Anti-jamming structure for push rod, and switching electrical device

Abstract

An anti-jamming structure for a push rod, and a switching electrical device. The anti-jamming structure for a push rod is used for a switching electrical device, and the switching electrical device comprises a partition plate (10), wherein a push rod (6) movably penetrates the partition plate (10). The anti-jamming structure for the push rod comprises a sealing gasket (15), which can be arranged on the partition plate, wherein the sealing gasket (15) is provided with a through hole for allowing the push rod (6) to pass therethrough; the push rod (6) is in interference fit with the through hole; and the sealing gasket (15) is configured in such a way that an inner ring part thereof in contact with at least the push rod (6) is made of a flexible material, such that the sealing gasket (15) can deform with the movement of the push rod (6). When the push rod (6) moves, an inner ring of the sealing gasket (15) always fits to the outer surface of the push rod (6), thereby achieving the effect of preventing foreign matter from passing through a gap between the push rod (6) and the partition plate (10), and preventing the switching electrical device from being damaged due to the foreign matter entering an inner space.

Description

Push rod anti-stuck structure and switch electrical appliances

[0001] This disclosure claims priority to Chinese patent applications with application numbers 2024202878908, filed on February 7, 2024, and 2024205589007, filed on March 21, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of switch electrical appliances, and in particular to a push rod anti-stuck structure and a switch electrical appliance having the push rod anti-stuck structure. Background Art

[0003] A contactor is a highly versatile switching device that can frequently connect and disconnect main circuits and enable remote control. It is widely used in circuit control technology. A contactor generally consists of a control system, a contact system, a motion mechanism, and a sealing system. The motion mechanism typically includes an electromagnet. When power is supplied to the electromagnet's coil, the coil generates a magnetic field, which attracts the movable core, causing it to move upward. This forces the reaction spring to compress, generating a reaction force. When the movable contact bridge contacts the fixed contact, the contact spring also compresses, generating a reaction force. When the movable core contacts the stationary core, movement ceases, the movable contact bridge and the fixed contact establish reliable contact, and conduction is established between the two fixed contacts, energizing the controlled external circuit. When power is removed from the coil, the attractive force disappears, and the contact spring and reaction spring simultaneously act to move the movable core downward. When the movable contact bridge separates from the fixed contact, the reaction force of the contact spring disappears, but the reaction spring continues to provide a reaction force, causing the movable core to move downward until the push rod seat contacts the stationary core, at which point the movable core returns to its original position and the controlled external circuit is completely disconnected.

[0004] In existing contactors, the arc-extinguishing chamber housing the contact system communicates with the actuating chamber housing magnetic circuit mechanisms such as electromagnets. Specifically, the partition between the arc-extinguishing and actuating chambers is spaced apart by a gap between the movable and fixed contacts. During frequent connection and disconnection of the main circuit, foreign matter generated by arcing between the movable and fixed contacts in the arc-extinguishing chamber can easily fall into the magnetic circuit mechanism through the gap between the partition and the movable iron core, causing the movable iron core to become stuck and fail, affecting normal contactor actuation and leading to undesirable risks. Summary of the Invention

[0005] To this end, in order to address at least one of the above problems, the present disclosure provides a push rod anti-stuck structure and a switch electrical appliance having the push rod anti-stuck structure.

[0006] This disclosure is implemented using the following scheme:

[0007] The present disclosure proposes a push rod anti-stuck structure for switching electrical appliances; the switching electrical appliance includes a partition, and the push rod is movably inserted into the partition. The push rod anti-stuck structure includes a sealing gasket that can be set on the partition, and the sealing gasket is provided with a through hole for the push rod to pass through. The push rod is interference fit with the through hole, and the sealing gasket is configured to have at least an inner ring portion that contacts the push rod as a flexible material, so that the sealing gasket can be deformed with the movement of the push rod.

[0008] The present disclosure proposes a push rod anti-stuck structure, wherein the push rod is used to actuate the contact system of a switching electrical appliance; a first space and a second space are provided in the switching electrical appliance, and the switching electrical appliance is further provided with a partition plate serving as a partition structure for separating the first space and the second space in the switching electrical appliance, and the push rod is movably passed through the partition plate, wherein the push rod anti-stuck structure includes a sealing gasket provided on the partition plate, the sealing gasket is provided with a through hole for the push rod to pass through, the through hole is interference fit with the push rod, and the sealing gasket is configured so that at least the inner ring portion thereof is made of a flexible material, so that the sealing gasket can be deformed with the movement of the push rod.

[0009] In one embodiment, the push rod anti-stuck structure includes two or more layers of sealing gaskets.

[0010] In one embodiment, the push rod anti-stuck structure further includes an inner gasket provided on the partition plate, the inner gasket is provided with a through hole for the push rod to pass through, and the push rod is gap-fitted with the through hole of the inner gasket.

[0011] In one embodiment, the sealing gasket is a single layer, and the inner gasket is arranged between the sealing gasket and the partition; or the sealing gasket is a two-layer, and the inner gasket is arranged between the two layers of the sealing gasket.

[0012] In one embodiment, the push rod anti-stuck structure also includes an outer gasket, which is provided with a through hole for the push rod to pass through, and the push rod is loosely matched with the through hole of the outer gasket. The outer gasket can be installed on the partition, thereby installing the sealing gasket between the outer gasket and the partition.

[0013] In one embodiment, the outer gasket and / or the partition is provided with a receiving groove, and the receiving groove is used to receive the sealing gasket.

[0014] In one embodiment, the sealing gasket is entirely made of flexible material.

[0015] In one embodiment, the sealing gasket is a polyester film material.

[0016] The present disclosure also provides a switch electrical appliance, comprising the push rod anti-stuck structure described in the present disclosure.

[0017] The present disclosure also proposes a switching electrical appliance, which is provided with a first space and a second space. The switching electrical appliance is also provided with a partition as a partition structure between the first space and the second space in the switching electrical appliance and a push rod. The push rod is movably inserted into the partition, and the push rod anti-stuck structure described in the present disclosure is provided between the partition and the push rod.

[0018] In one embodiment, the switching device is a contactor.

[0019] The technical solution provided by this disclosure has the following technical effects:

[0020] 1. The present disclosure provides a push rod anti-jamming structure, which includes a sealing gasket arranged on a partition, wherein the push rod is movably inserted into the partition, and the sealing gasket is provided with a through hole for the push rod to pass through, and the push rod is interference fit with the through hole, and the sealing gasket is configured to have at least an inner ring portion thereof made of a flexible material. In this way, during the movement of the push rod, the inner ring of the sealing gasket always fits the outer surface of the push rod, thereby preventing foreign matter from passing through the gap between the push rod and the partition, and preventing foreign matter from entering the internal space and causing damage to the switch electrical appliance.

[0021] 2. The push rod anti-stuck structure includes two layers of sealing gaskets. The sealing gaskets can be deformed with the movement of the push rod, and have better sealing performance for the gap between the push rod and the partition.

[0022] 3. The push rod anti-stuck structure also includes an inner gasket arranged between the two layers of the sealing gaskets, thereby providing deformation space for the sealing gasket to deform with the movement of the push rod, making the deformation of the sealing gasket easier and improving the sealing performance of the gap between the push rod and the partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a cross-sectional view of a contactor according to the present disclosure;

[0024] FIG2 is a top view of the contactor of the present disclosure;

[0025] Figure 3 is an enlarged view of point A in Figure 1;

[0026] Figure 4 is an enlarged view of point B in Figure 3;

[0027] FIG5 is an enlarged view of point B in FIG3 when the contactor is in a non-energized state;

[0028] FIG6 is an enlarged view of point B in FIG3 when the contactor is in an energized state. DETAILED DESCRIPTION

[0029] To further illustrate various embodiments, the present disclosure is accompanied by accompanying drawings. These drawings form part of the disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of the present disclosure. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0030] The present disclosure will now be further described with reference to the accompanying drawings and specific embodiments.

[0031] As shown in Figure 1, this embodiment provides a contactor 1 comprising a hollow housing 2 with a partition 10 disposed within the housing 2, thereby forming a first space 21 and a second space 22 within the housing 2. In this embodiment, the first space 21 is an arc-extinguishing chamber for housing the contact system 3; the second space 22 is an actuating chamber for housing the magnetic circuit system 4. A push rod 6 is movably disposed through the partition 10.

[0032] As shown in Figures 1 and 2, the magnetic circuit system 4 is used to actuate the push rod 6 to generate movement. The contact system 3 includes two fixed contacts and a movable contact 7, which are provided on the housing 2. The two fixed contacts are hereinafter referred to as the first fixed contact 11 and the second fixed contact 12. The push rod 6 is in transmission connection with the movable contact 7. When the magnetic circuit system 4 is excited, it generates magnetic force, which actuates the push rod 6 to generate movement. The push rod 6 drives the movable contact 7 into contact with the first and second fixed contacts 11, 12, thereby establishing electrical conduction between the first and second fixed contacts 11, 12 and thus energizing the controlled external circuit. The push rod 6 is connected to a return spring 8. When the magnetic circuit system 4 is in a de-energized state, no magnetic force is generated within the magnetic circuit system 4. The push rod 6 returns to its initial position due to the action of the return spring 8, disconnecting the movable contact 7 from both the first and second fixed contacts 11, 12. The first and second fixed contacts 11, 12 are disconnected, and the controlled external circuit is disconnected.

[0033] As shown in FIG. 2 , the contactor 1 is further provided with a control connector 13 for inputting or disconnecting an excitation signal to the magnetic circuit system 4 .

[0034] Since the existing contact system frequently connects and disconnects the main circuit, foreign matter generated by arcing in the moving contact and the fixed contact in the first space 21, i.e., the arc extinguishing chamber, can easily fall into the magnetic circuit system 4 through the gap between the partition 10 and the push rod 6, causing the push rod 6 to become stuck and fail, which will affect the normal actuation of the contactor 1.

[0035] Based on this, in this embodiment, a push rod anti-stuck structure is provided between the push rod 6 and the partition plate 10 .

[0036] As shown in Figures 3 and 4, the push rod anti-stuck structure is installed on the partition 10, and the push rod anti-stuck structure includes an outer gasket 14, an inner gasket 16 and a sealing gasket 15. As shown in Figure 4, two layers of sealing gaskets 15 are provided, and the inner gasket 16 is provided between the two layers of sealing gaskets 15. The outer gasket 14 is provided at the outermost layer, so that the two layers of sealing gaskets 15 and the inner gasket 16 are located between the outer gasket 14 and the partition 10. The outer gasket 14, the inner gasket 16 and the sealing gasket 15 are all provided with through holes for the push rod 6 to pass through, and the through holes for the push rod 6 to pass through the outer gasket 14 and the inner gasket 16 are clearance-fitted with the push rod 6, and the through hole for the push rod 6 to pass through the sealing gasket 15 is interference-fitted with the push rod 6. The sealing gasket 15 is configured so that at least its inner ring portion is made of a flexible material. In this way, during the movement of the push rod 6, the inner ring of the sealing gasket 15 always fits the outer surface of the push rod 6, thereby preventing foreign matter from passing through the gap between the push rod 6 and the partition 10, and preventing foreign matter from entering the internal space and causing damage to the contactor.

[0037] As shown in Figures 1 and 5 , when the magnetic circuit system 4 is in a non-energized state, no magnetic force is generated within the magnetic circuit system 4 , and the push rod 6 returns to its initial position due to the action of the return spring 8 . The sealing gasket 15 deforms downward following the movement of the push rod 6 . As shown in Figure 6 , when the magnetic circuit system 4 is energized to generate magnetic force, the push rod 6 is actuated to move upward, and the sealing gasket 15 deforms upward following the movement of the push rod 6 . That is, the sealing gasket 15 can deform following the movement of the push rod 6 , thereby improving the sealing performance of the gap between the push rod 6 and the partition 10 .

[0038] In this embodiment, the inner gasket 16 is positioned between the two layers of sealing gaskets 15 to increase the gap between them, providing space for the sealing gasket 15 to deform with the movement of the push rod 6, making deformation of the sealing gasket 15 easier. Compared to a case where the inner gasket 16 is positioned above or below the two layers of sealing gaskets 15, where the two layers of sealing gaskets 15 are too close together and deformation of the sealing gaskets 15 is affected, the inner gasket 16 is positioned between the two layers of sealing gaskets 15 in this embodiment to increase the gap between them, making deformation of the sealing gasket 15 easier and providing better sealing performance for the gap between the push rod 6 and the partition 10.

[0039] In some embodiments, only one sealing gasket 15 may be provided, which reduces manufacturing costs. However, in this embodiment, two layers of sealing gaskets 15 are used to provide better sealing performance for the gap between the push rod 6 and the partition 10. In some embodiments, more than two layers of sealing gaskets 15 may be provided to further improve the sealing performance. In some embodiments, when only one sealing gasket 15 is provided, an inner gasket 16 is provided below the single-layer sealing gasket 15, thereby raising the sealing gasket 15 and providing deformation space for the sealing gasket 15 to deform with the movement of the push rod 6.

[0040] In some other embodiments, the inner gasket 16 may not be provided.

[0041] The outer gasket 14 and the partition 10 can be fixed by welding or bonding, or an installation and fixing structure can be provided between the outer gasket 14 and the partition 10. The installation and fixing structure can be, for example, a threaded structure or a snap, so as to fix the outer gasket 14 on the surface of the partition 10, and press the inner gasket 16 and the sealing gasket 15 between the outer gasket 14 and the partition 10. The outer gasket 14 can be a rigid material, such as steel. In this embodiment, the sealing gasket 15 is made of a flexible material as a whole. For example, the sealing gasket 15 can be a polyester film, such as a polyimide film. The sealing gasket 15 is made of a flexible material as a whole, which can achieve a better sealing effect. Alternatively, the sealing gasket 15 can be configured so that its inner ring portion is a flexible material and the outer ring portion is a rigid or semi-rigid material. This composite structure of the sealing gasket can adapt to a larger extrusion force and can improve the durability of the sealing gasket.

[0042] In this embodiment, a receiving groove is provided on the partition 10 for accommodating the sealing gasket 15 or for accommodating both the inner gasket 16 and the sealing gasket 15. In other embodiments, a receiving groove for accommodating the inner gasket 16 and the sealing gasket 15 may be provided on the outer gasket 14, or both the partition 10 and the outer gasket 14 may be provided with receiving grooves for accommodating the inner gasket 16 and the sealing gasket 15. The provision of the receiving groove provides more space for deformation of the inner gasket 16 and the sealing gasket 15, thereby improving sealing performance.

[0043] In some embodiments, the outer gasket 14 may not be provided, and the sealing gasket 15 or the inner gasket 16 and the sealing gasket 15 may be installed on the partition 10 through a mounting structure. For example, the sealing gasket 15 or the inner gasket 16 and the sealing gasket 15 may be installed on the partition 10 through a bonding structure. Alternatively, the mounting structure may be a combination of screws and gaskets, etc. Alternatively, a mounting groove may be provided on the partition 10, and the sealing gasket 15 or the inner gasket 16 and the sealing gasket 15 may be embedded in the mounting groove of the partition 10. Alternatively, the sealing gasket 15 and the partition 10 may be integrally formed, or the inner gasket 16 and the sealing gasket 15 and the partition 10 may be integrally formed. In this embodiment, the sealing gasket 15 or the inner gasket 16 and the sealing gasket 15 are installed on the partition 10 through the outer gasket 14, which makes the installation simple and the processing cost low.

[0044] In some embodiments, the partition 10 can be a yoke iron plate of the magnetic circuit system 4, and the sealing gasket 15 and the inner gasket 16 are directly arranged in the groove of the yoke iron plate, thereby improving the space utilization in the height direction of the contactor 1 and reducing the volume and manufacturing cost of the contactor 1.

[0045] Although this embodiment is described by taking the push rod anti-jamming structure provided in the contactor as an example, the push rod anti-jamming structure has the function of preventing foreign objects from invading the protected space, and can also be used in other types of switching electrical appliances, such as relays.

[0046] Although the present disclosure has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the disclosure without departing from the spirit and scope of the disclosure as defined in the appended claims, all of which are within the scope of protection of the disclosure.

Claims

1. A push rod anti-stuck structure for a switch electrical appliance; the switch electrical appliance includes a partition, and the push rod is movably arranged through the partition, characterized in that: The push rod anti-stuck structure includes a sealing gasket that can be set on the partition, the sealing gasket is provided with a through hole for the push rod to pass through, the push rod is interference fit with the through hole, and the sealing gasket is configured so that at least the inner ring part that contacts the push rod is made of a flexible material, so that the sealing gasket can deform with the movement of the push rod.

2. The push rod anti-stuck structure according to claim 1, characterized in that: The push rod anti-stuck structure includes more than two layers of sealing gaskets.

3. The push rod anti-stuck structure according to claim 1, characterized in that: The push rod anti-stuck structure further comprises an inner gasket which can be arranged on the partition plate. The inner gasket is provided with a through hole for the push rod to pass through. The push rod is loosely matched with the through hole of the inner gasket.

4. The push rod anti-stuck structure according to claim 3, characterized in that: The sealing gasket is a single layer, and the inner gasket is arranged between the sealing gasket and the partition; or the sealing gasket is a two-layer, and the inner gasket is arranged between the two layers of the sealing gasket.

5. The push rod anti-stuck structure according to claim 1, characterized in that: The push rod anti-stuck structure also includes an outer gasket, which is provided with a through hole for the push rod to pass through. The push rod and the through hole of the outer gasket are gap-matched. The outer gasket can be installed on the partition, thereby installing the sealing gasket between the outer gasket and the partition.

6. The push rod anti-stuck structure according to claim 5, characterized in that: The outer gasket and / or the partition are provided with a receiving groove, and the receiving groove is used to receive the sealing gasket.

7. The push rod anti-stuck structure according to claim 1, characterized in that: The sealing gasket is made of flexible material as a whole.

8. The push rod anti-stuck structure according to claim 7, characterized in that: The sealing gasket is made of polyester film material.

9. A switch device, wherein a first space and a second space are provided therein, and the switch device is further provided with a partition plate as a partition structure between the first space and the second space in the switch device and a push rod, wherein the push rod is movably provided through the partition plate, characterized in that: A push rod anti-stuck structure according to any one of claims 1 to 8 is provided between the partition and the push rod.

10. The switch device according to claim 9, characterized in that: The switching device is a contactor.

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