CN211599685U - Expansion pin type coil fixing device - Google Patents

Abstract

The utility model discloses an expansion pin type coil fixing device, which comprises a coil and an electromagnetic valve, wherein the coil is sleeved on the electromagnetic valve; the electromagnetic valve further comprises a lock sleeve, a lock plate and a lock button, wherein the lock sleeve and the lock plate adopt elastic elements, the lock plate is arranged at the upper end of the coil, the lock sleeve is inserted into an upper rod end hole of the electromagnetic valve, and the lock button is inserted into the lock sleeve hole to the lower end position for locking the coil; the utility model aims at providing an expansion pin type coil fixing device, the coil fastening mode of the device is completely different from the current thread fastening mode, the adopted parts are all cartridge type, the solenoid valve rod core only bears slight axial pressure or tension, does not bear torque action, and has no distortion problem; the whole installation process of the electromagnetic valve and the coil always ensures the original flexible motion state of the magnetic iron core, and the potential fault hazard of the electromagnetic valve caused by improper coil installation is effectively avoided.

Description

Expansion pin type coil fixing device

Technical Field

The utility model belongs to the fixed field of solenoid valve coil, concretely relates to round pin formula coil fixing device expands.

Background

At present, all installation and fixing modes of all thread plug-in type solenoid valve coils all adopt a solenoid valve rod core end thread pair mode, namely, the solenoid valve rod core end is made into an external thread, and a nut is screwed after the coil is sleeved on the solenoid valve rod core end to be tightly fixed. This type of coil attachment places stringent requirements on the tightening torque of the attachment nut. The tightening nut is gradually loosened and falls off under the influence of working vibration of equipment or other external factors when the torque is small; the large torque can cause the solenoid valve rod core to be distorted and deformed to block the magnetic iron core in the rod core, so that the solenoid valve can not work normally. The solenoid valve rod core is actually a thin-walled tube and is easy to distort under the action of torque. In order to ensure that the electromagnetic force generated by the electromagnetic valve during working is large enough, the fit clearance between the magnetic iron core and the inner hole of the electromagnetic valve rod core is small, generally about 0.1mm, the iron core is required to move smoothly in the hole, and the friction resistance is extremely small. Once the electromagnetic valve rod core generates slight distortion, the magnetic iron core in the hole is easily clamped and stuck, and the hydraulic valve core sliding valve driven by the lower part of the iron core cannot work.

The installation of solenoid valve and the nut of coil are tight, all require to use the moment of torsion spanner. However, when equipment is maintained and debugged and electricians are wired, a common wrench (or a torque wrench is lacked on the site) is often used, so that the electromagnetic valve and a coil are often worried of loosening and are tightened by using an overlarge torque, and the fault hidden danger of the electromagnetic valve and even a hydraulic system is generated, and the phenomenon is very common and often occurs.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an expansion pin type coil fixing device, the coil fastening mode of the device is completely different from the current thread fastening mode, the adopted parts are all cartridge type, the solenoid valve rod core only bears slight axial pressure or tension, does not bear torque action, and has no distortion problem; the whole installation process of the electromagnetic valve and the coil always ensures the original flexible motion state of the magnetic iron core, and the potential fault hazard of the electromagnetic valve caused by improper coil installation is effectively avoided.

The utility model provides a technical scheme is: an expansion pin type coil fixing device comprises a coil and an electromagnetic valve, wherein the coil is sleeved on the electromagnetic valve;

the electromagnetic valve is characterized by further comprising a lock sleeve, a lock plate and a locking button, wherein the lock sleeve and the lock plate are elastic elements, the lock plate is installed at the upper end of the coil, the lock sleeve is inserted into an upper rod end hole of the electromagnetic valve, and the locking button is inserted into the lock sleeve hole and used for locking the coil to the lower end position.

As an improvement of the utility model, the lock sleeve is a cylindrical thin-wall pipe sleeve, and the lock sleeve is in a freely-retractable pipe state; the locking button is inserted into the lock sleeve and expands to enable the lock sleeve to expand and lock the lock sleeve in an upper rod end hole of the electromagnetic valve; the locking plate is of a disc-shaped structure, and when the locking button expands, pressure is applied to the locking plate along the axis direction of the central hole so as to compress and fix the coil.

As an improvement of the utility model, the lock sleeve and the locking plate are made of beryllium bronze, and the locking button is made of engineering plastics.

As an improvement of the present invention, an upper rod end hole of the electromagnetic valve is a stepped hole, and a lower side aperture of the upper rod end hole is larger than an upper side aperture of the upper rod port; the front end of the lock sleeve is matched with the end hole of the upper rod, a turned edge is arranged, and the rear end of the lock sleeve is matched with the lock plate and is also provided with a turned edge.

As an improvement of the utility model, the middle part of the lock sleeve is of a drum-shaped concave structure.

Has the advantages that:

the parts adopted by the utility model are all plug-in mounting type, the solenoid valve rod core only bears slight axial pressure or tension, does not bear the torque action, and has no distortion problem; the original flexible motion state of the magnetic iron core is always ensured in the whole installation process of the electromagnetic valve and the coil, and the potential fault hazard of the electromagnetic valve caused by improper installation of the coil is effectively avoided; the utility model discloses it is simple to dismantle the installation of solenoid valve coil, does not need such as torque wrench special instrument like this.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the present invention;

fig. 3 is a partial cross-sectional view of the present invention;

fig. 4 is a schematic structural view of the locking button of the present invention;

fig. 5 is a schematic view of the lock sleeve structure of the present invention.

In the figure: 1-electromagnetic valve, 2-coil, 3-lock sleeve, 4-locking plate. 5-locking the button.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

As shown in fig. 1 to 5, the expansion pin type coil fixing device in this embodiment includes a coil 2 and a solenoid valve 1, wherein the coil 2 is sleeved on the solenoid valve 1; still include lock sleeve 3, locking plate 4 and locking button 5, lock sleeve 3 with locking plate 4 adopts the elastic component, locking plate 4 is installed 2 upper ends of coil, lock sleeve 3 inserts downthehole to the last rod end of solenoid valve 1, 5 cartridge of locking button are in 3 downthehole to the low end position of lock sleeve are used for locking coil 2. The lock sleeve 3, the lock plate 4 and the locking button 5 are three independent parts, when the electromagnetic valve 1 and the coil 2 are fixedly installed, after the electromagnetic valve 1 is sleeved on the coil 2, the lock plate 4 is firstly placed at the upper end of the coil 2, then the lock sleeve 3 is inserted into an upper rod end hole of the electromagnetic valve 1, finally the locking button 5 is inserted into a hole of the lock sleeve 3, and the locking button is slightly pressed downwards to a low-end position, so that the installation and the fixation of the electromagnetic valve 1 and the coil 2 are completed; at this time, the coil 2 cannot be pulled out or fall off upwards, but the coil 2 can be rotated in the circumferential direction by a slight moment to facilitate wiring of the coil 2.

In this embodiment, the lock sleeve 3 is a cylindrical thin-wall pipe sleeve, and the lock sleeve 3 is in a freely-shrinkable pipe state; the locking button 5 is inserted into the lock sleeve 3 and expands to enable the lock sleeve 3 to expand and lock in an upper rod end hole of the electromagnetic valve 1; the locking plate 4 is a disc-shaped structure, and when the locking button 5 expands, pressure is applied to the locking plate 4 along the axis direction of the central hole so as to compress and fix the coil 2. The lock sleeve 3 and the lock plate 4 are made of beryllium bronze, and the locking button 5 is made of engineering plastics.

An upper rod end hole of the electromagnetic valve 1 is a stepped hole, and the aperture of the lower side of the upper rod end hole is larger than that of the upper side of an upper rod port; the front end of the lock sleeve 3 is matched with the end hole of the upper rod, a turned edge is arranged, and the rear end of the lock sleeve 3 is matched with the lock plate 4 and is also provided with a turned edge. When the locking button 5 is inserted into the lock sleeve 3, the wall pipe of the lock sleeve 3 is expanded, and the curled edge arranged at the front end of the lock sleeve 3 falls into the part with larger aperture at the lower side in the rod core hole of the solenoid valve 1, so that the curled edge of the lock sleeve 3 is hung on the step in the rod core hole of the solenoid valve 1 during expansion, and the lock sleeve 3 is prevented from withdrawing from the rod core of the solenoid valve 1; the rear end of the lock sleeve 3 is matched with the lock plate 4 and is also provided with a turned edge, the turned edge can be pressed on the lock plate 4, and the lock plate 4 is pressed on the coil 2, so that the series of assembly relations ensure that the coil 2 is reliably fixed on the electromagnetic valve 1; when the coil 2 needs to be detached, as long as the locking button 5 is pulled out, since the lock sleeve 3 only generates elastic deformation when the locking button 5 is inserted, once the locking button 5 is pulled out, the lock sleeve 3 is restored to a free state, and at the moment, the tubular part does not generate elastic deformation to expand and press the coil 2, so that the coil 2 can be freely pulled out and can be easily taken down.

The middle part of the lock sleeve 3 is of a drum-shaped concave structure, the locking button 5 is unfolded when coming in and going out of the lock sleeve 3 and is made into a shape with a large front end, a large middle waist and a small diameter, and the locking button 5 is tightly hooped at the drum-shaped concave part of the middle waist by elastic contraction of the lock sleeve 3 after being inserted into the lock sleeve 3 so as to ensure that the locking button 5 cannot be easily loosened and fall out after being inserted into the lock sleeve.

For convenience of description, the descriptions of directions such as "up", "down", "left", "right", "front", "back", etc. referred to herein are consistent with the left-right direction of the drawings, but do not limit the structure of the present invention; the above detailed description of the embodiments of the present invention is only for exemplary purposes, and the present invention is not limited to the above detailed description. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.

Claims (5)

1. The utility model provides an bloated round pin formula coil fixing device, includes coil (2) and solenoid valve (1), coil (2) suit is in on solenoid valve (1), its characterized in that:

still include lock sleeve (3), locking plate (4) and locking button (5), lock sleeve (3) with elastic original spare is adopted in locking plate (4), locking plate (4) are installed coil (2) upper end, lock sleeve (3) are inserted the last rod end of solenoid valve (1) is downthehole, locking button (5) cartridge is in the downthehole low end position of lock sleeve (3) is used for the locking coil (2).

2. The expanding pin coil fixture of claim 1, further comprising:

the lock sleeve (3) is a cylindrical thin-wall pipe sleeve, and the lock sleeve (3) is in a freely-contracted pipe state; the locking button (5) is inserted into the lock sleeve (3) and expands to enable the lock sleeve (3) to expand and be locked in an upper rod end hole of the electromagnetic valve (1); the locking plate (4) is of a disc-shaped structure, and when the locking button (5) is expanded, pressure is applied to the locking plate (4) along the axis direction of the central hole so as to compress and fix the coil (2).

3. The expanding pin coil fixture of claim 2, wherein:

the lock sleeve (3) and the lock plate (4) are made of beryllium bronze, and the locking button (5) is made of engineering plastics.

4. The expanding pin coil fixture of any one of claims 1 to 3, wherein:

an upper rod end hole of the electromagnetic valve (1) is a stepped hole, and the aperture of the lower side of the upper rod end hole is larger than that of the upper side of an upper rod port; the front end of the lock sleeve (3) is matched with the end hole of the upper rod, a turned edge is arranged on the end hole of the upper rod, and the rear end of the lock sleeve (3) is matched with the locking plate (4) and is also provided with a turned edge.

5. The expanding pin coil fixture of claim 4, wherein:

the middle part of the lock sleeve (3) is of a drum-shaped concave structure.

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