JP6541442B2 - Cover sealing structure and controller having the sealing structure - Google Patents

Description

  The present invention relates to a sealing structure of a cover and a controller provided with the sealing structure.

BACKGROUND Conventionally, among controllers for controlling the drive of a driven object such as a motor, there is one disclosed in Patent Document 1, for example. This comprises a base member on which the terminal of the controller is disposed and a cover covering the terminal exposed to a part of the base member. Such a base member and the cover are fixed, for example, by an adhesive or the like.
There is also known a method of securing air tightness by attaching a cover to a base member via an annular sealing material such as an O-ring. In order to ensure the air tightness by such a sealing material, the sealing material is compressed in the mounting direction of the cover and sealed in the compression direction.

JP, 2014-108030, A

  However, when the cover is attached to the base member via the seal member, the seal member is formed when the seal member is crushed at the respective wall portions of the cover and the base member (compressed in the direction orthogonal to the attachment direction of the cover). When the parting line which remained at the time may contact each wall part, there was a subject in securing airtightness when a cover is attached to a base member.

  Therefore, the present invention relates to a controller including a base member, a cover that covers a part of the base member, and an annular seal member provided between the base member and the cover, wherein airtightness when the cover is attached to the base member To ensure that

As means for solving the above-mentioned problems, the invention according to claim 1 comprises a base member, a cover which covers a part of the base member, and an annular seal member provided between the base member and the cover. The cover has a sealing structure, and the cover includes a top plate portion covering the portion, and an annular cover wall portion rising from the top plate portion toward the base member and surrounding the portion. The base member has an annular first base wall portion in contact with the inner peripheral side or the outer peripheral side of the cover wall portion via the sealing material, and the first base wall portion in a radial direction sandwiching the sealing material. A second base wall provided on the opposite side of the cover, and a parting line is formed on the seal member avoiding a position in contact with the cover wall and the first base wall , and the cover wall At the cover wall A plurality of ribs provided on the opposite side in the radial direction to the side on which the sealing material is provided, and extending in the thickness direction, the ribs include the cover wall portion and the second base It is characterized in that it is disposed between the wall portion .

  The invention described in claim 2 is characterized in that the cover is attached to the base member in a state where the sealing material is compressed in the radial direction of the cover wall and the base wall.

In the invention described in claim 3, the cover wall portion and the base wall portion are tapered so as to avoid biting of the seal material when the cover is attached to the base member via the seal material. A part is formed.

  The invention described in claim 4 is characterized in that the cover and the base member are provided with a floating preventing portion for preventing the cover from rising from the base member.

  The invention according to claim 5 is characterized in that the floating preventing portion includes a locking portion that locks the cover to the base member.

  In the invention described in claim 6, the locking portion includes a cover-side locking portion provided on the cover and a base-side locking portion provided on the base member, and the cover-side locking portion A pair of leg portions extending from the top plate portion toward the base member, and a connecting portion connecting the end portions of the pair of leg portions, the base side locking portion locks to the connecting portion It is characterized by including a claw portion.

  The invention described in claim 7 is characterized in that the connecting portion has a thick portion which is larger than the thickness of the pair of legs at least at a portion sandwiched by the pair of legs.

The invention described in claim 8 is characterized in that the top plate portion has an arc rib extending in a thickness direction and having an arc shape as viewed from the thickness direction.
In the invention described in claim 9, the base member is a rectangular base body, a terminal connection portion provided with the first base wall portion and the second base wall portion, the base body and the terminal connection portion And a triangular flange connecting the two.
The invention described in claim 10 is characterized by further comprising a housing attached to the base member, wherein the housing comprises a motor connecting portion to which a motor is integrally connected.

In the invention described in claim 11 , a terminal including a plurality of conductive plate members is disposed on the base member, and the cover covers a portion of the terminal and a fastening portion of the motor. It is characterized in that it is arranged in

According to a twelfth aspect of the present invention, the cover and the base member are provided with a floating preventing portion for preventing the cover from rising from the base member, and the floating preventing portion uses the cover as the base member. A locking portion for locking is provided, and the locking portion is a first locking portion provided on the outer side of the cover, and a second locking portion provided on the inner side of the cover and facing the fastening portion. And the like.

In the invention described in claim 13 , the first locking portion includes a first cover-side locking portion provided on the cover, and a first base-side locking portion provided on the base member, The cover side locking portion includes a pair of first legs extending from the outside of the top plate toward the base member, and a first connecting portion connecting the end portions of the pair of first legs. The first base-side locking portion includes a first claw portion that locks to the first connection portion, and the second locking portion is a second cover-side locking portion provided to the cover, and And a second base-side locking portion provided on the base member, wherein the second cover-side locking portion is a pair of inner sides of the top plate portion and extending toward the base member from the side facing the fastening portion. And a second connecting portion connecting the end portions of the pair of second legs, the second base side locking It is characterized in that it comprises a second hook portion for engagement with the second connection portion.

The invention described in claim 14 is a controller provided with the cover sealing structure according to any one of claims 10 to 13 , wherein the base member includes a terminal including a plurality of conductive plate members. A control circuit for controlling the motor is formed on the base member while being disposed, and the cover covers an electrical connection portion between the power supply terminal of the motor and the terminal. It is characterized by

  According to the first aspect of the present invention, when the sealing material is formed with the parting line avoiding the position in contact with the cover wall and the base wall, the cover is attached to the base member via the sealing material. In addition, even when the seal material is crushed by the cover wall portion and the base wall portion, the airtightness when the cover is attached to the base member can be secured.

  According to the invention described in claim 2, the cover is attached to the base member in a state where the seal material is compressed in the radial direction of the cover wall portion and the base wall portion, the axis of the seal material (opening of annular seal member Since the seal material is crushed in the direction (radial direction of the seal material) orthogonal to the virtual line passing through the center, the cover can be prevented from rising from the base member. Further, by avoiding the cover from coming up from the base member, the cover and the base portion do not need to be provided with a large number of locking portions, so the degree of freedom of the layout of the cover can be enhanced.

  According to the invention described in claim 3, at least one of the cover wall portion and the base wall portion is a tapered portion which is inclined so as to avoid biting of the seal material when the cover is attached to the base member via the seal material. As a result, the sealing material can be prevented from being caught between the cover and the base member, so that the airtightness when the cover is attached to the base member can be easily ensured. In addition, since the time for eliminating the biting of the sealing material can be omitted, the working time can be shortened. Further, since a gap can be formed in the inclination direction of the tapered portion in the cover wall portion and the base wall portion, the presence or absence of the assembly of the sealing material can be visually confirmed.

  According to the invention described in claim 4, the cover can be firmly fixed to the base member by providing the cover and the base member with the floating preventing portion for preventing the cover from rising from the base member. Therefore, when the cover is attached to the base member via the seal member, the cover can be prevented from rising from the base member.

  According to the fifth aspect of the invention, the fastening member such as a bolt is used or the fixing means such as an adhesive is used by providing the locking portion for locking the cover to the base member by the floating preventing portion. As compared with the case, since the cover can be easily locked to the base member, the number of mounting steps can be reduced.

  According to the invention described in claim 6, the locking portion includes the cover-side locking portion provided on the cover and the base-side locking portion provided on the base member, and the cover-side locking portion is the top plate By including a pair of leg portions extending from the portion toward the base member and a connecting portion connecting the end portions of the pair of leg portions, the base side locking portion includes a claw portion locking to the connecting portion, The cover can be easily locked to the base member by hooking the connecting portion to the claw while utilizing the deflection of the leg. Further, by hooking the connecting portion to the claw portion, even when the cover receives a load toward the side opposite to one side of the thickness direction of the base member, the convex portion protruding from the end portion of the leg portion Compared to the structure in which the hook portion is hooked, the offset load on the connection portion (load to shift the connection portion in the direction perpendicular to the thickness direction, ie, load to remove the connection portion from the claw) is kept small It is possible to make the cover difficult to remove. Moreover, damage to the locking portion can be prevented by suppressing the offset load to the connecting portion.

  According to the invention described in claim 7, the connecting portion has a thick portion which is larger than the thickness of the pair of legs at a portion sandwiched by at least the pair of legs, whereby the thickness of the connecting portion can be increased. The breakage of the locking portion can be further prevented as compared to the case where the thickness of the leg portion is made the same.

According to the invention described in claim 10 , when the cover is attached to the base member in a configuration in which the controller and the motor are integrated by providing the housing with the motor connecting portion to which the motor is integrally connected. The air tightness of the

According to the invention described in claim 11 , the cover is disposed at a position covering a portion of the terminal and the fastening portion of the motor, thereby ensuring the airtightness of the portion of the terminal and the fastening portion of the motor can do.

According to the invention described in claim 12 , the locking portion includes a first locking portion provided on the outer side of the cover, and a second locking portion provided on the inner side of the cover and facing the fastening portion. Thus, the cover can be firmly fixed to the base member as compared with the case where the locking portion is provided only on either the outer side or the inner side of the cover. Therefore, when the cover is attached to the base member via the seal member, the cover can be further prevented from rising from the base member.

According to the invention described in claim 13 , the first locking portion includes the first cover-side locking portion provided on the cover and the first base-side locking portion provided on the base member, and the first cover is provided. The side locking portion includes a pair of first legs extending from the outside of the top plate toward the base member, and a first connecting portion connecting the end portions of the pair of first legs, the first base side The locking portion includes a first hook portion locking to the first connection portion, and a second locking portion is provided on the cover, and the second cover side locking portion provided on the base member A pair of second leg portions including a stop portion, the second cover side locking portion extending from the side facing the fastening portion on the inner side of the top plate portion, and the distal end of the pair of second leg portions Deflection of the first leg by providing a second connection portion connecting the two parts and the second base side locking portion includes a second hook portion locking to the second connection portion The cover is easily locked to the base member by hooking the first connection part to the first claw part while utilizing the deflection of the second leg and hooking the second connection part to the second claw part. Can. In addition, by hooking the first connection portion and the second connection portion to the first claw portion and the second claw portion, respectively, the first connection portion and the second connection portion can be compared with the case where only one connection portion is hooked to the claw portion. Since the offset load on the two connecting portions can be kept small, it is possible to make the cover more difficult to remove. Further, breakage of the locking portion can be further prevented by suppressing the offset load to the first connecting portion and the second connecting portion to a small value.

According to the invention described in claim 14 , even in the controller provided with the cover sealing structure, the airtightness when the cover is attached to the base member can be secured.

It is the figure which looked at the electric motor provided with the controller which concerns on embodiment of this invention from one side of the motor axial direction. It is the figure which looked at the said electric motor from the other side of the motor axial direction. It is the III-III sectional view of FIG. It is the figure which looked at the bus-bar module in the said controller from the 1st surface side of a base member. It is a disassembled perspective view for demonstrating the connection structure of the said bus-bar module and a housing | casing. It is a perspective view which shows the terminal cover in the said controller with a sealing material. It is the figure which looked at the said terminal cover from the other side of the motor axial direction. It is the perspective view which looked at FIG. 7 from arrow VIII. It is sectional drawing which cut | disconnected the sealing material provided between the said base member and the said terminal cover in the surface orthogonal to the circumferential direction of a sealing material. It is sectional drawing corresponded in FIG. 9 which shows the modification of the said sealing material. It is a principal part enlarged view of FIG. It is a principal part enlarged view of FIG. It is a perspective view for demonstrating the effect | action of the cooling air when forcedly air-cooling the said controller. It is a perspective view for demonstrating the effect | action of a cooling wind following FIG. It is a schematic diagram for demonstrating the effect | action of the latching | locking part which concerns on a comparative example. It is a schematic diagram for demonstrating the effect | action of the latching | locking part which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<Whole electric motor>
1 to 3 show an example of an electric motor 1 provided with a controller 3 according to an embodiment.
The electric motor 1 includes a brushless motor 2 (driven body) and a controller 3 for controlling the brushless motor 2.
In addition, the code | symbol CL shows the axis line of the output shaft 20 of the brushless motor 2 in the figure. Hereinafter, the direction along the axis line CL is referred to as “motor axis direction”, the direction orthogonal to the axis line CL is referred to as “motor radial direction”, and the direction around the axis line CL is referred to as “motor circumferential direction”.
Further, in the drawing, a symbol V1 indicates one side in the motor axial direction, and a symbol V2 indicates the other side in the motor axial direction.

<Brushless motor>
With reference to FIGS. 2 and 3, the brushless motor 2 can generate an output shaft 20 forming an axis line CL, a rotor 21 rotatable with the output shaft 20, and a magnetic field for rotating the rotor 21 with the output shaft 20. And a stationary stator 22.

  The rotor 21 has a disk-like bottom wall 21a, and a cylindrical peripheral wall 21b extending from the outer peripheral end of the bottom wall 21a to one side V1 in the motor axial direction and forming an opening 21i on the one side V1 in the motor axial direction. A radially extending flange portion 21d is provided at an end of the peripheral wall 21b on the opening 21i side. A cylindrical boss 21 h through which the output shaft 20 is inserted is formed at a radial center of the bottom wall 21 a. For example, by press-fitting the output shaft 20 to the boss portion 21 h, the rotor 21 can be rotated together with the output shaft 20. A plurality of rotor magnets 21c are provided on the radially inner side surface of the peripheral wall 21b with an adhesive or the like. The rotor 21 is rotatable with the output shaft 20 in response to the magnetic field generated by the stator 22.

  The stator 22 is disposed radially inward of the peripheral wall 21 b of the rotor 21. The stator 22 is fixed to the housing 8 of the controller 3 by bolts 22 d. A bearing holder 24 in which a pair of bearings 23 functioning as a bearing of the output shaft 20 is fitted is provided radially inside the stator 22 and fixed together with the stator 22 by a bolt 22 d.

  The stator 22 is provided on a cylindrical stator core 22a, insulating insulators 22b mounted on both sides in the motor axial direction with respect to a plurality of teeth portions protruding radially outward from the stator core 22a, and insulators 22b. And a conductive coil 22c to be wound. The coil 22c corresponds to three phases of U phase, V phase and W phase. The brushless motor 2 of the present embodiment is a three-phase brushless motor provided with U-phase, V-phase, and W-phase three-phase coils 22c.

  The end of the coil 22c is drawn out from the side of the opening 21i of the rotor 21 and connected to the bus bar unit 25 disposed on the side of the opening 21i so as to penetrate the opening 80m of the housing 8. The bus bar unit 25 has a function of supplying power from the outside to the coil 22c. For example, the bus bar unit 25 is connected to the U-phase bus bar, the V-phase bus bar and the W-phase bus bar connected with the winding start end (not shown) of the coil 22c of each phase, and the winding end of the coil 22c of each phase ( And a neutral point bus bar to be connected. Among the bus bars, the U-W phase bus bar includes three power feeding terminals 25 a extending from the opening 21 i toward the controller 3 along the motor axial direction. Each feed terminal 25a is electrically connected to the motor side end 125 (see FIG. 4) of the three-phase bus bar disposed in the base member 5 by resistance welding or the like.

<Controller>
Referring to FIG. 4, controller 3 is electrically connected to terminal 4 including a plurality of bus bars 100 (conductive plate members), base member 5 made of resin on which terminals 4 are disposed, and a plurality of bus bars 100. A plurality of electronic elements 62 to 66 (see FIG. 5), a power device 7 for supplying electric power to the brushless motor 2 and controlling the drive of the brushless motor 2, and a housing 8 attached to the base member 5 (see FIG. 3) And covers 9 and 10 (body cover 9 and terminal cover 10) covering the base member 5. A control circuit for controlling the brushless motor 2 is configured on the base member 5.
In FIG. 4, the housing 8 and the covers 9 and 10 are omitted for the sake of convenience. In the figure, reference numeral 30 denotes an insert-molded component (hereinafter referred to as a "bus bar module") in which a plurality of bus bars 100 are disposed in a portion of the controller 3 excluding the housing 8 and the covers 9 and 10. ).

<Base member>
The base member 5 includes a base main body 50 having a thickness in the motor axial direction and having a rectangular plate shape in a plan view as viewed from the motor axial direction. The base body 50 has a first side 50a, a second side 50b opposite to the first side 50a, a third side 50c orthogonal to the first side 50a and the second side 50b, and a first side 50a in plan view. And a fifth side 50e opposite to the fourth side 50d and inclined adjacent to the second side 50b.

  Hereinafter, one side in the thickness direction of the base member 5 is referred to as “first surface side”, and the side opposite to the first surface side of the base member 5 is referred to as “second surface side”. The “first surface side” corresponds to one side of the base member 5 in the motor axial direction, and the “second surface side” corresponds to the other side of the base member 5 in the motor axial direction.

  The base member 5 has a first connector 51 and a second connector 52 protruding from the third side 50c of the base body 50 in a plan view, and a terminal connection portion 53 protruding from the opposite side to the third side 50c of the base body 50. And further comprising For example, as for base member 5, a plurality of bus bars 100 are arranged inside by insert molding using insulating materials, such as resin.

Between the base main body 50 and the terminal connection portion 53, a flange extending along the fourth side 50d and the fifth side 50e in plan view and extending along the outer periphery of the terminal connection portion 53. Portions 50f are formed.
In the base main body 50, a flange portion 50g having a triangular shape having corner rounds at the top in a plan view is formed at the corner where the first side 50a and the second side 50b intersect the third side 50c.
Through holes 50 h opening in the thickness direction of the base member 5 are formed in the flanges 50 f and 50 g.
In the terminal connection portion 53, an opening 53h opened in the thickness direction of the base member 5 is formed at a position facing the output shaft 20.

<Case>
Referring also to FIG. 5, the housing 8 includes a housing main body 80 having a shape along the outer shape of the base main body 50 in the motor axial direction, and a motor connecting portion 81 having a shape following the outer shape of the terminal connection portion 53. And a motor bracket 82 having a shape conforming to the outer shape of the brushless motor 2. For example, the housing 8 is formed of a heat conductive metal material such as aluminum.

<Case body>
With reference to FIGS. 1 to 3 together, the case body 80 protrudes outward in the width direction from both widthwise end portions of the body base portion 80a having a flat surface on the other side in the motor axial direction and the body base portion 80a. Of a plurality of (for example, two in total in the width direction in the present embodiment) flange portions 80b and a plurality of pin-type heat radiation projecting toward the other side in the motor axial direction on the surface of the main body base portion 80a Connecting ribs 80d linearly extending so as to connect between the fins 80c and the plurality of adjacent heat radiation fins 80c in FIG. 2 and a plurality of projections projecting outward in the width direction from both widthwise ends of the main body base 80a. And a radiation fin 80e of the type. In the flange portion 80b, a through hole 80h opened in the motor axial direction is formed.

<Motor connection part>
The motor connecting portion 81 is formed with an opening 81 h opening in the motor axial direction. At a portion of the motor connecting portion 81 facing the opening 81 h, a motor connecting boss portion 81 a to which the brushless motor 2 is integrally connected is provided.

<Motor bracket part>
The motor bracket portion 82 has a base portion 82a having a flat surface on one side in the motor axial direction, and a plurality of (for example, three in the present embodiment) flanges projecting outward in the motor radial direction from the outer peripheral portion of the base portion 82a. A portion 82b and a plurality of pin-type heat dissipating fins 82c protruding toward one side in the motor axial direction on the surface of the base portion 82a. In the flange portion 82b, a through hole 82h opened in the motor axial direction is formed.

<Cooling structure>
Referring to FIG. 13 and FIG. 14 together, wind is sent to the member to be cooled R by a fan member (not shown) attached to the output shaft 20 of the brushless motor 2. The code | symbol W in the figure shows the flow of the main wind sent to the member R to be cooled.
The fan member sends the wind toward one side in the motor axial direction. A part W1 of the wind from the fan member hits one surface of the main body base 80a, the plurality of pin-type heat dissipating fins 80c, the connection rib 80d, and the plurality of convex shaped heat dissipating fins 80e. Further, most of the wind W from the fan member reaches the side of the main body base portion 80a, and then reaches the member to be cooled R to cool the member to be cooled R. On the other hand, a part of the wind W2 from the fan member is diverted toward the base portion 82a by the air guide plate 95 mounted between the unshown shroud and the controller 3. Then, the wind W3 whose course is changed is applied to one surface of the base portion 82a and the plurality of pin-type heat dissipating fins 82c to cause air in the heat dissipating fins 82c to convect and further increase the heat dissipating effect of the heat dissipating fins 82c. be able to.

Further, the plurality of pin-type radiation fins 80 project from the surface of the main body base portion 80a toward the other side in the motor axial direction, so that the wind from the fan member sent toward one side in the motor axial direction is generated. It can rectify efficiently on the surface of main part base part 80a.
In addition, the connection rib 80d extends in a straight line so as to connect the plurality of heat radiation fins 80c, thereby increasing the heat radiation area of the main body base portion 80a as compared with the case where only the pin type heat radiation fins are provided. it can. Further, as compared with the case where only the pin-type heat dissipating fins are provided, the main body base portion 80a can be easily removed from the mold, so that the productivity can be improved. Furthermore, the size of the pin-type radiation fin 80 can be reduced.
Further, the plurality of convex heat dissipating fins 80e protrude outward in the width direction from both widthwise end portions of the main body base 80a, as compared with the case where only the pin type heat dissipating fins are provided. The heat dissipation area can be increased.
In addition, since the water droplets attached to the housing body 80 are guided vertically downward along the connection rib 80d, the waterproofness of the brushless motor 2 can also be enhanced.

<Base member mounting portion>
Referring also to FIG. 5, a base member attachment portion 80 f is formed between the housing main body 80 and the motor connection portion 81 at a portion facing the flange portion 50 f of the base member 5 in the motor axial direction.
A base member attaching portion 80g is formed in the case main body 80 at a portion facing the flange portion 50g of the base member 5 in the motor axial direction.
Mounting holes 80k are formed in the axial direction of the motor in the base member mounting portions 80f and 80g.

  For example, the base member 5 is obtained by inserting the bolt 18 into the through holes 50 h of the flanges 50 f and 50 g of the base member 5 and screwing the bolts 18 into the mounting holes 80 k of the base member attachment portions 80 f and 80 g of the housing 8. Can be fastened and fixed to the housing 8.

<Main body cover>
With reference to FIG. 1 and FIG. 5 together, the main body cover 9 has a rectangular shape along the outer shape of the base main body 50 when viewed from the motor axial direction. The main body cover 9 approaches the base main body 50 from one side in the plate thickness direction and covers the base main body 50. The "one side in the plate thickness direction" corresponds to one side in the motor axial direction.

  A body cover 9 has a top plate portion 90 covering the base body 50 from one side in the thickness direction, and a rectangular ring standing up from the top plate portion 90 toward the base body 50 and surrounding the base body 50 when viewed from the motor axial direction. And the cover wall portion 91 of FIG.

The top plate portion 90 is provided with a locking portion 92 for locking the main body cover 9 to the base main body 50. A plurality of locking portions 92 are provided at both end portions in the width direction of the top plate portion 90 (for example, a total of four at the both ends in the width direction in the present embodiment).
The locking portion 92 includes a pair of leg portions 92a extending from the top plate portion 90 toward the base main body 50, and a connecting portion 92b connecting end portions of the pair of leg portions 92a.
The base main body 50 is provided with a claw portion 50 j which is engaged with the connecting portion 92 b of the engaging portion 92 from one side in the plate thickness direction. A plurality of claws 50 j are provided at both widthwise end portions of the base main body 50 (for example, two each at both ends in the widthwise direction in the present embodiment) so as to face the locking portions 92 of the main body cover 9.

<Terminal cover>
With reference to FIG. 1 and FIG. 3 together, the terminal cover 10 has a shape along the outer shape of the terminal connection portion 53 when viewed from the motor axial direction. The terminal cover 10 approaches the terminal connection 53 from one side in the thickness direction and covers the terminal connection 53. The terminal cover 10 is disposed at a position covering the motor side end 125 of the three-phase bus bar disposed on the base member 5 and the fastening portion 20j of the output shaft 20, and corresponds to the three feed terminals 25a of the brushless motor 2. Cover the electrical connection with the motor-side end 125. An annular seal member 40 is provided between the terminal connection portion 53 and the terminal cover 10.
Here, the terminal cover corresponds to the "cover" described in the claims. Also, the terminal connection portion corresponds to "part of the base member" described in the claims. Further, the motor side end 125 of the three-phase bus bar disposed in the base member 5 corresponds to “a part of the terminal” described in the claims. Further, the fastening portion 20 j of the output shaft 20 corresponds to the “fastening portion of the motor” described in the claims.

Referring to FIG. 6 and FIG. 11 together, the terminal cover 10 stands up from the top plate portion 11 covering the terminal connection portion 53 from one side in the plate thickness direction, and from the top plate portion 11 toward the terminal connection portion 53. And an annular cover wall 12 surrounding the terminal connection portion 53 when viewed in the thickness direction.
The terminal connection portion 53 includes an annular base wall portion 53 a in contact with the outer peripheral side of the cover wall portion 12 via the sealing material 40. The terminal connection portion 53 may be provided with an annular base wall portion in contact with the inner peripheral side of the cover wall portion 12 via the sealing material 40.

<Cover wall>
The cover wall portion 12 stands up from the top plate portion 11 toward the terminal connection portion 53, and on the outside of the first wall portion 12a, an annular first wall portion 12a surrounding the terminal connection portion 53 when viewed from the thickness direction. An annular seal wall 12b that protrudes toward and faces one side of the sealing material 40 in the plate thickness direction when viewed from the plate thickness direction, and an end portion of the first wall 12a (a radially inner end of the seal wall 12b And an annular second wall portion 12c which is in contact with the inner peripheral side of the base wall portion 53a via the seal member 40 when viewed from the thickness direction.

  Referring also to FIG. 12, the second wall 12c is formed with a cover-side sealing surface 12s in contact with the inner peripheral side of the sealing material 40, and the base wall 53a is a base-side seal in contact with the outer peripheral side of the sealing material 40. The surface 53s is formed. The cover-side sealing surface 12s and the base-side sealing surface 53s are annular as viewed from the thickness direction, and extend linearly in parallel to the thickness direction in a cross-sectional view of FIG.

  The end of the second wall 12c (the end on the terminal connection 53 side) is flat in contact with the flat bottom surface 53f of the groove of the terminal connection 53 when the terminal cover 10 is locked to the terminal connection 53. An abutting surface 12f is formed.

<Sealing material>
Referring also to FIG. 9, the seal member 40 includes a seal body 40a having a circular cross section and a plurality (for example, three in the present embodiment) of parting lines 40b projecting radially outward of the seal body 40a. Equipped with The seal member 40 is formed of an elastically deformable member. Each parting line 40b is formed at a position avoiding a position in contact with the cover wall 12 and the base wall 53a on the outer peripheral surface of the seal body 40a. For example, the formation position of the parting line 40b is set using a mold having a slide structure.

The sealing material 40 contains oil for preventing friction.
Thereby, when the seal member 40 is assembled between the cover wall 12 and the base wall 53a, the seal 40 can be prevented from twisting.

The number of arrangement of the party lines is not limited to three.
For example, as in the seal member 41 shown in FIG. 10, two parting lines 41b may be provided which protrude outward in the radial direction of the seal main body 41a having a circular shape in cross section. The parting lines 41b are disposed at opposing positions across the seal body 41a.
Further, the arrangement position of the parting line is not limited to this, and it may be formed avoiding the position in contact with the cover wall 12 and the base wall 53a.
Also, the cross-sectional shape of the seal body is not limited to a circle. For example, the cross-sectional shape of the seal body may be elliptical, or may be polygonal, such as triangular or square.

Referring also to FIG. 12, the terminal cover 10 is attached to the terminal connection portion 53 in a state in which the sealing material 40 is compressed in the radial direction of the cover wall portion 12 and the base wall portion 53 a.
The radial direction of the cover wall 12 and the base wall 53a corresponds to the direction orthogonal to the thickness direction (the direction in which the cover wall 12 and the base wall 53a are opposed).

<Taper part>
When the terminal cover 10 is attached to the terminal connection portion 53 via the seal member 40, the cover wall portion 12 and the base wall portion 53a are tapered such that the seal portions 40 are inclined to avoid biting of the seal member 40 (cover The side taper portion 12t and the base side wall portion 53t are respectively formed.

The cover-side tapered portion 12t has an annular shape when viewed from the thickness direction, and is at a radially outer portion of the seal wall portion 12b and at a portion facing the seal member 40 with respect to the cover-side seal surface 12s in a sectional view of FIG. It is formed to be inclined.
The base-side tapered portion 53t has an annular shape as viewed from the thickness direction, and the base-side sealing surface in a cross-sectional view of FIG. 12 at one side of the base wall 53a in the thickness direction and facing the cover-side tapered portion 12t It is formed to be inclined with respect to 53s.

<Terminal cover lift prevention part>
The terminal cover 10 and the terminal connection portion 53 are provided with a terminal cover lift prevention portion 150 for preventing the terminal cover 10 from rising from the terminal connection portion 53. The terminal cover lifting prevention portion 150 is a first locking portion 151 provided on the outside of the terminal cover 10 as a locking portion for locking the terminal cover 10 to the terminal connection portion 53, and an output shaft inside the terminal cover 10 And a second locking portion 152 provided on the side facing the fastening portion 20j.
The terminal cover lifting prevention portion 150 is not limited to the locking portions 151 and 152, and a fastening member such as a bolt may be provided, or a fixing means such as an adhesive may be used.
Here, the terminal cover lifting prevention portion corresponds to the "lifting prevention portion" described in the claims. The first locking portion and the second locking portion correspond to the "locking portion" described in the claims.

The first locking portion 151 includes a first cover-side locking portion 13 provided on the terminal cover 10, and a first claw portion 53j as a first base-side locking portion provided on the terminal connection portion 53 side.
The first cover side locking portion 13 connects the pair of first legs 13a extending from the outside of the top plate 11 toward the terminal connection portion 53 with the end of the pair of first legs 13a. And a unit 13b. The first claw portion 53 j is engaged with the first connecting portion 13 b of the first cover side engaging portion 13 from one side in the plate thickness direction.
The second locking portion 152 includes a second cover-side locking portion 14 provided on the terminal cover 10, and a second hook portion 53k as a second base-side locking portion provided on the terminal connection portion 53 side.
The second cover-side locking portion 14 is a pair of second legs 14 a extending toward the terminal connection portion 53 from the side facing the fastening portion 20 j of the output shaft 20 inside the top plate portion 11, and a pair of second legs 14 a And a second connecting portion 14b connecting the end portions of the legs 14a. The second claw portion 53k is engaged with the second connection portion 14b of the second cover side engagement portion 14 from one side in the plate thickness direction.
Here, the first cover-side locking portion and the second cover-side locking portion correspond to the “cover-side locking portion” described in the claims. Further, the first base-side locking portion and the second base-side locking portion correspond to the “base-side locking portion” described in the claims. The first leg and the second leg correspond to the "leg" recited in the claims. Moreover, a 1st connection part and a 2nd connection part correspond to the "connection part" as described in a claim. Moreover, a 1st nail | claw part and a 2nd nail | claw part correspond to the "nail part" as described in a claim.

The base end of the pair of first legs 13a (part near the top plate 11) and the portion of the cover wall 12 sandwiched by the first wall 12a and the seal wall 12b extend in the thickness direction A pair of ribs 13d is formed.
On the proximal end side of the pair of first legs 13a, a curved portion 13e that curves in an arc shape in a cross-sectional view of FIG. 11 is formed.
Referring also to FIG. 8, the base end portions 14 d (portions near the top plate portion 11) of the pair of second legs 14 a have a thickness greater than that of the main portions of the pair of second legs 14 a and are It is connected to the plate portion 11.

The first connection portion 13b is formed with a flat contact portion 13f that contacts the flat locking surface of the first claw portion 53j. In the first connecting portion 13b, a tapered portion 13g is formed to be inclined with respect to the thickness direction in the cross-sectional view of FIG. At a portion of the first claw portion 53j facing the first cover side locking portion 13, a tapered portion 53q which is inclined with respect to the thickness direction in a cross sectional view of FIG. 11 is formed.
The second connection portion 14b is formed with a flat contact portion 14f that contacts the flat locking surface of the second hook portion 53k. The second connecting portion 14b is formed with a tapered portion 14g which is inclined with respect to the thickness direction in the sectional view of FIG. A tapered portion 53r that is inclined with respect to the thickness direction in the cross-sectional view of FIG.

<Thickness part>
The first connecting portion 13 b has a thick portion 13 c larger than the pair of first legs 13 a at a portion sandwiched by the pair of first legs 13 a. The thick portion 13c is formed on the outer side of the first connection portion 13b, and is not formed on the inner side of the first connection portion 13b (the surface on which the first claw portion 53i in the terminal connection portion 53 is formed).
The thick portion 13c may be formed at a portion extending across the pair of first legs 13a. That is, the thick portion 13c may be formed at a portion sandwiched by at least the pair of first legs 13a.

The second connecting portion 14 b has a thick portion 14 c larger than the pair of second legs 14 a in a portion straddling the pair of second legs 14 a. The thick portion 14c is formed on the outer side of the second connection portion 14b, and is not formed on the inner side of the second connection portion 14b (the surface on which the second claw portion 53k of the terminal connection portion 53 is formed).
The thick portion 14c may be formed at a portion sandwiched between the pair of second legs 14a. That is, the thick portion 14c may be formed at a portion sandwiched by at least the pair of second legs 14a.

<Rib>
Referring also to FIG. 7, a plurality of (for example, four in the present embodiment) ribs 15 extending in the plate thickness direction are formed on the radially inner side of the cover wall 12. The number of ribs 15 is not limited to four.

  An arc-shaped wall portion 16 is formed on the inner side in the plate thickness direction of the top plate portion 11 so as to face the fastening portion 20j of the output shaft 20 as viewed from the plate thickness direction extending in the plate thickness direction. On the inner side in the plate thickness direction of the top plate portion 11, a rib 17 extending in the radial direction inner side of the wall portion 16 and extending to surround the second cover side locking portion 14 and reaching the radially inner end of the cover wall portion 12 It is formed.

  Referring also to FIG. 12, the rib 15 is disposed between the second wall 12 c and the wall 53 b rising from the terminal connection 53 toward one side in the plate thickness direction. Thus, even when the terminal cover 10 is brought close to the terminal connection portion 53 from the side inclined with respect to the thickness direction, the mounting position of the terminal cover 10 with respect to the terminal connection portion 53 can be regulated. Further, even if an error occurs in the distance between the cover wall 12 and the base wall 53a, the distance can be narrowed by the rib 15, so that the terminal cover 10 can be attached to the terminal connection portion 53. Accuracy can be improved.

  As described above, in the above-described embodiment, the base member 5, the terminal cover 10 covering the terminal connection portion 53 of the base member 5, and the annular seal member 40 provided between the base member 5 and the terminal cover 10 The terminal cover 10 has a top plate 11 covering the terminal connection portion 53, and an annular ring which stands from the top plate 11 toward the base member 5 and surrounds the terminal connection portion 53. The base member 5 includes an annular base wall 53a in contact with the inner or outer peripheral side of the cover wall 12 via the sealing material 40. The sealing material 40 includes the cover wall A parting line 40b is formed avoiding a position in contact with the base 12 and the base wall 53a.

  According to this configuration, the sealing member 40 is formed with the parting line 40 b avoiding the position in contact with the cover wall portion 12 and the base wall portion 53 a so that the terminal cover 10 can be formed on the base member 5 via the sealing member 40. Even when the sealing member 40 is crushed by the cover wall portion 12 and the base wall portion 53a when attaching the terminal cover 10, the airtightness when the terminal cover 10 is attached to the base member 5 can be secured.

  Further, in the above embodiment, the terminal cover 10 is attached to the base member 5 in a state where the sealing material 40 is compressed in the radial direction of the cover wall 12 and the base wall 53a, the axial line of the sealing material 40 (annular seal Since the sealing material 40 is crushed in a direction (radial direction of the sealing material) orthogonal to the imaginary line passing through the opening center of the material 40, the terminal cover 10 can be prevented from rising from the base member 5. Further, by avoiding the terminal cover 10 rising from the base member 5, there is no need to provide a large number of locking portions on the terminal cover 10 and the base portion 5, so that the degree of freedom of the cover layout can be enhanced.

Further, in the above embodiment, when the terminal cover 10 is attached to the base member 5 via the seal member 40 on each of the cover wall 12 and the base wall 53 a, the seal material between the terminal cover 10 and the base member 5 By forming the tapered portions 12t and 53t which incline so as to avoid the biting of 40, the biting of the sealing material 40 can be prevented, so the airtightness when the terminal cover 10 is attached to the base member 5 Can be easily secured. Moreover, since the time for eliminating the biting of the sealing material 40 can be omitted, the working time can be shortened.
Also, in the case of a structure that generally seals in the compression direction, it is necessary to secure a compression margin for compressing the seal material in each of the cover and the base member, so that the seal material is difficult to see after assembly. In the present embodiment, since gaps can be formed in the inclined direction of the tapered portions 12t and 53t in the cover wall 12 and the base wall 53a, the presence or absence of the assembly of the sealing material 40 is visually checked. It can be confirmed.

  Further, in the above embodiment, the terminal cover 10 and the base member 5 are provided with the floating preventing portion 150 for preventing the terminal cover 10 from rising from the base member 5 so that the terminal cover 10 can be made rigid to the base member 5. It can be fixed. Therefore, when the terminal cover 10 is attached to the base member 5 via the seal member 40, the terminal cover 10 can be prevented from rising from the base member 5.

  Further, in the above embodiment, the floating preventing portion 150 includes the locking portions 151 and 152 for locking the terminal cover 10 to the base member 5, thereby using a fastening member such as a bolt or a fixing means such as an adhesive. Since the terminal cover 10 can be easily locked to the base member 5 as compared to the case of use, the number of mounting steps can be reduced.

In the above embodiment, the locking portion 151 includes the cover-side locking portion 13 provided on the terminal cover 10 and the claw portion 53 j as the base-side locking portion provided on the base member 5. The stopper 13 includes a pair of legs 13a extending from the top plate 11 toward the base member 5 and a connector 13b for connecting the end of the pair of legs 13a, and the claw 53j is a connector 13b. The terminal cover 10 can be easily locked to the base member 5 by hooking the connecting portion 13b to the claw portion 53j by using the deflection of the leg portion 13a by locking from one side in the plate thickness direction. it can.
Further, referring to FIG. 15 and FIG. 16 together, the case where the terminal cover 10 receives the load F toward the side opposite to the one side in the thickness direction by hooking the connecting portion 13 b to the claw portion 53 j However, compared with the configuration in which the protrusion 13bX protruding from the end of the leg 13X is hooked to the claw 53jX, the offset load on the connection 13b (to shift the connection 13b in the direction orthogonal to the thickness direction) The load, that is, the load for removing the connecting portion 13b from the claw portion 53j can be kept small, so that the terminal cover 10 can be made difficult to be removed. Moreover, damage to the locking portion 151 can be prevented by suppressing the offset load on the connecting portion 13 b to a small value. Reference symbols F1 to F3 in FIG. 15 indicate component forces when the convex portion 13bX according to the comparative example receives the load F.

  Further, in the above embodiment, the connecting portion 13b has the thick portion 13c larger than the thickness of the pair of legs 13a at a portion sandwiched by at least the pair of legs 13a. The breakage of the locking portion 151 can be further prevented as compared with the case where the thickness of the leg portion 13a is the same.

  Further, in the above embodiment, the housing 8 includes the motor connecting portion 81 to which the brushless motor 2 is integrally connected, so that the terminal cover 10 can be used as a base in a configuration in which the controller 3 and the brushless motor 2 are integrated. Airtightness when attached to the member 5 can be ensured.

  Further, in the above embodiment, the terminal cover 10 is disposed at a position covering the motor side end portion 125 of the three-phase bus bar disposed on the base member 5 and the fastening portion 20 j of the output shaft 20 of the brushless motor 2. Thus, the airtightness of the motor side end 125 and the fastening portion 20j of the output shaft 20 can be secured.

  Further, in the above embodiment, the locking portion 150 is the first locking portion 151 provided on the outer side of the terminal cover 10, and the second locking portion provided on the inner side of the terminal cover 10 and facing the fastening portion 20j. By providing 152, the terminal cover 10 can be firmly fixed to the base member 5 as compared with the case where the locking portion is provided on only one of the outer side and the inner side of the terminal cover 10. Therefore, when the terminal cover 10 is attached to the base member 5 via the seal member 40, the terminal cover 10 can be further prevented from rising from the base member 5.

In the above embodiment, the first locking portion 151 is provided on the first cover side locking portion 13 provided on the terminal cover 10 and the first hook portion serving as the first base side locking portion provided on the base member 5. 53 j, and the first cover side locking portion 13 connects the pair of first legs 13 a extending from the outside of the top plate 11 toward the base member 5 and the end portions of the pair of first legs 13 a And the first hook 53b is engaged with the first joint 13b from one side in the plate thickness direction, and the second hook 152 is provided on the terminal cover 10 The cover side locking portion 14 and a second hook portion 53k as a second base side locking portion provided on the base member 5 are provided, and the second cover side locking portion 14 is inside the top plate portion 11 and A pair of second legs 14 extending toward the base member 5 from the side facing the fastening portion 20 j And the second connection portion 14b connecting the end portions of the pair of second legs 14a, and the second claw portion 53k is engaged with the second connection portion 14b from one side in the plate thickness direction, Hooking the first connecting portion 13b to the first claw portion 53j while using the bending of the first leg 13a and hooking the second connecting portion 14b to the second claw portion 53k while using the bending of the second leg 14a Thus, the terminal cover 10 can be easily locked to the base member 5. In addition, by hooking the first connecting portion 13b and the second connecting portion 14b to the first claw portion 53j and the second claw portion 53k, respectively, as compared with the case where only one connecting portion is hooked to the claw portion, the first Since the offset load on the connecting portion 13b and the second connecting portion 14b can be suppressed to a small value, the terminal cover 10 can be made more difficult to remove. Further, breakage of the locking portion 150 can be further prevented by suppressing the offset load to the first connecting portion 13 b and the second connecting portion 14 b to a small value.
Furthermore, by forming the curved portion 13e on the base end side of the first leg 13a, the bending action of the first leg 13a can be effectively exhibited using the curved portion 13e. .
In addition, a flat contact portion 13f is formed on the first connection portion 13b to be in contact with the flat engagement surface of the first hook portion 53j, and a flat engagement of the second hook portion 53k is formed on the second connection portion 14b. By forming the flat contact portion 14f in contact with the surface, the flat contact portion 13f of the first connection portion 13b is brought into contact with the flat engagement surface of the first claw portion 53j and the second connection portion is formed. Since the flat contact portion 14f of 14b can be brought into contact with the flat locking surface of the second claw portion 53k, the terminal cover 10 can be stably locked to the base member 5.
Further, the first connecting portion 13b is formed with a tapered portion 13g which is inclined with respect to the thickness direction, and the second connecting portion 14b is formed with a tapered portion 14g which is inclined with respect to the thickness direction. The terminal cover 10 can slide the first claw portion 53 j along the tapered portion 13 g of the one coupling portion 13 b and the second claw portion 53 k along the tapered portion 14 g of the second coupling portion 14 b. Of the first leg 13a and the second leg 14a can be effectively exhibited.
Further, a tapered portion 53q which is inclined with respect to the thickness direction is formed at a portion of the first claw portion 53j facing the first cover side locking portion 13, and the second cover side locking portion 14 of the second claw portion 53k is formed. A tapered portion 53r that is inclined with respect to the thickness direction is formed at a portion facing the plate, thereby sliding along the tapered portion 53q of the first claw portion 53j and along the tapered portion 53r of the second claw portion 53k. Therefore, the terminal cover 10 can be more easily locked to the base member 5, and the action of the deflection of the first leg 13a and the second leg 14a can be more effectively exhibited. .

  Further, in the controller 3 having the cover sealing structure, the airtightness when the cover is attached to the base member 5 can be secured.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

  Further, in the above embodiment, the connection between the bus bar 100 and the electronic component 6 and the power device 7 is performed by resistance welding, but the connection is not limited to this. For example, the connection may be performed by arc welding such as TIG welding or laser welding. .

  Further, the materials, shapes, and the like of the base member 5, the housing 8, the main body cover 9, the terminal cover 10, the brushless motor 2, the bus bar 100, and the like are not limited to the above embodiment. For example, the bus bar 100 may be formed of aluminum. Alternatively, the housing 8 may be formed of a metal material such as iron (carbon steel).

  In addition, without departing from the spirit of the present invention, it is possible to replace components in the above-described embodiment with known components as appropriate.

2 Brushless motor (motor)
Reference Signs List 3 controller 4 terminal 5 base member 8 housing 10 terminal cover (cover)
11 top plate 12 cover wall 12t cover side taper (taper)
13 First cover side locking part (cover side locking part)
13a First leg (leg)
13b First connection part (connection part)
13c, 14c thick-walled portion 14 second cover side locking portion (cover side locking portion)
14a Second leg (leg)
14b Second connection part (connection part)
20j Fastening part 25a Feeding terminal 40, 41 Sealing material 40b, 41b Parting line 53a Base wall part 53j First claw part (nail part)
53k second nail (nail)
53t Base side taper part (taper part)
150 Lifting Prevention Part 151 First Locking Part (Locking Part)
152 Second Locking Part (Locking Part)
81a Motor connection part 100 bus bar (conductive plate material)

Claims (14)

A sealing structure of a cover comprising a base member, a cover covering a part of the base member, and an annular seal member provided between the base member and the cover,
The cover includes a top plate portion covering the portion, and an annular cover wall portion rising from the top plate portion toward the base member and surrounding the portion.
The base member has an annular first base wall portion in contact with the inner peripheral side or the outer peripheral side of the cover wall portion via the seal material, and the first base wall portion in a radial direction sandwiching the seal material. And a second base wall provided on the opposite side ,
A parting line is formed on the sealing material, avoiding a position in contact with the cover wall and the first base wall .
The cover wall portion includes a plurality of ribs which are provided on the side opposite to the side where the seal material is provided in the cover wall portion in the radial direction, and extend in the thickness direction.
The sealing structure of a cover, wherein the rib is disposed between the cover wall and the second base wall .   The cover sealing structure according to claim 1, wherein the cover is attached to the base member in a state in which the sealing material is compressed in a radial direction of the cover wall and the base wall. The cover wall portion and the base wall portion are characterized in that a tapered portion is formed so as to avoid biting of the seal material when the cover is attached to the base member via the seal material. The sealing structure of the cover according to claim 1 or 2.   The cover sealing structure according to any one of claims 1 to 3, wherein the cover and the base member are provided with a floating preventing portion that prevents the cover from floating from the base member. .   5. The cover sealing structure according to claim 4, wherein the lifting prevention portion includes a locking portion that locks the cover to the base member. The locking portion includes a cover-side locking portion provided on the cover and a base-side locking portion provided on the base member,
The cover-side locking portion includes a pair of leg portions extending from the top plate portion toward the base member, and a connection portion connecting end portions of the pair of leg portions.
The cover sealing structure according to claim 5, wherein the base-side locking portion includes a claw portion that locks to the connection portion.   The cover sealing structure according to claim 6, wherein the connecting portion has a thick portion which is larger than the thickness of the pair of legs at least at a portion between the pair of legs.   The cover sealing structure according to any one of claims 1 to 7, wherein the top plate portion has an arc rib extending in a thickness direction and having an arc shape seen from the thickness direction. .   The base member is
    A rectangular base body,
    A terminal connection provided with the first base wall and the second base wall;
9. The cover sealing structure according to any one of claims 1 to 8, further comprising: a triangular flange portion connecting the base body and the terminal connection portion. The apparatus further comprises a housing attached to the base member,
10. The cover sealing structure according to any one of claims 1 to 9 , wherein the housing comprises a motor connecting portion to which a motor is integrally connected. A terminal including a plurality of conductive plate members is disposed on the base member, and
The cover sealing structure according to claim 10 , wherein the cover is disposed at a position covering a portion of the terminal and a fastening portion of the motor. The cover and the base member are provided with a floating preventing portion for preventing the cover from rising from the base member,
The floating preventing portion includes a locking portion that locks the cover to the base member,
The said latching | locking part is provided with the 1st latching | locking part provided in the outer side of the said cover, and the 2nd latching | locking part provided in the side which faces the said fastening part inside the said cover. The sealed structure of the cover as described in 11 . The first locking portion includes a first cover-side locking portion provided on the cover, and a first base-side locking portion provided on the base member,
The first cover side locking portion includes a pair of first leg portions extending toward the base member from the outside of the top plate portion, and a first connecting portion connecting end portions of the pair of first leg portions. Equipped with
The first base side locking portion includes a first claw portion that locks to the first connection portion,
The second locking portion includes a second cover-side locking portion provided on the cover, and a second base-side locking portion provided on the base member,
The second cover-side locking portion is a pair of second leg portions extending toward the base member from the side facing the fastening portion on the inner side of the top plate portion, and the end portions of the pair of second leg portions And a second connecting portion connecting the
The cover sealing structure according to claim 12 , wherein the second base-side locking portion includes a second hook portion that locks to the second connection portion. A controller comprising the cover sealing structure according to any one of claims 10 to 13 ;
A terminal including a plurality of conductive plate members is disposed on the base member, and a control circuit for controlling the motor is configured on the base member,
The controller is characterized in that the cover covers an electrical connection portion between a feed terminal of the motor and the terminal.

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