Ejector rod assembling component and release

Abstract

The utility model relates to an ejector rod assembling assembly and a release, the ejector rod assembling assembly comprises a housing with a cavity and an ejector rod slidably arranged in the cavity, the housing is provided with a guide jack, the ejector rod is inserted and matched in the guide jack and can be slidably ejected out of the guide jack, the ejection direction of the ejector rod is upward, and the guide jack is inserted into the guide jack. The direction opposite to the upward direction is downward, a containing groove is fixedly formed in the peripheral side of the ejector rod, the opening direction of the containing groove is upward, and the projection range of the containing groove in the vertical direction at least covers the projection range of the fit clearance of the ejector rod and the guide insertion hole in the vertical direction. Even if a foreign matter falls into the cavity from the guide insertion hole, the foreign matter can be received by the containing groove, and the foreign matter is prevented from entering other positions of the cavity. When the ejector rod assembling component is applied to the release, the accommodating groove can effectively prevent foreign matters from entering the cavity to pollute other parts such as a driving part in the cavity, and the reliability of the release is improved.

Description

Technical Field

[0001] The utility model relates to accessories of switching electrical appliances, in particular to improvements in trip units. Background Art

[0002] In switching electrical appliances such as circuit breakers and relays, a trip unit is an important component. Generally speaking, the function of the trip unit is to trigger the locking mechanism in the switching electrical appliance, so that the switching electrical appliance quickly trips and breaks, thereby cutting off the fault current and protecting the line and equipment.

[0003] The ejector rod is a commonly used mechanical trigger structure in the trip unit. The ejector rod is usually arranged in the housing of the trip unit in a slidable manner. When the trip unit works, the ejector rod is driven by a driving component to eject outwards to trigger the locking mechanism. There are various types of driving components, and those commonly used in the prior art include driving components with thermal deformation, electromagnetic driving components, etc.

[0004] In order to configure the ejector rod, a guiding jack is usually opened on the housing of the trip unit, and the ejector rod is inserted and matched in the guiding jack. However, due to the gap between the ejector rod and the guiding jack, foreign objects outside the trip unit may enter the interior of the trip unit through this gap, contaminating the components inside the trip unit and thus affecting the reliability of the trip unit. Summary of the Utility Model

[0005] Therefore, in view of the above problems, the utility model proposes an ejector rod assembly with optimized structure and a trip unit having the ejector rod assembly.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] The utility model proposes an ejector rod assembly, which includes a housing with a cavity and an ejector rod slidably arranged in the cavity. A guiding jack is provided on the housing, and the ejector rod is inserted and matched in the guiding jack and can slide out from the guiding jack. Taking the ejecting direction of the ejector rod as upward and the direction opposite to upward as downward, a receiving groove is fixedly arranged on the circumferential side of the ejector rod. The opening direction of the receiving groove faces upward, and the projection range of the receiving groove in the up-down direction at least covers the projection range of the fitting gap between the ejector rod and the guiding jack in the up-down direction.

[0008] In one embodiment, when the ejector rod ejects, the upper end of the receiving groove can approach and even abut against the inner side of the housing, thereby basically closing the opening of the receiving groove.

[0009] In one embodiment, the receiving groove includes a groove wall surrounding the outside of the ejector rod and a groove bottom connecting the groove wall and the ejector rod.

[0010] In one embodiment, a sealing portion is fixedly provided on the inner side of the housing. The receiving groove is an annular groove, and the sealing portion is an annular structure extending downward. When the ejector rod is ejected, the sealing portion can be inserted into the receiving groove.

[0011] In one embodiment, the inner annular aperture of the sealing portion is equal to the aperture of the guiding jack. The sealing portion is an annular structure extending downward from the lower end of the guiding jack.

[0012] In one embodiment, the upper end of the ejector rod protrudes from the housing. An enlarged diameter portion is fixedly provided at the upper end of the ejector rod. The outer diameter of the enlarged diameter portion is greater than the aperture of the guiding jack. Thus, when the ejector rod slides downward, the enlarged diameter portion can cover the upper hole end of the guiding jack.

[0013] Based on the above ejector rod assembly, the present utility model further provides a release mechanism, including the above ejector rod assembly. The housing is a release mechanism housing, and further includes a driving component for driving the ejector rod to eject upward.

[0014] In one embodiment, the release mechanism is an electromagnetic release mechanism, and the driving component drives the ejector rod through the action of electromagnetic force.

[0015] The present utility model has the following beneficial effects: The present utility model is provided with a receiving groove with an upward opening on the periphery of the ejector rod. The opening range of the receiving groove can completely cover the fitting clearance between the ejector rod and the guiding jack. Even if foreign matter falls into the cavity from the guiding jack, it will be received by the receiving groove, avoiding the entry of foreign matter into other positions of the cavity. When the ejector rod assembly of the present utility model is applied to a release mechanism, the receiving groove can effectively prevent foreign matter from entering the cavity and contaminating other components in the cavity, such as the driving component, improving the reliability of the release mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of the ejector rod assembly in the embodiment, where the ejector rod is in the retracted position;

[0017] Figure 2 is a cross-sectional view of the ejector rod assembly in the embodiment, where the ejector rod is in the ejected position;

[0018] Figure 3 is a schematic diagram of the ejector rod in the embodiment;

[0019] Figure 4 is a schematic diagram of the housing in the embodiment;

[0020] Figure 5 is a schematic diagram of a variant of the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To further illustrate each embodiment, the present utility model provides attached drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0022] The present utility model will be further described below in conjunction with the attached drawings and specific implementation manners.

[0023] Embodiment 1:

[0024] Referring to Figures 1-4 As shown, as a preferred embodiment of the present utility model, a ejector rod assembly is provided, including a housing 1 and an ejector rod 2. The housing 1 has a cavity 11, and the ejector rod 2 is slidably disposed in the cavity 11. Specifically, a guiding insertion hole 12 is provided on the housing 1, and the ejector rod 2 is inserted into the guiding insertion hole 12 with a clearance fit, so that the ejector rod 2 can slide out of the housing 1 along the guiding insertion hole 12 or slide back along the guiding insertion hole 12. For the convenience of description, in this embodiment, the ejecting direction of the ejector rod 2 is upward, and the direction opposite to the upward is downward, that is Figure 1 and Figure 2 in, the T1 direction is upward and the T2 direction is downward.

[0025] A receiving groove 21 is fixedly provided on the circumferential side of the ejector rod 2, and the opening direction of the receiving groove 21 faces upward. In this embodiment, the receiving groove 21 is implemented as an annular groove, including a groove wall 211 surrounding the ejector rod 2 and a groove bottom 212 connecting the groove wall 211 and the ejector rod 2. With such a setting, the opening range of the receiving groove 21 can completely cover the fitting clearance between the ejector rod 2 and the guiding insertion hole 12. Thus, even if foreign objects fall into the cavity 11 from the guiding insertion hole 12, they will be received by the receiving groove 21, preventing foreign objects from entering other positions in the cavity 11. When the ejector rod assembly of this embodiment is applied in a release, the receiving groove 21 can effectively prevent foreign objects from entering the cavity 11 and contaminating other components in the cavity 11, such as the driving components, improving the reliability of the release.

[0026] The structure of the receiving groove 21 can be changed according to needs, as long as it is a groove structure with an upward opening, and the projection range of the groove in the up-down direction at least covers the projection range of the fitting clearance between the ejector rod 3 and the guiding insertion hole 12 in the up-down direction.

[0027] Such as Figure 2, in this embodiment, the accommodation groove 21 is implemented such that when the ejector rod 2 ejects, the upper end of the accommodation groove 21 (in this embodiment, the upper end of the accommodation groove 21 is also the upper end of the groove wall 211) exactly abuts against the inner side of the housing 1, so as to close the opening of the accommodation groove 21 and prevent foreign objects from escaping from the accommodation groove 21 as the ejector rod 2 moves upward. In other embodiments, it may also be that when the ejector rod 2 ejects, the upper end of the accommodation groove 21 approaches the inner side of the housing 1 but does not contact it, which can also basically achieve the effect of closing the opening of the accommodation groove 21 and can prevent the accommodation groove 21 from hitting the housing 1.

[0028] In this embodiment, a sealing portion 13 is fixedly provided on the inner side of the housing 1. The sealing portion 13 is an annular structure extending downward. When the ejector rod 2 ejects, the sealing portion 13 can be inserted into the accommodation groove 21 to form a multi-layer labyrinth sealing structure, further preventing foreign objects from escaping from the accommodation groove 21. In this embodiment, the inner annular diameter of the sealing portion 13 is equal to the diameter of the guiding insertion hole 12. The sealing portion 13 is an annular structure extending downward from the lower end of the guiding insertion hole 12. Thus, the inner annular hole of the sealing portion 13 also serves as a part of the sliding path of the ejector rod 2. Such a setting is equivalent to extending the sliding path of the ejector rod 2, making the sliding connection of the ejector rod 2 more stable.

[0029] Figure 5 A deformation example of this embodiment is shown. In this deformation example, the upper end of the ejector rod 2A exposes the housing 1. A diameter-expanding portion 22 is fixedly provided at the upper end of the ejector rod 2A. The outer diameter of the diameter-expanding portion 22 is greater than the diameter of the guiding insertion hole 12. Thus, when the ejector rod 2A slides downward, or when the ejector rod 2A is in the retracted position, the diameter-expanding portion 22 can cover the upper hole end of the guiding insertion hole 12, further reducing the probability of foreign objects entering the cavity 11 from the guiding insertion hole 12. The diameter-expanding portion 22 can be an independent component relative to the ejector rod 2A, such as a snap ring, and the snap ring is fixedly sleeved on the ejector rod 2A. Alternatively, the diameter-expanding portion 22 can also be integrally formed on the ejector rod 2A.

[0030] The ejector rod assembly provided in this embodiment can be applied to various structures that need to be triggered / transmitted by the ejection of the ejector rod 2, especially suitable for structures where foreign objects are not desired to enter the cavity 11 from the guiding insertion hole 12, such as a release mechanism.

[0031] Embodiment 2:

[0032] This embodiment provides a release used in a latching mechanism of a trigger switchgear to cause the switchgear to quickly trip and disconnect. The release includes the ejector rod assembly of Embodiment 1. Among them, the housing 1 serves as the release housing. The release further includes a driving component disposed in the cavity 11 of the housing 1, and the driving component is used to drive the ejector rod 2 to eject upward. Since the release includes the ejector rod assembly of Embodiment 1, it also has the same technical effects with the same structure.

[0033] In this embodiment, the release is specifically an electromagnetic release, and the driving component drives the ejector rod 2 through the action of electromagnetic force. In other embodiments, the release can also be of other types, such as a thermal release.

[0034] Although the present utility model has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes made to the present utility model in form and detail without departing from the spirit and scope of the present utility model defined by the appended claims all fall within the protection scope of the present utility model.

Claims

1. Ejector rod assembly, comprising a housing with a cavity and an ejector rod slidably disposed in the cavity, wherein a guiding jack is provided on the housing, and the ejector rod is inserted and fitted in the guiding jack and can slide out from the guiding jack. Taking the ejecting direction of the ejector rod as upward and the direction opposite to upward as downward, it is characterized in that: A receiving groove is fixedly provided on the circumferential side of the ejector rod. The opening direction of the receiving groove faces upward, and the projection range of the receiving groove in the up-down direction at least covers the projection range of the fitting clearance between the ejector rod and the guiding jack in the up-down direction.

2. The ejector rod assembly according to claim 1, wherein: The upper end of the receiving groove can approach and even abut against the inner side of the housing when the ejector rod is ejected, so as to substantially close the opening of the receiving groove.

3. The ejector rod assembly component according to claim 1, characterized in that: The receiving groove includes a groove wall surrounding the ejector rod and a groove bottom connecting the groove wall and the ejector rod.

4. The ejector rod assembly according to claim 1, characterized in that: A sealing portion is fixedly provided on the inner side of the housing. The receiving groove is an annular groove, and the sealing portion is an annular structure extending downward. When the ejector rod is ejected, the sealing portion can be inserted into the receiving groove.

5. The ejector rod assembly component according to claim 4, characterized in that: The inner diameter of the annular sealing portion is equal to the diameter of the guiding jack, and the sealing portion is an annular structure extending downward from the lower end of the guiding jack.

6. The ejector rod assembly component according to claim 1, characterized in that: The upper end of the ejector rod protrudes from the housing. An enlarged diameter portion is fixedly provided at the upper end of the ejector rod. The outer diameter of the enlarged diameter portion is greater than the diameter of the guiding jack. Thus, when the ejector rod slides downward, the enlarged diameter portion can cover the upper hole end of the guiding jack.

7. Trip device, characterized in that: It includes the ejector rod assembly according to any one of claims 1-6 and a driving component. The driving component is used to drive the ejector rod to eject upward, and the housing is a release housing.

8. The release according to claim 7, characterized in that: The release is an electromagnetic release, and the driving component drives the ejector rod through the action of electromagnetic force.

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