JP4545354B2 - Motor and sealing structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a motor in which a case such as a yoke and a member such as a lid provided at the open end of the case are separated and a sealing structure for such an assembly member such as a case and a lid.
[0002]
[Prior art]
A so-called water pump is used to circulate the cooling water of the vehicle. This type of water pump includes a drive unit that stores a drive source that generates a rotational force and a pump unit that stores an impeller. The pump unit is usually attached to or formed on an engine of a vehicle, and a drive unit is integrally connected to the pump unit.
[0003]
The rotating shaft of the drive unit is connected to the impeller, and the impeller is rotated by the driving force of the motor. On the other hand, the pump part is formed in the middle of the circulation path of the cooling water, and when negative pressure is generated on the inlet (suction port) side formed in the pump part by the rotation of the impeller, the cooling water ( For example, long life coolant) is sucked into the pump unit, and the cooling water supplied into the pump unit is sent to the outlet (discharge port) side formed in the pump unit by rotation of the impeller and connected to the outlet. It is sent to the circulation channel. Thereby, cooling water circulates in a circulating water channel.
[0004]
Also, in this type of water pump, a so-called motor pump in which a small DC motor is applied as a drive source may be used.
[0005]
By the way, in such a small motor, a bottomed cylindrical case that accommodates a rotor and a permanent magnet is formed of a metal having magnetism, and the magnetic field lines constituting the magnetic field of the permanent magnet are formed by this case. It is a road (that is, the case is a so-called yoke).
[0006]
The open end of the case is closed by fixing a lid that also serves as a part of the pump housing of the pump unit to the open end side of the case by fastening means such as a screw or a bolt.
[0007]
Furthermore, an annular groove is formed in either one of the opening end of the lid and the case, and the lid and the case are fastened and fixed with a gasket disposed in the groove. Is sealed, thereby preventing water from entering from the outside.
[0008]
[Problems to be solved by the invention]
By the way, the width of the groove formed at the opening end of the lid or the case is formed larger than the width of the gasket in the normal state in consideration of the deformation of the gasket after the lid and the case are fastened and fixed.
[0009]
For this reason, if a gasket is placed in this groove and the lid and the case are fastened and fixed, the gasket may move out of the groove due to a slight relative displacement of the lid with respect to the case at the time of fastening and fixing. there were. If the lid and the case are fastened and fixed with the gasket coming out of the groove in this way, the gap between the lid and the case may not be securely sealed, or the lid may be fixed in a distorted state with respect to the case. For this reason, the lid and the case must be fastened and fixed with great care, and there is much room for improvement.
[0010]
In consideration of the above facts, the present invention provides a motor capable of fixing the mounting member and the case in a state in which the space between the mounting member such as the lid and the case is securely sealed, and a pair of assembly members such as the lid and the case. It is an object to obtain a sealing structure that can be fixed in a state of being securely sealed.
[0011]
[Means for Solving the Problems]
  The motor according to claim 1, wherein an opening is formed at least at one end and a rotor is accommodated therein, a mounting member that is assembled to the case so as to face one end of the case, one end of the case, and Formed on at least one of the opposing ends of the mounting member facing one end of the case to surround the openingIn addition, a pair of curved portions, each curved so as to open inward, are formed to face each other.Of the inner wall and one end of the case and the opposite end of the mounting member, the inner wall is formed on the side having the inner wall and surrounds the inner wall.OutsideThe inner wall and the outer wall are arranged between the wall, the inner wall and the outer wall, and in the arrangement state, the inner circumferential portion faces the inner wall and the outer circumferential portion faces the outer wall in the radial direction of the inner wall and the outer wall. ZhouPartInsideWallWith an annular body spaced apartAs well as,The inner peripheral surface is curved following the outer peripheral surface of the bending portion,In the arrangement stateThe inner surface isAboveInsideA contact portion that abuts against a wall is formed on the main body, and the case and the attachment member are disposed outside the opening portion in close contact with both the attachment member and the case in the assembled state of the attachment member to the case. And a sealing member for sealing between the two.
[0012]
According to the motor configured as described above, an attachment member, such as a lid, is assembled to the opening end of the case that accommodates the rotor. For example, if the attachment member is a lid, the opening end of the case is closed by the attachment member. The
[0013]
An annular sealing member is disposed between the inner wall formed at at least one of the one end of the case and the opposite end of the mounting member facing the one end of the case, and the outer wall formed outside the inner wall. The sealing member seals between the opening end of the case and the opposing end of the mounting member.
[0014]
  On the inner wallA pair of curved portions curved so as to open toward the inside of the inner wall are opposed to each other, and a contact portion whose inner peripheral surface is curved so as to follow the outer peripheral surface of these curved portions. The main body constituting the sealing member is formed.Here, this sealing member is the main body of the sealing memberofInner circumferenceButInsideWallAway from thisOn the outer peripheral surface of the curved part constituting the inner wallContact part onlyContactTouching.
[0015]
  Therefore, since the width of the main body of the sealing member (more precisely, the dimension of the main body along the facing direction of the inner wall and the outer wall) is smaller than the distance between the inner wall and the outer wall, Placement of the sealing member is easy, but the placed sealing member tries to moveAnd the inner wallInterfering with the contact area. Moreover,The body of the sealing memberOutsideOn the wallIf you are in contact,OutsideWallOf the body of the sealing memberPerimeterParthave a finger in the pie.
[0016]
Thereby, the displacement of the sealing member is suppressed, the sealing member can be prevented from coming out from between the outer wall and the inner wall, and the sealing performance between the case and the mounting member in a state where the mounting member is assembled to the case is ensured. it can.
[0017]
In addition, since the sealing member can be prevented from coming out from between the outer wall and the inner wall in this way, when attaching the mounting member to the case, careful attention should be paid so that the sealing member does not come out between the outer wall and the inner wall. There is no particular need for this, so that the workability in the assembling work for assembling the mounting member to the case can be improved.
[0018]
In the present invention, the case only has to have a configuration in which the rotor of the motor is accommodated inside. Therefore, if the yoke constituting the motor also serves as a case, this yoke corresponds to the case in the present invention. Further, for example, when the yoke is configured to accommodate a small motor that also serves as a casing in the housing, the casing also corresponds to the case in the present invention, and the housing also accommodates the rotor via the casing. The housing also corresponds to the case in the present invention.
[0019]
In the present invention, the outer wall and the inner wall are formed on at least one of one end of the case and the opposite end of the mounting member, and these outer wall and inner wall are formed so as to protrude from one end of the case and the opposite end of the mounting member. The configuration is not limited to the above.
[0020]
That is, for example, when a groove is formed at one end of the case or the opposite end of the mounting member and the sealing member is accommodated in the groove, the relative wall of the grooves facing the inner width direction of the groove is relatively In addition, the peripheral wall located on the radially inner side of the groove is the inner wall in the present invention, and the peripheral wall located on the outer side is the outer wall.
[0021]
  According to a second aspect of the present invention, there is provided the motor according to the first aspect of the invention.The sum of the width dimension of the contact portion along the radial direction of the sealing member and the width dimension of the main body is set equal to the interval between the outer wall and the inner wall.It is characterized by that.
[0022]
  In the motor with the above configuration,The sum of the width dimension of the contact portion along the radial direction of the sealing member and the width dimension of the main body is equal to the distance between the outer wall and the inner wall. Thereby, if a sealing member is arrange | positioned between an inner wall and an outer wall, the outer peripheral part of the main body of a sealing member will contact an outer wall, and a contact part will contact the curved part of an inner wall. As a result, when the sealing member tries to move, the outer wall interferes with the main body, the curved portion of the inner wall interferes with the contact portion, and the displacement of the sealing member is regulated by the interference between the outer wall and the inner wall. It is possible to prevent or suppress the member from slipping out between the outer wall and the inner wall.
[0029]
  Claim3The motor according to claim 1.OrClaim2In the present invention, the sealing member is deformed by a pressing force applied from the case and the mounting member when the mounting member is assembled to the case, and is closely attached to the case and the mounting member by the deformation. It is characterized by doing.
[0030]
In the motor configured as described above, when the mounting member is assembled to the case, a pressing force (including a pressing reaction force) is applied to the sealing member disposed between the outer wall and the inner wall from the case and the mounting member. When the sealing member is deformed (elastically deformed or plastically deformed) by the pressure, the sealing member is in close contact with both the case and the mounting member. Thereby, the space between the case and the mounting member is sealed (sealed).
[0031]
  Claim4The motor according to claim 1 to claim 1.3In the present invention described in any one of the above, the thickness dimension of the sealing member along the height direction of the outer wall is larger than the height dimension of the outer wall and twice the height dimension of the outer wall. It is characterized by less than.
[0032]
In the motor having the above configuration, the thickness dimension of the sealing member (the dimension along the height direction of the outer wall) is larger than the height dimension of the outer wall. For this reason, when the sealing member is arranged on the bottom between the inner wall and the outer wall, it seals to the side having no inner wall at one end of the case and the opposite end of the mounting member rather than the height direction side end of the outer wall. The stop member protrudes. For this reason, the sealing member is in close contact with the outer wall without interfering with the outer wall, so that the gap between one end of the case and the opposite end of the mounting member is reliably sealed.
[0033]
In addition, as described above, one end side of the sealing member in the thickness direction intermediate portion (not the central portion) protrudes beyond the height direction end portion of the outer wall toward the side having no inner wall. Since the thickness dimension of the sealing member along the height direction of the outer wall is less than twice the height dimension of the outer wall, the sealing member has an outer wall and an inner wall rather than a portion protruding from the end in the height direction of the outer wall. There are more parts housed between. For this reason, the interference of the outer wall with respect to a sealing member can be enlarged.
[0034]
As a result, even when an external force is applied in a direction orthogonal to the thickness direction of the sealing member in a state where the sealing member is accommodated between the outer wall and the inner wall, the outer wall and the inner wall are reliably and greatly interfered by the outer wall. It can prevent more reliably that a sealing member slips out from between. Thus, in this motor, the sealing performance by the sealing member can be obtained more reliably, and the sealing member can be prevented from being assembled in a state where the sealing member is pulled out from between the outer wall and the inner wall (that is, the assembling performance is improved). improves).
[0035]
  Moreover, the present invention claims3If the configuration is dependent on the described invention, the sealing member is elastically deformed by the pressing force from both the case and the mounting member, so that the sealing member is more closely attached to the outer wall than the portion protruding from the outer wall. To do. This further improves the sealing performance.
[0036]
  Claim5According to the present invention, a pair of assembling members in which openings that are open toward the other are formed on at least one of the facing ends that face each other in the assembled state, are provided on the outside of the opening. A sealing structure that seals the gap, and is formed on at least one of the pair of assembly members to surround the openingIn addition, a pair of curved portions, each curved so as to open inward, are formed to face each other.The inner wall and the pair of assembly members are formed on the side having the inner wall and surround the inner wall.OutsideThe inner wall and the outer wall are arranged between the wall, the inner wall and the outer wall, and in the arrangement state, the inner circumferential portion faces the inner wall and the outer circumferential portion faces the outer wall in the radial direction of the inner wall and the outer wall. ZhouPartInsideWallWith an annular body spaced apartAs well as,The inner peripheral surface is curved following the outer peripheral surface of the bending portion,In the arrangement stateThe inner surface isAboveInsideA contact portion that abuts against a wall is formed on the main body, and the case and the attachment member are disposed outside the opening portion in close contact with both the attachment member and the case in the assembled state of the attachment member to the case. And a sealing member for sealing between the two.
[0037]
According to the sealing structure having the above configuration, the pair of assembling members are assembled in a state where the opposing end of one assembling member and the opposing end of the other assembling member face each other.
[0038]
Further, in the assembled state of these assembled members, an inner wall and an outer wall are formed on at least one of the opposing surfaces of the pair of assembled members, and a seal is provided between the inner wall and the outer wall. A stop member is applied. The sealing member is in close contact with both opposing surfaces in the assembled state of the pair of assembling members, thereby sealing between the opposing surfaces.
[0039]
  The inner wall is formed with a pair of curved portions that are curved so as to open toward the inside of the inner wall so as to face each other, and an inner peripheral surface is formed so as to follow the outer peripheral surfaces of these curved portions. A curved contact portion is formed on the main body constituting the sealing member.here,This sealing member isSealing bodyofInner circumferenceButInsideWallAway from thisOn the outer peripheral surface of the curved part constituting the inner wallContact part onlyContactTouching.
[0040]
  Therefore, since the width of the main body of the sealing member (more precisely, the dimension of the main body along the facing direction of the inner wall and the outer wall) is smaller than the distance between the inner wall and the outer wall, Placement of the sealing member is easy, but the placed sealing member tries to moveAnd the inner wallInterfering with the contact area. Moreover,The body of the sealing memberOutsideOn the wallIf you are in contact,OutsideWallOf the body of the sealing memberPerimeterParthave a finger in the pie.
[0041]
Thereby, the displacement of the sealing member is suppressed, the sealing member can be prevented from coming out from between the outer wall and the inner wall, and the sealing property between the opposing surfaces in the state where the assembly member is assembled to the assembly member can be secured. .
[0042]
In addition, since the sealing member can be prevented from coming out from between the outer wall and the inner wall in this way, when the pair of assembling members are assembled, the sealing member does not come out from between the outer wall and the inner wall. Is not particularly required, and this makes it possible to improve workability in assembling work for assembling the pair of assembling members.
[0043]
In the present invention, the outer wall and the inner wall are formed on at least one of the opposed ends of the pair of assembly members, but the outer wall and the inner wall are formed so as to protrude from the opposed ends of the assembly member. It is not limited.
[0044]
That is, for example, in the case where an annular groove is formed at the opposite end of the assembly member and the sealing member is accommodated in this groove, of the peripheral walls of the groove facing the inner width direction of the groove, The peripheral wall located on the radially inner side of the groove is the inner wall referred to in the present invention, and the peripheral wall located on the outer side is the outer wall.
[0045]
  Further, the case and the mounting member in the present invention according to claim 1 are claimed.5It can be regarded as a pair of assembling members in the described invention. Accordingly, claims 2 to4The present invention as described is claimed as it is5Needless to say, the present invention can be applied (subordinated) to the described invention.
[0046]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 3 is a side view of the motor pump 10 to which the motor according to the first embodiment of the present invention is applied.
[0047]
As shown in this figure, the motor pump 10 includes a motor unit 12. The motor unit 12 includes a yoke 14 as a case or an assembly member. The yoke 14 is made of a magnetic material such as metal and has a bottomed cylindrical shape whose cross-sectional shape cut in a direction orthogonal to the axial direction is substantially circular, substantially elliptical, or substantially oval.
[0048]
In addition, a bearing housing portion 18 formed in a cylindrical shape having a smaller diameter than the main body portion of the yoke 14 is formed at substantially the center of the bottom portion 16 of the yoke 14, and a bearing portion 20 such as a ball bearing is fitted inside the bearing housing portion 18. ing. One end of a shaft 22 that is axial along the opening direction of the yoke 14 is rotatably supported on the bearing portion 20.
The other end side of the shaft 22 protrudes from the opening end 24 of the yoke 14 and protrudes into a pump housing 28 that constitutes a part of the vehicle engine of the pump portion 26 disposed on the side of the opening end 24 side of the yoke 14. ing.
[0049]
The inside of the pump housing 28 forms a cooling water circulation channel, and accommodates an impeller (not shown) coaxially and integrally connected to the other end of the shaft 22. A suction port and a discharge port (not shown) are respectively formed in the mounting portion of the pump housing 28 or the pump housing 28 of the engine. When the impeller rotates in a predetermined direction, a negative pressure is generated on the suction port side. Due to the generation of the negative pressure, the cooling water in the cooling water passage formed or provided in the engine is sucked into the pump housing 28 from the suction port. Further, the cooling water sucked into the pump housing 28 from the suction port by the rotation of the impeller is forcibly sent to the discharge port side, and is sent out from the discharge port into the cooling water passage at a predetermined pressure. Thereby, cooling water circulates in a cooling water channel.
[0050]
On the other hand, as shown in FIG. 3, a housing 30 as an attachment member or an assembly member is disposed between the yoke 14 and the pump housing 28, and the yoke 14 and the housing 30 are integrated by screws 32. It is connected to. Inside the housing 30, a bearing portion 34 similar to the bearing portion 20 described above is fitted coaxially with the bearing portion 20, so that the shaft 22 can be rotated outside the opening end 24 of the yoke 14. It is pivotally supported.
[0051]
As shown in FIG. 3, a rotor 36 is integrally attached to an axially intermediate portion of the shaft 22 (more specifically, a portion accommodated inside the yoke 14). The rotor 36 includes a core formed of a magnetic member and a winding wound around the core, and forms a magnetic field around the winding when the winding is energized.
[0052]
Further, as shown in FIG. 4, a pair of magnets 38 are arranged outside the rotor 36 along the radial direction of the shaft 22 so as to face each other with the rotor 36 interposed therebetween. These magnets 38 are integrally fixed to the inner peripheral portion of the yoke 14, and form a magnetic field around the magnets. A mutual magnetic field formed when the winding of the rotor 36 is energized. As a result, a rotational force is generated in the rotor 36, whereby the shaft 22 integral with the rotor 36 rotates around its own axis. The yoke 14 described above is a magnetic path of a magnetic field formed by the magnet 38.
[0053]
A commutator 40 is integrally attached to the shaft 22 along the axial direction of the shaft 22 and closer to the bearing portion 34 than the rotor 36. The commutator 40 is electrically connected to the winding of the rotor 36 through a conductive wire. Further, the brush 42 is fixed to the yoke 14 or the housing 30 outside the commutator 40 along the rotational radius direction of the shaft 22. The brush 42 is electrically connected to a battery mounted on the vehicle, an operation switch provided near the driver's seat of the vehicle, and the like.
The brush 42 is provided so as to be slidable to the commutator 40. When electric power is supplied from the vehicle battery while being in slidable contact with the commutator 40, the rotor 36 is wound via the commutator 40. Energize the wire.
[0054]
Further, as shown in FIGS. 1 and 2, a circular hole 46 through which the shaft 22 passes is formed at the opposed end 44 of the housing 30 that faces the open end 24 of the yoke 14 described above. A gasket housing portion 48 having a substantially oval shape in plan view is formed around the circular hole 46 at the opposite end 44 of the housing 30. The gasket accommodating portion 48 is a stepped portion having a step on one end side in the axial direction of the shaft 22 with respect to the other portion of the opposed end 44, and a gasket 50 described later is accommodated therein.
[0055]
A wall portion facing the shaft 22 along the rotational radius direction of the shaft 22 at the boundary between the gasket housing portion 48 and the other portion of the facing end 44 is an outer wall 52. In the present embodiment, a gasket housing portion 48 is formed in the intermediate portion in the width direction of the opposed end 44, and when the housing 30 is viewed along the longitudinal direction of the gasket housing portion 48, the shape thereof is toward one axial end side of the shaft 22. The outer wall 52 is formed so as to be opposed to both sides of the gasket accommodating portion 48 in the width direction because it has a concave shape that opens toward the front.
[0056]
The outer walls 52 will be described in more detail. Each outer wall 52 includes a substantially straight flat wall portion 54. Each flat wall portion 54 is a wall having a flat surface facing inward in the width direction of the gasket accommodating portion 48. A curved portion 56 is continuously formed from both longitudinal ends of the flat wall portion 54. The curved portion 56 is curved with a predetermined curvature into a concave shape that opens inward in the rotational radius direction of the shaft 22.
[0057]
Further, an inner wall 58 is formed in the gasket housing portion 48. The inner wall 58 is formed in a substantially C shape in which a part of the ring is cut out in plan view so as to surround the circular hole 46 outside the circular hole 46 described above. Further, the inner wall 58 will be described in detail. The inner wall 58 includes a pair of curved portions 60.
[0058]
The curved portion 60 has a concave shape that is curved with a predetermined curvature so as to open toward the radially inward side of the circular hole 46, and is formed so as to face each other through the circular hole 46. Further, the inner wall 58 includes a flat wall portion 62. The flat wall portion 62 is formed in parallel to the flat wall portion 54 of the outer wall 52, and connects one end of both the curved portions 60 described above.
[0059]
On the other hand, a flat wall portion 64 parallel to the flat wall portion 62 is continuously formed at the other end of both curved portions 60. These flat wall portions 64 are formed to be separated from each other at the intermediate portion in the longitudinal direction of the gasket housing portion 48, whereby the inner wall 58 is substantially C-shaped in plan view. Further, the inner wall 58 protrudes toward the one axial end side of the shaft 22 from the opposed end 44 and enters the inside of the yoke 14.
[0060]
A gasket 50 as a sealing member is disposed between the outer wall 52 and the inner wall 58. The gasket 50 is formed in a thin ring shape having a substantially oval shape in a plan view by using a rubber material or a synthetic resin material having elasticity similar to that of a rubber material.
[0061]
The gasket 50 includes a main body 66. The main body 66 has a ring shape that is narrower than the distance between the outer wall 52 and the inner wall 58. Further, the outer width dimension of the main body 66 is substantially equal to the interval between the one outer wall 52 and the other outer wall 52 (strictly, it is extremely slightly smaller), and when the gasket 50 is housed in the gasket housing portion 48, The outer peripheral portion contacts the outer wall 52 (that is, the inner peripheral portion of the main body 66 does not contact the inner wall 58).
[0062]
  In addition, a pair of contact portions 68 are continuously formed on the inner peripheral portion of the main body 66. One of these contact portions 68 is formed corresponding to one of the two curved portions 60 of the inner wall 58, and the other contact portion 68 is formed corresponding to the other of the two curved portions 56. BothContact 68Is curved in a substantially concave shape that opens toward the inner side of the main body 66, and the curvature of the curved portion is substantially the same as the curvature of the outer peripheral portion of the curved portion 60.
[0063]
  In addition, thisContact 68And the width of the main body 66 are substantially equal to the distance between the outer wall 52 and the inner wall 58, and the curved portion of the contact portion 68 becomes the curved portion 60 of the inner wall 58 when the gasket 50 is accommodated in the gasket accommodating portion 48. Contact. Therefore, in the portion where the contact portion 68 is formed, the contact portion 68 is in contact with the inner wall 58 and the outer peripheral portion of the main body 66 is in contact with the outer wall 52.
[0064]
The thickness of the gasket 50 described above is the level difference between the gasket housing portion 48 and the portion other than the gasket housing portion 48 at the opposite end 44, that is, the gasket housing portion 48 when the yoke 14 and the housing 30 are connected by the screw 32. The distance between the yoke 14 and the opening end 24 is larger.
[0065]
<Operation and Effect of First Embodiment>
In the motor pump 10, the gasket 50 is accommodated between the outer wall 52 and the inner wall 58 of the gasket accommodating portion 48, and the screw 32 is in a state where the opening end 24 of the yoke 14 and the opposed end 44 of the housing 30 are opposed to each other. Are connected together.
[0066]
Here, as described above, in the portion where the contact portion 68 is formed, the contact portion 68 is in contact with the inner wall 58 and the outer peripheral portion of the main body 66 is in contact with the outer wall 52. When the gasket 50 is disposed between them, as shown in FIG. 5, the gasket 50 is pulled outward in the longitudinal direction so that the distance between the contact portions 68 is increased between one outer peripheral portion of the curved portion 56 and the other outer peripheral portion. The distance between the inner wall 58 and the inner peripheral portion of the gasket 50 is less than the distance.
[0067]
However, since the main body 66 of the gasket 50 is not in contact with the inner wall 58 and a gap is formed between the inner wall 58 and the gasket 50, the flat wall portion 62, 64, the interference between the portion corresponding to the flat wall portions 62 and 64 of the main body 66 and the flat wall portions 62 and 64 can be reduced, and the gasket 50 can be smoothly connected to the outer wall 52 and the inner wall 58. Can be placed between.
[0068]
On the other hand, the yoke 14 and the housing 30 are integrally connected by the screw 32 with the opening end 24 of the yoke 14 and the facing end 44 of the housing 30 facing each other. Since the gasket 50 is larger in thickness than the gasket 50, the gasket 50 is elastically deformed, and the gasket 50 comes into close contact with the gasket accommodating portion 48 and the opening end 24 of the yoke 14, whereby the yoke 14 and the housing 30 are sealed ( Sealed).
[0069]
Here, when the yoke 14 and the housing 30 are connected as described above, the gasket 50 is in close contact with the gasket accommodating portion 48 and the opening end 24 of the yoke 14, so When the housing 30 is relatively displaced, the gasket 50 is moved by being pulled by the yoke 14.
[0070]
However, since the outer peripheral portion of the main body 66 is in contact with the outer wall 52 and the contact portion 68 is in contact with the curved portion 60 of the inner wall 58, the outer wall 52 interferes with the main body 66 when the gasket 50 tries to move. The curved portion 60 (inner wall 58) interferes with the contact portion 68, and the interference between the outer wall 52 and the inner wall 58 restricts the displacement of the gasket 50 along the rotational radius direction of the shaft 22. As a result, the gasket 50 does not come out of the gasket housing portion 48, and therefore the sealing performance between the yoke 14 and the housing 30 can be secured and maintained.
[0071]
Further, as described above, since the inner wall 58 protrudes toward the one axial end side of the shaft 22 from the opposing end 44 of the housing 30, the height dimension of the inner wall 58 (projection dimension from the gasket housing portion 48) is the gasket 50. Greater than the thickness dimension. For this reason, the gasket 50 does not get over the inner wall 58, so that the movement of the gasket 50 can be restricted, and the sealing performance between the yoke 14 and the housing 30 can be secured and maintained.
[0072]
In the present embodiment, the motor according to the present invention is applied to the motor pump 10 for circulating cooling water. However, for example, a washer device for spraying a cleaning liquid onto a windshield glass, a lens of a headlight, or the like. Needless to say, the present invention can be applied to motors other than the motor pump as well as the motor pump. Similarly, in the present embodiment, the sealing structure according to the present invention is applied to the sealing (sealing) structure between the housing 30 and the yoke 14 of the motor pump 10, but the present invention is applied to the motor pump 10. Needless to say, the present invention can be applied to other motors other than the above, and to other sealing (seal) structures other than the motor.
[0073]
<Second Embodiment>
Next, a modified example of the gasket 50 as the sealing member described above will be described as a second embodiment and a third embodiment of the present invention. In describing each of the following embodiments, with respect to the basically same part as the previous embodiment than the embodiment described including the first embodiment described above, The same reference numerals are given and description thereof is omitted.
[0074]
FIG. 6 is a plan view showing a configuration of a main part of a motor pump 80 as a motor according to the second embodiment of the present invention.
[0075]
As shown in this figure, the motor pump 80 includes a gasket 82 as a sealing member in place of the gasket 50. Like the gasket 50, the gasket 82 is also formed of a rubber material or a synthetic resin material having elasticity similar to that of a rubber material. The gasket 82 includes a main body 84. The main body 84 is formed in a ring shape like the main body 66, but is formed so that the outer peripheral portion is separated from the outer wall 52 in a state where the gasket 82 is disposed between the outer wall 52 and the inner wall 58.
[0076]
In addition to the contact portion 68, a contact portion 86 is formed on the main body 84. The contact portion 86 is formed at a position displaced in the circumferential direction of the main body 84 with respect to the contact portion 68. The contact portion 68 corresponds to the curved portion 60 of the inner wall 58, whereas the contact portion 86 has the inner wall. 58 corresponds to the flat wall portions 62 and 64.
[0077]
Further, unlike the contact portion 86, the contact portion 86 is formed continuously from the outer peripheral portion of the main body 84 and is in contact with the outer wall 52.
[0078]
That is, when the gasket 82 in the motor pump 80 tries to move in the longitudinal direction of the gasket housing portion 48 with respect to the housing 30, the inner wall 58 interferes with the contact portion 68 and restricts the movement of the gasket 82. On the other hand, when the gasket accommodating portion 48 tries to move in the width direction, the outer wall 52 interferes with the contact portion 86 and restricts the movement of the gasket 82. As a result, the gasket 82 can be more reliably prevented from coming out of the gasket housing portion 48, and the sealing performance between the yoke 14 and the housing 30 can be more reliably maintained.
[0079]
<Third Embodiment>
Next, a third embodiment of the present invention will be described.
[0080]
FIG. 7 is a plan view showing a configuration of a main part of a motor pump 100 as a motor according to the present embodiment.
[0081]
As shown in this figure, the motor pump 100 includes a gasket 102 as a sealing member instead of the gasket 50. Like the gasket 50, the gasket 102 is also formed of a rubber material or a synthetic resin material having elasticity similar to that of a rubber material. The gasket 102 includes a pair of contact portions 104. These contact portions 104 are formed continuously from the inner peripheral portion of the main body 84 so as to face the contact portion 86 on the opposite side of the contact portion 86 through the main body 84, and are in contact with the inner wall 58. .
[0082]
That is, when the gasket 102 in the motor pump 100 tries to move in the width direction of the gasket housing portion 48 with respect to the housing 30, the outer wall 52 interferes with the contact portion 86 to restrict the movement of the gasket 102 and the inner wall 58. Interferes with the contact portion 104 and restricts the movement of the gasket 102. As a result, the gasket 102 can be more reliably prevented from slipping out of the gasket housing portion 48, and the sealing performance between the yoke 14 and the housing 30 can be more reliably maintained.
[0083]
<Fourth embodiment>
Next, a fourth embodiment of the present invention will be described.
[0084]
FIG. 8 is a plan view showing a configuration of a main part of a motor pump 120 as a motor according to the present embodiment, and FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG. ing.
[0085]
As shown in these drawings, the motor pump 120 does not include the gasket 50, but instead includes a gasket 122 as a sealing member. The gasket 122 has basically the same configuration as the gasket 50 in the first embodiment, but the thickness dimension T1 of the gasket 122 is larger than the height dimension T2 of the outer wall 52 as shown in FIG. Moreover, it is smaller than twice the height dimension T2 of the outer wall 52 (that is, T2 <T1 <2 × T2).
[0086]
Therefore, in a state where the gasket 122 is accommodated in the gasket accommodating portion 48, the thickness dimension T2 of the portion of the gasket 122 located between the outer wall 52 and the inner wall 58 (that is, basically the height dimension of the outer wall 52). Is larger than the thickness dimension T11 of the portion protruding from the outer wall 52 toward the opening end 24 (that is, T11 <T2).
[0087]
In the motor pump 120 having the above-described configuration, the gasket 122 has more portions accommodated between the outer wall 52 and the inner wall 58 than the portion protruding from the end in the height direction of the outer wall 52. For this reason, the interference of the outer wall 52 with respect to the gasket 122 becomes large. As a result, for example, when the yoke 14 is assembled to the housing 30, the gasket 122 accommodated in the gasket accommodating portion 48 due to vibration or interference of the opening end 24. Even if an external force is applied in a direction orthogonal to the thickness direction of the gasket 122, the gasket 122 can be more reliably prevented from coming out of the gasket housing portion 48 due to the reliable and large interference of the outer wall 52.
[0088]
Accordingly, in the present motor pump 120, the sealing performance by the gasket 122 can be obtained more reliably, and the gasket 122 can be prevented from being assembled in a state where the gasket 122 is pulled out from between the outer wall 52 and the inner wall 58 (that is, assembly). Improved).
[0089]
In addition, after the yoke 14 is assembled to the housing 30, the gasket 122 is elastically deformed. In this case, the gasket 122 is more closely attached to the outer wall 52 than the portion protruding from the outer wall 52. This further improves the sealing performance.
[0090]
Since the configuration of the present embodiment is basically the same as that of the first embodiment, the same operation as that of the first embodiment is basically performed and the same effect can be obtained. Needless to say.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a main part of a motor according to a first embodiment of the present invention.
FIG. 2 is a plan view showing a main part of the motor according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view in which a part of the motor according to the first embodiment of the present invention is broken.
4 is a cross-sectional view taken along line 4-4 of FIG.
FIG. 5 is a plan view showing a state in which the sealing member is pulled.
FIG. 6 is a plan view showing a main part of a motor according to a second embodiment of the present invention.
FIG. 7 is a plan view showing a main part of a motor according to a third embodiment of the present invention.
FIG. 8 is a plan view showing a main part of a motor according to a fourth embodiment of the present invention.
9 is an enlarged cross-sectional view taken along line 9-9 of FIG.
[Explanation of symbols]
10 Motor pump (motor)
14 Yoke (case, assembly member)
24 Open end
30 Housing (Mounting member, assembly member)
36 rotor
44 Opposite end
50 Gasket (sealing member)
52 Exterior wall
58 inner wall
66 body
68 Contact area
80 Motor pump (motor)
82 Gasket (sealing member)
84 body
86 Contact part
100 Motor pump (motor)
102 Gasket (sealing member)
104 Contact area
120 Motor pump (motor)
122 Gasket (sealing member)

Claims (5)

A case in which an opening is formed at least at one end and the rotor is accommodated therein;
An attachment member assembled to the case opposite to one end of the case;
A pair of curved portions that are formed on at least one of the one end of the case and the opposite end of the mounting member facing the one end of the case and surround the opening, and are curved so that each of them opens toward the inside. Inner walls formed to face each other ;
Of the opposing ends of the one end and the mounting member of the case, and enclose the outer wall of said inner wall is formed for those having the inner wall,
The inner wall is arranged between the inner wall and the outer wall, and in the arrangement state, the inner circumferential portion faces the inner wall in the radial direction of the inner wall and the outer wall, the outer circumferential portion faces the outer wall, and the inner circumferential portion is contact while have a circular body spaced within the wall or al, curved surface of the inner peripheral side following the outer circumferential surface of the bending portion, the surface of the inner peripheral side in the arrangement abuts to the wall A portion is formed on the main body, and in the assembled state of the mounting member to the case, tightly contacts both the mounting member and the case and seals between the case and the mounting member outside the opening. A sealing member to be
Motor with. 2. The motor according to claim 1 , wherein the sum of the width dimension of the contact portion along the radial direction of the sealing member and the width dimension of the main body is set equal to the interval between the outer wall and the inner wall . The sealing member is deformed by a pressing force applied from the case and the mounting member when the mounting member is assembled to the case, and is closely attached to the case and the mounting member by the deformation. The motor according to claim 1 or 2 . The thickness dimension of the sealing member along the height direction of the outer wall is larger than the height dimension of the outer wall and less than twice the height dimension of the outer wall. The motor according to any one of claims 1 to 3 . A pair of assembling members, each having an opening that opens toward at least one of the opposing ends facing each other in an assembled state, is sealed between the opposing ends outside the opening. Stop structure,
An inner wall formed on at least one of the pair of assembling members so as to surround the opening, and a pair of curved portions that are curved so that each of them opens toward the inside face each other ;
Of the pair of assembling members, and enclose the outer wall of said inner wall is formed for those having the inner wall,
The inner wall is arranged between the inner wall and the outer wall, and in the arrangement state, the inner circumferential portion faces the inner wall in the radial direction of the inner wall and the outer wall, the outer circumferential portion faces the outer wall, and the inner circumferential portion is contact while have a circular body spaced within the wall or al, curved surface of the inner peripheral side following the outer circumferential surface of the bending portion, the surface of the inner peripheral side in the arrangement abuts to the wall A portion is formed on the main body, and in the assembled state of the mounting member to the case, tightly contacts both the mounting member and the case and seals between the case and the mounting member outside the opening. A sealing member to be
A sealing structure comprising:

Images