Double-holding type electromagnetic lock with anti-vibration function

Abstract

The utility model discloses a double-holding type electromagnetic lock with a vibration-proof function, which comprises a shell, a bobbin, a coil, a permanent magnet, a fixed iron core A, a fixed iron core B, a push rod and a bottom cover, and relates to the field of electromagnetic locks. The push rod does not move up and down and disengage under the action of the spring, and the application range of the electromagnetic lock is widened.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic locks, specifically a double-holding electromagnetic lock with anti-vibration function. Background Technology

[0002] An electromagnetic lock is a device that uses electromagnetic principles to achieve mechanical locking / unlocking, and is widely used in security, automation control, transportation, industrial equipment and other fields. Its core principle is to use current to excite a coil to generate a magnetic field, which attracts a metal armature (lock tongue) to achieve locking, and releases when the power is cut off.

[0003] The double-holding electromagnetic lock was developed based on the traditional electromagnetic lock technology to meet the requirements of power failure bistable state and energy saving. It has obvious advantages over the traditional electromagnetic lock in some application scenarios. However, in the application scenarios where the double-holding electromagnetic lock is used, the vibration generated by itself during operation and some vibrations caused by external factors may cause the electromagnetic lock to fall off or shift in position. Summary of the Invention

[0004] (a) Technical problems to be solved.

[0005] To address the shortcomings of existing technologies, this invention provides a probe for an impedance tester, which solves the problems of resistance deviation and contact instability mentioned in the background section.

[0006] (ii) Technical solution.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a double-holding electromagnetic lock with anti-vibration function, comprising a housing, a spool, a coil, a permanent magnet, a fixed iron core A, a fixed iron core B, a push rod, and a bottom cover. The coil is fixedly sleeved on one side of the spool, and the permanent magnet is fixedly installed in a groove on the other side of the spool. The housing is U-shaped and has a through hole at the bottom. The fixed iron core A has a through hole in the middle and is fixed to the bottom of the housing. The fixed iron core B is fixedly connected to the bottom cover. The characteristic feature is that the above-mentioned electromagnetic lock... The lock also includes an elastic mechanism and a movable iron core. The movable iron core has a receiving cavity with two through-holes. The diameter of the through hole at one end of the receiving cavity is smaller than the diameter of the receiving cavity. After the elastic mechanism is fixedly connected to one end of the push rod, it is placed in the receiving cavity of the movable iron core, so that the push rod can perform axial reciprocating motion relative to the movable iron core. The spool has an axially extending through hole. The movable iron core is directly or indirectly slidably connected to the spool through the through hole in the spool. The other end of the push rod extends out of the housing through the through hole at the bottom of the housing and the fixed iron core A.

[0008] Preferably, the electromagnetic lock further includes a non-magnetic tube, which is fixedly connected to the through hole provided in the spool, and the movable iron core is slidably connected to the non-magnetic tube.

[0009] Preferably, the elastic mechanism includes a screw, a spring, a spring base A, a spring base B, and a retaining ring. One end of the screw has a radially protruding limiting portion. The spring base A is sleeved on the screw and abuts against the protruding limiting portion. One end of the spring sleeved on the screw abuts against the spring base A. The spring base B is inserted into one end of the cavity of the movable iron core. The combination of the screw, spring, and spring base A is inserted into the other end of the cavity of the movable iron core. The other end of the spring abuts against the spring base B. The push rod is fixedly connected to the screw through a through hole at one end of the cavity. The retaining ring is engaged with the movable iron core through a groove at the other end of the cavity to prevent the screw from falling out of the cavity.

[0010] Preferably, the elastic mechanism includes a telescopic rod with a built-in spring and a retaining ring. One end of the telescopic rod is provided with a radially protruding limiting part, and the other end is inserted into the other end of the movable iron core receiving cavity and fixedly connected to the push rod. The retaining ring is engaged with the movable iron core through a groove provided at the other end of the receiving cavity and abuts against the limiting part of the telescopic rod.

[0011] Preferably, the diameter of the telescopic rod is smaller than the inner diameter of the movable iron core receiving cavity, but larger than the diameter of the hole through one end of the receiving cavity.

[0012] Preferably, the elastic mechanism includes a spring and a retaining ring. One end of the push rod has a radial protrusion that abuts against one end of the spring. The diameter of the radial protrusion is smaller than the inner diameter of the movable iron core receiving cavity and larger than the diameter of the through hole at one end of the receiving cavity. The retaining ring is engaged with the movable iron core and abuts against the other end of the spring through a groove provided at the other end of the receiving cavity.

[0013] Preferably, the material of the non-magnetic tube is metallic copper or plastic.

[0014] (iii) Beneficial effects.

[0015] This utility model provides a double-holding electromagnetic lock with anti-vibration function, which has the following advantages: when the electromagnetic lock is subjected to external vibration and collision, the push rod will not move up and down or disengage under the action of the spring. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the disassembly and elastic mechanism of this utility model.

[0017] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0018] Figure 3 This is a schematic diagram of the second elastic mechanism of this utility model.

[0019] Figure 4 This is a schematic diagram of the elastic mechanism of this utility model.

[0020] In the diagram: 1. Housing; 2. Bollard; 3. Coil; 4. Permanent magnet; 5. Fixed iron core A; 6. Fixed iron core B; 7. Push rod; 8. Bottom cover; 9. Elastic mechanism; 10. Movable iron core; 11. Non-magnetic tube; 91. Screw; 92. Spring; 93. Spring base A; 94. Spring base B; 95. Retaining ring; 96. Telescopic rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] Please see Figure 1-2 A double-holding electromagnetic lock with anti-vibration function includes a housing, a spool, a coil, a permanent magnet, a fixed iron core A, a fixed iron core B, a push rod, and a bottom cover. The coil is fixedly sleeved on one side of the spool, and the permanent magnet is fixedly installed in a groove on the other side of the spool. The housing is U-shaped and has a through hole at the bottom. The fixed iron core A has a through hole in the middle and is fixed to the bottom of the housing. The fixed iron core B is fixedly connected to the bottom cover. The electromagnetic lock further includes an elastic mechanism, a movable iron core, and a non-magnetic tube. The elastic mechanism includes a screw, a spring, a spring base A, a spring base B, and a retaining ring. The movable iron core has a cavity with two through-holes. The diameter of the through hole at one end of the cavity is smaller than the diameter of the cavity. The spring base A is sleeved on the screw and has a protruding limiting element. The spring is sleeved on the screw and abuts against the spring base A. The spring base B is inserted into one end of the cavity of the movable iron core. The screw, spring, and spring base A are inserted into the other end of the cavity of the movable iron core. The other end of the spring abuts against the spring base B. The push rod is fixedly connected to the screw through the through hole at one end of the cavity. The retaining ring is engaged with the movable iron core through the groove at the other end of the cavity to prevent the screw from falling out of the cavity. The push rod can reciprocate axially relative to the movable iron core. The spool has an axially extending through hole. The non-magnetic tube is fixedly connected in the through hole of the spool. The movable iron core is slidably connected to the non-magnetic tube. The other end of the push rod extends out of the housing through the through hole at the bottom of the housing (1) and the fixed iron core A. Example 2

[0023] Please see Figure 1 , Figure 3Based on Embodiment 1, the elastic mechanism consists of a telescopic rod with a built-in spring and a retaining ring. One end of the telescopic rod has a radially protruding limiting part, and the other end is inserted into the other end of the movable iron core receiving cavity and fixedly connected to the push rod. The retaining ring is engaged with the movable iron core through a groove provided at the other end of the receiving cavity and abuts against the limiting part of the telescopic rod. The diameter of the telescopic rod is smaller than the inner diameter of the movable iron core receiving cavity and larger than the diameter of the through hole at one end of the receiving cavity. Example 3

[0024] Please see Figure 1 , Figure 4 Based on Embodiment 1, the elastic mechanism consists of a spring and a retaining ring. One end of the push rod has a radial protrusion that abuts against one end of the spring. The diameter of the radial protrusion is smaller than the inner diameter of the movable iron core receiving cavity and larger than the diameter of the through hole at one end of the receiving cavity. The retaining ring is engaged with the movable iron core through a groove at the other end of the receiving cavity and abuts against the other end of the spring. Example 4

[0025] Please see Figure 1-2 Based on embodiment 1, 2 or 3, the material of the non-magnetic tube is metallic copper or plastic.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-holding electromagnetic lock with anti-vibration function, comprising a housing (1), a spool (2), a coil (3), a permanent magnet (4), a fixed iron core A (5), a fixed iron core B (6), a push rod (7), and a bottom cover (8), wherein the coil (3) is fixedly sleeved on one side of the spool (2), and the permanent magnet (4) is fixedly installed in a groove provided on the other side of the spool (2), the housing (1) is U-shaped and has a through hole at the bottom, the fixed iron core A (5) has a through hole in the middle and is fixed to the bottom of the housing (1), and the fixed iron core B (6) is fixedly connected to the bottom cover (8), characterized in that: The electromagnetic lock also includes an elastic mechanism (9) and a movable iron core (10). The movable iron core (10) has a cavity with two through ends. The diameter of the through hole at one end of the cavity is smaller than the diameter of the cavity. The elastic mechanism (9) is fixedly connected to one end of the push rod (7) and placed into the cavity of the movable iron core (10), so that the push rod (7) can move axially back and forth relative to the movable iron core (10). The spool (2) has an axially extending through hole. The movable iron core (10) is directly or indirectly slidably connected to the spool (2) through the through hole in the spool (2). The other end of the push rod (7) extends out of the housing (1) through the through hole at the bottom of the housing (1) and the fixed iron core A (5).

2. The electromagnetic lock with dual-holding and anti-vibration function according to claim 1, characterized in that: The electromagnetic lock also includes a non-magnetic tube (11), which is fixedly connected to the through hole provided in the linear shaft (2), and the movable iron core (10) is slidably connected to the non-magnetic tube (11).

3. A double-holding electromagnetic lock with anti-vibration function according to claim 1 or 2, characterized in that: The elastic mechanism (9) includes a screw (91), a spring (92), a spring base A (93), a spring base B (94), and a retaining ring (95). One end of the screw (91) has a radially protruding limiting portion. The spring base A (93) is sleeved on the screw and abuts against the protruding limiting portion. One end of the spring (92) is sleeved on the screw (91) and abuts against the spring base A (93). The spring base B (94) is inserted into the movable iron core (10). At one end of the cavity, the combination of the screw (91), spring (92), and spring base A (93) is inserted into the other end of the cavity of the movable iron core (10). The other end of the spring (92) abuts against the spring base B (94). The push rod (7) is fixedly connected to the screw (91) through the through hole at one end of the cavity. The retaining ring (95) is engaged with the movable iron core (10) through the groove at the other end of the cavity to prevent the screw (91) from falling out of the cavity.

4. A double-holding electromagnetic lock with anti-vibration function according to claim 1 or 2, characterized in that: The elastic mechanism (9) includes a telescopic rod (96) with a built-in spring and a retaining ring (95). One end of the telescopic rod (96) is provided with a radially protruding limiting part, and the other end is inserted into the other end of the cavity of the movable iron core (10) and fixedly connected to the push rod (7). The retaining ring (95) is engaged with the movable iron core (10) through the groove provided at the other end of the cavity and abuts against the limiting part of the telescopic rod (96).

5. The electromagnetic lock with dual-holding and anti-vibration function according to claim 4, characterized in that: The diameter of the telescopic rod (96) is smaller than the inner diameter of the cavity of the movable iron core (10) and larger than the diameter of the hole through one end of the cavity.

6. A double-retaining electromagnetic lock with anti-vibration function according to claim 1 or 2, characterized in that: The elastic mechanism (9) includes a spring (92) and a retaining ring (95). One end of the push rod (7) is provided with a radial protrusion and abuts against one end of the spring (92). The diameter of the radial protrusion is smaller than the inner diameter of the cavity of the movable iron core (10) and larger than the diameter of the through hole at one end of the cavity. The retaining ring (95) is engaged with the movable iron core (10) and abuts against the other end of the spring (92) through a groove provided at the other end of the cavity.

7. The electromagnetic lock with dual retention and anti-vibration function according to claim 2, characterized in that: The material of the non-magnetic tube (11) is metallic copper or plastic.

Images