CN205959810U - Cam switch - Google Patents

Abstract

The utility model discloses a cam switch belongs to the switch field, aims at providing a cam switch, has still can restore to the throne extension cam switch life's advantage, its technical scheme main points at the long -term back slide bar that uses the switch seat is equipped with magnet at the periphery of static contact, correspond on the slide bar and be equipped with the iron plate, when the cam drive slide bar at switch seat inside slip measured time, movable contact spring and static contact separation, when the cam separates with the slide bar, the magnetic force that magnet produced adsorbs the iron plate to the direction of being close to magnet.

Description

A kind of cam switch

Technical field

This utility model is related to field of switches, particularly to a kind of cam switch.

Background technology

Cam switch refers to move to adjust and to control the electrical equipment of contact working condition by cam.It has control can Lean on, stable preferred.

The Chinese patent of Publication No. CN201594477U discloses a kind of cam switch, including switch base, cam, slide bar And electric contact point, described cam passes through camshaft on switch base, and described cam is made up of overhead cam and lower cam, convex Wheel and lower cam are Split type structures, and are connected by bindiny mechanism, and the eccentric angle difference of upper and lower cam is 15-45 degree, cam Both sides are provided with slide bar, and slide bar is slidably connected with switch base, and the slide bar of both sides staggers up and down, and by top respectively with upper and lower cam Contact, described electric contact point is divided into movable contact spring and static contact, the slide bar of both sides is provided with movable contact spring, and corresponding with movable contact spring The switch base at place is provided with static contact, is provided with response agency between slide bar and switch base.It achieves a kind of fortune of two slide bars Dynamic process flexible.But response agency is made up of a compression spring, when cam often extrudes slide bar, slide bar is by compression spring Compression, compression spring has elastic force after being compressed and slide bar resets, therefore after long-term use compression spring due to by through normal pressure Contract and produce permanent deformation not resilient, and then slide bar can not be resetted, the use of impact cam switch.

Utility model content

The purpose of this utility model is to provide a kind of cam switch, has slide bar after long-term use and still can reset, The advantage extending cam switch service life.

Above-mentioned technical purpose of the present utility model technical scheme is that：A kind of cam switch, bag Include switch base, the camshaft being fixed on switch base, the cam being fixed on camshaft, sliding are connected to the cunning in switch base Bar, the movable contact spring being fixed on slide bar and the static contact be correspondingly arranged with movable contact spring is fixed on switch base, described cam bag Include overhead cam and lower cam, described switch base is provided with Magnet in the periphery of static contact, described slide bar is correspondingly provided with iron block, when convex When wheel driving moving slide-bar slides in switch base, described movable contact spring is separated with static contact, when cam is separated with slide bar, described Magnet The magnetic force producing is by iron block near the absorption of the direction of Magnet.

By adopting technique scheme, rotation cam axle and then drive cam rotation, during cam rotation cam edge with Slide bar is conflicted, and when becoming larger with the edge diameter with cam contact, cam promotes slide bar to move to the direction away from cam, Movable contact spring is separated with static contact, being rotated further with cam, the diameter that cam is conflicted with slide bar diminishes, now Magnet Iron block on magnetic-adsorption slide bar is so that slide bar moves to Magnet direction so that movable contact spring moves to static contact, until movable contact spring Conflict with static contact and trigger static contact, now Magnet produces absorption affinity so that slide bar is fixed in switch base to iron block, until When the edge conflicted with cam is increased, cam drives slide bar to move in switch base again, because the magnetic force that Magnet produces is stable, The absorption affinity that iron block is produced is also stable, and therefore Magnet still can adsorb iron block so that being pushed away by cam after long-term use The slide bar going out resets, and extends cam switch service life, cam is set to overhead cam and lower cam realizes camshaft rotating all Slide bar can be released.

This utility model is further arranged to：Described slide bar is being provided with extension spring towards the side of Magnet, when stretching bullet Spring is in movable contact spring triggering static contact during original state.

By adopting technique scheme, when the setting of extension spring makes cam release slide bar, extension spring is drawn Stretch and there is elastic force, and then when cam is separated with slide bar, slide bar is pulled to cam direction by the elastic force of extension spring, slides in addition Iron block on bar is also subject to the absorption affinity of Magnet, therefore the setting of extension spring make together with Magnet movable contact spring on slide bar with Static contact on switch base is quickly conflicted, when extension spring is in original state movable contact spring triggering static contact it is ensured that extension spring not In movable contact spring triggering static contact, movable contact spring can be produced to the thrust away from static contact direction.

This utility model is further arranged to：Described slide bar is provided with tapered protrusion with the side of cam contact, described taper The raised position with cam contact is provided with the cambered surface with cam engagement.

By adopting technique scheme, the setting of tapered protrusion reduces slide bar with cam contact area so that cam Produce the friction between slide bar and cam when sliding to reduce and slide bar between, move beneficial to promotion slide bar during cam rotation, cambered surface Setting further reduce friction between slide bar and cam, reduce slide bar when slide bar is conflicted with cam and be applied on cam Stress, protects the quality of cam edge.

This utility model is further arranged to：Described camshaft is provided with the fixing dress being fixed on cam on camshaft Put.

By adopting technique scheme, cam is fixed on camshaft fixing device, when cam is connect for a long time with slide bar When touching and wearing and tearing, it is conveniently replaceable cam, it is to avoid change whole cam switch.

This utility model is further arranged to：Described fixing device includes the threaded rod being arranged on camshaft outer wall, institute State threaded rod one end to threaded with camshaft, the other end is threadeded with cam, when cam is fastened on threaded rod, described The plane that cam is located is vertical with the axis of camshaft.

By adopting technique scheme, on camshaft threaded threaded rod be easy to connect cam, when need more When changing cam, only cam need to be screwed off from threaded rod, new cam be screwed on threaded rod, when cam is fastened on screw thread When on bar, the plane that cam is located vertical with the axis of camshaft it is ensured that promotion slide bar movement during cam rotation.

This utility model is further arranged to：On described camshaft, the axis along camshaft is provided with some confession threaded rods connections Screwed hole.

By adopting technique scheme, the setting of some screwed holes is conveniently replaceable the link position of camshaft and cam, When single screwed hole damages it is not necessary to change the connection that camshaft also can achieve cam, extend the service life of camshaft.

This utility model is further arranged to：The confession cam that described fixing device includes being arranged on camshaft outer wall embeds Stopper slot, described camshaft is threaded with push rod along axis, and camshaft is stretched out in one end of described push rod, and the other end stretches out limit The cell wall of position groove is simultaneously conflicted with cam.

By adopting technique scheme, the placement of cam is easy in the setting of stopper slot, turn push rod make push rod along Camshaft axis moves, and then cam is fixed between the cell wall of stopper slot and cam push rod, when needing to take cam When going out, turn push rod and then push rod is separated with cam, cam is taken out.

This utility model is further arranged to：Described cam is provided with, with the position of ejector pin contact, the groove embedding for push rod.

By adopting technique scheme, the setting of groove makes push rod enter in cam, strengthens consolidating of cam further Determine so that cam is stably fixed in stopper slot.

This utility model is further arranged to：Upper snap ring that described fixing device includes being set on camshaft outer wall and under Snap ring, described overhead cam is fixed on snap ring, and described lower cam is fixed on lower snap ring, described upper snap ring and lower snap ring one end Hinged, the other end is bolted connection.

By adopting technique scheme, upper and lower cam is fixed on camshaft by upper snap ring and lower snap ring respectively, enters And upper snap ring and lower snap ring are fastened by bolts so that cam is fastened on cam.

This utility model is further arranged to：Described camshaft is provided with the annular groove embedding for upper snap ring and lower snap ring.

By adopting technique scheme, the setting of annular groove makes snap ring and lower snap ring embed on camshaft, it is to avoid on Snap ring and the impact contact with cam for the slide bar of lower snap ring, limit snap ring and lower snap ring on camshaft in the axial direction in addition Movement, secure the position of cam.

In sum, this utility model has the advantages that：Switch base is provided with Magnet, slide bar in the periphery of static contact It is provided with iron block corresponding with Magnet, when actuated by cams slide bar slides in switch base, movable contact spring is separated with static contact, when convex When wheel is separated with slide bar, iron block absorption near the absorption of the direction of Magnet, is made by the magnetic force that Magnet produces by iron block by Magnet Obtain the slide bar being promoted by cam to reset it is ensured that Magnet still by magnet adsorption, and then slide bar can be resetted after life-time service, protect The use of card cam switch.

Brief description

Fig. 1 is the structural representation of embodiment 1；

Fig. 2 is the structural representation for embodying cam and slide bar of embodiment 1；

Fig. 3 is the structural representation for embodying static contact and movable contact spring of embodiment 1；

Fig. 4 is the structural representation for embodying camshaft of embodiment 1；

Fig. 5 is the structural representation for embodying threaded rod of embodiment 1；

Fig. 6 is the structural representation of embodiment 2；

Fig. 7 is the structural representation for embodying stopper slot of embodiment 2；

Fig. 8 is the A-A sectional view in Fig. 7；

Fig. 9 is the structural representation of embodiment 3；

Figure 10 is the structural representation for embodying overhead cam and camshaft of embodiment 3；

Figure 11 is the sectional view of B-B in Figure 10.

In figure, 1, switch base；11st, camshaft；111st, cam；1111st, overhead cam；1112nd, lower cam；112nd, threaded rod； 113rd, screwed hole；114th, push rod；115th, stopper slot；116th, groove；117th, upper snap ring；118th, lower snap ring；1181st, bolt；119、 Annular groove；12nd, slide bar；121st, movable contact spring；1211st, iron block；122nd, tapered protrusion；1221st, cambered surface；13rd, static contact；131st, Magnet； 14th, extension spring.

Specific embodiment

Below in conjunction with accompanying drawing, this utility model is described in further detail.

Embodiment 1：A kind of cam switch, sees figures.1.and.2, and including switch base 1, is provided with camshaft on switch base 1 11, cam 111 is provided with camshaft 11, in the slide bar 12 being symmetrically arranged on two with cam 111 conflict of cam 111, when convex When wheel 111 rotates, cam 111 can drive slide bar 12 to move in switch base 1, the side conflicted with cam 111 in slide bar 12 It is provided with tapered protrusion 122, reduce slide bar 12 and cam 111 contact area and slide so that producing between cam 111 and slide bar 12 When friction between slide bar 12 and cam 111 reduce, promote slide bar 12 movement, tapered protrusion in addition beneficial to cam 111 when rotating 122 positions contacting with cam 111 are provided with the cambered surface 1221 with cam 111 cooperation, further reduce slide bar 12 and cam 111 Between friction, reduce the stress that when slide bar 12 is conflicted with cam 111, slide bar 12 is applied on cam 111, protect cam 111 The quality at edge；Movable contact spring 121 is fixed with slide bar 12, static contact corresponding with movable contact spring 121 is provided with switch base 1 13, when movable contact spring 121 is conflicted with static contact 13, movable contact spring 121 triggering static contact 13, by circuit communication, is realized cam 111 and is opened Close the effect adjusting contactor.

With reference to Fig. 2 and Fig. 3 so that cam 111 by slide bar 12 to after promote away from cam 111 direction, slide bar 12 according to So can reset, therefore switch base 1 is provided with Magnet 131 in the periphery of static contact 13, and slide bar 12 is correspondingly provided with iron block 1211, when When cam 111 is separated with slide bar 12, iron block 1211 is adsorbed, when convex by the magnetic force that Magnet 131 produces near the direction of Magnet 131 When wheel 111 driving slide bar 12 slides in switch base 1, the thrust that cam 111 is applied on slide bar 12 is more than what Magnet 131 produced Magnetic force, and then movable contact spring 121 is separated with static contact 13.

With reference to Fig. 2 and Fig. 3, slide bar 12 is being provided with extension spring 14 towards the side of Magnet 131 so that cam 111 in addition When slide bar 12 is released, extension spring 14 is stretched and has elastic force, and then when cam 111 is separated with slide bar 12, stretches bullet Slide bar 12 is pulled by the elastic force of spring 14 to cam 111 direction, and the iron block 1211 on slide bar 12 is also subject to adsorbing of Magnet 131 in addition Power, the therefore setting of extension spring 14 make the stationary contact on movable contact spring 121 and switch base 1 on slide bar 12 together with Magnet 131 Piece 13 is quickly conflicted, and when extension spring 14 is in original state, movable contact spring 121 triggering static contact 13 is it is ensured that extension spring 14 will not be During movable contact spring 121 triggering static contact 13, movable contact spring 121 is produced to the thrust away from static contact 13 direction.

With reference to Fig. 3, cam 111 includes overhead cam 1111 and lower cam 1112, and realizing camshaft 11 rotating can be by Slide bar 12 is released, and reduces the angle of camshaft 11 rotation, in order to be fixed on cam 111 on camshaft 11, in camshaft 11 outer walls are provided with threaded rod 112（As Fig. 5）, be used for fixing overhead cam 1111 and lower cam 1112, threaded rod 112 one end with convex Wheel shaft 11 is threaded, and the other end is threadeded with cam 111, and then cam 111 is fixed on camshaft by threaded rod 112 On 11, when cam 111 is fastened on threaded rod 112, cam 111 be located plane vertical with the axis of camshaft 11 it is ensured that Promote slide bar 12 mobile when cam 111 rotates；In addition on camshaft 11, the axis along camshaft 11 is provided with some confession threaded rods 112 The screwed hole 113 connecting（As Fig. 4）, when single screwed hole 113 damages it is not necessary to change camshaft 11 also can achieve cam 111 connection, extends the service life of camshaft 11.

Specific operation process：When need by cam switch close closed circuit work when, rotation cam axle 11 so drive convex Wheel 111 rotation, when cam 111 rotates, conflicted with slide bar 12 in cam 111 edge, the edge contacting with cam 111 with slide bar 12 Diameter becomes larger, and cam 111 promotes the power of slide bar 12 to be more than the magnetic force that Magnet 131 adsorbs iron block 1211, and then makes slide bar 12 move to the direction away from cam 111, and now extension spring 14 is stretched and has elastic force, when movable contact spring 121 and static contact 13 when separating, and circuit disconnects, when cam switch control circuit work, with being rotated further of cam 111, cam 111 and cunning The diameter that bar 12 is conflicted diminishes, until slide bar 12 is separated with cam 111, the now ferrum on the magnetic-adsorption slide bar 12 of Magnet 131 Slide bar 12 is pulled so that slide bar 12 Rapid reset by the elastic force of block 1211 and extension spring 14 to cam 111 direction, now moves Contact 121 is mobile to static contact 13, until movable contact spring 121 and static contact 13 are conflicted and triggered circuit during static contact 13 and start work Make, now Magnet 131 produces absorption affinity so that slide bar 12 is fixed in switch base 1 to iron block 1211；Because Magnet 131 produces Magnetic force stable, the absorption affinity that iron block 1211 is produced is also stable, and therefore Magnet 131 still can be by iron block after long-term use 1211 absorption, so that the slide bar 12 released by cam 111 resets, extend card cam switch service life；When cam 111 is by slide bar 12 abrasion and need change when, cam 111 is screwed off from threaded rod 112, new cam 111 is arranged on threaded rod 112, Easy to operate.

Embodiment 2：A kind of cam switch, is with the difference of embodiment 1, with reference to Fig. 6 and Fig. 7, in order to by cam 111 are fixed on camshaft 11, are provided with the stopper slot 115 embedding for cam 111, when cam 111 is embedding on camshaft 11 outer wall When entering stopper slot 115, it is threaded with push rod 114 in the axial direction in camshaft 11, camshaft is stretched out in one end of push rod 114 11, the other end is stretched out the cell wall of stopper slot 115 and is conflicted with cam 111, and rotation push rod 114 makes push rod 114 along camshaft 11 axis move, and then push rod 114 cam 111 is fixed between the cell wall of stopper slot 115 and cam 111, in order to enter One step strengthens the fixation of cam 111 so that cam 111 is stably fixed in stopper slot 115, therefore in cam 111 and push rod The position of 114 contacts is provided with the groove 116 embedding for push rod 114（As Fig. 8）；When needing to take out cam 111, turn push rod 114 and then push rod 114 is separated with cam 111, cam 111 is taken out, easy to operate.

Embodiment 3：A kind of cam switch, is with the difference of embodiment 2, with reference to Fig. 9 to Figure 11, in order to by cam 111 are fixed on camshaft 11, are arranged with snap ring 117 and lower snap ring 118 in camshaft 11 outer wall, and overhead cam 1111 is fixing On upper snap ring 117, lower cam 1112 is fixed on lower snap ring 118, upper snap ring 117 is hinged with lower snap ring 118 one end, another End is fastenedly connected so that cam 111 is fastened on cam 111 by bolt 1181；In addition it is provided with camshaft 11 and supply to block The annular groove 119 that ring 117 and lower snap ring 118 embed, it is to avoid upper snap ring 117 is contacted with slide bar 12 with lower snap ring 118, limits in addition Upper snap ring 117 and the movement in the axial direction on camshaft 11 of lower snap ring 118, secure the position of cam 111.

This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model Field technique personnel can make to the present embodiment after reading this specification as needed does not have the modification of creative contribution, but As long as all being protected by Patent Law in right of the present utility model.

Claims (10)

1. a kind of cam switch, including switch base（1）, be fixed on switch base（1）On camshaft（11）, be fixed on camshaft （11）On cam（111）, sliding be connected to switch base（1）Interior slide bar（12）, be fixed on slide bar（12）On movable contact spring （121）And it is fixed on switch base（1）Go up and movable contact spring（121）The static contact being correspondingly arranged（13）, described cam（111）Including Overhead cam（1111）With lower cam（1112）It is characterised in that：Described switch base（1）In static contact（13）Periphery be provided with Magnet （131）, described slide bar（12）On be correspondingly provided with iron block（1211）, work as cam（111）Drive slide bar（12）In switch base（1）Interior cunning When dynamic, described movable contact spring（121）With static contact（13）Separate, work as cam（111）With slide bar（12）When separating, described Magnet （131）The magnetic force producing is by iron block（1211）To near Magnet（131）Direction absorption.

2. a kind of cam switch according to claim 1 it is characterised in that：Described slide bar（12）Towards Magnet（131） Side be provided with extension spring（14）, work as extension spring（14）It is in movable contact spring during original state（121）Triggering static contact（13）.

3. a kind of cam switch according to claim 1 it is characterised in that：Described slide bar（12）With cam（111）Contact Side be provided with tapered protrusion（122）, described tapered protrusion（122）With cam（111）The position of contact is provided with and cam（111） The cambered surface of cooperation（1221）.

4. a kind of cam switch according to claim 1 it is characterised in that：Described camshaft（11）It is provided with cam （111）It is fixed on camshaft（11）On fixing device.

5. a kind of cam switch according to claim 4 it is characterised in that：Described fixing device includes being arranged on camshaft （11）Threaded rod on outer wall（112）, described threaded rod（112）One end and camshaft（11）Threaded, the other end and cam （111）Threaded, work as cam（111）It is fastened on threaded rod（112）When upper, described cam（111）The plane being located and cam Axle（11）Axis vertical.

6. a kind of cam switch according to claim 5 it is characterised in that：Described camshaft（11）On along camshaft（11） Axis be provided with some confession threaded rods（112）The screwed hole connecting（113）.

7. a kind of cam switch according to claim 4 it is characterised in that：Described fixing device includes being arranged on camshaft （11）Confession cam on outer wall（111）Embedded stopper slot（115）, described camshaft（11）It is threaded with push rod along axis （114）, described push rod（114）One end stretch out camshaft（11）, the other end stretches out stopper slot（115）Cell wall and and cam （111）Conflict.

8. a kind of cam switch according to claim 7 it is characterised in that：Described cam（111）With push rod（114）Contact Position be provided with and supply push rod（114）Embedded groove（116）.

9. a kind of cam switch according to claim 4 it is characterised in that：Described fixing device includes being set in camshaft （11）Upper snap ring on outer wall（117）With lower snap ring（118）, described overhead cam（1111）It is fixed on snap ring（117）On, described Lower cam（1112）It is fixed on lower snap ring（118）On, described upper snap ring（117）With lower snap ring（118）One end is hinged, and the other end leads to Cross bolt（1181）It is fastenedly connected.

10. a kind of cam switch according to claim 9 it is characterised in that：Described camshaft（11）It is provided with for upper card Ring（117）With lower snap ring（118）Embedded annular groove（119）.