Static contact mounting structure and isolating switch

Abstract

A static contact installation structure and an isolation switch, the static contact installation structure comprises a pedestal housing, a static contact and a wiring screw, the static contact is installed in a static contact installation groove on the pedestal housing, and the wiring screw is installed at a wiring end of the static contact through threaded connection and is used for external wiring of the switch. The wiring screw is provided with a tile pad which is used for pressing an external connection wire when the external connection wire is switched on and off, a tile pad guiding and limiting part is arranged on one side surface, corresponding to the tile pad, of the static contact, and the tile pad guiding and limiting part plays a role in guiding and limiting in the screwing-in and retreating process of the wiring screw. The tile pad guiding and limiting part is arranged on the side surface, corresponding to the tile pad, of the static contact, so that the tile pad is prevented from rotating in the rotating process of the wiring screw; and meanwhile, the retreating distance of the head of the wiring screw is larger than the thread length of the wiring screw, so that the shell is prevented from being clamped and deformed due to stress in the retreating process of the wiring screw.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the switch technical field, specifically is related to a static contact installation structure and isolator. BACKGROUND

[0002] A rotary switch is a common switch that prevents an unauthorized operation of a rotary operating device by locking a rotary operator at a specific position corresponding to a specific state of the rotary operating device. Rotary disconnect switches are widely used in power systems, such as photovoltaic, wind power, etc. For example, in a photovoltaic system, small currents generated in each photovoltaic cell are combined in parallel to provide the required current or total power to the system. The rotary disconnect switch includes a moving contact module and a static contact module. The moving contact rotates in an open space and includes two moving contact pieces made of conductive metal material riveted together. The static contact points of the static contact are stationary in the space and suspended between the movement trajectories of the two moving contact pieces. There are usually two or more contact points for making and breaking the current. When making, the static contact points are between the two moving contact pieces of the moving contact, and the moving contact bends to clamp the static contact points. When breaking, the moving contact overcomes the resistance and leaves the static contact.

[0003] At present, the wiring end of the static contact of the isolator is locked on the shell of the contact module by a screw. During the locking process of the screw and the static contact, the tile gasket is prone to rotate. In order to prevent the tile gasket from rotating, a protrusion is provided on the base to press the rotating surface of the tile gasket, thereby preventing rotation. However, because the plastic tile gasket will deform under stress, the placement of the tile gasket will fail to prevent rotation. On the other hand, when the screw needs to be removed, due to the limited space behind the screw, when the screw head is withdrawn to contact the inner surface of the shell, the threaded part of the screw is still in the corresponding threaded hole of the static contact. At this time, if the screw is continued to be withdrawn, the inner surface of the shell will be stressed until it deforms and gets stuck. The deformation of the shell at the stuck part is severe, and in severe cases, the entire switch can only be scrapped. UTILITY MODEL CONTENTS

[0004] The utility model aims at the defects of the existing static contact screw installation, and provides a static contact installation structure and isolator. Through the improvement of the static contact installation structure, the rotation of the tile gasket during the rotation of the wiring screw is prevented, and the retreat distance of the head of the wiring screw is greater than the thread length of the wiring screw. The stress of the shell caused by the retreat of the wiring screw is avoided.

[0005] TECHNICAL SCHEME

[0006] In order to achieve the above technical purpose, the utility model provides a static contact installation structure, it includes base shell, static contact, binding screw, static contact is installed in the static contact installation groove on base shell, binding screw is through the threaded joint dress in static contact's binding end is used for switch external wiring, the binding screw is equipped with tile pad and is used for switch external wiring when the pressure tight external wiring, its characterized in that: static contact's one side face corresponding with tile pad is provided with tile pad guide limiting portion, tile pad guide limiting portion plays the guide and the limiting effect in the process of binding screw spin in and exit.

[0007] In one embodiment, the length of the tile pad guide limiting portion in the direction of the binding screw spinning in and out is greater than or equal to the travel of the binding screw spinning in and out.

[0008] In one embodiment, the gap m between the tile pad guide limiting portion and the corresponding face of the tile pad is less than the gap between the other faces of the tile pad and the base shell.

[0009] In one embodiment, the tile pad guide limiting portion is a protrusion on the static contact.

[0010] In one embodiment, the gap between the tile pad guide limiting portion and the corresponding face of the tile pad is less than 0.1mm.

[0011] In one embodiment, the retraction distance of the head of the binding screw is greater than the thread length of the binding screw.

[0012] In one embodiment, the diameter of the optical axis of the binding screw is less than the diameter of the addendum circle of the threaded hole on the static contact corresponding to the installation of the binding screw.

[0013] The utility model also provides an isolating switch, characterized in that: including contact system, operating mechanism and handle assembly, the contact system includes above -mentioned static contact installation structure.

[0014] Advantages

[0015] The utility model provides a kind of static contact mounting structure and disconnecting switch, static contact mounting structure includes base shell, static contact, binding screw, static contact is installed in the static contact installation slot on base shell, binding screw is connected by thread and is installed in the binding end of the static contact for switch external wiring, binding screw is equipped with tile pad for the external wiring of switch when pressing external wiring, the side surface corresponding with tile pad on static contact is provided with tile pad guide limiting part, the tile pad guide limiting part plays the role of guiding and limiting during the process of screwing in and out of the binding screw.The tile pad guide limiting part is provided on the side surface corresponding with tile pad on static contact, prevent the rotation of tile pad during the rotation of binding screw, and make the retreat distance of binding screw head greater than the thread length of the binding screw, avoid the deformation of shell stuck by force during the retreat of binding screw. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, without paying creative labor, other related drawings can also be obtained according to these drawings.

[0017] FIG. 1 is a schematic diagram of a disconnecting switch in the embodiment of the utility model; Figure 1

[0018] FIG. 2 is a schematic diagram of the position of static contact mounting structure in the embodiment of the utility model; Figure 2 Figure 1

[0019] FIG. 3 is a schematic diagram of the position of static contact mounting structure in the embodiment of the utility model; Figure 3 Figure 2

[0020] FIG. 4 is a top view of the position of static contact mounting structure in the embodiment of the utility model; Figure 4a

[0021] FIG. 5 is an enlarged view of A in FIG. 4. Figure 4b Figure 4a

[0022] FIG. 6 is a front view of the position of static contact mounting structure in the embodiment of the utility model; Figure 5

[0023] FIG. 7 is a schematic diagram of static contact mounting structure in the embodiment of the utility model; Figure 6

[0024] FIG. 8 is a schematic diagram of static contact mounting structure in the embodiment of the utility model; Figure 7

[0025] ​​​​​​​​​​​​Figure 8 is a main view of the static contact mounting structure in the embodiment of the utility model; DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely explained in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only embodiments.

[0028] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0029] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0031] Embodiment

[0032] At present, the wiring end of the static contact of the isolating switch is locked on the shell of the contact module by screws. During the locking of the static contact by the screws, the tile is prone to rotating. In order to prevent the tile from rotating, a protrusion is mainly arranged on the base to press the rotating surface of the tile, thereby playing a role of anti-rotation. However, because the plastic tile is prone to stress deformation, the tile is prone to rotating failure. On the other hand, when the screws need to be withdrawn, because the space behind the screws is limited, when the head of the screw is withdrawn to contact the inner surface of the shell, the part with the screw thread of the screw is still in the threaded hole corresponding to the static contact. At this time, if the screw is continuously withdrawn, the inner surface of the shell will be stressed until deformed and stuck. The shell at the stuck position is severely deformed, and in severe cases, the shell cannot be continuously used, and the entire switch can only be scrapped.

[0033] In order to solve this problem, the embodiment provides a static contact mounting structure. The static contact mounting structure comprises a base shell 1, a static contact 2, and a wiring screw 3. The static contact 2 is mounted in a static contact mounting groove 101 on the base shell 1. The wiring screw 3 is connected to the wiring end of the static contact 2 by threads to be used for external wiring of the switch. The wiring screw 3 is provided with a tile 4 to press the external wiring when the external wiring of the switch is performed. A tile guide limiting part 201 is arranged on one side surface 2a of the static contact 2 corresponding to the tile 4. The tile guide limiting part 201 plays a guiding and limiting role during the rotation of the wiring screw 3.

[0034] Specifically, as shown in FIGS. 3, 4a, 4b, and 5, in the embodiment, the tile guide limiting part 201 is a protrusion on the static contact 2. The length of the tile guide limiting part 201 in the rotation direction of the wiring screw 3 is greater than or equal to the rotation stroke of the wiring screw 3. As shown in FIGS. 4a and 4b, the gap m between the tile guide limiting part 201 and the side surface 2a corresponding to the tile 4 is less than the gap between the other surfaces of the tile 4 and the base shell 1. In the embodiment, the gap between the tile guide limiting part 201 and the side surface corresponding to the tile 4 is less than 0.1 mm. In this way, because the length of the tile guide limiting part 201 in the rotation direction of the wiring screw 3 is greater than the rotation stroke of the wiring screw 3, the tile guide limiting part 201 plays a role during the rotation of the wiring screw. At the same time, because the gap m between the tile guide limiting part 201 and the side surface corresponding to the tile 4 is less than the gap between the other surfaces of the tile 4 and the base shell 1, even if the static contact 2 rotates, the static contact 2 will first contact the tile 4. In this way, the rotation of the tile 4 is limited by the gap between the metal static contact and the metal tile, and the static contact will not contact the plastic shell, thereby avoiding the stress deformation of the plastic shell. Figure 2 Figure 4a 4b ​​​

[0035] In addition, as attached Figure 6 As shown in Figures 7 and 8, in the present invention, the retreat distance of the head of the wiring screw 3 on the base shell 1 adjacent to the above-mentioned base shell 1 on the disconnector is greater than the thread length of the wiring screw 3. Therefore, when the head of the wiring screw 3 retreats to the surface of the shell and continues to screw in, the tail of the wiring screw has no thread and is the optical axis part. Moreover, because the diameter of the optical axis of the wiring screw 3 is smaller than the tooth top circle diameter of the threaded hole corresponding to the installation of the wiring screw 3 on the static contact 2, there is a gap between the optical axis part and the tooth top circle diameter, so the shell will not be deformed and stuck due to force, and the problem of the screw being stuck after retreat is fundamentally avoided. It should be noted that the above-mentioned static contact mounting structure on the contact shell 1 of the adjacent base layer of the disconnector is only expressed by the static contact mounting structure of different layers for the convenience of expression. The static contact mounting structure on the contact shell 1 of the adjacent base layer is suitable for the installation of static contacts on the disconnector.

[0036] As attached Figure 1 and 2 As shown, this embodiment further provides an isolating switch, including a contact system n, an operating mechanism K, and a handle assembly Q. The contact system n includes the aforementioned static contact mounting structure. It should also be noted that this embodiment does not specifically limit the overall product layout of the isolating switch. Any isolating switch including the aforementioned static contact mounting structure shall be deemed to fall within the scope of protection of this utility model.

[0037] The utility model provides a static contact mounting structure and an isolating switch. In this structure, a tile guide limit portion 201 is provided on a side surface 2a of the static contact corresponding to the tile 4, thereby preventing the tile from rotating during the rotation of the wiring screw. At the same time, the retreat distance of the head of the wiring screw 3 is made greater than the thread length of the wiring screw 3, thereby preventing the shell from being stuck and deformed during the retreat of the wiring screw.

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A stationary contact mounting structure comprising a base housing (1), a stationary contact (2), and a terminal screw (3), the stationary contact (2) being mounted in a stationary contact mounting groove (101) of the base housing (1), the terminal screw (3) being threadedly attached to a terminal end of the stationary contact (2) for external wiring of a switch, and a washer (4) being attached to the terminal screw (3) for pressing the external wiring when the external wiring of the switch is connected, characterized in that: A tile guide limiting part (201) is arranged on the side (2a) of the fixed contact (2) corresponding to the tile (4), which plays a guiding and limiting role during the screwing in and out of the terminal screw (3). ​ 2. A stationary contact mounting structure as claimed in claim 1, characterized in that: The length of the tile guide limiting part (201) in the screwing in and out direction of the terminal screw (3) is greater than or equal to the screwing in and out stroke of the terminal screw (3).

3. A stationary contact mounting structure as claimed in claim 2, characterized in that: The gap (m) between the tile guide limiting part (201) and the side of the tile (4) corresponding thereto is less than the gap between the other side of the tile (4) and the base shell (1).

4. A stationary contact mounting structure as claimed in claim 1, characterized in that: The tile guide limiting part (201) is a protrusion on the fixed contact (2).

5. A stationary contact mounting structure as claimed in claim 3, characterized in that: The gap between the tile guide limiting part (201) and the side of the tile (4) corresponding thereto is less than 0.1mm.

6. A stationary contact mounting structure as claimed in claim 1, characterized in that: The retreat distance of the head of the terminal screw (3) is greater than the thread length of the terminal screw (3).

7. A stationary contact mounting structure as claimed in claim 1, characterized in that: The diameter of the optical axis of the terminal screw (3) is less than the diameter of the addendum circle of the threaded hole on the fixed contact (2) corresponding to the installation of the terminal screw (3).

8. A disconnector, characterized by: The contact system (n) includes the fixed contact mounting structure of any one of claims 1-7, the operating mechanism (K), and the handle assembly (Q).

Images