JPH04142005A - Electromagnetic coil - Google Patents

Abstract

PURPOSE:To easily, quickly, and surely make an electromagnetic coil to have slacks at end sections so as to eliminate the possibility of being cut from the end sections by forming guide grooves for coil ends into a flange to which a terminal block is extended in the thickness direction and, at the same time, removable pins so that the pin can face the grooves. CONSTITUTION:A terminal block 5 extended in the radial direction from part of a flange 2b at the upper end, two lower connecting members 7c and 8c which are provided on the lower surface of the block 5 in the lateral direction and has a conductivity, guide grooves 10a and 10b respectively composed of clearances formed by cutting into the flange 2b towards the members 7c and 8c from a hollow shaft 2a side on the left and right sides of the block 5 are provided. Then through holes 11a and 11b which are respectively formed in the vertical direction so that the holes 11a and 11b can face the grooves 10a and 10b and pins which can be inserted into the holes 11a and 11b in removable states are provided. The pins are inserted into the holes 11a and 11b when this coil is wound and removed after the coil is wound. Therefore, slacks can be formed at the end sections of the coil when the pins are removed and the possibility of being cut can be eliminated from the end sections.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in electromagnetic coils used in electromagnetic pumps for supplying liquid fuel such as kerosene.

[Conventional technology]

Conventionally, in an electromagnetic pump that discharges liquid fuel, an electromagnetic coil converts electromagnetic force into mechanical force, and the mechanical force is used to discharge liquid fuel. That is, this electromagnetic coil is repeatedly excited by intermittent current supplied in the form of pulse current from the power supply, and generates an electromagnetic force corresponding to the pulse width and pulse height for each pulse, which causes the plunger in the electromagnetic pump to move. It is driven back and forth. The liquid fuel is discharged during the forward movement of the plunger during reciprocation.

This electromagnetic coil is composed of a coil, a coil bobbin consisting of a hollow shaft around which the coil is wound, and flanges integrally formed on the upper and lower ends of the hollow shaft, and further connects the electromagnetic coil to a power source. In order to do this, a terminal block is provided that extends in the radial direction from a part of the collar at the upper end of the coil bobbin, and a connection terminal that connects to the power source side is provided from the top surface of the terminal block toward the front (radial direction).

In addition, in order to connect the terminal of the wound coil using the above connection terminal, the coil terminal is pulled out from the coil winding part below the terminal block through the terminal block to the base of the connection terminal on the top surface. was connected.

[Problem to be solved by the invention]

However, since the coil terminal is pulled out to the top of the terminal block and connected to the terminal, the connection is held in this bowed state, which increases the risk of the coil terminal breaking. There was a problem.

This invention has been made in view of the above, and has a connecting member on the lower surface of the terminal block, and both ends of the wound coil are fitted into a guide groove and a through hole drilled to face the guide groove. It is an object of the present invention to provide an electromagnetic coil which is guided to the above-mentioned connecting member through a pin, and which has an extra length at the end of the coil when the pin is removed.

[Means to solve the problem]

This invention relates to an electromagnetic coil consisting of a hollow shaft around which a coil is wound and a collar integrally formed at the upper and lower ends of the hollow shaft, in which a terminal is provided that extends in the radial direction from a part of the upper end collar. a base, two lower connecting members having conductivity arranged side by side in the left and right direction orthogonal to the radial direction on the lower surface of the terminal block, and a flange at the upper end at the left and right positions on the terminal block side. A guide groove formed of a gap cut out from the hollow shaft side toward the lower connecting member within the wall thickness of the flange, and a guide groove formed of a gap cut out from the hollow shaft side toward the lower connecting member, and a guide groove that penetrates in the vertical direction so as to face the guide groove from the upper surface of the flange at the upper end. The winding device is provided with a through-hole that is shaped like a coil, and a pin that can be inserted into and removed from the through-hole, and the pin is inserted into the through-hole during coil winding, and is removed from the through-hole after winding.

[Effect]

According to this invention, first, the pin is inserted into the through hole, and then the coil is passed from one side of the lower connecting member to the outside of the pin (
detour) along the guide groove to the hollow shaft. A coil is then wound around the hollow shaft. When winding of the coil is completed, the end of the coil is guided from the outside of the other pin (by detouring) along the other guide groove and connected to the other lower connecting member. Since the pin is freely insertable and removable, when the pin is subsequently removed from the through hole, an extra length corresponding to the detour described above is created at the coil end that had been stretched.

〔Example〕

FIG. 6 shows a sectional view of the entire electromagnetic pump to which the electromagnetic coil according to the present invention is applied.

In the figure, an electromagnetic pump 20 includes a cylinder 21,
A suction port 22 and a discharge port 23 are provided at both ends thereof. Further, inside the cylinder 21, a plunger 24 made of a cylindrical magnetic material and having a free piston shape is housed, and springs 25 and 26 are disposed in the front and rear to keep the plunger 24 elastically stationary. Inside the plunger 24 is a suction check valve 28 held down by a weak valve spring 27.
However, discharge check valves 30 held down by weak valve springs 29 are arranged in front of the plunger 24 in the forward movement direction.

Further, a separate cylindrical suction pipe 31 is connected to the cylinder 21, and the spring holder of the spring 26 is located at a portion 32 and the suction port 22 is located on the suction pipe 31 side. The filter 33 is also fixed with a ring 34. Note that the filter 33 can be used without using the ring 34.
It can also be attached to the circumferential surface of the suction port 22 by heat welding. Alternatively, the suction pipe 31 side may be continuously integrated with the cylinder 21 by a single pipe.

An electromagnetic coil 1 is provided on the outer periphery of the cylinder 21. This electromagnetic coil 1 consists of a hollow shaft 2a, a coil bobbin 2 having flanges 2b and 2c integrally formed at the upper and lower ends of the hollow shaft 2a, and a coil 3 wound around the hollow shaft 2a, and has a U-shaped cross section. It is fixed to the cylinder 21 by a yoke 4 which also serves as a shaped mounting board.

A terminal block 5 extends radially and slightly upward from a portion of the periphery of the collar 2b. This terminal block 5 is provided with a plurality of connection terminals so that two terminals of the coil 3, a discharge amount adjusting resistor, and two lead wires from a power source can be connected, as will be described later.

1 to 3 are diagrams showing one embodiment of the electromagnetic coil according to the present invention, in which FIG. 1 is a plan view, FIG. 2 is a front view, and FIG.
The figure is a side view.

In the figure, 21a is a hexagonal discharge side joint that is screwed into the outer peripheral part of the cylinder 21, 6 is a flat plate material screwed together by the yoke 4 and screws 6a, and the discharge side joint 21a is a flat plate material 6.
Since it is in a fitted state with the hexagonal hole 6b, the posture of the discharge side joint 21a relative to the yoke 4 is fixed, and the discharge side joint 21
This is done so that no rotational deviation occurs. Further, the lower end of the yoke 4 is bent left and right to extend, and fastening holes 4a and 4b for fastening to a combustor or the like in which the electromagnetic pump 20 is installed are bored at appropriate locations approximately in the center thereof. .

As described above, the terminal block 5 extends integrally from a portion of the peripheral edge of the collar 2b in the radial direction and slightly upward, and has a flat plate portion 5a having a horizontal surface at its end. By extending the terminal block 5 with a slight upward inclination, it is possible to prevent it from becoming an obstacle to the coil winding work.

Conductive long terminals 7 and 8 are located on the left and right positions of the flat plate portion 5a, and are located on the left side (for example) from the center of the flat plate portion 5a.
(See Figure 1.2) Conductive short terminals 9, which are shorter than the long terminals 7.8, are provided at appropriate locations so as to pass through the flat plate portion 5a in the vertical direction.

The long dimension terminal 7.8 has an upper connection part 7a (8a) which is valley-folded along a chain line, a lead wire connection part 7b (8b) extending forward, and a lead wire connection part 7b (8b) on both sides, as shown in the overall shape in FIG. The lower connecting portions 7 c, 7 c ” (8
c, 8 c”).

As shown in FIG. 2, this long dimension terminal 7 passes through the flat plate part 5a in the vertical direction, and has an upper connecting part 7a above it, a lead wire connecting part 7b to the left, and a penetrating part with the flat plate part 5a. The lower connecting portion 7C is located below the lower connecting portion. Similarly, the long dimension terminal 8 passes through the flat plate part 5a in the vertical direction, and has an upper connecting part 8a above it, a lead wire connecting part 8b to the right, and a lower part from the penetrating part with the flat plate part 5a. The lower connecting portion 8C is located there. Further, the short-dimension terminal 9 is composed only of an upper connecting portion 9a extending upward from the penetrating portion with the flat plate portion 5a and a lower connecting portion 9b9b'' (9b- is not shown) extending downward.

The lower connection parts 7c, 8c, and 9b are connected to the coil terminals of the wound coil 3, and other connections as necessary.
For example, an electrical member such as a diode for half-wave rectification is connected and fixed, and its negative side (the left side in FIG. 2) has an uneven shape to prevent it from coming off. Further, each of the lower connecting portions 7C, 8cm, and 9b'' is bent on the lower surface of the terminal block 5 to prevent the respective terminals from being pulled out.Long dimension terminals 7.
By configuring 8 as shown in FIG. 4, it can be used for both the left and right sides.

Furthermore, second. As shown in FIG. 3, guide grooves 10a and 10b are formed for the coil terminals, while first grooves 10a and 10b are formed near the left and right positions of the base 5b of the terminal block 5.
As shown in the figure, through holes 11a and llb are formed that reach the guide grooves 10a and 10b in the vertical direction.

FIG. 5 shows such guide grooves 10a, 10b and through hole 11.
FIG. 2 is a sectional view taken along the line V-V in FIG.

Note that the coil 3 is omitted.

In the figure, the collar 2b has a double structure with gaps within its wall thickness at the left and right positions on the front terminal block 5 side.

That is, these gaps constitute guide grooves 10a and 10b, and in FIG.
From the left side, the guide groove 10b has a groove bottom 100b indicated by a broken line.
They are formed on the right side. The groove bottom 100a of the guide groove 10a guides the starting point side of the coil end, and is formed from the circumferential surface of the hollow shaft 2a toward the lower connecting portion 7C. On the other hand, the groove bottom 100b of the guide groove 10b is for guiding the end point side of the coil end, and is formed from a position (corresponding to the diameter of the wound coil) somewhat away from the circumferential surface of the hollow shaft 2a toward the lower connecting part 9b. ing.

Further, the through hole 11a is bored so as to face the left side of the groove bottom 100a, that is, facing the guide groove 10a, and the side through hole 11b is bored so as to face the right side of the groove bottom 100b, that is, so as to face the guide groove 10b.

Although not shown in the figure, the through holes 11a, 11
The pin inserted into and removed from b has a cylindrical shape with a diameter that fits into the through hole, and may further include a grasping portion with a large diameter head. Further, the dimensions of the pin may be such that the lower end thereof contacts at least the lower surface of the guide groove when inserted into the through holes 11a and 11b. Further, the guide groove 10a,
Although the shape of 10b is a preferred embodiment in which the starting point and ending point of the coil end are distinguished, the guide groove may have a different shape from the above, or the left and right guide grooves may have the same shape.

Next, the coil winding operation will be explained. Before winding the coil onto the hollow shaft 2a, the through hole 11. A pin is inserted into the pins a and llb, and the end of the coil, for example, the starting point, is connected to the positive connection portion 7C, and the coil is guided from the outside of the pin to the hollow shaft 2a via the guide groove 10a and wound.

On the other hand, after winding, the end point of the coil terminal is guided from the outside of the pin to the normal connection part 9b via the guide groove 10b and connected.

After this work is completed, the pins are removed from the through holes 11a and 11b to give an extra length to the end portion of the coil stretched during winding, thereby preventing the coil from shearing. In this way, it is possible to easily provide an extra length at the end of the wound coil.

In addition, since the coil terminal is connected to the lower connection member below the terminal block, there is no need for a special guide structure to lead it to the top of the terminal block, and the lead wire can be short.
The risk of cutting is reduced.

Now, the base portion 5b of the terminal block 5 has a horizontal surface, and only the left and right ends thereof are formed in a slope shape, and tapered locking portions 12a and 12b are formed on the outer surface of the slope. The locking portions 12a and 12b are for ensuring secure attachment to a cover (not shown) used to prevent electrical leakage when the cover is attached.

The two lead wires for supplying drive signals obtained from the power supply in pulse form or by half-wave rectification of the commercial power supply have, for example, crimp terminals attached to their tips, and these terminals are connected to the lead wires. It is easily connected to the connecting portions 7b and 8b while canceling out the mounting forces from the left and right directions, respectively.

13 is a resistor for adjusting the discharge amount as described above, and is used for testing the discharge amount;
A resistor 13 selected from the measurement results is fixedly connected between the upper connecting portions 9a and 8a on the upper surface of the terminal block 5 by soldering or the like. Upper connection parts 7a, 8a.

A groove is cut out at the tip of 9a so that a resistor lead wire or the like can be easily engaged with it. In addition, the resistor 13 is connected to the terminal block 5 after the liquid fuel is actually sucked into the electromagnetic pump 20 from the suction pipe 31 to inspect the discharge amount and selected, so that it adheres to the suction pipe 31 during the connection work. In order to prevent the liquid fuel from dripping onto the terminal block 5 side, the connection point of the resistor 13 is set on the upper surface of the terminal block 5 so that it can be easily connected with the discharge port 23 facing upward.

Furthermore, this prevents the resistor from falling easily if it comes off during operation or if the solder melts due to abnormal heating.

Note that the vertical piece 5C formed on the upper surface of the flat plate portion 5a near the inner side of the upper connecting portion 8a functions as a support for connecting and arranging the resistor 13 at a central position between the upper connecting portion 9a and the upper connecting portion 8a. It is something.

〔Effect of the invention〕

As explained above, according to the present invention, a guide groove for the coil terminal is provided within the wall thickness of the collar on which the terminal block extends, and a pin that can be inserted and removed freely is provided facing the guide groove. Therefore, it is possible to easily, quickly and reliably provide an extra length to the coil terminal simply by inserting and removing the pin, and the risk of breakage is also eliminated.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the electromagnetic coil according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, and FIG.
The figure shows the overall configuration of the long dimension terminal, and Figure 5 shows the guide groove 10a.
, 10b and the through hole 11a. FIG. 2v shows the configuration of 11b with the coil 3 omitted.
6 is a sectional view of the entire electromagnetic pump to which the electromagnetic coil according to the present invention is applied. 1... Electromagnetic coil, 2... Coil bobbin, 2a...
・Hollow part, 2b, 2C...Tsuba, 3...Coil, 4・
... Yoke, 5 ... Terminal block, 5a ... Flat plate part, 5b
...Base, 7.8... Long dimension terminal, 9... Short dimension terminal, 7a, 8a, 9a... Upper connection part, 7b, 8b.
・Lead wire connection terminal, 7 c, 8 c, 9
b...Lower connection part, lQa, 10b-guide groove, 100
a, 100b--groove bottom, 11a. 1 l b--Through hole, 12a, 12b--Locking portion, 20--Electromagnetic pump, 21--Cylinder, 22-
...Suction port, 23...Discharge port, 24...Plunger, 25.26...Spring, 27...Valve spring, 28...
・Suction check valve, 29...Valve spring, 30...Discharge check valve, 31...Suction pipe, 32...Spring support part, 3
3...filter, 34...ring. Patent applicant: Silver Industries Co., Ltd. Figure 8c Figure 8c

Claims (1)

[Claims] 1. In an electromagnetic coil consisting of a hollow shaft around which a coil is wound, and a collar integrally formed on the upper and lower ends of the hollow shaft, a terminal block extending radially from a part of the upper end collar; Two conductive lower connecting members arranged side by side in the left and right direction perpendicular to the radial direction on the lower surface of the terminal block, and two conductive lower connecting members arranged side by side in the left and right direction perpendicular to the radial direction; A guide groove formed of a gap cut out in the wall thickness from the hollow shaft side toward the lower connecting member, and a through hole penetrated in the vertical direction from the top surface of the upper flange to the guide groove. and a pin that can be inserted into and removed from the through hole, the pin being inserted into the through hole during coil winding and removed from the through hole after winding.