JP2013239478A - Electromagnetic drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic drive device capable of restraining a foreign matter inside the electromagnetic drive device, as well as restraining a manufacturing man-hour from increasing.SOLUTION: The electromagnetic drive device comprises: a first cylindrical member 30 having a fitting section 31 and a projection section 32 projecting from the fitting section 31 in a radial direction; a second member 40 having a cylinder section 41 fluid-tightly fitted with the fitting section 31 on its inner peripheral side; a movable body 10 reciprocating in an axial direction on inner peripheral sides of the first member 30 and the second member 40; and a drive source 20 provided on an outer peripheral side of the first member 30 and electromagnetically driving the movable body 10. The fitting section 31 has a groove 31b opened toward an outer peripheral face 31a on the projection section 32 side. While an opening side end 41e of the cylinder section 41 is in contact with the projection section 32, the outer peripheral face 31a of the fitting section 31 and an inner peripheral face 41a of the cylinder section 41 are fixed to each other with an adhesive 80.

Description

  The present invention relates to an electromagnetic drive device.

  2. Description of the Related Art Conventionally, an electromagnetic driving device including a movable body that reciprocates in an axial direction and a drive source that electromagnetically drives the movable body is known. Such an electromagnetic drive device is suitably used for, for example, an electromagnetic valve that drives a drive target around the engine of the vehicle in accordance with the reciprocating movement of the movable body.

  The electromagnetic drive device shown in Patent Document 1 includes a fitting member, a cylindrical first member having a protruding portion protruding radially from the fitting portion, and a second member having a cylindrical portion. The first member covers the outer peripheral side of the movable body and is provided on the inner peripheral side of the drive source, and a fitting portion is fitted on the inner peripheral side of the cylindrical portion. Since this electromagnetic drive device introduces a liquid such as engine oil into the inside, it is necessary to seal the inside of the inside in a fluid-tight manner. Therefore, a structure in which the outer peripheral surface of the fitting portion and the inner peripheral surface of the cylindrical portion are fixed with an adhesive is widely used.

Special table 2009-545867

  However, in the structure in which the fitting portion of the first member and the cylindrical portion of the second member are fixed to each other by the adhesive, the adhesive may leak when the fitting portion is fitted to the inner peripheral side of the cylindrical portion. is there. The leaked adhesive may become a foreign substance that causes operational problems when cured inside the electromagnetic drive. Therefore, after the first member and the second member are fixed to each other, it is necessary to remove the leaked adhesive, which increases the number of manufacturing steps.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an electromagnetic drive device that achieves both suppression of the generation of foreign matter inside the electromagnetic drive device and suppression of an increase in manufacturing man-hours. There is.

  In the electromagnetic drive device of the present invention, a tubular first member having a fitting portion, a protruding portion protruding in the radial direction from the fitting portion, and the fitting portion are fluid-tightly fitted to the inner peripheral side. A second member having a cylindrical portion, a movable member that reciprocally moves the inner periphery of the first member and the second member in the axial direction, a drive source that is provided on the outer periphery of the first member and electromagnetically drives the movable member; The fitting portion has a groove on the protruding portion side that opens toward the outer peripheral surface, and the outer peripheral surface of the fitting portion and the cylinder in a state where the opening side end portion of the cylindrical portion is in contact with the protruding portion. The inner peripheral surface of the part is fixed with an adhesive.

  According to the present invention, the projecting portion of the first member projecting radially from the fitting portion is in contact with the opening side end of the cylindrical portion of the second member, and in this state, the outer peripheral surface of the fitting portion and the cylinder The inner peripheral surface of the part is fixed with an adhesive. At the time of manufacturing the electromagnetic drive device that realizes such fixing, the movable body moves on the inner peripheral side of the first member and the second member through the fitting interface between the outer peripheral surface of the fitting portion and the inner peripheral surface of the cylindrical portion. There is concern about the situation where adhesive leaks into the area. However, in the present invention, the fitting portion that is fitted to the inner peripheral side of the cylindrical portion further includes a groove that opens toward the outer peripheral surface on the protruding portion side where the opening side end portion of the cylindrical portion abuts. A space can be secured by the groove at the fitting interface between the outer peripheral surface of the joint portion and the inner peripheral surface of the cylindrical portion. Therefore, when the fitting portion is fitted to the cylinder portion, the adhesive is captured in the space secured by the groove, so that it is difficult for the adhesive to leak into the moving region of the movable body. Therefore, it is possible to achieve both suppression of the leaked adhesive curing inside the electromagnetic drive device to become a foreign substance, and suppression of increase in the number of manufacturing steps due to the addition of the leaked adhesive removal process. It is.

  As a further feature of the present invention, the cylindrical portion has a chamfered portion formed by chamfering the inner peripheral surface of the opening side end portion. According to such a feature, the inner peripheral surface of the opening side end portion that fits into the fitting portion and comes into contact with the protruding portion of the cylindrical portion is chamfered and has a chamfered portion. A space can be secured between the fitting portion and the protruding portion. That is, not only the space by the groove but also the space by the chamfered portion can be secured at the fitting interface between the outer peripheral surface of the fitting portion and the inner peripheral surface of the cylindrical portion, so that the fitting portion is fitted to the cylindrical portion. It is possible to make it difficult for the adhesive at the time of capture to be caught in these spaces and leaked to the moving region of the movable body. In addition, since the chamfered portion increases the inner diameter of the inner peripheral surface of the opening side end portion of the cylindrical portion, the fitting portion can be easily fitted into the opening side end portion having a large inner diameter, thereby improving manufacturing workability. According to the above, it is possible to improve the manufacturing workability while suppressing the generation of foreign matters inside the electromagnetic drive device and the increase in the number of manufacturing steps.

  Further, as a further feature of the present invention, the inner peripheral surface of the cylindrical portion has an adhesive portion that is adjacent to the chamfered portion in the axial direction and has a predetermined axial length and is bonded to the outer peripheral surface of the fitting portion. In the outer peripheral surface of the fitting portion, the groove opens in a range in which the axial distance from the protruding portion is equal to or less than the axial length of the chamfered portion. According to such a feature, the groove on the outer peripheral surface of the fitting portion opens in a range where the axial distance from the protruding portion is equal to or less than the axial length of the chamfered portion, and the fitting portion of the inner peripheral surface of the cylindrical portion. The adhering portion to be bonded to the outer peripheral surface of the chamfer is adjacent to the chamfered portion in the axial direction, so that the groove and the adhering portion are arranged at different positions in the axial direction. As a result, the bonding portion can be bonded to the outer peripheral surface of the fitting portion over the entire predetermined axial length, so that the bonding portion and the fitting portion are bonded by a groove opened in the outer peripheral surface of the fitting portion. A reduction in area can be avoided. Therefore, the effect of increasing the fixing strength between the first member and the second member by securing the bonding area is exhibited while exhibiting the suppressing effect on the generation of foreign matters and the increase in the number of manufacturing steps by capturing the adhesive in the groove. However, it becomes possible.

It is a fragmentary sectional view showing the electromagnetic drive device by a first embodiment. It is sectional drawing which expands and shows the principal part of FIG. It is explanatory drawing explaining the manufacturing method of the electromagnetic drive device by 1st embodiment, and has shown the application | coating process. It is explanatory drawing explaining the manufacturing method of the electromagnetic drive device by 1st embodiment, and has shown the fitting process. It is sectional drawing which expands and shows the principal part of the electromagnetic drive device by 2nd embodiment. It is explanatory drawing explaining the manufacturing method of the electromagnetic drive device by 2nd embodiment, (a) After the fitting process, (b) The caulking process is shown. It is sectional drawing which expands and shows the principal part of the electromagnetic drive device by the modification 1 of 1st embodiment. It is sectional drawing which expands and shows the principal part of the electromagnetic drive device by the modification 2 of 1st embodiment. It is sectional drawing which expands and shows the principal part of the electromagnetic drive device by the modification 4 of 2nd embodiment. It is sectional drawing which expands and shows the principal part of the electromagnetic drive device by the modification 5 of 2nd embodiment. It is sectional drawing which expands and shows the principal part of the electromagnetic drive device by the modification 6 of 1st embodiment.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In addition, the overlapping description may be abbreviate | omitted by attaching | subjecting the same code | symbol to the corresponding component in each embodiment. When only a part of the configuration is described in each embodiment, the configuration of the other embodiment described above can be applied to the other part of the configuration. In addition, not only combinations of configurations explicitly described in the description of each embodiment, but also the configurations of a plurality of embodiments can be partially combined even if they are not explicitly specified unless there is a problem with the combination. .

(First embodiment)
The electromagnetic drive device 1 according to the first embodiment of the present invention shown in FIG. 1 drives a drive target (not shown) around the engine of the vehicle, and is fixed to the engine via a support portion 2.

(Basic configuration)
Hereinafter, the basic configuration of the electromagnetic drive device 1 will be described. The electromagnetic drive device 1 includes a movable body 10, a first housing 30 as a “first member”, a second housing 40 as a “second member”, and a drive source 20.

  The movable body 10 has a movable core 11 and a shaft 12. The movable core 11 is formed in a cylindrical shape from a metal magnetic material such as iron, and is housed in the inner peripheral side of the second housing 40 so as to be reciprocally movable in the axial direction. The shaft 12 is formed of a metal in a cylindrical shape, and is accommodated in the inner peripheral side of the first housing 30 and the second housing 40 so as to be capable of reciprocating in the axial direction. The shaft 12 is coaxially coupled to the movable core 11 and has an axial end opposite to the movable core 11 connected to a drive target (not shown).

  The first housing 30 is formed in a cylindrical shape from a metal magnetic material, and includes a fitting portion 31, a protruding portion 32, and a guide portion 33. The disc-shaped fitting part 31 slides and supports the shaft 12 coaxially from the outer peripheral side. The protruding portion 32 having a thicker disc shape than the fitting portion 31 protrudes radially outward from the axial end of the fitting portion 31 on the side opposite to the movable core 11, thereby allowing the shaft 12 to move from the outer peripheral side. It is slidably supported on the same axis. The guide portion 33 having a cylindrical shape smaller than the protruding portion 32 extends from the axial end portion of the fitting portion 31 opposite to the movable core 11 with a substantially constant inner diameter in the axial direction, thereby allowing the shaft 12 to It is slidably supported on the same axis from the side.

  The second housing 40 is formed in a bottomed cylindrical shape using a metal magnetic material such as iron and is coaxially coupled to the first housing 30 on the outer peripheral side of the movable core 11 and the shaft 12. The second housing 40 has a cylindrical tube portion 41 on the first housing 30 side. On the inner peripheral side of the cylindrical portion 41, the fitting portion 31 is fitted coaxially and fixed by an adhesive 80, so that it fits with the inner peripheral surface 41a of the cylindrical portion 41 as shown in FIG. A space between the outer peripheral surface 31a of the joint portion 31 is fluid-tightly sealed. At the same time, the end surface of the opening-side end portion 41 e that is the axial end portion on the first housing 30 side in the cylindrical portion 41 is in contact with the end surface on the fitting portion 31 side of the protruding portion 32 in the axial direction.

  As described above, the first housing 30 and the second housing 40 are configured so that the opening-side end portion 41 e of the cylindrical portion 41 is in contact with the end surface of the protruding portion 32, and the inner peripheral surface 31 a of the fitting portion 31 and the inner portion of the cylindrical portion 41. It is fixed with an adhesive 80 between the peripheral surface 41a. Here, as the adhesive 80, for example, an anaerobic adhesive 80 capable of adhering the metal housings 30 and 40 to each other in a state where air is blocked is preferably used. By press-fitting the fitting part 31 into the air, the air is shut off and bonded and fixed.

  In the present embodiment, engine oil such as paraffin oil and ester oil is introduced into the inner peripheral side of the second housing 40. As a result, the oil plays a role of lubricating oil for reducing the sliding resistance of the movable body 10 on the inner peripheral side of each housing 30 and 40 that secures the moving region of the movable body 10 as the inside of the electromagnetic drive device 1. Here, as described above, between the inner peripheral surface 41a of the cylindrical portion 41 and the outer peripheral surface 31a of the fitting portion 31 is fluid-tightly sealed, so that oil leaks out of the housings 30 and 40. Is regulated.

  The drive source 20 shown in FIG. 1 is a solenoid coil in which a metal conductor such as an enamel wire is wound around a resin insulating material, and is coaxially accommodated inside the second housing 40 on the outer peripheral side of the movable core 11. ing. The drive source 20 electromagnetically drives the movable core 11 in the axial direction by generating a magnetic flux that passes through the first housing 30, the second housing 40, and the movable core 11 when energized from the outside.

(Characteristic configuration)
Next, the characteristic configuration of the first embodiment will be described in detail.

  As shown in FIG. 2, the inner peripheral surface 41 a of the opening-side end 41 e of the cylindrical portion 41 is chamfered into a tapered surface shape whose inner diameter increases toward the protruding portion 32 on which the end 41 e abuts. Thus, a chamfered portion 41b is formed. In addition, the inner peripheral surface 41a of the portion of the cylindrical portion 41 that is adjacent to the chamfered portion 41b in the axial direction on the opposite side of the protruding portion 32 is in the press-fitted state with the outer peripheral surface 31a of the fitting portion 31. An adhesive portion 41d to be bonded to the surface 31a is formed. The axial length Ld of the bonding portion 41d is set to a length sufficient to ensure the fixing strength between the fitting portion 31 and the cylindrical portion 41, and the axial length Lo of the chamfered portion 41b is the bonding portion. It is predetermined according to the axial length Ld of 41d.

  A groove 31b that opens toward the outer peripheral surface 31a is provided at the axial end of the fitting portion 31 on the protruding portion 32 side. Here, the groove 31b of the present embodiment is formed in an annular concave shape extending across the entire circumferential direction of the outer peripheral surface 31a. At the same time, the groove 31b opens in a range in which the axial distance Li from the protrusion 32 on the outer peripheral surface 31a of the fitting portion 31 is less than or equal to the axial length Lo of the chamfered portion 41b. The depth of the groove 31b is appropriately determined according to the application amount of the adhesive 80 at the time of manufacturing described in detail later.

  With the above configuration, a space 31c is secured in the groove 31b, and a space 41f is secured between the chamfered portion 41b, the fitting portion 31, and the protruding portion 32 in a state of communicating with each other. Between the space 31c, 41f thus secured and the moving region of the movable body 10 secured on the inner peripheral side of the second housing 40, the adhesive portion 41d of the cylindrical portion 41 and the outer peripheral surface 31a of the fitting portion 31 are provided. Is present in a sealed state by the adhesive 80.

(Production method)
Next, the manufacturing method of the first embodiment will be described in detail.

  First, in the application step shown in FIG. 3, the adhesive 80 is applied to substantially the entire outer peripheral surface 31 a of the fitting portion 31 excluding the opening portion of the groove 31 b. At this time, the adhesive 80 is not applied to the inner peripheral surface 41 a including the bonding portion 41 d that is the bonding target of the fitting portion 31 in the cylindrical portion 41.

  Next, in the fitting process shown in FIG. 4, the fitting part 31 to which the adhesive 80 is applied in the application process is press-fitted into the inner peripheral side of the cylindrical part 41. In other words, the tubular portion 41 is fitted on the outer peripheral side of the fitting portion 31. In such a fitting step, the adhesive 80 is pushed out toward the protruding portion 32 by the chamfered portion 41b of the cylindrical portion 41 as shown in FIG. As a result, the adhesive 80 flows into the spaces 31c and 41f secured by the groove 31b and the chamfered portion 41b as shown in FIG. 4B, and is captured in the spaces 31c and 41f as shown in FIG.

(Function and effect)
According to the first embodiment described so far, the opening side end portion 41e of the cylindrical portion 41 of the second housing 40 abuts on the protruding portion 32 protruding in the radial direction from the fitting portion 31 in the first housing 30, In this state, the outer peripheral surface 31 a of the fitting portion 31 and the inner peripheral surface 41 a of the tube portion 41 are fixed with the adhesive 80. At the time of manufacturing the electromagnetic drive device 1 that realizes such fixing, the inside of the first housing 30 and the second housing 40 through the fitting interface between the outer peripheral surface 31a of the fitting portion 31 and the inner peripheral surface 41a of the cylindrical portion 41. There is concern about the situation where the adhesive 80 leaks into the moving region of the movable body 10 on the peripheral side. However, in the first embodiment, the fitting portion 31 that is fitted to the inner peripheral side of the cylindrical portion 41 is further toward the outer peripheral surface 31a on the protruding portion 32 side that the opening side end portion 41e of the cylindrical portion 41 contacts. Since the groove 31b is open, a space 31c can be secured by the groove 31b at the fitting interface between the outer peripheral surface 31a of the fitting portion 31 and the inner peripheral surface 41a of the cylindrical portion 41. Therefore, when the fitting part 31 is fitted to the cylinder part 41, the adhesive 80 is captured in the space 31 c secured by the groove 31 b, so that it is difficult to leak into the moving region of the movable body 10. Therefore, both the suppression of the leaked adhesive 80 being cured inside the electromagnetic driving device 1 to become a foreign substance and the suppression of an increase in the number of manufacturing steps due to the addition of the removal process of the leaked adhesive 80 are achieved at the same time. It becomes possible.

  Furthermore, since the inner peripheral surface 41a of the opening end 41e that fits into the fitting portion 31 and contacts the protruding portion 32 of the cylindrical portion 41 is chamfered and has a chamfered portion 41b, the chamfered portion A space 41f can be secured between 41b and the fitting portion 31 and the protruding portion 32. That is, not only the space 31c by the groove 31b but also the space 41f by the chamfered portion 41b can be secured at the fitting interface between the outer peripheral surface 31a of the fitting portion 31 and the inner peripheral surface 41a of the cylindrical portion 41. The adhesive 80 when the portion 31 is fitted to the cylindrical portion 41 can be reliably captured in the spaces 31c and 41f and hardly leaked to the moving region of the movable body 10. In addition, since the chamfered portion 41b increases the inner diameter of the inner peripheral surface 41a of the opening side end 41e of the cylindrical portion 41, the fitting portion 31 can be easily fitted into the opening side end 41e having a larger inner diameter. Improves. According to the above, it is also possible to improve the manufacturing workability while suppressing the generation of foreign matters and the increase in the number of manufacturing steps inside the electromagnetic drive device 1.

  Further, the groove 31b of the outer peripheral surface 31a of the fitting portion 31 opens in a range in which the axial distance Li from the protruding portion 32 is equal to or less than the axial length Lo of the chamfered portion 41b, and the inner peripheral surface 41a of the cylindrical portion 41 is opened. Among them, the adhering portion 41d bonded to the outer peripheral surface 31a of the fitting portion 31 is adjacent to the chamfered portion 41b in the axial direction, so that the groove 31b and the adhering portion 41d are arranged at different positions in the axial direction. As a result, the bonding portion 41d can be bonded to the outer peripheral surface 31a of the fitting portion 31 in the entire region of the predetermined axial length Ld, so that the bonding portion is formed by the groove 31b opened in the outer peripheral surface 31a of the fitting portion 31. It can avoid that the adhesion area of 41d and the fitting part 31 reduces. Therefore, the effect of increasing the fixing strength between the first housing 30 and the second housing 40 by securing the bonding area while exhibiting the suppressing effect on the generation of foreign matters and the increase in the number of manufacturing steps by capturing the adhesive 80 in the groove 31b. Is also possible.

  In addition, the groove 31b provided over the entire area in the circumferential direction on the outer peripheral surface 31a of the fitting portion 31 that fits with the inner peripheral surface 41a of the cylindrical portion 41 is between the inner peripheral surface 41a of the cylindrical portion 41. A space 31c having as large a volume as possible can be secured. According to this, even when the amount of the adhesive 80 is large, the adhesive 80 can be captured in the space 31c secured by the groove 31b and can hardly be leaked to the moving region of the movable body 10. It becomes possible to increase the reliability of the suppression effect with respect to generation and increase in the number of manufacturing steps.

  In addition, when the outer peripheral surface 31 a of the fitting portion 31 to which the adhesive 80 is applied is fitted to the inner peripheral surface 41 a of the cylindrical portion 41, the adhesive 80 is used as the outer peripheral surface of the fitting portion 31. 31a is pushed out toward the protruding portion 32 by the inner peripheral surface 41a of the cylindrical portion 41. As a result, the adhesive 80 flows into and is captured by the groove 31b provided on the protruding portion 32 side on the outer peripheral surface 31a of the fitting portion 31, so that the outer peripheral surface 31a and the tubular portion of the fitting portion 31 are captured. It is possible to regulate the leakage from the fitting interface with the inner peripheral surface 41 a of 41 to the side opposite to the protruding portion 32 and reaching the moving region of the movable body 10. According to this, it becomes possible to improve the certainty of the suppression effect regarding the generation of foreign matters and the increase in the number of manufacturing steps.

(Second embodiment)
As shown in FIG. 5, the second embodiment of the present invention is a modification of the first embodiment. The cylinder part 241 of the second embodiment has a caulking part 241c that protrudes from the opening side end part 41e to the inner peripheral side and is caulked in the groove 31b. Here, the caulking portion 241 c of the present embodiment is formed in an annular convex shape that extends over the entire circumferential direction of the cylindrical portion 241.

  In such a manufacturing method of the second embodiment, the caulking process is performed after the application process and the fitting process are performed according to the first embodiment. In this caulking step, before the adhesive 80 is cured, the opening side end portion 41e of the cylindrical portion 241 is plastically deformed from the fitting state of FIG. 6A to the inner peripheral side by pressing or the like as shown in FIG. 6B. Let As a result, in the state where the opening-side end portion 41e is caulked in the entire circumferential direction with respect to the groove 31b to form the caulking portion 241c, a curing process is performed in which the adhesive 80 is left to cure for a predetermined time. As shown in FIG. 5, the housings 30 and 40 are fixed to each other.

  In the second embodiment described above, the caulking portion 241c of the cylindrical portion 241 protrudes toward the inner peripheral side and is caulked in the groove 31b of the fitting portion 31. Therefore, the opening-side end portion 41e and the protruding portion 32 of the cylindrical portion 241 are provided. Even if a force in a separation direction in which the two are separated from each other is applied to the fitting portion 31 and the cylindrical portion 241, the fitting portion 31 and the cylindrical portion 241 are difficult to separate from each other. According to this, the fixing strength between the first housing 30 and the second housing 40 can be increased by the adhesive 80 and the caulking structure.

  Further, the adhesive 80 between the inner peripheral surface 41a of the cylindrical portion 241 and the outer peripheral surface 31a of the fitting portion 31 is cured in a state where the cylindrical portion 241 is caulked in the groove 31b of the fitting portion 31. Therefore, the caulking state can be maintained as a product. According to this, even if the force in the separation direction in which the opening side end portion 41 e of the cylindrical portion 241 and the protruding portion 32 are separated from each other is applied to the fitting portion 31 and the cylindrical portion 241, the fitting portion 31 and the cylindrical portion 241. Since it becomes difficult to separate from each other, the fixing strength of the first housing 30 and the second housing 40 can be increased in combination with the action of the adhesive 80.

(Other embodiments)
Although a plurality of embodiments of the present invention have been described above, the present invention is not construed as being limited to these embodiments, and various embodiments and combinations can be made without departing from the scope of the present invention. Can be applied.

  Specifically, as for the groove 31b in the first embodiment and the second embodiment, the outer periphery of the fitting portion 31 is shown in FIG. 7 as modified example 1 (FIG. 7 is modified example 1 of the first embodiment). You may open also to the end surface by the side of the fitting part 31 of the surface 31a and the protrusion part 32. FIG. Moreover, about the groove | channel 31b in 1st embodiment and 2nd embodiment, as FIG. 8 shows the modification 2 (FIG. 8 is the modification 2 of 1st embodiment), the axis | shaft of the chamfer 41b from the protrusion part 32 is shown. The axial width Lw may be shorter than the axial distance Li defined in a range that is equal to or less than the direction length Lo. Furthermore, as a third modification of the first embodiment and the second embodiment, even if the groove 31b is opened in a range in which the axial distance Li from the protruding portion 32 exceeds the axial length Lo of the chamfered portion 41b. Good. Furthermore, in the first embodiment and the second embodiment, the groove 31b is arranged in the circumferential direction of the fitting portion 31 as shown in FIG. 9 in Modification 4 (Modification 4 in the second embodiment). It may be provided in a part.

  In addition, in the second embodiment, the caulking portion 241c may be provided in a part in the circumferential direction of the cylindrical portion 241 as shown in Modifications 4 and 5 in FIGS. In addition, in the first and second embodiments, the chamfered portion 41b may be formed in a curved shape as shown in FIG. 11 (Modification 6 of the first embodiment is shown in FIG. 11). . In addition, as a modified example 7 of the first and second embodiments, the chamfered portion 41b may not be provided. Furthermore, as a modification 8 of the first embodiment and the second embodiment, it is not necessary to introduce oil into the first housing 30 and the second housing 40. And this invention may apply the 1st member 30 and the 2nd member 40 to elements other than the 1st and 2nd housings 30 and 40 like 1st and 2nd embodiment, as long as the feature is provided. .

DESCRIPTION OF SYMBOLS 1 Electromagnetic drive device, 10 Movable body, 20 Drive source, 30 1st housing, 31 Fitting part, 31a Outer peripheral surface, 31b Groove, 31c, 41f Space, 32 Projection part, 40 Second housing, 41,241 Tube part, 41a Inner peripheral surface, 41b Chamfered portion, 41d Adhesive portion, 41e Open side end portion, 80 Adhesive, 241c Caulking portion

Claims (7)

A tubular first member (30) having a fitting portion (31) and a protruding portion (32) protruding in a radial direction from the fitting portion;
A second member (40) having a cylindrical portion (41, 241) in which the fitting portion is fluid-tightly fitted on the inner peripheral side;
A movable body (10) reciprocally moving in the axial direction on the inner peripheral side of the first member and the second member;
A drive source (20) provided on the outer peripheral side of the first member and electromagnetically driving the movable body,
The fitting portion has a groove (31b) that opens toward the outer peripheral surface (31a) on the protruding portion side,
The outer peripheral surface of the fitting portion and the inner peripheral surface (41a) of the cylindrical portion are fixed with an adhesive (80) in a state where the opening side end portion (41e) of the cylindrical portion is in contact with the protruding portion. An electromagnetic drive device.   2. The electromagnetic drive device according to claim 1, wherein the cylindrical portion has a chamfered portion (41 b) formed by chamfering an inner peripheral surface of the opening-side end portion. The inner peripheral surface of the cylindrical portion has an adhesive portion (41d) adjacent to the chamfered portion in the axial direction and having a predetermined axial length and bonded to the outer peripheral surface of the fitting portion,
3. The electromagnetic driving device according to claim 2, wherein the groove opens in a range in which an axial distance from the protruding portion is equal to or less than an axial length of the chamfered portion on an outer peripheral surface of the fitting portion. .   The said groove | channel is provided over the whole region of the circumferential direction in the outer peripheral surface of the said fitting part, The electromagnetic drive device as described in any one of Claims 1-3 characterized by the above-mentioned.   5. The electromagnetic drive device according to claim 1, wherein the cylindrical portion (241) includes a caulking portion (241 c) that protrudes toward an inner peripheral side and is caulked in the groove. 6. A method for manufacturing the electromagnetic drive device according to any one of claims 1 to 5,
An application step of applying the adhesive to the outer peripheral surface of the fitting portion;
A fitting step of fitting the fitting portion to which the adhesive is applied in the coating step to an inner peripheral side of the cylindrical portion (41, 241). . A caulking step for caulking the cylindrical portion (241) fitted in the fitting step into the groove;
The method for manufacturing an electromagnetic drive device according to claim 6, further comprising a curing step of curing the adhesive in a state of being caulked in the caulking step.

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