JPH0721979Y2 - Electromagnetic actuator - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yoke and a fixed core which are arranged at a distance from each other along the moving direction of a plunger, and a collar portion which is arranged so as to face each other and is connected to the yoke and the fixed core, respectively. And an coil which surrounds the yoke and the fixed core and is disposed between both flanges via a bobbin.

[0002]

2. Description of the Related Art Conventionally, such an electromagnetic actuating device is already known, for example, from Japanese Patent Laid-Open No. 1-316582.
When connecting the external lead wire to the coil, the external lead wire is connected to the lead wire connected to the coil via a coupler or the like.

[0003]

However, in the above-mentioned conventional device, the coil and the lead wire are connected in the bobbin, which not only complicates the connecting work but also makes the bobbin structure complicated. . Moreover, the connecting portion of the coil and the lead wire is covered with a molding resin or the like,
Since the connecting portion cannot be visually recognized after assembly, it is difficult to manage after assembly.

The present invention has been made in view of such circumstances, and makes it possible to easily connect the coil and the external lead wire while facilitating the management after the connection and avoiding the complicated bobbin shape. It is an object of the present invention to provide an electromagnetic actuator having the above-mentioned structure.

[0005]

In order to achieve the above object, according to the present invention, a bobbin is provided with a pair of protrusions which respectively project the end portions of the coil and penetrate one of the collar portions. An end plate made of synthetic resin is brought into contact with and fixed to the outer surface of the one flange portion, and the end plate has an insertion hole through which the end portion of the coil can be inserted and pulled out to the outside. A pair of conductive metal terminal assemblies in which a first terminal that can be connected to the end of the coil is connected to the outer surface side of the coil and a second terminal that is connected to an external lead wire is connected to the outer surface side of the end plate. Is buried.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention, and FIG. 1 is a vertical cross-sectional view of a linear solenoid to which the present invention is applied during operation, which is a cross-sectional view taken along line 1-1 of FIG. 2, FIG. 2 is a longitudinal sectional view corresponding to FIG. 1 when not in operation, FIG. 3 is a plan view taken in the direction of arrow 3 in FIG. 1, FIG. 4 is a perspective view of the terminal assembly showing the end plate in a see-through state, and FIG. FIG. 6 is an exploded perspective view of the terminal assembly, and FIG. 6 is an exploded vertical sectional view of the linear solenoid showing a state at the time of assembly.

First, in FIGS. 1 and 2, a linear solenoid LS as an electromagnetic actuating device exerts a thrust corresponding to an input electric quantity, and includes a housing 2, a coil 4 wound around the housing 2, A plunger 5 axially movably supported by the housing 2 so as to be attracted by magnetic lines of force formed by the coil 4 and a shaft 6 coaxially connected to the plunger 5 are provided. Be connected. Moreover, the shaft 6 and the plunger 5 are spring-biased from the actuated member side to the upper side in FIGS. 1 and 2.

The housing 2 is formed of a magnetic metal in a cylindrical shape, and the yoke 7 is coaxially arranged at a position spaced apart from the yoke 7 in the axial direction, and is formed of a magnetic metal in a substantially cylindrical shape. Fixed core 8 and a first flange portion 9 which is integrally connected to one end (upper end in FIGS. 1 and 2) of the yoke 7 in the axial direction and extends radially outward from the yoke 7, the yoke 7 and the fixed core. A second flange portion 10 that is continuously provided on the fixed core 8 at a position spaced apart from the first flange portion 9 along the axis of 8 and faces the first flange portion 9, and the first and second flange portions 9 and 9. , 10 are connected to each other at outer peripheries, and are made of a magnetic metal in a cylindrical shape, and an end plate 12 made of a synthetic resin in a disk shape and abutting and fixed to one end of the yoke 7 in the axial direction. .

The yoke 7 and the fixed core 8 are fitted to both ends of a cylindrical connecting cylinder 13 made of a non-magnetic material such as stainless steel, and the outer surface of the connecting cylinder 13 is the outer surface of the fixed core 8. To be flush with each other. Further, the fixed core 8 has a first guide hole 14 having the same inner diameter as the inner surface of the yoke 7, and a first guide hole 14 having a smaller diameter than the first guide hole 14 and a step portion 15 interposed therebetween.
A second guide hole 16 coaxially connected to the guide hole 14 is provided coaxially. Thus, the plunger 5 formed of a magnetic metal in a short cylindrical shape is slidably fitted to the yoke 7 so that it can fit into the first guide hole 14, and the plunger 5 is attached to the other end of the yoke 7. The bush 18 that guides the axial movement of the is pressed in. In addition, the outer peripheral portion of the end portion of the plunger 5 on the step portion 15 side is provided with a tapered surface 5a having a smaller diameter toward the step portion 15 side.

The shaft 6 includes a small diameter portion 6a and the small diameter portion 6a.
It has a large diameter portion 6b coaxially connected to a via a step portion 6c and is made of a non-magnetic material. The small diameter portion 6a is press-fitted into the plunger 5. Moreover, in order to prevent the plunger 5 from directly contacting the step 15, the step 6
A disk-shaped cushioning member 17 made of a non-magnetic material is sandwiched between c and the plunger 5. The large-diameter portion 6b of the shaft 6 is coaxially inserted into the second guide hole 16, and a bush 19 for guiding the axial movement of the shaft 6 is provided at one end of the second guide hole 16 in the axial direction. Pressed in.

A thin cylindrical portion 11a having a large inner surface is provided at one end of a cylindrical cover 11 through a step portion 11b facing the one end side, and the second flange portion 1 is provided at the other end of the cover 11.
0s are continuously connected. On the other hand, on the outer surface of the fixed core 8 on the other end side, a small diameter portion 8a is provided via a locking step portion 8b facing the other end side, and the second flange portion 10 is locked to the locking step portion 8b. By press-fitting the small diameter portion 8a into the second collar portion 10, the second collar portion 10 is connected to the fixed core 8. Further, in the thin-walled cylindrical portion 11a of the cover 11, a first collar portion 9 and an end plate 12 that abuts an outer surface of the first collar portion 9 and closes one end of the yoke 7 are overlapped with each other and fitted. , End plate 1
By caulking the tip of the thin-walled cylindrical portion 11a to the outer edge of 2, the end plate 12 comes into contact with and is fixed to the first flange portion 9.

A coil 4 wound around a bobbin 20 made of a synthetic resin is provided between the first flange portion 9 and the second flange portion 10.
Is interposed so as to surround the yoke 7, the connecting cylinder 13 and the fixed core 8, and the coil 4 is further surrounded by the cover 11.

The bobbin 20 is provided with a pair of protrusions 23 penetrating through a pair of through holes 22 provided in the first collar portion 9 so as to be located on one diameter line of the bobbin 20, Both ends 4a and 4b of the coil 4 are provided with the protrusions 23
Is pulled out to the outside.

With reference to FIG. 3 and FIG. 4 together, the end plate 1
2 is embedded with a pair of terminal assemblies 25, 25 made of a conductive metal for connecting the ends 4a, 4b of the coil 4 and the external lead wires 24a, 24b. The two terminal assemblies 25, 25 are arranged point-symmetrically with respect to the center of the end plate 12, and the end portions 4a,
4b has an insertion hole 26 through which 4b can be inserted and pulled out to the outside, and the end portion 4a of the coil 4 is provided on the outer surface side of the end plate 12.
4b and a second terminal 28 connected to the external lead wires 24a, 24b on the outer surface side of the end plate 12 are connected via a fan-shaped connecting plate 29. is there.

Referring also to FIG. 5, the first terminal 27 is
Circular mounting hole 3 provided on one side in the circumferential direction of the connecting plate 29
0 is press-fitted in and fixed to 0, and a cylindrical press-fitting portion 27a press-fitted in the mounting hole 30 and an inner end of the press-fitting portion 27a are projected radially outward so as to be locked to the inner surface of the connecting plate 29. The locking brim portion 27b and the taper portion 27 connected to the outer end of the press-fitting portion 27a so as to have a smaller diameter toward the outer side in the axial direction.
c and a pair of half-split cylindrical portions 27d, 27d that are continuous with the outer end of the tapered portion 27c. Between the locking flange portion 27b of the first terminal 27 and the taper portion 27c, a concave portion 31 for fitting the tip end portion of the protruding portion 23 protruding from the first flange portion 9 and a protruding portion from the protruding portion 23. The insertion hole 26 through which the end portions 4a and 4b of the coil 4 are inserted is provided coaxially, and the two half-split cylindrical portions 27d and 27d surround the axial extension line of the insertion hole 26 from both sides to form the taper portion 2
It is connected to 7c.

The second terminal 28 is press-fitted and fixed in an elliptical mounting hole 32 provided on the other side in the circumferential direction of the connecting plate 29, and has an elliptical cross section so as to be press-fitted into the mounting hole 32. The formed press-fitting portion 28a, a pair of locking flanges 28b, 28b that laterally extend from both ends in the longitudinal direction of the press-fitting portion 28a so as to be locked to the inner surface of the connecting plate 29, and the center of the other end surface of the press-fitting portion 28a. And a screw shaft portion 28c that is integrally connected to the portion.

The terminal assembly 25 is mounted on the end plate 12 by exposing the outer surface of the connecting plate 29 around the first terminal 27 and the outer surface of the connecting plate 29 around the second terminal 28 to the outer surface of the end plate 12. The end plate 12 is provided with a hole 33 connecting the through hole 22 and the recess 31 at a portion corresponding to the first terminal 27. On the outer surface of the end plate 12, a wall 34 that surrounds the halves of the first terminal 27 and surrounds the half-cylindrical portions 27d, 27d is projected, and a part of the outer side of the housing 2 is opened to form a second wall. A wall 35 is provided so as to surround the screw shaft portion 28c of the terminal 28.

Both halved cylindrical portions 27 of the first terminal 27
end portions 4a, 4b of the coil 4 inserted between d and 27d
Is connected to the first terminal 27 by electric resistance welding that is performed so as to sandwich both the half-cylindrical portions 27d, 27d. The terminal plate 36 fixed to the ends of the external lead wires 24a and 24b is inserted into the wall 35, and the screw shaft portion 28c is inserted into the terminal plate 36. By tightening the nut 37 screwed to the screw shaft portion 28c, the terminal plate 36 is sandwiched between the connecting plate 29 and the nut 37, and the external lead wire 2
4a and 24b are connected to the second terminal 28.

Further, the end plate 12 is provided with an opening hole 38 (see FIG. 3) for preventing the space between the plunger 5 and the end plate 12 from being increased or decreased by the movement of the plunger 5.

Next, the operation of this embodiment will be described. When the coil 4 is excited, as shown by the arrows in FIGS. 1 and 2, the fixed core 8, the second flange 10, and the cover are provided around the coil 4. 11, first collar 9, yoke 7
And through the plunger 5, the tapered surface 5 of the plunger 5
Lines of magnetic force from a to the fixed core 8 are generated, and the plunger 5 moves toward the fixed core 8 side by a stroke corresponding to the amount of exciting electricity as shown in FIG. As a result, the member to be actuated is pushed by the shaft 6 and the coil 4
When is demagnetized, the plunger 5 returns to the position separated from the fixed core 8.

When assembling the linear solenoid LS, as shown in FIG. 6, the end plate 12 in which the pair of terminal assemblies 25 are embedded is prepared in advance, and the yoke 7, the fixed core 8 and the first Collar portion 9, second collar portion 10, cover 11, bobbin 2
The coil 4 wound around 0 is temporarily assembled. So the first
The end plate 12 is brought into contact with the outer surface of the first collar portion 9 so that the pair of protrusions 23 protruding from the collar portion 9 are fitted into the holes 33, respectively, and the thin-walled cylindrical portion 11a at one end of the cover 11 is terminated. The plate 12 is caulked and joined. Then, the end 4 of the coil 4
a and 4b are to be inserted between the two halved cylindrical portions 27d and 27d of the first terminal 27 of the two terminal assemblies 25, and the two halved cylindrical portions 27d and 27d have the end portions 4a and 4d.
By performing electric resistance welding so as to sandwich b, the ends 4a and 4b are respectively connected to the first terminals 27 of both terminal assemblies 25. Next, the external lead wires 24a and 24b may be connected to the second terminal 28 with the nuts 38, respectively.

In such a linear solenoid LS, the bobbin 20 may have a relatively simple structure having only a pair of protrusions 23 for pulling out the ends 4a and 4b of the coil 4, and the end of the coil 4 may be formed. The parts 4a and 4b are end plates 1
The outer surfaces of the two are respectively connected to the first terminals 27, which facilitates the connection work and also facilitates the management after assembling because the connection portion is visible from the outside.

Since the external lead wires 24a and 24b are connected to the second terminal 28 by screwing and tightening the nut 37 onto the screw shaft portion 28c, the connection strength can be increased and the reliability can be improved. .

[0025]

As described above, according to the present invention, the bobbin is provided with a pair of protrusions that project the ends of the coils and penetrate one of the two flanges. An end plate made of synthetic resin is abutted and fixed to the outer surface,
The end plate has an insertion hole through which the end of the coil can be inserted and pulled out to the outside, and a first terminal connectable to the end of the coil on the outer surface side of the end plate, and an outer surface of the end plate. Since the pair of conductive metal terminal assemblies formed by connecting the second terminals connected to the external lead wires on the side are embedded, the coil and the external lead wires can be easily connected by simplifying the structure of the bobbin. In addition, the connection portion of the coil and the terminal assembly can be visually recognized from the outside, and the management of the connection portion can be facilitated.

[Brief description of drawings]

1 is a vertical cross-sectional view of a linear solenoid to which the present invention is applied during operation, which is a cross-sectional view taken along line 1-1 of FIG.

FIG. 2 is a vertical cross-sectional view corresponding to FIG. 1 when not in operation.

FIG. 3 is a plan view taken along arrow 3 of FIG.

FIG. 4 is a perspective view of the terminal assembly showing the end plate in a see-through state.

FIG. 5 is an exploded perspective view of a terminal assembly.

FIG. 6 is an exploded vertical sectional view of the linear solenoid showing a state during assembly.

[Explanation of symbols]

 4 Coil 4a, 4b Coil end 5 Plunger 7 Yoke 8 Fixed core 9,10 Collar 12 End plate 20 Bobbin 23 Projection 25 Terminal assembly 26 Insertion hole 27 First terminal 28 Second terminal LS As an electromagnetic actuator Linear solenoid

Claims (1)

[Scope of utility model registration request] 1. A yoke (7) and a fixed core (8) arranged at a distance from each other along a moving direction of a plunger (5), and a yoke (7) and a fixed core (8) facing each other. ) Surrounding the collar portions (9, 10), the yoke (7) and the fixed core (8), and the bobbin (20) between the collar portions (9, 10). In the electromagnetic actuator including the coil (4), the bobbin (20) has the ends (4a, 4b) of the coil (4) protruding from the bobbin (20) and one (9) of the flanges (9, 10). A pair of protrusions (23) penetrating through the end plate (1) made of synthetic resin on the outer surface of the one flange (9).
2) is abutted and fixed, and the end plate (12) has an insertion hole (26) through which the ends (4a, 4b) of the coil (4) can be inserted and drawn out to the outside. A first terminal (27) that can be connected to the ends (4a, 4b) of the coil (4) on the outer surface side of 12) and external lead wires (24a, 24b) on the outer surface side of the end plate (12). An electromagnetic actuating device, wherein a pair of conductive metal terminal assemblies (25), which are connected to a second terminal (28) connected to, are embedded.