TWI834444B - Proportional electromagnet device - Google Patents

Abstract

The invention provides a proportional electromagnet device, which is a proportional electromagnet device used for a proportional pressure control valve. The device structure includes a bushing group, an iron core and a coil group. The bushing group includes a A bushing, a magnetic isolation ring, a base and a stopper. The coil assembly includes a shell, a bottom cover and a top cover. A bushing is provided in the shell and moves within the bushing. An iron core is provided, one end of the bushing is connected to a magnetic isolating ring, and one end of the magnetic isolating ring opposite to the bushing is connected to a base. Both ends of the magnetic isolating ring are respectively connected to the base and the bushing. A three-claw groove structure is formed in the inner hole of the magnetic isolation ring, and the groove structure improves the stability of the movement of the iron core in the bushing.

Description

Proportional electromagnet device

The present invention relates to a proportional electromagnet device, and more specifically, to a proportional electromagnet device for a proportional pressure control valve.

Solenoid valves are essential valve control components in general hydraulic systems. Solenoid valves are further derived from proportional solenoid valves, which can more accurately and continuously adjust hydraulic conditions such as pressure or flow. For example, the electro-hydraulic anti-lock braking circuit used in vehicles is composed of proportional valves. (Proportional pressure control valve) independently and accurately adjusts the optimal braking force for each wheel.

Proportional solenoid valves rely on proportional electromagnets to achieve the function of proportionally adjusting the valve opening. The principle of proportional electromagnets is the same. The magnetic circuit is divided into two by the magnetic isolation ring in the magnetic sleeve and the flange of the base. , the magnetic permeability of the material is based on air. The magnetic permeability of metal magnetic materials exceeds 400. The magnetic permeability of non-magnetic materials such as copper alloy is about 0.9997, which is similar to air. Therefore, whether the copper ring is placed between two magnetic parts In the middle, or if the magnetic conductive parts are kept at the same distance, the magnetic field can be forced into the iron core to achieve the magnetic isolation effect; a certain gap must be maintained between the iron core and the magnetic conductive sleeve and be centered, so that when the proportional action area moves, the two magnetic The paths increase and decrease with each other to achieve an approximately constant electromagnetic force. The electromagnetic force is proportional to the size of the current (magnetomotive force) and has nothing to do with the position of the iron core. By balancing the electromagnetic force with pressure or spring force, continuous stepless adjustment is achieved. The purpose of core position.

Electromagnets have been used for many years. They convert magnetic energy into linear power. Because the displacement is controlled by magnetic energy, its accuracy is much higher than the previous movement and positioning effects produced by gears or screws. This is to improve The control effect of electromagnets, proportional electromagnets are based on the extension of electromagnet technology. The internal structure is divided into three parts: bushing, magnetic isolation ring and base. The bushing and base are magnetically conductive materials, and the isolation The magnetic ring is a non-magnetic material, and copper alloy is a non-magnetic material with characteristics similar to air, so the magnetic isolation ring can be a solid non-magnetic ring or directly left blank.

Please refer to Figure 1, which is a schematic diagram of a conventional proportional electromagnet. As shown in the figure, during the manufacturing process of the bushing 11, the magnetic isolation ring 12 and the base 13, in order to ensure that the structure can achieve concentricity and a fixed length, it is necessary to use The blank S or the clamp (not shown) are reserved for fixation. After the first process is completed, the base 13 and the bushing 11 need to be connected by welding. Since the blank S or the clamp is easy to cause lining during the welding process, The concentricity of the sleeve 11, the magnetic isolation ring 12 and the base 13 changes, or the solder flows in during welding, resulting in insufficient strength of the proportional electromagnet or poor sealing, which further causes the electromagnetic force of the proportional electromagnet to deteriorate.

Please refer to Figure 2, which is a schematic diagram of the cutting process of a conventional proportional electromagnet. As shown in the figure, after the welding process, the excess part of the blank S must be removed by cutting. In order to form the magnetic isolation ring 12 structure, during the processing process, if the concentricity of the bushing 11, the magnetic isolation ring 12 and the base 13 is insufficient, after the cutting process, it is easy to cause the bushing 11 or the base 13 to The size is affected, which in turn affects the electrical properties of the proportional electromagnet.

The above conventional technical shortcomings not only affect the reliability of hardware, but also cause The cost will also increase due to the complexity of the manufacturing process, which is not conducive to mass production and will also cause insufficient system performance in use.

In view of the shortcomings of the above-mentioned conventional technology, the main purpose of the present invention is to provide a proportional electromagnet device, which is a proportional electromagnet device for a proportional pressure control valve. The device structure includes a bushing group and an iron core. And a coil group, the bushing group includes a bushing, a magnetic isolation ring, a base and a stopper, the coil group includes a shell, a bottom cover and a top cover, the shell system consists of a A cylindrical shell composed of a body, a bottom cover and a top cover are respectively riveted at both ends of the shell. The top cover has a through opening corresponding to the axis of the cylindrical shell. In the through hole A bushing is provided, and an iron core is movable inside the bushing. One end of the bushing is connected to a magnetic isolation ring, and one end of the magnetic isolation ring opposite to the bushing is connected to a base. At the axial center position of the base, A stop block is provided. The proportional electromagnet device is characterized by: a connecting end is formed at both ends of the magnetic isolation ring, a connecting portion is formed at one end of the base and the bushing, and the connecting portion is connected to the connecting end through the connecting portion. A three-claw groove structure is formed in the inner hole of the magnetic isolation ring, and the groove structure improves the stability of the movement of the iron core in the bushing.

In one embodiment of the proportional electromagnet device of the present invention, the housing system is made of magnetically permeable metal material.

In one embodiment of the proportional electromagnet device of the present invention, the iron core is made of cylindrical magnetic conductive material.

In one embodiment of the proportional electromagnet device of the present invention, the connecting end It is a composite section formed by an outer cone and a right angle.

In one embodiment of the proportional electromagnet device of the present invention, the connecting portion is arranged in a shape relative to the connecting portion of the magnetic isolation ring.

In one embodiment of the proportional electromagnet device of the present invention, the groove structure is arranged in the form of a fan-shaped groove.

In one embodiment of the proportional electromagnet device of the present invention, the coil group further includes a wire hub and a coil.

In one embodiment of the proportional electromagnet device of the present invention, the coil is an enameled copper wire.

In one embodiment of the proportional electromagnet device of the present invention, the coil is wound around the wire hub.

To sum up, the present invention provides a proportional electromagnet device, which is connected to the connecting end through the connecting part, and a three-claw groove structure is formed in the inner hole of the magnetic isolation ring. Through the groove structure, the iron The stability of the movement of the core within the bushing.

11. 211: Bushing

12. 212: Magnetic isolation ring

13. 213: Base

S: Blank material

21: Bushing set

22:Iron core

23: Coil group

214: Stop block

231: Shell

232: Bottom cover

233:Top cover

234: Wire hub

235:Coil

D:Through opening

E:Connection end

F:Connection part

Figure 1 is a schematic diagram of a conventional proportional electromagnet;

Figure 2 is a schematic diagram of conventional proportional electromagnet cutting processing;

Figure 3 is a schematic diagram of the proportional electromagnet device of the present invention; and

Figure 4 is a schematic diagram of the bushing set of the proportional electromagnet of the present invention.

The following describes the embodiments of the present invention through specific examples. Those familiar with the art can understand other advantages and effects of the present invention from the content disclosed in this specification.

Please refer to Figure 3, which is a schematic diagram of the proportional electromagnet device of the present invention. As shown in the figure, it is a proportional electromagnet device for a proportional pressure control valve. The device structure includes a bushing group 21, an iron Core 22 and a coil group 23, wherein the coil group further has a hub 234 and a coil 235, and the coil 235 is an enameled copper wire and is wound around the wire hub 234. The bushing group 21 includes a bushing 211, A magnetic isolation ring 212, a base 213 and a stopper 214. The coil group 23 includes a shell 231, a bottom cover 232 and a top cover 233. The shell 231 is a cylinder composed of one piece. A bottom cover 232 and a top cover 233 are respectively riveted at both ends of the housing 231. The top cover 233 has a through opening D corresponding to the axis of the housing, and is provided in the through hole D. A bushing 211, and an iron core 22 made of cylindrical magnetic conductive material is movable inside the bushing 211. One end of the bushing 211 is connected to a magnetic isolation ring 212, and the magnetic isolation ring 212 is opposite to the bushing. One end of 211 is connected to a base 213, and a stop block 214 is provided at the axial center of the base 213. The shell system is made of magnetically permeable metal material.

For the characteristics of the proportional electromagnet device of the present invention, please refer to Figure 4, which is a schematic diagram of the bushing set of the proportional electromagnet of the present invention. As shown in the figure, an outer cone and a right-angle surface are formed at both ends of the magnetic isolation ring 212. The connecting end E of the composite cross-section is formed, and one end of the base 213 and the bushing 211 is formed with a connecting portion F in a shape relative to the connecting end E of the magnetic isolation ring (the two shapes can be combined and matched. ), connected to the connecting end E through the connecting part F, and a three-claw groove structure arranged in a fan-shaped groove is formed in the inner hole of the magnetic isolation ring 212, and the groove structure improves the iron core Stability of movement within the bushing.

To sum up, the present invention provides a proportional electromagnet device. The present invention changes the shape of the bushing part. The two end surfaces of the magnetic isolation ring in the middle section have a compound cross-section with an outer cone and a right angle, and the inner hole has a three-claw and fan-shaped concave section. Due to the composite shape of the groove, the corresponding end faces of the upper and lower bases and guide sleeves are also designed as male and female mating faces. According to the design of the present invention, each part of the bushing set can be processed to the final size at one time without the need to reserve blanks. When the bushing set is joined, the conical surface on the end face can automatically guide the centering, and the right-angled surface can accurately control the length and distance. , as long as the two ends are clamped with standard clamps such as vise, the combined bushing set can be welded. After the proportional electromagnet device of the present invention is assembled, the iron core relies on the three claws of the magnetic isolation ring to keep moving in the center. The fan-shaped groove between the claws can accept the passage of media such as fluid, ensuring the accuracy and accuracy of force feedback. Immediacy. The invention is used in proportional solenoid valves (proportional pressure control valves), which has the advantages of reducing manufacturing costs, being easy to produce in large quantities, and also improving reliability in use.

The above-mentioned embodiments are only illustrative to illustrate the characteristics and effects of the present invention, but are not intended to limit the scope of the essential technical content of the present invention. Anyone skilled in the art can make modifications and changes to the above embodiments without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be as listed in the patent application scope described below.

21: Bushing set

22:Iron core

23: Coil group

211: Bushing

212:Magnetic isolation ring

213:Pedestal

214: Stop block

231: Shell

232: Bottom cover

233:Top cover

234: Wire hub

235:Coil

D:Through opening

Claims (8)

A proportional electromagnet device. The device structure includes a bushing set, an iron core and a coil set. The bushing set includes a bushing, a magnetic isolation ring, a base and a stop block. The coil set It includes a shell, a bottom cover and a top cover. The shell system is composed of a cylindrical shell made of one piece. A bottom cover and a top cover are respectively riveted at both ends of the shell. The top cover has a Corresponding to the through opening of the axial center of the cylindrical shell, a bushing is provided in the through opening, and an iron core is movably provided in the bushing. One end of the bushing is connected to a magnetic isolation ring. One end of the ring relative to the bushing is connected to a base, and a stop block is provided at the axis of the base. The proportional electromagnet device is characterized in that: a connecting end is formed at both ends of the magnetic isolation ring, and the base and One end of the bushing is formed with a connecting portion. The connecting portion is a composite cross-section formed with an outer cone and a right angle. The connecting portion is connected to the connecting end, and a three-claw groove structure is formed in the inner hole of the magnetic isolation ring. , the groove structure improves the stability of the movement of the iron core in the bushing. As for the proportional electromagnet device described in item 1 of the patent application, the housing system is made of magnetically permeable metal material. For the proportional electromagnet device described in item 1 of the patent application, the iron core is made of cylindrical magnetic conductive material. For example, in the proportional electromagnet device described in item 1 of the patent application, the connecting portion between one end of the base and one end of the bushing is arranged in a shape relative to the connecting portion of the magnetic isolation ring. For the proportional electromagnet device described in item 1 of the patent application, the groove structure of the inner hole of the magnetic isolation ring is arranged in a fan-shaped groove manner. For the proportional electromagnet device described in item 1 of the patent application, the coil group further includes a wire hub and a coil. For the proportional electromagnet device described in item 7 of the patent application, the coil is an enameled copper wire. For example, in the proportional electromagnet device described in item 7 of the patent application, the coil is fully wound around the wire hub.

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