CN205004201U - Dc speed regulation commutator - Google Patents
Dc speed regulation commutator Download PDFInfo
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- CN205004201U CN205004201U CN201520762227.XU CN201520762227U CN205004201U CN 205004201 U CN205004201 U CN 205004201U CN 201520762227 U CN201520762227 U CN 201520762227U CN 205004201 U CN205004201 U CN 205004201U
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Abstract
The utility model provides a dc speed regulation commutator, including removal frame, first static contact, second static contact, movable contact frame, first moving contact and second moving contact, drive the structrual installation and on moving the frame, when the axial downstream is followed to the removal frame, drive first sound male contact earlier and drive second sound male contact again. The utility model discloses a dc speed regulation switch, through the area of contact of increase second moving contact with the second static contact, the area of contact of switching -over piece and input/output contact piece and the mounting structure of design metallic packaging diode are improved to rational design brake structure, make the utility model discloses a dc speed regulation commutator electric current bearing capacity can reach more than the 30A to can be used for high -power dc speed regulation motor.
Description
Technical field
The utility model relates to DC speed regulation reversing switch technical field, is specifically related to a kind of DC speed regulation reversing switch.
Background technology
DC speed regulation reversing switch is widely used in hand held electric tool field, as electric drill, electric grinder, electric wrench and electric screwdriver etc., it generally comprises housing, for installing the adjustable shelf of control button, the contact assembly of break-make is controlled, for controlling changement that motor turns to and the speed adjusting gear for adjusting rotary speed by adjustable shelf.
Because alternating current machine needs AC power to start, use comparatively inconvenience out of doors, people start to develop some high power DC electric machines that can use out of doors.The switch over-current ability that can be used in DC speed regulation commutation is in the market less, general at below 20A, and the running current of high power DC electric machine is generally at about 25A, therefore develop a kind of direct current speed adjustment switch that can be applicable to big current, become the technology pursue of those skilled in the art.
Utility model content
Therefore, the technical problems to be solved in the utility model is to overcome the technological deficiency that DC speed regulation reversing switch overcurrent ability of the prior art is little, cannot be used for high power DC electric machine, thus provide a kind of overcurrent ability large, can be used in the DC speed regulation reversing switch of high power DC electric machine.
For this reason, the utility model provides a kind of DC speed regulation reversing switch, comprising:
Movable stand, axially can be arranged on housing up or down along self;
First fixed contact, is electrically connected with speed regulating structure;
Second fixed contact, is fixedly installed on the first input contact chip;
Action contact frame, is fixedly mounted on housing, has the input for being electrically connected with a pole of DC power supply;
First moving contact, relative with described first fixed contact, be arranged on described action contact frame by the first mounting structure;
Second moving contact, relative with described second fixed contact, be arranged on described action contact frame by the second mounting structure;
Drive Structure, is arranged on described movable stand, when described movable stand moves vertically straight down, first drives described first moving contact to contact with described first fixed contact, and then drives described second moving contact to contact with described second fixed contact; When described movable stand moves vertically straight up, first drive described second moving contact to separate with described second fixed contact, and then drive described first moving contact to separate with described first fixed contact;
Contact area when described first moving contact contacts with described first fixed contact is less than contact area when described second moving contact contacts with described second fixed contact.
As a kind of preferred version: described first moving contact, described second moving contact, described first fixed contact and described second fixed contact are equipped with columniform bubble point or silver contact.
As a kind of preferred version: described first moving contact has the first flat segments, and be connected with described first flat segments and obtuse-angulate first bending segment of shape;
Described first mounting structure comprises and is located on described first flat segments or described first bending segment two relatively and contrary the first mounting groove of opening direction, to be located on described action contact frame and two first of the described first mounting groove inside of insertion two can be coordinated respectively to install protruding, installing to be formed between projections for two described first and first notch is installed for what install described first moving contact; And/or
Described second moving contact has the second flat segments, and is connected with described second flat segments and obtuse-angulate second bending segment of shape;
Described second mounting structure comprises and is located on described second flat segments or described second bending segment two relatively and contrary the second mounting groove of opening direction, to be located on described action contact frame and two second of the described second mounting groove inside of insertion two can be coordinated respectively to install protruding, installing to be formed between projections for two described second and second notch is installed for what install described second moving contact.
As a kind of preferred version: described Drive Structure comprises the first Drive Structure for driving described first moving contact action, with for driving the second Drive Structure of described second moving contact action;
Described first Drive Structure comprises the first installing hole be opened on described movable stand, be located at the first stage clip of described first installing hole inside, and be arranged on described first installing hole inside and the first guide pillar supported by described first stage clip, described first guide pillar is resisted against on described first moving contact under the supporting role of described first stage clip, and follows described movable stand and move up and down to drive described first moving contact contact with described first fixed contact or disconnect;
Described second Drive Structure comprises the second installing hole be opened on described movable stand, be located at the second stage clip of described second installing hole inside, and be arranged on described second installing hole inside and the second guide pillar supported by described second stage clip, described second guide pillar is resisted against on described second moving contact under the supporting role of described second stage clip, and follows described movable stand and move up and down to drive described second moving contact contact with described second fixed contact or disconnect;
Described first fixed contact and described first moving contact, when described second fixed contact and described second moving contact are all in off-state, described first guide pillar and the described first distance of installing between projection are less than described second guide pillar and described second and install distance between projection.
As a kind of preferred version: also comprise brake structure, described brake structure comprises:
Mounting groove, is axially disposed within described movable stand along described movable stand;
Brake block, described mounting groove can be arranged on movably along described movable stand axial stretching inner by the second elastic component, have and input the first relative contact portion of contact chip with first, and input the second relative contact portion of contact chip with second for being electrically connected with an other pole of described DC power supply; And
Crushing block, is fixedly installed on described movable stand, for stopping that described brake block is to compress described second elastic component thus to be fixed between described mounting groove and described crushing block by described brake block extruding;
When described movable stand is moved upward to primary importance vertically, described first contact portion and described second contact portion input contact chip and described second respectively and input contact chip and extrude to contact and be connected under the elastic force effect of described second elastic component with described first;
When described movable stand is moved downward to the second place vertically, described first contact portion and described second contact portion input contact chip and described second respectively and input contact chip and separate under the barrier effect of described crushing block with described first.
As a kind of preferred version: described first contact portion towards described first input contact chip end face on and/or described second contact portion towards described second input contact chip end face be provided with bubble point or silver contact.
As a kind of preferred version: described brake block comprises U-bend flap, and the first contact portion be separately positioned on two side plate free ends of described U-bend flap and the second contact portion;
Shown in two side plate gaps of U-bend flap be arranged in the installing space that formed by described crushing block and described mounting groove inwall; And described first contact portion and the mobile space that has between described second contact portion and described mounting groove along described movable stand axis.
As a kind of preferred version, also comprise commutating structure, described commutating structure comprises:
Shaft hole, is arranged on the housing;
First sliding contact surface, is arranged on the first input contact chip;
Second sliding contact surface, is arranged on the second input contact chip;
First exports contact chip, and fixed installation on the housing, has the first output stretching out in described housing, and be bent to form two the 3rd sliding contact surfaces;
Second exports contact chip, and fixed installation on the housing, has the second output stretching out in described housing, and the 4th sliding contact surface be bent to form;
Fork, has and can insert in described shaft hole and the rotating shaft that is installed in rotation on described housing, and is arranged on the first commutation slide block on described fork and the second commutation slide block by the first elastic component;
When described fork turns to primary importance, under the elastic force effect of described first elastic component, described first commutation slide block is resisted against on described first sliding contact surface and described 3rd sliding contact surface simultaneously, and described second commutation slide block is resisted against on described second sliding contact surface and the 4th sliding contact surface simultaneously;
When described fork turns to the second place, under the elastic force effect of described first elastic component, described first commutation slide block is resisted against on described first sliding contact surface and described 4th sliding contact surface simultaneously, and described second commutation slide block is resisted against on described second sliding contact surface and the 3rd sliding contact surface described in another simultaneously.
As a kind of preferred version: at the marginal position of described 3rd sliding contact surface and/or described 4th sliding contact surface, be also provided with arc-shaped transition curved surface.
As a kind of preferred version: the accommodation space forming accommodating installation plastic package diode between described first input contact chip and described second input contact chip, described first input contact chip is provided with the first installation portion being suitable for the one end of detachably installing plastic package diode, and described second input contact chip is provided with the second installation portion being suitable for detachably installing the other end of described plastic package diode;
As a kind of preferred version: also comprise support bar, it is inner and first input the insertion section that contact chip is fixedly connected with that described support bar has insertion first installation portion, and the supporting surface for being welded to connect with the bottom surface of metallic packaging diode, the second input contact chip has the joint face be welded to connect with the end face of metallic packaging diode.
A kind of DC speed regulation reversing switch that the utility model provides, has the following advantages:
1. DC speed regulation reversing switch of the present utility model, contact area when first moving contact contacts with the first fixed contact is less than contact area when the second moving contact contacts with the second fixed contact, when movable stand moves down vertically, first Drive Structure drives the first moving contact to contact with the first fixed contact, and then drive the second moving contact to contact with the second fixed contact, because the first fixed contact is connected with speed regulating structure, first moving contact is prior to after the first fixed contact contact, speed regulating structure obtains small electric stream drive motor and rotates, and makes motor start-up steady; Continue in the process pressed down at movable stand, second moving contact contacts with the second fixed contact, when installing space is certain, reduce the volume of the silver contact that the first fixed contact and the first moving contact configure, the space of larger installation silver contact can be provided for the second fixed contact and the second moving contact, increase the contact area of silver contact between the second fixed contact and the second moving contact, thus can provide more big current for motor, can be used in high power direct-current motor.
2. DC speed regulation reversing switch of the present utility model, first moving contact and the second moving contact are all arranged on action contact frame with seesaw form, first guide pillar or the second guide pillar are arranged on movable stand by the first stage clip or the second stage clip, when the first guide pillar or the second guide pillar follow movable stand move time, the first moving contact can be promoted with the quick disjunction of the second moving contact or contact, be swift in motion, good reliability and installation difficulty is little; Moving contact of the prior art uses Extension Spring-type structure mostly, need in the middle part of moving contact, offer the location notch connecting extension spring, this can reduce the contact-making surface of moving contact, reduce switch loaded current ability, and the assembly difficulty of Extension Spring-type structure is large, slow in electric disjunction hourly velocity, switch is short for useful life.
3. DC speed regulation reversing switch of the present utility model, brake block is arranged on mounting groove inside, and fixed by crushing block and the second elastic member presses, when movable stand moves to primary importance, first brake contact point and the second brake contact point can input contact chip and second respectively and input contact chip close contact and be connected under the elastic force effect of the second elastic component with first, thus short circuit can be realized immediate stability, brake is rapidly.Further, first contact portion towards first input contact chip end face on and/or the second contact portion towards second input contact chip end face be provided with bubble point or silver contact, when braking, the induced current produced due to high power direct-current motor is also larger, two contact portions arrange bubble point or silver contact respectively, conveyance capacity during braking can be increased further, not easy burn-out brake block, thus can be applicable to the DC motor with relatively high power.
4. DC speed regulation reversing switch of the present utility model, brake block comprises U-bend flap, two side plate gaps of U-bend flap are arranged in the installing space between crushing block and mounting groove inwall, installing space not only allows U-bend flap to move up and down, can also lead to its movement, prevent skew; The free end of two side plates is respectively equipped with the first contact portion and the second contact portion, first contact portion and the second contact portion are respectively equipped with the first input contact point and the second input contact point, first input contact point and the second input contact point can be bubble point or silver point, it can improve conveyance capacity when braking, the also not easy burn-out brake block when the induced current that motor produces is larger.
5. DC speed regulation reversing switch of the present utility model, first input contact chip has been bent to form the first sliding contact surface, second input contact chip has been bent to form the second sliding contact surface, export on contact chip first and be bent to form two the 3rd sliding contact surfaces, second input contact chip has been bent to form the 4th sliding contact surface, first commutation slide block is resisted against on the first sliding contact surface and the 3rd sliding contact surface simultaneously, when second commutation slide block is resisted against on the second sliding contact surface and the 4th sliding contact surface simultaneously, between face and face, the way of contact adds contact area, further increase current carrying capacity, larger electric current can be inputted for motor, thus more powerful DC motor is applicable to.
6. DC speed regulation reversing switch of the present utility model, the fixed part being fixed on main part two ends of the first commutation slide block and/or the second commutation slide block inserts the interior installation of fixing hole of fork, when fork swings, the first commutation slide block and the second commutation slide block can not drop downwards, good stability.
7. DC speed regulation reversing switch of the present utility model, at the marginal position of the 3rd sliding contact surface and the 4th sliding contact surface, is also provided with arc-shaped transition curved surface; When rotational swing rod is to commutate, arc-shaped transition curved surface can provide smooth surface for the movement of the slide block that commutates, and commutation fluent movements are stablized.
8. DC speed regulation reversing switch of the present utility model, first input contact chip is provided with the first mounting groove being suitable for the one end of detachably installing diode, second input contact chip is provided with the second mounting groove being suitable for the other end detachably installing diode, and between the first input contact chip and the second input contact chip, form the accommodation space of accommodating above-mentioned diode, the diode of the various sizes specification of metallic packaging or plastic packaging can be installed, extend the scope of application, and when configuring the diode of metallic packaging, the diode of metallic packaging and first inputs contact chip and second and inputs contact chip and be directly welded to connect, by the first input contact chip and the second input contact chip heat radiation, thus improve the afterflow ability of metal-oxide-semiconductor, powerful DC motor can be applicable to.
9. direct current speed adjustment switch of the present utility model, by increasing the contact area of the second moving contact and the second fixed contact, appropriate design brake structure, improve the contact area of commutator segment and input and output contact chip and design the mounting structure of metallic packaging diode, make DC speed regulation reversing switch current carrying capacity of the present utility model to reach more than 30A, thus can be used in high power DC buncher.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in prior art or the utility model embodiment, the accompanying drawing used in describing prior art or embodiment is below briefly described, apparently, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the overall structure figure of DC speed regulation reversing switch in the utility model embodiment.
Fig. 2 is the stereogram after Fig. 1 middle shell separates.
Fig. 3 is another three-dimensional view of Fig. 2.
The installation site graph of a relation that Fig. 4 is the first input contact chip, the second input contact chip, first exports contact chip, the second input contact chip and fork.
Fig. 5 is the structural blast schematic diagram of fork in Fig. 4.
Fig. 6 is the stereogram after movable stand, the first input contact chip, the second input contact chip and brake block combination.
Fig. 7 is the structural blast schematic diagram of movable stand in Fig. 6.
Fig. 8 is the stereogram after movable stand, the first input contact chip, action contact frame, the first fixed contact, the second fixed contact, the first moving contact and the second moving contact combination.
Fig. 9 is the structural blast schematic diagram of Fig. 8.
Figure 10 is the stereogram after the first moving contact in Fig. 8, the second moving contact and action contact frame combine.
Figure 11 is the structural blast schematic diagram of Figure 10.
Figure 12 is the installation site graph of a relation that plastic package diode and first inputs that contact chip and second inputs contact chip.
Figure 13 is the installation site graph of a relation that metallic packaging diode and first inputs that contact chip and second inputs contact chip.
Figure 14 is the part-structure exploded perspective view of Figure 13.
Reference numeral: 1-housing, 10-shaft hole, 2-first inputs contact chip, 21-first sliding contact surface, 22-first installation portion, 3-second inputs contact chip, 31-second sliding contact surface, 32-second installation portion, 4-first inputs contact chip, 41-the 3rd sliding contact surface, 5-second exports contact chip, 51-the 4th sliding contact surface, 6-fork, 61-rotating shaft, 62-first elastic component, 63-first commutates slide block, 64-second commutates slide block, 65-main part, 66-fixed part, 67-fixing hole, 7-movable stand, the protruding post of 701-, 702-back-moving spring, 71-mounting groove, 72-brake block, 721-U shape bending plate, 722-side plate, 723-first contact portion, 724-second contact portion, 725-first brake contact point, 726-second brakes contact point, 73-crushing block, 741-first installing hole, 742-first stage clip, 743-first guide pillar, 751-second installing hole, 752-second stage clip, 753-second guide pillar, 80-brace, 81-first fixed contact, 82-second fixed contact, 83-action contact frame, 831-first installs notch, 832-first installs projection, 833-second installs notch, 834-second installs projection, 835-first inclined-plane, 836-second inclined-plane, 84-first moving contact, 841-first flat segments, 842-first bending segment, 843-first mounting groove, 85-second moving contact, 851-second flat segments, 852-second bending segment, 853-second mounting groove, 9-plastic package diode, 90-support bar, 91-metallic packaging diode, 92-insertion section, 93-supporting surface.
Embodiment
Be described the technical solution of the utility model below in conjunction with Figure of description, obviously, following embodiment is not the whole embodiment of the utility model.Based on the embodiment described by the utility model, those of ordinary skill in the art, not making the every other embodiment obtained under other creative work prerequisites, belong to protection range of the present utility model.
It should be noted that, in description of the present utility model, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.In addition, if below in the described different execution mode of the utility model involved technical characteristic do not form conflict each other and just can be combined with each other.
Embodiment
The present embodiment provides a kind of DC speed regulation reversing switch, as Fig. 1-3,6, shown in 8-11, comprise: movable stand 7, can be axially movably arranged on housing 1 by back-moving spring 702, back-moving spring installing hole is provided with bottom movable stand 7, be provided with back-moving spring 702 in reset installing hole, one end of stretching out reset installing hole of back-moving spring 702 is set on protruding post 701; Axially can be arranged on housing 1 up or down along self; First fixed contact 81, is fixedly installed on the brace 80 that is connected with speed regulating structure; Second fixed contact 82, is fixedly installed on the first input contact chip 2; Action contact frame 83, is fixedly mounted on described housing 1, has the input 830 be connected with the positive pole of described DC power supply; First moving contact 84, relative with described first fixed contact 81, be arranged on described action contact frame 83 by the first mounting structure; Second moving contact 85, relative with described second fixed contact 82, be arranged on described action contact frame 83 by the second mounting structure;
Drive Structure, is arranged on described movable stand 7, when movable stand 7 moves vertically straight down, first drives the first moving contact 84 to contact with the first fixed contact 81, and then drives the second moving contact 85 to contact with the second fixed contact 82; When described movable stand 7 moves vertically straight up, first drive described second moving contact 85 to separate with described second fixed contact 82, and then drive described first moving contact 84 to separate with described first fixed contact 81.
Contact area when described first moving contact 84 contacts with described first fixed contact 81 is less than contact area when described second moving contact 85 contacts with described second fixed contact 82.
DC speed regulation reversing switch in the present embodiment can provide the principle of larger input current as follows for motor:
Contact area when first moving contact 84 contacts with the first fixed contact 81 is less than contact area when the second moving contact 85 contacts with the second fixed contact 82, when movable stand 7 moves down vertically, first Drive Structure drives the first moving contact 84 to contact with the first fixed contact 81, and then drive the second moving contact 85 to contact with the second fixed contact 82, because the first fixed contact 81 is connected with speed regulating structure by brace 80, the first moving contact 84 that contact area is less first contacts with the first fixed contact 81, speed regulating structure obtains small electric stream drive motor and rotates, make motor start-up steady, continue in the process moved down vertically at movable stand 7, second moving contact 85 contacts with the second fixed contact 82, when installing space is certain, reduce the volume of the silver contact of configuration on the first fixed contact 81 and the first moving contact 84, the space of larger installation silver contact can be provided for the second fixed contact 82 and the second moving contact 85, increase the contact area of silver contact between the second fixed contact 82 and the second moving contact 85, after second fixed contact 82 contacts with the second moving contact 85, be equivalent to speed regulating structure short circuit, now DC power supply directly by the second fixed contact 82 and the second moving contact 85 for DC motor is powered, because contact area is large, thus more big current can be provided for motor, for high power direct-current motor.
As shown in figs. 10-11, the first moving contact 84 has the first flat segments 841, and is connected with described first flat segments 841 and obtuse-angulate first bending segment 842 of shape; Described first mounting structure comprises and is located in described first flat segments 841 two relatively and contrary the first mounting groove 843 of opening direction, to be located on described action contact frame 83 and two first of described first mounting groove 843 inside of insertion two can be coordinated respectively to install protruding 832, two described first and install to be formed between protruding 832 and first notch 831 is installed for what install described first moving contact 84.
Described second moving contact 85 has the second flat segments 851, and is connected with described second flat segments 851 and obtuse-angulate second bending segment 852 of shape; Described second mounting structure comprises and is located in described second flat segments 851 two relatively and contrary the second mounting groove 853 of opening direction, to be located on described action contact frame 83 and two second of described second mounting groove 853 inside of insertion two can be coordinated respectively to install protruding 834, two described second and install to be formed between protruding 834 and second notch 833 is installed for what install described second moving contact 85.
As a kind of deformation program, above-mentioned first mounting groove 843 also can be arranged on the first bending segment 842, and the second mounting groove 853 also can be arranged on the second bending segment 852.
As shown in Figure 9, described Drive Structure comprises the first Drive Structure for driving described first moving contact 84 action, and for driving the second Drive Structure of described second moving contact 85 action.
Described first Drive Structure comprises the first installing hole 741 be opened on described movable stand 7, be located at the first stage clip 742 of described first installing hole 741 inside, and be arranged on described first installing hole 741 inside and the first guide pillar 743 supported by described first stage clip 742, described first guide pillar 743 is resisted against on described first moving contact 84 under the supporting role of described first stage clip 742, and follow described movable stand 7 and move up and down to drive described first moving contact 84 to install in notch 831 first to make seesaw type tectonic movement, thus contact with described first fixed contact 81 or disconnect.
Described second Drive Structure comprises the second installing hole 751 be opened on described movable stand 7, be located at the second stage clip 752 of described second installing hole 751 inside, and be arranged on described second installing hole 751 inside and the second guide pillar 753 supported by described second stage clip 752, described second guide pillar 753 is resisted against on described second moving contact 85 under the supporting role of described second stage clip 752, and follow described movable stand 7 and move up and down to drive described second moving contact 85 to install in notch 833 second to make seesaw type tectonic movement, thus contact with described second fixed contact 82 or disconnect.
Described first guide pillar 743 is positioned at sustained height with described second guide pillar 753, described first height installing notch 831 installs the height of notch 833 higher than described second, with when described movable stand 7 moves vertically straight down, first drive described first moving contact 84 to contact with described first fixed contact 81, and then drive described second moving contact 85 to contact with described second fixed contact 82; When described movable stand 7 moves vertically straight up, first drive described second moving contact 85 to separate with described second fixed contact 82, and then drive described first moving contact 84 to separate with described first fixed contact 81.
As a kind of deformation program, also can arrange described first and install notch 831 and described second and install notch 833 and be positioned at sustained height, the height of described first guide pillar 743, lower than the height of described second guide pillar 753, can realize substantially identical technique effect equally.
In fact, as long as at described first fixed contact 81 and described first moving contact 84, when described second fixed contact 82 and described second moving contact 85 are all in off-state, control described first guide pillar 743 and described first distance of installing between protruding 832 to be less than described second guide pillar 753 and described second distance between protruding 834 is installed, just can reach the technique effect that the control of above-mentioned priority contacts or separates.
As shown in Figure 9, DC speed regulation reversing switch in the present embodiment, the first input contact chip 2 has the one end arranging the first fixed contact 81, is provided with the other end of the first sliding contact surface 21, described one end and the described other end, to same direction 90-degree bent, form the installing space of movable stand 7.
As shown in figure 11, the both sides for first installation notch 831 bottom surface of installing the first moving contact 84 of action contact frame 83 are provided with the first inclined-plane 835, with described first moving contact 84 by during drive actions to contact with the first bending section 842 with the first flat segments 841 respectively, increase contact area, improve electric current conveying capacity, the effect on the second inclined-plane 836 is similar, repeats no more.
The direct current speed adjustment switch of the present embodiment, also includes brake structure, as shown in fig. 6-7, comprising: mounting groove 71, is axially disposed within described movable stand 7 along described movable stand 7; Brake block 72, can be arranged in described mounting groove 71 movably along movable stand 7 axial stretching by the second elastic component (not shown), have and input the first relative contact portion 723 of contact chip 2 with first, and with for inputting the second relative contact portion 724 of contact chip 3 with the negative electricity of DC power supply is connected second; And crushing block 73, be fixedly installed on described movable stand 7, for stopping that described brake block 72 is to compress described second elastic component thus to be fixed between described mounting groove 71 and described crushing block 73 by described brake block 72 extruding; First brake contact point 725, is arranged on described brake block 72, and with described first to input contact chip 2 relative; First brake contact point 726, is arranged on described brake block 72, and with described second to input contact chip 3 relative.
In the present embodiment, the brake principle of brake structure is as follows:
When described movable stand 7 is moved upward to primary importance vertically, described first brake contact point 725 inputs contact chip 2 and extrudes to contact and connect under the elastic force effect of described second elastic component with described first, described second brake contact point 726 inputs contact chip 3 and extrudes to contact and connect under the elastic force effect of described second elastic component with described second, first input contact chip 2 and the second input contact chip 3 are because of the short circuit by brake block 72 short circuit, (motor receives the electric current of the first output 40 and the output of the second output 50 and rotates to produce dynamic braking effect, when power source, motor becomes generator, the current drain that engine produces can fall rapidly by short circuit first output 40 and the second output 50, thus make rapidly motor stop operating, realize brake),
When described movable stand 7 is moved downward to the second place vertically, described first brake contact point 725 and described first inputs contact chip 2 to be separated, described second brake contact point 726 and described second inputs contact chip 3 to be separated, now the first input contact chip 2 and the second input contact chip 3 no longer short circuit, normally work after motor received current running.
First brake contact point 725 and the second brake contact point 726 can input contact chip 2 and second respectively and input contact chip 3 close contact and be connected under the elastic force effect of the second elastic component with first, thus immediate stability realize short circuit.
The induced current produced due to high power direct-current motor is also larger, first input contact point 725 and second is set and inputs contact point 726 for silver point, conveyance capacity during braking can be increased, not easy burn-out brake block 72, be applicable to the DC motor with relatively high power.
As a kind of deformation program, the first input contact point 725 and the second input contact point 726 also can be bubble point.
As shown in Figure 7, described brake block 72 comprises U-bend flap 721, and two side plate 722 gaps of shown U-bend flap 721 are arranged on by being formed in installing space between described crushing block 73 and described mounting groove 71 inwall; The free end of two described side plates 722 is respectively equipped with the first contact portion 723 and the second contact portion 724, the end face towards described first input contact chip 2 of described first contact portion 723 is provided with described first brake contact point 725, and the end face towards described second input contact chip 3 of described second contact portion 724 is provided with described second brake contact point 726; Between the bottom surface of described first contact portion 723 and described second contact portion 724 and described mounting groove 71, there is mobile space.Above-mentioned installing space can lead to moving up and down of U-bend flap 721, prevents skew; The free end of two side plates 722 being respectively equipped with the first contact portion 723 and the second contact portion 724, is that the setting of the first input contact point 725 and the second input contact point 726 provides larger space.
It should be noted that, before movable stand 7 moves down to connect the first moving contact 84 and the first fixed contact 81, brake block 72 is followed movable stand 7 and is moved down, and first brake contact point 725 and first inputs contact chip 2 to be separated, and the second brake contact point 726 and second inputs contact chip 3 to be separated; When movable stand 7 moves up to make the first moving contact 84 and the first fixed contact 81 separate, brake block 72 is followed on movable stand 7 and is moved, first brake contact point 725 and first inputs contact chip 2 and contacts and connect, and the second brake contact point 726 and second inputs contact chip 3 and contacts and connect.
DC speed regulation reversing switch in the present embodiment, also includes commutating structure, as Figure 1-5, comprising: shaft hole 10, is arranged on housing 1; First sliding contact surface 21, is arranged on the first input contact chip 2, is electrically connected with the positive pole of DC power supply; Second sliding contact surface 31, is arranged on the second input contact chip 3, is connected with the negative electricity of described DC power supply; First exports contact chip 4, is fixedly mounted on described housing 1, has the first output 40 stretching out in described housing 1, and be bent to form two the 3rd sliding contact surfaces 41; Second exports contact chip 5, is fixedly mounted on described housing 1, has the second output 50 stretching out in described housing 1, and the 4th sliding contact surface 51 be bent to form; Fork 6, is had the rotating shaft 61 can inserted and be installed in rotation on described housing 1 in described shaft hole 10, and is arranged on the first commutation slide block 63 and the second commutation slide block 64 on described fork 6 by the first elastic component 62 telescopically.
In the present embodiment, the reversing principle of DC speed regulation reversing switch is as follows:
When described fork 6 turns to primary importance (Fig. 4 shows position), under the elastic force effect of the first elastic component 62, described first commutation slide block 63 is resisted against on described first sliding contact surface 21 and described 3rd sliding contact surface 41 (diagram right side) simultaneously, makes the first output 40 outwards output cathode of the first output contact chip 4; Described second commutation slide block 64 is resisted against on described second sliding contact surface 31 and the 4th sliding contact surface 51 simultaneously, makes the second output 50 outwards output negative pole of described second output contact chip 5;
When described fork 6 turns to the second place, under the elastic force effect of the first elastic component 62, described first commutation slide block 63 is resisted against on described first sliding contact surface 21 and described 4th sliding contact surface 51 simultaneously, makes the second output 50 outwards output cathode of described second output contact chip 5; Described second commutation slide block 64 is resisted against on described second sliding contact surface 31 and the 3rd sliding contact surface 41 described in another simultaneously, makes the first output 40 outwards output negative pole of the first output contact chip 4.
The DC speed regulation reversing switch of the present embodiment, first sliding contact surface 21, second sliding contact surface 31, 3rd sliding contact surface 41 and the 4th sliding contact surface 51 are and are bent to form, have larger for the area with commutation shoe contact, thus when the first commutation slide block 63 is resisted against on the first sliding contact surface 21 and the 3rd sliding contact surface 41 simultaneously, when second commutation slide block 64 is resisted against on the second sliding contact surface 31 and the 4th sliding contact surface 41 simultaneously, the way of contact between face and face adds contact area, improve current carrying capacity, can be used in the operating mode that electric current is larger, extend the scope of application.
As shown in Figure 4, at the marginal position of described 3rd sliding contact surface 41 and described 4th sliding contact surface 51, arc-shaped transition curved surface 42 is also provided with.When rotational swing rod 6 is to commutate, arc-shaped transition curved surface 42 can provide smooth surface for the movement of the slide block that commutates, and commutation fluent movements are stablized.
As shown in Figure 5, the first commutation slide block 63 and the second commutation slide block 64 all have main part 65, and are arranged on main part 65 two ends and the fixed part 66 extended to fork 6 side, and described fork 6 is provided with and inserts for described fixed part 66 fixing hole 67 installed.Fixed part 66 to insert in fixing hole 67 thus is arranged on after on fork 6 by commutation slide block, and when fork 6 rotates to commutate, commutation slide block can not fall, and thus uses and stablizes.
As shown in figure 12, the accommodation space of the described plastic package diode 9 of accommodating installation is formed between described first input contact chip 2 and described second input contact chip 3, described first input contact chip 2 is provided with the first installation portion 22 being suitable for the one end of detachably installing plastic package diode 9, and described second input contact chip 3 is provided with the second installation portion 32 being suitable for detachably installing the other end of described plastic package diode 9.When the two ends up and down of plastic package diode 9 are all suitable for being fit into first installation portion 22 and second installation portion 32, the DC speed regulation reversing switch in the present embodiment can install the plastic package diode 9 of all size size.
As illustrated in figs. 13-14, the DC speed regulation reversing switch of the present embodiment can also install the diode 91 of metallic packaging, it is inner and first input the insertion section 92 that contact chip 2 is fixedly connected with that support bar 90 has insertion first installation portion 22, and input for the supporting surface 93, second be welded to connect with the bottom surface of metallic packaging diode 91 joint face contact chip 3 having and is welded to connect with the end face of metallic packaging diode 91.Metallic packaging diode 91 and first inputs contact chip 2 and second and inputs contact chip 3 and be directly welded to connect, dispelled the heat by the first input contact chip 2 and the second input contact chip 3, thus improve the afterflow ability of metal-oxide-semiconductor (speed regulating structure), powerful DC motor can be applicable to.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among the protection range of the invention.
Claims (11)
1. a DC speed regulation reversing switch, is characterized in that: comprise
Movable stand (7), axially can be arranged on housing (1) along self up or down;
First fixed contact (81), is electrically connected with speed regulating structure;
Second fixed contact (82), is fixedly installed on the first input contact chip (2);
Action contact frame (83), is fixedly mounted on housing (1), has the input (830) for being electrically connected with a pole of DC power supply;
First moving contact (84), relative with described first fixed contact (81), be arranged on described action contact frame (83) by the first mounting structure;
Second moving contact (85), relative with described second fixed contact (82), be arranged on described action contact frame (83) by the second mounting structure;
Drive Structure, be arranged on described movable stand (7), when described movable stand (7) moves vertically straight down, first drive described first moving contact (84) to contact with described first fixed contact (81), and then drive described second moving contact (85) to contact with described second fixed contact (82); When described movable stand (7) moves vertically straight up, first drive described second moving contact (85) to separate with described second fixed contact (82), and then drive described first moving contact (84) to separate with described first fixed contact (81);
Contact area when described first moving contact (84) contacts with described first fixed contact (81) is less than contact area when described second moving contact (85) contacts with described second fixed contact (82).
2. DC speed regulation reversing switch according to claim 1, is characterized in that:
Described first moving contact (84), described second moving contact (85), described first fixed contact (81) and described second fixed contact (82) are equipped with columniform bubble point or silver contact.
3. DC speed regulation reversing switch according to claim 2, is characterized in that:
Described first moving contact (84) has the first flat segments (841), and is connected with described first flat segments (841) and obtuse-angulate first bending segment (842) of shape;
Described first mounting structure comprises and is located on described first flat segments (841) or described first bending segment (842) two relatively and contrary the first mounting groove (843) of opening direction, be located at described action contact frame (83) upper and inner two first of described first mounting groove (843) of insertion two can be coordinated respectively to install protruding (832), install to be formed between protruding (832) for two described first and first notch (831) is installed for what install described first moving contact (84); And/or
Described second moving contact (85) has the second flat segments (851), and is connected with described second flat segments (851) and obtuse-angulate second bending segment (852) of shape;
Described second mounting structure comprises and is located on described second flat segments (851) or described second bending segment (852) two relatively and contrary the second mounting groove (853) of opening direction, be located at described action contact frame (83) upper and inner two second of described second mounting groove (853) of insertion two can be coordinated respectively to install protruding (834), install to be formed between protruding (834) for two described second and second notch (833) is installed for what install described second moving contact (85).
4. DC speed regulation reversing switch according to claim 3, it is characterized in that: described Drive Structure comprises the first Drive Structure for driving the action of described first moving contact (84), and for driving the second Drive Structure of described second moving contact (85) action;
Described first Drive Structure comprises the first installing hole (741) be opened on described movable stand (7), be located at the first stage clip (742) that described first installing hole (741) is inner, and be arranged on described first installing hole (741) inside and the first guide pillar (743) supported by described first stage clip (742), described first guide pillar (743) is resisted against on described first moving contact (84) under the supporting role of described first stage clip (742), and follow described movable stand (7) and move up and down to drive described first moving contact (84) contact with described first fixed contact (81) or disconnect,
Described second Drive Structure comprises the second installing hole (751) be opened on described movable stand (7), be located at the second stage clip (752) that described second installing hole (751) is inner, and be arranged on described second installing hole (751) inside and the second guide pillar (753) supported by described second stage clip (752), described second guide pillar (753) is resisted against on described second moving contact (85) under the supporting role of described second stage clip (752), and follow described movable stand (7) and move up and down to drive described second moving contact (85) contact with described second fixed contact (82) or disconnect,
Described first fixed contact (81) and described first moving contact (84), when described second fixed contact (82) and described second moving contact (85) are all in off-state, described first guide pillar (743) and described first distance of installing between protruding (832) is less than described second guide pillar (753) and described second and installs distance between projection (834).
5. DC speed regulation reversing switch according to claim 1, is characterized in that: also comprise brake structure, and described brake structure comprises:
Mounting groove (71), is axially disposed within described movable stand (7) along described movable stand (7);
Brake block (72), described mounting groove (71) can be arranged on movably along described movable stand (7) axial stretching inner by the second elastic component, have and input relative the first contact portion (723) of contact chip (2) with first, and with for inputting relative the second contact portion (724) of contact chip (3) with an other pole of described DC power supply is electrically connected second; And
Crushing block (73), be fixedly installed on described movable stand (7), for stopping that described brake block (72) is to compress described second elastic component thus to be fixed between described mounting groove (71) and described crushing block (73) by described brake block (72) extruding;
When described movable stand (7) is moved upward to primary importance vertically, described first contact portion (723) and described second contact portion (724) input contact chip (2) and described second respectively and input contact chip (3) and extrude to contact and be connected under the elastic force effect of described second elastic component with described first;
When described movable stand (7) is moved downward to the second place vertically, described first contact portion (723) and described second contact portion (724) input contact chip (2) and described second respectively and input contact chip (3) and separate under the barrier effect of described crushing block (73) with described first.
6. DC speed regulation reversing switch according to claim 5, is characterized in that: described first contact portion (723) towards described first input contact chip (2) end face on and/or described second contact portion (724) towards described second input contact chip (3) end face be provided with bubble point or silver contact.
7. DC speed regulation reversing switch according to claim 5, it is characterized in that: described brake block (72) comprises U-bend flap (721), and the first contact portion (723) be separately positioned on two side plate (722) free ends of described U-bend flap (721) and the second contact portion (724);
Shown in two side plate (722) gaps of U-bend flap (721) be arranged in the installing space that formed by described crushing block (73) and described mounting groove (71) inwall; And described first contact portion (723) and having between described second contact portion (724) and described mounting groove (71) along the axial mobile space of described movable stand (7).
8. DC speed regulation reversing switch according to claim 1, is characterized in that: also comprise commutating structure:
Shaft hole (10), is arranged on described housing (1);
First sliding contact surface (21), is arranged on the first input contact chip (2);
Second sliding contact surface (31), is arranged on the second input contact chip (3);
First exports contact chip (4), be fixedly mounted on described housing (1), there is the first output (40) stretching out in described housing (1), and be bent to form two the 3rd sliding contact surfaces (41);
Second exports contact chip (5), is fixedly mounted on described housing (1), has the second output (50) stretching out in described housing (1), and the 4th sliding contact surface (51) be bent to form;
Fork (6), have and can insert in described shaft hole (10) and the rotating shaft (61) that is installed in rotation on described housing (1), and to be commutated slide block (64) by the first commutation slide block (63) and second that the first elastic component (62) is arranged on described fork (6);
When described fork (6) turns to primary importance, under the elastic force effect of described first elastic component (62), described first commutation slide block (63) is resisted against on described first sliding contact surface (21) and described 3rd sliding contact surface (41) simultaneously, and described second commutation slide block (64) is resisted against on described second sliding contact surface (31) and the 4th sliding contact surface (51) simultaneously;
When described fork (6) turns to the second place, under the elastic force effect of described first elastic component (62), described first commutation slide block (63) is resisted against on described first sliding contact surface (21) and described 4th sliding contact surface (51) simultaneously, and described second commutation slide block (64) is resisted against on described second sliding contact surface (31) and the 3rd sliding contact surface (41) described in another simultaneously.
9. DC speed regulation reversing switch according to claim 8, it is characterized in that: at the marginal position of described 3rd sliding contact surface (41) and/or described 4th sliding contact surface (51), be also provided with arc-shaped transition curved surface (42).
10. DC speed regulation reversing switch according to claim 8, is characterized in that:
The accommodation space of accommodating installation plastic package diode (9) is formed between described first input contact chip (2) and described second input contact chip (3), described first input contact chip (2) is provided with the first installation portion (22) being suitable for the one end of detachably installing plastic package diode (9), and described second input contact chip (3) is provided with the second installation portion (32) being suitable for detachably installing the other end of described plastic package diode (9).
11. DC speed regulation reversing switches according to claim 10, it is characterized in that: also comprise support bar (90), it is inner and first input the insertion section (92) that contact chip (2) is fixedly connected with that described support bar (90) has insertion first installation portion (22), and the supporting surface (93) for being welded to connect with the bottom surface of metallic packaging diode (91), the second input contact chip (3) has the joint face be welded to connect with the end face of metallic packaging diode (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520762227.XU CN205004201U (en) | 2015-09-29 | 2015-09-29 | Dc speed regulation commutator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520762227.XU CN205004201U (en) | 2015-09-29 | 2015-09-29 | Dc speed regulation commutator |
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| Publication Number | Publication Date |
|---|---|
| CN205004201U true CN205004201U (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520762227.XU Active CN205004201U (en) | 2015-09-29 | 2015-09-29 | Dc speed regulation commutator |
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| CN (1) | CN205004201U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742084A (en) * | 2016-04-07 | 2016-07-06 | 苏州华之杰电讯有限公司 | Contact mechanism of switch |
| CN110265248A (en) * | 2019-07-18 | 2019-09-20 | 科都电气有限公司 | The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch |
| CN115985704A (en) * | 2023-03-16 | 2023-04-18 | 常州云杰电器有限公司 | Small-size direct current speed governing switch |
-
2015
- 2015-09-29 CN CN201520762227.XU patent/CN205004201U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742084A (en) * | 2016-04-07 | 2016-07-06 | 苏州华之杰电讯有限公司 | Contact mechanism of switch |
| CN105742084B (en) * | 2016-04-07 | 2018-09-28 | 苏州华之杰电讯股份有限公司 | A kind of contact mechanism of switch |
| CN110265248A (en) * | 2019-07-18 | 2019-09-20 | 科都电气有限公司 | The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch |
| CN115985704A (en) * | 2023-03-16 | 2023-04-18 | 常州云杰电器有限公司 | Small-size direct current speed governing switch |
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