CN2055986U

CN2055986U - Reversible switch

Info

Publication number: CN2055986U
Application number: CN 89218434
Authority: CN
Inventors: 王效侠
Original assignee: GUANGMING ELECTRICAL EQUIPMENT FACTORY JIASHAN COUNTY ANHUI PROV
Current assignee: GUANGMING ELECTRICAL EQUIPMENT FACTORY JIASHAN COUNTY ANHUI PROV
Priority date: 1989-10-21
Filing date: 1989-10-21
Publication date: 1990-04-11

Abstract

The utility model relates to an HY2-30 reversible switch used for controlling the starting, operation, stop and reversal of a three-phase asynchronous motor by hand. The utility model comprises a rotating shaft connected with a handle, a cam, an idler wheel, a crown bar, a contact bridge, a contact group and a spring. The utility model is characterized in that a yoke is arranged on the side edge of the cam lower than the convex top to replace the clip plate of the existing product to make the components such as idler wheel, etc. not drop off when the handle is in cis-position and the convex top deviates from the idler wheel. The cost of the utility model is 0.4-0.5 Yuan lower than each existing product, the product security and the operational reliability are improved, and the life time of the product is prolonged simultaneously.

Description

Reversible switch

The utility model relates to a kind of electric switch, and a kind of threephase asynchronous that is used for manually controlling of more specifically saying so makes it to start, turn round, stop and reverse two-direction switch.

The existing HY2-30 type two-direction switch of being produced by state specialized factory is made up of bakelite pedestal, operating mechanism and contact system.Its contact system is five groups of dock double break contact groups.Operating mechanism comprises the rotating shaft that links to each other with operating grip, rotating shaft periphery stationary cam, and the cam top is a roller, and the roller center is installed with roller shaft, and roller and roller shaft place the roller groove and the roller axial trough of bakelite pedestal center bottom respectively.The roller top has push rod, push rod to place the push rod slideway of bakelite pedestal central authorities.Spring is placed over against contact bridge in the push rod upper end above contact bridge.Contact is welded at the contact bridge two ends respectively, on the bakelite pedestal of this contact relative position, and fixing two contacts in addition.For make when the rotating operation handle when the protruding top bit of cis-position or inversion, cam departs from roller, parts such as roller are unlikely to come off, and in bakelite pedestal center bottom the metal clamp are set, clamp is fixed by screw, pad and the nut that is embedded in the bakelite pedestal.This product roller shaft diameter is 3mm, and the roller shaft groove width is 6mm, and roller thickness is 6mm.To be unlikely to the amplitude of swinging excessive for the restriction roller, influences regular event, at roller cell wall two ends boss arranged respectively.There is following weak point in this product:

1. because the setting of spacing metal clamp for it has increased hold-down screw, pad and preset the inserts nut when suppressing the bakelite pedestal, makes that this product complex process degree increases, structure is loaded down with trivial details;

2. because interior pre-buried nut and contact plate hold-down screw position of pedestal is approaching, especially in the environment of high humidity, very easily makes and be inserted into insulation breakdown, cause metal shell charged, jeopardize operating personnel's life security;

3. owing to roller shaft and its axial trough excesssive gap, the swing of metal roller makes the bakelite boss at roller cell wall two ends very easily be damaged, to such an extent as to element falling, cisco unity malfunction.Through test, this product fall, along actuating 162500 times after, the apparent damage of its bakelite.

The purpose of this utility model is to avoid the deficiencies in the prior art part, provides a kind of cam that utilizes to replace spacing metal clamp, so that the utility model is unlikely to come off at parts such as any operating state bottom rollers, improves its functional reliability, simplifies product structure.The roller shaft that the purpose of this utility model also is to provide suitable and the fit dimension of roller axial trough change the shape of roller groove, so that bakelite spare is difficult for is impaired, prolong product useful life.

The purpose of this utility model is realized by following technical scheme.

The utility model is made up of bakelite pedestal, operating mechanism and contact system.Its contact system is five groups of dock double break contact groups.Operating mechanism has handle, the rotating shaft that is connected with handle, and rotating shaft periphery stationary cam, the cam top is a roller, and the roller center is installed with roller shaft, and roller and roller shaft place the roller groove and the roller axial trough of bakelite pedestal center bottom respectively.The roller top has push rod, push rod to place the push rod slideway of bakelite pedestal.Spring is placed over against contact bridge in the push rod upper end above contact bridge.Contact is welded at the contact bridge two ends respectively, on the bakelite pedestal of this contact relative position, and fixing two contacts in addition.The cam that is characterised in that of the present utility model, on described cam, the side that is lower than protruding top has the holder shoulder, takes on pair roller with this holder and carries out spacingly, makes it be unlikely to come off.Feature of the present utility model is also to design that the gap is 1mm between roller shaft and roller axial trough, makes roller not have too big swing on left and right directions, does not need spacingly, and therefore, the roller cell wall is a flat segments.

The utility model is compared prior art and is had following advantage:

1. the utility model has reduced metal clamp, insulation cushion, packing ring, screw and inserts nut part with the position-limit mechanism of the shoulder of the holder on cam alternative metals clamp as roller than original product, and every product reduces cost 0.4～0.5 yuan;

2. owing to do not use the inserts nut, thereby thoroughly eliminated because the existence of inserts nut, may cause the hidden danger of insulation breakdown, improved security performance greatly;

3. because pair roller axle and the change of roller axial trough fit dimension and the change of pair roller groove shape improve the mechanical endurance of product greatly.Original product is when " falling ", " suitable " actuating 162500 times, and the bakelite spare at roller groove position is obviously damaged.The utility model is under similarity condition, and when " falling ", " suitable " actuating 203000 times, each parts is still excellent.

Structural representation when Fig. 1 is one group of contact of not commutation of the utility model and operating mechanism " suitable " position;

Fig. 2 is the utility model roller, roller groove, roller shaft and roller shaft groove location schematic cross-section;

Structural representation when Fig. 3 is one group of contact of not commutation of existing procucts and operating mechanism " suitable " position;

Fig. 4 is existing procucts roller, roller groove, roller shaft and roller shaft groove location schematic cross-section.

Number in the figure:

1. spring, 2. contact bridge, 3. push rod, 4. bakelite pedestal, 5. nut, 6. screw, 7. packing ring, 8. insulation, 9. clamp, 10. roller shaft, 11. rollers, 12. cams, 13. rotating shafts, 14. roller groove, 15. roller axial troughs, 16. push rod slideways, 17. holder shoulders, 18. protruding tops, 19. roller cell wall boss.

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment:

Referring to accompanying drawing, adopt the contact system of existing procucts HY2-30 type two-direction switch, parts such as operating grip and spring 1, contact bridge 2, push rod 3, rotating shaft 13.

Referring to accompanying drawing 1, on cam 12, the side that is lower than protruding top 18 has holder shoulder 17, and holder shoulder surface is a circular arc.When operating grip went to " stopping " position, the protruding top 18 of cam 12 was with roller 11 jack-up, and with contact bridge 2 jack-up, corresponding sets of contacts disconnects by push rod 3; When operating grip went to " suitable " position, roller 11 was departed from the protruding top 18 of cam 12, and roller 11 and push rod 3 fall thereupon, by the holder of cam 12 shoulder 17 roller 11 is held, make it to be unlikely to come off, contact bridge 2 is answered spring 1 elastic reset, and the sets of contacts of relevant position is connected.

Referring to accompanying drawing 2, roller 11 thickness are 4mm, and roller shaft 10 diameters are 4mm, and roller axial trough 15 width are 6mm.Roller groove 14 walls are straight.

Present embodiment has reduced the spacing clamp 9 of inserts nut 5, clamp hold-down screw 6 and packing ring 7, clamp insulation spacer 8 and metal in the bakelite pedestal 4 than original product (accompanying drawing 3,4), and has cancelled roller cell wall boss 19.

Claims

1, a kind ofly be used for manually controlling threephase asynchronous, make it starting, running, stop and reverse two-direction switch, be by the bakelite pedestal, operating mechanism and contact system are formed, its contact system is five groups of dock double break contact groups, operating mechanism comprises the rotating shaft (13) that links to each other with operating grip, rotating shaft (13) periphery stationary cam (12), cam (12) top is roller (11), roller (11) center is installed with roller shaft (10), roller (11) and roller (10) place the roller groove (14) and the roller axial trough (15) of bakelite pedestal (4) center bottom respectively, there is push rod (3) roller (11) top, and push rod (3) places the push rod slideway of bakelite pedestal central authorities, and push rod (3) upper end is over against contact bridge (2), contact bridge (2) is gone up and is placed spring (1), contact is welded at contact bridge (2) two ends respectively, on the bakelite pedestal of this contact relative position, and fixing two contacts in addition, it is characterized in that: on cam (12), the side that is lower than protruding top (18) has holder shoulder (17).

2, two-direction switch according to claim 1 is characterized in that described holder shoulder (17) surface is circular arc.

3, two-direction switch according to claim 1 is characterized in that described roller groove (14) wall is straight, and roller (11) thickness is 4mm, and roller shaft (10) diameter is 4mm, and roller axial trough (15) width is 6mm.