Magnetic control holding relay

Abstract

The utility model discloses a magnetic control holding relay, which relates to the technical field of electric power equipment and comprises a shell assembly, a first coil, a second coil, a permanent magnet and a magnetomotive assembly. The shell assembly has an accommodating cavity; the first coil is arranged in the accommodating cavity; the second coil is arranged in the accommodating cavity, and the second coil and the first coil are coaxial; the permanent magnet is arranged between the first coil and the second coil; the magnetomotive assembly penetrates through the first coil, the permanent magnet and the second coil, and the magnetomotive assembly can move in the first direction in the axial direction of the first coil or move in the second direction opposite to the first direction. According to the magnetic control holding relay, a spring mechanism is not needed for resetting, the service life of the relay is long, and the reliability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment technical field, especially a magnetic control keeps relay. BACKGROUND

[0002] In the currently used relay, spring mechanism is used to reset the contact. The relay has a closed state and an open state. The principle of the relay is that the coil is energized, the magnetic field generated by the coil attracts the magnetic moving assembly to move to the first position to close the relay, and the magnetic moving assembly needs to overcome the resistance of the spring mechanism during the movement. After the coil is de-energized, the magnetic moving assembly is pushed back to the second position to open the relay by the reset of the spring mechanism. The spring mechanism is repeatedly operated, which is easy to cause mechanical fatigue and lead to failure of the spring mechanism, and finally the relay cannot be opened.

[0003] In actual application, the conventional relay needs to be maintained after being closed and opened for thousands of times, and about 70.3% of the failures are caused by the failure of the spring mechanism. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving one of the technical problems in the prior art. Therefore, the utility model provides a magnetic control relay, which does not need to use the spring mechanism for reset, has a long service life, and has higher reliability.

[0005] The magnetic control relay according to the utility model embodiment comprises a housing assembly, the housing assembly has a containing cavity, a first coil, the first coil is arranged in the containing cavity, a second coil, the second coil is arranged in the containing cavity, and the second coil is coaxial with the first coil, a permanent magnet, the permanent magnet is arranged between the first coil and the second coil, and a magnetic moving assembly, the magnetic moving assembly passes through the first coil, the permanent magnet and the second coil, and the magnetic moving assembly can move in the first direction along the axial direction of the first coil or in the second direction opposite to the first direction.

[0006] The first coil, the second coil and the permanent magnet are arranged in the containing cavity of the housing assembly.

[0007] The first coil, the second coil and the permanent magnet are arranged in the containing cavity of the housing assembly.

[0008] The first coil, the second coil and the permanent magnet are arranged in the containing cavity of the housing assembly.

[0009] The first coil, the second coil and the permanent magnet are arranged in the containing cavity of the housing assembly.

[0010] The magnetic control holding relay has at least the following beneficial effects: when the first coil is powered, the magnetic moving assembly moves towards a first direction, at this time, the magnetic moving assembly can be configured to move to a closed state, when the magnetic moving assembly is in the closed state, the first coil can be powered off, and the magnetic moving assembly stays under the action of the permanent magnet; when the second coil is powered, the magnetic moving assembly moves towards a second direction, at this time, the magnetic moving assembly can be configured to move to an open state, when the magnetic moving assembly is in the open state, the second coil can be powered off, and the magnetic moving assembly also stays under the action of the permanent magnet; by powering on and off the first coil and the second coil, the state of the relay can be changed by controlling the movement of the magnetic moving assembly, the spring mechanism does not need to be used to reset the magnetic moving assembly, the service life of the relay is long, and the reliability is higher.

[0011] According to some embodiments of the utility model, the magnetic moving assembly includes a guide rod and an armature, the armature is sleeved on the guide rod, the armature is fixed with the guide rod, and the armature can pass through the first coil, the permanent magnet and the second coil.

[0012] According to some embodiments of the utility model, the armature is a columnar structure, and a cavity is arranged in the armature.

[0013] According to some embodiments of the utility model, the armature includes a first armature block and a second armature block, the first armature block and the second armature block are both sleeved on the guide rod, the guide rod is provided with a connecting assembly, and the connecting assembly splices the first armature block and the second armature block into the armature and fixes the armature on the guide rod.

[0014] According to some embodiments of the utility model, the guide rod is provided with a shoulder and a threaded segment, the first armature block and the second armature block are arranged between the shoulder and the threaded segment, the first armature block abuts against the shoulder, the second armature block is spliced with the first armature block, and the threaded segment is provided with a locking nut abutting against the second armature block.

[0015] According to some embodiments of the utility model, a butt joint surface between the first armature block and the second armature block is provided with a positioning structure, and the positioning structure can keep the first armature block and the second armature block in relative static state in the radial direction of the guide rod.

[0016] According to some embodiments of the utility model, the first armature block is provided with an annular groove, the second armature block is provided with a boss, and the boss is inserted into the annular groove.

[0017] According to some embodiments of the utility model, the shell assembly includes a cylinder, a first cover plate and a second cover plate, the first cover plate is covered on one end of the cylinder, the second cover plate is covered on the other end of the cylinder, the cylinder, the first cover plate and the second cover plate enclose the containing cavity, the first coil, the permanent magnet and the second coil are fixed in turn on the inside of the cylinder, the guide rod penetrates the first cover plate and the second cover plate, the guide rod moves along the first direction, the armature can contact the first cover plate, the guide rod moves along the second direction, the armature can contact the second cover plate.

[0018] According to some embodiments of the utility model, the second cover plate is equipped with adjusting assembly, adjusting assembly is connected with adjusting block, adjusting block is located between the armature and the second cover plate, adjusting assembly can change the distance between adjusting block and the second cover plate.

[0019] According to some embodiments of the utility model, adjusting assembly includes bolt, adjusting block is equipped with threaded hole, bolt passes through the second cover plate and is screwed into the threaded hole, bolt is connected with the second cover plate, in the axial direction of bolt, bolt keeps relative static with the second cover plate.

[0020] The additional aspects and advantages of the utility model will be partly given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further explained in combination with the drawings and examples, wherein:

[0022] Figure 1 It is structure schematic drawing of the utility model embodiment magnetic control keeps relay in closing;

[0023] Figure 2 It is structure schematic drawing of the utility model embodiment magnetic control keeps relay in opening;

[0024] Figure 3 It is structure schematic drawing of the utility model embodiment magnetic dynamic subassembly.

[0025] Reference numerals:

[0026] The housing assembly 100, the barrel 110, the first cover plate 120, the second cover plate 130, the first coil 200, the second coil 300, the permanent magnet 400, the magnetic moving assembly 500, the guide rod 510, the armature 520, the first armature block 521, the second armature block 522, the connecting assembly 530, the shoulder 531, the threaded section 532, the locking nut 533, the positioning structure 540, the annular groove 541, the boss 542, the adjusting assembly 600, the adjusting block 610, the bolt 620. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0028] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application, which indicates or implies that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In the description of the present application, the plural means more than two. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0030] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0031] As described in the background, taking a relay as an example, when the relay is in a closed state, the coil is powered on to attract the magnetic moving assembly, and the magnetic moving assembly compresses the spring mechanism. After the coil is powered off, the magnetic moving assembly loses the attraction force, and the spring mechanism resets the magnetic moving assembly to the open state. The spring mechanism is compressed and reset once every time the relay is closed and opened. After the relay is used for a long time, the number of actions of the spring mechanism accumulates, and finally the spring force of the spring mechanism decreases due to mechanical fatigue. When the spring force of the spring mechanism decreases to a certain critical value, the spring mechanism will not be able to reset the magnetic moving assembly, and the relay will fail. Therefore, the relay using the spring mechanism needs frequent maintenance and repair to ensure the stable operation of the circuit.

[0032] Referring to Figure 1 An embodiment of the utility model discloses a magnetic control holding relay, including shell subassembly 100, first coil 200, second coil 300, permanent magnet 400 and magnetic moving subassembly 500.

[0033] Shell subassembly 100 has accommodating cavity, and first coil 200 is arranged in the accommodating cavity, and second coil 300 is also arranged in the accommodating cavity, and second coil 300 is coaxial with first coil 200, and permanent magnet 400 is arranged between first coil 200 and second coil 300, and magnetic moving subassembly 500 passes through first coil 200, permanent magnet 400 and second coil 300, and magnetic moving subassembly 500 can move along the axial direction of first coil 200 towards first direction or second direction opposite to first direction.

[0034] In some embodiments, define first direction as the direction of second coil 300 towards first coil 200, then second direction is the direction of first coil 200 towards second coil 300, and simultaneously, magnetic moving subassembly 500 is configured to move towards first direction can realize closing, and move towards second direction can realize opening.

[0035] When first coil 200 is powered, first coil 200 generates magnetic field, and magnetic moving subassembly 500 is attracted towards first direction, i.e. magnetic moving subassembly 500 is attracted by first coil 200. Figure 1 Or Figure 2 In the structure shown, first coil 200 is located at the left side, so magnetic moving subassembly 500 moves towards the left side, the air gap at the right side gradually increases, the air gap at the left side gradually decreases, the magnetic circuit of first coil 200 gradually moves from the right part to the left part, and magnetic moving subassembly 500 accelerates to move to the left, i.e. magnetic moving subassembly 500 moves towards first direction until closing. After magnetic moving subassembly 500 is in the closing state or position, first coil 200 can be powered off, and at this time, magnetic moving subassembly 500 can be kept stationary under the action of permanent magnet 400.

[0036] When second coil 300 is powered, second coil 300 generates magnetic field, and magnetic moving subassembly 500 is attracted towards second direction, i.e. magnetic moving subassembly 500 is attracted by second coil 300. Similarly, in the structure shown, second coil 300 is located at the right side, so magnetic moving subassembly 500 moves towards the right side, the air gap at the left side gradually increases, the air gap at the right side gradually decreases, the magnetic circuit of second coil 300 gradually moves from the left part to the right part, and magnetic moving subassembly 500 accelerates to move to the right, i.e. magnetic moving subassembly 500 moves towards second direction until opening. After magnetic moving subassembly 500 is in the opening state or position, second coil 300 can be powered off, and at this time, magnetic moving subassembly 500 can also be kept stationary under the action of permanent magnet 400.

[0037] It should be understood that the first coil 200 and the second coil 300 are not energized at the same time. When the first coil 200 is energized, the second coil 300 is in a de-energized state; when the second coil 300 is energized, the first coil 200 is in a de-energized state. The magnetic fields generated by the first coil 200 and the second coil 300 are also in opposite directions.

[0038] The housing assembly 100 is used to protect the first coil 200, the permanent magnet 400, and the second coil 300.

[0039] Referring to Figure 3 It can be understood that the magnetic moving assembly 500 includes a guide rod 510 and an armature 520, the armature 520 is sleeved on the guide rod 510, the armature 520 is fixed with the guide rod 510, and the armature 520 can pass through the first coil 200, the permanent magnet 400 and the second coil 300.

[0040] When the first coil 200 is energized, the armature 520 can be attracted to move towards the first direction, and when the second coil 300 is energized, the armature 520 can be attracted to move towards the second direction. The armature 520 is fixed with the guide rod 510, and the armature 520 moves synchronously to drive the guide rod 510 to move, so that a contact or the like structure can be arranged at the end of the guide rod 510, and the contact at the end of the guide rod 510 is a moving contact. Correspondingly, there is also a static contact, and the moving contact moves together with the guide rod 510 when the guide rod 510 moves, and the moving path of the moving contact covers the static contact. When the moving contact contacts the static contact, the switch is closed, and when the moving contact is separated from the static contact, the switch is opened. Of course, the closing and opening of the circuit can also be realized by other structures that can be turned on and off, rather than specifically the moving contact and the static contact.

[0041] It can be understood that the armature 520 is a columnar structure, and the armature 520 has a cavity inside.

[0042] When the profile of the armature 520 and the size of the space occupied by the armature 520 do not change, the magnetic flux of the magnetic field generated by the first coil 200 passing through the armature 520 does not change, and the magnetic flux of the magnetic field generated by the second coil 300 passing through the armature 520 does not change. Therefore, a cavity can be arranged inside the armature 520 to reduce the mass of the armature 520. Under the condition that the attraction of the first coil 200 to the armature 520 is basically unchanged, the armature 520 with smaller mass has faster reaction speed. Similarly, the attraction of the second coil 300 to the armature 520 with the cavity is also basically unchanged.

[0043] It should be understood that after the mass of the armature 520 is reduced, its inertia is also reduced. When the first coil 200 attracts the armature 520 to move to the closed position, the impact force acting on the armature 520 during the process from motion to stop is also reduced.

[0044] Referring to Figure 3As shown, it can be understood that the armature 520 includes a first armature block 521 and a second armature block 522, both of which are sleeved on the guide rod 510, and the guide rod 510 is provided with a connecting assembly 530 which splices the first armature block 521 and the second armature block 522 into the armature 520 and is fixed to the guide rod 510.

[0045] In order to facilitate the machining of the cavity in the armature 520, the armature 520 can be designed to have two parts of the first armature block 521 and the second armature block 522. By sleeving both the first armature block 521 and the second armature block 522 on the guide rod 510, the first armature block 521 and the second armature block 522 can be spliced into the armature 520 with a cavity by using the connecting assembly 530.

[0046] It can be understood that the guide rod 510 is provided with a shoulder 531 and a threaded segment 532, the first armature block 521 and the second armature block 522 are arranged between the shoulder 531 and the threaded segment 532, the first armature block 521 abuts against the shoulder 531, the second armature block 522 is spliced with the first armature block 521, and the threaded segment 532 is provided with a locking nut 533 which abuts against the second armature block 522.

[0047] The locking nut 533 is rotatable on the threaded segment 532 and can be moved towards the direction of the shoulder 531 to clamp the first armature block 521 and the second armature block 522 between the shoulder 531 and the locking nut 533. It needs to be understood that the diameter of the shoulder 531 is larger than that of the guide rod 510, so the first armature block 521 can abut against the end face of the shoulder 531.

[0048] It can be understood that the abutting surface between the first armature block 521 and the second armature block 522 is provided with a positioning structure 540 which can keep the first armature block 521 and the second armature block 522 in relative static state in the radial direction of the guide rod 510.

[0049] The positioning structure 540 is used for splicing positioning of the first armature block 521 and the second armature block 522 to avoid the misalignment of the first armature block 521 and the second armature block 522 in the radial direction to cause magnetic leakage.

[0050] Specifically, it can be understood that the first armature block 521 is provided with an annular groove 541, the second armature block 522 is provided with a boss 542, and the boss 542 is inserted into the annular groove 541. The annular groove 541 limits the radial movement of the boss 542 to keep the first armature block 521 and the second armature block 522 in relative static state in the radial direction.

[0051] Referring to Figure 2As shown, it can be understood that the shell assembly 100 comprises a barrel 110, a first cover plate 120 and a second cover plate 130, the first cover plate 120 is covered on one end of the barrel 110, and the second cover plate 130 is covered on the other end of the barrel 110, the barrel 110, the first cover plate 120 and the second cover plate 130 enclose a containing cavity, the first coil 200, the permanent magnet 400 and the second coil 300 are fixed in sequence on the inner side of the barrel 110, the guide rod 510 penetrates the first cover plate 120 and the second cover plate 130, the guide rod 510 moves along the first direction, the armature 520 can contact the first cover plate 120, the guide rod 510 moves along the second direction, and the armature 520 can contact the second cover plate 130.

[0052] Taking the moving contact as an example, the moving contact is arranged at the end of the guide rod 510, which can be the end of the guide rod 510 extending out of the first cover plate 120, or the end of the guide rod 510 extending out of the second cover plate 130. When the moving contact is arranged at the end of the guide rod 510 extending out of the first cover plate 120, the end of the guide rod 510 can be provided with threads for threaded connection with the structure having the moving contact. For example, a metal plate having a contact is arranged at the end of the guide rod 510, and the metal plate is fixed at the end of the guide rod 510 by screwing the nut with the threads of the guide rod 510.

[0053] It should be understood that when the guide rod 510 and the armature 520 move, the armature 520 can contact the first cover plate 120 to limit the stroke of the magnetic moving assembly 500 moving in the first direction; the armature 520 can contact the second cover plate 130 to limit the stroke of the magnetic moving assembly 500 moving in the second direction.

[0054] Taking the moving contact arranged on the left side of the guide rod 510, i.e. the moving contact located on the end of the guide rod 510 extending out of the first cover plate 120, and the stationary contact also located on the left side of the moving contact as an example. The guide rod 510 moves towards the first direction, i.e. the guide rod 510 moves towards the left side, the moving contact can contact the stationary contact to complete the closing, and in the optimal structure, after the moving contact contacts the stationary contact, the armature 520 just contacts the first cover plate 120. When the guide rod 510 moves towards the right side, the armature 520 contacts the second cover plate 130, and at this time the opening is completed.

[0055] Referring to Figure 1 As shown, it can be understood that the second cover plate 130 is provided with an adjusting assembly 600, the adjusting assembly 600 is connected with an adjusting block 610, the adjusting block 610 is located between the armature 520 and the second cover plate 130, and the adjusting assembly 600 can change the distance between the adjusting block 610 and the second cover plate 130.

[0056] After the adjusting block 610 is arranged, the armature 520 is no longer in contact with the second cover plate 130, but in contact with the adjusting block 610. When the armature 520 is in contact with the adjusting block 610, it is in the open state. The adjusting assembly 600 is used to change the distance between the adjusting block 610 and the second cover plate 130. When the distance between the adjusting block 610 and the second cover plate 130 increases, the distance between the adjusting block 610 and the armature 520 will be shortened, that is, the armature 520 moves towards the second direction and contacts the adjusting block 610 more quickly. Conversely, when the armature 520 moves towards the first direction, the distance between them is also shortened, that is, the armature 520 can quickly change from the open state to the closed state. Therefore, the adjusting assembly 600 changes the distance between the adjusting block 610 and the second cover plate 130, so as to adjust the closing and opening reaction speed of the relay.

[0057] It can be understood that the adjusting assembly 600 comprises a bolt 620, the adjusting block 610 is provided with a threaded hole, the bolt 620 passes through the second cover plate 130 and is screwed into the threaded hole, the bolt 620 is connected with the second cover plate 130, and the bolt 620 and the second cover plate 130 are relatively stationary in the axial direction of the bolt 620.

[0058] When the bolt 620 is screwed, the bolt 620 moves in cooperation with the threaded hole, and the bolt 620 is relatively stationary in the axial direction of the second cover plate 130, so that the adjusting block 610 will be displaced relative to the second cover plate 130, that is, the above structure can change the distance between the adjusting block 610 and the second cover plate 130.

[0059] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model.

Claims

1. A magnetically latched relay, characterized by The application relates to a magnetic drive assembly. The application comprises: a housing assembly (100) having a containing cavity; a first coil (200) arranged in the containing cavity; a second coil (300) arranged in the containing cavity, and the second coil (300) is coaxial with the first coil (200); a permanent magnet (400) arranged between the first coil (200) and the second coil (300); 2. The magnetically biased latching relay of claim 1, wherein, a magnetic drive assembly (500) passing through the first coil (200), the permanent magnet (400) and the second coil (300), and the magnetic drive assembly (500) can move along the axial direction of the first coil (200) in a first direction or a second direction opposite to the first direction.

3. The magnetically biased latching relay of claim 2, wherein, The magnetic drive assembly (500) comprises a guide rod (510) and an armature (520), the armature (520) is sleeved on the guide rod (510), the armature (520) is fixed with the guide rod (510), and the armature (520) can pass through the first coil (200), the permanent magnet (400) and the second coil (300).

4. The magnetically biased latching relay of claim 3, wherein, The armature (520) is a columnar structure, and a cavity is arranged in the armature (520).

5. The magnetically biased latching relay of claim 4, wherein, The armature (520) comprises a first armature block (521) and a second armature block (522), the first armature block (521) and the second armature block (522) are sleeved on the guide rod (510), the guide rod (510) is provided with a connecting assembly (530), the connecting assembly (530) combines the first armature block (521) and the second armature block (522) into the armature (520) and is fixed on the guide rod (510).

6. The magnetically biased hold-in relay of claim 4, wherein, The guide rod (510) is provided with a shoulder (531) and a threaded segment (532), the first armature block (521) and the second armature block (522) are arranged between the shoulder (531) and the threaded segment (532), the first armature block (521) abuts against the shoulder (531), the second armature block (522) is combined with the first armature block (521), and the threaded segment (532) is provided with a locking nut (533) abutting against the second armature block (522).

7. The magnetically biased hold-in relay of claim 6, wherein A positioning structure (540) is arranged on the abutting surface between the first armature block (521) and the second armature block (522), and the positioning structure (540) can keep the first armature block (521) and the second armature block (522) in relative static state in the radial direction of the guide rod (510). The first armature block (521) is provided with an annular groove (541), and the second armature block (522) is provided with a boss (542), and the boss (542) is inserted into the annular groove (541).

8. The magnetically biased hold-in relay of claim 2, wherein, The shell assembly (100) comprises a cylinder (110), a first cover plate (120) and a second cover plate (130), the first cover plate (120) is arranged on one end of the cylinder (110), the second cover plate (130) is arranged on the other end of the cylinder (110), the cylinder (110), the first cover plate (120) and the second cover plate (130) surround the accommodating cavity, the first coil (200), the permanent magnet (400) and the second coil (300) are fixed in sequence on the inner side of the cylinder (110), the guide rod (510) penetrates the first cover plate (120) and the second cover plate (130), the guide rod (510) moves along the first direction, the armature (520) can contact the first cover plate (120), the guide rod (510) moves along the second direction, the armature (520) can contact the second cover plate (130).

9. The magnetically biased latching relay of claim 8, wherein, The second cover plate (130) is provided with an adjusting assembly (600), the adjusting assembly (600) is connected with an adjusting block (610), the adjusting block (610) is located between the armature (520) and the second cover plate (130), and the adjusting assembly (600) can change the distance between the adjusting block (610) and the second cover plate (130).

10. The magnetically biased latching relay of claim 9, wherein, The adjusting assembly (600) comprises a bolt (620), the adjusting block (610) is provided with a threaded hole, the bolt (620) penetrates the second cover plate (130) and is screwed into the threaded hole, the bolt (620) is connected with the second cover plate (130), and the bolt (620) and the second cover plate (130) remain relatively stationary in the axial direction of the bolt (620).

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