Fixing jig

Abstract

To provide a fixing jig capable of preventing interference between a lead and a deformed blade.SOLUTION: A disclosed fixing jig 500 includes a coil 200 that is inserted into a slot provided in the core 400 with a lead portion 100 that protrudes from the end face 410 of the core 400. The coil 200 is deformed by a deforming blade 300 inserted between the coils 200. The lead portion 100 has a chamfered portion 110 that has an R shape 120 at the tip thereof.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a stator. [Background technology]

[0002] A stator is known in which deformation blades are inserted between coils to deform the stator. For example, Patent Document 1 discloses a stator in which deformed blades are inserted from the lead portion at the tip of the coil. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-121296 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors have found the following problems with the stator. To make it easier to insert the deformed blade, the lead portion of the coil is sometimes chamfered. However, the stress from the deformed blade increases at the boundary between the chamfered portion and other portions, which can cause interference between the lead portion and the deformed blade.

[0005] The present disclosure has been made in consideration of such problems, and aims to provide a stator that suppresses interference between the lead portions and the deformed blades. [Means for solving the problem]

[0006] One aspect of the present invention to achieve the above object is to A stator including a coil inserted into a slot formed in a stator core and having lead portions protruding from an end face of the stator core, The coils are deformed by a deforming blade inserted between the coils; The lead portion has a rounded chamfer at the tip. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a stator that suppresses interference between the lead portion and the deformed blade. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a schematic diagram illustrating a configuration of a stator according to an embodiment. [Figure 2] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are designated by the same reference numerals, and for clarity of explanation, duplicate explanations will be omitted as necessary. In addition, for ease of understanding, the scale of each part in the drawings may differ from the actual scale.

[0010] FIG. 1 is a schematic diagram showing an example configuration of a stator 500 according to an embodiment. The stator 500 includes a coil 200, a deforming blade 300, and a stator core 400. The stator 500 is suitable for automobile drive motors. The coil 200 is a U-shaped segment coil, and multiple coils 200 are inserted into slots provided in the stator core 400. The deforming blade 300 is a member inserted between the coils 200 and deforms the coils 200. For detailed configuration of the stator 500, reference may be made to Japanese Patent Application Laid-Open No. 2013-121296.

[0011] The tip of the deformed blade 300, where it is inserted between the coils 200, is rounded, i.e., the corners are machined to be rounded and smooth. Because the deformed blade 300 is a component inserted between the coils 200, it is thin. Therefore, the R of the tip of the deformed blade 300 is, for example, about 0.3, and has a shape similar to an edge. Because the tip of the deformed blade 300 has a shape similar to an edge, it is likely to strongly interfere with the coils 200 when inserted between the coils 200, and there is a risk of scraping off the coils 200. Therefore, in the stator 500 according to the present disclosure, the coils 200 are provided with an R shape, thereby suppressing interference between the coils 200 and the deformed blade 300.

[0012] A lead portion 100 is provided at the tip portion of the coil 200. The lead portion 100 is provided by peeling off a portion of the coil 200. As shown in FIG. 1, the lead portion 100 protrudes from an end surface 410 of the stator core 400. In the example shown in FIG. 1, the entire lead portion 100 protrudes from the end surface 410. However, the lead portion 100 may protrude only partially from the end surface 410.

[0013] 2 is an enlarged schematic diagram of the lead portion 100. As shown in FIG. 2, the tip of the lead portion 100 is provided with a chamfered portion 110. By providing the chamfered portion 110, the lead portion 100 has a shape that tapers toward the tip. This makes it easier to guide the deformed blade 300 between the coils 200.

[0014] The chamfered portion 110 is formed with an R-shape 120. Specifically, the R-shape 120 is provided at the base of the chamfered portion 110, i.e., at the boundary between the chamfered portion 110 and the other portion of the lead portion 100. If the R-shape 120 is not provided at the base of the chamfered portion 110, burrs or edges are likely to occur at the boundary between the chamfered portion 110 and the other portion of the lead portion 100. Therefore, when the deformed blade 300 is inserted, the stress acting on the boundary increases, and there is a risk that the coil 200 may be easily scraped off due to interference between the boundary and the deformed blade 300.

[0015] The method for providing R-shape 120 is not particularly limited, and for example, chamfered portion 110 and the R-shape may be formed simultaneously by punching coil 200 using a cutting tool with an R. Furthermore, from the perspective of sufficiently dispersing stress, R-shape 120 preferably has a larger R than the tip of deformed blade 300. For example, if the R of the tip of deformed blade 300 is 0.3, R-shape 120 may be formed with an R of 1.0.

[0016] After the chamfered portion 110 and the R-shape 120 are formed, the coil 200 is deformed by the deforming blade 300. Specifically, as shown in Fig. 1, the deforming blade 300 is inserted for every two coils, so that two adjacent coils 200 abut against each other and are deformed to be spaced apart from each other. The stator 500 according to the present disclosure is formed by welding the abutting portions of the deformed coils 200.

[0017] Because R-shape 120 is formed at the base of lead portion 100, interference between lead portion 100 and deforming blade 300 when deforming blade 300 is inserted is suppressed, and the stress that lead portion 100 receives from deforming blade 300 is dispersed. This suppresses the amount of scraping of coil 200 by deforming blade 300, making it possible to reduce the amount of foreign matter generated near coil 200 when deforming blade 300 is inserted.

[0018] According to the invention according to the embodiment described above, it is possible to provide a stator that suppresses interference between the lead portion and the deformed blade.

[0019] The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the present disclosure. [Explanation of symbols]

[0020] 100 Lead part 110 Chamfered part 120 R shape 200 coils 300 Deformed Blade 400 stator core 410 End face 500 stator

Claims

[Claim 1] A stator including a coil inserted into a slot formed in a stator core and having lead portions protruding from an end face of the stator core, The coils are deformed by a deforming blade inserted between the coils; The lead portion has a chamfered portion at the tip end that is rounded. stator.

Images