CN113572301B - 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
- Publication number
- CN113572301B CN113572301B CN202110466717.5A CN202110466717A CN113572301B CN 113572301 B CN113572301 B CN 113572301B CN 202110466717 A CN202110466717 A CN 202110466717A CN 113572301 B CN113572301 B CN 113572301B
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- Prior art keywords
- motor
- core wire
- shield
- wire
- fixing portion
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- 239000000463 material Substances 0.000 claims abstract description 149
- 239000011248 coating agent Substances 0.000 claims abstract description 63
- 238000000576 coating method Methods 0.000 claims abstract description 63
- 230000002093 peripheral effect Effects 0.000 claims abstract description 38
- 238000003780 insertion Methods 0.000 claims description 20
- 230000037431 insertion Effects 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 16
- 238000009413 insulation Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- 241001247986 Calotropis procera Species 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
A motor is provided with a motor body part having a rotor and a stator, a motor housing accommodating the motor body part, and a shield wire led out to the outside of the motor housing, and can improve the appearance even if the shield wire is prevented from being pulled out when a tensile force acts on the shield wire. In the motor, a shield wire (8) is provided with a middle core wire exposing part (8 a) where a shield material (37) and an insulating coating film (38) are removed to expose a middle core wire (36), and a middle core wire coating part (8 b) where the middle core wire (36) is covered by the shield material (37) and the insulating coating film (38), and a shield material fixing part (8 c) where the shield material (37) is folded back and fixed on the outer peripheral surface of the insulating coating film (38) on the side of the middle core wire coating part (8 b) is formed at the boundary part of the middle core wire exposing part (8 a) and the middle core wire coating part (8 b). The motor housing is formed with a restricting portion (29 d) that restricts movement of the shielding material fixing portion (8 c) to the outside of the motor housing.
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 includes an encoder for detecting a rotational speed and a rotational position of a 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 led out to the outside of the encoder housing through a bush 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 may be 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, the present invention provides a motor comprising: 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; and a shield wire that is led out from the detection mechanism toward the outside of the motor case, the shield wire including a center wire, a shield material covering the center wire, and an insulating film covering the shield material, wherein the shield wire is formed with a center wire covering portion in which the shield material and the insulating film are removed so that the center wire is exposed to the center wire exposed portion and the center wire covered by the shield material and the insulating film, wherein a shield material fixing portion is formed at a boundary portion between the center wire exposed portion and the center wire covering portion, the shield material is folded and fixed to an outer peripheral surface of the insulating film on the center wire covering portion side, the center wire exposed portion and the shield material fixing portion are disposed inside the motor case, and a restricting portion that restricts movement of the shield material fixing portion to the outside of the motor case is formed or mounted on the motor case.
In the motor of the present invention, a shield material fixing portion is formed at a boundary portion between the middle core wire exposed portion and the middle core wire covered portion of the shield wire, and a shield material of the shield material fixing portion is folded back and fixed to an outer peripheral surface of the insulating film on the side of the middle core wire covered portion, and an outer diameter of the shield material fixing portion is larger than an outer diameter of the middle core wire covered portion. In the present invention, the restricting portion that restricts the movement of the shielding material fixing portion disposed inside the motor housing to the outside of the motor housing is formed or attached to the motor housing. Therefore, in the present invention, the pull-out of the shield wire when the tensile force acts on the shield wire can be prevented by the shield material fixing portion and the restricting portion.
In the present invention, since the shield material fixing portion is disposed inside the motor case, the shield material fixing portion having an outer diameter larger than that of the core wire coating 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, it is preferable that, in the shield material fixing 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 fixing portion can be increased as compared with a case where the shield material folded back onto the outer peripheral surface of the insulating film is not twisted in the circumferential direction of the core wire coating portion. Therefore, the pull-out of the shield wire when the tensile force acts on the shield wire can be effectively prevented.
In the present invention, it is preferable that the shielding material folded back on the outer peripheral surface of the insulating film is fixed by an adhesive in the shielding material fixing portion. With this structure, the shield material folded back on the outer peripheral surface of the insulating film can be fixed relatively easily. In addition, if the structure is such, the shielding material folded back on the outer peripheral surface of the insulating film can be covered with the adhesive, and therefore, the insulation property 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 the shield wire includes a covering member covering at least the shield material fixing portion, and the covering member is a heat-shrinkable tube which is heat-shrinkable. With this configuration, the outer diameter of the portion where the shield material fixing portion is formed can be increased by the covering member covering the shield material fixing portion. Therefore, the pull-out of the shield wire when the tensile force acts on the shield wire can be effectively prevented. Further, if the structure is such, the insulation properties of the shielding material folded back on the outer peripheral surface of the insulating film can be ensured by the covering member covering the shielding material fixing portion.
In the present invention, it is preferable that the motor includes a rubber bushing for preventing liquid from penetrating into the motor case, the bushing is attached to the motor case, an insertion hole through which the core wire coating portion is inserted is formed in the bushing, the coating member further covers a part of the core wire coating portion on the side of the core wire exposed portion, and a part of the core wire coating portion covered by the coating member is press-fitted into the insertion hole. With this configuration, the pressing of the shield wire can be suppressed by the portion of the core wire coating portion covered by the coating member and the rubber bushing when the pressing force pressing the shield wire into the motor case acts on the shield wire.
In the present invention, it is preferable that the covering member further covers a part of the core wire covering side of the core wire exposed portion. With this configuration, the insulation between the shield and the core wire can be ensured by the covering member covering a part of the core wire covering side of the core wire exposed portion. In addition, with such a configuration, the cover member covering the shield material fixing portion can be prevented from falling off from the shield material fixing portion.
In the present invention, the motor case preferably includes a resin restricting portion forming member having a restricting portion formed therein. With this configuration, for example, the movement of the shield material fixing portion to the outside of the motor case can be reliably restricted as compared with the case where the movement of the shield material fixing portion to the outside of the motor case is restricted by using the rubber bush.
In the present invention, it is preferable that the motor includes a rubber bushing for preventing the penetration of the liquid into the motor case, an insertion hole through which the core wire coating portion is inserted is formed in the bushing, a bushing holding portion for holding the bushing is formed in the restriction portion forming member, and the restriction portion forms a part of the bushing holding portion. With this configuration, the restriction portion forms a part of the bushing holding portion, and therefore the structure of the restriction portion forming member can be simplified.
In the present invention, it is preferable that, in the shield material fixing portion, the tip of the shield material folded back onto the outer peripheral surface of the insulating film is directed to the outside of the motor case. That is, in the shield material fixing portion, the tip of the shield material folded back onto the outer peripheral surface of the insulating film is preferably 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 shielded wire shown in fig. 1.
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 fixing portions; 29 … cover (restriction portion forming member); 29b … liner retaining portion; 29d … support wall portions (regulating portions); 36 …;37 … shielding material; 38 … insulating film; 39 … adhesive; 40 … clad member; 43 … bushing; 43a ….
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", the Y direction in fig. 1, etc. orthogonal to the front-rear direction is referred to as the "left-right direction", and the Z direction in fig. 1, etc. orthogonal to the front-rear direction and the left-right 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 25 that opens 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 diagram for explaining the structure of the shielded wire 8 shown in fig. 1. 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 (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 fixing 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 and fixed to an outer peripheral surface of the insulating film 38 on the core wire covered portion 8b side (see fig. 3). In the shield material fixing 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 core wire coating portion 8b and fixed, 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 core wire coating portion 8b.
In the shield material fixing 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. In the shielding material fixing portion 8c, the shielding material 37 folded back on the outer peripheral surface of the insulating film 38 is fixed by an adhesive 39 (see fig. 3). That is, in the shield material fixing 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 and then fixed by the adhesive 39. The adhesive 39 is applied so that the entirety of the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 is covered with the adhesive 39. The outer diameter of the shielding material fixing portion 8c is larger than the outer diameter of the core wire coating portion 8b.
The shielded wire 8 further includes a covering member 40 covering the shielding material fixing portion 8 c. The covering member 40 also covers a part of the core wire covering portion 8b on the core wire exposed portion 8a side. The coating member 40 also covers a part of the core wire exposed portion 8a on the core wire coated portion 8b side. The sheathing member 40 is a heat-shrinkable tube which is heat-shrunk. The covering member 40 is formed by heating the heat shrinkable tube from the outside to shrink it in a state where the shielding material fixing portion 8c and the like have been inserted into the heat shrinkable tube before heat shrinkage. In fig. 4, the cover 40 is not shown.
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. The bushing 43 has an insertion hole 43a penetrating the bushing 43.
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. 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. The width of the notch 29e in the lateral direction is smaller than the outer diameter of the shield material fixing portion 8 c. The width of the notch 29e in the lateral direction is larger than the outer diameter of the portion of the core wire coating portion 8b covered with the coating member 40.
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. In a state where the bush 43 is held by the bush holding portion 29b, 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. In addition, the insertion hole 43a penetrates the bush 43 in the up-down direction in a state where the bush 43 is held by the bush holding portion 29b. 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. The shielding material fixing portion 8c is disposed inside the cover 29. That is, the core wire exposed portion 8a and the shielding material fixing portion 8c are disposed inside the motor case 5. The core wire coating portion 8b is inserted into the insertion hole 43a of the bushing 43 and the insertion hole 44a of the bushing cover 44, and the shielded wire 8 is led out of the cover 29 from the insertion holes 43a and 44a.
In the present embodiment, the portion of the core wire coating portion 8b covered with the coating member 40 is inserted into the insertion hole 43a. Specifically, the portion of the core wire coating portion 8b covered with the coating member 40 is pressed into the insertion hole 43a. The portion of the core wire coating portion 8b covered by the coating member 40 is disposed in the notch 29e and inserted into the insertion hole 44a.
The shielding material fixing portion 8c is disposed below the support wall portion 29d. As described above, in the shield material fixing portion 8c, since the front 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, the front end of the shield material 37 folded back onto the outer peripheral surface of the insulating film 38 is directed toward the outside of the cover 29. That is, the tip of the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 faces the outside of the motor housing 5.
As described above, the portion of the core wire coating portion 8b covered by the coating member 40 is disposed in the notch 29e. The width of the notch 29e in the lateral direction is smaller than the outer diameter of the shield material fixing portion 8 c. Therefore, the shielding material fixing portion 8c disposed below the support wall portion 29d is restricted from moving upward by the support wall portion 29d. That is, in the present embodiment, the movement of the shielding material fixing portion 8c to the outside of the cover 29 is restricted by the support wall portion 29d.
The support wall 29d of the present embodiment is a restriction portion for restricting movement of the shielding material fixing portion 8c to the outside of the motor case 5. That is, a restricting portion that restricts movement of the shielding material fixing portion 8c to the outside of the motor housing 5 is formed in the motor housing 5. The support wall portion 29d as the restricting portion constitutes a part of the bush holding portion 29b. The cover 29 of the present embodiment is a regulating portion forming member that forms a support wall portion 29d as a regulating portion.
(main effects of the present embodiment)
As described above, in the present embodiment, the shield material fixing portion 8c is formed at the boundary portion between the core wire exposed portion 8a and the core wire covered portion 8b of the shield wire 8, and the outer diameter of the shield material fixing portion 8c is larger than the outer diameter of the core wire covered portion 8b. In the present embodiment, the movement of the shield material fixing portion 8c disposed inside the cover 29 to the outside of the motor case 5 is restricted by the support wall portion 29d of the cover 29. Therefore, in the present embodiment, the pull-out of the shield wire 8 when a tensile force acts on the shield wire 8 can be prevented by the shield material fixing portion 8c and the support wall portion 29d.
In the present embodiment, since the shield fixing portion 8c is disposed inside the motor case 5, the shield fixing portion 8c having an outer diameter larger than that of the core wire coating portion 8b 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 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, in the shield material fixing 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. Therefore, in the present embodiment, the outer diameter of the shield material fixing portion 8c can be increased as compared with a case where the shield 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 pull-out of the shielded wire 8 when the tensile force acts on the shielded wire 8 can be effectively prevented.
In particular, in the present embodiment, since the shielding material fixing portion 8c is covered with the covering member 40, the outer diameter of the portion where the shielding material fixing portion 8c is formed can be further increased. Therefore, in the present embodiment, the pull-out of the shielded wire 8 when the tensile force acts on the shielded wire 8 can be more effectively prevented.
In the present embodiment, since the movement of the shielding material fixing portion 8c to the outside of the motor housing 5 is restricted by the support wall portion 29d of the resin cover 29, the movement of the shielding material fixing portion 8c to the outside of the motor housing 5 can be reliably restricted, for example, compared to the case where the movement of the shielding material fixing portion 8c to the outside of the motor housing 5 is restricted by using the rubber bush 43.
In the present embodiment, in the shielding material fixing portion 8c, the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 is fixed by the adhesive 39. Therefore, in the present embodiment, the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 can be fixed relatively easily.
In the present embodiment, in the shield material fixing portion 8c, the whole of the shield material 37 folded back onto the outer peripheral surface of the insulating film 38 is covered with the adhesive 39. In the present embodiment, the coating member 40 also covers a part of the core wire exposed portion 8a on the core wire coating portion 8b side. Therefore, in the present embodiment, the insulation between the shield material 37 and the intermediate core wire 36 can be ensured by using the adhesive 39 and the covering member 40 covering the intermediate core wire exposed portion 8a.
In the present embodiment, the distal end of the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 is directed toward the core wire coating portion 8b side, but not toward the core wire exposed portion 8a side, in the shielding material fixing portion 8 c. 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, since the shielding material fixing portion 8c is covered with the covering member 40, the insulating property of the shielding material fixing portion 8c can be reliably ensured by the covering member 40.
In the present embodiment, the portion of the core wire coating portion 8b covered with the coating member 40 is press-fitted into the insertion hole 43a of the bushing 43. Therefore, in the present embodiment, the portion of the core wire coating portion 8b covered with the coating member 40 and the bush 43 can suppress the press-fitting of the shield wire 8 when the press-fitting force for pressing the shield wire 8 into the interior of the motor case 5 (specifically, into the interior of the cover 29) acts on the shield wire 8.
In the present embodiment, the coating member 40, which is a heat shrinkable tube that is heat shrinkable, covers a part of the core wire coating portion 8b on the side of the core wire exposed portion 8a and a part of the core wire coating portion 8b on the side of the core wire exposed portion 8a, in addition to the shielding material fixing portion 8 c. In the present embodiment, the outer diameter of the core wire exposed portion 8a and the outer diameter of the core wire covered portion 8b are smaller than the outer diameter of the shield material fixing portion 8 c. Therefore, in the present embodiment, the covering member 40 covering the shielding material fixing portion 8c can be prevented from falling off from the shielding material fixing portion 8 c.
In the present embodiment, the support wall portion 29d that restricts the movement of the shielding material fixing portion 8c to the outside of the motor case 5 constitutes a part of the bush holding portion 29b that holds the bush 43. Therefore, in the present embodiment, the structure of the cover 29 can be simplified as compared with the case where the cover 29 is formed with a regulating portion that regulates the movement of the shielding material fixing portion 8c to the outside of the motor case 5 in addition to the bushing holding portion 29b.
(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, in addition to the bushing holding portion 29b, a restricting portion that restricts movement of the shielding material fixing portion 8c to the outside of the motor case 5 may be formed in the cover 29. In the above embodiment, the movement of the shielding material fixing portion 8c to the outside of the motor case 5 may be restricted by the bush 43. In this case, the width of the notch 29e in the lateral direction is wider than the outer diameter of the shielding material fixing portion 8 c. In this case, the bush 43 serves as a restricting portion for restricting the movement of the shielding material fixing portion 8c to the outside of the motor housing 5, and the bush 43 serving as the restricting portion is attached to the motor housing 5. Specifically, a bush 43 as a restricting portion is attached to the cover 29.
In the above-described embodiment, in the shield material fixing portion 8c, the shield material 37 from which the insulating film 38 is removed and exposed to the outside is folded back toward the side of the core wire coating portion 8b once, but in the shield material fixing portion 8c, the shield material 37 from which the insulating film 38 is removed and exposed to the outside may be folded back a plurality of times. In this case, the tip of the shielding material 37 folded back on the outer peripheral surface of the insulating film 38 may be directed toward the side of the core wire exposed portion 8a. In addition, in the shield material fixing 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 covering member 40 may not cover the core wire covering portion 8b. In this case, for example, the inner diameter of the insertion hole 43a of the bushing 43 is smaller than that of the bushing in the above-described embodiment, and the core wire coating portion 8b not covered with the coating member 40 is press-fitted into the insertion hole 43a. The covering member 40 may not cover the core wire exposed portion 8a. In the above embodiment, the shield wire 8 may not be provided with the covering member 40.
In the above embodiment, in the shielding material fixing portion 8c, the shielding material 37 folded back on the outer peripheral surface of the insulating film 38 is fixed by the adhesive 39, but the shielding material 37 folded back on the outer peripheral surface of the insulating film 38 may be fixed by a heat-shrinkable tube which is heat-shrunk. In this case, the shielding material 37 folded back onto the outer peripheral surface of the insulating film 38 is covered with a heat-shrinkable tube which is heat-shrunk. In this case, for example, a part of the core wire coating portion 8b on the side of the core wire exposed portion 8a and a part of the core wire coating portion 8b on the side of the core wire exposed portion 8a are also covered with a heat-shrinkable tube that is heat-shrunk. In the shielding material fixing portion 8c, the shielding material 37 folded back on the outer peripheral surface of the insulating film 38 may be fixed with a strapping.
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 (9)
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; and
a shielded wire led out from the detection mechanism toward the outside of 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 in which the shield 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 fixing portion is formed at a boundary portion between the core wire exposing portion and the core wire covering portion, the shield material of the shield material fixing portion is folded back and fixed to an outer peripheral surface of the insulating film on the core wire covering portion side,
the core wire exposing portion and the shielding material fixing portion are disposed inside the motor housing,
a restricting portion that restricts movement of the shielding material fixing portion to the outside of the motor housing is formed or mounted on the motor housing.
2. The motor of claim 1, wherein the motor is configured to control the motor to drive the motor,
in the shield material fixing 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,
in the shielding material fixing portion, the shielding material folded back onto the outer peripheral surface of the insulating film is fixed by an adhesive.
4. The motor according to claim 3, wherein,
the shield wire includes a covering member covering at least the shield material fixing portion,
the cladding member is a heat-shrinkable tube that is heat-shrinkable.
5. The motor of claim 4, wherein the motor is configured to control the motor to drive the motor,
comprises a rubber bushing for preventing liquid from penetrating into the motor housing,
the bushing is mounted on the motor housing,
an insertion hole through which the core wire coating portion is inserted is formed in the bushing,
the covering member also covers a part of the side of the intermediate core wire exposed portion of the intermediate core wire covering portion,
a portion of the core wire coating portion covered by the coating member is press-fitted into the insertion hole.
6. The motor of claim 5, wherein the motor is configured to control the motor to drive the motor,
the coating member also covers a portion of the core wire-coated portion side of the core wire-exposed portion.
7. The motor according to any one of claims 1 to 6, wherein,
the motor housing includes a restricting portion forming member made of resin, and the restricting portion forming member is formed with the restricting portion.
8. The motor of claim 7, wherein the motor is configured to control the motor to drive the motor,
comprises a rubber bushing for preventing liquid from penetrating into the motor housing,
an insertion hole through which the core wire coating portion is inserted is formed in the bushing,
a bush holding portion for holding the bush is formed on the restricting portion forming member,
the restricting portion constitutes a part of the bush holding portion.
9. The motor according to any one of claims 1 to 8, wherein,
in the shielding material fixing 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 |
|---|---|---|---|
| JP2020-079031 | 2020-04-28 | ||
| JP2020079031A JP7443148B2 (en) | 2020-04-28 | 2020-04-28 | motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113572301A CN113572301A (en) | 2021-10-29 |
| CN113572301B true CN113572301B (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110466717.5A Active CN113572301B (en) | 2020-04-28 | 2021-04-28 | Motor with a motor housing having a motor housing with a motor housing |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7443148B2 (en) |
| CN (1) | CN113572301B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012113885A (en) * | 2010-11-22 | 2012-06-14 | Sumitomo Wiring Syst Ltd | Shield wire |
| CN102857019A (en) * | 2011-06-27 | 2013-01-02 | 日本电产三协株式会社 | Electric motor |
| JP2013123019A (en) * | 2011-12-12 | 2013-06-20 | Sumitomo Wiring Syst Ltd | Shield structure of electric wire |
| CN203312563U (en) * | 2012-07-06 | 2013-11-27 | 日本压着端子制造株式会社 | Shield wire harness |
| JP2015130276A (en) * | 2014-01-08 | 2015-07-16 | 矢崎総業株式会社 | Shielded wire |
| JP2015198041A (en) * | 2014-04-02 | 2015-11-09 | 日立金属株式会社 | wiring member |
| CN108028499A (en) * | 2015-09-14 | 2018-05-11 | 株式会社自动网络技术研究所 | Shielded connector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001313100A (en) | 1999-04-15 | 2001-11-09 | Auto Network Gijutsu Kenkyusho:Kk | Shield connector |
| JP2003282189A (en) | 2002-03-26 | 2003-10-03 | Yazaki Corp | Mounting structure of shield electric wire |
| JP5709073B2 (en) | 2014-01-22 | 2015-04-30 | 日立金属株式会社 | Oil cooling equipment harness |
| JP6948872B2 (en) | 2017-07-31 | 2021-10-13 | 日本電産サンキョー株式会社 | motor |
-
2020
- 2020-04-28 JP JP2020079031A patent/JP7443148B2/en active Active
-
2021
- 2021-04-28 CN CN202110466717.5A patent/CN113572301B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012113885A (en) * | 2010-11-22 | 2012-06-14 | Sumitomo Wiring Syst Ltd | Shield wire |
| CN102857019A (en) * | 2011-06-27 | 2013-01-02 | 日本电产三协株式会社 | Electric motor |
| JP2013123019A (en) * | 2011-12-12 | 2013-06-20 | Sumitomo Wiring Syst Ltd | Shield structure of electric wire |
| CN203312563U (en) * | 2012-07-06 | 2013-11-27 | 日本压着端子制造株式会社 | Shield wire harness |
| JP2015130276A (en) * | 2014-01-08 | 2015-07-16 | 矢崎総業株式会社 | Shielded wire |
| JP2015198041A (en) * | 2014-04-02 | 2015-11-09 | 日立金属株式会社 | wiring member |
| 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 |
|---|---|
| CN113572301A (en) | 2021-10-29 |
| JP2021175311A (en) | 2021-11-01 |
| JP7443148B2 (en) | 2024-03-05 |
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