in a non-electric conveyor roller 310a, as in Fig. 10. The design of the non-electric conveyor roller is identical to that of the Fig.6. The drive of the non-electric conveyor roller 310a is effected, for example, by an external rotor motor 300 or an electric conveyor roller 320 with the aid of belts 340a, 340b via the torque transmitter 230. The torque is transmitted from the roller flange 100 to the first roller 200 via the roller flange and the one or more pins 160a, 160b of the roller flange.

[0045] In a further embodiment, the roller flange 100 has one or more locking means 150a, 150b for transmitting an axial force between the first roller 200 and the roller flange 100 for axially locking the first roller to the roller flange 100. List of reference symbols 100 roller flange 110 plastic bodies 120 warehouses 130 rings 150a, 150b locking device 153 rest stops 157 Opening or groove 160a, 160b, 160c, 160d, 160e, 160f, 160g, 160h cones 170 attachments 180 fixing element 190 shoulder 200 first roll 210 Rotation axis 220a, 220b Recess of the first roller 230 torque transformer 240 rigid, non-rotating axis 250 second roll 300 external rotor motor with roller flange 310a, 310b non-electrically driven conveyor rollers 320 electrically driven conveyor roller 330 roller conveyors 340a, 340b Drive belts, especially V-belts 350 Stator of the external rotor motor 360 rotor of the external rotor motor

Claims

[1] Roller flange (100) for mounting on an end face of a cylindrical or roller-shaped roller (200), the roller flange (100) comprising - a substantially annular plastic body (110); - a warehouse (120); and - a metallic ring (130) surrounding the bearing (120); wherein - the ring (130) and the bearing (120) are at least partially embedded in the plastic body (110); - the ring (130) has elements for force transmission which are positioned distributed on or on a surface, in particular the peripheral surface, of the plastic body (110); and - the power transmission elements include: - at least one locking means (150a, 150b) for transmitting an axial force between the roller (200) and the roller flange (100), in particular for axially locking the roller (200) to the roller flange (100); and - at least one pin (160a, 160b, 160c, 160d) for transmitting a radial force, in particular a torque, between the roller (200) and the roller flange (100). [2] Roller flange (100) according to claim 1, wherein the at least one pin (160a, 160b, 160c, 160d) of the roller flange is arranged to form a positive connection with at least one corresponding recess (220a, 220b) of the roller (200). [3] Roller flange (100) according to claim 1 or 2, wherein the ring (130), the bearing (120) and the plastic body (110) are arranged coaxially to the axis of rotation of the first roller (200). [4] Roller flange (100) according to one of claims 1 to 3, wherein the ring (130) is fitted onto the bearing (120). [5] Roller flange (100) according to claim 4, wherein the ring (130) has at least one elastic attachment means (170), in particular legs, which is in contact with the bearing (120). [6] Roller flange (100) according to one of claims 1 to 5, wherein the roller flange (100) comprises at least one pin-like fixing element (180) for fixing a further roller (250) and a shoulder (190) for preventing axial displacement of the further roller (250). [7] Roller flange (100) according to one of claims 1 to 6, wherein the roller flange (100) comprises a torque transmitter (230), in particular a pulley or a gear, which is designed to transmit a torque. [8] External rotor motor (300) with a roller flange (100) according to one of claims 1 to 7, comprising the roller (200), which is designed in particular as a rotor (360) or external rotor of the external rotor motor (300), wherein - the roller flange (100) is mounted on an end face of the roller (200) of the external rotor motor (300); - the roller (200) is electrically driven; and - the at least one pin (160a, 160b, 160c, 160d) of the roller flange transmits a torque from the roller (200) to the roller flange (100). [9] Non-electric conveyor roller (310a, 310b) with a roller flange (100) according to claim 7, the conveyor roller comprising a roller (200), wherein - the roller flange (100) is mounted on the front side of the roller (200); - the roller flange (100) is designed to be driven by an external drive, in particular an external rotor motor (300), by means of the torque transmitter (230), in particular by means of a belt (340a, 340b) or gear wheel attached to the torque transmitter (230); and - the at least one pin (160a, 160b, 160c, 160d) of the roller flange transmits a torque from the roller flange (100) to the roller (200). [10] Electric conveyor roller (320) with a roller flange (100) according to one of claims 1 to 7, the conveyor roller comprising - an external rotor motor (300); - a first roller (200), which is designed in particular as a rotor (360) or external rotor of the external rotor motor (300); and - a second roller (250) arranged concentrically to the first roller (200); wherein - the roller flange (100) is mounted on an end face of the first roller (200) of the external rotor motor (300); - the first roller (200) is driven by the external rotor motor; - the at least one pin (160a, 160b, 160c, 160d) of the roller flange transmits a torque from the first roller (200) to the roller flange (100); and - the roller flange (100) transmits the torque of the first roller (200) to the second roller (250). [11] Electric conveyor roller (320) according to claim 10, wherein - the roller flange (100) comprises a torque transmitter (230), in particular a pulley or a gear, which is designed to transmit a torque; and - the conveyor roller is configured to transmit torque to at least one non-electric conveyor roller (310a, 310b) of a roller conveyor (330) by means of the torque transmitter (230), in particular by means of a belt (340a, 340b) or gear wheel attached to the torque transmitter (230). [12] Electric conveyor roller (320) according to claim 10 or 11, wherein the roller flange (100) comprises at least one pin-like fixing element (180) for fixing the second roller (250) and a shoulder (190) for preventing axial displacement of the second roller (250).

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