CN113096987B

CN113096987B - Forward and reverse rotation motor change-over switch

Info

Publication number: CN113096987B
Application number: CN202110472884.0A
Authority: CN
Inventors: 孙杰
Original assignee: Jiangsu Youpin Electric Co ltd
Current assignee: Jiangsu Youpin Electric Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-10-21
Anticipated expiration: 2041-04-29
Also published as: CN113096987A

Abstract

The invention discloses a positive and negative rotation motor change-over switch in the field of positive and negative rotation motors, which comprises a wiring part, wherein the wiring part comprises three first wiring sheets, the first wiring sheets are used for communicating a live wire of a three-phase power supply and the positive and negative rotation motors, the first wiring sheets comprise static contacts, first movable contacts, second movable contacts, wire inlet ends, first wire outlet ends and second wire outlet ends, the static contacts are connected with the wire inlet ends, one ends of the first movable contacts are connected with the first wire outlet ends, the other ends of the first movable contacts are used for being connected with the static contacts, one ends of the second movable contacts are connected with the second wire outlet ends, and the other ends of the second movable contacts are used for being connected with the static contacts. The invention replaces the mode of realizing the switching of the forward and reverse rotating motors by the original two control switches and one contactor in the prior art, reduces the manufacturing, using and maintaining costs of electric devices, realizes the intensification of the forward and reverse rotating motor switching circuit switch, and simultaneously effectively solves the problem that the contact coil is continuously electrified and heated to generate energy consumption when the contactor acts.

Description

Forward and reverse rotation motor change-over switch

Technical Field

The invention relates to the technical field of forward and reverse rotating motors, in particular to a forward and reverse rotating motor change-over switch.

Background

The motor rotates in a forward and reverse direction, which represents that the motor rotates clockwise and anticlockwise. The clockwise rotation of the motor is the forward rotation of the motor, and the anticlockwise rotation of the motor is the reverse rotation of the motor. The forward and reverse rotation of motors is widely used, for example, in traveling cranes, electric planing machines for woodworking, bench drills, filament cutters, spin dryers, lathes, and the like.

In the existing forward and reverse rotation reversing motor, a control circuit of the existing forward and reverse rotation reversing motor usually needs to change the phase sequence of a three-phase power supply of the motor through two contactors or two control and protection switches, so that the forward and reverse rotation of the motor can be reversed.

However, the control circuit of the forward and reverse rotating motor at present has the following problems: the electrical appliance has more elements and occupies large space, so that the electrical cabinet has larger volume; the primary wire and the secondary wire have more contacts, so that the wiring cost is high; the two switches are in linkage fit, so that the requirement on consistency is high; meanwhile, the number of electric devices and wiring points is large, so that the number of easily generated fault points is large, and the problem troubleshooting difficulty is large; when the contactor acts, the contact coil is continuously electrified to generate magnetic force, so that the problems of energy consumption and heating caused by the counterforce of the spring are solved.

Disclosure of Invention

The application is through providing a just reversal motor change over switch for solve or the problem that just reversal motor control circuit exists among the prior art is solved to the part.

The embodiment of the application provides a positive and negative motor change over switch that changes, including wiring portion, wiring portion includes three lugs one, lug one is used for communicateing three phase power's live wire and positive and negative motor that changes, lug one includes static contact, movable contact one, movable contact two, inlet wire end, leading-out terminal one and leading-out terminal two, the static contact with the inlet wire end is connected, movable contact one end with leading-out terminal one is connected, the other end be used for with the static contact is connected, two one ends of movable contact with leading-out terminal two is connected, the other end be used for with the static contact is connected.

The beneficial effects of the above embodiment are as follows: the wire inlet end, the static contact, the movable contact I and the wire outlet end of the three first wiring lugs commonly form a main loop, the wire inlet end, the static contact, the movable contact II and the wire outlet end commonly form another main loop, and the two main loops of the other main loop are respectively used for connecting the U/V/W and the W/V/U of a forward and reverse rotating motor load, wherein when one main loop connected with the motor load U/V/W is conducted and the other main loop is disconnected, the motor runs in the forward direction, and when one main loop connected with the motor load W/V/U is conducted and the other main loop is disconnected, the motor runs in the reverse direction; compared with the mode that the forward and reverse motor switching is realized by the original two control switches or contactors in the prior art, the forward and reverse motor switching switch replaces the original two electrical functional parts by one electrical part, the occupied space of electrical parts is reduced on the basis of ensuring the original forward and reverse switching function, meanwhile, connecting wires between the electrical parts are simplified, the fault occurrence probability and the overhauling difficulty are reduced, and meanwhile, the manufacturing and using cost of the forward and reverse motor switching switch is greatly reduced.

On the basis of the above embodiments, the present application can be further improved, specifically as follows:

in one embodiment of the present application, the first terminal strip further includes a housing, the fixed contact, the incoming line end, the first outgoing line end and the second outgoing line end are fixedly connected to the housing, one end of the first moving contact connected to the first outgoing line end is coupled to the housing, the other end of the first moving contact may abut against the fixed contact, one end of the second moving contact connected to the second outgoing line end is coupled to the housing, and the other end of the second moving contact may abut against the fixed contact. The moving contact I and the moving contact II can be switched in a state of being connected with the fixed contact or being vacant through the rotation of the corresponding shafts respectively.

In one embodiment of the present application, contacts are respectively disposed at two ends of the fixed contact, the first moving contact and the second moving contact are oppositely disposed at two ends of the fixed contact, and an arc extinguishing member is disposed between the first moving contact, the second moving contact and the fixed contact. The arc extinguishing piece is used for guiding and discharging contact electric arc, and the moving contact I and the moving contact II are arranged oppositely, so that the overall size of the lug plate is reduced due to reasonable layout.

In one embodiment of the present application, the switch for switching a forward and reverse rotation motor further includes a control portion and a transmission mechanism, three connection pieces in the connection portion are arranged in parallel and fixedly connected to the control portion, the transmission mechanism is used for connecting the driving mechanism in the control portion with the first moving contact and the second moving contact in the connection portion, and the driving mechanism in the control portion drives the first moving contact and the second moving contact to rotate synchronously through the transmission mechanism. The first moving contact and the second moving contact synchronously rotate so as to ensure that one loop is connected and the other loop is disconnected.

In one embodiment of the present application, the transmission mechanism includes a plurality of first shift levers and second shift levers, a first connection shaft, and a second connection shaft, the plurality of first shift levers and second shift levers correspond to the first connection terminals one by one and are disposed in the housing, the middle portions of the first shift levers and the second shift levers are respectively coupled to the housing, one end of each shift lever is hinged to the first moving contact and is used for driving the first moving contact to rotate, one end of each shift lever is hinged to the second moving contact and is used for driving the second moving contact to rotate, one end of each connection shaft traverses the connection portion and is inserted into the middle portion of the coupling between the first shift lever and the housing and is used for driving the first shift lever to rotate, the other end of each connection shaft is connected to the driving mechanism in the control portion, and the driving mechanism in the control portion is used for driving the first shift levers and the second connection shafts to rotate relatively to drive the first moving contacts and the second moving contacts to rotate synchronously. The same driving mechanism drives the first moving contact and the second moving contact to synchronously act, so that linkage cooperation of multiple switches is omitted, and switching consistency of two loops is guaranteed.

In one embodiment of the present application, the first shift lever and the second shift lever have two-color codes at ends thereof, and the housing has a through hole at a position corresponding to the two-color codes. The color code colors of the first shifting lever and the second shifting lever can be directly observed through the through holes, and the rotating positions of the first shifting lever and the second shifting lever are judged through different colors, so that the current wiring mode of the wiring part, namely the working state of the motor, is conveniently judged.

In one embodiment of this application, the wiring portion further includes a second terminal lug, the second terminal lug is used for communicating the neutral line of the three-phase power supply and the positive and negative rotating motor, and the second terminal lug are the same in structure. The second lug has the same structure as the lug, so that the manufacturing and die sinking cost of parts is reduced.

In one embodiment of the application, the driving mechanism comprises a supporting plate, a triggering assembly, a switching assembly, a first shifting piece and a second shifting piece, the triggering assembly comprises an electromagnet, a mandril, a shifting block, a pin shaft and a connecting rod, and the switching assembly comprises a rotary plate, a blocking piece, a fixed seat, a connecting piece and a spring piece; the supporting plate is provided with a V-shaped guide groove, the electromagnet is arranged in the guide sleeve, one end of the ejector rod is arranged in the guide sleeve, a pressure spring is arranged between the ejector rod and the electromagnet, the other end of the ejector rod is hinged with one end of the shifting block, the middle part of the shifting block is connected to the supporting plate in a shaft mode, the other end of the shifting block is connected with the pin shaft, one end of the connecting rod is hinged with the pin shaft, the other end of the connecting rod is provided with a guide post, and the guide post is located in the V-shaped guide groove; the turntable and the separation blade are coaxially coupled to the supporting plate, a limiting groove is formed in the upper portion of the turntable, a notch is formed in the lower portion of the turntable, the guide post is located in the notch, a limiting post is arranged at the upper end of the separation blade and located in the limiting groove, the forward projection portion of the bottom of the lower end of the separation blade shields the forward projection of the V-shaped guide groove, a gap exists between the forward projection portion and the inner wall of the V-shaped guide groove, the fixing seat is fixed to the supporting plate, one end of the elastic piece is fixed to the supporting plate, the other end of the elastic piece is connected with the fixing seat through a spring, one end of the connecting piece is hinged to the turntable, the other end of the connecting piece is hinged to the elastic piece, one end of the first shifting piece and one end of the second shifting piece are respectively and coaxially coupled to the supporting plate, shaft holes corresponding to the first connecting shaft and the second connecting shaft are respectively formed in the first shifting piece and the second shifting piece, waist holes are respectively formed in the other ends of the first shifting piece and the second shifting piece, and the guide post is located in the waist holes of the first shifting piece and the second shifting piece. The driving mechanism has two states of normal driving and trigger driving, wherein in the normal state: the electromagnet is not electrified, the push rod enables one end, provided with the pin shaft, of the shifting block to keep an upward posture under the action of the pressure spring, so that the guide post is located at the top of one end of the V-shaped guide groove, the bottom of the lower end of the blocking piece is located at one end, where the guide post is located, of the V-shaped guide groove, meanwhile, the first shifting piece and the second shifting piece are kept immovable, and the first connecting shaft and the second connecting shaft which are connected with the first shifting piece and the second shifting piece are kept immovable; when the driving is triggered: the electromagnet is powered on temporarily, the elastic force of a pressure spring is overcome to cause the ejector rod to contract, so that the shifting block rotates, one end of the shifting block, which is provided with a pin shaft, moves downwards, the guide post moves downwards along the V-shaped guide groove and abuts against the bottom of the lower end of the separation blade in the moving process to force the separation blade and the rotary disc to rotate at a small angle, the guide post is separated from the bottom of the lower end of the separation blade and then is positioned at the bottom of the V-shaped guide groove, the rotary disc drives the separation blade to return to the original position under the action of the spring and the elastic sheet, the separation blade continuously and partially shields the V-shaped guide groove at the end, one of the first shifting sheet and the second shifting sheet is kept still during the downward movement of the guide post, the other shifting sheet rotates correspondingly, then the electromagnet is powered off, the ejector rod extends under the action of the pressure spring to cause the reverse rotation of the shifting block, so that one end of the shifting block, which is provided with the pin shaft, the guide post moves upwards along the V-shaped guide groove, at the moment, the blocking piece partially blocks one end of the V-shaped guide groove, so that in the moving process, the guide post abuts against the bottom of the lower end of the blocking piece and moves to the other end of the V-shaped guide groove and is positioned at the top of the other end of the V-shaped guide groove; therefore, the driving mechanism triggers the driving process once, the first shifting piece and the second shifting piece rotate in the same direction for a set angle, the driving requirements of the first connecting shaft and the second connecting shaft are met, the first connecting shaft and the second connecting shaft rotate for a specific angle and are kept, the electromagnet needs to be powered only in the triggering driving process, the electromagnet does not need to be powered in a conventional state, and the problem that when an original contactor acts, the contact coil continuously powers on electricity and generates heat to consume energy is solved.

In one embodiment of the present application, the supporting plate is provided with a limiting hole, and the limiting column is located in the limiting hole. Prevent that carousel and separation blade from excessively rotating to the position of accurate location separation blade bottom in V type guide way.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

1. compared with the mode that the forward and reverse rotating motor is switched by the original two control switches or contactors in the prior art, the forward and reverse rotating motor switching switch replaces the original two electric devices by one electric device, so that the occupied space of the electric devices is greatly reduced, the layout and the structure of an electric device box are intensified, and the manufacturing and using cost is greatly reduced;

2. the structure that the contact is locked and closed is adopted, so that the working mode that the existing switch contact is continuously attracted by the power on of the electromagnetic coil is cancelled, and the problem that the energy consumption is generated due to the continuous power on and heating of the contact coil when the original contactor acts is solved;

3. through the structure of intensification, simplified the connecting wire between the electrical part by a wide margin, made the cost and the fault incidence of switching circuit to and overhaul the degree of difficulty and can effectively reduce, thereby reduced the maintenance cost by a wide margin.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic view of another embodiment of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a first schematic view of an internal structure of a wire connecting piece;

FIG. 5 is a second schematic view of the internal structure of the first terminal;

FIG. 6 is a perspective view of the driving mechanism;

FIG. 7 is a first schematic front view of the driving mechanism;

FIG. 8 is a second schematic front view of the driving mechanism;

FIG. 9 is a first schematic rear view of the driving mechanism;

FIG. 10 is a second schematic rear view of the driving mechanism;

fig. 11 is an exploded view of the trigger assembly.

The automatic switching device comprises a first 100 wiring piece, a second 101 casing, a first 102 fixed contact, a first 103 movable contact, a second 104 movable contact, a wire inlet end of 105, a first 106 wire outlet end, a second 107 wire outlet end, an arc extinguishing member, a through hole of 109, a second 200 wiring piece, a second 2 control part, a first 31 driving lever, a second 32 driving lever, a first 33 connecting shaft, a second 34 connecting shaft, a second 4 supporting plate, a 41.V-shaped guide groove, a 42 limiting hole, a 5 triggering assembly, a 51 electromagnet, a 52 ejector rod, a 53 shifting block, a 54 pin shaft, a 55 connecting rod, a 551 guiding column, a 56 guiding sleeve, a 57 pressure spring, a 6 switching assembly, a 61 rotating disc, a 611 limiting groove, a 62 blocking piece, a 621 limiting column, a 63 fixing seat, a 64 connecting piece, a 65 elastic sheet, a 66 spring, a 7 shifting piece, a first 71 shaft hole, a 72 waist hole and a second 8 shifting piece.

Detailed Description

The present invention is further illustrated by the following detailed description, which is to be construed as merely illustrative and not limitative of the remainder of the disclosure, and modifications and variations such as those ordinarily skilled in the art are intended to be included within the scope of the present invention as defined in the appended claims.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "vertical", "peripheral surface" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships where the products of the present invention are used as they are, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "vertical" or the like does not imply that the components are required to be absolutely horizontal or overhanging, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In describing the invention, it is not necessary for a schematic representation of the above terminology to be directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples of the invention and features of different embodiments or examples described herein may be combined and combined by those skilled in the art without contradiction.

Example (b):

as shown in fig. 1-5, a switch for switching a forward and reverse rotating motor comprises a wiring part, a control part 2 and a transmission mechanism;

the wiring part is fixedly connected with the control part 2, the wiring part is used for communicating a three-phase power supply and a motor rotating in forward and reverse directions, the wiring part comprises a first wiring sheet 100 and a second wiring sheet 200 which are arranged side by side, the first wiring sheet 100 comprises a shell 101, a fixed contact 102, a first moving contact 103, a second moving contact 104, a wire inlet end 105, a first wire outlet end 106 and a second wire outlet end 107, the fixed contact 102 is fixedly connected with the wire inlet end 105, one end of the first moving contact 103 is flexibly connected with the first wire outlet end 106 through a conducting wire (not shown in the figure), the other end of the first moving contact is flexibly connected with the second wire outlet end 107 through a conducting wire (not shown in the figure), the other end of the second moving contact 104 is connected with the fixed contact 102, the wire inlet end 105, the first wire outlet end 106 and the second wire outlet end 107 are fixedly connected with the shell 101, one end of the first moving contact 103, the second wire outlet end 106 and the shell 101, one end of the moving contact 104 is connected with the second wire outlet end 107 and the shell 101, two ends of the moving contact 102 and the fixed contact 108, the second wire outlet end 107 and the arc extinguishing end 108 are arranged between the fixed contact 102 and the arc extinguishing end 102; the second wiring lug 200 is used for communicating a neutral line of a three-phase power supply and a positive and negative rotating motor, and the second wiring lug 200 and the first wiring lug 100 are identical in structure;

the transmission mechanism comprises a plurality of first shift levers 31, second shift levers 32, a first connecting shaft 33 and a second connecting shaft 34, the first shift levers 31, the second shift levers 32, the first connection terminals 100 and the second connection terminals 200 correspond to each other one by one and are respectively arranged in the shell 101, the middle parts of the first shift levers 31 and the second shift levers 32 are respectively connected with the shell 101 in a shaft mode, one end of each first shift lever 31 is hinged with the first movable contact 103 and is used for driving the first movable contact 103 to rotate, one end of each second shift lever 32 is hinged with the second movable contact 104 and is used for driving the second movable contact 104 to rotate, one end of each first connecting shaft 33 penetrates through the corresponding connection part and is inserted in the middle of the axial connection position of the first shift lever 31 and the shell 101 and is used for driving the first shift lever 31 to rotate, the other end of each first connecting shaft 33 is connected with the driving mechanism in the control part 2, one end of each second connecting shaft 34 penetrates through the corresponding connecting shaft 33 and the corresponding connecting shaft 34 and is used for driving the second movable contact 103 and the second movable contact 104 to rotate synchronously.

In addition, the other end parts of the first shifting lever 31 and the second shifting lever 32 are respectively provided with a bicolor color code, the shell is provided with a through hole 109 at the position corresponding to the bicolor color code, the color code colors of the end parts of the first shifting lever 31 and the second shifting lever 32 can be directly observed through the through hole 109, and the rotating positions of the first shifting lever 31 and the second shifting lever 32 are judged through different colors, so that the current wiring mode of a wiring part and the working state of a motor are conveniently judged.

As shown in fig. 6-11, the driving mechanism includes a supporting plate 4, a triggering assembly 5, a switching assembly 6, a first shifting piece 7 and a second shifting piece 8, the triggering assembly 5 includes an electromagnet 51, a push rod 52, a shifting block 53, a pin 54 and a connecting rod 55, the switching assembly 6 includes a turntable 61, a blocking piece 62, a fixed seat 63, a connecting piece 64 and a spring piece 65; the supporting plate 4 is provided with a V-shaped guide groove 41 and a limiting hole 42, the electromagnet 51 is arranged in the guide sleeve 56, one end of the ejector rod 52 is arranged in the guide sleeve 56, a pressure spring 57 is arranged between the ejector rod 52 and the electromagnet 51, the other end of the ejector rod 52 is hinged with one end of the shifting block 53, the middle part of the shifting block 53 is connected to the supporting plate 4 in a shaft coupling mode, the other end of the shifting block 53 is connected with a pin shaft 54, one end of the connecting rod 55 is hinged with the pin shaft 54, the other end of the connecting rod 55 is provided with a guide post 551, and the guide post 551 is located in the V-shaped guide groove 41; the turntable 61 and the blocking piece 62 are coaxially and axially connected to the support plate 4, the upper portion of the turntable 61 is provided with a limiting groove 611, a notch is formed in the lower portion of the turntable 61, the guide post 551 is simultaneously located in the notch, the upper end of the blocking piece 62 is provided with a limiting post 621, the limiting post 621 is simultaneously located in the limiting hole 42 and the limiting groove 611, the forward projection part at the bottom of the lower end of the blocking piece 62 shields the forward projection of the V-shaped guide groove 41 and has a gap with the inner wall of the V-shaped guide groove 41, the fixing seat 63 is fixed to the support plate 4, one end of the elastic piece 65 is fixed to the support plate 4, the other end of the elastic piece is connected with the fixing seat 63 through the spring 66, one end of the connecting piece 64 is hinged to the turntable 61, the other end of the connecting piece 64 is hinged to the elastic piece 65, one ends of the first shifting piece 7 and the second shifting piece 8 are respectively and axially connected to the support plate 4 and are respectively and coaxially provided with shaft holes 71 corresponding to the first connecting shaft and the second shaft, the other ends of the first shifting piece 7 and the second shifting piece 8 are respectively provided with waist holes 72, and the guide post 551 is simultaneously.

The driving mechanism has two states of normal driving and trigger driving, wherein in the normal state: when the electromagnet is not electrified, the push rod enables one end, provided with the pin shaft, of the shifting block to keep an upward posture under the action of the pressure spring, so that the guide post is positioned at the top of one end of the V-shaped guide groove, the bottom of the lower end of the blocking piece is positioned at one end, where the guide post is positioned, of the V-shaped guide groove, meanwhile, the first shifting piece and the second shifting piece are kept immovable, and the first connecting shaft and the second connecting shaft which are connected with the first shifting piece and the second shifting piece are kept immovable; when the driving is triggered: the electromagnet is powered on temporarily, the elastic force of a pressure spring is overcome to cause the ejector rod to contract, so that the shifting block rotates, one end of the shifting block, which is provided with a pin shaft, moves downwards, the guide post moves downwards along the V-shaped guide groove and abuts against the bottom of the lower end of the separation blade in the moving process to force the separation blade and the rotary disc to rotate at a small angle, the guide post is separated from the bottom of the lower end of the separation blade and then is positioned at the bottom of the V-shaped guide groove, the rotary disc drives the separation blade to return to the original position under the action of the spring and the elastic sheet, the separation blade continuously and partially shields the V-shaped guide groove at the end, one of the first shifting sheet and the second shifting sheet is kept still during the downward movement of the guide post, the other shifting sheet rotates correspondingly, then the electromagnet is powered off, the ejector rod extends under the action of the pressure spring to cause the reverse rotation of the shifting block, so that one end of the shifting block, which is provided with the pin shaft, the guide post moves upwards along the V-shaped guide groove, at the moment, the blocking piece partially blocks one end of the V-shaped guide groove, so that in the moving process, the guide post abuts against the bottom of the lower end of the blocking piece and moves to the other end of the V-shaped guide groove and is positioned at the top of the other end of the V-shaped guide groove; therefore, the driving mechanism triggers the driving process once, the first shifting piece and the second shifting piece rotate in the same direction for a specific angle, the driving requirements of the first connecting shaft and the second connecting shaft are met, the first connecting shaft and the second connecting shaft rotate for the specific angle and are kept, the electromagnet needs to be powered only in the triggering driving process, the electromagnet does not need to be powered in a conventional state, and the problem that when an original contactor acts, the contact coil continuously powers on the electromagnet and generates heat to consume energy is solved.

The three wiring terminals of the first wiring sheet are respectively connected with L1/L2/L3 of a three-phase power supply, the corresponding wire outlet terminal I is respectively and correspondingly connected with a motor load U/V/W, and the corresponding wire outlet terminal II is respectively and correspondingly connected with a motor load W/V/U; as shown by the arrows in fig. 4, when the first moving contact is connected with the fixed contact and the second moving contact is idle, the three-phase power supply L1/L2/L3 is respectively communicated with the motor load U/V/W, so that the motor operates in the forward direction, and as shown by the arrows in fig. 5, when the first moving contact is idle and the second moving contact is connected with the fixed contact, the three-phase power supply L1/L2/L3 is respectively communicated with the motor load W/V/U, so that the motor operates in the reverse direction.

The technical scheme in the embodiment of the application at least has the following technical effects or advantages:

3. through the structure of intensification, simplified the connecting wire between the electrical part by a wide margin, made the cost and the fault incidence of switching circuit to and overhaul the degree of difficulty and effectively reduced, thereby reduced the maintenance cost by a wide margin.

Claims

1. A positive and negative rotation motor change-over switch is characterized by comprising a wiring part, a control part and a transmission mechanism, wherein the wiring part comprises a first three-piece wiring piece and a shell, the first three-piece wiring piece is used for communicating a live wire of a three-phase power supply with a positive and negative rotation motor, the first three-piece wiring piece comprises a fixed contact, a first movable contact, a second movable contact, a wire inlet end, a wire outlet end and a wire outlet end, the fixed contact is connected with the wire inlet end, one end of the movable contact is connected with the wire outlet end, the other end of the movable contact is used for being connected with the fixed contact, one end of the movable contact is connected with the wire outlet end, the other end of the movable contact is connected with the wire outlet end, the fixed contact, the wire inlet end, the wire outlet end and the wire outlet end are fixedly connected with the shell, one end of the movable contact, which is connected with the wire outlet end, is axially connected with the shell, and the other end of the movable contact can abut against the fixed contact, one end of the moving contact II connected with the leading-out terminal II is connected with the shell in a shaft mode, the other end of the moving contact II can abut against the static contact, three lugs in the wiring part are arranged in parallel and fixedly connected with the control part, the transmission mechanism is used for connecting the driving mechanism in the control part with the moving contact I and the moving contact II in the wiring part, the transmission mechanism comprises a plurality of driving rods I and driving rods II, a connecting shaft I and a connecting shaft II, the driving rods I and the driving rods II correspond to the lugs I in a one-to-one mode and are arranged in the shell, the middle portions of the driving rods I and the driving rods II are respectively connected with the shell in a shaft mode, one end of each driving rod is hinged with the moving contact I and is used for driving the moving contact I to rotate, and one end of each driving rod II is hinged with the moving contact II and is used for driving the moving contact II to rotate, one end of the connecting shaft penetrates through the wiring part and is inserted in the middle of the shaft joint of the driving lever I and the shell to drive the driving lever I to rotate, the other end of the connecting shaft penetrates through the wiring part and is inserted in the middle of the shaft joint of the driving lever II and the shell to drive the driving lever II to rotate, the other end of the connecting shaft II is connected with the driving mechanism in the control part, the driving mechanism is used for driving the connecting shaft I and the connecting shaft II to synchronously rotate relatively so as to drive the movable contact I and the movable contact II to synchronously rotate, and the driving mechanism in the control part drives the movable contact I and the movable contact II to synchronously rotate through the transmission mechanism.

2. The switch according to claim 1, wherein: contacts are arranged at two ends of the fixed contact respectively, the first moving contact and the second moving contact are arranged at two ends of the fixed contact oppositely, and arc extinguishing pieces are arranged among the first moving contact, the second moving contact and the fixed contact.

3. The switch according to claim 1, wherein: the end parts of the other ends of the first shifting rod and the second shifting rod are respectively provided with a double-color code, and the shell is provided with a through hole at the corresponding position of the double-color code.

4. The switch according to any one of claims 1 to 3 for switching between a forward and a reverse rotation motor, wherein: the wiring portion further comprises a second wiring sheet, the two purposes of the wiring sheet are used for communicating the neutral line of the three-phase power supply and the forward and reverse rotating motor, and the second wiring sheet has the same structure as the wiring sheet.

5. The switch according to claim 1, wherein: the driving mechanism comprises a supporting plate, a triggering assembly, a switching assembly, a first shifting piece and a second shifting piece, the triggering assembly comprises an electromagnet, a mandril, a shifting block, a pin shaft and a connecting rod, and the switching assembly comprises a turntable, a blocking piece, a fixed seat, a connecting piece and an elastic piece; the supporting plate is provided with a V-shaped guide groove, the electromagnet is arranged in the guide sleeve, one end of the ejector rod is arranged in the guide sleeve, a pressure spring is arranged between the ejector rod and the electromagnet, the other end of the ejector rod is hinged with one end of the shifting block, the middle part of the shifting block is connected to the supporting plate in a shaft mode, the other end of the shifting block is connected with the pin shaft, one end of the connecting rod is hinged with the pin shaft, the other end of the connecting rod is provided with a guide post, and the guide post is located in the V-shaped guide groove; the turntable and the separation blade are coaxially coupled to the supporting plate, a limiting groove is formed in the upper portion of the turntable, a notch is formed in the lower portion of the turntable, the guide post is located in the notch, a limiting post is arranged at the upper end of the separation blade and located in the limiting groove, the forward projection portion of the bottom of the lower end of the separation blade shields the forward projection of the V-shaped guide groove, a gap exists between the forward projection portion and the inner wall of the V-shaped guide groove, the fixing seat is fixed to the supporting plate, one end of the elastic piece is fixed to the supporting plate, the other end of the elastic piece is connected with the fixing seat through a spring, one end of the connecting piece is hinged to the turntable, the other end of the connecting piece is hinged to the elastic piece, one end of the first shifting piece and one end of the second shifting piece are respectively and coaxially coupled to the supporting plate, shaft holes corresponding to the first connecting shaft and the second connecting shaft are respectively formed in the first shifting piece and the second shifting piece, waist holes are respectively formed in the other ends of the first shifting piece and the second shifting piece, and the guide post is located in the waist holes of the first shifting piece and the second shifting piece.

6. The switch according to claim 5, wherein: the supporting plate is provided with a limiting hole, and the limiting column is located in the limiting hole.