CN202905555U

CN202905555U - Rotary switch

Info

Publication number: CN202905555U
Application number: CN 201220616710
Authority: CN
Inventors: 胡文章
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2013-04-24
Anticipated expiration: 2022-11-15

Abstract

The utility model relates to a low cost and long life rotary switch, comprising a housing, and a rotation block disposed in the housing. The rotation block is pivoted in the housing and a rotating shaft of the rotation block extends out of the housing. An arc movable contact spring is disposed on the rotation block. The arc of the movable contact spring is concentric with the rotating shaft. A main contact and a plurality of assistant contacts matched with the movable contact spring and distributed in an arc shape are disposed in the housing. When the rotary switch is used, an end of a main capacitance and an end of a plurality of auxiliary capacitances are connected together to form a common terminal. The other end of the main capacitance is connected with the main contact, and the other end of each auxiliary capacitance is respectively connected with the corresponding assistant contact, and then a motor's two terminals need to connect with capacitances are respectively electrically connected with two ends of the main capacitance. The movable contact spring is driven by rotation of the rotation block, rotation of the movable contact spring makes the movable contact spring be pressed between the main contact and the assistant contact and makes capacitance values between the main contact and the common terminal change in a segmentation manner, thereby changing motor speed to achieve speed regulation effect.

Description

Rotary switch

Technical field

The utility model relates to a kind of rotary switch.

Background technology

Existing rotary selected on-off circuit as shown in Figure 9, be mainly used in electric machine speed regulation, the capacitor C 11 that capacitance is different, C12, C13, C14, C15, the wherein termination common port B other end of C16 is contact head 81 respectively, 82,83,84,85,86, common port B among Fig. 9 and selecting side D connect respectively the binding post of motor coil winding, during the handle of the selector switch outside shell is stretched out in rotation, make the movable end of turning arm D0 select separately respectively contact 81 or 82 or 83 or 84 or 85 or 86 contacts, thereby make the electric capacity between common port B and the selecting side D be respectively C11 or C12 or C13 or C14 or C15 or C16, be that this rotary switch only uses an electric capacity in different gears, when selecting different operation electric capacity, make the rotating speed of motor different, thereby reach the purpose of speed governing, but because only use an electric capacity on its gear, total capacitance value (each capacitance sum) is larger, so its cost is also high; And speed governing electric capacity is connected with inductive coil windings, in each gear handoff procedure, must be first disconnects from a upper gear and be connected to next gear, thereby make inductance coil produce powerful electrical discharge arc and damage contact, shortens its useful life.

Summary of the invention

The purpose of this utility model is the high problem of cost that exists in the existing rotary switch in order to solve, and the rotary switch that a kind of cost is low, the life-span is long is provided.

The purpose of this utility model is achieved in that a kind of rotary switch, comprise shell and be arranged on the interior spill spin block of this shell, described spill spin block is articulated in the described shell and its rotating shaft stretches out described shell, be fixed with the movable contact spring of circular arc at described spill spin block, the circular arc of described movable contact spring is concentric with described rotating shaft, be fixed with main contact and several secondary contacts of the circular-arc distribution that matches with described movable contact spring in the described shell, movable contact spring can electrically contact with main contact and corresponding more than one secondary contact simultaneously when described spill spin block rotates to a certain position.When in single-phase asynchronous motor, using, with main capacitance wherein a wherein end of an end and several secondary electric capacity link together and become common port, the described main contact of another termination of main capacitance, the other end of each secondary electric capacity connects respectively corresponding secondary contact, and then two terminals that need to connect electric capacity on the motor are electrically connected with the main capacitance two ends respectively get final product, rotate described spill spin block and drive described movable contact spring rotation, get final product so that movable contact spring is pressed between described main contact and the described secondary contact, capacitance segmentation between described main contact and the described common port is changed, thereby change motor speed to reach the speed governing effect.

The front portion of described movable contact spring is provided with the front contact of projection.Its effect is when preventing capacitor discharge movable contact spring to be burnt, and prolongs the useful life of movable contact spring.

Described movable contact spring be provided with described spill spin block on the slotting wing that matches of slot.Its benefit is quick and easy for installation.

Owing to having adopted technical scheme described in the utility model, capacitance between described main contact and the described common port is the main contact pushed down of described movable contact spring and each electric capacity capacitance sum of secondary contact, be that the utility model is that one or two or more electric capacity are worked at the same time in use, under the condition of identical speed governing gear, its main capacitance equates with the capacitance that each secondary electric capacity sum equals the maximum capacitor in each gear in the above-mentioned prior art, the electric capacity of the electric capacity that namely joins with each secondary contact each gear in the prior art, the discharge capacity of electric capacity in the gearshift procedure is descended, arc stiffness in shift process also descends, thereby can prolong switch life.Particularly need not the electric current of a upper gear is disconnected in the process that gear switches, inductive coil can not produce electrical discharge arc, and the front contact of projection is set in the front portion of movable contact spring, can further prolong switch life.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the perspective exploded view of an embodiment of rotary switch described in the utility model.

Fig. 2 is the stereogram of each assembling parts of Fig. 1 embodiment after together.

Fig. 3 is the schematic perspective view when being installed in the movable contact spring among Fig. 1 on the spill spin block.

Fig. 4 be spill spin block among Fig. 1 in Fig. 2 with the relative position schematic diagram of positioning bead and spring.

Fig. 5 is the schematic perspective view of main contact among Fig. 1 and secondary contact another angle when being installed on the face-piece.

Fig. 6 is the relative position schematic diagram of movable contact spring in Fig. 5 among Fig. 1.

Fig. 7 has taken the stereogram behind the face-piece away among Fig. 6.

Fig. 8 is the electrical connection schematic diagram of Fig. 1 embodiment when being applied on the single-phase asynchronous motor.

Fig. 9 is that prior art is applied in an electrical connection schematic diagram on the single-phase asynchronous motor.

Among the figure 5, main contact, 61,62,63,64,65, secondary contact, 4, face-piece, 3, movable contact spring, 31, front contact, 32, insert the wing, 2, spill spin block, 21, slot, 22, rotating shaft, 1, drain pan, 7, positioning bead, 70, spring, 20, location notch, E, the center of circle, C0, main capacitance, 30, movable contact spring, A, common port, C1, C2, C3, C4, C5, secondary electric capacity, D, selecting side, D0, turning arm, 81,82,83,84,85,86, contact, C11, C12, C13, C14, C15, C16, electric capacity, B, common port.

Embodiment

See Fig. 1, it is a kind of rotary switch of using as speed governing on the single-phase asynchronous motor that is applied in, comprise the shell that is consisted of by drain pan 1 and face-piece 4 and be arranged on spill spin block 2 in this shell, main contact 5 among Fig. 1 and five

secondary contacts

61,62,63,64,65 usefulness rivets are fixed on (as shown in Figure 5) in the face-piece 4, and the slotting wing 32 on the anterior movable contact spring 3 that is provided with front contact 31 inserts in the slot 21 of spill spin blocks 2, movable contact spring is fixed in the spill spin block, and the through hole that the rotating shaft 22 on the spill spin block 2 passes central authorities on the face-piece 4 stretches out shell as shown in Figure 2 outward.

See Fig. 4, equally distributed location notch 20 is set on the spill spin block outer cylinder, the hoodle 7 that is positioned at one of them location notch, the drain pan that the other end withstands Fig. 1 are withstood in spring 70 the inners, and spill spin block is played positioning action when rotated.

See Fig. 5, the main contact 5 and the

secondary contact

61,62,63,64,65 that are fixedly mounted in the face-piece are distinguished corresponding six gears.

In conjunction with Fig. 7 and Fig. 8, movable contact spring 3 in movable contact spring 30 corresponding diagram 7 among Fig. 8, the center of circle of the movable contact spring 3 of arc in the center of circle E corresponding diagram 7 among Fig. 8, common port A and main contact 5 are electrically connected with the terminals of motor winding respectively, main capacitance C0 and secondary capacitor C 1 among Fig. 8, C2, C3, C4, the C5 right-hand member is the common port A that is connected together, main capacitance C0 and secondary capacitor C 1, C2, C3, C4, the C5 left end connects respectively main contact 5 and

secondary contact

61,62,63,64,65, with the electric circuit diagram of the movable contact spring 3 among Fig. 7 when being rotated counterclockwise front contact 31 and pushing down secondary contact 64 as shown in Figure 8, at this moment, movable contact spring 3 is pushed down main contact 5 and secondary contact 61 simultaneously, 62,63,64, the electric capacity total value between common port A and the main contact 5 is main capacitance C0 and secondary capacitor C 1, C2, C3, C4, five capacitance sums of C5.It namely is the first gear when movable contact spring is pushed down main contact 5 separately, it is the second gear when pushing down simultaneously main contact 5 and secondary contact 61, push down simultaneously main contact 5 and

secondary contact

61,62 o'clock is the 3rd gear, push down simultaneously main contact 5 and

secondary contact

61,62,63 o'clock is the 4th gear, push down simultaneously main contact 5 and

secondary contact

61,62,63,64 o'clock is the 5th gear, push down simultaneously main contact 5 and

secondary contact

61,62,63,64,65 o'clock is the 6th gear, the first gear, the second gear, the 3rd gear, the 4th gear, the 5th gear, the 6th gear respectively electric capacity of correspondence is C0, C0+C1, C0+C1+C2, C0+C1+C2+C3, C0+C1+C2+C3+C4, C0+C1+C2+C3+C4+C5.When from high gear (the large person of capacitance is high gear) to low gear during (capacitance low person be low gear) switching, the capacitance of its switching only is the electric capacity difference between the high to low gear, the discharge capacity that also namely is switched gear is the electric capacity difference of adjacent gear, when for example switching to the 3rd gear from the 4th gear, the discharge capacity value is C3.If it is as follows to satisfy each capacitance parameter of speed governing requirement one: the capacitance of main capacitance C0 is 2uF, the capacitance of secondary capacitor C 1, C2, C3, C4, C5 is 0.5uF, then the discharge capacity of the described rotary switch of the present embodiment when gearshift only is 0.5uF, if when switching to the 3rd gear from the 4th gear, when capacitance switches to 3uF from 3.5uF, the capacitance 0.5uF that its discharge capacity value is C3.Because when reality is used in motor, electric capacity is connected with inductive coil windings, and in the present embodiment, the electric capacity of low gear is to link to each other with coil always when switching to low gear from high gear, be that inductance coil can not cut off the power supply, so the problem of inductance coil discharge can not occur.

Figure 9 shows that electric circuit diagram of the prior art, if control same single-phase asynchronous motor and require each gear speed identical with the prior art among Fig. 9 with the technical solution of the utility model, then the electric capacity of each gear is respectively the first gear C11 among Fig. 9, the second gear C12, the 3rd gear C13, the 4th gear C14, the 5th gear C15, the 6th gear C16, the capacitance of each gear equals respectively the capacitance of each gear among Fig. 8 among Fig. 9, it is C11=C0 that capacitance among Fig. 9 and Fig. 8 closes, C12=C0+C1, C13=C0+C1+C2, C14=C0+C1+C2+C3, C15=C0+C1+C2+C3+C4, C16=C0+C1+C2+C3+C4+C5, when the prior art scheme of Fig. 9 from high gear (the large person of capacitance is high gear) to low gear during (the low person of capacitance be low gear) switching, the capacitance of its switching is the total capacitance value that is switched the capacitance of gear, for example be when switching to the 3rd gear from the 4th gear equally, the discharge capacity value is C14, be the discharge capacity value be C0+C1+C2+C3 (as mentioned above, switch to the 3rd gear from the 4th gear equally, the technical solution of the utility model the discharge capacity value be C3); Prior art will realize satisfying the speed governing requirement equally, and each capacitance parameter is as follows for the moment: the capacitance of capacitor C 11, C12, C13, C14, C15, C16 is respectively 2uF, 2.5uF, 3uF, 3.5uF, 4uF, 4.5uF, if switch to the 3rd gear from the 4th gear equally, when then capacitance switches to 3uF from 3.5uF, the capacitance 3.5uF that its discharge capacity value is C14 is much larger than the 0.5uF of above-described embodiment when identical gear switches.And actual when in motor, using, electric capacity is because connect with inductive coil windings, and in the prior art, when switching to low gear from high gear, the inductance coil of high gear electric capacity and with it series connection thereof must cut off the power supply first, so can produce powerful inductive discharge, produce powerful electric arc, easily burn contact.

So, the electric arc that technical scheme described in the utility model causes in the time of can reducing to discharge between movable contact spring and the secondary contact in shift process, the useful life of prolongation rotary switch.

Claims

1. rotary switch, comprise shell and be arranged on the interior spill spin block of this shell, it is characterized in that described spill spin block is articulated in the described shell and its rotating shaft stretches out described shell, be fixed with the movable contact spring of circular arc at described spill spin block, the circular arc of described movable contact spring is concentric with described rotating shaft, is fixed with main contact and several secondary contacts of the circular-arc distribution that matches with described movable contact spring in the described shell.

2. described rotary switch according to claim 1 is characterized in that the front portion of described movable contact spring is provided with the front contact of projection.

3. described rotary switch according to claim 1 and 2, it is characterized in that described movable contact spring be provided with described spill spin block on the slotting wing that matches of slot.