Contact knife driving mechanism of disconnecting switch

Abstract

The utility model provides a contact knife driving mechanism of an isolation switch, comprising a contact knife which can be installed on a switch body in a vertically linear moving manner, and one side of the contact knife is provided with a rack; the main gear is fixed on the main shaft and is in linkage rotation with the main shaft; the driven gear is meshed with the rack; the intermediate gear and the driven gear are coaxially arranged, the intermediate gear is meshed and connected with the main gear, and the main gear drives the driven gear to rotate through the intermediate gear, so that compared with the rotating mode of the contact knife in the prior art, a spring and a supporting rod are omitted, the interphase distance of the contact knife in the opening and closing process is ensured, and the occupied space of a cabinet body is reduced; miniaturization is achieved, and the production cost is reduced; in addition, the main gear, the intermediate gear and the driven gear realize speed-changing transmission through the large gear, the small gear and the middle gear, so that the speed-changing transmission mechanism is better matched with a spring operating mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a contact blade driving mechanism of an isolating switch. Background Art

[0002] Three-position isolating switches and two-position isolating switches are often used in fully enclosed combination electrical appliances or ring network cabinets. Existing isolating switches use double-pole rotation angles to achieve opening and closing, such as Figure 5 As shown, the contact blade assembly includes two blades 02 positioned opposite each other, with a space formed between the blades 02 for insertion of the static contact 01. A support rod 03 extends through the blades 02, and springs 04 are mounted on both ends of the support rod 03, on the outer sides of the blades 02, to provide a force that pulls the blades 02 toward each other. The contact blade assembly is relatively complex in structure and cumbersome to assemble. Furthermore, the presence of the support rods, considering the phase-to-phase distance between adjacent contact blade assemblies, increases the overall cabinet size, increasing production costs. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that the contact blade assembly structure is relatively complex, the assembly is cumbersome, and the box size is large, thereby providing a contact blade drive mechanism for an isolating switch with a simple structure and miniaturization.

[0004] To this end, the present invention provides a contact knife driving mechanism of an isolating switch, comprising a contact knife, a main gear, a driven gear and an intermediate gear. The contact knife can be installed on the switch body so as to move linearly up and down, and a rack is provided on one side of the contact knife; the main gear is fixed on the main shaft and rotates in conjunction with the main shaft; the driven gear is meshed with the rack; the intermediate gear is coaxially arranged with the driven gear, the intermediate gear is meshed with the main gear, and the main gear drives the driven gear to rotate through the intermediate gear, wherein the diameter of the main gear is larger than the diameter of the driven gear, and the diameter of the driven gear is larger than the diameter of the intermediate gear.

[0005] A vertically arranged guide sleeve is provided in the switch body, and a sliding groove is formed on the guide sleeve for the contact knife to move up and down.

[0006] The inner wall of the guide sleeve is provided with a plurality of convex ribs arranged at intervals.

[0007] Two supporting arms arranged in parallel and extending outward are provided on the outer wall of the guide sleeve, a rotating shaft is provided between the two supporting arms, and the driven gear and the intermediate gear are sleeved on the rotating shaft.

[0008] The technical solution of this utility model has the following advantages:

[0009] The camshaft is connected to the main shaft by a toothed plate, and the toothed plate is connected to the main shaft by a toothed plate. The toothed plate is connected to the main shaft by a toothed plate, and the toothed plate is connected to the main shaft by a toothed plate. The toothed plate is connected to the main shaft by a toothed plate, and the toothed plate is connected to the main shaft by a toothed plate.

[0010] 2. The contact blade drive mechanism of the isolating switch provided by the utility model has a vertically arranged guide sleeve provided in the switch body. The guide sleeve is formed with a slide groove for the contact blade to move up and down, thereby ensuring the movement direction of the contact blade. Furthermore, a plurality of spaced ribs are provided on the inner wall of the guide sleeve. The ribs reduce the sliding contact area between the contact blade and the guide sleeve, reduce friction, and thus reduce the requirements for the contact blade driving force.

[0011] 3. The contact blade drive mechanism of the isolating switch provided by the utility model has two parallel arms extending outward on the outer wall of the guide sleeve, a rotating shaft is provided between the two arms, and a driven gear and an intermediate gear are sleeved on the rotating shaft. By utilizing the arms of the guide sleeve to install the two gears, the structure is simpler and more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a three-dimensional diagram of the disconnector;

[0014] Figure 2 A perspective view of the touch knife drive mechanism;

[0015] Figure 3 The exploded structure diagram of the knife-touch driving mechanism;

[0016] Figure 4The exploded structural diagram of the guide sleeve, rack, intermediate gear and driven gear;

[0017] Figure 5 It is a structural diagram of a static contact and a contact blade assembly in the prior art.

[0018] Description of reference numerals: 01, static contact; 02, blade; 03, support rod; 04, spring;

[0019] 1. Contact knife; 2. Switch body; 3. Main shaft; 14. Rack; 15. Main gear; 16. Driven gear; 17. Intermediate gear; 18. Guide sleeve; 19. Slide groove; 21. Support arm; 33. Raised rib. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example

[0025] This embodiment provides a contact blade drive mechanism for an isolating switch, such as Figure 1As shown, it includes a contact blade 1, a main gear 15, a driven gear 16, an intermediate gear 17 and a guide sleeve 18.

[0026] The contact blade 1 is mounted on the switch body 2 so as to be movable up and down in a straight line. A rack 14 is provided on one side of the contact blade 1 .

[0027] like Figure 2 As shown, the main gear 15 is fixed on the main shaft 3 and rotates in conjunction with the main shaft 3.

[0028] The driven gear 16 is meshed and connected with the rack 14 .

[0029] The intermediate gear 17 is coaxially arranged with the driven gear 16, and the intermediate gear 17 is meshed and connected with the main gear 15. The main gear 15 drives the driven gear 16 to rotate through the intermediate gear 17, wherein the diameter of the main gear 15 is larger than the diameter of the driven gear 16, and the diameter of the driven gear 16 is larger than the diameter of the intermediate gear 17.

[0030] The guide sleeve 18 is arranged in the switch body 2 along the vertical direction. Figure 3 and Figure 4 As shown, the guide sleeve 18 is formed with a slide groove 19 for the upward and downward movement of the stylus blade 1. The inner wall of the guide sleeve 18 is provided with a plurality of spaced ribs 33. The outer wall of the guide sleeve 18 is provided with two parallel, outwardly extending arms 21. A rotating shaft is provided between the two arms 21, and the driven gear 16 and the intermediate gear 17 are mounted on the rotating shaft.

[0031] The contact knife driving mechanism of the isolating switch provided by the present invention includes a rack 14, a main gear 15, an intermediate gear 17 and a driven gear 16. The main gear 15 is fixed on the main shaft 3 and rotates in conjunction with the main shaft 3. The driven gear 16 is meshed with the rack 14. The intermediate gear 17 is coaxially arranged with the driven gear 16 and is meshed with the main gear 15. When the main shaft 3 rotates, it can drive the main gear 15 to rotate, and then drive the rack 14 to move along a straight line through the intermediate gear 17 and the driven gear 16, thereby driving the contact knife 1 to move. Compared with the prior art contact knife adopting Compared with the rotation method, the spring and the support rod are eliminated, thereby ensuring the phase-to-phase distance between the three phases A, B, and C of the contact knife during the opening and closing process, reducing the space occupied by the cabinet, being more miniaturized, and reducing the production cost; in addition, the diameter of the main gear 15 is larger than the diameter of the driven gear 16, and the diameter of the driven gear 16 is larger than the diameter of the intermediate gear 17. Since the spring operating mechanism drives the main shaft to rotate very quickly during opening and closing, the speed change transmission is realized through the large gear, small gear and middle gear, which is more compatible with the spring operating mechanism.

[0032] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A contact blade drive mechanism for an isolating switch, characterized in that: include: A touch knife (1) is mounted on the switch body (2) so as to be movable linearly up and down, and a rack (14) is provided on one side of the touch knife (1); A main gear (15) is fixed to the main shaft (3) and rotates in conjunction with the main shaft (3); A driven gear (16) meshingly connected to the rack (14); An intermediate gear (17) is coaxially arranged with the driven gear (16), and the intermediate gear (17) is meshed and connected with the main gear (15). The main gear (15) drives the driven gear (16) to rotate through the intermediate gear (17), wherein the diameter of the main gear (15) is larger than the diameter of the driven gear (16), and the diameter of the driven gear (16) is larger than the diameter of the intermediate gear (17).

2. The contact blade driving mechanism of the disconnector according to claim 1, characterized in that: A vertically arranged guide sleeve (18) is provided in the switch body (2), and the guide sleeve (18) is formed with a sliding groove (19) for the contact knife (1) to move up and down.

3. The contact blade driving mechanism of the disconnector according to claim 2, characterized in that: The inner wall of the guide sleeve (18) is provided with a plurality of convex ribs (33) arranged at intervals.

4. The contact blade drive mechanism of the disconnector according to claim 2 or 3, characterized in that: Two parallel supporting arms (21) extending outward are provided on the outer wall of the guide sleeve (18), a rotating shaft is provided between the two supporting arms (21), and the driven gear (16) and the intermediate gear (17) are sleeved on the rotating shaft.

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