Electromagnetic lock and charging gun

Abstract

The utility model discloses an electromagnetic lock and a charging gun, and the electromagnetic lock comprises an electromagnetic device and a moving device. The electromagnetic device is provided with a moving cavity in the axial direction of the electromagnetic device, penetrating holes communicated with the moving cavity are formed in the two ends of the electromagnetic device in the axial direction of the electromagnetic device, the two ends of the moving device penetrate out of the penetrating holes respectively, and the moving device moves in the axial direction under the action of electromagnetic force of the electromagnetic device. A clearance part is arranged on the moving device, and an annular gap is formed between the clearance part and the through hole, so that the clearance part does not make contact with the hole wall of the through hole when moving in the axial direction. The utility model provides an electromagnetic lock and a charging gun. The technical problem that abrasion between penetrating holes in an existing electromagnetic lock moving device and an electromagnetic device is large is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic locks, in particular to an electromagnetic lock and a charging gun. Background Art

[0002] With the development of new energy electric vehicles, the popularity of electric vehicles is getting higher and higher, and the demand for charging equipment is increasing. As the most common charging interface of public charging piles, the importance of DC charging guns is self-evident. Charging guns have the characteristics of high power and high current, and misoperation may cause extremely serious harm to the human body. The electromagnetic lock is a key component to protect the reliability of the physical connection of the charging gun during charging. Whether the electromagnetic lock can work normally is a crucial concern during the charging process. The axial back and forth movement of the mobile device in the existing electromagnetic lock in the fixed iron core will cause wear, rust, and jamming, which will make the locking function of the electromagnetic lock fail. Utility Model Content

[0003] The main purpose of the utility model is to provide an electromagnetic lock, aiming to solve the technical problem of large wear between the existing moving device and the electromagnetic device.

[0004] To achieve the above object, the utility model provides an electromagnetic lock, comprising an electromagnetic device and a moving device.

[0005] The electromagnetic device is provided with a moving cavity along its axial direction, and through holes communicating with the moving cavity are provided at both ends of the electromagnetic device along its axial direction, and the two ends of the moving device pass through the through holes respectively, and the moving device moves along the axial direction under the electromagnetic force of the electromagnetic device;

[0006] The moving device is provided with a clearance portion, and an annular gap is provided between the clearance portion and the through hole, so that the clearance portion does not contact the wall of the through hole when moving along the axial direction.

[0007] Optionally, in one embodiment of the present invention, the moving device includes a moving rod and a movable iron core, the moving rod is provided with a connecting portion and a clearance portion adjacent to the connecting portion, the movable iron core is fixedly connected to the connecting portion, the movable iron core is accommodated inside the moving cavity, and the movable iron core drives the moving rod to move axially under the action of the electromagnetic force of the electromagnetic device.

[0008] Optionally, in one embodiment of the present invention, the distance from the air-avoiding portion to the perforated hole wall is 0.2 mm.

[0009] Optionally, in an embodiment of the present invention, the diameter of the connecting portion is equal to or greater than the diameter of the through hole.

[0010] Optionally, in one embodiment of the present invention, the electromagnetic device includes a yoke and a coil arranged inside the yoke, the yoke is provided with fixing holes at both ends along the axial direction, a fixed iron core is provided in the fixing hole, and the fixed iron core is provided with a through hole along the axial direction.

[0011] Optionally, in an embodiment of the present invention, the electromagnetic device further comprises a bobbin, the coil is wound around the outside of the bobbin, the movable cavity is formed inside the bobbin, and a magnetic block is circumferentially arranged on the outer surface of the middle portion of the bobbin.

[0012] Optionally, in an embodiment of the present invention, the avoidance portion includes a first avoidance section and a second avoidance section, and the first avoidance section and the second avoidance section are respectively arranged at two ends of the connecting portion;

[0013] The two ends of the moving rod away from the connecting part are further provided with extending parts, and the extending parts include a first extending section and a second extending section, the first extending section is connected to the first avoiding section, and the second extending section is connected to the second avoiding section.

[0014] Optionally, in an embodiment of the present invention, the moving device further includes a pressing device, and the pressing device is provided on at least one of the first extending section and the second extending section.

[0015] Optionally, in one embodiment of the present invention, the pressing device is an electromagnetic bead;

[0016] And / or, the moving rod is a tin bar.

[0017] The utility model also provides a charging gun, comprising a charging gun head and an electromagnetic lock as described in any one of the above items and arranged inside the charging gun head.

[0018] The electromagnetic lock of the technical solution of the utility model comprises an electromagnetic device and a moving device, the electromagnetic device is provided with a moving cavity along its axial direction, and the electromagnetic device is provided with through holes connected to the moving cavity at both ends of its axial direction, the two ends of the moving device respectively pass through the through holes, and the moving device moves axially under the action of the electromagnetic force of the electromagnetic device; a gap is provided on the moving device, and an annular gap is provided between the gap avoidance portion and the through hole, so that the gap avoidance portion does not contact the wall of the through hole when moving along the axial direction, thereby preventing friction between the moving device and the wall of the through hole and avoiding wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the electromagnetic lock of the utility model;

[0021] Figure 2 A top view of an embodiment of an electromagnetic lock of the utility model;

[0022] Figure 3 for Figure 2 Schematic diagram of the cross section at AA in the middle;

[0023] Figure 4 This is a schematic diagram of the three-dimensional exploded structure of an embodiment of the electromagnetic lock of the utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the mobile rod of the utility model.

[0025] Description of Figure Numbers:

[0026] 100. Electromagnetic lock; 1. Electromagnetic device; 11. Yoke; 12. Coil; 13. Magnetic block; 14. Fixed iron core; 15. Bobbin; 16. Moving cavity; 17. Perforation; 171. First avoidance hole; 172. Second avoidance hole; 2. Moving device; 21. Moving rod; 211. Avoidance portion; 2111. First avoidance section; 2112. Second avoidance section; 212. Connecting portion; 213. Extending portion; 2131. First extending section; 2132. Second extending section; 22. Movable iron core; 23. Pressing device.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] Electromagnetic lock is a security device that uses electromagnetic principle to achieve locking and unlocking. The working principle of electromagnetic lock is to use the magnetism of electromagnet to achieve the locking and unlocking functions. Electromagnetic lock can be used in various devices, such as charging guns, which use electromagnetic locks to achieve the locking and unlocking of charging guns. The axial back and forth movement of the mobile device in the existing electromagnetic lock in the fixed iron core will cause wear, rust, and jamming, which will make the locking function of the electromagnetic lock ineffective, posing a safety hazard.

[0032] In view of this, the utility model proposes an electromagnetic lock, which provides a clearance portion on the moving device, and an annular gap between the clearance portion and the through hole, so that the clearance portion does not contact the wall of the through hole when moving along the axial direction. The friction and wear between the moving device and the through hole are reduced, and the electromagnetic lock locking function failure caused by jamming is further avoided.

[0033] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.

[0034] like Figure 1 The electromagnetic lock 100 proposed in the embodiment of the utility model comprises an electromagnetic device 1 and a moving device 2. The electromagnetic device 1 is provided with a moving cavity 16 along its axial direction. The electromagnetic device 1 is provided with through holes 17 connected with the moving cavity 16 at both ends of its axial direction. The two ends of the moving device 2 respectively pass through the through holes 17. The moving device 2 moves axially under the action of the electromagnetic force of the electromagnetic device 1. The moving device 2 is provided with a gap avoidance portion 211. There is an annular gap between the gap avoidance portion 211 and the through hole 17 so that the gap avoidance portion 211 does not contact the wall of the through hole 17 when moving axially.

[0035] In the technical solution adopted in this embodiment, the electromagnetic lock 100 includes an electromagnetic device 1 and a moving device 2, wherein an electric current will pass through the electromagnetic device 1, and the electromagnetic force will be changed by the on and off of the electric current or the direction of the electric current, thereby controlling the moving device 2 to move axially. The electromagnetic device 1 is provided with a moving cavity 16 along its axial direction, and the electromagnetic device 1 is provided with a through hole 17 connected to the moving cavity 16 at both ends of its axial direction. The two ends of the moving device 2 pass through the through hole 17 respectively, and the moving device 2 moves axially under the action of the electromagnetic force of the electromagnetic device 1. During the movement of the moving device 2, friction will be generated at the contact part between the moving device 2 and the through hole 17, so that the part will be worn, thereby bringing safety hazards. By providing a clearance portion 211 on the moving device 2, there is an annular gap between the clearance portion 211 and the through hole 17, so that the clearance portion 211 does not contact the hole wall of the through hole 17 when moving axially, preventing the moving device 2 from rubbing against the hole wall of the through hole 17 during the axial movement, thereby reducing the wear between the moving device 2 and the hole wall of the through hole 17, and improving the safety performance.

[0036] Furthermore, in one embodiment of the utility model, the moving device 2 includes a moving rod 21 and a movable iron core 22. The moving rod 21 is provided with a connecting portion 212 and a gap 211 adjacent to the connecting portion 212. The movable iron core 22 is fixedly connected to the connecting portion 212. The movable iron core 22 is accommodated inside the moving cavity 16. The movable iron core 22 drives the moving rod 21 to move axially under the action of the electromagnetic force of the electromagnetic device 1.

[0037] In the technical solution adopted in this embodiment, the moving device 2 includes a moving rod 21 and a movable iron core 22. The moving rod 21 is a slender rod-shaped body, and its two ends are respectively passed through the through holes 17 at the two ends of the electromagnetic device 1, so that the moving rod 21 will not deviate when moving axially. The through holes 17 at the two ends of the electromagnetic device 1 are respectively the first avoidance hole 171 and the second avoidance hole 172. A connecting portion 212 is provided in the middle of the moving rod 21, and the movable iron core 22 is fixedly connected to the outer side of the connecting portion 212. The movable iron core 22 is accommodated in the moving cavity 16. Such a configuration enables the movable iron core 22 to move axially under the electromagnetic force of the electromagnetic device 1, thereby driving the moving rod 21 to move axially. A avoiding portion 211 is also provided on the moving rod 21 adjacent to the connecting portion 212, which are respectively the first avoidance section 2111 and the second avoidance section 2112. The first avoidance section 2111 is passed through the first avoidance hole 171, and the second avoidance section 2112 is passed through the second avoidance hole 172. With such arrangement, when the movable iron core 22 and the moving rod 21 move in the electromagnetic device 1 , the through hole 17 is always opposite to the clearance portion 211 , and there is always an annular gap between the through hole 17 and the moving rod 21 , without friction.

[0038] Furthermore, in an embodiment of the present invention, the distance from the air-avoiding portion 211 to the wall of the through hole 17 is 0.2 mm.

[0039] It is understandable that the distance from the avoidance portion 211 to the wall of the through hole 17 is preferably 0.2 mm. Such a setting can not only eliminate friction between the avoidance portion 211 and the wall of the through hole 17, but also ensure that the through hole 17 and the moving rod 21 are coaxial.

[0040] Furthermore, in an embodiment of the present invention, the diameter of the connecting portion 212 is equal to or greater than the diameter of the through hole 17 .

[0041] It can be understood that the connection part 212 is used to be fixedly connected to the movable iron core 22, and the electromagnetic lock 100 generates electromagnetic force through the electromagnetic device 1, and the electromagnetic force acts on the movable iron core 22, so that the movable iron core 22 drives the moving rod 21 to move axially, so the movable iron core 22 needs to maintain a certain strength. The diameter of the connection part 212 is equal to or greater than the diameter of the through hole 17 to ensure that the moving rod 21 has a certain strength and is not easy to break.

[0042] Furthermore, in one embodiment of the utility model, the electromagnetic device 1 includes a yoke 11 and a coil 12 arranged inside the yoke 11. The yoke 11 has fixing holes at both ends along the axial direction, a fixing core 14 is arranged in the fixing hole, and the fixing core 14 has a through hole 17 along the axial direction.

[0043] It can be understood that the coil 12 is an element for converting electrical energy and magnetic energy. It is composed of a metal wire, such as a copper wire winding, and in most cases forms a cylindrical shape, but it can also be other shapes. When current passes through the coil 12, a magnetic field will be formed in the coil 12, and then the coil 12 can convert electrical energy and magnetic energy. The yoke 11 is a component on the electromagnetic device 1 used to enhance the attraction of the coil 12, which encloses the magnetic lines of force generated by the coil 12 inside, thereby improving the efficiency of the electromagnet. The coil 12 is arranged inside the yoke 11, and the yoke 11 is provided with fixing holes at both ends along the axial direction, and a fixed iron core 14 is provided in the fixing hole. The fixed iron core 14 is provided with a through hole 17 along the axial direction, and the two ends of the moving rod 21 are respectively passed through the through hole 17 inside the fixed iron core 14, so as to realize the positioning of the moving device 2 and ensure that the moving device 2 moves axially.

[0044] Furthermore, the electromagnetic device 1 further comprises a bobbin 15 , the coil 12 is wound around the bobbin 15 , a moving cavity 16 is formed inside the bobbin 15 , and a magnetic block 13 is circumferentially arranged on the outer surface of the middle portion of the bobbin 15 .

[0045] It can be understood that by arranging the magnetic block 13 on the outer surface of the middle part of the bobbin 15, it is possible to generate a stronger magnetic force when the same current passes through the coil 12.

[0046] Further, the avoidance portion 211 includes a first avoidance section 2111 and a second avoidance section 2112, and the first avoidance section 2111 and the second avoidance section 2112 are respectively arranged at two ends of the connection portion 212; the two ends of the mobile rod 21 away from the connection portion 212 are also provided with an extension portion 213, and the extension portion 213 includes a first extension section 2131 and a second extension section 2132, and the first extension section 2131 is connected to the first avoidance section 2111, and the second extension section 2132 is connected to the second avoidance section 2112. Optionally, the mobile device 2 further includes a pressing device 23, and the pressing device 23 is arranged on at least one of the first extension section 2131 and the second extension section 2132.

[0047] It is understandable that by arranging the pressing device 23 on at least one of the first extension section 2131 and the second extension section 2132, the movement of the moving rod 21 drives the movement of the pressing device 23, thereby realizing the pressing triggering of other switch components. Preferably, the pressing device 23 is an electromagnetic bead; and / or the moving rod 21 is a tin bar.

[0048] The embodiment of the present invention further provides a charging gun, which includes a charging gun head and the above electromagnetic lock 100, and the electromagnetic lock 100 is arranged inside the charging gun head. Since the electromagnetic lock 100 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0049] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electromagnetic lock (100), comprising an electromagnetic device (1) and a moving device (2), characterized in that: The electromagnetic device (1) is provided with a moving cavity (16) along its axial direction, and the electromagnetic device (1) is provided with through holes (17) communicating with the moving cavity (16) at both ends along its axial direction, and the two ends of the moving device (2) respectively pass through the through holes (17), and the moving device (2) moves along the axial direction under the action of the electromagnetic force of the electromagnetic device (1); The moving device (2) is provided with a clearance portion (211), and an annular gap is provided between the clearance portion (211) and the through hole (17), so that the clearance portion (211) does not contact the wall of the through hole (17) when moving in the axial direction.

2. The electromagnetic lock (100) according to claim 1, characterized in that: The moving device (2) comprises a moving rod (21) and a movable iron core (22); the moving rod (21) is provided with a connecting portion (212) and a clearance portion (211) adjacent to the connecting portion (212); the movable iron core (22) is fixedly connected to the connecting portion (212); the movable iron core (22) is accommodated in the moving cavity (16); and the movable iron core (22) drives the moving rod (21) to move axially under the action of the electromagnetic force of the electromagnetic device (1).

3. An electromagnetic lock (100) as claimed in claim 2, characterized in that: The distance between the air-avoiding portion (211) and the wall of the through hole (17) is 0.2 mm.

4. An electromagnetic lock (100) as claimed in claim 3, characterized in that: The diameter of the connecting portion (212) is equal to or greater than the diameter of the through hole (17).

5. An electromagnetic lock (100) according to any one of claims 2 to 4, characterized in that: The electromagnetic device (1) comprises a yoke (11) and a coil (12) arranged inside the yoke (11); the yoke (11) is provided with fixing holes at both ends along the axial direction; a fixing iron core (14) is arranged in the fixing hole; and the fixing iron core (14) is provided with a through hole (17) along the axial direction.

6. An electromagnetic lock (100) as claimed in claim 5, characterized in that: The electromagnetic device (1) further comprises a bobbin (15), the coil (12) being wound around the outside of the bobbin (15), the moving cavity (16) being formed inside the bobbin (15), and a magnetic block (13) being provided on the outer surface of the middle portion of the bobbin (15) along the circumferential direction.

7. An electromagnetic lock (100) as claimed in claim 6, characterized in that: The avoidance portion (211) comprises a first avoidance section (2111) and a second avoidance section (2112), wherein the first avoidance section (2111) and the second avoidance section (2112) are respectively arranged at two ends of the connecting portion (212); The two ends of the moving rod (21) away from the connecting portion (212) are also provided with extending portions (213), and the extending portions (213) include a first extending section (2131) and a second extending section (2132), the first extending section (2131) is connected to the first avoiding section (2111), and the second extending section (2132) is connected to the second avoiding section (2112).

8. An electromagnetic lock (100) as claimed in claim 7, characterized in that: The moving device (2) further comprises a pressing device (23), wherein the pressing device (23) is arranged on at least one of the first extending section (2131) and the second extending section (2132).

9. An electromagnetic lock (100) as claimed in claim 8, characterized in that: The pressing device (23) is an electromagnetic bead; And / or, the moving rod (21) is a tinplate bar.

10. A charging gun, characterized in that: The charging gun comprises: A charging gun head and an electromagnetic lock (100) as claimed in any one of claims 1 to 9 arranged inside the charging gun head.

Images