CN201638780U - Drop type fuse - Google Patents
Drop type fuse Download PDFInfo
- Publication number
- CN201638780U CN201638780U CN200920351838XU CN200920351838U CN201638780U CN 201638780 U CN201638780 U CN 201638780U CN 200920351838X U CN200920351838X U CN 200920351838XU CN 200920351838 U CN200920351838 U CN 200920351838U CN 201638780 U CN201638780 U CN 201638780U
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- contact
- fixed
- fuse
- upper contact
- terminal
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Abstract
The utility model discloses a drop type fuse, which comprises a post insulator and an upper contact. The post insulator is provided with an upper fixing terminal and a lower fixing terminal, and the upper contact is fixed onto the upper fixing terminal. The upper contact comprises an inlet wire connecting portion, a fixing mounting portion, a spring sheet portion and a positioning portion; the fixing mounting portion extending from the tail end of the inlet wire connecting portion is perpendicular to the same; the spring sheet portion slantingly extends downwards from the tail end of the fixing mounting portion; and the positioning portion extends from the tail end of the spring sheet portion. A semicircular punching zone formed by upwards punching is arranged on the positioning portion, a semicircular positioning groove is formed by the punching zone at the bottom of the upper contact, and a semicircular positioning boss is formed on the top of the upper contact; three to six positioning contacts protruding towards the inside of the positioning groove are symmetrically distributed on the inner surface of the positioning groove; and a semicircular contact at the top end of a fuse tube is positioned inside the positioning groove and realizes electric connection via contact with the positioning contacts. The drop type fuse has the advantages of stable and reliable electric connection performance.
Description
Technical field
The utility model belongs to the fuse technical field, is specifically related to a kind of fuse switch.
Background technology
Fuse is a kind of protection equipment that the protection electric equipment was avoided the short circuit infringement.Its operation principle is when line short or overload, melt in the fuse fusing carrier is dissolved formation electric arc, and at the drop-down long arc of the effect of elastic body, high arc temperature makes the inner aerogenesis medium of fusing carrier resolve into gas simultaneously, in the fusing carrier pipe, set up very high pressure, free metal gas bleed pipe is made arc extinction outward, thereby cut-off short circuit current, fusing carrier falls under the effect of deadweight simultaneously, forms a visible isolation fracture.The history in existing more than 50 year of the development of China's fuse switch, in early days based on imitative Soviet Union product, the mid-1970s has improved many products from grinding, because of product material and design level are limit, manufacture level improves little, the later stage eighties increases along with introducing with exchange of technology, and product has had tremendous development, has possessed world standard substantially.Because the short circuit interruption ability of fuse improves constantly and good and economic, now accepted and be extensive use of by vast power consumer, nearly 2,000,000 of annual demand.
Fuse switch is one of the most frequently used electrical device of distribution system, also is the power product of distribution system use amount maximum.But because its unit value is lower, structure is simple relatively, all is some small-sized manufacturing firm processings basically in China, and product exists shortcomings such as break performance instability, through-current capability is low, the life-span is short, and is not solved well recent decades.
At present, no matter be domestic or external product, its fusion tube bottom rotating part (copper casting) all adopts the crimping of riveted joint spring leaf with linking of lower end conductor, this crimping mode, and not only contact area is little, also owing to each dispersiveness of closing a floodgate, many reasons such as elastic force reduction that metal fatigue causes, be very easy to cause its contact resistance to increase, the contact point heating, and can further follow the string after the spring leaf heating, cause contact resistance bigger, until burning.
The utility model content
The purpose of this utility model provides the comparatively good fuse switch of a kind of electrical connection properties.
The technical scheme that realizes the utility model purpose is: a kind of fuse switch, comprise the post insulator that is provided with fixed terminal and following fixed terminal, be fixed on the upper contact head on the fixed terminal, be fixed on down the fusing carrier support on the fixed terminal, be fixed on the following contact on the fusing carrier support, rotation is arranged on the gudgeon on the fusing carrier support, and the cartridge fuse that is connected with gudgeon is arranged on the semicircle contact on cartridge fuse top; The bottom of the fuse in the cartridge fuse is fixed on the described gudgeon; Described upper contact head comprise the inlet wire connecting portion, from described inlet wire connecting portion terminal extend and the fixed installation portion vertical with described inlet wire connecting portion, from described fixed installation portion end downwards diagonally extending shell fragment portion, from the terminal location division of extending of described shell fragment portion; Described location division is provided with the semicircle Stamping Area that upwards punching press forms, and described Stamping Area forms semicircular detent in the bottom of described upper contact head, forms semicircular positioning boss at the top of described upper contact head; Described detent inner surface is provided with three to six set feelers to the inner protrusion of detent of symmetrical distribution; The semicircle contact on described cartridge fuse top is positioned at described detent, and realizes being electrically connected by contacting with described set feeler.
In the technique scheme, described upper contact head is provided with the reinforcement that punching press forms from middle part to the described location division of shell fragment portion.
In the technique scheme, the inlet wire connecting portion of described upper contact head is provided with the inlet wire connecting hole, and the fixed installation portion of described upper contact head is provided with installing hole, and described installing hole is that a mid portion is that rectangle, two side portions are semicircular waist hole.
In the technique scheme, described down contact comprises two groups of elastic partss, and every group of elastic parts comprises that is used for a contact flat spring and a support shell fragment that is used to described contact flat spring that resiliency supported is provided that is electrically connected with gudgeon.
In the technique scheme, described contact flat spring comprise the installation portion that is used for fixing on the fusing carrier support and with the perpendicular elastic joint part of described installation portion, form
The basic configuration of shape; Described support shell fragment comprise the fixed part that is used for fixing on the fusing carrier support and with the perpendicular resiliency supported portion of described fixed part, form
The basic configuration of shape.
In the technique scheme, the elastic joint part end of described contact flat spring is provided with the connecting terminal of protrusion, and the resiliency supported portion end of described support shell fragment is provided with the support contact of protrusion.
In the technique scheme, the basic configuration of described connecting terminal is the strip boss, and the basic configuration of described support contact is semicircle or cylindrical boss.
In the technique scheme, the resiliency supported portion end of described support shell fragment withstands on the elastic joint part of described contact flat spring.
The utlity model has positive effect: in (1) the utility model, the end of described upper contact head is provided with Stamping Area,, described Stamping Area forms semicircular detent in the bottom of described upper contact head, forms semicircular positioning boss at the top of described upper contact head; Described detent inner surface is provided with three to six set feelers to the inner protrusion of detent of symmetrical distribution; The semicircle contact on described cartridge fuse top is positioned at described detent, and realizes being electrically connected by contacting with described set feeler.This structure makes the way of contact between cartridge fuse and the upper contact head be connected from a big way face to become local point and connect, thereby increases contact performance, specifically: the one, guarantee stability in contact, guarantee through-flow stability; The 2nd, improved the bonding strength between the two, improved the functional reliability of fuse.
(2) in the utility model, described down contact comprises two groups of elastic partss, and every group of elastic parts comprises that is used for a contact flat spring and a support shell fragment that is used to described contact flat spring that resiliency supported is provided that is electrically connected with gudgeon; This structure is owing to adopted the support shell fragment to be used to contact flat spring that resiliency supported is provided, effectively guarantee the contact stabilization between contact flat spring and the gudgeon, electrical connection properties under also promptly guaranteeing between contact and the gudgeon, thus guaranteed that fuse possesses stable break performance, through-current capability and useful life.In addition, described support shell fragment also has electric current and passes through as a conductor, so the utility model also has the advantage that improves through-current capability.
Description of drawings
Fig. 1 is a kind of perspective view of the present utility model;
Fig. 2 is a kind of perspective view of upper contact head in the fuse switch shown in Figure 1;
A kind of perspective view that Fig. 3 is a upper contact head shown in Figure 2 when another angle is observed;
Fig. 4 is the end view of upper contact head shown in Figure 2;
Fig. 5 in the fuse switch shown in Figure 1 down contact be fixed on a kind of perspective view on the fusing carrier support;
Fig. 6 is the half sectional view of Fig. 5;
Fig. 7 is a kind of perspective view when contact is in decomposing state down in the fuse switch shown in Figure 1;
The another kind of perspective view that Fig. 8 is Fig. 7 when another angle is observed.
Be labeled as shown in the accompanying drawing: post insulator 1, last fixed terminal 11, following fixed terminal 12, upper contact head 2, inlet wire connecting portion 21, inlet wire connecting hole 211, fixed installation portion 22, installing hole 221, shell fragment portion 23, location division 24, semicircle Stamping Area 25, detent 26, positioning boss 27, set feeler 28, reinforcement 29, input terminal 32 cut-offs guide hook 33, back-moving spring 34, outlet terminal 35, gudgeon 36, fuse turnover panel 37, torsion spring 38 carries molten sleeve pipe 39, fusing carrier support 4, following contact 5, elastic parts 51, contact flat spring 511, installation portion 5111, elastic joint part 5112, connecting terminal 5113 supports shell fragment 512, fixed part 5121, resiliency supported portion 5122, support contact 5123, cartridge fuse 6, fuse 62, rain cover 7, rivet 8.
Embodiment
(embodiment 1)
Fig. 1 to Fig. 8 has shown a kind of embodiment of the present utility model, and wherein Fig. 1 is a kind of perspective view of the present utility model; Fig. 2 is a kind of perspective view of upper contact head in the fuse switch shown in Figure 1; A kind of perspective view that Fig. 3 is a upper contact head shown in Figure 2 when another angle is observed; Fig. 4 is the end view of upper contact head shown in Figure 2; Fig. 5 in the fuse switch shown in Figure 1 down contact be fixed on a kind of perspective view on the fusing carrier support; Fig. 6 is the half sectional view of Fig. 5; Fig. 7 is a kind of perspective view when contact is in decomposing state down in the fuse switch shown in Figure 1; The another kind of perspective view that Fig. 8 is Fig. 7 when another angle is observed.
Present embodiment is a kind of fuse switch, see Fig. 1, comprise the post insulator 1 that is provided with fixed terminal 11 and following fixed terminal 12, be fixed on the upper contact head 2 on the fixed terminal 11, rain cover 7, the input terminal that is electrically connected with upper contact head 2 32 and cut-off guide hook 33, be arranged on upper contact head 2 back-moving springs 34 between upper contact head 2 and the rain cover 7, be fixed on down fusing carrier support 4 and outlet terminal 35 on the fixed terminal 12, be fixed on the following contact 5 on the fusing carrier support 4, rotation is arranged on the gudgeon 36 on the fusing carrier support 4, rotation is arranged on the fuse turnover panel 37 on the gudgeon 36 and the torsion spring 38 of reseting elasticity is provided for fuse turnover panel 37, be arranged on the molten sleeve pipe 39 that carries on the gudgeon 36, the bottom is arranged in the cartridge fuse 6 of described year molten sleeve pipe 39, is arranged on the semicircle contact on cartridge fuse 6 tops; The bottom of the fuse 62 in the cartridge fuse 6 is fixed on the described gudgeon 36.
See Fig. 2 to Fig. 4, described upper contact head 2 comprise inlet wire connecting portion 21, from described inlet wire connecting portion 21 terminal extend and the fixed installation portion 22 vertical with described inlet wire connecting portion 21, from described fixed installation portion 22 ends downwards diagonally extending shell fragment portion 23, from described shell fragment portion 23 terminal location divisions 24 of extending; Described location division 24 is provided with the semicircle Stamping Area 25 that upwards punching press forms, and described Stamping Area forms semicircular detent 26 in the bottom of described upper contact head 2, form semicircular positioning boss 27 at the top of described upper contact head 2; Described detent 26 inner surfaces are provided with three to six set feelers 28 to detent 26 inner protrusions of symmetrical distribution; Set feeler 28 in the present embodiment is the boss towards detent 26 inner three symmetrical distributions of protruding that form by impact style; The semicircle contact on described cartridge fuse 6 tops is positioned at described detent 26, and realizes being electrically connected by contacting with described set feeler 28.The inlet wire connecting portion 21 of described upper contact head 2 is provided with inlet wire connecting hole 211, and the fixed installation portion 22 of described upper contact head 2 is provided with installing hole 221, and described installing hole 221 is that a mid portion is that rectangle, two side portions are semicircular waist hole.
Described upper contact head 2 is provided with the reinforcement 29 that punching press forms from middle part to the described location division 24 of shell fragment portion 23, the reinforcement 29 in the present embodiment is two strip boss that form on upper contact head 2 lower surfaces by impact style.
See Fig. 5 to Fig. 8, described down contact 5 comprises two groups of elastic partss 51, and every group of elastic parts 51 comprises that is used for a contact flat spring 511 and a support shell fragment 512 that is used to described contact flat spring 511 that resiliency supported is provided that is electrically connected with gudgeon 36.Described contact flat spring 511 comprise the installation portion 5111 that is used for fixing on fusing carrier support 4 and with the perpendicular elastic joint part 5112 of described installation portion 5111, form
The basic configuration of shape; Described support shell fragment 512 comprise the fixed part 5121 that is used for fixing on fusing carrier support 4 and with the perpendicular resiliency supported portion 5122 of described fixed part 5121, form
The basic configuration of shape.
Be equipped with two riveted holes on described every group of elastic parts 51, and elastic parts 51 be fixed on the fusing carrier support 4 by two rivets 8.
Elastic joint part 5112 ends of described contact flat spring 511 are provided with the connecting terminal 5113 that protrudes towards near gudgeon 36 directions, and resiliency supported portion 5122 ends of described support shell fragment 512 are provided with the support contact of protruding towards described contact flat spring 5123.
The basic configuration of described connecting terminal 5113 is strip boss, and the basic configuration of described support contact 5123 is semicircle or cylindrical boss, and present embodiment is semicircle boss.Resiliency supported portion 5122 ends of described support shell fragment 512 withstand on the elastic joint part 5112 of described contact flat spring 511.
Present embodiment has positive effect: in (1) present embodiment, the end of described upper contact head is provided with Stamping Area,, described Stamping Area forms semicircular detent in the bottom of described upper contact head, forms semicircular positioning boss at the top of described upper contact head; Described detent inner surface is provided with three to six set feelers to the inner protrusion of detent of symmetrical distribution; The semicircle contact on described cartridge fuse top is positioned at described detent, and realizes being electrically connected by contacting with described set feeler.This structure makes the way of contact between cartridge fuse and the upper contact head be connected from a big way face to become local point and connect, thereby increases contact performance, specifically: the one, guarantee stability in contact, guarantee through-flow stability; The 2nd, improved the bonding strength between the two, improved the functional reliability of fuse.
(2) in the present embodiment, described down contact comprises two groups of elastic partss, and every group of elastic parts comprises that is used for a contact flat spring and a support shell fragment that is used to described contact flat spring that resiliency supported is provided that is electrically connected with gudgeon; This structure is owing to adopted the support shell fragment to be used to contact flat spring that resiliency supported is provided, effectively guarantee the contact stabilization between contact flat spring and the gudgeon, electrical connection properties under also promptly guaranteeing between contact and the gudgeon, thus guaranteed that fuse possesses stable break performance, through-current capability and useful life.In addition, described support shell fragment also has electric current and passes through as a conductor, so present embodiment also has the advantage that improves through-current capability.
Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that connotation of the present utility model extends out and still belong to protection range of the present utility model.
Claims (8)
1. fuse switch, comprise the post insulator (1) that is provided with fixed terminal (11) and following fixed terminal (12), be fixed on the upper contact head (2) on the fixed terminal (11), be fixed on down the fusing carrier support (4) on the fixed terminal (12), be fixed on the following contact (5) on the fusing carrier support (4), rotation is arranged on the gudgeon (36) on the fusing carrier support (4), is connected the cartridge fuse (6) of (36) with gudgeon, is arranged on the semicircle contact on cartridge fuse (6) top; The bottom of the fuse (62) in the cartridge fuse (6) is fixed on the described gudgeon (36); It is characterized in that: described upper contact head (2) comprise inlet wire connecting portion (21), from described inlet wire connecting portion (21) terminal extend and the fixed installation portion (22) vertical with described inlet wire connecting portion (21), from the shell fragment portion (23) of the terminal diagonally extending downwards of described fixed installation portion (22), from the terminal location division (24) of extending of described shell fragment portion (23); Described location division (24) is provided with the semicircle Stamping Area (25) that upwards punching press forms, described Stamping Area forms semicircular detent (26) in the bottom of described upper contact head (2), forms semicircular positioning boss (27) at the top of described upper contact head (2); Described detent (26) inner surface is provided with three to six set feelers (28) to the inner protrusion of detent (26) of symmetrical distribution; The semicircle contact on described cartridge fuse (6) top is positioned at described detent (26), and realizes being electrically connected by contacting with described set feeler (28).
2. fuse switch according to claim 1 is characterized in that: described upper contact head (2) is provided with the reinforcement (29) that punching press forms from middle part to the described location division (24) of shell fragment portion (23).
3. fuse switch according to claim 2, it is characterized in that: the inlet wire connecting portion (21) of described upper contact head (2) is provided with inlet wire connecting hole (211), the fixed installation portion (22) of described upper contact head (2) is provided with installing hole (221), and described installing hole (221) is that a mid portion is that rectangle, two side portions are semicircular waist hole.
4. fuse switch according to claim 1, it is characterized in that: described down contact (5) comprises two groups of elastic partss (51), and every group of elastic parts (51) comprises that is used for a contact flat spring (511) and a support shell fragment (512) that is used to described contact flat spring (511) that resiliency supported is provided that is electrically connected with gudgeon (36).
5. fuse switch according to claim 4 is characterized in that: described contact flat spring (511) comprise the installation portion (51) that is used for fixing on fusing carrier support (4) and with the perpendicular elastic joint part (5112) of described installation portion (5111), form
The basic configuration of shape;
Described support shell fragment (512) comprise the fixed part (5121) that is used for fixing on fusing carrier support (4) and with the perpendicular resiliency supported portion (5122) of described fixed part (5121), form
The basic configuration of shape.
6. fuse switch according to claim 5, it is characterized in that: elastic joint part (5112) end of described contact flat spring (511) is provided with the connecting terminal (5113) of protrusion, and resiliency supported portion (5122) end of described support shell fragment (512) is provided with the support contact (5123) of protrusion.
7. fuse switch according to claim 6 is characterized in that: the basic configuration of described connecting terminal (5113) is the strip boss, and the basic configuration of described support contact (5123) is semicircle or cylindrical boss.
8. fuse switch according to claim 7 is characterized in that: resiliency supported portion (5122) end of described support shell fragment (512) withstands on the elastic joint part (5112) of described contact flat spring (511).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920351838XU CN201638780U (en) | 2009-12-24 | 2009-12-24 | Drop type fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920351838XU CN201638780U (en) | 2009-12-24 | 2009-12-24 | Drop type fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201638780U true CN201638780U (en) | 2010-11-17 |
Family
ID=43083285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920351838XU Expired - Fee Related CN201638780U (en) | 2009-12-24 | 2009-12-24 | Drop type fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201638780U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576258A (en) * | 2014-12-30 | 2015-04-29 | 国家电网公司 | Self-energy-storage high-voltage drop blowout switch |
-
2009
- 2009-12-24 CN CN200920351838XU patent/CN201638780U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576258A (en) * | 2014-12-30 | 2015-04-29 | 国家电网公司 | Self-energy-storage high-voltage drop blowout switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20111224 |