Assembled knife switch

Abstract

An assembled knife switch comprises a mounting base, assembling holes are formed in four corners of the mounting base, a mounting seat and a knife holder seat are arranged on the mounting base in a bolt connection mode, a knife switch is arranged on the mounting seat, and on-off of a circuit is achieved through wedging or separating of the knife switch and the knife holder seat. And an arc extinguishing cover is arranged on the tool holder seat. Through the arrangement of the arc extinguishing cover on the knife holder seat, when the knife switch is separated from the knife holder seat, electric arcs generated when the knife switch is disconnected from the knife holder seat can be eliminated, the effect of protecting the switch is achieved, in addition, parts of the device are connected through bolts, and assembly is convenient.

Description

Technical Field

[0001] The utility model relates to a knife-switch, in particular to an assembled knife-switch. Background Art

[0002] A knife-switch is a commonly used manual switch in electrical equipment. The knife-switch is mainly used in low-voltage circuits. Its function is to connect and disconnect AC and DC circuits, and can also be used to connect and disconnect loads below the rated current infrequently, such as small motors and electric furnace equipment.

[0003] Currently, the existing knife-switch only has the function of circuit connection and disconnection, but lacks an arc extinguishing design. When the existing knife-switch disconnects the circuit instantaneously, an electric arc will be generated. If the electric arc cannot be quickly eliminated, it will cause an arc short circuit, resulting in equipment failure, affecting the equipment life or burning out devices and causing accidents.

[0004] Therefore, there is an urgent need to provide an assembled knife-switch with an arc extinguishing design. Summary of the Utility Model

[0005] In order to overcome the defect that the existing knife-switch lacks an arc extinguishing design and cannot quickly eliminate the electric arc when the circuit is disconnected, resulting in an arc short circuit, equipment failure, affecting the equipment life or burning out devices and causing accidents, the utility model provides an assembled knife-switch with an arc extinguishing design.

[0006] To achieve the above problems, the utility model adopts the following technical solutions: An assembled knife-switch includes an installation base. Assembly holes are provided at the four corners of the installation base. An installation seat and a knife clip seat are arranged on the installation base by means of bolt connection. A knife-switch is arranged on the installation seat. The circuit is connected and disconnected by the engagement or separation of the knife-switch and the knife clip seat. An arc extinguishing cover is arranged on the knife clip seat for eliminating the electric arc generated when the knife-switch and the knife clip seat are disconnected.

[0007] Furthermore, two positioning plates are arranged on the installation base by means of bolt connection on both sides of the knife clip seat respectively. An adjusting frame is fixedly connected to the positioning plate. A positioning rod is slidably arranged on the adjusting frame. The positioning rod is used to fix the arc extinguishing cover. A first elastic member is sleeved on the positioning rod for assisting the positioning rod to reset.

[0008] Furthermore, a positioning frame is arranged on the installation base by means of bolt connection. A first guiding rod is fixedly connected to the positioning frame. A clamping plate is slidably arranged on the first guiding rod. When the knife-switch and the knife clip seat are in a wedged state, the clamping plate can be used to clamp the knife-switch. A second elastic member for resetting the clamping plate is sleeved on the first guiding rod.

[0009] Furthermore, a slope is provided at the top of the clamping plate.

[0010] Furthermore, a guide plate is fixedly connected to the mounting base. A push rod is slidably arranged on the guide plate. The push rod can be in contact and cooperation with the clamping plate. A second guide rod is fixedly connected inside the guide plate. The second guide rod is used to guide the push rod. A third elastic member for resetting the push rod is sleeved on the second guide rod.

[0011] Furthermore, an insulating pad is arranged on the surface of the clamping plate that contacts the knife switch.

[0012] Furthermore, a warning card is arranged on the mounting base.

[0013] Compared with the prior art, the utility model has the following technical effects: 1. Through the setting of the arc extinguishing cover on the knife clip seat, when the knife switch is separated from the knife clip seat, the arc generated when the knife switch and the knife clip seat are disconnected can be eliminated, playing a role in protecting the switch. In addition, all parts of this device are connected by bolts, which is convenient for assembly.

[0014] 2. By using the positioning rod to clamp and fix the arc extinguishing cover, the arc extinguishing cover is prevented from falling off during the use of the switch.

[0015] 3. When the knife switch and the knife clip seat are wedged, the clamping plate clamps the knife switch to prevent the knife switch from disengaging from the knife clip seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 is a three-dimensional sectional structural schematic diagram of the mounting seat, knife switch and arc extinguishing cover of the utility model.

[0018] Figure 3 is a three-dimensional structural schematic diagram of the positioning plate, adjusting frame and positioning rod of the utility model.

[0019] Figure 4 is a three-dimensional structural schematic diagram of the arc extinguishing cover of the utility model.

[0020] Figure 5 is a covering diagram of the mounting base, clamping plate and positioning frame of the utility model.

[0021] Figure 6 is a three-dimensional sectional structural schematic diagram of the mounting base, guide plate and warning card of the utility model.

[0022] Figure 7 is a three-dimensional sectional structural schematic diagram of the push rod and guide plate of the utility model.

[0023] Among them, the above-mentioned drawings include the following reference numerals: 1. mounting base, 2. mounting seat, 3. knife switch, 4. knife clip seat, 5. assembly hole, 6. arc extinguishing cover, 7. positioning plate, 8. adjusting frame, 9. positioning rod, 10. first elastic member, 11. positioning frame, 12. clamping plate, 13. first guide rod, 14. second elastic member, 15. guide plate, 16. push rod, 17. second guide rod, 18. third elastic member, 19. insulating pad, 20. warning card. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1 , Figure 2 and Figure 4 , an assembled knife switch, including a mounting base 1, assembly holes 5 are provided at the four corners of the mounting base 1, the mounting seat 2 and the knife clip seat 4 are arranged on the top of the mounting base 1 by means of bolt connection. The design of bolt connection for the parts of this device enables convenient assembly. A knife switch 3 is arranged on the mounting seat 2, and the on-off of the circuit is realized by the wedging or separation of the knife switch 3 and the knife clip seat 4. An arc extinguishing cover 6 is arranged on the knife clip seat 4. The arc extinguishing cover 6 is composed of a cover body and five arc extinguishing grid sheets. When an arc is generated by the disconnection of the knife switch 3 and the knife clip seat 4, under the action of the contraction force of the magnetic lines of force, the arc is drawn into the arc extinguishing grid sheets of the arc extinguishing cover 6. Since there are gaps between each arc extinguishing grid sheet, the arc will be divided into multiple short arcs after entering. When the alternating current passes through zero, all the short arcs will be extinguished. At the same time, the arc extinguishing grid sheets dissipate heat, and the arc is quickly cooled, thereby achieving the arc extinguishing effect. A warning card 20 is arranged on the mounting base 1, which is used to visually present device information and play a warning role.

[0026] Please refer to Figure 3 , two positioning plates 7 are arranged on the top of the mounting base 1 by means of bolt connection and are respectively located on the left and right sides of the knife clip seat 4. An adjusting frame 8 is fixedly connected to the middle of the positioning plate 7 by welding. A positioning rod 9 is slidably arranged on the adjusting frame 8. The positioning rod 9 is used to fix the arc extinguishing cover 6 to prevent the arc extinguishing cover 6 from falling off during the use of the switch. A first elastic member 10 is sleeved on the positioning rod 9, and both ends of the first elastic member 10 are connected to the positioning rod 9 and the positioning plate 7 respectively, which is used to assist the positioning rod 9 to reset.

[0027] Please refer to Figure 5, two positioning frames 11 distributed symmetrically left and right are arranged on the top of the mounting base 1 by means of bolt connection. A first guide rod 13 is fixedly connected to the middle of the positioning frame 11 by means of welding. A clamping plate 12 is slidably arranged on the first guide rod 13. When the knife switch 3 and the knife clip seat 4 are in a wedged state, the clamping plate 12 can be used to clamp the knife switch 3 to prevent the knife switch 3 from disengaging from the knife clip seat 4. And a slope is arranged at the top of the clamping plate 12, which can extrude the clamping plate 12 to move outwards under the action of the slope when the knife switch 3 is reset, without the need for the user to manually pull the clamping plate 12. A second elastic member 14 for resetting the clamping plate 12 is sleeved on the first guide rod 13. Two ends of the second elastic member 14 are respectively connected to the clamping plate 12 and the positioning frame 11. An insulating pad 19 is arranged on the surface of the clamping plate 12 in contact with the knife switch 3, which plays an insulating role to avoid the current transfer on the knife switch 3.

[0028] Please refer to Figure 6 and Figure 7 , a guide plate 15 is fixedly connected to the middle position of the top of the mounting base 1. A push rod 16 is slidably arranged on the guide plate 15. The push rod 16 can be in contact and cooperate with the clamping plate 12. By pushing the push rod 16 forward, the two clamping plates can be extruded to move outwards simultaneously to create a moving space for the knife switch 3, which is convenient for use. A second guide rod 17 is fixedly connected inside the guide plate 15. The second guide rod 17 is used to guide the push rod 16 to ensure the stable movement of the push rod 16. A third elastic member 18 for resetting the push rod 16 is sleeved on the second guide rod 17. Two ends of the third elastic member 18 are respectively connected to the push rod 16 and the guide plate 15.

[0029] The above embodiments are only the preferred embodiments of the present invention, and are not used to limit the scope of implementation of the present invention. Therefore, all equivalent changes made according to the content of the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An assembled knife switch, comprising a mounting base (1), wherein the mounting base (1) is provided with assembly holes (5) at four corners, the mounting base (1) is provided with a mounting seat (2) and a knife clamp seat (4) by bolt connection, the mounting seat (2) is provided with a knife switch (3), and the circuit is switched on and off by wedging or separating the knife switch (3) and the knife clamp seat (4), characterized in that: The tool holder seat (4) is provided with an arc extinguishing cover (6) for eliminating the arc generated when the knife switch (3) is disconnected from the tool holder seat (4).

2. The assembled knife switch according to claim 1, characterized in that: The mounting base (1) is provided with two positioning plates (7) respectively located on both sides of the tool holder seat (4) by means of bolt connection, the positioning plates (7) are fixedly connected with an adjustment frame (8), a positioning rod (9) is slidably provided on the adjustment frame (8), the positioning rod (9) is used to fix the arc extinguishing cover (6), and a first elastic member (10) is sleeved on the positioning rod (9) for assisting the positioning rod (9) in resetting.

3. The assembled knife switch according to claim 1, characterized in that: A positioning frame (11) is provided on the mounting base (1) by means of bolt connection, a first guide rod (13) is fixedly connected to the positioning frame (11), a clamping plate (12) is slidably provided on the first guide rod (13), the clamping plate (12) can be used to clamp the knife gate (3) when the knife gate (3) and the knife clamp seat (4) are in a wedged state, and a second elastic member (14) is sleeved on the first guide rod (13) for resetting the clamping plate (12).

4. The assembled knife switch according to claim 3, characterized in that: The top of the clamping plate (12) is provided with an inclined surface.

5. The assembled knife switch according to claim 3, characterized in that: A guide plate (15) is fixedly connected to the mounting base (1), a push rod (16) is slidably arranged on the guide plate (15), the push rod (16) can be in contact with the clamping plate (12), a second guide rod (17) is fixedly connected to the guide plate (15), the second guide rod (17) is used to guide the push rod (16), and a third elastic member (18) is sleeved on the second guide rod (17) for resetting the push rod (16).

6. The assembled knife switch according to claim 3, characterized in that: An insulating pad (19) is provided on the side of the clamping plate (12) that contacts the knife switch (3).

7. The assembled knife switch according to claim 1, characterized in that: A warning card (20) is arranged on the installation base (1).

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