MXPA98001041A - Bob support - Google Patents

Abstract

The present invention relates to a coil support for accommodating at least one wire of the coil of an electromagnet, more particularly for use in electromagnetic valves, including a hollow cylinder-shaped support part having ends that are provided with stops that define the coil in its axial position. The support part (1) has a step (3) in its diameter that is limited on both sides by the wire (2) of the coil with different winding layers where the wire (2) of the bobbin is skived

Description

"COIL SUPPORT" The present invention relates to a coil support for accommodating at least one wire of the coil of an electromagnet, more particularly for use in electromagnetic valves, in accordance with the preamble of patent claim 1. German Patent Application Number 41 41 546 discloses a coil support for accommodating a coil wire for an electromagnet. The coil support includes a hollow cylinder support part having ends that are provided with disk-shaped stops. The height of the wire coil and the internal and external diameter are determined by dimensioning the part or part of the support. However, it is necessary in special cases of application, to be able to vary the number of coil windings through the height of the hollow cylinder-shaped support part without free space occurring in the winding layers that deteriorate the function . This object is achieved with respect to a coil support of the aforementioned type by the characterization features of claim 1 of the patent, in accordance with which the support piece in its diameter has a step that is limited on both sides by the wire of the coil, with a different number of winding layers and where the coil wire is guided. The sub-claims appended to claim 1 include embodiments related to the present invention. The present invention will be explained below by means of a drawing. Figure 1 shows an exemplary view of a modality of a coil support that can be used especially in electromagnetic valves, comprising the hollow cylinder-shaped support part 1 having ends that include disc-shaped stops 8 that define the coil in its axial position after the wire 2 of the coil has been completely wound. At about half the length of the winding of the coil wire 2, the support part 1 has a step 3 in the outer diameter which is uniformly covered by the coil wire 2 after several coiling layers when after When the annular grooves 6 are filled, the diameter of the winding layer in the portion of the support part 1 with the smallest outer diameter has reached the large outer diameter. In order to wind the bobbin wire 2 in the support piece 1, the step 3 has a recess 4 which guides the wire 2 of the bobbin in the desired winding direction. The recess 4 is limited by a radially circumferential collar 5 in the step 3. The support part 1 includes a number of annular grooves 6 arranged in parallel side by side. In the large outer diameter of the support part 1, several annular grooves 6 placed side by side have crank portions each in the form of a groove offset 7, where the coil wire 2 is laterally deflected during the operation of winding. Each offset 7 of the slot has an angle of deviation alpha, identical in size and direction with respect to the respectively adjacent slot offset 7. It can be seen from the drawing that the off-center 7 of the slot are in relative alignment with each other. The recess 4 in the step 3 is also placed in the alignment plane XY of the off-center 7 of the slot. The offsets 7 of the slot are placed in the area of the support part having the largest effective diameter. To clarify the construction design of the support piece 1, the drawing exclusively shows a first winding layer of the wire 2 of the coil in a section. The drawing shows that the wire 2 of the coil is forced to follow the change in the direction of the support piece 1 in the area of the offset 7 of the groove oriented laterally towards the axis of the longitudinal coil. Thus, with an increased number of windings of the coil wire 2, along the annular grooves 6, there is a parallel alignment in the same direction through the longitudinal axis of the support part 1. This ensures reliable guidance of the coil wire 2 even with a small layer tolerance of the coil wire in the support part 1, and a relatively narrow recess 4 in the step 3. Even with different diameters of the wire 2 of the coil and / or tension forces different from the wire during the winding action, the disclosed invention allows guiding the wire 2 of the coil directly towards the recess 4 so as to ensure a uniform winding thickness of the wire 2 of the coil. coil through all the winding layers in the area of the step 3. The collar 5 supports the guiding operation and therefore the deviation of the wire 2 from the coil in the direction of the support piece 1 having the outer diameter smaller, because the collar 5 in the area of the recess 4 also has lateral guide inclinations which are aligned equivalently with the offset 7 of the groove. Therefore, it is important for the subject matter of the present invention that a deviation of the wire 2 from the coil continuously in the direction of the recess 4 already occurs at the beginning of the winding action in the largest nominal diameter of the piece 1 of support, in order to achieve coil wires 2 rolled evenly through almost all the winding layers. The uniform guidance of the coil wires 2 and the annular grooves 6 along the alignment plane XY, will be clearly seen in the embodiment of Figure 1. The alignment plane extends at an acute angle relative to the axis of alignment. longitudinal support in the direction of the recess 4. Therefore, all annular grooves 6 have a uniform groove offset 7 which is illustrated graphically by an angle of deviation alpha and which characterizes the deviation (offset) of a radially circumferential groove in the support piece 1, relative to the transverse axis of the support piece 1.

List of Reference Numbers 1 support piece 2 coil wire 3 step 4 recess 5 collar 6 annular groove 7 off-center slot 8 step

Claims (9)

R E I V I N D I C A C I O N S

1. The coil support for accommodating at least one coil wire of an electromagnet, more particularly for use in electromagnetic valves, including a hollow cylinder-shaped support part having ends that are provided with stops defining the coil in its axial position, characterized in that the support part (1) has a step (3) in its diameter which is limited by the coil wire (2) with different winding layers and where the coil wire (2) is guided. ).

2. The coil support according to claim 1, characterized in that in step (3) includes a recess (4) where the wire of the coil (2) is guided.

The coil support according to claim 1 or 2, characterized in that the recess (4) is limited by a radially circumferential collar (5) in the step (3).

A coil support according to claim 1, characterized in that the support part (1) includes a large number of annular grooves (6) placed in parallel side by side.

A coil support according to claim 4, characterized in that a plurality of annular grooves (6) placed side by side include crank portions configured as a groove offset (7), with the result that the wire the coil (2) is laterally deflected.

The coil support according to claim 5, characterized in that each groove offset (7) has an angle of deviation (alpha) identical in size and direction with respect to the offset of the nearest adjacent groove (7).

The coil support according to claim 5, characterized in that the groove offsets (7) are in alignment with each other.

The coil support according to claim 5, characterized in that the recess (4) is placed in an alignment plane (XY) of several groove offsets (7).

9. The coil support according to claim 5, characterized in that the support part (1) in the area of the largest outer diameter includes the annular groove (6) placed with the offset of the groove (7).