CN113572300B - Motor with a motor housing having a motor housing with a motor housing - Google Patents
Motor with a motor housing having a motor housing with a motor housing Download PDFInfo
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- CN113572300B CN113572300B CN202110453795.1A CN202110453795A CN113572300B CN 113572300 B CN113572300 B CN 113572300B CN 202110453795 A CN202110453795 A CN 202110453795A CN 113572300 B CN113572300 B CN 113572300B
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- peripheral surface
- motor
- inner peripheral
- diameter inner
- core wire
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- 239000000463 material Substances 0.000 claims abstract description 126
- 230000002093 peripheral effect Effects 0.000 claims abstract description 102
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 238000000576 coating method Methods 0.000 claims abstract description 30
- 238000003780 insertion Methods 0.000 claims abstract description 19
- 230000037431 insertion Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000000758 substrate Substances 0.000 description 16
- 238000009413 insulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/30—Installations of cables or lines on walls, floors or ceilings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
A motor is provided with a motor main body part, a motor housing for accommodating the motor main body part and a shielding wire led out of the motor housing, and can improve the appearance even if the shielding wire is prevented from being pulled out when a pulling force acts on the shielding wire. In the motor, a shielding material folded-back part (8 c) for folding back a shielding material (37) to the side of a middle core wire coating part is formed at the boundary part of a middle core wire exposing part (8 a) and a middle core wire coating part (8 b) of a shielding wire (8). The insertion hole (43 a) of the bushing (43) mounted to the motor housing is provided with a small-diameter inner peripheral surface portion (43 b) on which the core wire coating portion (8 b) is disposed and a large-diameter inner peripheral surface portion (43 c) on which the shielding material folding-back portion (8 c) is disposed. The shielding material folded-back portion (8 c) is adhesively fixed to the large-diameter inner peripheral surface portion (43 c) in a state of being in contact with a step surface (43 d) formed at a boundary portion between the large-diameter inner peripheral surface portion (43 c) and the small-diameter inner peripheral surface portion (43 b).
Description
Technical Field
The present invention relates to a motor having a shielded wire led out of a motor case.
Background
Conventionally, there is known an electric motor provided with: a motor main body part having a rotor and a stator; and a motor housing accommodating the motor main body (for example, refer to patent document 1). The motor described in patent document 1 is provided with a sensor for detecting: an encoder of the rotational speed or rotational position of the rotor. The encoder is provided with: a magnet for a sensor mounted on the rotor; a magnetic sensor element disposed opposite to the sensor magnet; and a sensor substrate on which the magnetic induction element is mounted. The sensor output line is connected to the sensor substrate. The sensor output line is, for example, a shield line including a core wire, a shield material covering the core wire, and an insulating film covering the shield material.
In the motor described in patent document 1, a motor case includes: a cylindrical housing; a first bearing holder arranged on the opposite output side of the cylindrical housing; and a second bearing holder disposed on the output side of the cylindrical housing. An encoder housing accommodating an encoder is mounted on the opposite output side of the first bearing holder. A notch is formed in the encoder housing, and a gap is formed between the encoder housing and the first bearing holder through the notch. A bushing is sandwiched in the gap. The sensor output line is wound so as to pass through the bush, and the sensor output line passing through the bush is led out to the outside in the radial direction of the motor.
In the motor described in patent document 1, a wiring fixing portion for fixing a sensor output line to the outside of a motor case is formed in the first bearing holder, and the sensor output line that passes through the bushing and is led out to the outside of the encoder housing is fixed to the wiring fixing portion. In the motor described in patent document 1, by fixing the sensor output line to the wiring fixing portion, pulling out of the sensor output line is prevented when a pulling force for pulling out the sensor output line acts on the sensor output line. That is, in the motor described in patent document 1, by fixing the sensor output line to the wiring fixing portion, the connection portion between the sensor output line and the sensor substrate is prevented from being damaged when a tensile force acts on the sensor output line.
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2013-9570
Disclosure of Invention
Technical problem to be solved by the invention
In the motor described in patent document 1, a sensor output line is fixed to a wiring fixing portion disposed outside a motor case, and a fixing portion of the sensor output line appears on the external appearance of the motor. Therefore, in the case of the motor described in patent document 1, the appearance of the motor is deteriorated.
Accordingly, an object of the present invention is to provide a motor including a motor main body having a rotor and a stator, a motor case accommodating the motor main body, and a shielded wire led out toward the outside of the motor case, wherein the motor can improve the appearance even if the shielded wire is prevented from being pulled out when a tensile force acts on the shielded wire.
Technical proposal adopted for solving the technical problems
In order to solve the above problems, a motor according to the present invention includes: a motor main body portion having a rotor and a stator; a motor housing accommodating a motor main body portion; a detection mechanism accommodated in the motor housing; a shielded wire led out from the detection mechanism toward the outside of the motor housing; and a rubber bushing for preventing liquid from penetrating into the motor case, wherein the shield wire includes a center wire, a shield material covering the center wire, and an insulating film covering the shield material, the shield wire includes a center wire exposed portion where the shield material and the insulating film are removed to expose the center wire, and a center wire covered portion where the center wire is covered with the shield material and the insulating film, a shield material folded-back portion is formed at a boundary portion between the center wire exposed portion and the center wire covered portion, the shield material is folded back on an outer peripheral surface of the insulating film on the center wire covered portion side, the center wire exposed portion is disposed in the motor case, the bushing is mounted on the motor case, an insertion hole through which the shield wire is inserted is formed on the bushing, the insertion hole includes a small-diameter inner peripheral surface portion where the center wire covered portion is disposed, the large-diameter inner peripheral surface portion is folded back larger than the small-diameter inner peripheral surface portion, the small-diameter inner peripheral surface portion is disposed on an outer side of the motor case, the large-diameter inner peripheral surface portion is disposed on an inner peripheral surface of the motor case, and the large-diameter inner peripheral surface portion is formed in contact with the shield material, and the large-diameter inner peripheral surface portion is formed on the inner peripheral surface portion.
In the motor of the present invention, a shield material folded portion where the shield material is folded back on the outer peripheral surface of the insulating film on the side of the intermediate core wire coating portion is formed at the boundary portion between the intermediate core wire exposed portion and the intermediate core wire coating portion of the shield wire. In the present invention, the insertion hole of the bushing mounted to the motor case includes a small-diameter inner peripheral surface portion on which the core wire coating portion is disposed and a large-diameter inner peripheral surface portion on which the shielding material folded-back portion is disposed, the small-diameter inner peripheral surface portion being disposed on the outer side of the motor case, and the large-diameter inner peripheral surface portion being disposed on the inner side of the motor case. In the present invention, a step surface is formed at a boundary portion between the large-diameter inner peripheral surface portion and the small-diameter inner peripheral surface portion, and the shield material folded-back portion is bonded and fixed to the large-diameter inner peripheral surface portion.
Therefore, in the present invention, the pull-out of the shield wire can be prevented by the step surface of the bushing mounted to the motor case, the shield material folded-back portion of the shield wire, and the adhesive that adhesively fixes the shield material folded-back portion to the large-diameter inner peripheral surface portion of the bushing. In the present invention, since the small-diameter inner peripheral surface portion is disposed on the outer side of the motor case and the large-diameter inner peripheral surface portion is disposed on the inner side of the motor case, the adhesion portion of the shield material folded-back portion to the large-diameter inner peripheral surface portion does not appear on the external appearance of the motor. Therefore, in the present invention, even if the pull-out of the shield wire when the tension acts on the shield wire can be prevented, the appearance of the motor can be improved. In addition, in the present invention, since the shield material of the shield wire can be used to prevent the pull-out of the shield wire, the structure of the motor can be simplified.
In the present invention, the shield material folded-back portion is disposed on the large-diameter inner peripheral surface portion of the bushing and is bonded and fixed, so that the protrusion amount of the shield material folded-back portion having a large outer diameter into the motor case can be suppressed. Therefore, in the present invention, even if the arrangement space of the shielding material folded-back portion is narrowed or the arrangement space of the shielding material folded-back portion is not provided in the motor case, the shielding material folded-back portion can be arranged. Therefore, in the present invention, the influence of the folded-back portion of the shielding material on the assembly of the motor can be reduced in the motor case, and as a result, the assembly of the motor can be easily performed. In addition, in the present invention, since the influence of the folded-back portion of the shielding material on the constituent parts disposed inside the motor case can be reduced, the degree of freedom in designing the motor can be improved.
In the present invention, it is preferable that, in the shield material folded-back portion, the shield material folded back onto the outer peripheral surface of the insulating film is twisted in the circumferential direction of the core wire coating portion. With this configuration, the outer diameter of the shield material folded portion can be increased as compared with a case where the shield material folded onto the outer peripheral surface of the insulating film is not twisted in the circumferential direction of the core wire coating portion. Therefore, it is possible to increase the difference between the outer diameter of the shield material folded-back portion and the outer diameter of the core wire coating portion, and to enlarge the contact area of the step surface formed in the bushing and the shield material folded-back portion. As a result, the pull-out of the shield wire when the tensile force acts on the shield wire can be effectively prevented.
In the present invention, for example, the insertion hole is constituted by a small-diameter inner peripheral surface portion and a large-diameter inner peripheral surface portion. In this case, the shape of the insertion hole can be simplified. In the present invention, for example, the core wire coating portion is pressed into the small diameter inner peripheral surface portion.
In the present invention, it is preferable that the shielding material folded-back portion is covered with an adhesive that adhesively fixes the shielding material folded-back portion to the large-diameter inner peripheral portion. With this configuration, the shielding material folded back on the outer peripheral surface of the insulating film can be covered with the adhesive, and therefore, the insulation properties of the shielding material folded back on the outer peripheral surface of the insulating film can be ensured by using the adhesive.
In the present invention, it is preferable that, in the shielding material folded-back portion, the front end of the shielding material folded back onto the outer peripheral surface of the insulating film is directed to the outside of the motor case. That is, it is preferable that, in the shield material folded-back portion, the tip end of the shield material folded back onto the outer peripheral surface of the insulating film is not directed toward the side of the core wire exposed portion. With this configuration, contact between the tip of the shielding material and the core wire can be prevented. Therefore, the insulation properties of the shield material and the intermediate core wire are easily ensured.
Effects of the invention
As described above, the present invention provides a motor including a motor main body having a rotor and a stator, a motor case accommodating the motor main body, and a shielded wire drawn out toward the outside of the motor case, wherein the motor can be improved in appearance even if the shielded wire is prevented from being pulled out when a tensile force acts on the shielded wire.
Drawings
Fig. 1 is a perspective view of an electric motor according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of the motor shown in fig. 1.
Fig. 3 is a view for explaining the structure of the shield wire and the bushing shown in fig. 2.
Fig. 4 is a perspective view of the shield wire, the cover, and the like shown in fig. 1.
Fig. 5 is an exploded perspective view of the cover, bushing, and liner cover shown in fig. 4.
Fig. 6 is an exploded perspective view showing the cover, the bushing, and the bushing cover shown in fig. 5 from different directions.
Description of the reference numerals
A 1 … motor; 2 … rotor; 3 … stator; 4 … motor body; 5 … motor housing; 6 … detection mechanism; 8 … shielded wires; 8a …;8b …;8c … shielding material return; 36 …;37 … shielding material; 38 … insulating film; 39 … adhesive; 43 … bushing; 43a … insertion holes; 43b … small diameter inner peripheral surface portion; 43c … large diameter inner peripheral surface portion; 43d … step surfaces.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
(integral Structure of Motor)
Fig. 1 is a perspective view of a motor 1 according to an embodiment of the present invention. Fig. 2 is a sectional view of the motor 1 shown in fig. 1.
The motor 1 of the present embodiment is an inner rotor type motor. The motor 1 includes: a motor main body 4 having a rotor 2 and a stator 3; a motor housing 5 accommodating the motor main body 4; and a detection mechanism 6 for detecting the rotational speed and rotational position of the rotor 2. The motor 1 further includes a power supply line 7 for supplying power to the motor body 4 and a shielded wire 8 connected to the detection mechanism 6.
The rotor 2 includes a rotary shaft 11 and a driving magnet 12 fixed to the rotary shaft 11. The output-side end of the rotary shaft 11 protrudes outside the motor housing 5. The stator 3 is disposed on the outer peripheral side of the driving magnet 12. The stator 3 includes a stator core 13 and a driving coil 15 wound around a salient pole of the stator core 13 via an insulator 14. The end of the driving coil 15 is wound around and fixed to a terminal pin fixed to the insulator 14, and a substrate 16 is soldered to the terminal pin. One end of the power supply line 7 is soldered to the substrate 16.
In the following description, the axial direction of the rotary shaft 11 (i.e., the axial direction of the rotor 2, the X direction in fig. 1, etc.) is referred to as the "front-rear direction", and the Z direction in fig. 1, etc. orthogonal to the front-rear direction is referred to as the "up-down direction". The output side (X1 direction side in fig. 1 and the like) of the rotary shaft 11 in the front-rear direction (axial direction of the rotary shaft 11) is referred to as the "front" side, the opposite output side (X2 direction side in fig. 1 and the like) of the rotary shaft 11 in the front-rear direction is referred to as the "rear (back)" side, the Z1 direction side in fig. 1 and the like, which is the one side in the up-down direction, is referred to as the "upper" side, and the other side in the up-down direction, which is the Z2 direction side in fig. 1 and the like, is referred to as the "lower" side.
The detection mechanism 6 is a magnetic rotary encoder. The detection mechanism 6 includes a detection magnet 20 and a flat plate-shaped substrate 21 disposed on the back side of the detection magnet 20. The substrate 21 is arranged such that the thickness direction of the substrate 21 coincides with the front-rear direction. A magnetoresistive element and a hall element are mounted on the front surface of the substrate 21. The detection magnet 20 is fixed to a magnet holder 22. The magnet holder 22 is fixed to the rear end portion of the rotary shaft 11. The substrate 21 is fixed to a substrate holder 23. The substrate holder 23 is fixed to a bearing holder 27, which will be described later, constituting the motor housing 5.
The motor housing 5 includes: a cylindrical case body 2 that is open in the front-rear direction; a bearing holder 26 fixed to the front end of the housing main body 25; a bearing holder 27 fixed to the rear end of the housing main body 25; a cover 28 covering the connection portion of the power supply line 7 and the substrate 16; and a cover 29 covering the detection mechanism 6. A bearing 30 for rotatably supporting the rotary shaft 11 is attached to the bearing holder 26. A bearing 31 rotatably supporting the rotary shaft 11 is attached to the bearing holder 27.
The cover 28 is fixed to the upper surface of the housing main body 25. A rubber bushing 32 for preventing liquid such as water from penetrating into the motor case 5 is mounted between the cover 28 and the case main body 25. The bushing 32 has an insertion hole 32a through which the power supply line 7 is inserted. The power supply line 7 is led out of the motor housing 5 from the insertion hole 32a.
The cover 29 is fixed to the rear surface of the bearing holder 27. As described above, the cover 29 covers the detection mechanism 6, and the detection mechanism 6 is accommodated in the motor housing 5. As described above, the shielded wire 8 is connected to the detection mechanism 6. Specifically, one end of the shield wire 8 is connected to the substrate 21 via the connector 33. The shielded wire 8 is led out from the detection mechanism 6 toward the outside of the motor housing 5. Specifically, the shielded wire 8 is led out toward the outside of the cover 29. The structure of the shielded wire 8 and the structure of the lead-out portion of the shielded wire 8 will be described below.
(Structure of shielded wire and Structure of lead-out portion of shielded wire)
Fig. 3 is a view for explaining the structure of the shield wire 8 and the bushing 43 shown in fig. 2. Fig. 4 is a perspective view of the shield wire 8 and the cover 29 shown in fig. 1. Fig. 5 is an exploded perspective view of the cover 29, the bush 43, and the bush cover 44 shown in fig. 4. Fig. 6 is an exploded perspective view showing the cover 29, the bush 43, and the bush cover 44 shown in fig. 5 from different directions.
The shield wire 8 includes a core wire 36, a shield material 37 covering the core wire 36, and an insulating film 38 covering the shield material 37 (see fig. 3). The shield wire 8 of the present embodiment includes a plurality of intermediate cores 36, and the shield material 37 covers the plurality of intermediate cores 36. The intermediate core wire 36 is constituted by a core wire (conductor wire) constituted by a copper wire or the like, and an insulating coating film covering the core wire. The shielding material 37 is made of copper wire braided into a net shape, or the like. The shield wire 8 has: a core wire exposing portion 8a from which the core wire 36 is exposed by removing the shielding material 37 and the insulating film 38; and a core wire coating portion 8b in which the core wire 36 is covered with a shielding material 37 and an insulating film 38. Specifically, both end portions of the shielded wire 8 are core wire exposed portions 8a, and a portion of the shielded wire 8 from which the core wire exposed portions 8a are removed is a core wire covered portion 8b.
A shield material folded-back portion 8c is formed at a boundary portion between the core wire exposed portion 8a and the core wire covered portion 8b of one end side of the shield wire 8 (specifically, the side of the shield wire 8 connected to the substrate 21), and the shield material 37 is folded back on the outer peripheral surface of the insulating film 38 on the core wire covered portion 8b side (see fig. 3). In the shield material folded-back portion 8c, the shield material 37, from which the insulating film 38 is removed and exposed to the outside, is folded back once toward the side of the intermediate core wire coating portion 8b, and the tip end of the shield material 37 folded back on the outer peripheral surface of the insulating film 38 is directed toward the side of the intermediate core wire coating portion 8b. In the shield material folded-back portion 8c, the shield material 37 folded back onto the outer peripheral surface of the insulating film 38 is twisted in the circumferential direction of the core wire coating portion 8b. The outer diameter of the shielding material folded-back portion 8c is larger than the outer diameter of the core wire coating portion 8b.
As described above, the shielded wire 8 is led out toward the outside of the cover 29. The cover 29 is formed of resin. The cover 29 is formed in a substantially square tubular shape with a bottom at the rear end. The cover 29 includes an upper wall portion 29a that forms an upper surface of the cover 29. A rubber bushing 43 for preventing liquid from penetrating into the motor case 5 is attached to the cover 29. That is, the motor 1 includes a rubber bushing 43 for preventing the penetration of liquid into the motor housing 5, and the bushing 43 is attached to the motor housing 5.
A bush holding portion 29b that holds the bush 43 is formed in the cover 29. The bush holding portion 29b is formed in the upper wall portion 29a. That is, the bush 43 is attached to a side wall portion of the motor case 5 (specifically, an upper side wall portion of the cover 29). The bush holding portion 29b is formed with a notch 29c in which the bush 43 is disposed. The notch 29c is cut into a U shape from the front end of the upper wall 29a toward the back side. The bush holding portion 29b is formed with a support wall portion 29d for supporting the bush 43 from below. The support wall 29d is disposed below the notch 29c.
A U-shaped notch 29e is formed in the support wall 29d. The notch 29e is cut out from the front end of the upper wall 29a toward the back side. The outer shape of the notch 29e is smaller than the outer shape of the notch 29c, and as shown in fig. 6, the upper surface of the support wall 29d is a plane orthogonal to the vertical direction. As shown in fig. 5, the lower surface of the support wall 29d is also a plane orthogonal to the vertical direction.
A shielding member is formed on the bushing 43 the insertion hole 43a through which the wire 8 is inserted. The insertion hole 43a penetrates the bushing 43 in the up-down direction. The insertion hole 43a includes a small-diameter inner peripheral surface portion 43b and a large-diameter inner peripheral surface portion 43c, the small-diameter inner peripheral surface portion 43b is provided with the core wire coating portion 8b, the large-diameter inner peripheral surface portion 43c is provided with the shielding material folded-back portion 8c, and an inner diameter is larger than an inner diameter of the small-diameter inner peripheral surface portion 43b. The insertion hole 43a of the present embodiment is constituted by a small-diameter inner peripheral surface portion 43b and a large-diameter inner peripheral surface portion 43c.
The small diameter inner peripheral surface portion 43b is disposed above the large diameter inner peripheral surface portion 43c. That is, the small-diameter inner peripheral surface portion 43b of the bush 43 held by the bush holding portion 29b formed on the upper wall portion 29a is disposed on the outer side of the motor housing 5 (specifically, the outer side of the cover 29), and the large-diameter inner peripheral surface portion 43c is disposed on the inner side of the motor housing 5 (specifically, the inner side of the cover 29). A stepped surface 43d is formed at a boundary portion between the small diameter inner peripheral surface portion 43b and the large diameter inner peripheral surface portion 43c. The step surface 43d is an annular flat surface orthogonal to the vertical direction. The step surface 43d is a plane facing downward.
A liner cover 44 is fixed to the upper surface of the upper wall portion 29a. The bush 43 is held by the bush holding portion 29b in a state of being sandwiched between the support wall portion 29d and the bush housing 44. The front surface of the bush 43 and the front surface of the cover 29 are disposed at the same position in the front-rear direction. The bush housing 44 is formed with an insertion hole 44a penetrating the bush housing 44 in the up-down direction.
The core wire exposed portion 8a constituting one end portion of the shielded wire 8 (specifically, the end portion of the shielded wire 8 on the side connected to the substrate 21) is disposed inside the cover 29. That is, the core wire exposed portion 8a is disposed inside the motor case 5. The shielded wire 8 is led out of the cover 29 from the insertion hole 43a of the bushing 43 and the insertion hole 44a of the bushing cover 44. The shielding material folded-back portion 8c is disposed on the large-diameter inner peripheral surface portion 43c of the bushing 43. In the present embodiment, the entirety of the shielding material folded-back portion 8c is disposed on the large-diameter inner peripheral surface portion 43c. A part of the core wire exposed portion 8a is disposed in the notch 29e. A part of the core wire coating portion 8b is disposed on the small diameter inner peripheral surface portion 43b of the bushing 43. The core wire coating portion 8b is pressed into the small diameter inner peripheral surface portion 43b.
The shielding material folded-back portion 8c is in contact with the step surface 43d. The shielding material folded-back portion 8c is adhesively fixed to the large-diameter inner peripheral surface portion 43c. That is, the shield material folded-back portion 8c is adhesively fixed to the large-diameter inner peripheral surface portion 43c in contact with the step surface 43d. Specifically, the shield material folded-back portion 8c is adhesively fixed to the large-diameter inner peripheral surface portion 43c in a state where the upper end of the shield material folded-back portion 8c is in contact with the step surface 43d. As shown in fig. 3, the shielding material folded-back portion 8c is covered with an adhesive 39 that adhesively fixes the shielding material folded-back portion 8c to the large-diameter inner peripheral surface portion 43c. The adhesive 39 covers the entirety of the shielding material folded-back portion 8c. The adhesive 39 is filled in the large-diameter inner peripheral surface portion 43c.
As described above, in the shielding material folded-back portion 8c, since the front end of the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 is directed toward the side of the core wire coating portion 8b, the front end of the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 is directed upward. That is, the tip of the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 faces the outer side of the motor housing 5 (specifically, the outer side of the cover 29).
(main effects of the present embodiment)
As described above, in the present embodiment, the shield material folded-back portion 8c is formed at the boundary portion between the intermediate core wire exposed portion 8a and the intermediate core wire covered portion 8b of the shield wire 8. In the present embodiment, the shielding material folded-back portion 8c disposed on the large-diameter inner peripheral surface portion 43c of the bush 43 is bonded and fixed to the large-diameter inner peripheral surface portion 43c by the adhesive 39 in a state of being in contact with the step surface 43d of the bush 43. Therefore, in the present embodiment, the shield wire 8 can be prevented from being pulled out when a tensile force acts on the shield wire 8 by the step surface 43d, the shield material folded-back portion 8c, and the adhesive 39.
In the present embodiment, the small-diameter inner peripheral surface portion 43b is disposed on the outer side of the motor case 5, and the large-diameter inner peripheral surface portion 43c is disposed on the inner side of the motor case 5, so that the adhesion portion of the shielding material folded-back portion 8c to the large-diameter inner peripheral surface portion 43c does not appear on the external appearance of the motor 1. Therefore, in the present embodiment, even if the pull-out of the shielded wire 8 when a tensile force acts on the shielded wire 8 can be prevented, the appearance of the motor 1 can be improved. In addition, in the present embodiment, since the shield material 37 of the shield wire 8 can be used to prevent the shield wire 8 from being pulled out, the structure of the motor 1 can be simplified. In addition, in the present embodiment, since it is not necessary to form a wiring fixing portion in the bearing holder 27 as in the motor described in patent document 1, the structure of the bearing holder 27 can be simplified.
In the present embodiment, since the shield folded-back portion 8c is disposed on the large-diameter inner peripheral surface portion 43c of the bush 43 and is bonded and fixed, the protrusion amount of the shield folded-back portion 8c having a large outer diameter into the motor case 5 can be suppressed. In particular, in the present embodiment, since the entirety of the shield material folded-back portion 8c is disposed on the large-diameter inner peripheral surface portion 43c, the shield material folded-back portion 8c does not protrude into the motor case 5.
Therefore, in the present embodiment, the shielding material folded-back portion 8c can be disposed in the motor case 5 without providing a space for disposing the shielding material folded-back portion 8c. Therefore, in the present embodiment, the influence of the shielding material folded-back portion 8c on the assembly of the motor 1 can be reduced in the motor case 5, and as a result, the assembly of the motor 1 can be easily performed. In addition, in the present embodiment, since the influence of the shielding material folded-back portion 8c on the constituent parts disposed inside the motor case 5 can be reduced, the degree of freedom in design of the motor 1 can be improved.
In the present embodiment, in the shield material folded-back portion 8c, the shield material 37 folded back onto the outer peripheral surface of the insulating film 38 is twisted in the circumferential direction of the center core wire coating portion 8b. Therefore, in the present embodiment, the outer diameter of the shielding material folded-back portion 8c can be increased compared to a case where the shielding material 37 folded-back onto the outer peripheral surface of the insulating film 38 is not twisted in the circumferential direction of the core wire coating portion 8b. Therefore, in the present embodiment, the difference between the outer diameter of the shield material folded-back portion 8c and the outer diameter of the core wire coating portion 8b can be increased, and the contact area between the step surface 43d of the bushing 43 and the shield material folded-back portion 8c can be enlarged. As a result, in the present embodiment, the pull-out of the shielded wire 8 when the tensile force acts on the shielded wire 8 can be effectively prevented.
In the present embodiment, the shielding material folded-back portion 8c is covered with the adhesive 39. That is, in the present embodiment, the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 is covered with the adhesive 39. Therefore, in the present embodiment, the insulation properties of the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 can be ensured using the adhesive 39.
In the present embodiment, in the shield material folded-back portion 8c, the tip end of the shield material 37 folded back onto the outer peripheral surface of the insulating film 38 is directed toward the side of the core wire coating portion 8b, not toward the side of the core wire exposed portion 8 a. Therefore, in the present embodiment, the tip of the shielding material 37 can be prevented from contacting the core wire 36. Therefore, in the present embodiment, the insulation between the shield material 37 and the intermediate core wire 36 is easily ensured.
In the present embodiment, the shielding material folded-back portion 8c disposed on the large-diameter inner peripheral surface portion 43c of the bush 43 is adhesively fixed to the large-diameter inner peripheral surface portion 43c. Therefore, in the present embodiment, the shield wire 8 can be prevented from rotating with respect to the bushing 43.
(other embodiments)
The above-described embodiments are examples of preferred embodiments of the present invention, but the present invention is not limited thereto, and various modifications can be made without changing the gist of the present invention.
In the above embodiment, a part of the shielding material folded-back portion 8c may protrude from the large-diameter inner peripheral surface portion 43c toward the inside of the cover 29. Even in this case, the shielding material folded-back portion 8c can be disposed inside the motor case 5 even if the disposition space of the shielding material folded-back portion 8c is narrowed. Therefore, substantially the same effects as those of the above-described embodiment can be obtained.
In the above-described embodiment, in the shield material folded-back portion 8c, the shield material 37 from which the insulating film 38 is removed and which is exposed outside is folded back once toward the side of the center wire covering portion 8b, but in the shield material folded-back portion 8c, the shield material 37 from which the insulating film 38 is removed and which is exposed outside may be folded back a plurality of times. In this case, the tip of the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 may face the side of the core wire exposed portion 8 a. In addition, in the shield material folded-back portion 8c, the shield material 37 folded back onto the outer peripheral surface of the insulating film 38 may not be twisted in the circumferential direction of the core wire coating portion 8b.
In the above embodiment, the core wire coating portion 8b may not be pressed into the small-diameter inner peripheral surface portion 43b. In the above embodiment, the detection means 6 may be a detection means other than a rotary encoder. In the above embodiment, the motor 1 is an inner rotor type motor, but the motor to which the structure of the present invention is applied may be an outer rotor type motor.
Claims (6)
1. An electric motor, comprising:
a motor main body portion having a rotor and a stator;
a motor housing accommodating the motor main body;
a detection mechanism accommodated in the motor housing;
a shield wire led out from the detection mechanism toward the outside of the motor housing; and
a rubber bushing for preventing liquid from penetrating into the motor housing,
the shield wire is provided with: a central core wire; a shielding material covering the center wire; an insulating film covering the shielding material,
the shield wire has formed therein: a core wire exposing portion where the shielding material and the insulating film are removed to expose the core wire; and a core wire coating portion in which the core wire is covered with the shielding material and the insulating film,
a shield material folded-back portion is formed at a boundary portion between the core wire exposed portion and the core wire covered portion, the shield material of the shield material folded-back portion is folded back onto an outer peripheral surface of the insulating film on the core wire covered portion side,
the core wire exposing portion is disposed inside the motor housing,
the bushing is mounted to the motor housing,
an insertion hole through which the shield wire is inserted is formed in the bushing,
the insertion hole has a small-diameter inner peripheral surface portion on which the core wire coating portion is disposed, and a large-diameter inner peripheral surface portion on which the shielding material folded-back portion is disposed, the inner diameter being larger than the small-diameter inner peripheral surface portion,
the small diameter inner peripheral surface portion is disposed on the outer side of the motor housing, and the large diameter inner peripheral surface portion is disposed on the inner side of the motor housing,
a step surface for the shielding material folded-back portion to contact is formed at a boundary portion between the large diameter inner peripheral surface portion and the small diameter inner peripheral surface portion,
the shielding material folded-back portion is adhesively fixed to the large-diameter inner peripheral surface portion.
2. The motor of claim 1, wherein the motor is configured to control the motor to drive the motor,
in the shield material folded-back portion, the shield material folded back onto the outer peripheral surface of the insulating film is twisted in the circumferential direction of the core wire coating portion.
3. An electric motor according to claim 1 or 2, characterized in that,
the insertion hole is formed by the small-diameter inner peripheral surface portion and the large-diameter inner peripheral surface portion.
4. An electric motor according to any one of claims 1 to 3, characterized in that,
the core wire coating portion is pressed into the small-diameter inner peripheral portion.
5. The motor according to any one of claims 1 to 4, wherein,
the shield material folded-back portion is covered with an adhesive that adhesively fixes the shield material folded-back portion to the large-diameter inner peripheral surface portion.
6. The motor according to any one of claims 1 to 5, wherein,
in the shielding material folded-back portion, a front end of the shielding material folded back on an outer peripheral surface of the insulating film faces an outside of the motor case.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020079032A JP7385524B2 (en) | 2020-04-28 | 2020-04-28 | motor |
| JP2020-079032 | 2020-04-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113572300A CN113572300A (en) | 2021-10-29 |
| CN113572300B true CN113572300B (en) | 2023-07-07 |
Family
ID=78161366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110453795.1A Active CN113572300B (en) | 2020-04-28 | 2021-04-26 | Motor with a motor housing having a motor housing with a motor housing |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7385524B2 (en) |
| CN (1) | CN113572300B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003274597A (en) * | 2002-03-13 | 2003-09-26 | Yaskawa Electric Corp | Detector cable outlet structure of electric motor |
| JP2012125009A (en) * | 2010-12-07 | 2012-06-28 | Sumitomo Wiring Syst Ltd | Shield cable |
| CN102857019A (en) * | 2011-06-27 | 2013-01-02 | 日本电产三协株式会社 | Electric motor |
| JP2015149176A (en) * | 2014-02-06 | 2015-08-20 | 株式会社オートネットワーク技術研究所 | Electromagnetic shielding component, and electromagnetic shielding component-equipped electric wire |
| CN108028499A (en) * | 2015-09-14 | 2018-05-11 | 株式会社自动网络技术研究所 | Shielded connector |
| CN108352219A (en) * | 2015-08-31 | 2018-07-31 | 住友电装株式会社 | Screening conductive path |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001313100A (en) | 1999-04-15 | 2001-11-09 | Auto Network Gijutsu Kenkyusho:Kk | Shield connector |
| JP3362842B2 (en) | 1999-05-27 | 2003-01-07 | 住友電装株式会社 | Shield connector |
| JP2002101605A (en) | 2000-09-20 | 2002-04-05 | Yaskawa Electric Corp | Lead cable structure of motor |
-
2020
- 2020-04-28 JP JP2020079032A patent/JP7385524B2/en active Active
-
2021
- 2021-04-26 CN CN202110453795.1A patent/CN113572300B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003274597A (en) * | 2002-03-13 | 2003-09-26 | Yaskawa Electric Corp | Detector cable outlet structure of electric motor |
| JP2012125009A (en) * | 2010-12-07 | 2012-06-28 | Sumitomo Wiring Syst Ltd | Shield cable |
| CN102857019A (en) * | 2011-06-27 | 2013-01-02 | 日本电产三协株式会社 | Electric motor |
| JP2013009570A (en) * | 2011-06-27 | 2013-01-10 | Nidec Sankyo Corp | Motor |
| JP2015149176A (en) * | 2014-02-06 | 2015-08-20 | 株式会社オートネットワーク技術研究所 | Electromagnetic shielding component, and electromagnetic shielding component-equipped electric wire |
| CN108352219A (en) * | 2015-08-31 | 2018-07-31 | 住友电装株式会社 | Screening conductive path |
| CN108028499A (en) * | 2015-09-14 | 2018-05-11 | 株式会社自动网络技术研究所 | Shielded connector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021175312A (en) | 2021-11-01 |
| CN113572300A (en) | 2021-10-29 |
| JP7385524B2 (en) | 2023-11-22 |
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