FAN SET WITH SUPPORT FOR BEARING FASTENING RING ASSEMBLY AND ASSEMBLY METHOD

Abstract

The present invention refers to a fan set that has at least one circular support (3) on which a bearing fastening ring (7) can be supported during the process of fastening the closing cover (9) on the bearing already pressed onto the shaft, facilitating the process of assembling the bearing fastening ring (7) and reducing the length of the motor. After the complete fastening of the bearing fastening ring (7), it stops touching the fan, which can rotate freely.

Claims

1. A FAN SET WITH SUPPORT FOR BEARING FASTENING RING ASSEMBLY comprising: at least two blades (2) fastened to a front face of a circular support (3); said circular support (3) comprising a coaxial fastening hole (4) for fastening the fan set to a shaft; at least one prop (5) located on a rear face of said circular support (3); at least one bearing fastening ring (7) connected to said circular support (3) by at least one fastening element (8).

2. THE FAN SET according to claim 1, wherein the bearing fastening ring (7) is in the form of a semicircle, full circle or interrupted support regions.

3. THE FAN SET according to claim 1, wherein the at least one prop (5) is configured as an undercut and/or shoulder in the rear face of the circular support.

4. THE FAN SET according to claim 1, wherein the at least one prop (5) is configured as a shoulder and/or undercut in the front face of the circular support.

5. THE FAN SET according to claim 1, wherein said fastening element (8) is a reversible fastening element.

6. THE FAN SET according to claim 1, further comprising structural reinforcements (6) placed over the at least one prop on the rear face of the circular support.

7. THE FAN SET according to claim 1, wherein it further comprises a baffle (1) connected to said at least two blades (2) in a circumferential direction along the shaft.

8. THE FAN SET according to claim 1, wherein the fan set is made of a polymeric material, a blend or a copolymer.

9. A BEARING FASTENING RING ASSEMBLY METHOD comprising the steps of: A) positioning at least one bearing fastening ring (7) to connect to a circular support (3) by at least one fastening element (8) of a fan set comprising: at least two blades (2) fastened to a front face of the circular support (3); said circular support (3) comprising a coaxial fastening hole (4) for fastening the fan set to a shaft; at least one prop (5) located on a rear face of said circular support (3); B) assembling a motor closing cover (9) and positioning the at least one fastening element (8) so as to connect the motor closing cover with the fan set; C) fastening the at least one fastening element (8) and, consequently, locking the fan set with the motor closing cover, while ensuring the at least one bearing fastening ring (7) does not touch the circular support (3) of the fan set.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0015] To assist in identifying the main features of the present invention, the figures to which references are made are presented, as follows:

[0016] FIG. 1 represents a perspective view of said fan with emphasis on the rear portion of the set of the present invention comprising: optionally a baffle (1); at least two blades (2); a circular support (3) with a fastening hole (4) coaxial in its central portion and at least one prop (5). Alternatively, the present invention may have structural reinforcements (6) along one face of the center hole.

[0017] FIG. 2 represents a perspective view of said fan with emphasis on the front portion of the set of the present invention comprising: optionally a baffle (1); at least two blades (2); a circular support (3) with a coaxial fastening hole (4) for fastening the fan on the shaft. Alternatively, the present invention may have at least one prop (5) configured as an undercut and/or shoulder in the rear portion of the set and/or a shoulder and/or undercut in the front portion of said set, depending on the geometry of the fan. Further, alternatively, the side not used as a support for assembling the bearing fastening ring (7), either the front or rear one, can be smooth, not having shoulders and/or undercuts.

[0018] FIG. 3 represents a rear view of said fan with emphasis on the components: optionally a baffle (1); at least two blades (2); fastening hole (4) coaxial for fastening the fan on the shaft; at least one prop (5). Alternatively, the present invention may have structural reinforcements (6) along one face of the center hole.

[0019] FIG. 4 represents a front view of said fan with emphasis on the components: optionally a baffle (1); at least two blades (2) and a fastening hole (4) coaxial with said fan body.

[0020] FIG. 5 represents a perspective view of the entire set of said adapted fan, with emphasis on the bearing fastening ring (7) connected to said circular support (3) by at least one fastening element (8).

[0021] FIG. 6 represents a side view of said fan set, with emphasis on the bearing fastening ring (7) comprising at least one fastening element (8) still not being connected to said circular support (3).

[0022] FIG. 7 represents a schematic differentiation between the state of the art and the proposed solution demonstrating the difference between the distances (D) and (d), indicating the decrease in the length of the component due to the reduction of the gap between the closing cover (9) of the motor and the fan.

[0023] FIG. 8 schematically represents the steps for assembling the bearing fastening ring: A) Positioning the bearing fastening ring (7) on the fan; B) Assembly of the closing cover (9) of the motor on the bearing; C) Positioning and fastening of the fastening elements (8) in the bearing fastening ring and locking the set.

DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention refers to a fan set with support for a bearing fastening ring specifically used in electrical machines, comprising: [0025] at least two blades (2) fastened to the front face of a circular support (3); said circular support (3) comprising a coaxial fastening hole (4) for fastening the fan to the shaft; [0026] at least one prop (5) located on the rear face of said circular support (3); at least one bearing fastening ring (7) connected to said circular support (3) by at least one fastening element (8).

[0027] Said fastening element (8) is preferably a reversible fastening element, such as a screw/nut set. Alternatively, said fastening element (8) could be an irreversible fastening element, such as a rivet.

[0028] Said blades (2) are fastened preferably, but not limited, perpendicularly to the front face of said circular support (3).

[0029] Said bearing fastening ring (7) preferably assumes the shape of a semicircle, and may also assume the shape of a complete circle or interrupted support regions, the operation of the present invention being independent of the geometry of the fastening ring.

[0030] In accordance with the fastening ring to be used, the present set preferably comprises a support if the fastening ring (7) is only on one side of the bearing. In addition, the present set preferably comprises at least two supports if the fastening ring is a fastening ring of semicircular or full circular shape.

[0031] In one embodiment of the present invention, the supports are required only by the constructive part, but are not mandatory, as they depend on the geometry of the fan base.

[0032] Alternatively, the present invention may comprise structural reinforcements (6) along one face of the central fastening hole (4).

[0033] The present invention optionally further comprises a baffle (1) connected to said at least two blades (2) in a circumferential direction along the fan shaft.

[0034] In the example of the present invention, the fan is directed towards the front of the electric machine (shaft end). However, it should be highlighted that, depending on the design of said machine, the fan could be directed towards the inner part of the same, and the at least one prop (5) would be located in the front portion of the fan set.

[0035] It should be highlighted that the use of the invention eliminates the need for the operator's manual operation or another assembling device inside the motor (between the fan and the cover) to keep the bearing fastening ring (7) immobile, using in its place is the circular support (3) of the fan. As a result, the gap between the closing cover (9) of the motor and the fan can be reduced, consequently reducing the length of the motor. After the fastening elements (8) are completely fastened in the bearing fastening ring (7) on the outside of the motor, the bearing fastening ring (7) stops touching the circular support (3) of the fan, and the shaft can rotate freely.

[0036] The fan can be manufactured in different ways depending on the material to be used. This concept can be used mainly, but not exclusively, in fans made of polymer, aluminum, cast iron, steel, wood, among others. Said fan is preferably produced from a polymeric material, a blend or a copolymer.

[0037] In short, the aforementioned assembly/alignment of the bearing fastening ring (7) is carried out by a method that comprises the following steps: [0038] A) Positioning of the bearing fastening ring (7) on the fan; [0039] B) Assembly of the motor closing cover (9) and positioning of the fastening elements (8); [0040] C) Fastening the fastening elements (8) and, consequently, locking the set, so that the bearing fastening ring (7) does not touch the circular support (3) of the fan.

[0041] The easiness of assembly/alignment is obtained by the freedom of the operator to support the bearing fastening ring (7), with the fastening element (8) supported, and align the fastening element (8) of the bearing fastening ring (7) for assembling the closing cover (9), without the need for the operator's hand or additional assembly device to hold the fastening ring (7), facilitating and speeding up the process by having one assembly step less.

[0042] As this introduction of an extra support (operator's hand or assembling device) for the bearing fastening ring is not necessary, the distance between the fan and the bearing fastening ring can be reduced. After complete fastening of the bearing fastening ring, this component stops touching the fan and the shaft is free to rotate.

[0043] Those skilled on the art will value the knowledge presented herein and will be able to reproduce the invention in the presented embodiments and in other variants, encompassed in the scope of the appended claims.