CN203277180U

CN203277180U - Knife switch

Info

Publication number: CN203277180U
Application number: CN 201320274738
Authority: CN
Inventors: 雷日记; 丁周平
Original assignee: DONGHUA ELECTRIC STOCK Co Ltd OF ZHEJIANG
Current assignee: DONGHUA ELECTRIC STOCK Co Ltd OF ZHEJIANG
Priority date: 2013-05-17
Filing date: 2013-05-17
Publication date: 2013-11-06
Anticipated expiration: 2023-05-17

Abstract

The utility model discloses a knife switch which comprises a handle, a contact knife, a base, a contact knife bracket and contact knife holders. The contact knife holders comprise a movable contact knife holder and a static contact knife holder. An insulation protection board which is used for isolating the contact knife and the handle is fixedly arranged on one end of the contact knife. The other end of the contact knife is hinged with the contact knife bracket. The contact knife bracket is fixedly connected with the base. The base is provided with a grounding bar. The movable contact knife holder is fixed on the grounding bar. The base is provided with a casing. The contact knife bracket and the contact knife holders are placed in the casing. The knife switch provided by the utility model has the advantage of strong safety performance.

Description

Knife switch

Technical field

The utility model relates to a kind of circuit protection device, and more particularly, it relates to a kind of knife switch.

Background technology

Knife switch claims again knife switch or isolating switch, is a kind of manual distribution apparatus.It is the simplest in manual electrical equipment and use more a kind of low-voltage electrical apparatus, and it is comprised of porcelain seat, blade, tool rest and Bakelite Cover etc.Be typically used as the switch of insulating power supply, in order to can overhaul or change safely fuse to electric equipment.Also can be used as the mains switch of line-start motor.When selecting, the rated current of knife switch is approximately greater than three times of motor rated current, knife switch is mainly used to insulating power supply or manual connecting and disconnecting AC-DC Circuit, also can be used for not connecting frequently the load following with the disjunction rated current, according to the blade number what, knife switch divides one pole (hilted broadsword), bipolar (double-pole), three utmost points (three cuttves).In three utmost point knife switches and fuse is assembled in one cylinder iron or steel plate is made case shell, just be enclosed knife switch, there is handle the iron-clad side for console switch.

The effect of knife switch in circuit is: insulating power supply, to guarantee the safety of circuit and maintenance of equipment; The disjunction load is not as connecting continually and low-voltage circuit that breaking capacity is little or directly start small-capacity motor.Knife switch is with moving contact---plug-in strip, and by it with base on fixed contact---cutter holder seat phase wedging (or separation), with the connection (or disjunction) circuit a kind of switch.

At present, (application number is that 200610096026.6 Chinese patent discloses a kind of knife switch) on market, it comprises ceramic wafer (1), handle (2), contact knife (3), contact knife support (4), inlet wire connector assembly, outlet connector assembly and protective cover (5), its contact knife support (4) is structure as a whole with lug plate (6), by T font copper sheet with both wings in the same way mutually folding forms contact knife support (4), the centre of T font copper sheet vertically partly consists of lug plate (6); Described contact (9) is similarly integrative-structure with brace (8), also by T font copper sheet, both wings is rolled in the same way mutually to form contact (9), and the centre of T font copper sheet vertically part consists of lug plate (6).although this knife switch contact knife support (4) and lug plate (6), contact (9) is structure as a whole with brace (8), therefore there is not the problem of contact resistance, can adapt under large current conditions and work long hours, reduced simultaneously number of parts, make assembling convenient, but this knife switch considered himself the contact resistance problem, with and installation question, the security performance of but having ignored knife switch is also very important, only in some positions of knife switch, some insulating materials are set, to play certain protective effect although it is so, but or inadequate.Only have enough safe products, it is also more relieved that the client uses.

The utility model content

For the deficiency that prior art exists, the knife switch that provides a kind of security performance strong is provided the purpose of this utility model.

For achieving the above object, the utility model provides following technical scheme: a kind of knife switch, comprise handle, contact knife, base, contact knife support and contact knife holder, described contact knife holder comprises movable touch knife holder and quiescent contacting knife holder, described contact knife one end is fixed with the insulation protective board for isolation contact knife and handle, the contact knife other end and contact knife support are hinged, the contact knife support is fixedly connected on base, described base is provided with earthing strip, the movable touch knife holder is fixed on earthing strip, described base is provided with shell, and contact knife support and contact knife holder are placed in shell.

By adopting technique scheme, on the contact knife holder of plug-in strip, earthing strip is set, guarantee that each contact knife holder can be connected to earthing strip fully, make plug-in strip when "on" position, can guarantee to be in ground state, by be provided with shell on base, can further avoid occurring because of operation error accident, further improved the security performance of product.

The utility model further is set to: described contact knife holder is approximate Y shape or monolithic shape, and described contact knife can be monolithic or biplate.

By adopting technique scheme, by the shape of contact knife and the shape of contact knife holder are set, make the contact knife base of the corresponding Y shape of monolithic contact knife, the corresponding monolithic shape of biplate contact knife contact knife folder by two kinds of different cooperations, adapts to the requirement of different operational environments.

The utility model further is set to: described shell is provided with the groove that contact knife is moved, and shell comprises the first shell and second housing at least, the shell Detachable, and shell is fixedly connected on base.

By adopting technique scheme, shell can be dismantled and fill and close, and be provided with the groove that contact knife is moved, not affected by shell when making contact knife work, the shell employing is fixedly connected with mode and is fixed on base, can avoid mistake to touch and cause shell lose or drop, play good safeguard procedures.

Description of drawings

Fig. 1 is that the knife switch of the utility model embodiment is overlooked.

Fig. 2 is the knife switch end view of the utility model embodiment.

Reference numeral in figure: 1, insulation protective board; 2, handle; 3, contact knife; 4, earthing strip; 5, contact knife support; 6, base; 7, quiescent contacting knife holder; 8, shell; 9; , the movable touch knife holder.

Embodiment

Referring to figs. 1 through Fig. 2, the utility model embodiment is described further.

A kind of knife switch, comprise handle 2, contact knife 3, base 6, contact knife support 5 and contact knife holder, described contact knife holder comprises movable touch knife holder 9 and quiescent contacting knife holder 7, described contact knife 3 one ends are fixed with the insulation protective board 1 for isolation contact knife 3 and handle 2, contact knife 3 other ends and contact knife support 5 are hinged, contact knife support 5 is fixedly connected on base 6, described base 6 is provided with earthing strip 4, movable touch knife holder 7 is fixed on earthing strip 4, described base 6 is provided with shell 8, and contact knife support 5 and contact knife holder are placed in shell 8.Described shell 8 is provided with the groove that contact knife 3 is moved, and shell comprises the first shell and second housing at least, the shell Detachable, and shell 8 is fixedly connected on base 6.With shell 8, contact knife holder 5 is wrapped in inside, external connection is received on binding post on contact knife holder 7, move by the people and controlling handle 2, handle 2 is driving insulation protective board 1, insulation protective board 1 is driving contact knife 3, rotate in the groove of shell 8, contact knife 3 rotates to movable touch knife holder 9 from quiescent contacting knife holder 8, make contact knife 3 be in "on" position, when need of work cuts off the power supply, move joystick 2 by the people, handle 2 is driving insulation protective board 1, insulation protective board 1 is driving contact knife 3, from movable touch knife holder 9 to quiescent contacting knife holder 7, realizes separating brake.

Described contact knife holder is approximate Y shape or monolithic shape, and contact knife 3 can be monolithic or biplate.By to the different settings of the contact knife 3 in knife switch from the contact knife holder, Y shape contact knife holder is coordinated with monolithic contact knife 3, monolithic shape contact knife holder is coordinated with biplate contact knife 3, by different cooperation between two, 3 of contact knife holder and contact knifes can fully be coordinated, also can adopt other different form fit, adopt triangular form as contact knife 3, the contact knife holder adopts the shape adaptive with triangular form, but adopt these shapes, the contact effect is not fine, so the contact knife holder can be preferred embodiment for monolithic or biplate for approximate Y shape or monolithic shape and contact knife 3.

Because the utility model example has solved knife switch poor safety performance problem, improved security performance and the contact performance of product.

The above is only preferred embodiment of the present utility model, and in order to limit the utility model, those skilled in the art does not carry out common variation and replace should being included in protection range of the present utility model in the technical solutions of the utility model scope.

Claims

1. knife switch, comprise handle, contact knife, base, contact knife support and contact knife holder, described contact knife holder comprises movable touch knife holder and quiescent contacting knife holder, described contact knife one end is fixed with the insulation protective board for isolation contact knife and handle, and the contact knife other end and contact knife support are hinged, and the contact knife support is fixedly connected on base, it is characterized in that: described base is provided with earthing strip, the movable touch knife holder is fixed on earthing strip, and described base is provided with shell, and contact knife support and contact knife holder are placed in shell.

2. knife switch according to claim 1 is characterized in that: described contact knife holder is approximate Y shape or monolithic shape.

3. knife switch according to claim 1 and 2, it is characterized in that: described contact knife can be monolithic or biplate.

4. knife switch according to claim 3, described shell is provided with the groove that contact knife is moved, and shell comprises the first shell and second housing at least, the shell Detachable, shell is fixedly connected on base.