CN213654514U

CN213654514U - Magnetic lock

Info

Publication number: CN213654514U
Application number: CN202022011608.8U
Authority: CN
Inventors: 唐文诗
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-07-09
Anticipated expiration: 2030-09-15

Abstract

A magnetic lock is mainly used for a door lock of a switch cabinet. The cabinet door is characterized in that a closed magnetic loop is formed by a magnet and a plurality of structures, and a very strong tension force is formed to lock the cabinet door. In the event of a short-circuit fault inside the switchgear, the arc inside the cabinet causes the air inside the cabinet to expand rapidly. At this moment under the effect of inflation gas pressure, need the cabinet door to do the appropriate pressure release of opening, the utility model discloses the purpose of the spring that sets up is under the cabinet door receives the condition of certain locking force, if compression spring when receiving more powerful effect lets the cabinet door do the appropriate opening, unloads the pressure in the cabinet. The magnet is used as a part of a closed magnetic circuit, and the magnetic circuit is gradually switched on or switched off through the rotation of the shaft, so that the operating force is relatively small, and the purposes of locking and unlocking are achieved. The purpose of the breaking-down of the connecting plates is to reduce the limit of the switchgear on the size of the electrical components installed. The utility model discloses simple structure, the preparation technology requirement is not high, the invariable advantage of locking force.

Description

Magnetic lock

Technical Field

The utility model belongs to the technical field of the tool to lock is made, especially, relate to a magnetic lock.

Background

In the switchgear cabinet industry, door locks are the most common elements. From an aesthetic and practical perspective, engineers in the industry have made a lot of work. But also continues to work in an effort to innovate. As a door lock of an electric power device, there are roughly the following requirements: firstly, the cabinet door is required to be locked tightly, and sometimes, under the condition of locking the door tightly, the door lock is required to have certain elasticity. This is because, when a short-circuit fault occurs in the switchgear cabinet, the gas expands rapidly under the action of the arc in the air inside the cabinet. At this time, the cabinet door is required to be able to open a certain gap, so that high-pressure gas can be discharged from the opened gap between the cabinet door and the cabinet body. So as to avoid the risk that the switch cabinet is cracked due to overlarge gas pressure in the cabinet.

From the basic functional point of view, there are roughly three types of door locks for switch cabinets. The first type is a rotary lock tongue type structure, the lock tongue rotates to clamp the door frame after the cabinet door is closed, and the purpose of locking the door is achieved. Therefore, when gas pressure is generated in the cabinet, the cabinet door can be opened by a certain gap. The lock core of some locks is provided with a spring, so that the locks have good elasticity. Because the thickness of door is different, the adjustment function of this type of lock is poor, and under the great condition of configuration deviation, the cabinet door is locked the effect not very good sometimes, and the spring bolt usually does not require higher quality steel sheet to make, also easy deformation when consequently the spring bolt atress. The other is a bolt type structure, which locks the door by operating the up-and-down movement of the bolt rod to make the bolt rod fix the door frame. Because the diameter of the bolt rod is not suitable to be too large, the strength of the bolt rod can be influenced, and when the bolt rod is influenced by processing and assembling, the tightness of the door lock can not meet the requirement or the situation that the door is difficult to open due to overlarge operating force occurs. The third type of lock is a screw-threaded connection directly to the doorframe through the door, which has the disadvantage of no elasticity and a small range of applications. The former two locks have the phenomenon that the door lock is not tight, namely, the difference of the locking force is large, or the lock is influenced by batch production, and the adjusting effect is not good. When the switch cabinet is required to prevent dust from entering the switch cabinet, the former two locks are not ideal. The third type, while adequate, operates at a slow speed and the screw is not perfectly aligned with the threaded hole in the door frame.

SUMMERY OF THE UTILITY MODEL

As shown in fig. 1, the idea of the present invention is to combine the components fixed on the side columns of the door and the cabinet to form a closed magnetic loop when the cabinet door is closed. In a closed magnetic circuit, the attraction between the parts abutting the guide rod and magnet is best. Therefore, the magnet with smaller volume can achieve enough attraction force, thereby achieving the aim of locking the door. When the cabinet door needs to be opened, the cabinet door is difficult to open directly due to the action of magnetic force. The rotation of the shaft is operated to drive the magnet to rotate, so that the contact area between the magnet and the guide rod is gradually reduced, and the magnetic flux conduction area is gradually reduced until the magnet is separated from the contact with the guide rod, which is easier to realize. After the magnet rotates to be completely separated from the contact with the guide rod, the formed magnetic loop loses the magnet, and the attraction between the guide rods on the right side disappears. The cabinet door can be opened. As shown in fig. 2, the width of the side upright posts of the cabinet body in the left-right direction affects the size of the electrical components embedded in the cabinet, and the smaller the width of the side upright posts of the cabinet body in the left-right direction is, the more the electrical components with larger size can be loaded into or taken out of the cabinet. Therefore, by providing the connecting plates in two parts, if a larger-sized electric component needs to be implanted or removed, the combination of the connecting plates can be disassembled, and the size of the implanted electric component can be increased. The added bent plate is used for limiting the rotation which can be generated by the connecting plate along the axial direction of the connected guide rod. As shown in fig. 3, the utility model discloses two from the butt joint see that on partly being fixed in cabinet body side stand through cover and nut, on another part base plate and nut were fixed in the door of cabinet, when the cabinet door was closed, the mutual butt of guide arm and guide arm that corresponds rotated magnet to the angle of settlement, just the butt between magnet and the corresponding guide arm, the utility model discloses be in lock state. In fig. 3, 01 is a cabinet side column, 02 is a sealing rubber strip, 03 is a cabinet door, and 04 is a lock nut.

Technical scheme

A magnetic lock comprising: the device comprises a magnet, a first guide rod, a first spring, a connecting plate, a second spring, a second guide rod, a third spring, a sleeve, a fourth spring, a third guide rod, a base plate, a handle, a shaft and a fourth guide rod; the method is characterized in that:

as shown in fig. 1, the lower end of the fourth guide rod passes through the hole at the left end of the base plate from the upper surface of the base plate and is in threaded connection with the hole at the left end of the handle to a set depth; the lower end of the third guide rod penetrates through a hole at the right end of the base plate from the upper surface of the base plate and is in threaded connection with a hole at the right end of the handle to a set depth; the upper end of the shaft penetrates through a hole in the middle of the base plate from the bottom of the base plate, penetrates through a set number of gaskets and penetrates through a hole on the right side of the base plate from the bottom of the magnet, and the upper end of the double-nut connecting shaft is connected with the upper end of the shaft; the lower end face of the magnet is abutted against the upper end face of the fourth guide rod, and the shaft rotates to drive the magnet to rotate; the connection of the shaft and the magnet is to facilitate the magnet to be separated from the formed magnetic loop, so that the attraction force between the guide rods and the magnet disappear. The locking of the cabinet door is released.

The upper end surface of the base plate is provided with three sleeve-shaped bulges, and the central holes of the three sleeves are respectively coaxial with the corresponding holes; wherein, the outer cylindrical surface of the sleeve protruding from the left side and the right side of the substrate is a connecting thread; the sleeve-type protrusion is provided for guiding the guide rod or shaft, and the sleeve is provided with a thread on the outside for fixing on the cabinet door.

The lower end face of the first guide rod is abutted against the upper end face of the magnet, the upper end of the first guide rod penetrates through a central hole of the first spring, penetrates through a set number of gaskets, penetrates through a left side hole of the connecting plate and penetrates through a central hole of the second spring; the nut is in threaded connection with the upper end of the first guide rod, and the lower end face of the nut is in pressure connection with the upper end of the second spring; the upper end face of the first spring is abutted to the washer on the first spring, and the lower end of the first spring is abutted to the platform at the lower part of the first guide rod.

The lower end face of the second guide rod is abutted to the upper end face of the third guide rod, the upper end of the second guide rod penetrates through a center hole of the fourth spring and penetrates through a center hole of the sleeve, the lower end face of the sleeve is in compression joint with the upper end of the fourth spring, and the lower end of the fourth spring is in compression joint with a platform on the lower portion of the second guide rod. The upper end of the second guide rod penetrates through a right hole of the connecting plate and a central hole of the third spring; the nut is in threaded connection with the upper end of the second guide rod, and the lower end face of the nut is in pressure connection with the upper end of the third spring;

the outer cylindrical surface of the upper part of the sleeve is provided with connecting threads; the sleeve is fixed on the upright post at the side of the cabinet body through a nut.

The first guide rod, the connecting plate, the second guide rod, the third guide rod, the handle, the fourth guide rod and the washer are made of low-magnetic-resistance materials. The holes through which the first guide rod, the second guide rod, the third guide rod and the fourth guide rod pass are in clearance fit. The purpose of installing the spring is to make the closed door have a certain elastic pressure, so that when the inside of the cabinet is in failure, high-pressure gas is discharged out of the cabinet through the door seam pushed open, and the inside of the cabinet is prevented from being cracked. This kind of function is mainly used for the cubical switchboard that the short-circuit current is big in the cabinet.

The upper end of the bent plate is fixedly connected with a set position in the middle of the lower end face of the connecting plate, and a hole for connection is formed in the set position of the lower part of the bent plate. The holes for connection are formed in the set positions of the lower parts of the bent plates and are used for connecting the side upright posts of the cabinet body, so that the phenomenon that the connecting plates rotate due to the action of operating force is prevented.

The bent plate, the sleeve, the base plate and the shaft are made of high-magnetic-resistance materials. The aim is to prevent the magnetism of the cabinet body from influencing the cabinet body.

As shown in fig. 2, the connecting plates are composed of a first connecting plate and a second connecting plate and are made of low-magnetic-resistance materials; the right end of the first connecting plate is fixedly connected with the left end of the second connecting plate through a screw. This is done to allow larger sized electrical components to be loaded and unloaded from the cabinet.

The utility model has the advantages of, the sufficient suction of magnet makes the cabinet door have sufficient locking force, and the closed magnetic circuit that constitutes has sufficient magnetic flux for the size of the magnet that sets up reduces. The spring that sets up makes the utility model discloses have certain elasticity, and elasticity size is adjustable, satisfies the requirement of some cubical switchboard. In the case of sufficient structural strength. The closed magnetic loop ensures that the force for closing the door is constant, and the closing gap of the cabinet door is small. Under the condition that the cabinet body is provided with the sealing rubber strip, the cabinet door is easy to realize sealing and closing. And aforementioned bolt formula structure and lock tongue formula structure, the restriction of the structure of bolt and spring bolt is difficult to design intensity very big, and bolt and spring bolt atress warp easily, cause locking force not enough, and the cabinet door gap is inhomogeneous or the great condition in gap takes place. The utility model discloses also need not too complicated technology in the aspect of manufacturing. Simple structure and easy manufacture.

Drawings

FIG. 1 is a schematic view of a magnetic lock assembly;

FIG. 2 is a schematic diagram of a derivative assembly of a magnetic lock;

fig. 3 is a schematic view of a magnetic lock in an open state of the door.

Detailed Description

Examples

A magnetic lock comprising: the device comprises a magnet 1, a first guide rod 2, a first spring 3, a connecting plate 4, a second spring 5, a second guide rod 7, a third spring 8, a sleeve 9, a fourth spring 10, a third guide rod 11, a base plate 12, a handle 13, a shaft 14 and a fourth guide rod 15; the method is characterized in that:

as shown in fig. 1, the lower end of the fourth guide rod 15 passes through the hole at the left end of the base plate 12 from above and is screwed with the hole at the left end of the handle 13 to a set depth; the lower end of the third guide rod 11 passes through a hole at the right end of the base plate 12 from the upper surface of the base plate and is in threaded connection with a hole at the right end of the handle 13 to a set depth; the upper end of the shaft 14 passes through a hole in the middle of the base plate 12 from the bottom, passes through a set number of washers and passes through a hole on the right side of the magnet 1 from the bottom, and is connected with the upper end of the shaft 14 by a double nut; the lower end face of the magnet 1 is abutted against the upper end face of the fourth guide rod 15, and the shaft 14 rotates to drive the magnet 1 to rotate; the third guide rod 11 and the fourth guide rod 15 are connected to corresponding holes of the handle 13 to a set depth, which is intended to be embodied in that the connection depth is adjustable. Thus being beneficial to the utility model to reach the ideal functional state when in use. The shaft 14 is used as a part for transmitting driving force by a key, and the magnet 1 is driven by the key to rotate to enter and leave a magnetic circuit formed by the magnet and the shaft, so that the purposes of locking and unlocking are achieved.

The upper end surface of the base plate 12 is provided with three sleeve-shaped bulges, and the central holes of the three sleeves are respectively coaxial with the corresponding holes; wherein, the outer cylindrical surface of the sleeve protruding from the left side and the right side of the base plate 12 is a connecting thread; the three sleeve-like projections are intended to provide good guidance of the guide rod and the shaft.

The lower end face of the first guide rod 2 is abutted against the upper end face of the magnet 1, the upper end of the first guide rod 2 penetrates through a central hole of the first spring 3, a set number of gaskets, a left hole of the connecting plate 4 and a central hole of the second spring 5; the nut is in threaded connection with the upper end of the first guide rod 2, and the lower end face of the nut is in pressure connection with the upper end of the second spring 5; the upper end face of the first spring 3 abuts against a washer on the upper face, and the lower end of the first spring abuts against a platform on the lower portion of the first guide rod 2.

The lower end face of the second guide rod 7 is abutted to the upper end face of the third guide rod 11, the upper end of the second guide rod 7 penetrates through a center hole of the fourth spring 10 and penetrates through a center hole of the sleeve 9, the lower end face of the sleeve 9 is in compression joint with the upper end of the fourth spring 10, and the lower end of the fourth spring 10 is in compression joint with a platform at the lower part of the second guide rod 7. The upper end of the second guide rod 7 passes through a right hole of the connecting plate 4 and a central hole of the third spring 8; the nut is in threaded connection with the upper end of the second guide rod 7, and the lower end face of the nut is in press connection with the upper end of the third spring 8; this assembly is embodied in such a way that it forms a closed magnetic circuit with the aforementioned parts, while allowing the closed magnetic circuit to have a certain telescopic elasticity.

The outer cylindrical surface of the upper part of the sleeve 9 is provided with connecting threads; the sleeve 9 is conveniently fixed on the upright post at the side of the cabinet body.

The first guide rod 2, the connecting plate 4, the second guide rod 7, the third guide rod 11, the handle 13, the fourth guide rod 15 and the washer are made of low-magnetic-resistance materials; the holes through which the first guide rod 2, the second guide rod 7, the third guide rod 11 and the fourth guide rod 15 penetrate are in clearance fit. The low reluctance is beneficial to the conduction of the magnetic flux of the magnet, and the adjacent parts in the magnetic loop have enough attraction force when the magnet is closed.

The upper end of the bent plate 6 is fixedly connected with a set position in the middle of the lower end face of the connecting plate 4, and a hole for connection is formed in the set position of the lower part of the bent plate 6.

The bent plate 6, the sleeve 9, the base plate 12 and the shaft 14 are made of high-magnetic-resistance materials, and magnetic flux generated by the magnet is prevented from passing through the cabinet body to form a magnetic circuit. The connecting plate 4 is composed of a first connecting plate 16 and a second connecting plate 17 and is made of low-magnetic-resistance materials; the right end of the first connecting plate 16 is fixedly connected with the left end of the second connecting plate 17 through screws. The way of blocking the magnetic force line of the magnet to form a closed magnetic loop through the components of the cabinet body is to reduce the influence of the magnetism of the magnet on the cabinet body, and the magnetic flux generated by the magnet basically passes through the magnet 1, the first guide rod 2, the connecting plate 4, the second guide rod 7, the third spring 8, the sleeve 9, the third guide rod 11, the handle 13 and the fourth guide rod 15. The purpose of dividing the web into two parts is that the part to the left of the web can be quickly removed as required, as shown in figure 2. Therefore, the size of the electric element implanted in the cabinet can be larger, and the implantation or the removal of the electric element with larger size cannot be influenced by the left half part of the connecting plate. The reason for the removal of the electrical component is the operation of the component when it needs to be replaced or when it needs to be repaired.

The technical characteristics of the utility model are embodied, utilize the closed circuit of magnetism for the magnetic flux is enough big, and mutual actuation face need not dispose too bulky magnet under the condition that has sufficient actuation force. Because the closed magnetic loop with large magnetic flux is formed, the component loop of the magnetic force line in the air is very small under the condition that the cabinet door is closed, and the influence on some devices in the cabinet can not be formed.

Claims

1. A magnetic lock, comprising: the device comprises a magnet (1), a first guide rod (2), a first spring (3), a connecting plate (4), a second spring (5), a second guide rod (7), a third spring (8), a sleeve (9), a fourth spring (10), a third guide rod (11), a base plate (12), a handle (13), a shaft (14) and a fourth guide rod (15); the method is characterized in that: the lower end of a fourth guide rod (15) penetrates through a hole at the left end of the base plate (12) from the upper surface of the base plate, and is in threaded connection with a hole at the left end of the handle (13) to a set depth; the lower end of the third guide rod (11) penetrates through a hole at the right end of the base plate (12) from the upper surface of the base plate, and is in threaded connection with a hole at the right end of the handle (13) to a set depth; the upper end of the shaft (14) penetrates through a hole in the middle of the base plate (12) from the bottom, penetrates through a set number of gaskets and penetrates through a hole on the right side of the magnet (1) from the bottom, and is connected with the upper end of the shaft (14) through double nuts; the lower end face of the magnet (1) is abutted against the upper end face of the fourth guide rod (15), and the shaft (14) rotates to drive the magnet (1) to rotate; the upper end surface of the base plate (12) is provided with three sleeve-shaped bulges, and the central holes of the three sleeves are coaxial with the corresponding holes respectively; wherein, the outer cylindrical surface of the sleeve protruding from the left side and the right side of the base plate (12) is a connecting thread;

the lower end face of the first guide rod (2) is abutted against the upper end face of the magnet (1), the upper end of the first guide rod (2) penetrates through a center hole of the first spring (3), a set number of gaskets, a left hole of the connecting plate (4) and a center hole of the second spring (5); the nut is in threaded connection with the upper end of the first guide rod (2), the lower end face of the nut is in press connection with the upper end of the second spring (5), and the lower end of the second spring (5) is abutted against the upper end face of the connecting plate (4); the upper end surface of the first spring (3) is abutted to a gasket on the upper surface of the first spring, and the lower end of the first spring is abutted to a platform at the lower part of the first guide rod (2);

the lower end face of the second guide rod (7) is abutted against the upper end face of the third guide rod (11), the upper end of the second guide rod (7) penetrates through a central hole of a fourth spring (10) and a central hole of a sleeve (9), the lower end face of the sleeve (9) is in compression joint with the upper end of the fourth spring (10), and the lower end of the fourth spring (10) is in compression joint with a platform at the lower part of the second guide rod (7); the upper end of the second guide rod (7) penetrates through a right hole of the connecting plate (4) and a central hole of the third spring (8); the nut is in threaded connection with the upper end of the second guide rod (7), the lower end face of the nut is in press connection with the upper end of the third spring (8), and the lower end of the third spring (8) is abutted against the upper end face of the connecting plate (4);

the outer cylindrical surface of the upper part of the sleeve (9) is provided with connecting threads;

the first guide rod (2), the connecting plate (4), the second guide rod (7), the third guide rod (11), the handle (13), the fourth guide rod (15) and the gasket are made of low-magnetic-resistance materials; the holes through which the first guide rod (2), the second guide rod (7), the third guide rod (11) and the fourth guide rod (15) penetrate are in clearance fit.

2. A magnetic lock as claimed in claim 1, wherein: the upper end of the bent plate (6) is fixedly connected with a set position in the middle of the lower end face of the connecting plate (4), and a hole for connection is formed in the set position of the lower part of the bent plate (6).

3. A magnetic lock as claimed in claim 2, wherein: the bending plate (6), the sleeve (9), the base plate (12) and the shaft (14) are made of high-magnetic-resistance materials.

4. A magnetic lock according to claim 3, wherein: the connecting plates (4) are composed of a first connecting plate (16) and a second connecting plate (17) and are made of low-magnetic-resistance materials; the right end of the first connecting plate (16) is fixedly connected with the left end of the second connecting plate (17) by a screw.