A knife switch
By setting a limit ring and a limit bump on the knife holder contact of the knife switch, the problem of unstable blade insertion position during the closing operation is solved, and the second channel saves material and achieves a more stable closing. gate operation and cost reduction effects.
Patent Information
- Application Number
- CN202210864041.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-07-21
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2042-07-21
AI Technical Summary
When the existing switch switch is closed, the insertion position of the blade is unstable due to excessive or too small force, and the contact piece of the knife clip contact will be opened to both sides after multiple insertion and removal, affecting the stability of contact. sex.
A knife switch equipped with a tool holder contact with a limiting function is designed. By setting a limit ring and a limit bump on the tool holder contact, the insertion depth of the handle is limited, and the side wall of the contact piece is Create a second channel to save material.
It effectively prevents the contact blades of the tool holder contacts from further opening to both sides during use, enhances the stability when closing, ensures the best contact state between the copper bar and the tool holder contacts, and reduces costs and weight.
Smart Images
Figure CN115172086B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of switches, and in particular to a knife switch. Background Art
[0002] The knife switch includes a base, a protective cover covered on the base, a handle, and a knife clamp contact group and a tool seat group arranged at intervals. The knife clamp contact group includes at least two knife clamp contacts arranged at intervals in the horizontal direction, and the tool seat group includes at least two tool seats arranged at intervals in the horizontal direction. The knife clamp contact is arranged corresponding to the tool seat. The handle includes a handle and a number of blades arranged corresponding to the tool seat, and a number of tool slots are provided on the protective cover corresponding to the blades. The knife switch is closed or opened by turning the handle and inserting or pulling out the blade into the knife clamp contact to complete the circuit switching. However, when performing the closing operation, the blade is often inserted into the knife clamp contact too shallowly or too deeply due to excessive or insufficient force, making the contact between the blade and the knife clamp contact unstable. At the same time, the two contact pieces on the knife clamp contact responsible for contacting the blade will often open to both sides after multiple insertions and extractions, and the gate between the two contact pieces will become larger and larger, affecting the stability of the contact. Summary of the invention
[0003] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a knife switch provided with a knife clamp contact with a limiting function.
[0004] The technical solution of the present invention is as follows: a knife switch, comprising a base, a protective cover arranged on the base, a handle, and a knife clamp contact group and a tool seat group arranged at intervals, the knife clamp contact group comprising at least two knife clamp contacts arranged at intervals in the transverse direction, the tool seat group comprising at least two tool seats arranged at intervals in the transverse direction, the knife clamp contact and the tool seat are arranged correspondingly, the handle comprises a handle and a plurality of blades arranged corresponding to the tool seat, a plurality of tool grooves are provided on the protective cover corresponding to the blades, each knife clamp contact and the lower part of the tool seat are provided with a gasket correspondingly, the gasket is made of iron material, the knife clamp contact comprises a bottom plate and two contact pieces arranged on the bottom plate and bent upward relative to each other, a gate for plugging and pulling out the handle is provided between the two contact pieces, a second through groove is provided on the side walls of the two contact pieces, a limiting ring with an opening is provided in the second through groove, the opening of the limiting ring abuts against the outer side surfaces of the two contact pieces, and at least one of the two contact pieces is bent inwardly to have a limiting protrusion for limiting the insertion depth of the handle.
[0005] With the above technical solution, the gasket is made of iron material, which increases the short-term tolerance of the knife switch, reduces the mass and reduces the cost. The opening of the limit ring contacts the outer sides of the contact piece, effectively preventing the contact piece of the knife clamp contact from further opening to both sides during use, enhancing the stability when closing the switch, ensuring the temperature rise, and the limit protrusion can limit the position of the handle when the knife switch is closed, so that when closing the switch, the handle is in the best position, ensuring that the best copper bar and the knife clamp contact are in the best contact state, and the side is provided with a through groove, saving the manufacturing material of the knife clamp contact and reducing the cost.
[0006] According to a further configuration of the present invention, a mounting platform is provided on the base corresponding to each tool holder contact and tool seat, two arc isolation plates a arranged at intervals in the longitudinal direction and a plurality of arc isolation plates b arranged at intervals in the transverse direction are provided in the protective cover, the two arc isolation plates a arranged at intervals in the longitudinal direction are located between the tool holder contact group and the tool seat group and respectively contact the side walls of the mounting platform, the plurality of arc isolation plates b arranged at intervals in the transverse direction are respectively located between two adjacent tool holder contacts and extend between the corresponding two tool seats, the two arc isolation plates a arranged at intervals in the longitudinal direction and the plurality of arc isolation plates b arranged at intervals in the transverse direction all contact the surface of the base to completely isolate each tool holder contact and the tool seat, a mounting column is provided on the arc isolation plate b, a mounting seat for inserting the mounting column is provided on the base, and a first through groove for the arc isolation plate b to pass through is provided on the mounting seat.
[0007] By adopting the above-mentioned further arrangement, each arc isolation plate a is combined with the arc isolation plate b to completely isolate each tool holder contact from each tool seat, which not only effectively isolates the arc of the knife but also increases the strength of the protective cover. In addition, the two longitudinally arranged arc isolation plates a are in contact with the side wall of the mounting table. During installation, the position of the protective cover is positioned, which is not easy to deviate and is more convenient to install.
[0008] A further configuration of the present invention: at least two first positioning holes are provided on the tool holder contact, and the first positioning holes are not in a straight line in the horizontal or vertical direction; at least two second positioning holes are provided on the tool seat, and the second positioning holes are not in a straight line in the horizontal or vertical direction; each mounting platform is provided with at least two first positioning columns or two second positioning columns, and the first positioning columns correspond one-to-one to the first positioning holes, and the second positioning columns correspond one-to-one to the second positioning holes; at least two third positioning holes are provided on the gasket, and when the front side of the gasket is facing upward, the third positioning hole corresponds one-to-one to the first positioning columns, and when the back side of the gasket is facing upward, the third positioning hole corresponds one-to-one to the second positioning columns.
[0009] With the above further configuration, when assembling the tool holder contact and the tool seat, the first positioning column and the second positioning column on the base can and can only be installed corresponding to the first positioning hole on the tool holder contact and the second positioning hole on the tool seat, respectively, ensuring that the tool holder contact and the tool seat can only be installed at a certain position and will not be installed incorrectly. Moreover, only one gasket needs to be used, and the third positioning hole opened therein can be made to correspond to the first positioning column or the second positioning column by turning it over, which is very convenient for installation.
[0010] The present invention is further configured as follows: the mounting platform is at least 4 mm higher than the base surface and is provided with a polygonal mounting groove and a fixing groove; the gasket, tool holder contact and tool seat are respectively provided with mounting holes and fixing holes corresponding to the polygonal mounting groove and the fixing groove; a hexagonal nut a is provided in the polygonal mounting groove; the mounting platform is also provided with a bolt a connecting the hexagonal nut a, the gasket and the tool holder contact or connecting the hexagonal nut a, the gasket and the tool seat; and a bolt b, one end of which is located in the fixing groove and the other end of which passes through the fixing hole to connect the mounting platform, the gasket and the tool holder contact or connect the mounting platform, the gasket and the tool seat.
[0011] Furthermore, a limiting groove is provided on the mounting platform, and the polygonal mounting groove, the first positioning column, the second positioning column, the fixing groove, and the gasket are all located in the limiting groove.
[0012] With the above further configuration, the mounting platform of the knife switch is more than 4 mm higher than the surface of the base, which increases the creepage distance between each tool seat and the knife clamp contact, effectively prevents creepage during use, and improves the safety of the operator. A polygonal mounting groove and a fixing groove are provided on the mounting platform, which saves materials and reduces costs without affecting the use effect of the knife switch. In addition, the polygonal mounting groove can fix the hexagonal nut a, making it more accurate and convenient when the bolt a passes through the mounting hole and is connected with the hexagonal nut a. One end of the bolt b is in the fixing groove, and the other end passes through the fixing hole to connect the base, gasket and the knife clamp contact or the tool seat, making the connection more stable. In addition, the limit groove can make the connected parts more stable and prevent rotation during the tightening of the hexagonal nut and the bolt.
[0013] The present invention is further configured as follows: a seating groove is provided on the handle, one end of the blade is hinged to the tool seat, and the other end is located in the seating groove and has a limiting hole, a hexagonal nut c is provided in the limiting hole, and the limiting hole limits the rotation of the hexagonal nut c, and a receiving groove is also provided on the handle, a bolt c is provided on the receiving groove, one end of the bolt c is located in the receiving groove, and the other end passes through the seating groove and is threadedly connected to the hexagonal nut c.
[0014] With the above further arrangement, during assembly, the hexagonal nut c is directly inserted into the limiting hole of the blade to keep it immobile, and then the bolt c is passed through the placement groove to connect the handle and the blade, which is easy to use and has a stable connection.
[0015] The present invention is further provided with plugs on both the fixing groove and the containing groove.
[0016] By adopting the above-mentioned further configuration, the interior of the fixing groove and the receiving groove can be kept clean, dust can be reduced, and the probability of creepage phenomenon occurring can be reduced.
[0017] The present invention is further provided with a knife switch installation direction mark on the base.
[0018] By adopting the above-mentioned further arrangement, the direction of the knife switch will not be wrong when it is installed.
[0019] The present invention is further provided that: the inserting end of the blade into the tool holder contact is arc-shaped.
[0020] By adopting the above further arrangement, it is easier to insert the blade between the two contact pieces of the knife holder contact, and the use of blade material is reduced, thereby reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the internal structure of the present invention when the switch is closed;
[0022] Figure 2 This is a schematic diagram of the internal structure of the present invention when the gate is opened;
[0023] Figure 3 It is a schematic diagram of the overall structure of the present invention;
[0024] Figure 4 It is a schematic diagram of the tool holder contact structure of the present invention;
[0025] Figure 5 It is a schematic diagram of the structure of the tool holder of the present invention;
[0026] Figure 6 It is a schematic diagram of the internal structure of the protective cover of the present invention;
[0027] Figure 7 The base structure of the present invention is shown in FIG. Figure 1 ;
[0028] Figure 8 The base structure of the present invention is shown in FIG. Figure 2 ;
[0029] Fig. 9 The handle structure of the present invention is shown in FIG. Figure 1 ;
[0030] Fig.10 The handle structure of the present invention is shown in FIG. Figure 2 ;
[0031] Fig.11 It is a schematic diagram of the gasket structure of the present invention;
[0032] In the figure:
[0033] 1. Base; 2. Protective cover; 3. Handle; 4. Gasket; 5. Tool holder contact group; 6. Tool seat group; 7. Limiting ring; 8. Plug; 11. Mounting table; 12. Mounting seat; 13. Direction mark; 21. Tool slot; 22. Arc isolation plate a; 23. Arc isolation plate b; 31. Handle; 32. Blade; 41. Third positioning hole; 42. Mounting hole; 43. Fixing hole; 51. Tool holder contact; 61. Tool seat; 111. First positioning column; 112. Second positioning column; 113. Polygonal mounting groove; 114, fixing groove; 115, bolt a; 116, bolt b; 117, limiting groove; 121, first through groove; 231, mounting column; 311, placement groove; 312, accommodating groove; 321, limiting hole; 511, first positioning hole; 512, bottom plate; 611, second positioning hole; 1131, hexagonal nut a; 3121, bolt c; 3211, hexagonal nut c; 5121, contact piece; 5122, second through groove; 5123, limiting protrusion. DETAILED DESCRIPTION
[0034] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0035] It should be noted that in the present invention, the descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.
[0036] In addition, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by those skilled in the art. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0037] like Figure 1-11As shown, a knife switch comprises a base 1, a protective cover 2 covered on the base 1, a handle 3, and a knife clamp contact group 5 and a tool seat group 6 arranged at intervals, wherein the knife clamp contact group 5 comprises at least two knife clamp contacts 51 arranged at intervals in the transverse direction, the tool seat group 6 comprises at least two tool seats 61 arranged at intervals in the transverse direction, the knife clamp contacts 51 are arranged correspondingly to the tool seats 61, the handle 3 comprises a handle 31 and a plurality of blades 32 arranged corresponding to the tool seats 61, a plurality of tool grooves 21 are opened on the protective cover 2 corresponding to the blades 32, and a gasket 4 is arranged correspondingly below each knife clamp contact 51 and the tool seat 61, and the gasket is made of iron material, so that The iron gasket 4 can increase the short-term tolerance when closing the switch. The knife clamp contact 51 includes a bottom plate 512 and two contact pieces 5121 that are relatively bent upward on the bottom plate 512. A gate for plugging and unplugging the handle 3 is provided between the two contact pieces 5121. The side walls of the two contact pieces 5121 are provided with second through grooves 5122. In this way, without affecting the use effect of the switch, the manufacturing material of the knife clamp contact 51 is saved, the cost is reduced, and the weight is reduced. A limiting ring 7 with an opening is provided in the second through groove 5122. The opening of the limiting ring 7 abuts against the outer side surfaces of the two contact pieces 5121. In this way, it is effectively prevented from The two contact pieces 5121 are stopped from opening to both sides when the blade 32 is inserted, thereby enhancing the stability when closing the switch and ensuring the temperature rise. At least one of the two contact pieces 5121 is bent inwardly to have a limiting protrusion 5123 for limiting the insertion depth of the handle 3. In this way, the depth of the blade 32 inserted into the knife clamp contact 51 when the knife switch is closed can be limited, so that the blade 32 and the knife clamp contact 51 are always in the best contact position when closing the switch; the base 1 is provided with a mounting table 11 corresponding to each knife clamp contact 51 and the tool seat 61, and the protective cover 2 is provided with two arc isolation plates a22 arranged at intervals in the longitudinal direction and a plurality of arc isolation plates b23 arranged at intervals in the transverse direction. The two arc isolation plates a22 and a plurality of arc isolation plates b23 arranged at intervals in the transverse direction are arranged in the protective cover 2. The arc-isolating plates a22 arranged in a longitudinal direction are located between the tool holder contact group 5 and the tool seat group 6 and respectively contact the side walls of the mounting platform 11. A plurality of arc-isolating plates b23 arranged in a transverse spaced manner are respectively located between two adjacent tool holder contacts 51 and extend between two corresponding tool seats 61. The two arc-isolating plates a22 arranged in a longitudinal direction and a plurality of arc-isolating plates b23 arranged in a transverse spaced manner all contact the surface of the base 1, completely isolating each tool holder contact 51 from the tool seat 61. The arc-isolating plates b23 are provided with mounting posts 231. The base 1 is provided with a mounting seat 12 in which the mounting posts 231 are inserted. The mounting seat 12 is provided with a first through slot 121 for the arc-isolating plates b23 to pass through.The tool holder contact 51 is provided with at least two first positioning holes 511, and the first positioning holes 511 are not in a straight line in the horizontal or vertical direction. The tool seat 61 is provided with at least two second positioning holes 611, and the second positioning holes 611 are not in a straight line in the horizontal or vertical direction. Each mounting platform 11 is provided with at least two first positioning columns 111 or two second positioning columns 112, and the first positioning columns 111 correspond to the first positioning holes 511 one by one, and the second positioning columns 112 correspond to the second positioning holes 611 one by one. The gasket 4 is provided with At least two third positioning holes 41, when the gasket 4 faces upward, the third positioning holes 41 correspond to the first positioning columns 111 one by one, and when the gasket 4 faces upward, the third positioning holes 41 correspond to the second positioning columns 112 one by one; the mounting platform 11 is at least 4 mm higher than the surface of the base 1 and is provided with a polygonal mounting groove 113 and a fixing groove 114, the gasket 4, the tool holder contact 51 and the tool seat 61 are respectively provided with mounting holes 42 and fixing holes 43 corresponding to the polygonal mounting groove 113 and the fixing groove 114, and the polygonal mounting groove 113 is provided with a hexagonal nut a113 1, the mounting platform 11 is also provided with a bolt a115 connecting the hexagonal nut a1131, the gasket 4 and the tool holder contact 51 or connecting the hexagonal nut a1131, the gasket 4 and the tool holder 61, and a bolt b116 with one end located in the fixing groove 114 and the other end passing through the fixing hole 43 to connect the mounting platform 11, the gasket 4 and the tool holder contact 51 or connecting the mounting platform 11, the gasket 4 and the tool holder 61; the mounting platform 11 is provided with a limiting groove 117, and the polygonal mounting groove 113, the first positioning column 111, the second positioning column 112, the fixing groove 114, the gasket 4 are all located in the fixing groove 114. In the limiting groove 117; the handle 31 is provided with a placement groove 311, one end of the blade 32 is hinged with the tool seat 61, and the other end is located in the placement groove 311 and has a limiting hole 321, and a hexagonal nut c3211 is provided in the limiting hole 321, and the limiting hole 321 limits the rotation of the hexagonal nut c3211. The handle 31 is also provided with a receiving groove 312, and a bolt c3121 is provided on the receiving groove 312, and one end of the bolt c3121 is located in the receiving groove 312 and the other end passes through the placement groove 311 and is threadedly connected with the hexagonal nut c3211. ;
[0038] When in use, first place the hexagonal nut a1131 into each polygonal mounting groove 113, wherein the polygonal mounting groove 113 can limit the circumferential rotation of the hexagonal nut a1131, then place the gasket 4 into the limiting groove 117 with the front side facing upward, and make the third positioning hole 41 correspond to the first positioning column 111 on the mounting platform 11 one by one, then make the first positioning hole 511 on the tool holder contact 51 correspond to the first positioning column 111 one by one and place the tool holder contact 51 on the gasket 4, and then pass the bolt a115 through the gasket 4 and the mounting hole 42 on the tool holder contact 51 Then it is threadedly connected with the hexagonal nut a1131, and the wire is fixed on the tool clamp contact 51; then the gasket 4 is turned over to the reverse side facing up and placed in the limiting groove 117, and the third positioning hole 41 is matched one by one with the second positioning column 112 on the mounting table 11, and then the second positioning hole 611 on the tool seat 61 is matched one by one with the second positioning column 112, and the tool seat 61 is placed on the gasket 4, and then the bolt a115 is passed through the gasket 4 and the mounting hole 42 on the tool seat 61 and then threadedly connected with the hexagonal nut a1131, and the wire is fixed on the tool seat 61. Then, one end of the bolt b116 is placed in the fixing groove 114, and the other end is passed through the fixing groove 114 on the mounting platform 11, the gasket 4 and the fixing hole 43 on the tool holder contact 51, so as to fix the mounting platform 11, the gasket 4 and the tool holder contact 51; then, one end of the bolt b116 is placed in the fixing groove 114, and the other end is passed through the fixing groove 114 on the mounting platform 11, the gasket 4 and the fixing hole 43 on the tool holder 61, so as to fix the mounting platform 11, the gasket 4 and the tool holder 61, so that the connection between the tool holder contact 51 and the tool holder 61 and the mounting platform is The connection is more stable, and then one end of the blade 32 is hinged to the tool seat 61, and then the hexagonal nut c3211 is inserted into the limiting hole 321 at the other end, so that the threaded hole is aligned with the receiving groove 312, and then one end of the bolt c3121 is placed in the receiving groove 312, and then the other end is passed through the placement groove 311 and threadedly connected with the hexagonal nut c3211, so as to fix the handle 31 and the blade 32, and then the protective cover 2 is covered on the base 1, and the blade 32 is aligned with the tool groove 21 on the protective cover 2, and finally, by turning the handle 3, the operation of closing or opening the knife is completed.
[0039] The bottom surfaces of the arc-isolating plate a22 and the b23 on the protective cover 2 are in contact with the surface of the base 1 and isolate the arrangement of each tool holder contact 51 and each tool seat 61, which can not only strengthen the strength of the protective cover 2, but also play an arc-isolating role for each tool holder contact 51 and each tool seat 61, and increase the creepage distance between the tool holder contact 51 and each tool seat 61, thereby increasing the safety of the switch. The arrangement of the mounting seat 12 with the first through slot 121 on the base 1 and the arc-isolating plate a22 respectively in contact with the side wall of the mounting platform 11 can better determine and fix the position of the protective cover 2 installed on the base 1, so that the protective cover 2 will not move after installation and is more stable.
[0040] Among them, the first positioning column 111 and the second positioning column 112 on the base 1 can and can only be installed corresponding to the first positioning hole 511 on the tool holder contact 51 and the second positioning hole 611 on the tool holder 61, respectively, ensuring that the tool holder contact 51 and the tool holder 61 can only be installed at a certain position and will not be installed incorrectly. In addition, only one gasket 4 needs to be used, and the third positioning hole 41 opened therein can be made to correspond to the first positioning column 111 or the second positioning column 112 by turning it over, so the installation is very convenient. Of course, the front and back sides of the gasket 4 are only relative to the first positioning column 111 and the second positioning column 112, and are not absolute front and side faces.
[0041] In this embodiment, plugs 8 are provided on the fixing groove 114 and the receiving groove 312, so that when in use, the interior of the fixing groove 114 and the receiving groove 312 can be kept clean, dust can be reduced, and the probability of creepage can be reduced.
[0042] In this embodiment, the base 1 is also provided with a knife installation direction mark 13, which makes installation convenient and can ensure the correct installation direction of the knife. The insertion end of the blade 32 inserted into the knife holder contact 51 is arc-shaped, so that the blade 32 can be more easily inserted between the two contact pieces 5122 of the knife holder contact 51, and the use of materials on the blade 32 is reduced, thereby reducing costs.
Claims
1. A knife switch, comprising a base, a protective cover covering the base, a handle, and a knife clamp contact group and a tool seat group arranged at intervals, wherein the knife clamp contact group comprises at least two knife clamp contacts arranged at intervals in the transverse direction, the tool seat group comprises at least two tool seats arranged at intervals in the transverse direction, the knife clamp contacts are arranged correspondingly to the tool seats, the handle comprises a grip and a plurality of blades arranged correspondingly to the tool seats, and the protective cover is provided with a plurality of tool grooves corresponding to the blades, characterized in that: The tool holder according to claim 1, wherein the two contact pieces are provided with a gasket under the tool holder, the gasket being made of an iron material, the tool holder contact comprising a bottom sheet and two contact pieces arranged on the bottom sheet and bent upwards relative to each other, a gate for plugging and pulling out the handle is provided between the two contact pieces, the side walls of the two contact pieces are provided with a second through groove, a limiting ring with an opening is provided in the second through groove, the opening of the limiting ring abuts against the outer side surfaces of the two contact pieces, at least one of the two contact pieces is bent inwardly to have a limiting protrusion for limiting the insertion depth of the handle, the base is provided with a mounting platform corresponding to each tool holder contact and tool holder, the protective cover is provided with two arc-isolating plates a arranged at intervals in the longitudinal direction and a plurality of arc-isolating plates b arranged at intervals in the transverse direction, the two arc-isolating plates a arranged at intervals in the longitudinal direction are located between the tool holder contact group and the tool holder group and respectively abut against the side walls of the mounting platform, the plurality of arc-isolating plates b arranged at intervals in the transverse direction are respectively located between two adjacent tool holder contacts and extend between the corresponding two tool seats, Two arc isolation plates a arranged at intervals in the longitudinal direction and several arc isolation plates b arranged at intervals in the transverse direction all contact with the surface of the base, completely isolating each tool holder contact from the tool seat, the arc isolation plate b is provided with a mounting column, the base is provided with a mounting seat for inserting the mounting column, the mounting seat is provided with a first through groove for the arc isolation plate b to pass through, at least two first positioning holes are provided on the tool holder contact, the first positioning holes are not in a straight line in the transverse or longitudinal direction, at least two second positioning holes are provided on the tool seat, the second positioning holes are not in a straight line in the transverse or longitudinal direction, each mounting platform is provided with at least two first positioning columns or two second positioning columns, the first positioning columns correspond one-to-one to the first positioning holes, the second positioning columns correspond one-to-one to the second positioning holes, the gasket is provided with at least two third positioning holes, when the front side of the gasket faces upward, the third positioning hole corresponds one-to-one to the first positioning column, and when the back side of the gasket faces upward, the third positioning hole corresponds one-to-one to the second positioning column.
2. A knife switch according to claim 1, characterized in that: The mounting platform is at least 4 mm higher than the base surface and is provided with a polygonal mounting groove and a fixing groove. The gasket, tool holder contact and tool seat are respectively provided with mounting holes and fixing holes corresponding to the polygonal mounting groove and the fixing groove. A hexagonal nut a is provided in the polygonal mounting groove. The mounting platform is also provided with a bolt a connecting the hexagonal nut a, the gasket and the tool holder contact or connecting the hexagonal nut a, the gasket and the tool seat, and a bolt b with one end located in the fixing groove and the other end passing through the fixing hole to connect the mounting platform, the gasket and the tool holder contact or connecting the mounting platform, the gasket and the tool seat.
3. A knife switch according to claim 2, characterized in that: The mounting platform is provided with a limiting groove, and the polygonal mounting groove, the first positioning column, the second positioning column, the fixing groove and the gasket are all located in the limiting groove.
4. A knife switch according to claim 3, characterized in that: The handle is provided with a seating groove, one end of the blade is hinged to the tool seat, and the other end is located in the seating groove and has a limiting hole. A hexagonal nut is provided in the limiting hole, and the limiting hole limits the rotation of the hexagonal nut. The handle is also provided with a receiving groove, and a bolt c is provided on the receiving groove. One end of the bolt c is located in the receiving groove, and the other end passes through the seating groove and is threadedly connected to the hexagonal nut c.
5. A knife switch according to claim 4, characterized in that: The fixing groove and the containing groove are both provided with plugs.
6. A knife switch according to claim 5, characterized in that: The base is also provided with a marking for the installation direction of the switch.
7. A knife switch according to claim 6, characterized in that: The inserting end of the blade inserted into the tool holder contact is arc-shaped.
Citation Information
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