CN211294907U - Positive and negative change-over switch for DC motor - Google Patents
Positive and negative change-over switch for DC motor Download PDFInfo
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- CN211294907U CN211294907U CN201922472228.1U CN201922472228U CN211294907U CN 211294907 U CN211294907 U CN 211294907U CN 201922472228 U CN201922472228 U CN 201922472228U CN 211294907 U CN211294907 U CN 211294907U
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Abstract
The utility model discloses a direct current motor positive and negative change over switch, it includes PCB board, three micro-gap switch, switch support, switch pivot and the fender position switching structure that is used for the wiring, three micro-gap switch is the article font and welds on the PCB board, rotatable installation PCB board in the bottom of switch pivot, switch support buckle closure switch pivot and fix on the PCB board, the upper end of switch pivot passes the switch support to can rotate relative to the switch support, fender position switching structure installs in the switch groove of switch support, and withstands the switch pivot; one of the three micro switches is a power switch, and the other two micro switches are positive and negative change-over switches. The utility model adopts the micro switch to replace a double-pole double-throw switch, saves cost, and simultaneously does not need an external circuit to drive the micro switch to be switched on and off; the connecting wires between the switches are connected through the copper foil of the PCB, so that no jumper wire is needed, wrong wires are not easy to insert, and labor cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of the positive and negative switch of motor and specifically relates to a positive and negative change over switch of DC motor.
Background
At present, the rotation direction switching of the direct current motor mainly has two modes:
firstly, a double-pole double-throw switch is used for switching the input positive pole and the input negative pole of the direct current motor to realize the rotation direction conversion. Although the method is simple, the input and output electrical connection points of the double-pole double-throw switch are many, many external jumper wires are needed, the installation and operation of workers are inconvenient, and the device can be burnt by short circuit caused by the wrong jumper wires if the workers do not pay attention to the short circuit.
Two, relay control mode utilizes two relay disconnection of control circuit control or closed order to switch over the motor to revolve to, but the condition that can have two relays to close simultaneously or break off simultaneously all the time when two relay conversion, and two inputs of motor just so have the problem of short circuit, burn components and parts, need additionally increase a relay for avoiding this problem, and the effect cuts off input power when positive and negative switching. If relays are used to perform this function, at least three relays are required, and peripheral components are required to drive the relays, which is costly.
Therefore, improvements to the prior art are yet to be made.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a positive and negative change over switch of DC motor, it is many that the positive and negative change over switch wire jumper that aims at solving current DC motor, jump the wrong line easily and lead to the short circuit to and use the relay as control mode to have short circuit and technical problem with high costs.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: a direct current motor positive and negative change-over switch comprises a PCB (printed circuit board) for wiring, three micro switches, a switch bracket, a switch rotating shaft and a gear change-over structure, wherein the three micro switches are welded on the PCB in a delta shape, the bottom end of the switch rotating shaft is rotatably installed on the PCB, the switch bracket covers the switch rotating shaft and is fixed on the PCB, the upper end of the switch rotating shaft penetrates through the switch bracket and can rotate relative to the switch bracket, and the gear change-over structure is installed in a change-over groove of the switch bracket and props against the switch rotating shaft; one of the three micro switches is a power switch, and the other two micro switches are positive and negative change-over switches.
The direct current motor positive and negative change-over switch is characterized in that the lower end and the upper end of the switch rotating shaft are respectively provided with a change-over contact part and a change-over control part.
The positive and negative change over switch of DC motor, wherein, it is provided with first arc contact site, second arc contact site and third arc contact site to switch the contact site, the both sides of first arc contact site are second arc contact site, third arc contact site sets up between second arc contact site with first arc contact site relatively, a closed ring is constituteed in first arc contact site, second arc contact site and third arc contact site end to end connection.
The direct current motor positive and negative change-over switch is characterized in that the change-over control part is provided with three arc-shaped grooves which respectively correspond to the gear rotation of the gear change-over structure.
The positive and negative change over switch of DC motor, wherein, keep off the position switching structure and switch steel ball, keep off position spring and spring gland including keeping off the position, the one end that keeps off the position spring will keep off the position and switch the steel ball and withstand to install in switching the inslot, the other end that keeps off the position spring withstands switch support, spring gland will keep off the position spring and compress tightly the encapsulation in switching the inslot.
The direct current motor positive and negative switch, wherein, keep off a position and switch a position that the steel ball rotates an arc wall, switch pivot then corresponds and switches a fender position.
The direct current motor positive and negative change-over switch is characterized in that a quick-connection input port and a quick-connection output port are welded on the PCB; the quick-connection input port is connected with external alternating current.
The direct current motor positive and negative change-over switch, wherein, connect the input port soon and be connected with switch and rectifier bridge, the rectifier bridge is connected with positive and negative change-over switch, positive and negative change-over switch is connected with direct current motor.
Has the advantages that: the utility model discloses combine the control mode of relay, use two micro-gap switches as the direction of rotation change over switch, use a micro-gap switch as switch, the same function only needs three micro-gap switch to realize the function, has saved a lot of costs compared with three relay, utilizes micro-gap switch to do not need external circuit to drive micro-gap switch break-make simultaneously, has practiced thrift the cost again; the microswitch is directly arranged on the PCB, connecting wires between the switches are connected through the PCB copper foil, and meanwhile input and output control of the switches is connected with other components through the PCB copper foil, so that the problems that the traditional mechanical switch is connected with multiple external connecting jumpers, the wrong plug wires are easy to occur and the labor cost is high are solved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of the switch rotating shaft of the present invention.
Fig. 3 is a top view of the switch shaft of the present invention.
Fig. 4 is a stop state diagram of the present invention.
Fig. 5 is a circuit diagram of the stop of the present invention.
Fig. 6 is a forward rotation switching state diagram in the forward gear of the present invention.
Fig. 7 is a circuit diagram of forward rotation switching in forward gear of the present invention.
Fig. 8 is a diagram of the forward rotation operation state of the present invention.
Fig. 9 is a circuit diagram of the forward rotation operation of the present invention.
Fig. 10 is a reverse shift state diagram in the reverse gear of the present invention.
Fig. 11 is a reverse shift switching circuit diagram in the reverse gear of the present invention.
Fig. 12 is a diagram of the reverse operation state of the present invention.
Fig. 13 is a reverse operation circuit diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples.
As shown in fig. 1-3, the utility model discloses a direct current motor positive and negative change-over switch, it includes PCB board 1, three micro-gap switch 2, switch bracket 3, switch pivot 4 and gear position switching structure 5 that are used for the wiring, three micro-gap switch 2 is the welding of article font on PCB board 1, the rotatable installation PCB board 1 in bottom of switch pivot 4, switch bracket 3 covers switch pivot 4 and fixes on PCB board 1, the upper end of switch pivot 4 passes switch bracket 3, and can rotate relative to switch bracket 3, gear position switching structure 5 installs in the switch groove 30 of switch bracket 3, and withstands switch pivot 4; one of the three micro switches 2 is a power switch 20, and the other two micro switches are positive and negative change-over switches 21.
The direct current motor positive and negative change-over switch is characterized in that the lower end and the upper end of the switch rotating shaft 4 are respectively provided with a change-over contact part 40 and a change-over control part 41.
Direct current motor positive and negative change over switch, wherein, switch contact site 40 and be provided with first arc contact site 6, second arc contact site 7 and third arc contact site 8, the both sides of first arc contact site 6 are second arc contact site 7, third arc contact site 8 sets up between second arc contact site 7 with first arc contact site 6 relatively, a closed ring is constituteed in first arc contact site 6, second arc contact site 7 and the 8 end to end connections of third arc contact site.
The direct current motor positive and negative change-over switch is characterized in that the change-over control part 41 is provided with three arc-shaped grooves 9 which respectively correspond to the gear rotation of the gear change-over structure 5.
The positive and negative change over switch of dc motor, wherein, keep off position switching structure 5 and switch steel ball 50, fender position spring 51 and spring gland 52 including keeping off the position, the one end that keeps off position spring 51 will keep off position switching steel ball 50 and withhold and install in switching groove 30, the other end that keeps off position spring 51 withholds switch bracket 3, spring gland 52 will keep off position spring 51 and compress tightly the encapsulation in switching groove 30.
The direct current motor positive and negative switch, wherein, every time the gear switching steel ball 50 rotates an arc-shaped groove 9, the switch rotating shaft 4 correspondingly switches a gear.
In the direct current motor positive and negative change-over switch, a quick-connection input port 10 and a quick-connection output port 11 are welded on the PCB 1; the quick-connection input port 10 is connected with external alternating current.
The direct current motor positive and negative change-over switch is characterized in that the quick-connection input port 10 is connected with the power switch 20 and the rectifier bridge 12, the rectifier bridge 12 is connected with the positive and negative change-over switch, and the positive and negative change-over switch is connected with the direct current motor 13.
The working principle is as follows:
First, stop block
The switch stops are shown in FIGS. 4 and 5 below, with the center switch shaft shown intact with either of the three microswitches S1S 2S 3, in which position the microswitch S1 has its 12 foot open and 13 foot closed. Microswitch S2 has pin 12 open and pin 13 closed. Microswitch S3 has pin 12 open and pin 13 closed.
From a principle diagram, in the state, because the pin 13 of the S1 is closed and the pin 13 of the S2 is closed, the positive and negative outputs of the rectifier bridge are short-circuited, in order to solve the short-circuit problem, a power switch S3 is additionally arranged in the design, and although the output end of the rectifier bridge is short-circuited in the stop gear, the tidying bridge with the pin 12 of the S3 being open has no input, and even if the output is short-circuited, the risk does not exist.
Second, positive rotation stop
There are two processes from the stop to the forward, S1 switches states first and then S3 turns on the power.
1. Forward rotation switching:
when the switch rotating shaft rotates clockwise from the stop position to the position shown in fig. 6, the micro switch S1 is triggered by the switch rotating shaft in the process of converting the original 13-pin closed 12-pin open state into the 13-pin open 12-pin closed state. S2 remains unchanged, i.e., 13-pin closed 12 open.
As shown in fig. 7, at this time, the positive output end of the rectifier bridge is connected to the positive electrode of the dc motor through the 12 pins of S1, and the negative output end of the rectifier bridge is connected to the negative electrode of the dc motor through the 13 pins of S2.
Since the 12-pin of S3 is open, no input motor of the finishing bridge is not operating in this state.
2. Corotation work:
as shown in fig. 8 and 9, when the switch rotating shaft is rotated clockwise to the position shown in fig. 8, the switch rotating shaft triggers the micro switch S3, so that the pin 13 of the switch S3 is opened, the pin 12 is closed, the rectifier bridge has an input, and the motor starts to work.
3. Stopping forward rotation:
as shown in fig. 4 and 5, the switch rotating shaft is rotated counterclockwise from the forward rotation position to the position shown in fig. 4, the 12-pin switch of the S3 is off, the 13-pin switch is on, the rectifier bridge has no input, and the motor does not work; s1 is converted from the original 13-pin open 12-pin close to the 13-pin closed 12-pin open, i.e., the state of fig. 4.
Third, reverse gear
Similarly, there are two processes from the stop to the reverse, S2 first switches the state and then S3 turns on the power.
1. Reverse switching:
as shown in fig. 10 and 11, when the switch shaft rotates counterclockwise from the stop position to the position of fig. 10, the switch shaft activates the micro switch S2 to switch from the original 13-pin closed 12-pin open to the 13-pin open 12-pin closed state. S1 remains unchanged, i.e., 13-pin closed 12 open.
At this time, the positive output end of the sorting bridge is connected with the negative electrode of the direct current motor through the 12 pin of S2, and the negative output end of the rectifier bridge is connected with the positive electrode of the direct current motor through the 13 pin of S1.
Also, since the 12-pin of S3 is open, no input motor of the finishing bridge is not operating in this state.
2. And (3) reversing operation:
as shown in fig. 12 and 13, when the switch rotating shaft is rotated counterclockwise to the position shown in fig. 12, the switch rotating shaft activates the micro switch S3, so that the pin 13 of the switch S3 is opened, the pin 12 is closed, the rectifier bridge has an input, and the motor starts to work.
3. And (3) stopping reverse rotation:
as shown in fig. 4 and 5, the switch rotating shaft is rotated counterclockwise from the forward rotation position to the position shown in fig. 4, the 12-pin switch of the S3 is off, the 13-pin switch is on, the rectifier bridge has no input, and the motor does not work; s2 is converted from the original 13-pin open 12-pin close to the 13-pin closed 12-pin open, i.e., the state of fig. 4.
The utility model discloses combine the control mode of relay, use two micro-gap switches as the direction of rotation change over switch, use a micro-gap switch as switch, the same function only needs three micro-gap switch to realize the function, has saved a lot of costs compared with three relay, utilizes micro-gap switch to do not need external circuit to drive micro-gap switch break-make simultaneously, has practiced thrift the cost again; the microswitch is directly arranged on the PCB, connecting wires between the switches are connected through the PCB copper foil, and meanwhile input and output control of the switches is connected with other components through the PCB copper foil, so that the problems that the traditional mechanical switch is connected with multiple external connecting jumpers, the wrong plug wires are easy to occur and the labor cost is high are solved.
The above is a preferred embodiment of the present invention, and certainly not to limit the scope of the present invention, it should be noted that, for those skilled in the art, modifications or equivalent substitutions of the technical solutions of the present invention without creative efforts may not depart from the protection scope of the technical solutions of the present invention.
Claims (8)
1. A direct current motor positive and negative change-over switch is characterized by comprising a PCB (printed circuit board) for wiring, three micro switches, a switch bracket, a switch rotating shaft and a gear change-over structure, wherein the three micro switches are welded on the PCB in a delta shape, the bottom end of the switch rotating shaft is rotatably arranged on the PCB, the switch bracket covers the switch rotating shaft and is fixed on the PCB, the upper end of the switch rotating shaft penetrates through the switch bracket and can rotate relative to the switch bracket, and the gear change-over structure is arranged in a change-over groove of the switch bracket and props against the switch rotating shaft; one of the three micro switches is a power switch, and the other two micro switches are positive and negative change-over switches.
2. The direct current motor forward-reverse switching switch according to claim 1, wherein a lower end and an upper end of the switch rotating shaft are provided with a switching contact portion and a switching control portion, respectively.
3. The direct current motor positive and negative changeover switch according to claim 2, wherein the changeover contact portion is provided with a first arc-shaped contact portion, a second arc-shaped contact portion and a third arc-shaped contact portion, the second arc-shaped contact portion is arranged on two sides of the first arc-shaped contact portion, the third arc-shaped contact portion is arranged between the second arc-shaped contact portions and the first arc-shaped contact portion, the second arc-shaped contact portion and the third arc-shaped contact portion are connected end to form a closed ring.
4. The direct current motor forward/reverse switching switch according to claim 2, wherein the switching control portion is provided with three arc-shaped grooves respectively corresponding to the gear rotation of the gear switching structure.
5. The direct current motor positive-negative change-over switch according to claim 4, wherein the gear shift structure comprises a gear shift steel ball, a gear spring and a spring gland, one end of the gear spring abuts against the gear shift steel ball and is installed in the switch groove, the other end of the gear spring abuts against the switch bracket, and the spring gland tightly seals the gear spring in the switch groove.
6. The direct current motor positive and negative change-over switch according to claim 5, wherein the switch rotating shaft correspondingly changes over one gear every time the gear change-over steel ball rotates over one arc-shaped groove.
7. The direct current motor positive and negative change-over switch according to claim 1, wherein a quick-connection input port and a quick-connection output port are further welded on the PCB; the quick-connection input port is connected with external alternating current.
8. The direct current motor positive-negative change-over switch according to claim 7, wherein the quick-connection input port is connected with a power switch and a rectifier bridge, the rectifier bridge is connected with a positive-negative change-over switch, and the positive-negative change-over switch is connected with the direct current motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922472228.1U CN211294907U (en) | 2019-12-31 | 2019-12-31 | Positive and negative change-over switch for DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922472228.1U CN211294907U (en) | 2019-12-31 | 2019-12-31 | Positive and negative change-over switch for DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211294907U true CN211294907U (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922472228.1U Active CN211294907U (en) | 2019-12-31 | 2019-12-31 | Positive and negative change-over switch for DC motor |
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| CN (1) | CN211294907U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022206042A1 (en) * | 2021-03-30 | 2022-10-06 | 何剑波 | Forward and reverse rotation control switch of direct current motor, and juicer comprising control switch |
-
2019
- 2019-12-31 CN CN201922472228.1U patent/CN211294907U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022206042A1 (en) * | 2021-03-30 | 2022-10-06 | 何剑波 | Forward and reverse rotation control switch of direct current motor, and juicer comprising control switch |
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