JP2007185055A - Sealing structure for connector and sealing type brushless motor using same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a preferable sealing structure for a connector with a simple structure, and to provide a sealing type brushless motor using the sealing structure. <P>SOLUTION: A connector portion 42 inserted in a through hole 11a of a lid plane 11 of a cover body 10 is composed of an outer projection portion 42a projecting to the outside and a diametrical expanding portion 42b formed in the sealed area 13. A positioning recessed portion 42b1 for positioning an elastic sealing member 80 is formed at an upper surface of the diametrical expanding portion 42b. The elastic sealing member 80 is sandwiched between the positioning recessed portion 42b1 and the lid plane 11 for elastic deformation. A plate-shaped member 70 is fixed at an upper surface of the lid plane 11 so that the connector portion 42 may not move by a reaction force of the elastic deformation. With this constitution, the elastic sealing member 80 brings the positioning recessed portion 42b1 into close contact with the lid plane 11 in an axial direction and a diametrical direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sealing structure that prevents intrusion into a brushless motor from a connector portion of a hermetic brushless motor.

  Conventionally, in a structure that allows liquid such as water to the outside of a sealed space of a brushless motor such as a water pump, how to prevent the entry to the sealed space from the outside has been an important issue. In particular, various sealing structures are employed in connectors that must protrude from the inside of this sealed space. For example, Patent Document 1 adopts a structure in which an O-ring is disposed and sealed between a connector and a cover body.

JP 2003-348785 A

  However, in the case of a structure in which an O-ring is only attached between a cover body that forms a sealed space and a connector that protrudes outward from the cover body as in Patent Document 1, the connector may be removed due to a molding error of the connector. If the cover body is molded with a small diameter and the cover body is molded with a large outer diameter due to a molding error of the cover body, the sealing force of the O-ring between them becomes weak. As a result, this sealing structure may not be able to prevent entry into the sealed space.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a good connector sealing structure with an easy structure and a hermetic brushless motor using the sealing structure. It is to be.

  According to the first aspect of the present invention, a connector for electrically connecting the inside and outside of the apparatus main body is connected to the wall portion of the apparatus main body, and the connection port portion penetrates the through hole of the wall portion to externally attach the apparatus. A connector mounting device that is mounted in a protruding state, wherein the connector has a mounting seat portion larger in diameter than the connection port portion on the device main body side of the connection port portion, and the mounting seat portion and the wall portion. An elastic sealing member that seals the gap is disposed in the gap that is formed, and the connector projects the connection port portion through the through-hole of the wall portion to the outside of the apparatus body, and the elastic sealing member is It is characterized by comprising position holding means for holding the position of the connection port part with respect to the wall part in a compressed state between the mounting seat part and the wall part.

  According to the first aspect of the present invention, since the elastic sealing member for sealing the gap between the connector and the wall portion is held in a compressed state by the position holding means, the sealing performance between the connector and the wall portion is achieved. Can be improved. Further, since the elastic sealing member is in a compressed state, even if there is an attachment error of the connector, the elastic member spreads by this error, thereby ensuring sealing. Therefore, a highly reliable connector sealing device can be provided regardless of the mounting accuracy of the connector.

  According to a second aspect of the present invention, in accordance with the first aspect, the elastic sealing member is disposed on an opposing surface of the wall portion of the mounting seat portion, and the elastic surface of the mounting seat portion includes the elastic surface. A positioning recess for positioning the sealing member is formed.

  According to claim 2 of the present invention, the elastic sealing member is stably disposed in the gap between the wall portion and the connector by forming the positioning concave portion of the elastic sealing member on the opposing surface of the mounting seat portion. Can do. Therefore, it is possible to prevent the uneven sealing performance due to the displacement of the elastic sealing member.

  According to a third aspect of the present invention, in accordance with the second aspect, in the mounting seat portion, the opposing surface of the wall portion on the side having a larger diameter than the positioning recess is in contact with the wall portion. To do.

  According to the third aspect of the present invention, a double sealing structure with the elastic sealing member can be formed by abutting the opposing surface on the larger diameter side with respect to the positioning recess of the mounting seat and the wall. Therefore, the sealing performance can be further improved.

  According to a fourth aspect of the present invention, in accordance with any one of the first to third aspects, an engagement groove is formed on the side of the mounting seat portion on the outer periphery of the connection port portion, and the position holding means Is constituted by a plate-like member, and the connection port portion of the connector protrudes outside the apparatus main body through the through hole of the wall portion, and the elastic sealing member is interposed between the mounting seat portion and the wall portion. In the compressed state, the plate member is engaged with the engagement groove of the connection port on the opposite side of the wall portion from the elastic sealing member.

  According to claim 4 of the present invention, the plate-like member is elastically sealed by engaging the plate-like member with the engagement groove formed in the connection port of the connector in a state where the elastic seal member is compressed. It becomes the form which suppresses the restoring force of a member, and can achieve favorable sealing.

  According to a fifth aspect of the present invention, according to the fourth aspect, the plate-like member is formed in a substantially U-shape or a substantially U-shape, and a portion surrounding three sides of the plate-like member is the connection port portion. It is characterized by engaging with the engaging groove.

  According to claim 5 of the present invention, when the plate-like member is formed in a substantially U-shape or a substantially U-shape, it is inserted into the engagement groove from the radial direction when engaging with the engagement groove. Can do. Therefore, the plate member can be easily attached.

  According to claim 6 of the present invention, according to any of claims 4 and 5, the wall portion is formed with a second wall portion substantially parallel to the connection rear portion, and the plate-like member is It is bent by plastic working so as to come into contact with the second wall portion.

  According to claim 6 of the present invention, the plate-like member is easily fixed to the wall portion by bending the plate-like member so as to contact the second wall portion after engaging the plate-like member with the engaging groove. can do.

  According to claim 7 of the present invention, according to any one of claims 1 to 3, the position holding means is a recess formed in a direction in which the diameter is reduced in at least two opposing positions of the connection port portion. And a positioning projection formed on the wall portion facing the concave portion, and at least a tip of the positioning projection portion is formed to have a smaller diameter than the concave portion, and the positioning projection portion is formed in the concave portion. The position is maintained by abutting.

  According to claim 7 of the present invention, the connector can be held in a state in which the elastic sealing member is compressed by the positioning protrusion formed on the wall contacting the recess formed on the connection port. it can. With this positioning projection, the positioning and holding means does not use a separate member, so the number of parts can be reduced.

  According to an eighth aspect of the present invention, according to any one of the first to third aspects, the position holding means is formed in a part of the connection port portion and has a diameter larger than that of the through hole. The directional protrusion has a structure that abuts against the surface of the wall opposite to the mounting seat.

  According to the eighth aspect of the present invention, the connector can be held in a state where the elastic sealing member is compressed by the radial protrusion coming into contact with the surface of the wall opposite to the mounting seat. . Because of this radial protrusion, the positioning and holding means does not use a separate member, so the number of parts can be reduced.

  According to a ninth aspect of the present invention, in accordance with the eighth aspect, the radial protrusion is elastically deformed in a direction in which the diameter decreases.

  According to the ninth aspect of the present invention, the radial protrusion is elastically deformed in the direction of decreasing the diameter, thereby achieving the position holding of the connector in a state where the elastic sealing member is compressed only by inserting the connector from one side. can do. That is, in the through hole portion of the wall portion, the radial protrusion is elastically deformed to the side where the diameter becomes smaller, and after inserting the through hole, the radial protrusion becomes the diameter of the through hole by the restoring force on the side where the diameter becomes larger. Elastically deforms to the larger side. Since position retention can be achieved simply by inserting the connector, the number of work steps can be reduced.

  According to the tenth aspect of the present invention, the rotating body that rotates around the rotating shaft and the cover that is formed in the shape of a covered cylinder having an opening on one end side and that has a through hole in a part of the outer peripheral surface thereof. Body, an armature disposed on the inner peripheral side of the cover body, a bus bar disposed on the other end side of the armature and provided with a terminal and a circuit board connected to the armature, and protruding from the through hole A connector electrically connected to the circuit board, an elastic sealing member disposed between the cover body and the connector, and an opening of the cover body, A brushless motor comprising a sealing member that forms a sealed space with the cover body, wherein the cover body, the connector, and the elastic sealing member are attached to the connector according to claim 1. It has the apparatus.

  According to the tenth aspect of the present invention, by using the connector mounting device as in the present invention to a brushless motor having a circuit board therein, dust and dust can enter from the gap between the connector and the cover body. Can be prevented. Furthermore, even when the brushless motor is immersed in the liquid, the liquid can be prevented from entering through the gap between the connector and the cover body. Therefore, it is possible to prevent electrical short-circuit due to dust, dirt or liquid adhering to the circuit board disposed inside the cover body. Therefore, a highly reliable brushless motor can be provided.

  According to an eleventh aspect of the present invention, in accordance with the tenth aspect, the bus bar and the connector are integrally formed.

  According to the eleventh aspect of the present invention, since the bus bar and the connector are integrally formed, the number of parts can be reduced. Further, since the connector is fixed by the positioning means, the bus bar integrated with the connector can be well held.

  According to a twelfth aspect of the present invention, according to any one of the tenth and eleventh aspects, the sealing member is formed of a non-conductive member in a substantially covered cylindrical shape, and the cylindrical portion of the sealing member includes: It arrange | positions so that the said rotary body and the said armature may be separated, The said armature side is sealed, It is characterized by the above-mentioned.

  According to claim 12 of the present invention, the present invention may be applied to a so-called canned motor in which a rotating body and an armature are separated by a non-conductive member. Since the armature side is sealed only by the contact between the sealing member and the cover body, the sealing performance can be further improved. Thereby, it is possible to provide a highly reliable brushless motor that prevents an electrical short circuit due to dust, dirt, and liquid.

  According to the present invention, it is possible to provide an excellent connector sealing structure with an easy structure and a hermetic brushless motor using the sealing structure.

<Overall structure of brushless motor>
One embodiment of the hermetic brushless motor of the present invention will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view in the axial direction of a hermetic brushless motor.

  Referring to FIG. 1, a cover body 10 has a covered cylindrical shape in which one end is formed by plastic processing such as press working of a steel plate. A through hole 11 a is formed in a part of the cover surface 11 of the cover body 10. Further, the cylindrical portion 12 of the cover body 10 is formed with three cylindrical portions whose outer diameter increases stepwise toward the opening. The cylindrical portions are referred to as a first cylindrical portion 12a, a second cylindrical portion 12b, and a third cylindrical portion 12c in order of increasing outer diameter.

  On the inner peripheral surface of the first cylindrical portion 12a having the largest outer diameter, a sealing member 20 that forms a sealed space 13 inside the cover body 10 is fixed by sealing the opening. The sealing member 20 has a covered cylindrical shape with one end opened by a non-conductive member such as resin.

  An armature 30 formed in an annular shape is fixed to the inner peripheral surface of the second cylindrical portion 12b having the second largest outer diameter. The armature 30 includes an armature core 31 formed by laminating a plurality of thin electromagnetic steel sheets, an insulator 32 that electrically insulates the armature core 31, and a conductor that winds around the insulator 32. 33. The armature 30 is sandwiched between the cylindrical portion 12 of the cover body 10 and the cylindrical portion 21 of the sealing member 20.

  A substantially annular bus bar 40 formed by resin molding is disposed on the inner peripheral surface of the third cylindrical portion 12c having the smallest outer diameter. The bus bar 40 includes a terminal portion 41 that electrically connects the conductor 33 of the armature 30 and a connector portion 42 that is electrically connected to the outside. With this configuration, the number of parts can be reduced by integrally forming the connector portion 42 and the bus bar 40. A circuit board 50 that controls the rotation of the brushless motor is fixed to the lower surface of the bus bar 40 so as to face the lid surface 22 of the sealing member 20 with a gap in the axial direction.

  A rotating body 60 is disposed substantially concentrically with the armature 30 outside the sealed space 13 surrounded by the cylindrical portion 21 and the lid surface 22 of the sealing member 20. The rotating body 60 includes a shaft 61 that rotates along a rotation axis, a rotor magnet 62 that is arranged coaxially with the shaft 61 and serves as a rotational driving force, and a substantially cylindrical shape that is fixed to the inner peripheral surface of the rotor magnet 62. And a connecting portion 64 that integrally connects them in a substantially H shape with a resin mold.

  When the rotating body 60 is put in the sealed space 13, the shaft 61 of the rotating body 60 is protruded to the outside of the sealing member 20, so that a part of the sealing member 20 needs an insertion hole through which the shaft 61 is inserted. turn into. Therefore, the sealing performance is deteriorated by the gap between the insertion hole and the shaft. However, the structure in which the rotating body 60 is not inserted into the sealed space 13 as in the present invention, that is, the sealed space 13 is formed by the contact of the cover body 10 and the sealed member 20, thereby providing an insertion hole for the shaft 61. There is no need, and the sealing performance can be dramatically improved. This is particularly suitable for a brushless motor handling liquid such as a pump.

  A magnetic field is generated around the armature 30 by flowing from the external power source to the armature 30 through the connector portion 42. The rotating body 60 rotates by obtaining a rotational driving force by the interaction between the magnetic field and the rotor magnet 62.

<Main part>
Next, a sealing structure between the cover body 10 and the connector part 42, which is a main part of the present invention, will be described with reference to FIGS. FIG. 2 is a top view of the hermetic brushless motor. FIG. 3 is a top view of a plate-like member described later. FIG. 4 is an enlarged view of a dotted circle in FIG.

  With reference to FIG. 2, the substantially rectangular connector part 42 of the bus bar 40 is inserted into the through hole 11a of the lid surface 11 of the cover body 10 so as to protrude to the outside. A plate-like member 70 that holds the three surfaces of the connector portion 42 is fixed.

  With reference to FIG. 3, a plate-like member 70 formed by plastic working such as press working is a thin plate formed in a substantially U shape. A bent portion 71 is formed at both ends of the U-shaped portion of the plate-like member 70. When the bent portion 71 is attached to the connector portion 42, the bent portion 71 protrudes radially outward from the cylindrical portion 12 of the cover body 10. The protruding bent portion 71 is fixed to the outer peripheral surface of the cylindrical portion 12 by bending downward by plastic working such as press working (see FIG. 1 or FIG. 4). Thereby, holding | maintenance of the radial direction of a plate-shaped member can be achieved.

  Next, referring to FIG. 4, the connector part 42 of the bus bar 40 includes a connection port part 42 a protruding from the cover body 10 to the outside, a mounting seat part 42 b formed on the sealed space 13 side of the cover body 10, And a plurality of connector pins 42c for supplying current from a power source.

  Between the lower surface of the cover surface 11 of the cover body 10 and the upper surface of the mounting seat portion 42b of the connector portion 42, an annular elastic sealing member 80 formed of an elastic member is disposed. A positioning recess 42b1 for positioning the elastic sealing member 80 in the radial direction is formed on the upper surface of the mounting seat 42b. The elastic sealing member 80 seals the connector part 42 and the cover body 10 by being sandwiched between the cover surface 11 of the cover body 10 and the mounting seat part 42b.

  Next, the formation of the sealing structure between the cover body 10 and the connector portion 42 will be described with reference to FIG. FIGS. 5A to 5D are views sequentially illustrating the process of forming the sealing structure.

  Referring to a), engagement grooves 42a1 are formed on the three surfaces that hold the plate-like member 70 of the connection port portion 42a of the connector portion 42. The axial height of the engaging groove 42a1 is formed to be equal to or slightly larger than the axial thickness of the plate member 70.

  With reference to b), the elastic sealing member 80 is disposed on the positioning recess 42b1 of the mounting seat 42b. Here, it is important that the axial depth of the positioning recess 42b1 is shallower than the diameter of the elastic sealing member 80. As a result, it is possible to secure a crushing surface where the elastic sealing member 80 is crushed by the cover surface 11 of the cover body 10.

  Referring to c), the connector part 42 is arranged so that the elastic sealing member 80 contacts the lower surface of the lid surface 11. At this time, the lid surface 11 and the engagement groove 42a1 of the connection port 2a are in a state of overlapping in the axial direction. In such a state, by pushing the connector portion 42 in the direction of the arrow (upward in the axial direction) in the drawing, the lid surface 11 is positioned below the engaging groove 42a1 in the axial direction. As a result, the elastic sealing member 80 is crushed, and the gap between the lid surface 11 and the positioning recess 42b1 is abutted sufficiently in the axial direction and the radial direction without any gap. Therefore, the cover body 10 and the connector part 42 can be favorably sealed.

  Furthermore, with reference to d), when the cover surface 11 is in a state of being positioned below the engagement groove 42a1 in the axial direction, the plate member 70 is fitted into the engagement groove 42a1. Then, the plate member 70 is fixed by bending the bent portion 71 of the plate member 70. The portion of the plate-like member 80 that engages with the engaging groove 42 a 1 exhibits a holding force against the restoring force of the elastic sealing member 80, thereby preventing the connector portion 42 from moving downward in the axial direction. can do. Therefore, the sealing force of the elastic sealing member 80 can be stabilized. Thereby, the sealing structure which is not influenced by the shaping | molding error of each member can be provided. Further, the facing surface 42b2 formed on the outer side in the radial direction from the elastic sealing member 80 of the mounting seat portion 42b contacts the lower surface of the lid surface 11. Thereby, since a double sealing structure with the elastic sealing member 80 is formed, the sealing force can be further improved. Further, since the plate-like member 70 is bent so as to contact the outer peripheral surface of the cylindrical portion 12, the radial movement of the plate-like member 70 is restricted in a state where the plate-like member 70 is engaged with the engagement groove 42a1. Can do. Therefore, the plate-like member 70 can be fixed in the axial direction and the radial direction. As a result, it is possible to provide a highly reliable brushless motor in which the plate-like member 70 does not come off against an external impact or the like.

<Other embodiment 1 of main part>
Next, another embodiment of the main part will be described with reference to FIGS. FIG. 6 is a top view of the brushless motor. FIG. 7 is an enlarged view of a main part corresponding to FIG. 6 and 7, since only the cover body is changed, the cover body number is 90, and the one-digit number corresponds to the cover body 10 described above. Further, the plate-like member 80 is omitted. Other members are described with the same numbers because there is no change in structure.

  Referring to FIG. 6, bent portions 94 that are bent toward the upper side in the axial direction are formed on the pair of inner peripheral edges of the through hole 91 a of the lid surface 91 of the cover body 90.

  Referring to FIG. 7, a radial bent portion 94 a that is further bent in the radial direction is formed at the distal end portion of the bent portion 94 formed on the lid surface 91. The radially bent portion 94a is located on the inner side of the engagement groove 42a1 of the connector portion 42 and abuts on the inner upper surface of the engagement groove 42a1. Thereby, the axial direction position of the connector part 42 is hold | maintained.

  Next, the formation process of the sealing structure of Example 1 will be described with reference to FIG. FIGS. 8A to 8D are diagrams sequentially illustrating the formation process of the sealing structure.

  With reference to a) of FIG. 8, first, a bent portion 94 is formed in the through hole 91 a of the cover body 90.

  Next, referring to b), the elastic sealing member 80 is disposed in the positioning recess 42b1 of the mounting seat portion 42b of the connector portion 42.

  Next, referring to c), the cover body 90 is arranged in the state of b). At this time, the elastic sealing member 80 is brought into contact with the axial direction and the radial direction of the gap between the lower surface of the lid surface 91 and the positioning recess 42b1 without any gap. In this state, the distal end portion of the bent portion 94 is formed at a position that is equal to or slightly higher than the axial position of the engagement groove 42a1.

  Next, referring to d), in the state of c) described above, the bent portion 94 is bent radially inward by plastic working such as press working to form the radially bent portion 94a. Thereby, the connector part 42 is hold | maintained in the state in which the elastic sealing member 80 fully exhibits sealing force. Further, the facing surface 42b2 formed on the outer side in the radial direction from the elastic sealing member 80 of the mounting seat portion 42b contacts the lower surface of the lid surface 11. Thereby, since a double sealing structure with the elastic sealing member 80 is formed, the sealing force can be further improved.

<Other Embodiment 2 of Main Part>
Next, another embodiment of the main part will be described with reference to FIGS. FIG. 9 is a top view of the brushless motor. FIG. 10 is an enlarged view of a main part corresponding to FIGS. 9 and 10 have a structure in which only the connector portion 42 is changed, the connector portion 100 is used. Since the other constituent members have the same structure, the same reference numbers are used.

  With reference to FIG. 9, the connector portion 100 protrudes into the through hole 11 a of the cover surface 11 of the cover body 10. A radial protrusion 101 is formed on the outer peripheral surface of the connector unit 100.

  With reference to FIG. 10, a mounting seat portion 102 is formed on the sealed space 13 side of the connector portion 100. An elastic sealing member 80 is disposed in the gap between the upper surface of the mounting seat portion 102 and the lower surface of the lid surface 11. A positioning recess 102 a for positioning the elastic sealing member 80 is formed on the upper surface of the mounting seat portion 102. The shape of the enormous diameter portion 102 is the same as that of the above two embodiments.

  Radial protrusions 101 that are elastically deformed toward the connection port 103 are formed on at least two opposing surfaces of the connection port 103 protruding from the cover surface 11 of the connector unit 100. The radial protrusion 101 is formed so as to be located outside the inner peripheral edge of the through hole 11 a of the lid surface 11. In addition, an inclined surface 101a whose diameter decreases toward the upper side is formed on the upper portion of the radial protrusion 101. Further, on the connection port 103 side of the radial protrusion 101, an allowable recess 101b that allows the radial protrusion 101 to move by elastic deformation is provided.

  Next, the formation process of the sealing structure of Example 2 will be described with reference to FIG. FIGS. 11A to 11D are diagrams sequentially illustrating the formation process of the sealing structure.

  With reference to a), the elastic sealing member 80 is disposed in the positioning recess 102 a in the mounting seat portion 102 of the connector portion 100. Here, it is important that the axial gap between the lower end portion of the radial protrusion 101 and the elastic sealing member 80 is sufficiently smaller than the plate thickness of the lid surface 11.

  Next, referring to b), the external protrusion 103 is inserted into the through hole 11a of the cover body 10 in the state of a).

  Next, with reference to c), c) shows the way in which the radial protrusion 101 is inserted into the through hole 11a. At this time, the inclined surface 101a of the radial protrusion 101 first comes into contact with the lower part of the inner peripheral edge of the through hole 11a. Further, by inserting the connection port 103 further, the radial protrusion 101 is elastically deformed toward the external protrusion 103 and can be inserted into the through hole 11a.

  Finally, referring to d), when the lid surface 11 is positioned below the radial projection 101, the radial projection 101 is positioned outside the through-hole 11a by its restoring force. . And the upper surface of the cover surface 11 and the lower end part of the radial direction projection part 101 contact | abut. As a result, the connector unit 100 is held. In this state, since the axial gap between the lower end of the radial protrusion 101 and the upper surface of the lid surface 11 is sufficiently smaller than the plate thickness of the lid surface 11, the elastic sealing member 80 is positioned with respect to the lower surface of the lid surface 11. It can contact | abut without the clearance gap between the axial direction and radial direction of the clearance gap with the recessed part 102a. Accordingly, the sealing force by the elastic sealing member 80 can be improved. Furthermore, one surface 102b formed radially outward from the elastic sealing member 80 of the enormous diameter portion 42b contacts the lower surface of the lid surface 11. Thereby, since a double sealing structure with the elastic sealing member 80 is formed, the sealing force can be further improved.

  As mentioned above, although the various forms of the Example of this invention were demonstrated, this invention is not limited to this, A various deformation | transformation other than an Example is possible.

  For example, the sealing structure of the connector portion of the present invention uses a covered cylindrical cover body, but the present invention is not limited to this. For example, as shown in FIGS. 12A to 12C, a connector part 120 is formed to protrude from one surface of the wall part 110 forming the outer frame of the sealed structure to the outside of the sealed space 111, and the wall part 110 and the connector part 120 are connected to each other. It is only necessary that the elastic sealing member 80 is disposed between them and the connector position holding means 120 for holding this state is formed. Here, the connector position holding means 130 corresponds to the plate-like member 70, the bent portion 94, and the radial protrusion 101 in this embodiment.

  Moreover, although the sealing structure of the connector part of this invention was formed in the cover surfaces 11 and 91 of the cover bodies 10 and 90, it is not limited to this. For example, it may be formed in the cylindrical portions 12 and 92 of the cover body 10.

  Moreover, although the brushless motor in the Example of this invention used the lid-shaped cylindrical sealing member 20 and made sealing structure other than the rotary body 60, it is not limited to this. The sealing member 20 only needs to have a shape that can seal the opening of the cover body 10, and the present invention is applicable to a brushless motor having a general sealing structure.

  Further, in the radial projection 101 of the connector portion 100 according to the second embodiment of the present invention, the radial projection 101 can be moved by elastic deformation by forming the allowable recess 101b. The direction protrusion is not limited to this. Any structure that can move in the radial direction and is finally located outside the through hole 11a of the lid surface 11 may be used.

  Moreover, in the Example of this invention, although it was the sealing structure only with one elastic sealing member 80, this invention is not limited to this. An elastic sealing member having a large diameter may be further provided on the outer peripheral side of the elastic sealing member 80. According to this structure, the sealing force can be further improved.

It is the schematic cross section cut in the axial direction which showed one form of the Example of the brushless motor concerning this invention. It is a top view of the brushless motor concerning the present invention. It is a top view of the plate-shaped member concerning this invention. It is an enlarged view of the dotted line circle of FIG. It is the figure which showed the process of the sealing device of the connector concerning this invention. It is the top view which showed other Example 1 of the sealing device of the connector concerning this invention. It is the schematic cross section which showed other Example 1 of the sealing device of the connector concerning this invention. It is the figure which showed the process of other Example 1 of the sealing device of the connector concerning this invention. It is the top view which showed other Example 2 of the sealing device of the connector concerning this invention. It is the schematic cross section which showed other Example 2 of the sealing device of the connector concerning this invention. It is the figure which showed the process of other Example 2 of the sealing device of the connector concerning this invention. It is the schematic diagram which showed the sealing device of the connector concerning this invention.

Explanation of symbols

10, 90 Cover body 11, 91 Cover surface (first wall)
11a, 91a Through-hole 12 Cylindrical part (second wall part)
20 Sealing member 30 Armature 40 Bus bar 41 Terminal portion 42, 100, 120 Connector portion 42a, 103 Connection port portion 42a1 Engaging groove 42b, 102 Mounting seat portion 42b1, 102a Positioning recess 42b2 Opposing surface 50 Circuit board 60 Rotating body 70 Plate Shaped member 71 bent portion 80 elastic sealing member 94 bent portion 94a radially bent portion 101 radially protruding portion 110 wall portion 130 position holding means

Claims (12)

A connector mounting device for attaching a connector for electrically connecting the inside and outside of the apparatus main body to the wall of the apparatus main body in a state where the connection port portion penetrates the through-hole of the wall portion and protrudes outside the apparatus There,
The connector has a mounting seat portion larger in diameter than the connection port portion on the apparatus main body side of the connection port portion,
In the gap formed between the mounting seat portion and the wall portion, an elastic sealing member that seals the gap is disposed,
The connector projects the connection port portion through the through-hole of the wall portion to the outside of the apparatus body,
A connector mounting comprising position holding means for holding the position of the connection port with respect to the wall in a state where the elastic sealing member is compressed between the mounting seat and the wall. apparatus. The elastic sealing member is disposed on an opposing surface of the wall portion of the mounting seat portion,
The connector mounting device according to claim 1, wherein a positioning recess for positioning the elastic sealing member is formed on an opposing surface of the mounting seat portion. In the mounting seat,
The connector mounting device according to claim 2, wherein the opposing surface of the wall portion on the side having a larger diameter than the positioning recess comes into contact with the wall portion. An engagement groove is formed on the mounting seat portion side of the outer periphery of the connection port portion,
The position holding means is constituted by a plate-shaped member;
The connection port portion of the connector protrudes outside the apparatus main body through the through hole of the wall portion, and the elastic sealing member is compressed between the mounting seat portion and the wall portion, The connector mounting device according to any one of claims 1 to 3, wherein the plate-like member is engaged with an engagement groove of the connection port portion on a side opposite to the elastic sealing member. The plate-like member is formed in a substantially U shape or a substantially U shape,
The connector mounting device according to claim 4, wherein a portion surrounding the three sides of the plate-like member is engaged with an engagement groove of the connection port portion. A second wall portion substantially parallel to the connection rear portion is formed on the wall portion,
The connector mounting structure according to any one of claims 4 and 5, wherein the plate-like member is bent by plastic working so as to abut on the second wall portion. The position holding means is
A recess formed in a direction to reduce the diameter in at least two opposing portions of the connection port; and
Positioning protrusions formed on the wall portion facing the recess;
Composed by
The at least tip of the positioning projection is formed to have a diameter smaller than that of the recess, and the position is held by the positioning projection coming into contact with the recess. The connector attachment apparatus in any one of. The position holding means is
A radial protrusion formed in a part of the connection opening and having a diameter larger than that of the through hole is in contact with the surface of the wall opposite to the mounting seat. The connector attachment apparatus in any one of Claim 1 thru | or 3.   The connector mounting device according to claim 8, wherein the radial protrusion is elastically deformed in a direction in which the diameter decreases. A rotating body that rotates around a rotation axis;
A cover body that is formed in a covered cylindrical shape having an open end and a wall portion having a through hole in a part of its outer peripheral surface;
An armature disposed on the inner peripheral side of the cover body;
A bus bar disposed on the other end side of the armature and provided with a terminal and a circuit board connected to the armature;
A connector having a connection port protruding from the through hole, and electrically connected to the circuit board;
An elastic sealing member disposed between the cover body and the connector;
A sealing member that seals the opening of the cover body and forms a sealed space with the cover body;
A brushless motor with
The said cover body, the said connector, and the said elastic sealing member have the attachment apparatus of the connector of Claims 1 thru | or 9, The brushless motor characterized by the above-mentioned.   The brushless motor according to claim 10, wherein the bus bar and the connector are integrally formed. The sealing member is formed of a non-conductive member in a substantially covered cylindrical shape,
The cylindrical portion of the sealing member is disposed so as to separate the rotating body and the armature,
The brushless motor according to claim 10, wherein the armature side is sealed.

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