A rotor

Abstract

The present invention relates to a rotor (1), wherein there is a threaded connection between the rotor stacks (2) and the shaft (5), and wherein the movement received from the shaft (5) is enabled to be transferred to the rotor stack (2) by means of a form-fit connection.

Description

[0001] DESCRIPTION

[0002] A ROTOR

[0003] Technical Field

[0004] The present invention relates to a rotor wherein there is a threaded connection between the rotor stacks and the shaft and wherein the movement received from the shaft is enabled to be transferred to the rotor stack by means of a form-fit connection.

[0005] Background of the Invention

[0006] Electric motors comprise two main parts as a stationary stator and a rotor that performs rotational movement by means of a shaft. Inside the rotor, there are magnets that generate current and are permanently placed. The rotor is fixed to the shaft with an interference fit, a pressing machine is used in the interference fit process and the rotor stacks are placed on the rotor shaft. Today, placing the stacks takes time when the rotor stacks are pressed with a very high pressing force in the assembly process with pressing, which is one of the processes of joining the shaft and rotor stacks to each other by means of machines with high pressing force or by cooled and heated additional processes. In order to reduce the pressing force, processes such as cooling the shaft or heating the rotor stacks can be applied during assembly. However, since the assembly steps included in the state of the art require additional processes, today, there is a need for rotors which will reduce the pressing force without applying additional processes and are subjected to an assembly process that is at least as strong as an interference fit.

[0007] The Chinese patent document no. CN101232216A, an application included in the state of the art, discloses an electric motor, wherein the external threaded shaft and the internal threaded rotor are connected to each other. This invention discloses a variable frequency speed control AC drive motor specifically designed for electric vehicles. This motor comprises a stator, rotor, front and rear covers. The stator consists of a casing and a winding iron core. There are a plurality of cooling fins on the external surface of the casing. The rotor consists of a shaft and a cage type rotor iron core. The shaft extension uses an external spline gear to transfer the torque. The front cover is equipped with external locking slots in order to be positioned with an automobile gearbox crankcase. The winding iron core is equipped with three-phase symmetrical double layer winding coils, coated by using cold-rolled silicon steel sheets and impregnated in vacuum pressure. The rotor consists of a shaft and cage type rotor iron core and is mounted by using a heavy-duty interference fit and thermal slot assembly. The cage-type rotor iron core is formed by nailing the rotor stampings first into the slots and then completed with guides mounted between them. The rotor stampings have arms, shaft hole, a plurality of teeth on the outer round surface and slots between them mounted on the guide. The slots mounted on the guide get progressively smaller sectionally towards the outer round surface of the rotor.

[0008] Summary of the Invention

[0009] An object of the present invention is to realize a rotor, wherein the rotor and the part of the shaft on which the rotor fits are in a threaded structure during the assembly of the rotor stacks to the shaft, and wherein the movement received from the shaft is enabled to be transferred to the rotor stack by means of a form-fit connection.

[0010] Another object of the present invention is to realize a rotor which enables the pressing force to be reduced during the placement of the rotor stack on the shaft and the movement to be transmitted by a form-fit connected structure. A further object of the present invention is to realize a rotor which enables additional processes, such as heating or cooling, to be eliminated during the assembly process.

[0011] Detailed Description of the Invention

[0012] “A Rotor” realized to fulfil the objectives of the present invention is shown in the figures attached, in which:

[0013] Figure l is a perspective view of an inventive rotor.

[0014] Figure 2 is another perspective view of an inventive rotor.

[0015] Figure 3 is a perspective view of the body included in an inventive rotor.

[0016] Figure 4 is a view of the magnets included in an inventive rotor.

[0017] Figure 5 is a view of the bearings included in an inventive rotor.

[0018] Figure 6 is a view of the balance ring included in an inventive rotor.

[0019] Figure 7 is a view of the ring included in an inventive rotor.

[0020] Figure 8 is a perspective view of the shaft included in an inventive rotor.

[0021] The components illustrated in the figures are individually numbered, where the numbers refer to the following:

[0022] 1. Rotor

[0023] 2. Stack

[0024] 3. Slot

[0025] 4. Groove

[0026] 5. Shaft

[0027] 6. Thread

[0028] 7. Bearing

[0029] 8. Ring

[0030] 9. Balance disk

[0031] 10. Magnet An inventive rotor (1) which enables assembly between the rotor stack and the shaft to be realized by means of a form-fit connection comprises; at least one rotor stack (2) which comprises at least one slot (3) through which a shaft passes; a plurality of grooves (4) which are located on the surface of the rotor stack (2) that contacts the said shaft; and at least one shaft (5) which performs a form-fit connection by engagement with the grooves (4) in the slot (3) located in the rotor stack (2) and which comprises a plurality of threads (6) on the surface facing the slot (3).

[0032] The rotor stack (2) included in an inventive rotor (1) is assembled to the shaft (5) by means of an engagement and performs rotational movement on a stator together with the shaft (5). The rotor stack (2) comprises an internal threaded slot (3) having a substantially circular shape and a plurality of grooves (4), into which the shaft (5) enters. The slot (3) extends along the rotor stack (2).

[0033] The shaft (5) included in an inventive rotor (1) comprises a plurality of threads (6) thereon such that they are on the part contacting the rotor stack (2) and fit into the grooves (4) in the slot (3). The shaft (5) provides a form-fit connection to the slot (3) in the rotor stack (2) via its threaded structure, and in this way, the power transmission is realized by means of a form-fit connection. The shaft (5) provides power transmission and has the thread (6) only in the area that contacts the rotor stack (2) slot (3).

[0034] An inventive rotor (1) further comprises at least two bearings (7) so as to be located on the shaft (5) and on both sides of the rotor stack (2). The bearings (7) are bearing elements for preventing metal -to-metal contact between two moving parts. In this way, metal contact between the stationary stator placed on the rotor stack (2) and the shaft (5) is prevented. An inventive rotor (1) further comprises at least one ring (8) which is used for fixing the bearings (7) on the shaft (5) and acts as a clamping element. By means of the ring (8), unintentional disengagement of the bearings (7) from the shaft (5) is prevented.

[0035] An inventive rotor (1) further comprises at least one balancing disk (9) which is fixed to the rotor stack (2) and enables balancing disturbances that may be caused by any part during rotation to be reduced. The balancing disk (9) is located on at least one of the upper and lower surfaces of the rotor stack (2) that is of cylindrical shape.

[0036] An inventive rotor (1) further comprises a plurality of magnets (10) which are placed in cavities located on the rotor stack (2) and permanently located on the rotor stack (2). By means of the magnets (10), current passage is enabled between the rotor (1) and the stator. In another preferred embodiment, the rotor stack (2) comprises a conductive material which is filled therein for current passage. In this way, for rotor stacks (2) that do not comprise magnets (10), current passage is enabled by conductive materials.

[0037] In an inventive rotor (1), the rotor stack (2) is assembled to the shaft (5) by pressing method, and during the assembly process, the grooves (4) of the rotor stack (2) are inserted into the threads (6) located on the shaft (5). In this way, a connection between the rotor stack (2) and the shaft (5) at least as strong as an interference fit is enabled with a lower applied pressing force compared to the methods included in the state of the art. Since a form-fitting connection is realized between the groove (4) and the thread (6), the rotational movement received from the shaft (5) is transferred to the rotor stack by fitting of the groove (4) and the thread (6) to each other and the rotor (1) can rotate within the stator in an electric motor. On the other hand, during the placement of the rotor stack (2) on the shaft (5), the pressing force is reduced compared to the interference fit assembly in the state of the art, and since the movement is transferred by a form-fit connection structure, there is no need for additional processes such as heating or cooling during the assembly process.

[0038] Within these basic concepts; it is possible to develop various embodiments of the inventive “A Rotor (1)”; the invention cannot be limited to examples disclosed herein and it is essentially according to claims.

Claims

CLAIMS1. A rotor (1) which enables assembly between the rotor stack and the shaft to be realized by means of a form-fit connection characterized by at least one rotor stack (2) which comprises at least one slot (3) through which a shaft passes; a plurality of grooves (4) which are located on the surface of the rotor stack (2) that contacts the said shaft; and at least one shaft (5) which performs a form-fit connection by engagement with the grooves (4) in the slot (3) located in the rotor stack (2) and which comprises a plurality of threads (6) on the surface facing the slot (3).

2. A rotor (1) according to Claim 1; characterized by the rotor stack (2) which is assembled to the shaft (5) by means of an engagement and performs rotational movement on a stator together with the shaft (5).

3. A rotor (1) according to Claim 1 or 2; characterized by the rotor stack (2) which comprises an internal threaded slot (3) having a substantially circular shape and a plurality of grooves (4), into which the shaft (5) enters.

4. A rotor (1) according to any one of the preceding claims; characterized by the shaft (5) which comprises a plurality of threads (6) thereon such that they are on the part contacting the rotor stack (2) and fit into the grooves (4) in the slot (3).

5. A rotor (1) according to any one of the preceding claims; characterized by the shaft (5) which provides power transmission and has the thread (6) only in the area that contacts the rotor stack (2) slot (3).

6. A rotor (1) according to any one of the preceding claims; characterized by at least two bearings (7) which are located so as to be on the shaft (5) and on both sides of the rotor stack (2).

7. A rotor (1) according to any one of the preceding claims; characterized by at least one ring (8) which is used for fixing the bearings (7) on the shaft (5) and acts as a clamping element.

8. A rotor (1) according to any one of the preceding claims; characterized by at least one balance disk (9) which is fixed to the rotor stack (2) and enables balancing disturbances that may be caused by any part during rotation to be reduced.

9. A rotor (1) according to any one of the preceding claims; characterized by a plurality of magnets (10) which are placed in cavities located on the rotor stack (2) and permanently located on the rotor stack (2).

10. A rotor (1) according to any one of the preceding claims; characterized by the rotor stack (2) which comprises a conductive material which is filled therein for current passage.

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