Sheet for introducing slot closure element into stator slot of stator of electric machine, and device and method for introducing slot closure element into corresponding associated stator slot

Abstract

The invention relates to a sheet (10) for introducing a slot closure element (3) into a stator slot (7) in a stator (4) of an electric machine (5), the sheet (10) having an elongated design and having a connecting end (10.1) and an insertion end (10.2) as seen in a main extension direction (H), the sheet (10) has, on a first side facing the connection end (10.1), a receiving portion (A) for receiving the slot closure element (3) and, on a second side facing the insertion end (10.2), a guide portion (F), the guide portion (F) having a projection (12) which extends perpendicularly with respect to a main extension direction (H), the slot closure element (3) is formed along a first transverse direction (Q1) and intended for guiding the sheet (10) when the slot closure element (3) is introduced into the associated stator slot (7).

Description

Technical Field

[0001] This invention relates to a sheet-like member for introducing slot-sealing elements into stator slots of an electric motor. Furthermore, this invention relates to apparatus and methods for introducing individual slot-sealing elements into designated stator slots of an electric motor. Background Technology

[0002] In the prior art, the introduction of slot-closing elements—commonly referred to as cover slides or slot-closing wedges—into the stator of a motor, particularly a motor designed with an internal rotor, is typically performed automatically by means of a device with plate-like components, each comprising a slot-closing element. The introduced plate-like components are moved parallel to the longitudinal direction of the stator or parallel to the axis of rotation of the motor such that each slot-closing element is axially inserted into a stator slot. The known methods of introducing slot-closing elements into the stator slots have the following disadvantages: the plate-like components can be pressed radially toward the slot opening by the windings arranged in the stator slots. This can lead to incorrect positioning of the slot-closing elements. However, the plate-like components can also be damaged by forces acting in the radial direction, for example, because the plate-like components become stuck in the stator slots. Summary of the Invention

[0003] In this context, the goal is to provide a solution that reduces the risk of mispositioning of slot closure elements and damage to sheet-like components.

[0004] This objective is achieved by a plate-like component for introducing slot-sealing elements into the stator slots of the motor stator. The sheet-like component has an elongated design and a connecting end and an insertion end about the main extension direction. The sheet-like member has a receiving portion on its first side facing the connecting end for receiving the groove closing element, and a guiding portion on its second side facing the insertion end. The guide portion has a protrusion that extends perpendicular to the main extension direction and is formed in a first transverse direction. The protrusion is used to guide the plate when the slot closing element is introduced into a designated stator slot.

[0005] According to the invention, the sheet has a receiving portion in which the slot-closing element can be received when the sheet is introduced into the stator. Furthermore, the sheet has a guiding portion that guides the sheet when it is introduced into the stator slot of the stator. For guiding purposes, a protrusion extending in a first transverse direction is provided in the guiding portion. This protrusion can be guided in the stator slot such that it is radially arranged inward relative to the slot opening, particularly relative to the narrowing portion of the stator slot located in the slot opening region. This prevents the slot-closing element from accidentally leaving through the slot opening. The risk of the slot-closing element unintentionally leaving the slot opening and / or becoming stuck in the stator slot, and / or the sheet buckling and associated damage, can be reduced.

[0006] According to a preferred embodiment of the invention, the sheet member has two protrusions, which are preferably designed to be symmetrical about a plane of symmetry of the sheet member, the plane of symmetry being designed to be parallel to the main extension direction. Forming two protrusions on the sheet member, particularly forming two protrusions symmetrically, can increase guiding accuracy during the axial introduction of the sheet member. The protrusions may have profiles including straight portions, angled portions, rounded portions, and / or curved portions. Furthermore, the protrusions in the first transverse direction may taper to a point. The protrusions may extend along the entire length of the guiding portion, particularly parallel to the main extension direction. Alternatively, the protrusions may have multiple elongated individual portions, each extending along a straight line, particularly parallel to the main extension direction. To simplify the introduction of the sheet member into the stator slot of the stator, each protrusion may have a rounded portion and / or a chamfered portion and / or a beveled portion in the initial region of the sheet member.

[0007] The sheet-like member according to the invention is particularly suitable for introducing slot-closing elements into stator slots of an electric motor, the stator slots having a narrowing portion in the area of ​​the slot opening. The protrusion of the sheet-like member can engage behind the narrowing portion of the stator slot, and thus prevent the slot-closing element from exiting radially through the slot opening.

[0008] According to a preferred embodiment of the invention, a shoulder is formed between the receiving portion of the sheet and the associated guiding portion, and the shoulder extends along a second lateral direction, which is designed to be perpendicular to the main extension direction and the first lateral direction.

[0009] Because of the shoulder, the slot closing element arranged in the receiving portion can be introduced into the designated stator slot of the stator in a protected manner. Therefore, the risk of damage to the slot closing element during relative movement with respect to the stator lines can be reduced.

[0010] According to a preferred embodiment of the invention, a variable width of the sheet is provided in the main extending direction, which extends parallel to the second lateral direction. In particular, the variable width can be used to form the aforementioned shoulder between the guide portion and the receiving portion.

[0011] According to a preferred embodiment of the invention, the receiving portion has a receiving length parallel to the main extension direction, which is greater than or equal to the length of the slot closing element. With a sufficiently large receiving length, the slot closing element can be received within the associated receiving portion and cover the entire slot length of the stator or the entire slot gap opening, thus achieving electrical insulation. Therefore, short circuits between the motor wires and the stator can be avoided. The slot closing element can also be longer than the slot length of the stator slot.

[0012] According to an advantageous embodiment of the invention, the sheet is configured such that the guide portion can be introduced into the stator slot assigned to the sheet in front of the receiving portion. By first introducing the guide portion of the sheet into the designated stator slot, and in particular first introducing the insertion end of the sheet into the designated stator slot, the sheet can be guided throughout the introduction process.

[0013] According to a preferred embodiment of the invention, a connecting portion formed perpendicular to the main extension direction is provided for holding and moving the sheet member, and the connecting portion is formed on the connecting end of the sheet member. The connecting portion may extend, in particular, along a second lateral direction. The connecting portion may be form-fitted and / or force-fitted connected to one or more sheet member holders, through which the sheet member can be moved.

[0014] According to an advantageous embodiment of the invention, a groove is provided at the insertion end for optimized positioning of the sheet member. The groove can extend parallel to the second lateral direction along the radial direction of the motor and thus perpendicular to the protrusion. Geometrically corresponding protruding elements can mechanically interact with the groove and improve the positioning of the sheet member.

[0015] The present invention also relates to an apparatus for introducing slot-sealing elements, each into a designated stator slot of a motor stator, the apparatus having a plurality of plate-like members movable along the longitudinal direction of the stator, wherein... Each of the sheet-like components has a receiving portion and a guiding portion; the receiving portion is used to receive the groove and close the element. Each of the guide portions has a protrusion extending in the circumferential direction of the stator, which is used to guide the plate-like member when the slot closing element is introduced into the designated stator slot.

[0016] The present invention also relates to a method for introducing slot-closing elements, each into a designated stator slot of a stator of an electric motor having a rotation axis. The system includes multiple sheet-like components capable of moving parallel to the rotation axis. Each sheet-like component has a receiving portion and a guiding portion. Each receiving portion has a slot-closing element, and each guiding portion has a protrusion extending along the circumferential direction of the stator for guiding the sheet-like component. Each slot-sealing element is introduced into a designated stator slot.

[0017] The same technical effects and advantages as described in conjunction with the sheet element according to the invention can be achieved by using the means and methods for introducing the groove closing element.

[0018] According to an advantageous embodiment of the invention, the stator teeth of the motor have recesses, and the protrusions of the plate-like members move along the recesses. Preferably, each stator tooth has two recesses extending in the circumferential direction of the stator, and the recesses are preferably formed symmetrically about the radial direction of the motor. Alternatively, the two protrusions of the plate-like members and the two recesses of the stator teeth can be asymmetrical about the radial direction. For example, a first protrusion of the first plate-like member can be formed at a first radius, and a second protrusion of the first plate-like member can be formed at a second radius. Similarly, a first recess of the first stator tooth can be formed at a first radius, and a second recess of the first stator tooth can be formed at a second radius.

[0019] The preferred and advantageous embodiments and features described in conjunction with the sheet-like components according to the invention can also be applied individually or in combination to the apparatus and method according to the invention. Attached Figure Description

[0020] Further details and advantages of the invention will now be explained with reference to exemplary embodiments shown in the accompanying drawings. In the drawings: Figure 1 Figure 'a' in the figure schematically illustrates an exemplary embodiment of the sheet-like component according to the present invention in a perspective view; Figure 1 b in the diagram schematically shows the source from the side view. Figure 1 The sheet-like component of 'a' in the text; Figure 2 The 'a' in the detailed view CC schematically shows the source from Figure 1 Top view of the sheet-like component 'a' in the diagram; Figure 2 b is based on the source Figure 1 The detailed view of b in DD schematically shows the source. Figure 1 Another top view of the sheet-like component 'a' in the diagram; Figure 3 A detailed view of the motor according to the invention is schematically shown; and Figure 4The apparatus according to the invention for introducing slot closure elements into designated stator slots is illustrated schematically. Detailed Implementation

[0021] Figure 1 Figure 'a' schematically illustrates, in perspective, an exemplary embodiment of a sheet member 10 according to the invention, used for introducing a slot-closing element 3 into a stator slot 7 of a stator 4 of a motor 5. The sheet member 10 has an elongated design and has a connecting end 10.1 and an insertion end (10.2) about the main extension direction H. The sheet member 10 has a receiving portion A on a first side facing the connecting end 10.1 for receiving the slot-closing element 3, and a guiding portion F on a second side facing the insertion end 10.2, the guiding portion F having a protrusion 12 extending perpendicularly to the main extension direction H and formed in a first transverse direction Q1, the protrusion guiding the sheet member 10 when the slot-closing element 3 is introduced into the designated stator slot 7. Figure 1 The exemplary embodiment shown in Figure a also has two protrusions 12, wherein the protrusions 12 are designed to be symmetrical about a plane of symmetry of the sheet member 10, the plane of symmetry being designed to be parallel to the main extension direction H, but not in the plane of symmetry. Figure 1 As shown in a. The protrusion 12 is also designed to be symmetrical about the radial direction R of the motor 5 (not shown).

[0022] Figure 1 b in the diagram schematically shows the source from the side view. Figure 1 The sheet-like member 10 has a variable width B in the main extending direction H, which extends parallel to the second lateral direction Q2 and the radial direction R of the motor 5. Furthermore, Figure 1 a and Figure 1 An exemplary embodiment of the sheet member 10 shown in Figure b has a shoulder between the receiving portion A and the guiding portion F, the shoulder extending along a second lateral direction Q2 perpendicular to the main extension direction H and the first lateral direction Q1. The sheet member 10 tapers from the connecting end 10.1 to the insertion end 10.2 at least on one side, and at least partially tapers to a point. Furthermore, the receiving portion A has a receiving length parallel to the main extension direction H, which is at least as long as the length of the slot closure element.

[0023] The sheet-like member 10 has a connecting portion V formed perpendicular to the main extending direction H. The connecting portion is used to hold and move the sheet-like member 10, and the connecting portion V is formed on the connecting end of the sheet-like member 10. Furthermore, the sheet-like member 10 has a groove on the end face of the insertion end 10.2 (in... Figure 1 a and Figure 1 (Not visible in b) This groove is used for optimized positioning of the sheet element 10. The groove can mechanically interact with the element.

[0024] Figure 2 The 'a' in the detailed view CC schematically shows the source from Figure 1 The image shows a top view of the sheet-like member 10 and the slot-closing element 3 received in the receiving area A of the sheet-like member 10. The sheet-like member 10 can be described as having a T-shaped profile. Figure 2 b is based on the source Figure 1 The detailed view of b in DD schematically shows the source. Figure 1 Another top view of the sheet 10 in section a, wherein the protrusion 12 in the guide region F of the sheet 10 is visible.

[0025] Figure 3 A detailed view of the motor 5 is schematically shown. The stator 4 of the motor 5 has stator teeth 14 extending in the radial direction R. The stator teeth 14 have recesses 16 that correspond geometrically to protrusions 12, and the protrusions 12 of the sheet member 10 are movable along the recesses. By guiding the protrusions 12 along the recesses 16, movement of the sheet member 10 in the radial direction can be prevented or at least reduced.

[0026] Figure 4 A device 1 for introducing slot-sealing elements 3 into designated stator slots 7 of the stator 4 of the motor 5 is schematically shown. The device has a plurality of sheet-like members 10 movable along the longitudinal direction L of the stator 4. Simultaneously, the slot-sealing elements 3 can be introduced into the corresponding stator slots of the stator 4. Each sheet-like member 10 has a receiving portion A and a guiding portion F, the receiving portion for receiving the slot-sealing element 3 in its respective case. Each guiding portion F has a protrusion 12 extending along the circumferential direction U of the stator 4, the protrusion for guiding the sheet-like member 10 when the slot-sealing element 3 is introduced into the designated stator slot 7.

[0027] List of reference numerals 1 device 2 stator windings / wires 3-slot enclosed element 4 stators 5 motors 7 stator slots 10 pieces 10.1 Connection end 10.2 Insertion end 12 protrusions 14 stator teeth 16 recesses A. Acceptance Section B width F-guide section H main extension direction L longitudinal direction R radial direction U-shaped direction V-connection section Q1 First horizontal direction Q2 Second Horizontal Direction

Claims

1. A sheet (10) for introducing slot closure elements (3) into stator slots (7) of a stator (4) of an electric machine (5), wherein the sheet (10) having an elongated design and having a connection end (10.1) and an insertion end (10.2) with respect to a main extension direction (H), the sheet (10) having a receiving portion (A) on a first side facing the connection end (10.1) for receiving the slot closure elements (3) and having a guide portion (F) on a second side facing the insertion end (10.2), characterized in that the guide portion (F) has a protrusion (12) extending perpendicular to the main extension direction (H) and formed in a first transverse direction (Q1), the protrusion serving to guide the sheet (10) when the slot closure elements (3) are introduced into the associated stator slots (7).

2. The sheet (10) according to claim 1, characterized in that The sheet (10) has two protrusions (12) which are preferably designed symmetrically with respect to a symmetry plane of the sheet (10), the symmetry plane being formed parallel to the main extension direction (H).

3. The sheet (10) according to claim 1 or 2, characterized in that A shoulder is formed between the receiving portion (A) and the associated guide portion (F) of the sheet (10), wherein the shoulder extends in a second transverse direction (Q2) formed perpendicular to the main extension direction (H) and the first transverse direction (Q1).

4. The sheet (10) according to claim 3, characterized in that The sheet (10) has a variable width (B) in the main extension direction (H), wherein the width (B) extends parallel to the second transverse direction (Q2).

5. The sheet (10) according to any one of the preceding claims, characterized in that The receiving portion (A) has a receiving length parallel to the main extension direction (H), the receiving length being greater than or equal to a slot closure element length.

6. The sheet (10) according to any one of the preceding claims, characterized in that The sheet has a connection portion (V) formed perpendicular to the main extension direction (H) for holding and moving the sheet (10), wherein the connection portion (V) is formed on the connection end of the sheet (10).

7. The sheet (10) according to any one of the preceding claims, characterized in that The sheet has a slot at the insertion end for optimized positioning of the sheet (10).

8. A device (1) for introducing slot closure elements (3) each into a specified stator slot (7) of a stator (4) of an electric machine (5), the device having a plurality of sheets (10) which are movable in a longitudinal direction (L) of the stator (4), characterized in that the sheets (10) each have a receiving portion (A) for receiving a slot closure element (3) in each case and a guide portion (F), the guide portions (F) each have a protrusion (12) extending in a circumferential direction (U) of the stator (4), the protrusion serving to guide the sheet (10) when the slot closure element (3) is introduced into the specified stator slot (7).

9. A method for introducing slot closure elements (3) individually into a specified stator slot (7) of a stator (4) of an electric machine (5) having an axis of rotation (D), wherein a plurality of sheet-like pieces (10) are provided, which are movable parallel to the axis of rotation (D), each having a receiving portion (A) and a guiding portion (F), the receiving portions each having a slot closure element, and the guiding portions (F) each having a protrusion (12) extending in a circumferential direction (U) of the stator (4) for guiding the sheet-like pieces (10), the slot closure elements (3) are each introduced into a specified stator slot (7).

10. The method of claim 9, wherein, The stator teeth (14) of the electric machine (5) have recesses (16), along which the protrusions (12) of the sheet-like pieces (10) are moved.

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