CN104319146A - Single breakpoint quick-action assistant switch - Google Patents
Single breakpoint quick-action assistant switch Download PDFInfo
- Publication number
- CN104319146A CN104319146A CN201410531238.7A CN201410531238A CN104319146A CN 104319146 A CN104319146 A CN 104319146A CN 201410531238 A CN201410531238 A CN 201410531238A CN 104319146 A CN104319146 A CN 104319146A
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- contact
- movable contact
- spring
- moving
- block
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/08—Bases; Stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/64—Encased switches adapted for ganged operation when assembled in a line with identical switches, e.g. stacked switches
Abstract
The invention discloses a single breakpoint quick-action assistant switch, and the single breakpoint quick-action assistant switch comprises a square shaft, a pull rod, a contact box, a cam, a movable contact spring, a static contact spring, a wiring device, a moving contact seat and a reset spring, the movable contact spring is the elastic metal sheet, one end of the movable contact spring is compressed in the wiring device, a moving contact is formed at the other end of the movable contact spring, a static contact matching with the moving contact is formed at one end of the static contact spring, one pair of moving contact and static contact is formed in the electric loop, the pressing force between the moving contact and the static contact can be kept through the reset spring pressure of the moving contact and the contact pressure of the reset spring in the moving contact seat, so that the contact resistance is low; for breaking, the lifting force to the middle of the moving contact from the moving contact seat can have lever effect for the moving contact, the moving contact can lift upwards fast for separating from the static contact, the separating speed is fast, the breaking capability is strong, the contact pull arc and burning phenomenon will not generated easily, the stability of the assistant switch is raised and the service life is prolonged.
Description
Technical field
The present invention relates to a kind of device for switching device for electric control loop, especially a kind of for the auxiliary switch (having another name called change over switch) in high-voltage switch gear secondary control loop, belong to device for switching technical field.
Background technology
Auxiliary switch is as a kind of conventional device for switching be applied in high-voltage switch gear secondary control loop, the break-make of primary circuit, high-pressure side is controlled by the circuit opening and closing of manipulation low-pressure side secondary circuit, because it not only can safety, reliably high-voltage switch gear is electrically accurately controlled, precisely many control signals can also be manipulated in switching electrical interlocking and relay protecting system, therefore auxiliary switch has now become vitals indispensable in high and low voltage electrical equipment control system, continuous to primary side electric equipment, safety, reliability service plays vital effect.Existing auxiliary switch adopts cam-type structure mostly, and comprise square shaft, front and rear cover plate, pull bar and contact box assembly etc., its contact box assembly comprises again contact box, cam, moving contact, movable contact spring, fixed contact, back-moving spring and movable contact block etc.This kind of rotary cam type auxiliary switch carrys out the opening and closing of deciliter dynamic and static contact by the profile height of cam, realizes the switching of electric break-make in loop, in an electric loop, usually adopt double breaking points bridge contact structure; A kind of auxiliary switch disclosed in China patent of invention CN200710049339.0, its contact contact is double breaking points bridge architecture, as shown in Figure 1, the rotation with moving cam 4 ＇ by the rotation of square shaft 3 ＇, utilizes the radius drop of cam 4 ＇ profile to carry out deciliter two couples of dynamic/static contact 2 ＇ in the rotary course of cam 4 ＇; Overall size and the contact box size opened apart from being limited to cam 4 ＇ of its switch disjunction, the ultimate range that dynamic/static contact 2 ＇ is separated equals the difference of cam 4 ＇ profile radius; In addition, the arcing time of switch is directly related with the separating rate of dynamic/static contact 4 ＇, as separating rate is slow, then the degree of contact galvano-cautery is just serious, but the breaking speed of auxiliary switch of the prior art is determined by the gradient emergency degree of the rotary speed of square shaft 3 ＇ and two sections of camber lines of cam 4 ＇; The rotary speed of square shaft 3 ＇ is determined by the transmission speed of high-voltage switch gear mechanism case, if will improve the breaking speed of auxiliary switch, then can only optimize the profile gradient of cam 4 ＇; The gradient is delayed, and the precision of switch disjunction is low, and breaking speed is slow; The gradient is anxious, and the rotating torque of switch is large, and the tangential forces acted on cam 4 ＇ is large, and the degree of wear of contact and cam increases, and the mechanical endurance of auxiliary switch is reduced.Double breaking points bridge-type auxiliary switch of the prior art, when disjunction, cam 4 ＇ arcwall face jacking movable contact block 1 ＇, movable contact block 1 ＇ is subject to the effect of side force F1, always a pair contact in two couples of dynamic/static contact 2 ＇ is separated to contact prior to another, a pair dynamic/static contact 2 ＇ side release that most electromagnetic energy in loop will formerly be separated, therefore the galvano-cautery of two of auxiliary switch couples of dynamic/static contact 2 ＇ is just presented as that side arcing scaling loss is serious, and side scaling loss is slight in addition, especially, in the DC loop of larger perception, this defect is more obvious.Equally, in making process, under the effect of the side force F1 that movable contact block 1 ＇ gives in cam 4 ＇ gradient face, also there is certain time difference in the synchronism that two couples of dynamic/static contact 2 ＇ connect, always there will be a pair contact prior to another to contact, this can cause the galvanic corrosion degree of dynamic/static contact 2 ＇ different equally, after using a period of time, namely auxiliary switch can cause contact virtual connection because of the difference of both sides dynamic/static contact 2 ＇ galvanic corrosion degree, thus reduces its reliability, reduction of service life.
Summary of the invention
For prior art above shortcomings, the present invention proposes a kind of single-break quick action type auxiliary switch, it comprises square shaft, pull bar, contact box, cam, movable contact spring, static contact, termination, movable contact block and back-moving spring, its movable contact spring is elastic sheet metal, one end of movable contact spring is pressed in termination, at the other end of movable contact spring, moving contact is set, the fixed contact matched with moving contact is provided with in one end of static contact, the present invention is only provided with a pair dynamic/static contact in an electric loop, utilize back-moving spring in the reset resilient pressure of movable contact spring and movable contact block to the contact of movable contact spring, keep the thrust after dynamic/static contact contact, make its contact resistance low, when requiring to disconnect, movable contact block can allow movable contact spring form leverage to the top lift in the middle part of movable contact spring, its moving contact can be rapidly to lift and instantaneously be separated with fixed contact, its separating rate is fast, breaking capacity is strong, not easily produce contact arcing and burning phenomenon, improve the stability of auxiliary switch, extend useful life.
the present invention solves its technical problem, and the technical scheme adopted is:a kind of single-break quick action type auxiliary switch, comprise square shaft, pull bar and contact box assembly, its contact box assembly comprises contact box and is arranged on the cam in contact box, movable contact spring, static contact, termination, movable contact block and back-moving spring, movable contact block offers groove, back-moving spring is arranged in the groove of movable contact block, its design feature is: movable contact spring has flexible sheet metal, one end of movable contact spring is provided with moving contact, the other end of movable contact spring is passed termination and is pressed in termination, the fixed contact matched with moving contact is provided with in one end of static contact, boss is provided with in the groove of movable contact block, movable contact spring is passed the groove of movable contact block and is pressed on the boss of movable contact block, when movable contact block moves to the direction near square shaft with the rotation of cam, movable contact spring, under the double action of reset itself elastic force and return spring pressure, just drives the moving contact of movable contact spring one end move to fixed contact direction and be finally pressed on the fixed contact of static contact, when movable contact block moves to the direction away from square shaft with the rotation of cam, movable contact spring is under the lift-up pressure of movable contact block inner convex platform, just with the deformable supports of its termination end point for fulcrum, stick up the moving contact rising the movable contact spring other end, and drive moving contact to stick up completely from fixed contact.
Above-mentioned single-break quick action type auxiliary switch, lift limiting block is provided with in described contact box, lift limiting block is arranged in the contact box cavity between movable contact block and termination, when movable contact spring is under the lift-up pressure of movable contact block inner convex platform, with the deformable supports of termination end point for fulcrum, when sticking up the moving contact rising the movable contact spring other end, lift limiting block can moving contact stick up rise to certain distance after compress the movable contact spring stuck up in the process of liter.
Above-mentioned single-break quick action type auxiliary switch, described lift limiting block be arranged on the left of movable contact block or right side contact box cavity in, lift limiting block adopts insulating material to make, one is formed with injection moulding or the mode clamped and contact box, the position that its lift limiting block contacts with movable contact spring is ramped shaped, and matches with the inclined-plane that movable contact spring is formed after sticking up liter.
Above-mentioned single-break quick action type auxiliary switch, the boss arranged in described movable contact block groove, its end is arcuate structure.
Above-mentioned single-break quick action type auxiliary switch, the lower end of described movable contact block is inverted trapezoidal or back taper, and the end of lower end becomes arc surfaced, and the curved end of its small end is pressed in the cambered surface of cam; In contact box, be provided with chute, movable contact block can move up and down in the chute of contact box.
Above-mentioned single-break quick action type auxiliary switch, with the boss contact point in movable contact block on movable contact spring, with deformable supports point for starting point, its contact point is positioned at 0.4 to 0.8 times of its moving contact distance deformable supports point length.
Above-mentioned single-break quick action type auxiliary switch, with the boss contact point in movable contact block on movable contact spring, is arranged on the point midway between moving contact and deformable supports point.
Above-mentioned single-break quick action type auxiliary switch, after moving contact contacts with fixed contact, its contact is 1 to 2N.
Above-mentioned single-break quick action type auxiliary switch, the radial difference of cam outline is 1.2 to 3 millimeters.
Above-mentioned single-break quick action type auxiliary switch, described movable contact spring is made by having flexible beryllium-bronze, phosphor bronze or stainless steel material, and zinc-plated or silver-plated in its surface of stainless steel.
Above-mentioned single-break quick action type auxiliary switch, near the position of fixed contact in contact box, be provided with magnet steel, the magnetic fields direction of its magnet steel is that the direction that electric arc is moved towards moving contact is moved.
Above-mentioned single-break quick action type auxiliary switch, described magnet steel is cylindrical, square column type or tile shape, and the position near fixed contact in contact box is provided with corresponding magnet steel putting hole, is assembled in magnet steel putting hole by magnet steel in friction tight mode.
Above-mentioned single-break quick action type auxiliary switch, in described contact box, be provided with heavy stand, heavy stand is arranged on the afterbody that movable contact spring is connected with termination, and the cavity inner wall of heavy stand and contact box forms a skewed slot, its afterbody bending distortion, through after termination, is clamped in this skewed slot by one end of movable contact spring.
Above-mentioned single-break quick action type auxiliary switch, described heavy stand and contact box form one, and heavy stand is flat column or wedge shape.
Above-mentioned single-break quick action type auxiliary switch, cavity contact box being placed termination is teapot shape, offers the skewed slot of arc in its kettle mouth position, and the cavity of described teapot shape can hold instrument and the afterbody of movable contact spring is carried out bending deformation operation.
Above-mentioned single-break quick action type auxiliary switch, at the contact box back side, is provided with protruding sealing strip; At the corresponding site in contact box front, be provided with the seal groove matched with it, when multilayer contact box assembled is integral, the sealing strip of upper layer of contact box back side projection can stick in the seal groove in lower layer of contact box front.
Above-mentioned single-break quick action type auxiliary switch, between movable contact block and back-moving spring, be also provided with return spring holder, described back-moving spring is pressed on movable contact spring by return spring holder.
Above-mentioned single-break quick action type auxiliary switch, contact box assembly is provided with multilayer altogether, the front of every one deck contact box is provided with protruding reference column, the back side is provided with the location hole matched with it, when multilayer contact box assembled is integral, the reference column of lower layer of contact box projection can fasten in the corresponding location hole of upper layer of contact box.
Above-mentioned single-break quick action type auxiliary switch, described reference column is cylindrical, elliptical cylinder-shape, water chestnut cylindricality or back taper.
Above-mentioned single-break quick action type auxiliary switch, described moving contact and fixed contact all adopt silver-nickel slider material, and contact surface is done gold-plated process, are fixed on movable contact spring or static contact contact in the mode of riveting or welding.
compared with prior art, the invention has the beneficial effects as follows:the single-break quick action type auxiliary switch that the present invention proposes, because movable contact spring adopts elastic sheet metal to make, and in an electric loop, be only provided with a pair sound contact, its with have technology to adopt non-resilient sheet metal to make movable contact spring mutually and be provided with compared with two pairs of sound contacts in an electric loop, performance of the present invention is more excellent, work more reliable, be embodied in: when movable contact block moves to the direction near square shaft with the rotation of cam, the movable contact spring made of shell fragment material is under the double action of reset itself elastic force and return spring pressure, just the moving contact of movable contact spring one end is driven to move to fixed contact direction and be finally pressed on the fixed contact of static contact, original shape due to movable contact spring is flat, its position contacted with termination and with the position keeping parallelism that moving contact is set, after there is elastic deformation in it, the movable contact spring self that its shell fragment material makes will produce an automatically reset elastic force, to make every effort to recover its straightened condition, its elastic force that automatically resets adds the pressure of back-moving spring in movable contact block, the close contact of dynamic/static contact can be ensured, its contact put on dynamic/static contact is better than prior art and only relies on back-moving spring to apply contact to dynamic/static contact, therefore the contact of its dynamic/static contact is tightr, contact resistance is less, reliability is higher.When movable contact block moves to the direction away from square shaft with the rotation of cam, movable contact spring is under the lift-up pressure of movable contact block inner convex platform, just with the deformable supports of its termination end point for fulcrum, stick up the moving contact rising the movable contact spring other end, final drive moving contact sticks up completely from fixed contact, movable contact spring of the present invention can form lever construction with the boss contact point in movable contact block, improves separating rate and the separating distance of sound contact, therefore the breaking capacity of switch strengthens.In addition, the break-make of switch is only completed by pair of contact, also the phenomenon of virtual connection is there will not be in Long-Time Service, avoid prior art adopt two pairs of contacts easily because the contact of two pairs of contacts asynchronous, be separated asynchronous and cause the problem of arcing, scaling loss contact and virtual connection, improve the reliability of switch disjunction; Simultaneously because the present invention is only provided with a pair sound contact in an electric loop, compared with prior art, decrease amount of parts, reduce small product size, saved the installing space of auxiliary switch.
The present invention is provided with lift limiting block in contact box, when movable contact spring is under the lift-up pressure of movable contact block inner convex platform, with the deformable supports of termination end point for fulcrum, when sticking up the moving contact rising the movable contact spring other end, lift limiting block can moving contact stick up rise to certain distance after compress the movable contact spring stuck up in the process of liter, its beneficial effect is prevent from the moving contact of movable contact spring end from sticking up rising too high and touches the chamber wall of contact box, and prevents from movable contact spring from sticking up rising excessively and reduce its elastic reset performance.
The present invention is provided with heavy stand in described contact box, heavy stand is arranged on the afterbody that movable contact spring is connected with termination, and form one with contact box, the cavity inner wall of heavy stand and contact box forms a skewed slot, be beneficial to one end of movable contact spring through after termination, the afterbody of movable contact spring is carried out bending and is deformed into ramped shaped and is clamped in the skewed slot of heavy stand and contact box chamber wall formation, its beneficial effect to prevent movable contact spring from moving left and right and positioning in the course of the work, avoids movable contact spring left and right play and allow the joint of dynamic/static contact occur error.Heavy stand is arranged to flat column or wedge shape, its beneficial effect is fixing more firm of the afterbody after movable contact spring one end can be allowed to bend, more accurate positioning.As the intermediate location of heavy stand or skewed slot is made arc-shaped, then the afterbody of movable contact spring is easily allowed to produce slippage and cause positioning.
The present invention is provided with boss in the groove of described movable contact block, and the end of its boss is arcuate structure, its beneficial effect is: auxiliary switch is in deciliter course of action, movable contact spring can carry out contacting with the boss in movable contact block and bear it and compresses, the boss of arcuate structure can allow movable contact spring stick up in liter and reseting procedure, boss contact point in itself and movable contact block constantly changes, thus improve the wear resistance of movable contact block, avoid movable contact spring and allow the boss unstable wear of movable contact block and shorten its life-span as the fixing point compressed for a long time on boss, simultaneously, the boss of arcuate structure, the arm of force of movable contact spring can also be allowed constantly to change, effectively improve the stress of movable contact spring, slow down its fatigue state, extend useful life.
Inverted trapezoidal or back taper are arranged in the lower end of movable contact block by the present invention, arc surfaced is arranged in the end of lower end, the curved end of its small end is pressed in the cambered surface of cam, its beneficial effect is beneficial to contact with cam face, arc transition can reduce frictional resistance and the contact of movable contact block and cam contact, thus reduce the rotational resistance of cam and reduce the wearing and tearing of cam, be also beneficial to movable contact block simultaneously and move up and down in the chute of contact box more flexibly with the rotation of cam.In contact box, chute is set, be in order to movable contact block move up and down lead and left and right spacing, prevent movable contact block from deflecting in moving process or interfering.
Movable contact spring employing of the present invention has flexible beryllium-bronze, phosphor bronze or stainless steel material and makes, and it is zinc-plated or silver-plated in its surface of stainless steel, as everyone knows, copper has remarkable electric conductivity, and beryllium-bronze or phosphor bronze are except the excellent electric conductivity having copper product and possess, also there is remarkable strain and the performance that automatically resets; Stainless steel has good elastic deformation and recovery capability, but its conductivity is more inferior than copper, carry out zinc-plated or silver-plated on stainless steel substrates surface, significantly its electric conductivity can be promoted on the basis keeping himself favorable elasticity, namely the beneficial effect of the technical program to ensure that movable contact spring has excellent electric conductivity, can ensure that again it has excellent strain and the performance that automatically resets.
With the boss contact point in movable contact block on movable contact spring of the present invention, with deformable supports point for starting point, its contact point is positioned at 0.4 to 0.8 times of its moving contact distance deformable supports point length, boss contact point in its movable contact spring and movable contact block forms lever construction, this lever with deformable supports point for distortion starting point, when under the promotion of movable contact block at cam up or down tilting movable contact spring time, due to the middle part of contact point between deformable supports point and moving contact of itself and boss, then the movable contact spring other end moving contact rise or dropping distance be exactly 1.25 to 2.5 times that movable contact block moves up or down distance, namely the speed that dynamic/static contact combines and is separated is 1.25 to 2.5 times of cam contour pace of change, certainly, preferred value be by movable contact spring with the boss contact point in movable contact block, be arranged on the point midway between moving contact and deformable supports point, now, the speed that dynamic/static contact combines and is separated is 2 times of cam contour pace of change, namely more fast again than the separating rate of prior art, as everyone knows, the arcing time of switch is directly related with the separating rate of sound contact, speed is faster, arcing time is shorter, not even arcing, namely the beneficial effect of the technical program substantially reduces the arcing time between sound contact, drastically reduce the area the galvano-cautery degree of contact, extend the useful life of contact, improve the response speed of switch.
Contact after moving contact contacts with fixed contact by the present invention arranges and is adjusted to 1 to 2N, and be through many experiments checking, this contact value is the optimum pressure value that dynamic/static contact combines, as contact is excessive, and the easily wearing and tearing of aggravation contact; As contact is too small, then contact resistance increases, and can cause heating, the problem of even virtual connection.
The radial difference of cam outline is set as 1.2 to 3 millimeters by the present invention, has also been through many experiments checking, and this radial difference coordinates the movable contact spring structure of lever principle, auxiliary switch can be allowed to respond fast, realize instantaneous cut-offfing; Can realize again the abundant separation of sound contact and effectively combine, this radial difference is better than the radial difference of prior art cam outline simultaneously, and the radius drop of its cam outline is less, and rotary resistance is less, wear and tear also less, and response speed is faster.
The position of the present invention's close fixed contact in contact box, be provided with magnet steel, the magnetic fields direction of its magnet steel is that the direction that electric arc is moved towards moving contact is moved, its beneficial effect is: by between sound contact, because of larger current disjunction, issuable electric arc elongates the magnetic field energy that magnet steel produces, accelerate arc extinction, improve connecting-disconnecting function and the reliability of auxiliary switch.Being assembled in friction tight mode in the putting hole arranged near the position of fixed contact in contact box by magnet steel, be for the ease of producing and assembling, and friction tight mounting means also can ensure that magnet steel is in use not easily deviate from.
The present invention is at the contact box back side, be provided with protruding sealing strip, at the corresponding site in contact box front, be provided with the seal groove matched with it, the raised seals bar at the upper layer of contact box back side can stick in lower layer of contact box seal groove, to ensure that adjacent contact case assembly can realize sealing after assembly, causing the electric fault of auxiliary switch in the cavity being immersed in contact box to prevent dust and water droplet.
The present invention lift limiting block is arranged on the left of movable contact block or right side contact box cavity in, its effect is all similar, lift limiting block is arranged in the contact box cavity between movable contact block and moving contact, its spacing contact site is located on the movable contact spring of moving contact one end, when lift limiting block is arranged on opposite side, its spacing contact site is located on the other end movable contact spring away from moving contact, but its effect and effect be all restriction movable contact spring excessive stick up liter, in case the moving contact of stop contact end sticks up the too high of liter and touches the chamber wall of contact box, and prevent from movable contact spring from sticking up rising excessively and reduce its elastic reset performance.It is unaffected in order to ensure the electric property of auxiliary switch that lift limiting block adopts insulating material to make, with injection moulding or the mode that clamps, lift limiting block and contact box are formed one, for the ease of producing and processing, ramped shaped is arranged at the position that lift limiting block contacts with movable contact spring, be in order to movable contact spring stick up rise after the inclined-plane that formed match.
Cavity contact box being placed termination is arranged to teapot shape by the present invention, the skewed slot of arc is offered in its kettle mouth position, its beneficial effect is, in order to hold instrument, the afterbody of movable contact spring is carried out bending deformation operation, and namely the technical program is the needs in order to be conducive to technological operation.
The present invention is also provided with return spring holder between movable contact block and back-moving spring, described back-moving spring is pressed on the middle part of movable contact spring by return spring holder, it is the reliability contacted with movable contact spring to increase back-moving spring, obviously, the face contact realized by return spring holder is better than the linear contact lay that back-moving spring directly compresses formation.
Auxiliary switch of the present invention, its contact box assembly is provided with multilayer altogether, and be to realize various control function by a switch, every one deck contact box assembly all can form two independently electric loops.Protruding reference column is set in the front of every one deck contact box assembly, the back side arranges the location hole matched with it, to allow the reference column of lower layer of contact box projection can fasten in the corresponding location hole of upper layer of contact box, with the precise positioning realizing multilayer contact box assembled be firmly connected, certainly, described reference column adopts cylindrical, elliptical cylinder-shape, water chestnut cylindricality or back taper all can realize this function.
Moving contact of the present invention and fixed contact all adopt silver-nickel slider material, and contact surface is done gold-plated process, it is the electric conductivity in order to strengthen between contact, reduce its contact resistance, in the mode of riveted joint or welding, contact is fixed on movable contact spring or static contact, to make contact and movable contact spring and static contact firmly form one, coming off in the course of the work to prevent it.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the structural representation of double breaking points bridge-type auxiliary switch of the prior art.
Fig. 2 is the structure chart of the contact box assembly in single-break quick action type auxiliary switch of the present invention.
Fig. 3 is the location diagram of movable contact spring in the present invention and movable contact block and return spring holder.
Fig. 4 is the structure chart at the contact box back side in the present invention.
Fig. 5 is overall structure figure of the present invention.
In figure: the movable contact block of 1 ＇-prior art; The dynamic/static contact of 2 ＇-prior art; The square shaft of 3 ＇-prior art; The cam of 4 ＇-prior art; F1-prior art cam is applied to the side force of movable contact block;
1-square shaft; 2-pull bar; 3-front shroud; 4-baffle plate; 5-contact box assembly; 6-contact box; 7-back shroud; 8-movable contact spring; 8a-moving contact; 9-screw; 10-static contact; 10a-fixed contact; 11-termination; 12-cam; R1-cam path; The large footpath of R2-cam; 13-movable contact block; 13a-boss; 14-back-moving spring; 15-return spring holder; 20-magnet steel; 601-lift limiting block (601); 602-heavy stand; 603-reference column; 604-magnet steel putting hole; 605-boss sealing strip; 607-location hole; 610-seal groove; X-deformable supports point; B-skewed slot; C-chute.
Specific embodiments
As shown in Figures 2 to 5, the first embodiment of the present invention is, a kind of single-break quick action type auxiliary switch, it comprises square shaft 1, pull bar 2, front shroud 3, back shroud 7 and multilayer contact box assembly 5, a baffle plate 4 is respectively provided with respectively at the head and the tail two ends of multilayer contact box assembly 5, square shaft 1 runs through each layer contact box assembly 5, by two pull bars 2, each layer contact box assembly 5 is strained to one, composition auxiliary switch.
Cam 12, movable contact spring 8, static contact 10, termination 11, movable contact block 13, back-moving spring 14 and return spring holder 15 that contact box assembly 5 comprises contact box 6 and is arranged in contact box 6 cavity, square shaft 1 pierces in the square hole in the middle part of cam 12, its cam 12 adopts the disc cam with semidiameter, the radial difference of its cam large footpath R2 and cam path R1 controls between 1.2 to 3 millimeters better, and present embodiment adopts the radial difference of 2 millimeters.Inverted trapezoidal is arranged in the lower end of movable contact block 13, also can be arranged to back taper, and the end of lower end becomes arc surfaced, and the curved end of its small end is pressed in the cambered surface of cam 12; In contact box 6, be provided with chute C, movable contact block 13 can move up and down in the chute C of contact box 6.
Movable contact block 13 offers the groove installing movable contact spring 8, back-moving spring 14 is arranged in the groove of movable contact block 13 by return spring holder 15, movable contact spring 8 employing has flexible beryllium-bronze material and makes, certainly, movable contact spring 8 can also adopt has flexible phosphor bronze or stainless steel material making, or other have the metal material of favorable elasticity and electric conductivity, when adopting stainless steel material to make movable contact spring 8, for improving the electric conductivity of movable contact spring 8, should at stainless plating zinc on surface or silver-plated.The original shape of movable contact spring 8 is flat, its position contacted with termination 11 and with the position keeping parallelism that moving contact 10a is set, after there is elastic deformation in it, the movable contact spring 8 self that its shell fragment material makes will produce an automatically reset elastic force, to make every effort to recover its straightened condition, moving contact 8a is fixed with in the mode of riveted joint or welding in one end of movable contact spring 8, the other end of movable contact spring 8 is passed termination 11 and is pressed in termination 11 by screw 9, static contact 10 is compressed in other end termination 11, be fixed with in the mode of riveted joint or welding the fixed contact 10a matched with moving contact 8a in one end of static contact 10, moving contact 8a and fixed contact 10a all adopts silver-nickel slider material to make, and contact surface is done gold-plated process, to improve its electric conductivity, reduce its contact resistance.
The present embodiment is provided with boss 13a in the groove of movable contact block 13, the end of its boss 13a is the spherical arcuate structure of semicircle, by movable contact spring 8 through the groove of movable contact block 13 and the boss 13a being stuck in return spring holder 15 and movable contact block, the arcuate structure that the end of its boss 13a adopts semicircle spherical, movable contact spring 8 can be allowed to stick up in liter and reseting procedure, the contact point of the boss 13a in itself and movable contact block constantly changes, to improve the wear resistance of movable contact block 13, avoid movable contact spring 8 compress a fixing point on boss 13a for a long time and allow the boss 13a unstable wear of movable contact block and shorten its life-span, simultaneously, the boss 13a of the spherical arcuate structure of semicircle, the arm of force of movable contact spring 8 can also be allowed constantly to change, effectively improve the stress of movable contact spring 8, alleviate its fatigue state, extend its useful life.With the contact point of the boss 13a in movable contact block on movable contact spring 8, with deformable supports point X for starting point, its contact point is positioned at 0.4 to 0.8 times of its moving contact 8a distance deformable supports point X length for good, its contact point is arranged on the point midway between moving contact 8a and deformable supports point X by present embodiment, in present embodiment, movable contact spring 8 can form lever construction with the contact point of movable contact block inner convex platform 13a, this lever with deformable supports point X for sticking up rise point, when movable contact block 13 under the promotion of cam 12 up or down tilting movable contact spring 8 time, due to the middle part of contact point between its deformable supports point X and moving contact 8a of itself and boss 13a, then movable contact spring 8 other end moving contact 8a rise or dropping distance be exactly 1.25 to 2.5 times that movable contact block 13 moves up or down distance, namely the speed that dynamic/static contact combines and is separated is 1.25 to 2.5 times of cam contour pace of change, present embodiment by movable contact spring and the contact point of movable contact block inner convex platform 13a be arranged on point midway between moving contact 8a and deformable supports point X, now, the speed that dynamic/static contact combines and is separated is 2 times of cam contour pace of change, namely more fast again than the separating rate of prior art.
When movable contact block 13 moves to the direction near square shaft 1 with the rotation of cam 12, movable contact spring 8, under the double action of reset itself elastic force and return spring pressure, just drives the moving contact 8a of movable contact spring 8 one end move to fixed contact 10a direction and be finally pressed on the fixed contact 10a of static contact 10; In present embodiment, after moving contact 8a contacts with fixed contact 10a, its contact is set as 1 to 2N.
When movable contact block 13 moves to the direction away from square shaft 1 with the rotation of cam 12, under the lift-up pressure of the arc boss 13a of movable contact spring 8 in movable contact block 13, just with the deformable supports point X of its termination 11 end for fulcrum, tilt the moving contact 8a of movable contact spring 8 other end, drive rapidly moving contact 8a to stick up completely from fixed contact 10a.
Present embodiment is provided with lift limiting block 601 in contact box 6, lift limiting block 601 is arranged in the contact box cavity between movable contact block 13 and termination 11, and adopt the mode of injection moulding and contact box 6 to form one, its lift limiting block 601 is made by fire retardant insulating plastic material nylon PA66 or polycarbonate material with contact box 6, lift limiting block 601 can be arranged on the left of movable contact block 13 or right side contact box cavity in, lift limiting block 601 is arranged in the contact box cavity on the right side of movable contact block 13 by present embodiment, namely be arranged in the contact box cavity between movable contact block 13 and deformable supports point X, when movable contact spring 8 is under the lift-up pressure of movable contact block inner convex platform 13a, with the deformable supports point X of termination 11 end for fulcrum, when sticking up the moving contact 8a rising movable contact spring 8 other end, lift limiting block 601 can moving contact 8a stick up rise to certain distance after compress the movable contact spring 8 stuck up in the process of liter, in case the moving contact 8a of stop contact end sticks up the too high of liter and touches the chamber wall of contact box 6, and prevent from movable contact spring 8 from sticking up rising excessively and reduce its elastic reset performance, the position that lift limiting block 601 contacts with movable contact spring 8 is ramped shaped, and match with the inclined-plane that movable contact spring 8 is formed after sticking up liter.
Present embodiment is also provided with heavy stand 602 in contact box 6, the shape of its heavy stand 602 adopts square column type or wedge shape to be advisable, what present embodiment adopted is wedge shape heavy stand, heavy stand 602 is arranged on the afterbody that movable contact spring 8 is connected with termination 11, and form one with contact box 6, heavy stand 602 forms a skewed slot B with the cavity inner wall of contact box 6, one end of movable contact spring 8 is through after termination 11, the afterbody of movable contact spring 8 is carried out bending and is deformed into ramped shaped and is clamped in the skewed slot B of heavy stand 602 and contact box chamber wall formation, can prevent movable contact spring 8 from moving left and right and positioning in the course of the work, thus avoid allowing the joint of dynamic/static contact occur error because of movable contact spring about 8 play.In order to bending operation tool (usually adopt and change cutter bottle opener as bending tool) can be held, the afterbody of movable contact spring 8 is carried out bending deformation operation, cavity contact box 6 being placed termination 11 has also been arranged to teapot shape by present embodiment, offers the skewed slot B of arc in its kettle mouth position.
Present embodiment also in contact box 6 near the position of fixed contact 10a, be provided with magnet steel putting hole 604, in this magnet steel putting hole 604, in friction tight mode, magnet steel 20 is installed, the shape of its magnet steel 20 can be cylindrical, square column type or tile shape, present embodiment adopts square column type magnet steel, the magnetic fields direction of its magnet steel 20 is that the direction that electric arc is moved towards moving contact 8a is moved, by between sound contact, because of larger current disjunction, issuable electric arc elongates the magnetic field energy that its magnet steel 20 produces, accelerate arc extinction, improve breaking capacity and the reliability of auxiliary switch.
Present embodiment is at contact box 6 back side, be provided with protruding sealing strip 605, at the corresponding site in contact box 6 front, be provided with the seal groove 610 matched with it, after multilayer contact box assembly 5 is assembled together, the sealing strip 605 of its upper layer of contact box 6 projection can stick in the seal groove 610 of lower layer of contact box 6, invades in the cavity in contact box 6 front to prevent dust and water droplet.Present embodiment is also provided with protruding reference column 603 in the front of every one deck contact box 6 simultaneously, its reference column 603 can adopt cylindrical, elliptical cylinder-shape, water chestnut cylindricality or back taper, present embodiment adopts cylindrical, the back side is provided with the location hole 607 matched with it, after forming auxiliary switch when being assembled together by multilayer contact box assembly 5, the reference column 603 of lower layer of contact box 6 projection can fasten in the corresponding location hole 607 of upper layer of contact box 6, with the precise positioning realizing the assembling of multilayer contact box assembly 5 be firmly connected.
Auxiliary switch of the present invention, its contact box assembly 5 is provided with multilayer altogether, and be to realize various control function by a switch, every one deck contact box assembly 5 all can form two independently electric loops.A moving contacting plate be made up of elastic metallic material 8 is provided with in an electric loop, its movable contact spring 8 forms lever construction with the contact point of the boss 13a in movable contact block, improve separating rate and the separating distance of sound contact, therefore the breaking capacity of switch strengthens.And the present invention is only provided with a moving contact 8a on moving contacting plate 8, namely the present invention is only provided with a pair sound contact in an electric loop, the break-make of switch is only completed by pair of contact, Long-Time Service also there will not be the phenomenon of virtual connection, compared with prior art, avoid prior art adopt two pairs of contacts easily because the contact of two pairs of contacts asynchronous, be separated asynchronous and cause the problem of arcing, scaling loss contact and virtual connection, improve the electric property of auxiliary switch and the reliability of disjunction; And decrease amount of parts, reduce small product size, save the installing space of auxiliary switch.
Above-describedly be only preferred embodiment of the present invention, be not limited to content of the present invention, every any amendment done within the spirit and principles in the present invention, equivalently to replace and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a single-break quick action type auxiliary switch, comprise square shaft (1), pull bar (2) and contact box assembly (5), its contact box assembly (5) comprises contact box (6) and is arranged on the cam (12) in contact box (6), movable contact spring (8), static contact (10), termination (11), movable contact block (13) and back-moving spring (14), movable contact block (13) offers groove, back-moving spring (14) is arranged in the groove of movable contact block (13), it is characterized in that: movable contact spring (8) has flexible sheet metal, one end of movable contact spring (8) is provided with moving contact (8a), the other end of movable contact spring (8) is passed termination (11) and is pressed in termination (11), the fixed contact (10a) matched with moving contact (8a) is provided with in one end of static contact (10), boss (13a) is provided with in the groove of movable contact block (13), movable contact spring (8) is pressed on the boss (13a) of movable contact block (13) through the groove of movable contact block (13), when movable contact block (13) moves to the direction near square shaft (1) with the rotation of cam (12), movable contact spring (8), under the double action of reset itself elastic force and back-moving spring (14) pressure, just drives the moving contact (8a) of movable contact spring (8) one end move to fixed contact (10a) direction and be finally pressed on the fixed contact (10a) of static contact (10), when movable contact block (13) moves to the direction away from square shaft (1) with the rotation of cam (12), movable contact spring (8) is under the lift-up pressure of movable contact block (13) inner convex platform (13a), just with the deformable supports of its termination end point (X) for fulcrum, stick up the moving contact (8a) rising movable contact spring (8) other end, and drive moving contact (8a) to stick up completely from fixed contact (10a).
2. a kind of single-break quick action type auxiliary switch according to claim 1, it is characterized in that: in described contact box (6), be provided with lift limiting block (601), lift limiting block (601) is arranged in the contact box cavity between movable contact block (13) and termination (11), when movable contact spring (8) is under the lift-up pressure of movable contact block (13) inner convex platform (13a), with the deformable supports of termination end point (X) for fulcrum, when sticking up moving contact (8a) rising movable contact spring (8) other end, lift limiting block (601) can moving contact (8a) stick up rise to certain distance after compress the movable contact spring (8) stuck up in the process of liter.
3. a kind of single-break quick action type auxiliary switch according to claim 2, it is characterized in that: described lift limiting block (601) is arranged in contact box (6) cavity on movable contact block (13) left side or right side, lift limiting block (601) adopts insulating material to make, one is formed with injection moulding or the mode clamped and contact box (6), the position that its lift limiting block (601) contacts with movable contact spring (8) is ramped shaped, and matches with the inclined-plane that movable contact spring (8) is formed after sticking up liter.
4. a kind of single-break quick action type auxiliary switch according to claim 1, is characterized in that: the boss (13a) arranged in described movable contact block (13) groove, its end is arcuate structure.
5. a kind of single-break quick action type auxiliary switch according to claim 1 or 4, it is characterized in that: the lower end of described movable contact block (13) is inverted trapezoidal or back taper, the end of lower end becomes arc surfaced, and the curved end of its small end is pressed in the cambered surface of cam (12); In contact box (6), be provided with chute (C), movable contact block (13) can move up and down in the chute of contact box (6) (C).
6. a kind of single-break quick action type auxiliary switch according to any one of claim 1 to 4, it is characterized in that: the contact point of the upper and movable contact block inner convex platform (13a) of movable contact spring (8), with deformable supports point (X) for starting point, its contact point is positioned at 0.4 to 0.8 times of its moving contact (8a) distance deformable supports point (X) length.
7. a kind of single-break quick action type auxiliary switch according to claim 6, is characterized in that: the contact point of the upper and movable contact block inner convex platform (13a) of movable contact spring (8), is arranged on the point midway between moving contact (8a) and deformable supports point (X).
8. a kind of single-break quick action type auxiliary switch according to any one of claim 1 to 4, is characterized in that: after moving contact (8a) contacts with fixed contact (10a), its contact is 1 to 2N.
9. a kind of single-break quick action type auxiliary switch according to any one of claim 1 to 4, is characterized in that: the radial difference of cam (12) outline is 1.2 to 3 millimeters.
10. a kind of single-break quick action type auxiliary switch according to any one of claim 1 to 4, it is characterized in that: described movable contact spring (8) is made by having flexible beryllium-bronze, phosphor bronze or stainless steel material, and zinc-plated or silver-plated in its surface of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410531238.7A CN104319146B (en) | 2014-10-11 | 2014-10-11 | Single breakpoint quick-action assistant switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410531238.7A CN104319146B (en) | 2014-10-11 | 2014-10-11 | Single breakpoint quick-action assistant switch |
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| Publication Number | Publication Date |
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| CN104319146A true CN104319146A (en) | 2015-01-28 |
| CN104319146B CN104319146B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410531238.7A Active CN104319146B (en) | 2014-10-11 | 2014-10-11 | Single breakpoint quick-action assistant switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987147A (en) * | 2018-09-17 | 2018-12-11 | 北京博瑞莱智能科技集团有限公司 | Voltage-regulating switch unit and adjustable transformer |
| CN111373500A (en) * | 2017-11-22 | 2020-07-03 | 欧梯克纽约股份有限公司 | Connection verifier |
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| BE504869A (en) * | 1955-01-11 | |||
| US3836742A (en) * | 1973-07-02 | 1974-09-17 | Lake Shore Electric Corp | Switch with peripheral cam actuator |
| CN201252032Y (en) * | 2008-09-26 | 2009-06-03 | 成都瑞联电气股份有限公司 | Split-level type auxiliary switch |
| CN201438434U (en) * | 2009-06-11 | 2010-04-14 | 台州市轩业电气设备有限公司 | Multi-contact travel switch |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE504869A (en) * | 1955-01-11 | |||
| US3836742A (en) * | 1973-07-02 | 1974-09-17 | Lake Shore Electric Corp | Switch with peripheral cam actuator |
| CN201252032Y (en) * | 2008-09-26 | 2009-06-03 | 成都瑞联电气股份有限公司 | Split-level type auxiliary switch |
| CN201438434U (en) * | 2009-06-11 | 2010-04-14 | 台州市轩业电气设备有限公司 | Multi-contact travel switch |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111373500A (en) * | 2017-11-22 | 2020-07-03 | 欧梯克纽约股份有限公司 | Connection verifier |
| CN111373500B (en) * | 2017-11-22 | 2022-08-23 | 欧梯克纽约股份有限公司 | Connection verifier |
| CN108987147A (en) * | 2018-09-17 | 2018-12-11 | 北京博瑞莱智能科技集团有限公司 | Voltage-regulating switch unit and adjustable transformer |
| CN108987147B (en) * | 2018-09-17 | 2023-12-15 | 北京博瑞莱智能科技集团有限公司 | Voltage regulating switch device and voltage regulating transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104319146B (en) | 2017-02-01 |
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