JP5446545B2 - Electric pump mounting structure - Google Patents

Description

  The present invention relates to a mounting structure in which an electric pump that sucks fluid and pumps it to a member to be mounted, and is effective when applied to a vehicle.

  Conventionally, Patent Document 1 discloses an attachment structure for attaching an electric pump for circulating cooling water to an inverter or the like to a pump bracket fixed to a vehicle body. In the mounting structure of Patent Document 1, an electric plate is fastened to a stud bolt on one surface with a nut using an intermediate plate having a plurality of stud bolts fixed on both surfaces, and a stud bolt on the other surface. The pump bracket is tightened and fixed with a nut.

  At this time, a rubber vibration isolating bush is interposed between the electric pump and the intermediate plate and between the intermediate plate and the pump bracket so that the electric pump and the intermediate plate are not in contact with each other. And the pump bracket are in a non-contact state. Thereby, the vibration generated by the electric pump is suppressed from being transmitted to the vehicle interior via the pump bracket.

JP 2006-112519 A

  However, in the mounting structure of Patent Document 1, since the electric pump is attached to the pump bracket using the intermediate plate, there are two attachments, that is, an attachment process between the electric pump and the intermediate plate and an attachment process between the intermediate plate and the pump bracket. A process is required, and workability when the electric pump is attached to the attachment target member is poor.

  In view of the above points, an object of the present invention is to achieve both suppression of transmission of vibration of an electric pump to an attachment target member and improvement in workability when the electric pump is attached to the attachment target member. To do.

In order to achieve the above object, the invention according to claim 1 is an attachment structure for attaching an electric pump (20) for sucking and feeding fluid to an attachment target member (10),
A belt-like attachment member (30) that is fixed to the attachment target member (10) and arranged annularly on the outer peripheral side of the electric pump (20), and an outer peripheral side of the electric pump (20) and the attachment member (30) And an elastic member (40) that is arranged between the inner peripheral side and is elastically deformable,
The mounting member (30) is annularly arranged on the outer peripheral side of the electric pump (20), and the elastic member (40) is between the outer peripheral side of the electric pump (20) and the inner peripheral side of the mounting member (30). The electric pump (20) is held on the inner peripheral side of the mounting member (30) in a sandwiched state ,
On the outer peripheral surface of the electric pump (20), there are formed pump portion side protruding portions (27, 28) protruding toward the outer peripheral side of the electric pump (20), and the elastic member (40) has a pump portion side protruding portion. The elastic member side contact portions (41, 42) that contact the portions (27, 28) are formed, and the elastic member side protruding portion (43) that protrudes toward the outer peripheral side of the electric pump (20) is formed. The attachment member (30) is formed with attachment member side contact portions (31e, 32d) that contact the elastic member side protruding portion (43), and the elastic member side contact portions are elastic members (40). ), And the mounting member (30) is provided with notches (31h, 32g) matching the hole (41). The pump side protrusion (27) is fitted in the hole (41) With the, characterized in that so as to prevent direct contact between the pump unit side projection (27) and the mounting member (30) by notches (31h, 32 g).

According to this, only by arrange | positioning annularly so that the attachment member (30) fixed to the attachment object member (10) may be wound around the outer peripheral side of an electric pump (20), an electric pump (20) is attached to an attachment object member. (10) can be attached. Therefore, workability when attaching the electric pump (20) to the attachment target member (10) can be improved as compared with the case where the attachment member (30) is attached to both the electric pump (20) and the attachment target member (10). .

Furthermore, since the attachment member (30) is annularly arranged on the outer peripheral side of the electric pump (20) and the attachment member (30) is curved along the outer peripheral shape of the electric pump (20), the electric pump (20) The electric pump (20) can be temporarily held on the mounting member (30) using its own weight or the fitting state of the mounting member (30) and the electric pump (20).

As a result , workability when the electric pump (20) is attached to the attachment target member (10) can be effectively improved.
In addition to this, in the invention according to claim 1, the pump-side protrusion (27) is fitted into the hole (41) as the elastic member-side contact portion of the elastic member (40), and the elastic member (40 The elastic member-side protruding portion (43) of the mounting member (30) is brought into contact with the mounting member-side contact portions (31e, 32d) of the mounting member (30), so that the electric pump (20) and the mounting member (30) The positioning of the elastic member (40) can be facilitated with respect to both, and the displacement of the elastic member (40) relative to both the electric pump (20) and the mounting member (30) can be prevented. As a result, workability at the time of attaching the electric pump (20) to the attachment target member (10) can be further effectively improved.
In addition, by fitting the pump-side protrusion (27) into the hole (41), the electric pump (20) is elastic with respect to the electric pump (20) even after the electric pump (20) is attached to the attachment target member (10). It can suppress that the position of a member (40) and an attachment member (30) shifts | deviates.

Furthermore , since the elastic member (40) is sandwiched between the outer peripheral side of the electric pump (20) and the inner peripheral side of the mounting member (30), the electric pump (20) and the mounting member (30) are It can be in a non-contact state.
In addition, the mounting member (30) is provided with notches (31h, 32g) that fit into the hole (41) as the elastic member side abutting portion, and the notch (31h, 32g) causes the pump side protrusion. Direct contact between (27) and the mounting member (30) is prevented.
Combined with the above, the vibration of the electric pump (20) can be effectively suppressed from being transmitted to the mounting member (30). As a result, it is possible to suppress the vibration of the electric pump (20) from being transmitted to the attachment target member (10) via the attachment member (30).

  As a result, both suppression of transmission of vibration of the electric pump (20) to the attachment target member (10) and improvement in workability when attaching the electric pump (20) to the attachment target member (10) are achieved. Can be planned.

In the invention according to claim 2, in the electric pump mounting structure according to claim 1, the pump part side protrusion fitted into the hole (41) is the first pump part side protrusion (27). A second pump part-side protrusion (28) different from the first pump part-side protrusion (27) is provided on the outer peripheral surface of the electric pump (20), and a hole ( 41) In addition to the elastic member (40), a surface (42) perpendicular to the axial direction of the electric pump (20) is provided, and the second pump portion side protrusion (28) is perpendicular to the axial direction. A flat surface (42).
According to this, even after the electric pump (20) is attached to the attachment target member (10), the positions of the elastic member (40) and the attachment member (30) relative to the electric pump (20) are the electric pump (20 ) In the axial direction can be more reliably suppressed.
According to a third aspect of the present invention, in the electric pump mounting structure according to the first or second aspect, the mounting member (30) is fixed to the mounting target member (10) so as to have an outer peripheral shape of the electric pump (20). A curved member (31) that is curved along, and a connecting member (32) that connects both ends of the curved member (31). The curved member (31) and the connecting member (32) are connected to each other to attach the curved member (31). The member (30) is annularly arranged on the outer peripheral side of the electric pump (20).
According to this, both ends of the bending member (31) and the connecting member (32) can be connected with the electric pump (20) temporarily fixed to the bending member (31). Therefore, workability at the time of attaching the electric pump (20) to the attachment target member (10) can be effectively improved.
In the invention according to claim 4 , in the electric pump mounting structure according to claim 3 , one end portions of the bending member (31) and the connecting member (32) are connected by tightening the bolt (50), The elastic member (40) is compressed and deformed as the bolt (50) is tightened.

  According to this, by adjusting the tightening load of the bolt (50), the electric pump (20) is appropriately deformed without receiving an unnecessary compressive load from the mounting member (10) and being deformed. (20) can be retained. Furthermore, since it can suppress that an elastic member (40) compresses and deform | transforms unnecessarily and rigidity becomes high, it can suppress appropriately that the vibration of an electric pump (20) is transmitted to an attachment member (30). .

According to the fifth aspect of the present invention, in the electric pump mounting structure according to the fourth aspect , the one end (31c) of the bending member (31) and the connecting member (32) connected by being tightened by the bolt (50). ) Is provided with a temporarily fixing claw portion (32e) which is temporarily fixed to the other end portion (32b). According to this, the bolt (50) can be easily tightened.

In the invention according to claim 6 , in the electric pump mounting structure according to any one of claims 3 to 5 , the other end portions of the bending member (31) and the connecting member (32) are bent members ( 31) The engaging claw (32c) provided on the other side is engaged with the engaging hole (31g) provided on at least one of the other end (31d) of the connecting member (32) and the other end of the connecting member (32). It is connected by stopping.

  According to this, with respect to the case where both ends of the bending member (31) and the connecting member (32) are connected by tightening the bolt (50), the electric pump (20) is attached to the attachment target member (10). ) Can improve the workability when attaching to.

As in the invention according to claim 7, in the mounting structure of an electric pump according to claim 1 or 2, the mounting member (30) is integrally curved annular along the outer peripheral shape of the electric pump (20) You may comprise by one member formed in.

According to an eighth aspect of the present invention, in the electric pump mounting structure according to any one of the first to seventh aspects, the mounting member (30) and the elastic member (40) are joined together and integrally formed. It is characterized by being. Thereby, workability | operativity at the time of attaching an electric pump (20) to an attachment object member (10) can be improved further.

According to a ninth aspect of the present invention, in the electric pump mounting structure according to any one of the first to eighth aspects, an electric pump (20) is provided on a surface of the elastic member (40) on the electric pump (20) side. 20) A pump-side contact portion (44) formed so as to protrude toward the side is provided, and the surface of the elastic member (40) on the mounting member (30) side is provided on the mounting member (30) side. An attachment member side contact portion (45) formed so as to protrude toward the center is provided, and the pump side contact portion (44) and the attachment member side contact portion (45) are perpendicular to the axial direction of the electric pump (20). When viewed from various directions, they are arranged so as not to be superposed on each other.

According to this, the pump side contact portion (44) and the attachment member side contact portion (45) are arranged so as not to overlap each other when viewed from the direction perpendicular to the axial direction of the electric pump (20). Therefore, the elastic coefficient of the elastic member (40) can be reduced, and the vibration transmission distance from the electric pump (20) to the mounting member (30) can be increased. As a result, the vibration of the electric pump (20) can be effectively suppressed from being transmitted to the attachment target member.
As in the invention described in claim 10, in the electric pump mounting structure according to any one of claims 1 to 9, the elastic member (40) includes an outer peripheral side of the electric pump (20) and a mounting member ( 30) may be constituted by one annular member disposed between the inner peripheral side and the inner peripheral side.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is an external appearance perspective view which shows the attachment structure of the electric pump of 1st Embodiment. It is an axial sectional view of the electric pump of the first embodiment. It is AA sectional drawing of FIG. 2 in 1st Embodiment. (A) is a front view of the free float packing of 1st Embodiment, (b) is a top view of (a), (c) is a side view of (a). It is a perspective view of the electric pump and free float packing of 2nd Embodiment. It is AA sectional drawing of FIG. 2 in 3rd Embodiment. It is an axial sectional view of the electric pump of a 4th embodiment.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an external perspective view of the electric pump 20 in a state of being attached to a bracket 10 that is an attachment target member of the present embodiment, and shows an attachment structure of the electric pump 20 of the present embodiment. 2 is an axial sectional view of the electric pump 20 attached to the bracket 10, and FIG. 3 is an AA sectional view of FIG.

  The bracket 10 is a vehicle fixing member that is formed of metal (for example, iron or stainless steel) and is fixed to the hybrid vehicle main body with the electric pump 20 attached thereto. A hybrid vehicle is a vehicle that can obtain driving force for traveling from an internal combustion engine (engine) and an electric motor for traveling.

  The electric pump 20 sucks and pumps cooling water (fluid) in a cooling water circuit that circulates cooling water for cooling an inverter that supplies electric power to the electric motor for traveling. Specifically, the electric pump 20 includes an electric motor 21 that rotates when supplied with electric power, and a pump unit 22 that obtains a rotational driving force from the electric motor 21 and sucks and feeds cooling water. 23.

  In this embodiment, a DC motor is used as the electric motor 21, and a turbo pump that gives kinetic energy to the cooling water by rotating an impeller (impeller) in a pump chamber formed in the housing 23 is used as the pump unit 22. doing. Of course, an AC motor may be employed as the electric motor 21, and another type of pump may be employed as the pump unit 22.

  The housing 23 is formed in a substantially cylindrical shape extending coaxially in the rotation axis direction of the electric motor 21. Therefore, the axial direction of the electric pump 20 matches the rotational axis direction of the electric motor 21. Further, a power supply connector 24 for supplying power to the electric motor 21 from the outside is provided on the axially vertical end surface of the housing 23 on the side where the electric motor 21 is accommodated.

  On the other hand, a suction pipe 25 connected to a suction hose through which cooling water sucked into the pump part 22 flows is connected to the axially vertical end face of the housing 23 on the side where the pump part 22 is accommodated, and the pump part 22 discharges A discharge pipe 26 to which a discharge hose through which the cooling water is circulated is connected is provided.

  Further, on the side of the cylindrical outer peripheral surface of the housing 23 where the electric motor 21 is accommodated and the connector 24 is provided, the first pump portion side protruding portion 27 protruding toward the radial direction of the housing 23, that is, the outer peripheral side. Is provided. The first pump portion side protruding portion 27 is formed in a quadrangular prism shape, and is provided at two positions as targets with respect to the shaft when viewed from the axial direction of the electric pump 20.

  Further, a second pump portion side protruding portion 28 that protrudes in the radial direction of the housing 23 is provided on the side of the cylindrical outer peripheral surface of the housing 23 where the pump portion 22 is accommodated. The second pump portion side protruding portion 28 is provided in an annular shape over the entire circumference of the cylindrical outer peripheral surface of the housing 23.

  When the housing 23 is formed by dividing the housing 23 into an electric motor side housing and an electric pump side housing, the second pump portion side protruding portion 28 having such a shape is formed at a joint portion between the electric motor side housing and the electric pump side housing. It can be formed using a seal portion provided.

  More specifically, a seal structure in which a seal member (for example, an O-ring) is interposed is employed as a seal portion at a joint portion between the electric motor side housing and the electric pump side housing. Then, by forming the portion in which the seal member is accommodated in a larger diameter than the cylindrical outer peripheral portion of the housing 23, it can be used as the second pump portion side protruding portion 28.

  Next, the attachment member 30 that fixes the electric pump 20 to the bracket 10 will be described. The mounting member 30 of the present embodiment is formed in a band shape by connecting both ends of two members of a bending member 31 and a connecting member 32 formed of the same material as the bracket 10.

  Further, the mounting member 30 is annular so as to be wound around the outer peripheral side of the body portion between the first pump portion side protruding portion 27 and the second pump portion side protruding portion 28 among the cylindrical outer peripheral side of the housing 23. The electric pump 20 is held in a state where the free float packing 40 is interposed between the inner peripheral side and the outer peripheral side of the electric pump 20.

  The bending member 31 is a member that is fixed to the bracket 10 and is bent along the outer peripheral shape of the electric pump 20. More specifically, as shown in FIGS. 2 and 3, the bending member 31 includes an arcuate curved portion 31 a that is curved along the outer peripheral shape of the electric pump 20, a fixed portion 31 b that is fixed to the bracket 10, and a circle. First and second bending member side connecting portions 31c and 31d extending from both ends of the arcuate bending portion 31a and connected to the connecting member 32 are provided.

  The arcuate curved portion 31 a is a portion that is curved in a substantially semicircular arc shape when viewed from the axial direction of the electric pump 20 and is formed in a shape that matches the outer peripheral shape of the electric pump 20. The arcuate curved portion 31a is provided with a plurality of (four in this embodiment) through holes 31e penetrating the front and back surfaces thereof. The through hole 31e is formed in a long hole shape having a long axis in the circumferential direction of the housing 23, and functions as an attachment member side contact portion that contacts an elastic member side protruding portion 43 of a free float packing 40 described later.

  Further, the arcuate curved portion 31a is formed with a cutout portion 31h provided so as to fit in a cutout hole portion 41 of a free float packing 40 described later. And by forming this notch 31h, it prevents that the 1st pump part side protrusion part 27 and the bending member 31 of the electric pump 20 contact directly.

  The fixing portion 31b is a portion that is formed so as to extend from the arcuate curved portion 31a toward the bracket 10 and connects the arcuate curved portion 31a and the bracket 10 together. Specifically, the fixing portion 31b is fixed to the bracket 10 by a joining means such as welding.

  The first bending member side coupling portion 31 c is provided on one end side in the circumferential direction of the arc-shaped bending portion 31 a and is formed in a planar shape extending in the radial direction of the housing 23 when viewed from the axial direction of the electric pump 20. ing. In addition, the 1st bending member side connection part 31c is good to form in the planar shape extended toward 45 degree | times or more (this embodiment 45 degree | times) with respect to a horizontal direction.

  Furthermore, the 1st bending member side connection part 31c is formed with the bolt hole 31f which penetrates the front and back. The bolt hole 31f is used when connecting one end side of the bending member 31 and one end side of the connecting member 32 by bolting.

  The second bending member side connecting portion 31d is provided on the other end side in the circumferential direction of the arc-shaped bending portion 31a, and is a plane extending in the tangential direction of the arc-shaped bending portion 31a when viewed from the axial direction of the electric pump 20. It is formed in a shape. Further, the second bending member side connecting portion 31d is formed with a locking hole 31g penetrating the front and back. A locking claw 32c formed on the other end side of the connecting member 32 is locked in the locking hole 31g.

  Therefore, the bending member 31 is formed in a shape that is curved in a substantially U shape when viewed from the axial direction of the electric pump 20.

  The connecting member 32 is a member that bends along the outer peripheral shape of the electric pump 20 and connects both ends in the longitudinal direction of the bending member 31 (specifically, the first and second bending member side connecting portions 31c and 31d). It is. That is, both ends of the bending member 31 and the connecting member 32 are connected by the connecting member 32, so that the mounting member 30 as a whole is formed in an annular shape when viewed from the axial direction of the electric pump 20.

  More specifically, the connecting member 32 is bent along the outer peripheral shape of the electric pump 20, and extends from one end of the bending portion 32 a and is connected to the first bending member side connecting portion 31 c. A locking claw 32c that is formed at the other end of the connecting member side connecting portion 32b and the bending portion 32a and is locked in the locking hole 31g of the second bending member side connecting portion 31d is provided.

  The curved portion 32 a is a portion that is curved in an arc shape when viewed from the axial direction of the electric pump 20 and is formed in a shape that matches the outer peripheral shape of the electric pump 20. The bending portion 32a is provided with a notch portion 32g similar to the notch portion 31h and the through hole 31e of the bending member 31 and a plurality (two in this embodiment) of through holes 32d.

  The connecting member side connecting portion 32 b is provided on one end side in the longitudinal direction of the bending portion 32 a and is formed in a planar shape extending in the radial direction of the housing 23 when viewed from the axial direction of the electric pump 20. More specifically, the connecting member side connecting portion 32b is formed in a planar shape that extends parallel to the first bending member side connecting portion 31c of the bending member 31 and overlaps.

  Further, the connecting member side connecting portion 32b is formed with a bolt hole 32f similar to the first bending member side connecting portion 31c and, as shown in FIG. 1, with respect to the first bending member side connecting portion 31c. A temporarily fixing claw portion 32e for temporarily fixing the connecting member side connecting portion 32b is formed. The temporarily fixing claw portion 32e is formed in a shape bent so as to be caught on the outer peripheral side of the first bending member side connecting portion 31c.

  Next, the free float packing 40 will be described. The free float packing 40 is an elastic member that can be elastically deformed and formed of a band-shaped thermoplastic elastomer. Further, the free float packing 40 is sandwiched between the inner peripheral side of the mounting member 30 and the outer peripheral side of the electric pump 20 to suppress the vibration generated in the electric pump 20 from being transmitted to the mounting member 30. Fulfills the function.

  Moreover, the free float packing 40 of this embodiment is arrange | positioned so that it may be wound around the trunk | drum of the electric pump 20 between the inner peripheral side of the bending member 31 and the outer peripheral side of the electric pump 20 among the attachment members 30. It is divided into two members, one packing 40a and a second packing 40b arranged so as to be wound around the body of the electric pump 20 between the inner peripheral side of the connecting member 32 and the outer peripheral side of the electric pump 20. Yes.

  Although the first and second packings 40b are different in length in the longitudinal direction and the number of elastic member side protrusions 43, the basic configuration is the same. Specifically, the longitudinal length of the first packing 40a of the present embodiment is longer than the longitudinal direction of the second packing 40b, and the number of the elastic member side protrusions 43 of the first packing 40a is four. The number of the elastic member side protrusions 43 of the two packings 40b is two.

  Therefore, in the following description, the first packing 40a will be described with reference to FIG. 4A is a front view when the free float packing 40 (first packing 40a) is expanded without being bent, FIG. 4B is a top view of FIG. 4A, and FIG. It is a side view of (a).

  When the free float packing 40 is sandwiched between the inner peripheral side of the mounting member 30 and the outer peripheral side of the electric pump 20, the first pump portion side protruding portion 27 is fitted into the first float portion side protruding portion. 27, a concave cutout hole portion 41 that abuts against the side wall surface 42, a side wall surface 42 that abuts against the second pump portion side protruding portion 28, and the through holes 31 e and 32 d of the mounting member 30 that protrude toward the outer peripheral side of the electric pump 20. The elastic member side protrusion 43 to be fitted is provided.

  The cutout hole 41 is a hole formed on the side surface of the free float packing 40 on the first pump portion side protruding portion 27 side so as to penetrate the front and back. And the inner wall surface is formed so that it may contact | abut three side surfaces of the 1st pump part side protrusion part 27 formed in square pillar shape. Therefore, the notch hole portion 41 of the present embodiment functions as an elastic member side contact portion. The elastic member side projecting portion 43 is formed in a so-called mushroom shape having a substantially triangular pyramid-shaped top portion having a vertex toward the outer peripheral side of the electric pump 20 and a cylindrical root portion having an outer diameter smaller than the top portion. ing.

  Furthermore, a plurality of pump-side contact portions 44 formed so as to extend in the axial direction of the electric pump 20 and protrude toward the electric pump 29 side are provided on the surface of the free float packing 40 on the electric pump 20 side. Furthermore, a plurality of attachment member side contact portions 45 formed so as to extend in the axial direction of the electric pump 20 and protrude toward the attachment member 30 side are provided on the surface of the free float packing 40 on the attachment member 30 side. Is provided.

  And this pump side contact part 44 and the attachment member side contact part 45 are arrange | positioned so that it may not mutually overlap when it sees from the front and back direction of the free float packing 40 shown by the arrow of FIG.4 (b). Therefore, when the free float packing 40 is disposed between the inner peripheral side of the mounting member 30 and the outer peripheral side of the electric pump 20, the pump side contact portion 44 and the mounting member side contact portion 45 are connected to the electric pump 20. They are arranged so as not to overlap each other when viewed from the direction perpendicular to the axial direction.

  Next, an attachment method for attaching the electric pump 20 of the present embodiment to the bracket 10 using the attachment member 30 and the free float packing 40 will be described.

  First, the first packing 40 a of the free float packing 40 is attached to the bending member 31 of the attachment member 30. Specifically, the elastic member side protrusion 43 of the first packing 40a is fitted into the through hole 31e. As described above, since the top portion of the elastic member side protrusion 43 has a substantially triangular pyramid shape, it is possible to prevent the elastic member side protrusion 43 from coming out of the through hole 31e, and the first packing 40a is attached to the bending member 31. Can be fixed against.

  Next, the electric pump 20 is disposed on the inner peripheral side of the bending member 31 and the first packing 40a. Specifically, the first pump portion-side protruding portion 27 of the electric pump 20 is fitted into the cutout hole portion 41 of the first packing 40a, and the second pump portion-side protruding portion 28 is connected to the side wall surface 42 of the first packing 40a. The electric pump 20 is arranged so as to be in contact with the pump (pump arrangement step).

  At this time, one end and the other end of the first packing 40a are positioned at positions where the electric pump 20 is substantially targeted with respect to the shaft, and when viewed from the axial direction of the electric pump 20, of the outer periphery of the housing 23 The substantially half circumference is in contact with the inner circumferential side of the first packing 40a. Thereby, the electric pump 20 is temporarily held on the inner peripheral side of the bending member 31 and the first packing 40a.

  Next, similarly to the first packing 40 a and the bending member 31, the connecting member 32 to which the second packing 40 b is attached in advance is temporarily fixed to the bending member 31. Specifically, the connecting member 32 is disposed along the outer periphery of the electric pump 20 in a state where the locking claw 32 c of the connecting member 32 is locked in the locking hole 31 g of the bending member 31.

  At this time, similarly to the pump arrangement step, the first pump portion side protruding portion 27 of the electric pump 20 is fitted into the notch hole portion 41 of the second packing 40b, and the second pump portion side protruding portion 28 is set to the second packing. It arrange | positions so that it may contact | abut to the side wall surface 42 of 40b. And it temporarily fixes by hooking the claw part 32e for temporary fixing of the connection member 32 on the outer peripheral side of the 1st bending member side connection part 31c of the bending member 31 (pump temporary fixing process).

  Next, the bolt 50 is tightened to the nut 51 through the bolt hole 31 f of the bending member 31 and the bolt hole 32 f of the connecting member 32. Thus, the bending member 31 and the connecting member 32 are connected, and the free float packing 40 is sandwiched between the inner peripheral side of the mounting member 30 and the outer peripheral side of the electric pump 20 in a state of being compressed and deformed (pump Installation process).

  Thereby, the electric pump 20 is attached to the bracket 10. According to the mounting structure of the electric pump 20 of the present embodiment, the following excellent effects can be obtained.

  (A) In this embodiment, the electric pump 20 can be attached to the bracket 10 simply by connecting the bending member 31 and the connecting member 32 constituting the attachment member 30 in an annular shape so as to be wound around the outer peripheral side of the electric pump 20. it can. Therefore, workability when the electric pump 20 is attached to the bracket 10 can be improved as compared with the case where the attachment member 30 is attached to both the electric pump 20 and the bracket 10.

  Furthermore, the bending member 31 is curved along the outer peripheral shape of the electric pump 20, and the notch hole portion 41 and the second pump portion side protruding portion 28 into which the free float packing 40 fits the first pump portion side protruding portion 27. Since the side wall surface 42 is brought into contact, the electric pump 20 is temporarily held on the bending member 31 by utilizing the weight of the electric pump 20 or the fitting state between the bending member 31 and the electric pump in the pump placement step. can do.

  Therefore, when connecting the bending member 31 and the connecting member 32, it is not necessary for the attaching operator to support the electric pump 20, and workability when attaching the electric pump 20 to the bracket 10 can be effectively improved.

  Furthermore, the free float packing 40 is sandwiched between the outer peripheral side of the electric pump 20 and the inner peripheral side of the mounting member 30 in a compressed and deformed state by connecting the bending member 31 and the connecting member 32. Therefore, the electric pump 20 and the attachment member 30 are brought into a non-contact state, and transmission of vibration of the electric pump 20 to the attachment member 30 can be suppressed. As a result, the vibration of the electric pump 20 can be suppressed from being transmitted to the bracket 10 via the mounting member 30.

  (B) In the present embodiment, in the pump mounting step, one end portions of the bending member 31 and the connecting member 32 (specifically, the first bending member side connecting portion 31c and the connecting member side connecting portion 32b) are connected. On the other hand, the other ends are connected by locking the locking claw 32c of the connecting member 32 to the locking hole 31g of the bending member 31.

  Therefore, the workability at the time of attaching the electric pump 20 to the bracket 10 can be effectively improved as compared with the case where both ends are connected by tightening the bolt 50. At this time, the first bending member side connecting portion 31c and the connecting member side connecting portion 32b are formed in a planar shape extending in the radial direction of the housing 23 and upward by about 45 degrees with respect to the horizontal direction. Interference of the main body of the electric pump 20 with the bolt 50 can also be avoided.

  Furthermore, since one end portions of the bending member 31 and the connecting member 32 are connected by tightening the bolt 50, an unnecessary compressive load is applied to the electric pump 20 by adjusting the tightening load of the bolt 50. Thus, the electric pump 20 can be appropriately held without being lost. Similarly, since it is possible to suppress the free float packing 40 from being unnecessarily compressed and deformed to increase the rigidity, it is possible to appropriately suppress the vibration of the electric pump 20 from being transmitted to the bracket 10.

  Moreover, in the pump temporary fixing step, when the one end portions of the bending member 31 and the connecting member 32 are connected by the bolt 50, the bending member 31 and the connecting member 32 are temporarily fixed by the temporarily fixing claw portion 32e. The bolt 50 can be easily tightened, and the workability when the electric pump 20 is attached to the bracket 10 can be further effectively improved.

  (C) In the present embodiment, the first pump portion side protruding portion 27 of the electric pump 20 abuts in a state of being fitted into the notch hole portion 41 of the free float packing 40, and the second pump portion side protruding portion 28 is free. The elastic member side protruding portion 43 of the free float packing 40 is in contact with the side wall surface 42 of the float packing 40 while being fitted in the through holes 31e and 32d of the mounting member 30.

  Therefore, when connecting the attachment member 30 in an annular shape, the positioning of the free float packing 40 with respect to the electric pump 20 and the attachment member 30 is facilitated, and the position of the free float packing 40 with respect to the electric pump 20 and the attachment member 30 is facilitated. Since displacement can be prevented, workability when the electric pump 20 is attached to the bracket 10 can be effectively improved.

  Further, as described above, since the position of the free float packing 40 relative to the electric pump 20 and the mounting member 30 can be prevented, the free float packing 40 can be securely placed between the outer peripheral side of the electric pump 20 and the inner peripheral side of the mounting member 30. Can be pinched. Therefore, it is possible to effectively suppress the vibration of the electric pump 20 from being transmitted to the mounting member 30.

  Moreover, in this embodiment, since the three side surfaces of the quadrangular columnar first pump portion side protruding portion 27 and the inner peripheral surface of the notch hole portion 41 of the free float packing 40 are in contact, the electric pump 20 is attached to the bracket 10. It is possible to prevent the free float packing 40 and the attachment member 30 from being displaced in the circumferential direction of the electric pump 20 even after being attached to.

  In addition, the second pump portion side protruding portion 28 comes into contact with the side wall surface 42 of the free float packing 40, and the free float packing 40 and the mounting member 30 are connected to the first pump portion side protruding portion 27 and the second pump portion side protruding portion 28. Therefore, even after the electric pump 20 is attached to the bracket 10, it is possible to prevent the free float packing 40 and the attachment member 30 from being displaced in the axial direction of the electric pump 20.

  (D) In this embodiment, the pump-side contact portion 44 and the attachment member-side contact portion 45 of the free float packing 40 are arranged so as not to overlap each other when viewed from the direction perpendicular to the axial direction of the electric pump 20. Therefore, the elastic coefficient of the free float packing 40 can be reduced, and the vibration transmission distance from the electric pump 20 to the mounting member 30 can be increased. As a result, the vibration of the electric pump 20 can be prevented from being transmitted to the mounting member 30.

  In the present embodiment, due to the effects (A) to (D) described above, the vibration of the electric pump 20 is effectively suppressed from being transmitted to the vehicle interior via the bracket 10, and the electric pump 20 is attached to the bracket 10. It is possible to achieve a balance between effective improvement in workability when attaching to the hood.

  (E) Furthermore, since the free float packing 40 and the mounting member 30 are restrained from shifting in both the circumferential direction and the axial direction with respect to the electric pump 20, an electric wire is connected to the connector 24 of the electric pump 20. Since the electric pump 20 can be prevented from being inclined when the suction hose and the discharge hose are connected to the suction pipe 25 and the discharge pipe 26, the workability of these connection operations can be improved.

  (F) Furthermore, since the free float packing 40 and the mounting member 30 are restrained from shifting in both the circumferential direction and the axial direction with respect to the electric pump 20, when the bracket 10 is fixed to the vehicle, Even if the axial direction of the electric pump 20 is oriented in the vertical direction or the horizontal direction, the electric pump 20 can be prevented from falling off the bracket 10.

(Second Embodiment)
In the first embodiment, the example has been described in which the free float packing 40 is configured by the two members of the first packing 40a and the second packing 40a. However, in the present embodiment, as shown in FIG. An example in which a single member is formed into an annular shape (cylindrical shape) will be described. Other configurations are the same as those of the first embodiment.

  FIG. 5 is a perspective view for explaining an assembled state of the electric pump 20 and the free float packing 40 of the present embodiment. In FIG. 5, the same or equivalent parts as those in the first embodiment are denoted by the same reference numerals. The same applies to the following drawings. In FIG. 5, the illustration of the pump side contact portion 44 and the attachment member side contact portion 45 of the free float packing 40 is omitted for clarity of illustration.

  In this embodiment, since the free float packing 40 is formed in an annular shape (cylindrical shape) with one member, the mounting when the electric pump 20 of this embodiment is attached to the bracket 10 with respect to the first embodiment. The method is different.

  Specifically, first, the inner diameter of the free float packing 40 formed to be elastically deformable is expanded and fitted into the body of the electric pump 20. At this time, the first pump portion side protruding portion 27 of the electric pump 20 is fitted into the cutout hole portion 41 of the free float packing 40 and the second pump portion side protruding portion 28 is brought into contact with the side wall surface 42 of the free float packing 40. It fits in the trunk | drum of the electric pump 20 so that it may contact (packing arrangement | positioning process).

  Next, the electric pump 20 in which the free float packing 40 is fitted is attached to the bending member 31 of the attachment member 30. At this time, the elastic member side protrusion 43 of the free float packing 40 is fitted into the through hole 31 e of the bending member 31. Thereby, the electric pump 20 is temporarily fixed to the bending member 31 (pump arrangement | positioning process).

  Next, the connecting member 32 is temporarily fixed to the electric pump 20 temporarily fixed to the bending member 31. At this time, the engaging claw 32c of the connecting member 32 is engaged with the engaging hole 31g of the bending member 31 while the elastic member side protruding portion 43 of the free float packing 40 is fitted into the through hole 32d of the connecting member 32. In this state, the temporarily fixing claw portion 32e of the connecting member 32 is hooked on the outer peripheral side of the first bending member side connecting portion 31c of the bending member 31 and temporarily fixed (pump temporary fixing step).

  The subsequent steps are the same as the pump mounting step of the first embodiment. Therefore, also in the attachment structure of the electric pump 20 of this embodiment, the same effect as 1st Embodiment can be acquired.

(Third embodiment)
In the first embodiment, the example in which the attachment member 30 is configured by two separable members of the bending member 31 and the connecting member 32 has been described. However, in the present embodiment, as illustrated in FIG. An example in which the member 32 is integrally coupled to form the mounting member 30 with one member will be described. 6 is a cross-sectional view taken along the line AA of FIG. 2 in the electric pump 20 of the present embodiment, and corresponds to FIG. 3 of the first embodiment.

  The mounting member 30 of the present embodiment eliminates the locking holes 31g of the second bending member side connecting portion 31d and the locking claws 32c of the connecting member 32 in the bending member 31 of the first embodiment, It has the hinge part 30a which connects the other end parts of 31 and the connection member 32 so that bending is possible. Other configurations are the same as those of the first embodiment.

  Therefore, in the present embodiment, the first and second packings 40a, 40a, 40a, and 40b are previously attached to the attachment member 30 in a state where the hinge portion 30a is bent on the side where the bending member 31 and the connection member 32 are separated from each other. 40b is attached.

  Next, after performing the same pump arrangement process as in the first embodiment, the connecting member 32 is temporarily fixed to the bending member 31. Specifically, the hinge part 30a is bent toward the side where the bending member 31 and the connecting member 32 approach, the connecting member 32 is disposed along the outer periphery of the electric pump 20, and the temporarily fixing claw part 32e of the connecting member 32 is provided. The first bending member side connecting portion 31c of the bending member 31 is hooked and temporarily fixed (pump temporary fixing step).

  The subsequent steps are the same as the pump mounting step of the first embodiment. Therefore, also in the attachment structure of the electric pump 20 of this embodiment, the same effect as 1st Embodiment can be acquired.

  In the present embodiment, since the bending member 31 and the connecting member 32 are integrally formed, it is possible to prevent the connecting member 32 from falling off in the temporary pump fixing step, and to reduce the number of parts of the mounting member 30. it can. Furthermore, the attachment member 30 of this embodiment may be applied to the attachment structure of the second embodiment.

(Fourth embodiment)
In 1st Embodiment, the 1st pump part side protrusion part 27 is arrange | positioned at the electric motor 21 side of the attachment member 30, the notch hole part 41 is provided in the free float packing 40, and also the notch part 31h is provided in the attachment member 30. In this embodiment, as shown in FIG. 7, the first pump portion side protruding portion 27 is disposed in the substantially central portion of the mounting member 30 in the axial direction of the electric pump 20. An example will be described.

  FIG. 7 is a sectional view in the axial direction of the electric pump 20 of the present embodiment, and corresponds to FIG. 2 of the first embodiment.

  In the free float packing 40 of this embodiment, the through-hole 41a which penetrates the front and back is provided in the axial direction approximate center part of the electric pump 20 among the free float packings 40. Therefore, the inner peripheral side of the through hole 41a is in contact with the four side surfaces of the first pump portion side protruding portion 27 formed in a quadrangular prism shape.

Further, holes 31 h ′ and 32 g ′ provided so as to be fitted to the through holes 41 a of the free float packing 40 are formed in the bending member 31 and the connecting member 32 of the mounting member 30 . And by forming these hole parts 31h 'and 32g', the 1st pump part side protrusion part 27 of the electric pump 20 and the attachment member 30 are prevented from contacting directly. Other configurations are the same as those of the first embodiment.

  Therefore, also in the attachment structure of the electric pump 20 of this embodiment, the same effect as 1st Embodiment can be acquired. Furthermore, in this embodiment, since the through-hole 41a of the free float packing 40 is in contact with the four side surfaces of the first pump portion side projecting portion 27, the free float packing is attached even after the electric pump 20 is attached to the bracket 10. It can suppress that 40 and the attachment member 30 shift | deviate to the circumferential direction and axial direction of the electric pump 20. FIG.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as follows.

  (1) In each of the above-described embodiments, the example in which the electric pump mounting structure of the present invention is applied to mount an electric pump for circulating cooling water on a vehicle has been described. However, the application of the present invention is not limited to this. For example, you may apply in order to attach the electric pump for oil circulation to a vehicle. Further, the present invention may be applied to install various electric pumps for liquid pumping in a manufacturing factory or the like.

  (2) In each of the above-described embodiments, the example in which the bending member 31 of the attachment member 30 and the one end of the connecting member 32 are connected to each other by fastening the bolt 50 to the nut 51 has been described. 51 may be bonded in advance to one of the bending members 31 of the mounting member 30.

  Further, like the other ends of the bending member 31 and the connecting member 32, the locking claws provided on the other side of the locking member 31 and the connecting member 32 are provided on the other side. You may connect by latching with.

  (3) In each of the above-described embodiments, the example in which the free float packing 40 is formed of a thermoplastic elastomer has been described. However, the free float packing 40 may of course be formed of butyl rubber, silicon, or the like.

  Furthermore, when the free float packing 40 is molded, the attachment member 30 may be formed by insert molding. Moreover, you may join the attachment member 30 and the free float packing 40 previously by joining means, such as adhesion | attachment. In this case, even if the through holes 31e and 32d of the attachment member 30 and the elastic member side protrusion 43 of the free float packing 40 are eliminated, the displacement of the attachment member 30 and the free float packing 40 can be prevented.

  (4) In the above-described embodiment, the example in which the temporarily fixing claw portion 32e is provided on the connecting member 32 side has been described. Of course, the temporarily fixing claw portion 32e may be provided on the bending member 31 side. Similarly, in the above-described embodiment, the example in which the locking hole 31g is provided on the bending member 31 side and the locking claw 32c is provided on the connecting member 32 side has been described, but the locking claw is provided on the bending member 31 side. And a locking hole may be provided on the connecting member 32 side.

DESCRIPTION OF SYMBOLS 10 Bracket 20 Electric pump 27, 28 1st, 2nd pump part side protrusion part 30 Attachment member 31 Curved member 31c, 31d 1st, 2nd curve member side connection part 31e Through-hole 31g Locking hole 32 Connection member 32b Connection Member side connecting portion 32c Locking claw 32d Through hole 32e Temporary fixing claw portion 40 Free float packing 41 Notch hole portion 42 Side wall surface 43 Elastic member side protruding portion 44 Pump side contact portion 45 Mounting member side contact portion 50 Bolt

Claims (10)

An attachment structure for attaching an electric pump (20) for sucking and feeding a fluid to an attachment target member (10),
A belt-shaped mounting member (30) that is fixed to the mounting target member (10) and is annularly disposed on the outer peripheral side of the electric pump (20);
An elastic member (40) which is arranged between the outer peripheral side of the electric pump (20) and the inner peripheral side of the mounting member (30) and is elastically deformable;
The mounting member (30) is annularly disposed on the outer peripheral side of the electric pump (20), and the elastic member (40) is disposed on the outer peripheral side of the electric pump (20) and the inner periphery of the mounting member (30). The electric pump (20) is held on the inner peripheral side of the mounting member (30) in a state of being sandwiched between the mounting member (30) and
On the outer peripheral surface of the electric pump (20), pump part side protrusions (27, 28) protruding toward the outer peripheral side of the electric pump (20) are formed,
The elastic member (40) is formed with elastic member side abutting portions (41, 42) that abut on the pump portion side protruding portions (27, 28), and the outer peripheral side of the electric pump (20). An elastic member side protrusion (43) protruding toward the
The attachment member (30) is formed with attachment member side contact portions (31e, 32d) that contact the elastic member side protruding portion (43) ,
The elastic member side contact portion is formed by a hole (41) formed so as to penetrate the front and back of the elastic member (40),
The mounting member (30) is provided with notches (31h, 32g) that fit into the hole (41),
The pump-side protrusion (27) is fitted into the hole (41), and the notch (31h, 32g) directly connects the pump-side protrusion (27) and the mounting member (30). An electric pump mounting structure characterized by preventing contact . The pump part side protrusion fitted into the hole (41) is a first pump part side protrusion (27), and is a second pump part side protrusion different from the first pump part side protrusion (27). A portion (28) is provided on the outer peripheral surface of the electric pump (20);
As the elastic member side contact portion, in addition to the hole portion (41), a surface (42) perpendicular to the axial direction of the electric pump (20) of the elastic member (40) is provided.
2. The electric pump mounting structure according to claim 1 , wherein the second pump portion side protruding portion (28) is in contact with a surface (42) perpendicular to the axial direction . The attachment member (30) includes a bending member (31) fixed to the attachment target member (10) and curved along the outer peripheral shape of the electric pump (20), and both ends of the bending member (31). Consists of connecting members (32) to be connected,
The said bending member (31) and the said connection member (32) are connected, The said attachment member (30) is arrange | positioned cyclically | annularly at the outer peripheral side of the said electric pump (20), The mounting structure of the electric pump of 1 or 2 . One ends of the bending member (31) and the connecting member (32) are connected by tightening a bolt (50),
The electric pump mounting structure according to claim 3 , wherein the elastic member (40) is compressed and deformed as the bolt (50) is tightened. At least one of the one end portion (31c) of the bending member (31) and the one end portion (32b) of the connection member (32) connected by being tightened by the bolt (50) is temporarily fixed to the other. The mounting structure for an electric pump according to claim 4 , wherein a temporarily fixing claw portion (32e) is formed. The other ends of the bending member (31) and the connecting member (32) are provided on at least one of the other end (31d) of the bending member (31) and the other end of the connecting member (32). 6. The locking hole (31g) provided is connected by locking a locking claw (32c) provided on the other side, according to any one of claims 3 to 5. Electric pump mounting structure. The said attachment member (30) is comprised by the one member which integrally formed the cyclic | annular form curved along the outer periphery shape of the said electric pump (20), The Claim 1 or 2 characterized by the above-mentioned. Electric pump mounting structure. The electric pump mounting structure according to any one of claims 1 to 7 , wherein the mounting member (30) and the elastic member (40) are joined to each other and integrally formed. A pump-side contact portion (44) formed to protrude toward the electric pump (20) side is provided on the surface of the elastic member (40) on the electric pump (20) side,
Furthermore, the attachment member side contact part (45) formed so that it may protrude toward the said attachment member (30) side is provided in the surface at the side of the said attachment member (30) among the said elastic members (40). ,
The pump side contact portion (44) and the mounting member side contact portion (45) are arranged so as not to overlap each other when viewed from a direction perpendicular to the axial direction of the electric pump (20). The mounting structure for an electric pump according to any one of claims 1 to 8 , wherein the mounting structure is an electric pump. The elastic member (40) is composed of one annular member disposed between the outer peripheral side of the electric pump (20) and the inner peripheral side of the mounting member (30). An electric pump mounting structure according to any one of claims 1 to 9.

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