CN-113948353-B - Pull-type fuse

CN113948353BCN 113948353 BCN113948353 BCN 113948353BCN-113948353-B

Abstract

The invention discloses a drawing type fuse which comprises a shell, an operating handle, a fuse body and electrode assemblies, wherein a fuse fixing cavity which is used for installing the fuse body and extends transversely is formed in the middle of the operating handle, the fuse body is detachably and elastically embedded in the fuse fixing cavity, a handle mounting groove which is used for accommodating the operating handle is formed in the shell, the operating handle can be limited and rotationally and is slidably connected in the handle mounting groove, two groups of electrode assemblies are symmetrically and fixedly arranged on the left side and the right side of the handle mounting groove, the two groups of electrode assemblies are respectively and releasably clamped and fixed with the left end and the right end of the fuse body, wiring ports corresponding to the positions of the electrode assemblies are respectively formed in the left side and the right side of the shell, a wire penetrates through the wiring ports and is connected with the electrode assemblies, and the bottom of the shell is releasably clamped and fixed on a guide rail. The drawing type fuse provided by the invention has the advantages that the replacement of the fuse core is quick and convenient, the electric shock risk is avoided, the drawing type fuse is safe and reliable, and the installation and the disassembly of the shell and the guide rail are more convenient.

Inventors

YE LINQING
WEN ZHENGBIN
WEN CHAOYU

Assignees

温州圣峻电气有限公司
温州圣峻电气有限公司

Dates

Publication Date: 20260421
Application Date: 20200717
Priority Date: 20200717

Claims (9)

1. The drawing type fuse is characterized by comprising a shell, an operating handle, a fuse core body and an electrode assembly, wherein a fuse core fixing cavity which is used for installing the fuse core body and extends transversely is formed in the middle of the operating handle, the fuse core body is detachably and elastically embedded in the fuse core fixing cavity, a handle mounting groove which is used for accommodating the operating handle is formed in the shell, the operating handle can be vertically and reciprocally drawn and connected in the handle mounting groove, the middle lower part of the operating handle can be longitudinally and limitedly and rotatably connected to the upper part of the handle mounting groove, the front side and the rear side of the lower end of the operating handle are respectively and releasably abutted against the inner wall of the upper part of the shell, two groups of electrode assemblies are symmetrically and fixedly arranged on the left side and the right side of the handle mounting groove, the two groups of electrode assemblies are respectively and releasably clamped and fixed with the left end and the right end of the fuse core body, the left side and the right side of the shell are respectively provided with wiring ports corresponding to the positions of the electrode assemblies, wires are arranged in the wiring ports and correspondingly clamped and connected to the bottom of the shell, and the electrode assemblies can be releasably clamped and fixed on the bottom of the shell; limiting pins are arranged on the left side and the right side of the upper part of the operating handle, handle sliding grooves extending up and down are formed in the inner walls on the left side and the right side of the handle mounting groove, the two limiting pins of the operating handle are respectively connected in the handle sliding grooves corresponding to the positions in a sliding mode, and the upper end and the lower end of the handle sliding grooves are respectively in an arc shape, so that the operating handle can swing in the front-rear direction after being pulled out; The middle part of operating handle lower extreme is equipped with the guide block, the front and back bilateral symmetry of handle mounting groove is equipped with the guide slot, the front and back both sides of guide block respectively sliding connection in the position is corresponding in the guide slot, the thickness of guide block gradually increases from top to bottom earlier to the guide block middle part back reduces gradually, the edge of the front and back both sides of the longitudinal section of upper portion and middle part of guide block is the pitch arc, the edge of the front and back both sides of the longitudinal section of lower part of guide block is the straight line.
2. The pull-type fuse of claim 1, wherein a clamping groove is formed in the left end of the fuse core fixing cavity, the left end of the fuse core body is detachably and fixedly clamped into the clamping groove, an elastic clamping assembly is arranged at the right end of the fuse core fixing cavity and comprises an upper elastic clamping piece and a lower elastic clamping piece, the right end of the fuse core body is detachably clamped between the upper elastic clamping piece and the lower elastic clamping piece, and the lower surface of the upper elastic clamping piece and the upper surface of the lower elastic clamping piece are respectively and releasably elastically abutted to the right end of the fuse core body.
3. The pull-out fuse of claim 2 wherein the longitudinal section of the upper resilient clip is U-shaped with a forward opening, the lower side wall of the upper resilient clip is inclined from top to bottom from back to front, the longitudinal section of the lower resilient clip is U-shaped with a rearward opening, the upper side wall of the lower resilient clip is inclined from bottom to top from front to back, and the lower side wall of the upper resilient clip and the upper side wall of the lower resilient clip are respectively releasably resiliently biased against the right end of the fuse body.
4. The pull-out fuse of claim 1, wherein the electrode assembly comprises an electrode plate, a wire frame, a wire lug and screws, wherein the electrode plate and the wire frame are fixedly arranged in the shell, the electrode plate comprises an integrally formed U-shaped elastic sheet positioned on the inner side and a wire guide plate positioned on the outer side, the fuse core body is embedded in the U-shaped elastic sheet, the front side and the rear side of the fuse core body are respectively in releasable abutting joint with the inner wall of the U-shaped elastic sheet, the longitudinal section of the wire frame is in an 'opening' shape, the longitudinal section of the wire lug is in a '匚' shape, the wire guide plate is arranged in the wire frame in a penetrating manner from inside to outside, the lower side wall of the wire lug is arranged in the wire frame in a penetrating manner and is positioned above the wire guide plate, a threaded hole is formed in the upper side wall of the wire lug, the screw is arranged in the threaded hole in a penetrating manner and is in threaded connection with the upper side wall of the wire guide plate, and the lower end of the screw is in abutting joint with the upper side wall of the wire lug, and the lower end of the wire guide plate is in a releasable manner.
5. The pull-out fuse of claim 4, wherein a clamping spring is sleeved outside the U-shaped elastic piece, the inner wall of the clamping spring is in clamping elastic abutment with the outer wall of the U-shaped elastic piece, the bottom of the clamping spring is in abutting abutment with the bottom of the shell, and the lower part of the outer wall of the clamping spring is in abutting abutment with the inner wall of the shell.
6. A pull-out fuse of claim 5 wherein said clamp spring comprises an integrally formed spring body having a U-shaped longitudinal cross section and two laterally extending clamp arms disposed at front and rear ends of said spring body top, said left clamp spring having two clamp arms extending from left to right from front and rear ends of said spring body top corresponding in position, said right clamp spring having two clamp arms extending from right to left from front and rear ends of said spring body top corresponding in position, said spring body having a bottom portion abutting against said bottom portion of said housing, said spring body inner wall, said front clamp arm rear side and said rear clamp arm front side elastically abutting against said U-shaped spring plate outer wall, respectively.
7. The pull-out fuse of claim 4, wherein two electrode mounting grooves for accommodating the electrode assembly are formed in the housing, the two electrode mounting grooves are symmetrically formed in the left side and the right side of the handle mounting groove, the wire frames are respectively fixedly embedded in the electrode mounting grooves corresponding to the positions, the wire lugs can be vertically and slidably arranged in the electrode mounting grooves corresponding to the positions in a penetrating mode, the outer surfaces of the wire lugs are in sliding contact with the inner walls of the electrode mounting grooves, and the wire guide plates are arranged between the handle mounting grooves and the electrode mounting grooves in a penetrating mode.
8. The pull-out fuse of any one of claims 1-7, wherein a first fixing block and a second fixing block are respectively arranged on the left side and the right side of the bottom of the housing, the guide rail is arranged between the first fixing block and the second fixing block, the left side of the guide rail abuts against the right side of the first fixing block, the right side of the guide rail abuts against the right side of the second fixing block and is fixed through a mounting clamping plate in a clamping manner, a mounting groove for the mounting clamping plate to slide back and forth along the left direction is formed in the second fixing block, a first sliding groove is formed in the groove wall on the front side and the rear side of the mounting clamping plate, a first sliding block is symmetrically arranged on the front side and the rear side of the mounting clamping plate and is in limiting sliding connection with the first sliding groove, an upward protruding elastic clamping block is arranged in the center of the right part of the mounting clamping plate, a downward protruding limiting block is fixedly arranged on the top of the mounting groove, the elastic clamping block is elastically clamped with the limiting block, and the left end of the mounting clamping plate abuts against the mounting clamping plate in a releasing manner.
9. The pull-out fuse of claim 8, wherein second sliding blocks are symmetrically arranged on the front side and the rear side of the left part of the mounting clamping plate, the second sliding blocks are arranged above the first sliding blocks in parallel, second sliding grooves are formed in groove walls on the front side and the rear side of the left part of the mounting groove, the second sliding grooves are arranged above the first sliding grooves in parallel, and the second sliding blocks are in limiting sliding connection in the second sliding grooves.

Description

Pull-type fuse Technical Field The present invention relates to a fuse, and more particularly, to a pull fuse. Background When the current exceeds a specified value, the fuse core is fused by heat generated by the fuse core to break a container of a circuit, the fuse comprises a shell, the fuse core in the shell and other electric elements, and the fuse core is electrically connected with the other electric elements to realize the normal working state of the fuse. Under the condition of long-term operation of the fuse, the fuse core is easy to damage, and the fuse core needs to be replaced after being damaged. Common fuse in market need take apart the casing when changing the core, take out the damaged core in the casing again, and it is very inconvenient to change, wastes time and energy. In addition, when the handle is pulled out to replace the melting core, the handle is easy to shake, and when the melting core is replaced, the risk of touching peripheral parts exists, so that potential safety hazards exist. Disclosure of Invention The invention aims to solve the defects in the prior art, and the invention aims to provide the drawing type fuse, so that the replacement of a fuse core is quick and convenient, the risk of electric shock is avoided, the safety and reliability are realized, and the installation and the disassembly of a shell and a guide rail of the fuse are more convenient. The invention discloses a drawing type fuse which comprises a shell, an operating handle, a fuse core body and an electrode assembly, wherein a fuse core fixing cavity which is used for installing the fuse core body and extends transversely is formed in the middle of the operating handle, the fuse core body is detachably and elastically embedded in the fuse core fixing cavity, a handle mounting groove which is used for accommodating the operating handle is formed in the shell, the operating handle can be vertically and reciprocally drawn and connected in the handle mounting groove, the middle lower part of the operating handle can be longitudinally and limitedly and rotatably connected to the upper part of the handle mounting groove, the front side and the rear side of the lower end of the operating handle are respectively and releasably abutted against the inner wall of the upper part of the shell, two groups of electrode assemblies are symmetrically and fixedly arranged on the left side and the right side of the handle mounting groove, the two groups of electrode assemblies are respectively and releasably clamped and fixed with the left end and the right end of the fuse core body, the left side and the right side of the shell are respectively provided with a wire connection opening corresponding to the position of the electrode assembly, the wire is arranged in the wire connection opening, and the wire connection opening is correspondingly connected with the electrode assembly in a clamping manner, and the bottom of the electrode assembly is releasably clamped on the guide rail. The pull type fuse of the present invention may further be: The left end of the melting core fixing cavity is provided with a clamping groove, the left end part of the melting core body is detachably and fixedly connected into the clamping groove, the right end of the melting core fixing cavity is provided with an elastic clamping assembly, the elastic clamping assembly comprises an upper elastic clamping piece and a lower elastic clamping piece, the right end of the melting core body is detachably clamped between the upper elastic clamping piece and the lower elastic clamping piece, and the lower surface of the upper elastic clamping piece and the upper surface of the lower elastic clamping piece are respectively and elastically offset with the right end of the melting core body in a releasable mode. The longitudinal section of the upper elastic clamping piece is in a U-like shape with a forward opening, the lower side wall of the upper elastic clamping piece is obliquely arranged from top to bottom from back to front, the longitudinal section of the lower elastic clamping piece is in a U-like shape with a backward opening, the upper side wall of the lower elastic clamping piece is obliquely arranged from bottom to top from front to back, and the lower side wall of the upper elastic clamping piece and the upper side wall of the lower elastic clamping piece are respectively and releasably elastically propped against the right end of the melting core body. The electrode assembly comprises an electrode plate, a wire connecting frame, a wire connecting plate and screws, wherein the electrode plate and the wire connecting frame are fixedly arranged in the shell, the electrode plate comprises an integrally formed U-shaped elastic sheet positioned on the inner side and a wire guide plate positioned on the outer side, the melting core body is embedded in the U-shaped elastic sheet, the front side and the rear side of the melting core body are respective