WO2003021755A1

WO2003021755A1 - Solenoid valve driver

Info

Publication number: WO2003021755A1
Application number: PCT/JP2001/007571
Authority: WO
Inventors: Kazuhiko Fukushima; Yoshiaki Yamazaki; Akihiko Imagi; Masao Morita; Toshie Takeuchi; Masafumi Sugawara
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2001-08-31
Filing date: 2001-08-31
Publication date: 2003-03-13
Also published as: JPWO2003021755A1

Abstract

A solenoid valve driver in which a movable core and a movable core coupling shaft can be integrated by allowing them to intersect perpendicularly rigidly and accurately by an extremely simple arrangement by integrating them by thermal caulking.

Description

Description Electromagnetic valve drive Technical field

The present invention relates to, for example, an electromagnetic valve driving device for directly opening and closing an intake valve or an exhaust valve for an internal combustion engine. Background art

FIG. 1 is a longitudinal sectional view showing a conventional electromagnetic valve driving device. In the figure, reference numeral 101 denotes a cylindrical case, and 102 a and 102 b denote the inside of the cylindrical case 101. First and second outer cores attached to the inner wall surface of the cylindrical case 101 with an interval 103 provided in the middle, 104a and 104b are first and second outer cores 104 a— 1, 104 b—1 that covers the end face side of the first and second pillars inserted into the first and second outer cores 104 a—2, 104 b— The first and second central cores consisting of 2 and 105a and 105b are attached to the first and second central core pillars 104a-2 and 104b-2, respectively. The first and second coils, 106, are movable iron cores positioned within the opposing interval 103 between the first and second outer cores 102a, 102b, and 107 is the first core. Is a movable core connecting shaft passing through a through hole 108 provided in the center of the central iron core 104a, and a movable iron core 106 is attached to the tip of the movable core connecting shaft 107. It is attached by 1 0 9 or welding. Reference numeral 110 denotes a valve shaft whose upper end is in contact with the lower end of the movable iron core connecting shaft 107, and a valve 111 is attached to its lower end. 1 1 2 is a spring bearing fixed to the valve shaft 1 10, 1 1 3 is the first coil spring mounted on the valve shaft between the main body 1 1 4 and the spring bearing 1 1 2, 1 1 5 is movable Spring bearing fixed to the lower end of core connecting shaft 107, 1 16 is the first central iron core 104a The second coil spring is mounted on the movable iron core connecting shaft 107 between the lower surface of the spring and the spring receiver 115.

Next, the operation will be described.

When the first coil 105 a and the second coil 105 b are not energized, the movable iron core 100 is balanced by the balance of the spring force of the first coil spring 113 and the second coil spring 116. 6 is located at a predetermined position within the interval 103.

In this state, when the first coil 105a is energized to open the valve, the magnetic path formed by the movable core 106, the first outer core 102a, and the first central core 104a The movable iron core 106 moves to the first outer iron core 102 a side due to the electromagnetic force generated by the magnetic field due to the magnetic flux passing through and the spring force of the second coil spring 116, whereby The movable iron core connecting shaft 107 and the valve shaft 110 move downward against the first coil spring 113 to open the valve. At this time, the opening amount of the valve 111 is determined by the amount of electricity to the first coil 105a.

Next, in order to close the valve 1 1 1, when the energization of the first coil 105 a is turned off and the energization of the second coil 105 b is performed, the movable iron core 106 and the second outer iron core 102 b The movable core 106 is moved to the second outside by the electromagnetic force generated by the magnetic field generated by the magnetic flux passing through the magnetic path formed by the second central core 104 b and the spring force of the first coil spring 113. The core moves to the side of the core 102b, whereby the movable core connecting shaft 100 and the valve shaft 110 move upward against the second coil spring 116 to close the valve 111. .

The conventional electromagnetic valve driving device is configured as described above, and the movable core is attached to the end of the movable core connecting shaft by screwing or welding. For this reason, it was difficult to firmly integrate the movable core and the movable core connecting shaft, and it was also difficult to fix the movable core perpendicular to the movable core connecting shaft. The present invention has been made to solve the above problems, and has as its object to integrate a movable core and a movable core connecting shaft firmly and accurately at right angles with a simple and inexpensive configuration. Disclosure of the invention

An electromagnetic valve driving device according to the present invention is one in which a movable iron core and a movable iron core connecting shaft are integrated by thermal shrinkage.

Thereby, the movable core and the movable core connecting shaft can be integrated firmly and accurately at right angles to each other.

An electromagnetic valve driving device according to the present invention is characterized in that a protruding boss having a hole communicating with a movable core connecting shaft provided in a movable core is formed on one or both surfaces of the movable iron core. The movable core connecting shaft is integrated with the movable core by heat caulking.

As a result, the engagement length between the movable core and the movable core connecting shaft becomes longer, and the movable core and the movable iron connecting shaft can be integrated more firmly and more accurately at right angles to each other.

An electromagnetic valve driving device according to the present invention is characterized in that a protruding boss having a bottomed hole communicating with a movable core connecting shaft and a through hole provided on a movable iron core is provided on one or both surfaces of the movable core. The movable core connecting shaft inserted into the movable core is integrated with the movable core by thermal caulking, and a screw is provided for screwing the thermally caulked movable core connecting shaft to the movable core.

Thus, the movable iron core and the movable iron core connecting shaft can be integrated more firmly and accurately at right angles. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a longitudinal sectional view showing a conventional electromagnetic valve driving device. FIG. 2 is a longitudinal sectional view showing an electromagnetic valve driving device according to Embodiment 1 of the present invention.

FIG. 3 is a longitudinal sectional view showing an electromagnetic valve driving device according to Embodiment 2 of the present invention.

FIG. 4 is a longitudinal sectional view showing an electromagnetic valve driving device according to Embodiment 3 of the present invention.

FIG. 5 is a longitudinal sectional view showing an electromagnetic valve driving device according to Embodiment 4 of the present invention.

FIG. 6 is a longitudinal sectional view showing an electromagnetic valve driving device according to Embodiment 5 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, in order to explain this invention in greater detail, the preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1

FIG. 2 is a longitudinal sectional view showing an electromagnetic valve driving device according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a cylindrical case, and 2a and 2b denote intermediate portions in a cylindrical case 1. The first and second outer cores 4a and 4b attached to the cylindrical case at intervals 3 are substrate portions 4a-1 and 4b- which cover the end surfaces of the first and second outer cores. The first and second central cores 5a and 5b are composed of the first and second pillar cores 4a-2 and 4b-2 inserted into the first and second outer cores, respectively. The first and second coils attached to the pillars of the central core of 6 are the movable cores located within the opposing distance 3 between the first and second outer cores, 7 is the first central core 4a It is a movable core connection shaft that passes through a through hole 8 provided in the center. Numeral 10 denotes a valve shaft whose upper end is in contact with the lower end of the movable iron core connecting shaft 7, and a valve 11 is attached to its lower end. 1 2 is a spring bearing fixed to the valve shaft 10, 13 is a first coil spring mounted on the valve shaft between the device body 14 and the spring bearing 12, 15 is a movable coil connecting shaft 7 A spring receiver 16 fixed to the lower end is a second coil spring mounted on the movable core connecting shaft 7 between the lower surface of the first central iron core 4 a and the spring receiver 15.

In the present invention, the movable iron core 6 is integrated with the movable iron core connecting shaft 7 by thermal caulking 9. The heat caulking 9 is based on one of the following.

(1) The movable core (magnetic material) 6 is heated to increase the hole diameter, and the end of the movable core connecting shaft (non-magnetic material) 7 is inserted into the hole 6a to be crimped at room temperature. .

(2) Cool the movable core connecting shaft (non-magnetic material) 7, reduce the shaft diameter and insert it into the movable core connecting shaft 揷 through hole 6a of the movable iron core 6 to be crimped at room temperature.

(3) The movable core 6 is heated to increase the hole diameter, the movable core connecting shaft 7 is cooled to reduce the shaft diameter, and the end of the movable core connecting shaft Ί is connected to the movable core connecting shaft of the movable core 6. Insert into hole 6a and crimp at room temperature.

Next, the operation will be described.

When the first coil 5a and the second coil 5b are not energized, the movable iron core 6 is within a predetermined distance 3 by the balance of the spring force of the first coil spring 13 and the second coil spring 16. Position.

In this state, when the first coil 5a is energized to open the valve, the electromagnetic force generated by the magnetic field due to the magnetic flux passing through the magnetic path by the movable iron core 6, the first outer iron core 2a, and the first central iron core 4a The movable iron core 6 moves to the first outer iron core 2 a side by the spring force of the second coil spring 16 and the second coil spring 16, whereby the movable iron connecting shaft 7 and the valve shaft 10 resist the first coil spring 13. do it Move down and open valve 1 1. At this time, the opening amount of the valve 11 is determined by the amount of electricity to the first coil 5a.

Next, in order to close the valve 11, when power is supplied to the second coil 5 b after power supply to the first coil 5 a is turned off, the movable iron core 6, the second outer iron core 2 b, and the second central iron core 4 b The movable core 6 is moved to the second outer core 2 b by the electromagnetic force generated by the magnetic field generated by the magnetic flux passing through the magnetic path of the first coil spring 13, whereby the movable core connecting shaft 7 and The valve shaft 10 moves upward against the second coil spring 16 to close the valve 11.

As described above, according to the first embodiment, since the movable core and the movable core connecting shaft are assembled by thermal force crimping, the movable core and the movable core connecting shaft are firmly and precisely connected with a simple and inexpensive configuration. They can be well orthogonalized and integrated. Embodiment 2

FIG. 3 is a longitudinal sectional view showing an electromagnetic valve driving apparatus according to Embodiment 2 of the present invention. Since the entire structure is the same as that of Embodiment 1, the same parts are denoted by the same reference numerals and are duplicated. Description is omitted.

In the second embodiment, a projecting boss 20 is provided on the mounting surface side of the movable core 6 with the movable core connecting shaft Ί, and the boss 20 communicates with the movable core connecting shaft 揷 through hole 6 a of the movable core 6. The hole 20a is formed.

With this configuration, even if the thickness of the movable core 6 is thin, a sufficient assembly length with the movable core connecting shaft 7 can be ensured, and any one of the positions (1) to (3) described above can be secured. The movable core 6 and the movable core connecting shaft 7 can be firmly and accurately orthogonally integrated by heat caulking. Embodiment 3.

FIG. 4 is a longitudinal sectional view showing an electromagnetic valve driving device according to Embodiment 3 of the present invention. Since the entire configuration is the same as that of Embodiment 1, the same portions are denoted by the same reference numerals and are duplicated. Description is omitted.

In the third embodiment, projecting bosses 30 are provided on both sides of the center of the movable core 6, and a hole 30 a communicating with the movable core connecting shaft of the movable core 6 and the through hole 6 a is formed in the boss 30. Things.

With this configuration, even when the thickness of the movable core 6 is thin, a sufficient assembly length with the movable core connecting shaft 7 can be ensured, and any one of the positions (1) to (3) described above can be secured. By heat caulking, the movable core and the movable core connecting shaft can be firmly and accurately orthogonally integrated. Embodiment 4.

FIG. 5 is a longitudinal sectional view showing an electromagnetic valve driving apparatus according to Embodiment 4 of the present invention. Since the entire structure is the same as that of Embodiment 1, the same parts are denoted by the same reference numerals and are duplicated. Description is omitted.

In the fourth embodiment, a projecting boss 40 is provided on the mounting surface side of the movable core 6 with the movable core connecting shaft 7, and a hole 40 a that does not penetrate the movable core 6 is formed in the boss 40. The movable core connecting shaft 7 is assembled and fixed to any one of the positions (1) to (3) described above at 40a by heat caulking, and the end face is mechanically fixed to the movable iron core 6 with screws 41. With this configuration, even when the thickness of the movable core 6 is thin, it is possible to secure a sufficient assembly length with the movable core connecting shaft 7, and the movable core 6 and the movable core connecting shaft can be secured. 7 can be integrated more firmly and more accurately orthogonally by using heat caulking and screw connection together. Embodiment 5

FIG. 6 is a longitudinal sectional view showing an electromagnetic valve driving device according to a fifth embodiment of the present invention. Since the entire configuration is the same as that of the first embodiment, the same parts are denoted by the same reference numerals and are duplicated. Description is omitted.

In the fifth embodiment, projecting bosses 50 are provided on both sides of the center of the movable core 6, and the boss 50 communicates with the movable core connecting shaft 揷 through hole 6 a of the movable core 6 and does not penetrate the boss end face. A hole 50a is formed, and the movable core connecting shaft 7 is assembled and fixed to the hole 50a by any one of the above-described positions (1) to (3), and the end face thereof is fixed to the movable core 6. It is mechanically connected to a screw 41.

With this configuration, even when the thickness of the movable core 6 is thin, a sufficient assembly length with the movable core connecting shaft 7 can be ensured, and the movable core 6 and the movable core connecting shaft 7 can be thermally caulked and screwed. The combined use of the joints makes it possible to integrate the members more orthogonally and more accurately. Industrial applicability

As described above, the electromagnetic valve driving device according to the present invention is suitable for stabilizing the operation of driving a valve with a magnetic attraction force and a spring force.

Claims

The scope of the claims

1. A magnetic core for forming a magnetic path, and a movable iron core forming a part of the magnetic core for forming a magnetic path.

A coil that generates a magnetic flux by energization; a movable core connecting shaft that is attached to an end of the movable iron core and that is driven by receiving an electromagnetic force and a spring force; An electromagnetic valve driving device comprising a valve shaft that is in contact with the electromagnetic valve driving device, wherein the movable iron core and the movable iron connecting shaft are integrated by thermal force shrinking.

2. A movable core connecting shaft provided in the movable core. A protruding boss having a hole communicating with the through-hole is provided on one or both surfaces of the movable core, and the movable core connecting shaft passed through the boss hole is connected to the movable core. 2. The electromagnetic valve driving device according to claim 1, wherein the electromagnetic valve driving device is integrated with a thermo-shear.

3. A protruding boss having a bottomed hole communicating with the through hole of the movable core connecting shaft provided on the movable core is provided on one or both sides of the movable core. 2. The electromagnetic valve driving device according to claim 1, further comprising: a screw that is integrated with the movable iron core by thermal force crimping, and further includes a screw that screw-connects the thermally caulked movable core connecting shaft to the movable iron core.