CN220118758U - Solenoid valve with low friction valve core - Google Patents

Abstract

The utility model discloses a solenoid valve with a low-friction valve core, which comprises a shell, wherein a valve body assembly and an electromagnet assembly are arranged in the shell, the valve body assembly comprises a valve seat fixedly connected in the shell and a valve core movably connected at the rear end of the valve seat, the rear end of the valve seat is provided with a guide section along the axial direction, the front section of the valve core is movably connected on the guide section and axially reciprocates along the guide section, a magnetic conduction ring is fixedly arranged in the shell, the magnetic conduction ring is positioned at the outer side of the rear section of the valve core, a gap is arranged between the magnetic conduction ring and the valve core, the electromagnet assembly comprises a push rod, and the front end of the push rod penetrates through the magnetic conduction ring and is connected with the valve core. Through the mode, the electromagnetic valve with the low-friction valve core reduces the machining precision requirement of the valve core and reduces the abrasion of the valve core in the reciprocating movement process by changing the assembly structure of the valve core, so that the service life of the valve core is prolonged, and the electromagnetic valve with the low-friction valve core is ensured to meet the use requirement.

Description

Solenoid valve with low friction valve core

Technical Field

The utility model relates to the field of solenoid valves with low-friction valve cores, in particular to a solenoid valve with a low-friction valve core.

Background

The electromagnetic valve having a low friction valve element is an industrial device controlled by electromagnetic, is an automatic base element for controlling fluid, and is an actuator, not limited to hydraulic and pneumatic, but a shock absorber having an electromagnetic valve having a low friction valve element capable of changing a damping force is used in a shock absorber used for a suspension of a vehicle.

Patent CN202222878346.4 discloses a solenoid valve with low friction valve core for reducing magnetic core friction, when the electromagnetic core component is driven by the electromagnet component to move, the guide rod is driven to move together, the guide rod guides the movement of the electromagnetic core component, so that the electromagnetic core component is not contacted with the outer valve body component, friction blocking and abrasion caused by contact sliding of the electromagnetic core component and the outer valve body component are avoided, friction force with larger area is transferred to friction with two parts of the guide rod, the guide sleeve and the valve seat with smaller area, and friction force of movement of the electromagnetic core component is greatly reduced.

However, the inner hole at the front end of the valve core assembly in the patent needs to be matched with the valve seat, and the outer circle at the rear end of the valve core assembly needs to be matched with the electromagnetic core assembly, so that the requirement on the dimensional accuracy of the valve core assembly is very high. And the valve core assembly can be influenced by larger friction force in the reciprocating motion process, the stress at the two ends of the valve core is uneven, and under the condition that the dimensional accuracy can not meet the requirement, the valve core assembly can deform or break due to the abrasion problem, the service life is very low, and the requirement can not be met.

Disclosure of Invention

The utility model mainly solves the technical problem of providing the electromagnetic valve with the low-friction valve core, and the assembly structure of the valve core is changed, so that the machining precision requirement of the valve core is reduced, the abrasion of the valve core in the reciprocating movement process is reduced, the service life of the valve core is prolonged, and the electromagnetic valve with the low-friction valve core is ensured to meet the use requirement.

In order to solve the technical problems, the utility model adopts a technical scheme that: the utility model provides a solenoid valve with low friction case, including the casing, be equipped with valve body subassembly and electro-magnet subassembly in the casing, the valve body subassembly is including linking firmly the disk seat in the casing and swing joint at the case rear end, the rear end of disk seat has along axial direction section, the anterior segment swing joint of case is on the direction section and along direction section axial reciprocating motion, set firmly the magnetic conduction ring in the casing, the magnetic conduction ring is located the rear section outside of case to set up for the clearance between with the case, the electro-magnet subassembly includes the ejector pin, the front end of ejector pin passes the magnetic conduction ring and is connected with the case.

In a preferred embodiment of the present utility model, the valve seat includes an oil port a disposed along an axial direction and an oil port B disposed along a circumferential direction, and the valve core moves forward along the guide section, so that an inner side surface of the valve core is closely attached to an outer wall of the valve seat to close the oil port B.

In a preferred embodiment of the utility model, a balance rod is arranged on the inner side of the valve core, the front end of the balance rod extends into the valve seat, and a return spring is connected between the balance rod and the valve seat.

In a preferred embodiment of the present utility model, a balance oil port is formed in the magnetic conductive ring, and the balance oil port is communicated with a gap between the magnetic conductive ring and the valve core.

In a preferred embodiment of the utility model, a shaft sleeve which is movably matched with the ejector rod is arranged on the inner side of the magnetic conduction ring.

In a preferred embodiment of the utility model, the ejector rod is fixedly connected inside the electromagnet.

The beneficial effects of the utility model are as follows: the electromagnetic valve with the low-friction valve core provided by the utility model has the advantages that the front section of the valve core is matched with the guide section of the valve seat, the rear section of the valve core is arranged with the magnetic conduction ring in a clearance mode, and during machining, only the machining precision of the front end of the valve core is required, so that the front end and the rear end of the valve core are prevented from being subjected to friction force in the sliding process, uneven stress at the two ends of the valve core is avoided, and the service life of the valve core is effectively prolonged.

The electromagnetic valve with the low-friction valve core has the advantages that the ejector rod is movably matched with the magnetic conduction ring through the shaft sleeve, the ejector rod can conveniently move the valve core to advance, the valve core can automatically reset after being separated from the ejector rod through the reset spring, the valve core driving mode is simple, and the response speed is high.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic illustration of a solenoid valve with a low friction spool according to a preferred embodiment of the present utility model;

the components in the drawings are marked as follows: 1. the valve comprises a shell, 2, a push rod, 3, an electromagnet, 4, a valve seat, 41, a guide section, 5, a valve core, 6, a magnetic conduction ring, 61, a balance oil port, 7, a balance rod, 8 and a return spring.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below. The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the utility model, without affecting the effect or achievement of the objective. Also, the terms "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for modification or adjustment of the relative relationships thereof, as they are also considered within the scope of the utility model without substantial modification to the technical context.

Referring to fig. 1, a solenoid valve with a low friction valve core includes a housing 1, and a valve body assembly and an electromagnet assembly are disposed in the housing 1.

The electromagnet assembly comprises a push rod 2 and an electromagnet 3, and the push rod 2 is fixedly connected inside the electromagnet 3. The outside of the shell 1 is provided with a coil assembly, the coil assembly is electrified, the electromagnet 3 is pushed by magnetic force to drive the ejector rod 2 to move leftwards, and the structure and principle of the part are the prior art and are not repeated here.

The valve body assembly comprises a valve seat 4 fixedly connected in the shell 1 and a valve core 5 movably connected at the rear end of the valve seat 4. The valve seat 4 includes an oil port a provided in the axial direction and an oil port B provided in the circumferential direction.

A magnetic conduction ring 6 is fixedly arranged in the shell 1, and the magnetic conduction ring 6 is fixed with the shell 1. The magnetic conduction ring 6 is positioned at the outer side of the rear section of the valve core 5 and is arranged with the valve core 5 in a clearance way, so that the cooperation between the valve core 5 and the magnetic conduction ring 6 is changed, and the requirement on the dimensional processing precision of the rear end of the valve core 5 is reduced. The front end of the ejector rod 2 passes through the magnetic ring 6 to be connected with the valve core 5, the inner side of the magnetic ring 6 is provided with a shaft sleeve which is movably matched with the ejector rod 2, and the friction born by the ejector rod 2 is reduced through the shaft sleeve. So that the ejector rod 2 can smoothly push the valve core 5 to move.

The rear end of the valve seat 4 has an axial guide section 41, to which the front section of the valve element 5 is movably connected and axially reciprocates. When the ejector rod 2 moves leftwards, the ejector rod 2 can push the valve core 5 to move synchronously, so that the valve core 5 moves forwards along the guide section, when the valve core 5 moves to the limit position, the inner side surface of the valve core 5 is tightly attached to the outer wall of the valve seat 4 to seal the oil port B, at the moment, the oil port B is closed, oil in the oil port A cannot flow out of the valve body after passing through the oil port B, and the electromagnetic valve with the low-friction valve core is in a closed state. The valve core 5 is only matched with the guide section, so that axial movement is carried out on the basis of the guide section, the rear end is not contacted with the magnetic conduction ring 6, so that the processing precision of the front end of the valve core 5 is only required, the processing difficulty is reduced, the condition that the two ends of the valve core 5 are stressed in the moving process can be avoided, and the service life of the valve core 5 is effectively prolonged.

The inner side of the valve core 5 is provided with a balance rod 7, and the front end of the balance rod 7 stretches into the valve seat 4. A return spring 8 is connected between the balance rod 7 and the valve seat 4. When the electromagnet assembly is powered off, the ejector rod 2 moves rightwards to reset. Due to the restoring force of the restoring spring 8, the restoring spring 8 pushes the valve core 5 to move rightwards until the valve core 5 is separated from the oil port B, at the moment, the oil port A and the oil port B are communicated again, and the electromagnetic valve with the low-friction valve core is in an open state.

A balance oil port 61 is arranged in the magnetic conduction ring 6, and the balance oil port 61 is communicated with a gap between the magnetic conduction ring 6 and the valve core 5. The electromagnet 3 is also internally provided with a balance oil hole, and internal oil pressure balance is realized through the balance rod 7, the balance oil hole 61 and the balance oil hole, and the balance oil hole is of a conventional structure and is not repeated here.

Compared with the prior art, the electromagnetic valve with the low-friction valve core has the advantages that the machining precision requirement of the valve core is reduced and the abrasion of the valve core in the reciprocating movement process is reduced by changing the assembly structure of the valve core, so that the service life of the valve core is prolonged, and the electromagnetic valve with the low-friction valve core is ensured to meet the use requirement.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (6)

1. The utility model provides a solenoid valve with low friction case, includes the casing, is equipped with valve body subassembly and electro-magnet subassembly in the casing, its characterized in that, the valve body subassembly is including the disk seat that links firmly in the casing and the case of swing joint at the disk seat rear end, the rear end of disk seat has along axial direction guidance segment, the anterior segment swing joint of case is on the guidance segment and along guidance segment axial reciprocating motion, set firmly the magnetic ring in the casing, the magnetic ring is located the rear segment outside of case to be the clearance setting between with the case, the electro-magnet subassembly includes the ejector pin, the front end of ejector pin passes the magnetic ring and is connected with the case.

2. The solenoid valve with a low friction valve spool of claim 1 wherein the valve seat includes an axially disposed port a and a circumferentially disposed port B, the spool advancing along the pilot segment such that an inner side of the spool abuts an outer wall of the valve seat to close the port B.

3. The solenoid valve with a low friction valve spool according to claim 2, wherein a balance bar is provided on the inner side of the valve spool, the front end of the balance bar extends into the valve seat, and a return spring is connected between the balance bar and the valve seat.

4. The solenoid valve with a low friction spool as described in claim 1 wherein a balancing port is provided in the magnetically permeable ring, the balancing port being in communication with a gap between the magnetically permeable ring and the spool.

5. The solenoid valve with a low friction spool of claim 4 wherein the magnetically permeable ring is internally provided with a bushing that is in clearance fit with the carrier rod.

6. The solenoid valve with a low friction spool of claim 5 wherein the carrier rod is fixedly attached to the interior of the electromagnet.