Open-type knife switch

Abstract

The utility model discloses an open-type knife switch, which comprises a mounting flange and a knife switch body, the knife switch body is provided with a plurality of blades, connecting shafts are arranged among the blades, one side of the mounting flange is provided with a rotating shaft, the mounting flange is provided with an operating shaft, and the operating shaft is perpendicular to the rotating shaft. The rotating shaft is provided with a driven bevel gear and a pushing piece, a rotatable shaft body is arranged in the operating shaft, and a driving bevel gear is arranged at one end of the shaft body and meshed with the driven bevel gear. The rotation speed of the second bevel gear and the driven bevel gear is accelerated through the extension part, the blade is further driven to quickly perform opening and closing actions, arc extinguishing is further accelerated, the distance between an operator and the knife switch body is greatly prolonged through the transmission assembly and the inclined extension part, the creepage distance of the arc is further prolonged, and the service life of the knife switch is prolonged. The product has the advantages of labor-saving opening and closing and improved safety.

Description

Technical Field

[0001] The utility model relates to the technical field of knife switches, in particular to an open knife switch. Background Art

[0002] The open knife switch is applicable to complete sets of distribution devices with an alternating current frequency of 50 Hz, a rated voltage up to 400 V, a direct current up to 230 V, and a rated current up to 3000 A, and is used as a device for manually and infrequently connecting and disconnecting alternating and direct current circuits or as a disconnecting switch.

[0003] In the existing open knife switch, the handle is relatively close to the blade. When the switching-off current is too large, the arc generated will spread to the handle and cause damage to the operator. At the same time, in order to closely fit the contact piece with the blade, a relatively large clamping force is mostly formed on the blade. When the contact piece rusts, the force applied to the handle during switching off greatly increases, resulting in inability to quickly switch off and affecting the arc extinguishing effect. Therefore, the applicant has made a beneficial design and found a solution to the above problems. The technical solution to be introduced below was generated under this background. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies existing in the design of the traditional knife switch, and provide a product that is labor-saving in switching on and off and improves safety.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] An open knife switch includes a mounting flange and a knife switch body. The knife switch body is provided with a plurality of blades, and a connecting shaft is arranged between the blades. One side of the mounting flange is provided with a rotating shaft. The mounting flange is provided with an operating shaft, which is perpendicular to the rotating shaft. The rotating shaft is provided with a driven bevel gear and a pushing member. The operating shaft is internally provided with a rotatable shaft body. One end of the shaft body is provided with a driving bevel gear, which meshes with the driven bevel gear. The pushing member is provided with a transmission assembly and is hinged to the connecting shaft. A baffle plate is arranged directly in front of the mounting flange, and the operating shaft is fixedly connected to the baffle plate. The shaft body is provided with a driving rod, and the driving rod is provided with a bent extension part.

[0007] Preferably, the transmission assembly includes a bearing plate, a screw rod, and a nut. One end of the screw rod is hinged to the connecting shaft, and the screw rod passes through the bearing plate. Two nuts are threadedly connected to the screw rod and abut against both end faces of the bearing plate, so that the screw rod is fixedly connected to the bearing plate. Both sides of the bearing plate are provided with transmission parts, and the transmission parts are arranged between the blades. The operating shaft passes through the transmission parts, and a support rod is arranged between the transmission parts.

[0008] Preferably, the knife switch body includes a plurality of support bases, each support base is provided with a static contact holder and a contact head seat, the contact head seat is provided with a contact head portion for clamping the blade, and an inclined guiding portion is provided at the entrance of the contact head portion.

[0009] Preferably, the static contact holder and the contact head seat are provided with wiring terminal portions, and the wiring terminal portions are provided with a plurality of mounting holes.

[0010] Preferably, the support base is provided with brackets, which are arranged on both sides of the contact head seat, and the brackets are provided with a plurality of arc extinguishing grid plates, which are located above the contact head portion.

[0011] Preferably, one end of the blade is hinged to the static contact holder.

[0012] Preferably, the extension portion is provided with a handle sleeve.

[0013] Advantages:

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] (1) In the present utility model, since the diameter of the inclined extension portion rotating one circle is larger than the diameter of the second bevel gear, the rotation speed of the second bevel gear will accelerate the rapid rotation of the driven bevel gear, thereby accelerating the action time of the blade for opening or closing. Through the cooperation of the above-mentioned various components, the air force required for opening and closing is reduced, ensuring that the blade is stably separated from the contact head, and there will be no situation where the blade gets stuck after moving for a period of time. The separation speed of the blade from the contact head is increased, and the arc extinguishing effect is accelerated, making the product have the advantage of labor-saving opening and closing.

[0016] (2) In the present utility model, through the transmission assembly and the inclined extension portion, the distance between the operator and the knife switch body is greatly extended, thereby extending the creepage distance of the arc. Moreover, the arc shielding plate also prevents the operator from being impacted by the high-temperature hot particles generated by the arc, making the product have the advantage of improving safety. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of an open knife switch of the present utility model Figure 1 ;

[0018] Figure 2 is a schematic structural diagram of an open knife switch of the present utility model Figure 2 ;

[0019] Figure 3 is a schematic structural diagram of an open knife switch of the present utility model Figure 3 ;

[0020] The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0021] Reference numerals: 1, mounting flange; 2, knife switch body; 3, blade; 4, connecting shaft; 5, transmission assembly; 6, arc baffle; 7, driving rod;

[0022] 11, rotating shaft; 12, operating shaft; 13, driven bevel gear; 14, pushing member; 15, driving bevel gear;

[0023] 121, shaft body;

[0024] 21, support base; 22, static contact holder; 23, contact head seat; 24, terminal part; 25, bracket; 26, arc extinguishing grid;

[0025] 231, contact head part; 232, guiding part;

[0026] 241, mounting hole;

[0027] 51, bearing plate; 52, screw; 53, nut; 54, support rod;

[0028] 511, transmission part;

[0029] 71, extension part; 72, handle sleeve. Detailed implementation manners

[0030] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.

[0032] In the embodiments of the present utility model, "and / or" only describes the associated relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0033] Reference example Figures 1 to 3, An open knife switch, including a mounting flange 1 and a knife switch body 2. The knife switch body 2 is provided with a number of blades 3, and a connecting shaft 4 is arranged between the blades 3. One side of the mounting flange 1 is provided with a rotating shaft 11. The mounting flange 1 is provided with an operating shaft 12, which is perpendicular to the rotating shaft 11. The rotating shaft 11 is provided with a driven bevel gear 13 and a pushing member 14. The operating shaft 12 is internally provided with a rotatable shaft body 121. One end of the shaft body 121 is provided with a driving bevel gear 15, which meshes with the driven bevel gear 13. The pushing member 14 is provided with a transmission assembly 5 and is hinged to the connecting shaft 4. A arc baffle 6 is arranged directly in front of the mounting flange 1. The operating shaft 12 is fixedly connected to the arc baffle 6. The shaft body 121 is provided with a driving rod 7. The driving rod 7 is provided with a bent extension 71. Since the diameter of the circle formed by the inclined extension 71 rotating one circle is larger than the diameter of the second bevel gear, the rotation speed of the second bevel gear will accelerate the rapid rotation of the driven bevel gear 13, and then accelerate the action time of the blades 3 for opening or closing. Through the cooperation of the above-mentioned various components, the air force required for opening and closing is reduced, ensuring that the blades 3 are stably separated from the contact part 231, and there will be no situation where the blades 3 get stuck after moving for a period of time, accelerating the separation speed of the blades 3 from the contact part 231, accelerating the arc extinguishing effect, and the arc baffle 6 also prevents the operator from being impacted by the high-temperature burning particles generated by the arc;

[0034] It is worth mentioning that the transmission assembly 5 includes a bearing plate 51, a screw 52, and a nut 53. One end of the screw 52 is hinged to the connecting shaft 4. The screw 52 passes through the bearing plate 51. Two nuts 53 are threadedly connected to the screw 52 and abut against both end faces of the bearing plate 51, so that the screw 52 is fixedly connected to the bearing plate 51. Both sides of the bearing plate 51 are provided with transmission parts 511. The transmission parts 511 are arranged between the blades 3. The operating shaft 12 passes through the transmission parts 511. A support rod 54 is arranged between the transmission parts 511. Through the transmission parts 511, the screw 52 and the extension 71, the distance between the operator and the switch body is greatly extended, and then the creepage distance of the arc is extended. The support rod 54 strengthens the structural strength between the transmission parts 511 and the bearing plate 51;

[0035] It is worth mentioning that the knife switch body 2 includes a number of support bases 21. The support bases 21 are provided with static contact frames 22 and contact seats 23. The contact seats 23 are provided with contact parts 231 for clamping the blades 3. An inclined guiding part 232 is arranged at the entrance of the contact part 231. The static contact frame 22 provides support for the blades 3, and the guiding part 232 facilitates the blades 3 to enter between the contact parts 231;

[0036] It is worth mentioning that the static contact frame 22 and the contact seat 23 are provided with wiring terminal parts 24. The wiring terminal parts 24 are provided with a number of mounting holes 241. Fasteners are arranged in the mounting holes 241 to electrically connect the circuit to the wiring terminal parts 24;

[0037] It is worth mentioning that the support base 21 is provided with brackets 25 which are arranged on both sides of the contact head base 23. The brackets 25 are provided with a plurality of arc extinguishing grid plates 26 which are located above the contact head portion 231. The brackets 25 provide support for the arc extinguishing grid plates 26, and the arc extinguishing grid plates 26 play a role in quickly extinguishing the electric arc.

[0038] It is worth mentioning that one end of the blade 3 is hinged to the static contact holder 22.

[0039] It is worth mentioning that the extension portion 71 is provided with a handle sleeve 72, and the handle sleeve 72 increases the frictional force between the operator and the extension portion 71.

[0040] The working principle of the present utility model is described as follows:

[0041] When the knife switch body 2 needs to be switched off, a thrust is applied to the extension portion 71 to drive the driving rod 7 to drive the shaft body 121 and the driving bevel gear 15 to rotate, and to drive the driven bevel gear 13 to rotate. As the driven bevel gear 13 and the rotating shaft 11 rotate rapidly, the pusher 14 moves rapidly towards the support base 21, and its thrust is transmitted to the transmission portion 511 through the screw 52 and the bearing plate 51. The transmission portion 511 simultaneously separates the blade 3 from the contact head portion 231 through the operating shaft 12. The electric arc generated instantaneously during separation is extinguished by the arc extinguishing grid plates 26, and the small flying arcs that are not completely extinguished are blocked by the mounting flange 1 and the arc baffle 6 to prevent the electric arc from touching the operator. Thus, the switching-off operation step of the knife switch body 2 is completed.

[0042] Through the above design, the product can achieve the advantages of labor-saving switching-on and -off and improved safety.

[0043] The above content further elaborates on the present utility model in combination with specific embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present utility model.

Claims

1. An open knife switch, comprising a mounting flange (1) and a knife switch body (2), wherein the knife switch body (2) is provided with a plurality of blades (3), and is characterized in that: A connecting shaft (4) is provided between the blades (3). One side of the mounting flange (1) is provided with a rotating shaft (11). The mounting flange (1) is provided with an operating shaft (12) which is perpendicular to the rotating shaft (11). The rotating shaft (11) is provided with a driven bevel gear (13) and a pushing member (14). The operating shaft (12) is internally provided with a rotatable shaft body (121). One end of the shaft body (121) is provided with a driving bevel gear (15) which meshes with the driven bevel gear (13). The pushing member (14) is provided with a transmission assembly (5) and is hinged to the connecting shaft (4). A blocking arc plate (6) is provided directly in front of the mounting flange (1). The operating shaft (12) is fixedly connected to the blocking arc plate (6). The shaft body (121) is provided with a driving rod (7). The driving rod (7) is provided with a bent extension part (71).

2. The open knife switch according to claim 1, characterized in that: The transmission assembly (5) includes a bearing plate (51), a screw rod (52), and a nut (53). One end of the screw rod (52) is hinged to the connecting shaft (4). The screw rod (52) passes through the bearing plate (51). Two nuts (53) are threadedly connected to the screw rod (52) and abut against both end faces of the bearing plate (51), so that the screw rod (52) is fixedly connected to the bearing plate (51). Both sides of the bearing plate (51) are provided with transmission parts (511). The transmission parts (511) are arranged between the blades (3). The operating shaft (12) passes through the transmission parts (511). A support rod (54) is provided between the transmission parts (511).

3. The open knife switch according to claim 1, characterized in that: The knife switch body (2) includes a plurality of support bases (21). The support bases (21) are provided with static contact frames (22) and contact head seats (23). The contact head seats (23) are provided with contact heads (231) for clamping the blades (3). An inclined guiding part (232) is provided at the entrance of the contact head (231).

4. The knife switch according to claim 3, wherein: The static contact frames (22) and the contact head seats (23) are provided with terminal connection parts (24). The terminal connection parts (24) are provided with a plurality of mounting holes (241).

5. The open knife switch according to claim 3, characterized in that: The support bases (21) are provided with brackets (25) which are arranged on both sides of the contact head seats (23). The brackets (25) are provided with a plurality of arc extinguishing grid pieces (26) which are located above the contact heads (231).

6. The knife-switch according to claim 3, wherein: One end of the blade (3) is hinged to the static contact frame (22).

7. The knife switch according to claim 1, wherein: The extension part (71) is provided with a handle sleeve (72).

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