CN103730283B - A kind of three-station operating mechanism - Google Patents

Abstract

The invention discloses an operating mechanism for a three-position switch, which includes a partition, an output spindle, a drive mechanism and a limit mechanism; the drive mechanism controls the rotation of the output spindle, so that the output shaft on the output spindle turns The arm swings between the three stations of isolation, grounding and connection. The driving mechanism includes an operating spindle, a grounding spindle, and a connecting spindle. The operating spindle drives the grounding spindle and the connecting spindle respectively, and then drives the output The main shaft rotates to the grounding or connecting position; one end of the grounding main shaft and the connecting main shaft are respectively provided with a crank arm and a spring to drive the output main shaft to rotate rapidly; the limit mechanism is in the isolation, grounding and closing positions position of the output shaft crank arm to lock. The three-station operating mechanism of the present invention has better closing performance, can accurately limit the output spindle at the isolation position, the ground position and the connection position, and can reduce the wear and tear between the parts, and extend the limit to the maximum extent. Mechanical life of bit parts.

Description

An operating mechanism for a three-position switch

technical field

The invention relates to the technical field of high-voltage switches, in particular to an operating mechanism for a three-position switch.

Background technique

In recent years, with the continuous advancement of high-voltage switchgear technology, gas-insulated metal-enclosed switchgear has developed in the direction of miniaturization, compounding, multi-functionalization of components, and intelligence. The isolating switch and the grounding switch are combined into a three-position isolation/grounding switch , can save the electrical operation interlock, realize the natural mechanical interlock, there is no misoperation between the isolating switch and the grounding switch. In this way, it is necessary to use an operating mechanism that can not only realize the switching among the three positions of the connected position, the grounded position, and the isolated position, but also meet various mechanical and electrical interlock requirements to prevent misoperation and improve safety and reliability. Spend.

For example, the Chinese patent document CN200810071652 discloses a simple and reliable three-position mechanism output device, which includes: a base, a closing shaft output crank, a grounding shaft output crank, a dial and an output shaft. A dial pin is respectively fixed on the output crank arm of the closing shaft and the output crank arm of the grounding shaft. The dial is provided with a working groove, which includes a middle groove and two guide grooves arranged symmetrically on the left and right sides of the middle groove. Slide relative to the guide groove, and at the same time act on the guide groove to drive the dial to rotate, the dial rotates and slides along the middle groove relative to the other dial pin; wherein, the two dial pins have the following positioning states; they are respectively located at the two limit parts, or a dial The pin is located at the end of the guide groove, and the other pin is located at a limiting portion close to the guide groove. Although the structure and operation of the output device of the three-position mechanism are simple, it has the following defects during use:

①The surface of the dial is easy to rust, and the wear is more serious when it bears a large load, which directly affects the mechanical life;

② The closing capability with speed cannot be realized, and the supporting switch cannot close the short-circuit current;

③Because the pin needs to slide in the working groove, it is necessary to make the working groove slightly larger, and there are no other limiting parts in the working groove to assist the limit, so it is inevitable that there will be gaps in the connecting position and the grounding position. The relative swing causes the output angle of the output shaft to be inaccurate.

Contents of the invention

For this reason, the technical problem that the present invention mainly solves is that the three-position operating mechanism of the existing mechanical interlock has a short service life, and the position limit of the grounding and connection positions is unreliable, resulting in the problem that the output angle of the output shaft is not accurate enough;

The second technical problem to be solved by the present invention is that the existing three-position operating mechanism cannot provide output energy satisfying the closing short-circuit current of the earthing switch.

The purpose of the present invention is to provide a three-position operation that can provide the output energy that satisfies the closing short-circuit current of the grounding switch, and can accurately maintain the three-position switch in the "connected position", "isolated position" and "grounded position". mechanism.

To achieve the above object, the present invention adopts the following technical solutions:

An operating mechanism for a three-position switch, which includes a baffle, and the baffle includes a first baffle and a second baffle arranged in parallel at intervals, and the first baffle and the second baffle pass through several columns The pin is fixed; the output spindle is rotatably connected to the first partition and the second partition, the output spindle is fixedly connected with a driving part, and the output spindle extends out of the The end of the outer side of the first partition is fixedly connected with an output shaft crank arm, and the free end of the output shaft crank arm is connected with a return spring for resetting the output spindle to the isolation position; the driving mechanism controls the output shaft Rotate to make the crank arm of the output shaft swing between the three positions of isolation, grounding, and connection. The driving mechanism includes an operating main shaft, which is rotatably connected to the second partition. The end of the operating spindle far away from the first partition is the operating end, which is suitable for cooperation with an operating handle or an electric operating mechanism. The end of the operating spindle close to the first partition is covered with a first gear; the grounding spindle and Connecting the main shaft, the grounding main shaft and the connecting main shaft can be rotatably connected to the first partition and the second partition, and are located on both sides of the operating main shaft; the grounding main shaft A grounding linkage mechanism is provided, and the connecting spindle is provided with a connecting linkage mechanism; when the operating spindle rotates forward or reversely, the first gear drives the grounding linkage mechanism or the connecting linkage mechanism to move , the ground linkage mechanism or the connection linkage mechanism further drives the rotation of the driving part, so that the output spindle rotates from the isolated position to the grounded or connected position; the operating mechanism also includes a limit mechanism, which is , grounding, and the output shaft crank arm at the closing position are locked; the limit mechanism includes a connecting rod with one end hinged on the free end of the output shaft crank arm, and the other end of the connecting rod is set There are rollers, and strip-shaped holes matched with the rollers, the strip-shaped holes are formed on the first partition, and the rollers can slide along the strip-shaped holes; along the strip-shaped holes The first limiting part arranged in the length direction is used to limit the roller at the grounding or connected position, and the second limiting part is used to limit the roller at the isolation position.

The grounding linkage mechanism includes a grounding cam, a grounding one-way wheel, and a grounding gear that are successively sleeved on the grounding main shaft along the direction from the first partition to the second partition. The grounding cam, the grounding The one-way wheel is fixedly arranged on the grounding main shaft, and the grounding gear is rotatably sleeved on the grounding main shaft; the grounding gear is limited along the axial direction of the grounding main shaft, and the grounding gear is close to the A grounding slider is hinged on the side of the grounding one-way wheel, and the grounding one-way wheel is provided with a grounding gap that cooperates with the grounding slider. When the grounding slider rotates with the grounding gear, it moves along the grounding The wheel surface of the one-way wheel rotates; when the operating main shaft is rotated in the forward direction, the grounding slider can slide into the grounding gap, resist and push the grounding one-way wheel to rotate, and then drive the grounding cam to rotate, The grounding cam drives the driving part to rotate, so that the crank arm of the output shaft rotates to the grounding position; when the operating main shaft is rotated in the opposite direction, the grounding slider always slides along the wheel surface of the grounding one-way wheel ; The connection linkage mechanism includes a connection cam, a connection one-way wheel, and a connection gear that are sequentially sleeved on the connection main shaft along the direction from the first partition to the second partition. The connection cam and the connection one-way wheel are fixedly arranged on the connection main shaft, and the connection gear is rotatably sleeved on the connection main shaft through a sleeve; Connect the axial limit of the main shaft, the connecting gear is hinged with a connecting slider on the side close to the connecting one-way wheel, and the connecting one-way wheel is provided with a The connection gap, the connection slider rotates along the wheel surface of the connection one-way wheel when the connection gear rotates; when the operation spindle is rotated in the opposite direction, the connection slider can be along the The wheel surface of the connected one-way wheel slides into the connected gap, resists and pushes the connected one-way wheel to rotate, and then drives the connected cam to rotate, and the connected cam drives the drive The rotating part rotates to turn the crank arm of the output shaft to the connected position; when the operating main shaft is rotated forward, the connecting slider always slides along the wheel surface of the connecting one-way wheel.

The grounding notch is a groove formed by indenting from the wheel surface into its body along the rotation direction of the grounding one-way wheel during grounding operation, the grounding notch includes a grounding transition section for the grounding slider to slide, and The ground contact part for the ground slider to push the ground one-way wheel to rotate; the connection gap is formed by recessing from the wheel surface into its body along the rotation direction when the one-way wheel is turned on. The connection gap includes a connection transition section for the connection slider to slide, and a connection interference part for the connection slider to push the connection one-way wheel to rotate.

The grounding slider includes a grounding driving part that cooperates with the grounding contact part, and a tail end extending away from the grounding one-way wheel. The hinge shaft of the grounding slider is sleeved with a grounding driving part that drives the grounding part. The torsion spring that is close to the wheel surface of the grounding one-way wheel; the fixed sleeve on the output spindle is provided with an interlocking plate, and the grounding slider drives the rotation of the grounding one-way wheel, and then drives the grounding cam to drive the The output spindle rotates to the grounding position; the connecting slider includes a connecting driving part that cooperates with the connecting contact part, and a tail end extending away from the connecting one-way wheel, and the connecting slider A torsion spring is sleeved on the hinge shaft to drive the connecting drive part to be close to the wheel surface of the connecting one-way wheel; the connecting slider drives the connecting one-way wheel to rotate, and then drives the connecting one-way wheel to rotate. The cam drives the output spindle to turn to the ON position; the interlock plate includes a top end and a bottom that is substantially fan-shaped; when the output spindle is in the ground position, if the operating spindle continues to be rotated forward, the The tail end of the connecting slider firstly touches the bottom of the interlocking plate to prevent the operation spindle from continuing to rotate forward; if the operation spindle is rotated in the reverse direction, the tail end of the grounding slider First, the top end of the interlocking plate is touched to prevent the operation spindle from continuing to rotate in reverse; when the output spindle is in the on position, if the operation spindle is rotated in reverse, the ground slider The tail end of the connecting slider first touches the bottom of the interlocking plate to prevent the operation spindle from continuing to rotate in reverse; if the operation spindle is rotated forward, the tail end of the connecting slider first touches the the top end of the interlocking plate to prevent the operating spindle from continuing to rotate in the forward direction.

The output main shaft is located in the middle of the line connecting the grounding main shaft and the connection main shaft, and the driving and rotating parts are two driving and rotating plates parallel to each other and basically forming an isosceles triangle, wherein the top of the driving and rotating plates The corner side is sleeved on the output main shaft, and the bottom corner side of the drive plate is respectively hinged with a grounding roller and a connecting roller, the grounding roller cooperates with the grounding cam, and the connecting roller Cooperate with the engaging cam.

A second gear is rotatably sleeved on the output main shaft, and the second gear meshes with the first gear, the grounding gear, and the connection gear respectively, and the first gear passes through the second gear meshed with it. The gear drives the ground linkage mechanism or the connection linkage mechanism to move.

The end of the grounding main shaft extending out of the plate surface of the second partition is provided with a grounding arm, and the end of the connecting main shaft extending out of the plate surface of the second partition is provided with a connecting arm, The free ends of the grounding lever and the connecting lever are respectively connected with a grounding extension spring and a connecting extension spring, and the other ends of the grounding extension spring and the connecting extension spring are respectively hung on the column pin; When the operating spindle drives the grounding spindle or the connecting spindle to rotate, the grounding tension spring or the connecting spring is first stretched to store energy, and when the grounding spindle or the connecting spindle rotates half a circle When the grounding tension spring or the connecting tension spring reaches the maximum stretching amount, the grounding tension spring or the connecting tension spring is over-centered and released rapidly, driving the grounding main shaft or the connecting The main shaft completes the grounding or connecting action.

Driven by the return spring, the roller moves from the connected or grounded position to the isolated position, and in the isolated position, the return elastic direction of the return spring is consistent with and coincides with the length direction of the strip hole.

The first limiting part is a first limiting shaft, and the first limiting shaft is rotatably connected to the second partition and extends to the bar-shaped hole inside the first partition place; the first limiting shaft is sleeved with a first limiting torsion spring and a limiting part that drives the first limiting shaft to rotate in one direction; The limit part restricts the limit pin of the first limit shaft to continue to rotate; the end of the first limit shaft extending to the first partition is a semi-shaft structure. In the initial state, the half shaft There is a certain angle between the semi-axis plane of the structure and the first side of the strip-shaped hole, and the semi-axis structure is inclined into the strip-shaped hole; When moving through the position, by squeezing the semi-axis plane, the torsion force of the first limit torsion spring is overcome, and the first limit shaft is driven to rotate until the semi-axis plane is substantially parallel to the first side , after the roller passes over the first limit shaft, the first limit torsion spring on the first limit shaft drives the first limit shaft to return to the lower end of the half shaft structure and tilts to the In the bar-shaped hole, to limit the movement of the roller to the isolation position under the action of the return spring.

The second limiting part is a second limiting shaft, which is rotatably connected to the second partition and extends to the bar-shaped hole inside the first partition and is located on the second side of the bar-shaped hole; the second limit shaft is sleeved with a second limit torsion spring that drives the second limit shaft to rotate in one direction, and the second One end of the limit shaft extending to the bar-shaped hole is a semi-shaft structure; a linkage mechanism is set between the second limit shaft and the first limit shaft, and the linkage mechanism is suitable for When the limit shaft releases the limit on the roller, it drives the second limit shaft to rotate until there is a certain angle between the half axis plane of the half shaft structure and the second side, and the The semi-axis structure is inclined into the strip-shaped hole; when the roller moves from the grounded or connected position to the isolated position, it overcomes the first position by squeezing the semi-axis plane of the second limiting shaft The torsion force of the two limiting torsion springs drives the second limiting shaft to rotate until the semi-axis plane is substantially parallel to the second side, and after the roller passes over the second limiting shaft, the second The second limit torsion spring on the two limit shafts drives the second limit shaft to reset until the half shaft structure tilts into the bar-shaped hole, so as to limit the movement of the rollers to the grounded or connected position.

The linkage mechanism includes a linkage piece fixed on the second limit shaft, and a support piece fixed on the first limit shaft; The extended bending part, the second limiting torsion spring sleeved on the second limiting shaft drives the bending part to keep in close contact with the support; when the first limiting shaft is rotated to release When limiting the roller, the included angle between the semi-axis plane of the second limiting shaft and the second side of the bar-shaped hole increases and the first limiting shaft returns to its initial position During the process, the supporting member drives the angle between the semi-axis plane of the second limiting shaft and the second side of the bar-shaped hole to an initial angle by pushing the bending portion.

Beneficial effects of the present invention:

1. When the operating spindle of the present invention rotates forward, it drives the output spindle to perform the grounding action, and when it rotates in the reverse direction, it drives the output spindle to perform the connecting action, and the output spindle is positioned by the first limiter at the grounding and connecting position, and at the isolation position The position of the second limit part is used to ensure that the output spindle can be accurately positioned at the isolation position, the ground position, and the connection position, thereby ensuring that the output spindle has a relatively accurate output angle; in addition, the present invention is achieved through the first The limit part and the second limit part limit the specific position of the roller in the bar-shaped hole and then limit the output angle of the output spindle. The roller and the side wall of the bar-shaped hole are a kind of rolling fit, which greatly reduces the mutual The friction force between them maximizes the mechanical life of the limiting parts.

2. In the operating mechanism of the present invention, one end of the grounding main shaft and the connecting main shaft on the operating surface are respectively provided with a grounding toggle arm, a grounding extension spring, a connecting toggle arm, and a connecting extension spring. The grounding action and the connecting action All of them release energy through the tension spring to realize fast action, which makes the switch equipped with the three-position operating mechanism of the present invention have better closing performance.

3. Both the grounding linkage mechanism and the connection linkage mechanism of the present invention are composed of corresponding gears, one-way wheels, and cams, and the gears push the one-way wheel to rotate in one direction through the slider hinged on its side, and then realize the grounding action or connection. This linkage mechanism is not only simple in structure and convenient in operation, but also has high transmission accuracy and can ensure the output angle of the output spindle.

4. The grounding cam and connecting cam of the present invention realize rolling cooperation through the grounding roller, connecting roller and the drive rotation part on the output spindle respectively, which can greatly reduce the impact force and friction between the corresponding cam and the corresponding roller Force, thereby reducing wear and prolonging service life.

5. When the operating mechanism of the present invention is switched from the isolation position to the grounding position, the operating main shaft of the present invention is rotated clockwise, and the grounding slider rotates by pushing the grounding one-way wheel, and then drives the output main shaft to rotate to the grounding position, and the interlocking plate first Pull the grounding slider out of the grounding gap. If you continue to rotate the operating handle clockwise at this time, the connecting slider will touch the bottom of the interlocking plate after touching the interlocking plate, so as to limit the operation handle to continue counterclockwise. Rotate; at this time, if the operating handle is turned counterclockwise, the grounding slider will touch the top of the interlocking plate after touching the interlocking plate, so as to limit the operating handle to continue to rotate counterclockwise; only when the operating handle is inserted into the first limit half In the shaft, the interlock plate can be returned to the middle position only after it is rotated counterclockwise about 45°, and the mechanical interlock is released. On the contrary, similarly, the mechanical interlock when the isolation position is switched to the connection position can be obtained. Therefore, the operating mechanism of the present invention has a better two-way interlocking function in both the grounding position and the on position, and can effectively avoid misoperation.

6. The first limit shaft and the second limit shaft of the present invention are linked through a linkage mechanism. When the roller moves downward from the isolation position to the grounding or connection position, it can push the first limit shaft and the second limit shaft in turn. The limiting half shaft rotates in the direction where the included angle between the half shaft plane and the side of the strip hole decreases; and when the roller is switched from the grounding position or the on position to the isolation position, it needs to move along the strip shape. The hole moves upwards. At this time, the first limit shaft must be rotated until the angle between the first side and the first side is close to zero, so that the roller can be unlocked from the grounding position or the connected position, and then continue to move upwards. While rotating the first limiting shaft, the second limiting shaft will further rotate clockwise under the action of its own torsion spring to increase the angle between the semi-axis plane of the second limiting semi-axis and the second side. After the included angle is increased, the second limiting shaft can limit the roller from bouncing downward from the top of the bar-shaped hole, thereby limiting the output spindle at the isolation position. The limiting mechanism of the present invention is a purely mechanical structure, and fully utilizes the different action tendencies of the rollers on the half shaft structure at different rotation angles, thereby achieving a good limiting effect. The entire limiting structure is simple, easy to install and operate , and the limit is accurate.

Description of drawings

In order to make the content of the invention more easily understood, the present invention will be described in further detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

Fig. 1 is the overall structural representation of operating mechanism of the present invention;

Fig. 2 is a side view of the operating mechanism of the present invention;

Fig. 3 is the front view after removing the panel of the operating mechanism of the present invention;

Fig. 4 is the A-A direction sectional view of Fig. 2;

Fig. 5 is the C-C direction sectional view of Fig. 2;

Figure 6 is a rear view of the operating mechanism of the present invention when it is in an isolated position;

Fig. 7 is the rear view when the operating mechanism of the present invention is in the grounding position;

Figure 8 is a rear view of the operating mechanism of the present invention when it is in the on position;

Fig. 9 is a B-B sectional view when the operating mechanism of the present invention is in an isolated position;

Fig. 10 is a C-C sectional view when the operating mechanism of the present invention is connected or grounded;

Fig. 11 is a schematic diagram of the structure of the A-A direction hiding the grounding gear and connecting the gear when the operating mechanism of the present invention is in the isolated position;

Fig. 12 is a schematic diagram of the structure of the A-A direction hiding the grounding gear and connecting the gear when the operating mechanism of the present invention is in the grounding position;

Fig. 13 is a schematic diagram of the structure of the A-A direction after the grounding gear is hidden and the gear is turned on when the operating mechanism of the present invention is in the on position;

Fig. 14 is a structural schematic diagram of the first limit shaft and the second limit shaft of the present invention when they are coordinated;

Fig. 15 is a rear view of the first limit shaft and the second limit shaft of the present invention when they are coordinated;

Fig. 16 is a schematic structural view of the first limiting shaft of the present invention.

The reference signs in the figure represent:

10-panel; 11-first partition; 110-strip hole; 111-first side, 112 second side; 12-second partition; 2-column pin; 3-operating main shaft; 30-the first 1st gear; 31-second gear; 4-grounding main shaft; 41-grounding arm; 42-grounding extension spring; 43-grounding cam; 44-grounding one-way wheel; 440-grounding gap; 441-grounding transition section; 442 - ground contact part; 45 - ground gear; 450 - ground slide; 451 - ground drive; 452,552 - tail; 5 - connect main shaft; 51 - connect crank arm; -connect the cam; 54-connect the one-way wheel; 540-connect the gap; 541-connect the transition section; 542-connect the conflicting part; 55-connect the gear; Drive part; 6-output spindle; 60-interlocking plate; 601-top; 602-bottom; 61-output shaft crank arm; 62-return spring; 63-roller; ;642-connected roller; 65-connecting rod; 7-first limit shaft; 71-first limit torsion spring; 83-second limit torsion spring; 72-limit part; 73-limit pin ; 74, 82-half-axis plane; 75-support piece; 8-second limit shaft; 81-linkage piece; 84-pin; 810-bending part.

Detailed ways

1-6, an operating mechanism for a three-position switch, which includes a first partition 11, a second partition 12, and a panel 10 arranged in parallel at intervals, the first partition 11, the second partition 12 is fixed by several column pins 2; the output spindle 6 is rotatably connected to the first partition 11 and the second partition 12, and the output spindle 6 is fixedly connected with a drive The rotating part 64 can drive the output spindle 6 to rotate to the grounding position or the connected position by turning the driving rotating part 64; the end of the output spindle 6 extending outside the first partition 11 is fixed An output shaft crank arm 61 is connected, and the free end of the output shaft crank arm 61 is connected with a reset spring 62 for resetting the output spindle 6 to an isolated position; the driving mechanism controls the rotation of the output spindle 6 so that the The output shaft crank arm 61 swings between the three stations of isolation, grounding and connection. The drive mechanism includes an operating main shaft 3, which is rotatably connected to the second partition 12, and the end of the operating main shaft 3 away from the first partition 11 is an operating end, which is suitable for use with The operating handle is matched, and of course the operating end can also be driven by an electric operating mechanism to realize electric control; the end of the operating main shaft 3 close to the first partition 11 is provided with a first gear 30; the grounding main shaft 4 and the connecting Through the main shaft 5, the grounding main shaft 4 and the connecting main shaft 5 can be rotatably connected to the first partition 11 and the second partition 12, and are located on both sides of the operating main shaft 3; The grounding main shaft 4 is provided with a grounding linkage mechanism, and the connection main shaft 5 is provided with a connection linkage mechanism; the grounding main shaft 4 and the connection main shaft 5 extend from one end far away from the first partition 11 out of the plate surface of the second partition 12, and the ends are respectively provided with a grounding arm 41 and a connecting arm 51, and the free ends of the grounding arm 41 and the connecting arm 51 are respectively connected to There are grounding extension springs 42 and connection extension springs 52, the other ends of the grounding extension springs 42 and the connection extension springs 52 are respectively hung on the pins 2, and the grounding arm is connected through the panel 10. 41. The connection crank arm 51, the grounding tension spring 42, and the connection tension spring 52 are blocked, and the corresponding position on the panel 10 is provided with a through hole for the operation handle to be inserted; the operation spindle 3 When the grounding main shaft 4 or the connecting main shaft 5 is driven to rotate, the grounding extension spring 42 or the connecting extension spring 52 is first stretched to store energy, and when the grounding main shaft 4 or the connecting main shaft 5 When rotating half a circle, the grounding extension spring 42 or the connecting extension spring 52 reaches the maximum stretch; when the grounding extension spring 42 or the connecting extension spring 52 passes the middle (that is, crosses the maximum stretching length ) quickly shrinks and releases energy, driving the grounding spindle 4 or the connecting spindle 5 to complete the grounding or connecting action in an instant, so that the switch has the ability of quick action.

In this embodiment, the output main shaft 6 is rotatably provided with a second gear 31, and the second gear 31 meshes with the first gear 30, the grounding gear 45 and the connecting gear 55 respectively. The first gear 30 drives the grounding linkage mechanism or the connecting linkage mechanism to move through the second gear 31 meshing with it; The output spindle 6 rotates from the isolated position to the grounded or on position.

Referring to Figures 7-10, the operating mechanism of the present invention also has a limit mechanism to lock the output shaft crank arm 61 in the isolation, grounding, and closing positions; the limit mechanism includes one end hinged on the The connecting rod 65 on the free end of the output shaft turning arm 61, the other end of the connecting rod 65 is provided with a roller 63, and the strip hole 110 matched with the roller 63, the strip hole 110 is formed on the On the first separator 11, the roller 63 can slide along the strip-shaped hole 110; in this implementation, the strip-shaped hole 110 is set along the vertical direction; when the output spindle 6 is grounded or connected position, the roller 63 is limited by the first stopper to prevent the roller 63 from moving upward along the strip hole 110; the roller 63 moves upward from the grounding position or the connected position, After reaching the top of the bar-shaped hole 110, it will move downward due to the inertia of the parts, and then drive the output spindle 6 to rotate at a certain angle, which will affect the safe insulation distance of the switch; Movement, the position near the top of the bar-shaped hole 110 is provided with a second limiting portion that prevents the roller 63 from moving downward.

Referring to Fig. 4 and Figs. 11-13, in this embodiment, the grounding linkage mechanism includes grounding cams that are sequentially sleeved on the grounding spindle 4 along the direction from the first partition 11 to the second partition 22 43. Grounding one-way wheel 44 and grounding gear 45, the grounding cam 43 and the grounding one-way wheel 44 are fixedly arranged on the grounding main shaft 4, and the grounding gear 45 is rotatably sleeved on the grounding main shaft 4; the grounding gear 45 is limited along the axial direction of the grounding main shaft 4, and the grounding slider 450 is hinged on the side of the grounding gear 45 close to the grounding one-way wheel 44, and the grounding one-way wheel 44 is provided with a grounding notch 440 matched with the grounding slider 450, and the grounding slider 450 rotates along the wheel surface of the grounding one-way wheel 44 when the grounding gear 45 rotates; When the main shaft 3 is operated, the grounding slider 450 can slide into the grounding gap 440, resist and push the grounding one-way wheel 44 to rotate, and then drive the grounding cam 43 to rotate, and the grounding cam 43 drives the grounding cam 43 to rotate. The driving part 64 rotates, so that the output shaft crank arm 61 rotates to the grounding position; when the operating spindle 3 is rotated in the opposite direction, the grounding slider 450 always slides along the wheel surface of the grounding one-way wheel 44, and It cannot cooperate with the ground notch 440 to push the ground one-way wheel 44 to rotate.

The connection linkage mechanism includes a connection cam 53, a connection one-way wheel 54, a connection Gear 55, the connecting cam 53 and the connecting one-way wheel 54 are fixedly arranged on the connecting main shaft 5, and the connecting gear 55 is rotatably sleeved on the connecting main shaft 5 through a bushing Above; the connection gear 55 is limited along the axial direction of the connection main shaft 5, and the connection slider 550 is hinged on the side of the connection gear 55 close to the connection one-way wheel 54, the Connecting the one-way wheel 54 is provided with a connecting gap 540 that cooperates with the connecting slider 550, and the connecting slider 550 rotates along the connecting one-way wheel 54 when the connecting gear 55 rotates. When the operation main shaft 3 is rotated in the opposite direction, the connection slider 550 can slide into the connection gap 540 along the wheel surface of the connection one-way wheel 54, resisting and pushing the connection The connecting one-way wheel 54 rotates, and then drives the connecting cam 53 to rotate, and the connecting cam 53 drives the rotating part 64 to rotate, so that the output shaft crank arm 61 rotates to the connecting position; When the operating spindle 3 is rotated, the connection slider 550 always slides along the wheel surface of the connection one-way wheel 54 , and cannot cooperate with the connection gap 540 to push the connection one-way wheel 54 to rotate.

Referring to FIG. 12 , the grounding notch 440 in this embodiment is a groove formed by indenting from the wheel surface into its body along the rotation direction of the grounding one-way wheel 44 during grounding operation, and the grounding notch 440 includes a The grounding transition section 441 where the grounding slider 450 slides, and the grounding contact portion 442 for the grounding slider 450 to push the grounding one-way wheel 44 to rotate. When the grounding slider 450 rotates along the direction from the grounding transition section 441 to the grounding contact portion 442, it can cooperate with the grounding contact portion 442 and push the grounding one-way wheel 44 to rotate, thereby pushing the output The main shaft 6 rotates to the grounding position; when the grounding slider 450 rotates along the direction from the grounding contact portion 442 to the grounding transition section 441, it cannot form a cooperative relationship with the grounding contact portion 442. At this time, the grounding slider 450 Sliding along the wheel surface of the grounding one-way wheel 44 , but cannot push the grounding one-way wheel 44 to rotate.

Referring to FIG. 12 , the connecting notch 540 is a groove formed by indenting from the wheel surface into its body along the rotation direction of the connecting one-way wheel 54 when it is turned on. The connecting notch 540 includes a groove for the The connection transition section 541 through which the connection slider 550 slides, and the connection resistance part 542 for the connection slider 550 to push the connection one-way wheel 54 to rotate. When the connection slider 550 rotates along the direction from the connection transition section 541 to the connection interference part 542, it can cooperate with the connection resistance part 542 and push the connection one-way wheel 54 to rotate, Then push the output spindle 6 to turn to the on position; when the on slider 550 rotates along the direction from the on-interference portion 542 to the on-transition section 541, it cannot cooperate with the on-interference portion 542 At this time, the connection slider 550 slides along the wheel surface of the connection one-way wheel 54, but cannot push the connection one-way wheel 54 to rotate.

Referring to FIG. 13 , the grounding slider 450 in this embodiment includes a grounding drive portion 451 that cooperates with the grounding contact portion 442 , and a tail end 452 that extends away from the grounding one-way wheel 44 . The articulated shaft of the block 450 is provided with a torsion spring that drives the grounding drive part 451 to be close to the wheel surface of the grounding one-way wheel 44; the output spindle 6 is fixedly sleeved with an interlocking plate 60, and the grounding slide Block 450 drives the grounding one-way wheel 44 to rotate, and then drives the grounding cam 43 to drive the output spindle 6 to rotate to the grounding position. The tail end 452 of the grounding slider 450 rotates around its own hinge axis and keeps the grounding drive part 451 away from the grounding notch 440 , after which the grounding slider 450 continues to rotate with the grounding gear 45 , the ground driving part 451 separated from the interlocking plate 60 is in close contact with the wheel surface of the ground cam 43 .

Referring to FIG. 11 , the connecting slider 550 includes a connecting driving part 551 cooperating with the connecting resisting part 542 , and a tail end 552 extending away from the connecting one-way wheel 54 . The hinge shaft of the block 550 is sleeved with a torsion spring that drives the connecting drive part 551 to be close to the wheel surface of the connecting one-way wheel 54; the connecting slider 550 drives the connecting one-way wheel 54 to rotate , and then drive the connection cam 53 to drive the output spindle 6 to rotate to the connection position, and at the same time, the interlocking plate 60 moves the tail end 552 of the connection slider 550 to make the connection The connecting slider 550 rotates around its own hinge axis and makes the connecting driving part 551 away from the connecting gap 540, after that, the connecting slider 550 continues to rotate with the connecting gear 55, and is interlocked with the connecting gear 55. After the plate 60 is separated, the connecting driving part 551 is in close contact with the wheel surface of the connecting cam 53 .

The interlocking plate 60 includes a top end 601 and a bottom 602 in a substantially fan-shaped structure; referring to FIG. 12 , when the output spindle 3 is at the grounding position, if the operating spindle 3 continues to rotate forward (clockwise), Then the tail end 552 of the connecting slider 550 (the connecting slider indicated by the dotted line in FIG. 12 ) first touches the bottom 602 of the interlocking plate 60 to prevent the operating spindle 30 from continuing to rotate forward. ; If the operating spindle 3 is rotated in the opposite direction (counterclockwise), the tail end 452 of the grounding slider 450 first touches the top 601 of the interlocking plate 60 (the grounding slider indicated by the solid line in Figure 12 block) to prevent the operating spindle 30 from continuing to rotate in reverse. Referring to Fig. 13, at this moment, the output spindle 6 is in the ON position, if the operation spindle 3 continues to be rotated in reverse, the tail end of the ground slider 450 (the ground slider indicated by the dotted line in Fig. 13 ) will 452 first interferes with the bottom 602 of the interlocking plate 60 to prevent the operation spindle 30 from continuing to rotate in reverse; The tail end 552 of the indicated connecting slide block) first abuts against the top end 601 of the interlocking plate 60 to prevent the operation spindle 30 from continuing to rotate forward.

In this embodiment, the output main shaft 6 is located in the middle of the line connecting the grounding main shaft 4 and the connection main shaft 5, and the driving and rotating parts 64 are two driving and rotating plates that are parallel to each other and basically form an isosceles triangle. , wherein the top angle side of the driving rotation plate is sleeved on the output main shaft, and the two bottom angle sides of the driving rotation plate are respectively hinged with grounding rollers 641 and connection rollers 642, and the grounding rollers 641 Cooperating with the grounding cam 43 , the engaging roller 642 is cooperating with the engaging cam 53 .

14-16, the first limiting part in this embodiment is the first limiting shaft 7, the first limiting shaft 7 is rotatably connected to the second partition 12, and extends to the bar-shaped hole 110 inside the first separator 11, and the axis of the first limiting shaft 7 is substantially flush with the first side 111 of the bar-shaped hole 110; the first The limiting shaft 7 is sleeved with a first limiting torsion spring 71 and a limiting part 72 that drives the first limiting shaft 7 to rotate in one direction; The position part 72 restricts the limit pin 73 of the first limit shaft 7 to continue to rotate; the end of the first limit shaft 7 extending to the first partition 11 is a half-shaft structure. In the initial state, There is a certain angle between the semi-axis plane 74 of the semi-axis structure and the first side 111 of the strip-shaped hole 110. In this embodiment, the included angle is about 48 degrees. The lower end of the semi-axis structure is located at In the strip-shaped hole 110, and the normal of the semi-axis plane 74 is set obliquely upward; when the roller 63 moves downward from the upper end of the strip-shaped hole 110, , overcome the torsion force of the first limiting torsion spring 71, and drive the first limiting shaft 7 to rotate until the semi-axis plane 74 is substantially parallel to the first side 111, and the roller 63 is downward After crossing the first limiting shaft 7, the first limiting torsion spring 71 on the first limiting shaft 7 quickly drives the first limiting shaft 7 to return to the half-axis plane 74 to be inclined to the The first side 111 forms an included angle of 48 degrees, and the roller 63 moves upward under the pulling force of the return spring 62 and collides with the semi-axis structure axial surface of the first limit shaft 7, and the The first limit shaft 7 exerts a circumferential torsion force, which is opposite to the axial torsion force applied by the limit pin 73 on the first limit shaft. At this time, the roller 63 is limited to the ground or contact pass location.

The second limiting part is the second limiting shaft 8, the second limiting shaft 8 is rotatably connected to the second partition 12, and extends to all the inside of the first partition 11. The bar-shaped hole 110; the second limit shaft 8 is sleeved with a first limit torsion spring 71 that drives the second limit shaft 8 to rotate in one direction, and is located at the first bar-shaped hole 110. On the side of the two sides 112, one end of the second limiting shaft 8 extending to the bar-shaped hole 111 is a half-shaft structure, and the half-axis plane 82 of the half-shaft structure has a certain relationship with the second side 112. The included angle is about 23 degrees at the grounding position. At this time, if the roller 63 moves downward from the top of the bar-shaped hole 110, it will push the second limiting shaft 8 toward its semi-axis. The angle between the plane 82 and the second side 112 becomes smaller; the normal of the semi-axis plane 82 is obliquely downward; the second limiting shaft 8 and the first limiting shaft 7 pass through The linkage mechanism is linked so that when the first limit shaft 7 releases the limit of the roller 63, the second limit shaft 8 increases toward the angle between it and the second side 112. Rotate in a large direction, and increase the included angle until when the roller 63 moves downward from the top of the bar-shaped hole 110, the roller 63 and the second limiting shaft 8 form an arc The tangential state restricts the roller 63 from continuing to move downward.

In this embodiment, the linkage mechanism between the first limiting shaft 7 and the second limiting shaft 8 includes a linkage 81 fixedly arranged on the second limiting shaft 8, and a fixedly arranged The support member 75 on the first limiting shaft 7; the linkage member 81 is formed with a bent portion 810 extending toward the first limiting shaft 7, sleeved on the second limiting shaft 8 The second limiting torsion spring 71 drives the inner side of the bending portion 810 into close contact with the support member 75, and one end of the second limiting torsion spring 71 abuts on the second limiting shaft 8, which The other end is against the pin 84, and the pin 84 is fixed on the second partition 12; when the first limit shaft 7 is rotated to release the limit of the first limit shaft 7 to the roller 63 , the angle between the semi-axis plane 82 of the second limiting shaft 8 and the second side 112 of the strip hole 110 increases by 23 degrees, that is, the second limiting shaft 8 The included angle between the semi-axis plane 82 and the second side 112 is basically 46 degrees. At this time, if the roller 63 moves downward from the top of the strip hole 110, the roller will The roller 63 forms an arc tangent state with the second limiting shaft 8, restricting the roller 63 from continuing to move downward, thereby limiting the inertial overshoot of the output spindle within a certain range. Finally, the roller 63 stays at the top of the bar-shaped hole 110 under the pulling force of the return spring 62; when the first limiting shaft 7 is reset to the initial position, the support member 75 is pushed The bending part 810 reduces the angle between the semi-axis plane 82 of the second limiting part 8 and the second side 112 of the bar-shaped hole 110 by 23 degrees, and at this time, all components are reset to initial state.

The working principle of the three-station operation of the present invention is explained below in conjunction with the accompanying drawings:

1. Switch from the isolated position to the grounded position

Referring to Figures 1-4, insert the operating handle into the operating end of the operating spindle 3 and turn it clockwise to drive the first gear 30 to rotate, and the first gear 30 drives the ground gear 45 to rotate through the second gear 31 , when the grounding slider 450 hinged on the grounding gear 45 rotates into the grounding notch 440 on the grounding one-way wheel and collides with the grounding contact part 442, it drives the grounding one-way wheel 44 to rotate , and then drive the grounding main shaft 4 and the grounding cam 43 to rotate; when the grounding main shaft 4 rotates, the grounding extension spring 42 is stretched to store energy by the grounding arm 41, and when the grounding main shaft 4 rotates half a circle , the ground extension spring 42 is stretched to the maximum distance, and now the extension spring 42 has the maximum elastic potential energy; continue to rotate the operating handle to drive the ground main shaft 4 to continue to rotate, and the ground extension spring 42 After passing through, the energy is quickly released and contracted, and at the same time, the grounding main shaft 4 is pulled to rotate rapidly, and the grounding main shaft 4 hits the drive rotation part 64 on the output main shaft 6 through the arc surface of the grounding cam 43, thereby causing the output Main shaft 6 rotates to grounding position, referring to Fig. 7, Fig. 10, Fig. 12.

During the rotation of the grounding spindle 6 from the isolation position to the grounding position, referring to FIG. 9 , the roller 63 is first driven to move downward from the top of the bar-shaped hole 110 . The included angle between the semi-axis plane 82 and the second side 112 is about 23 degrees. When the roller 63 moves downward, it will drive the second limiting shaft 8 to rotate counterclockwise. When the included angle of the second side 112 is close to 0 degrees, the roller 63 crosses the second half-shaft 8 and continues to move downward, and then touches the half-shaft of the first shaft 7 plane 74, and pushes the first limiting half shaft 7 to rotate counterclockwise; when the roller 63 passes over the first limiting shaft 7 downward, the grounding cam 43 just passes through the driving part 64 Drive the output main shaft 6 to the grounding position, then the grounding roller 63 continues to move downwards and separates from the first limiting shaft 7. At this time, the first limiting shaft 7 is at the first Under the action of the limiting torsion spring 71, quickly reset to the angle between the semi-axis plane 74 and the first side 111 is about 48 degrees, and then the reset spring 62 drives the output spindle 6 to rotate through the output shaft crank arm 61, and At the same time, the roller 63 is pulled to move upwards along the bar-shaped hole 110 , and is positioned at the grounding position by the first limiting axle 7 .

When the operating main shaft 3 rotates clockwise to perform the grounding action, the second gear 31 drives the connecting gear 55 to rotate at the same time, but since the connecting slider 550 on the connecting gear 55 is moving along the When connecting the contacting portion 542 on the wheel surface of the one-way wheel 54 to sliding in the direction of the connecting transition section 541, the connecting slider 550 cannot form an interference fit with the contacting portion 542, so it will not push the Connect one-way wheel 54 and rotate.

Second, the isolation position is converted to the connection position

When switching from the isolation position to the connection position, its working principle is the same as that of the isolation position to the ground position, except that the operating spindle 3 needs to be rotated counterclockwise at this time, and the operating spindle 3 will drive the Turn on the main shaft 4 and turn the output main shaft 6 to the on position, see Fig. 8, 10 and Fig. 13 .

3. The ground position or the connection position is converted to the isolation position

Referring to Fig. 9, insert the operating handle into the operating end of the first limiting shaft 7 and turn it counterclockwise about 48 degrees, at this time, the semi-axis plane of the first limiting shaft 7 is aligned with the first side The included angle between 111 is basically 0 degrees, and the second limiting shaft 8 is further rotated clockwise by about 23 degrees under the action of the second limiting torsion spring 71, and the semi-axis of the second limiting shaft 8 The angle between the plane 82 and the second side 112 increases from 23 degrees to about 46 degrees; at this time, the first limiting shaft 7 releases the limiting effect on the roller 63, and the roller Under the action of the return spring 62, the child 63 moves upward along the bar-shaped hole 110, touches the semi-axis plane 82 of the second limit shaft 8, and simultaneously pushes the semi-axis plane 82 through the The second limiting semi-shaft 8 rotates counterclockwise. When the second limiting semi-shaft 8 is pushed until the angle between it and the second side 112 is about 0 degrees, the roller 63 can just pass between the second half-limiting shaft 8 and the first side 111, and go over the second half-limiting shaft 8 and continue to move upwards to the top of the bar-shaped hole 110, when When the roller 63 passes over the second semi-shaft 8, since the operating handle is still inserted into the operating end of the first limiting semi-shaft 7, the semi-axis plane 74 of the first limiting semi-shaft 7 The angle between the first side 111 and the first side 111 is still about 0 degrees, and the second semi-axis 8 is quickly reset to the semi-axis plane 82 and the first side under the action of the second limiting torsion spring 71. The angle between the two sides is about 46 degrees; after the roller 63 moves to the top of the bar-shaped hole 110, it will rebound downwards. The included angle between the plane 82 and the second side 112 is about 46 degrees, and the roller 63 and the second limiting shaft 8 form a circular arc tangent state, limiting the roller 63 to continue downward movement, and then limit the inertial overshoot of the output spindle 6 within a certain range; after the second limit shaft 8 intercepts the downward movement of the roller 63, under the action of the return spring 62, the The roller 63 is pulled to the top of the strip hole 110 . Then the operating handle is pulled out from the operating end of the first limit shaft 7, and the first limit shaft 7 rotates clockwise under the action of the first limit torsion spring 71 and resets the half shaft The angle between the plane 74 and the first side 111 is about 48 degrees; during the reset process of the first limit shaft 7, the support member 75 pushes the bending part on the linkage member 81 part 810, and then rotate the second limiting shaft 8 about 23 degrees counterclockwise, and further make the included angle between the semi-axis plane 82 of the second limiting shaft 8 and the second side 112 change from 46 The temperature returned to 23 degrees.

The above-mentioned specific embodiment is only a detailed explanation of the technical solution of the present invention. The angles of the above-mentioned first limit shaft and the second limit shaft are only preferred angles, and of course other angles can also be taken; the angle is mainly based on the roller axis to the limit Shaft (the first limit axis or the second limit axis) axis line and the angle between the vertical direction depends on the size. The half-shaft structure may be a half-shaft structure passing through the axis, or a half-shaft structure not passing through the axis. Those skilled in the art should understand that the operating mechanism of the present invention can also be used in other types of three-position switches. within the scope of protection.

Claims (11)

1. An operating mechanism for a three-position switch, characterized in that: comprising The partition, the partition includes a first partition (11) and a second partition (12) arranged at intervals in parallel, and the first partition (11) and the second partition (12) pass through several pins (2) Fixed; an output spindle (6), the output spindle (6) is rotatably connected to the first partition (11) and the second partition (12), and the output spindle (6) is fixedly connected with The driving part (64), the end of the output main shaft (6) extending outside the first partition (11) is fixedly connected with the output shaft crank arm (61), and the output shaft crank arm (61) The free end is connected with a return spring (62) for returning the output spindle (6) to the isolation position; The driving mechanism controls the rotation of the output spindle (6), so that the output shaft crank arm (61) swings between the three positions of isolation, grounding, and connection. The driving mechanism includes, The operating spindle (3), the operating spindle (3) is rotatably connected to the second partition (12), and the end of the operating spindle (3) away from the first partition (11) is the operation The end is suitable for cooperation with the operating handle or the electric operating mechanism, and the end of the operating main shaft (3) close to the first partition (11) is sleeved with a first gear (30); The grounding main shaft (4) and the connecting main shaft (5), the grounding main shaft (4) and the connecting main shaft (5) can be rotatably connected to the first partition (11) and the second partition on the plate (12), and located on both sides of the operating spindle (3); the grounding spindle (4) is provided with a grounding linkage mechanism, and the connection spindle (5) is provided with a connection linkage mechanism; When the operating main shaft (3) rotates forward or reverse, the first gear (30) drives the grounding linkage mechanism or the connecting linkage mechanism to move, and the grounding linkage mechanism or connecting linkage mechanism further drives The rotating part (64) rotates to rotate the output main shaft (6) from the isolated position to the grounded or connected position; The operating mechanism also includes a limit mechanism for locking the output shaft crank arm (61) in the isolation, grounding, and closing positions; the limit mechanism includes: One end is hinged to the connecting rod (65) on the free end of the output shaft crank arm (61), and the other end of the connecting rod (65) is provided with a roller (63), A strip-shaped hole (110) matched with the roller (63), the strip-shaped hole (110) is formed on the first partition (11), and the roller (63) can move along the strip Shaped hole (110) slides; The first limiting part arranged along the length direction of the bar-shaped hole (110) is used to limit the roller (63) at the grounded or connected position, and limit the roller (63) The second limiting part is located in the isolated position. 2. An operating mechanism for a three-position switch according to claim 1, characterized in that: The grounding linkage mechanism includes a grounding cam (43) and a grounding one-way wheel that are sequentially sleeved on the grounding spindle (4) along the direction from the first partition (11) to the second partition (22). (44), the grounding gear (45), the grounding cam (43) and the grounding one-way wheel (44) are fixedly arranged on the grounding main shaft (4), and the grounding gear (45) is rotatably set Set on the grounding main shaft (4); the grounding gear (45) is limited along the axial direction of the grounding main shaft (4), and the grounding gear (45) is close to the grounding one-way wheel (44) A grounding slider (450) is hinged on the side, and a grounding notch (440) matching the grounding slider (450) is provided on the grounding one-way wheel (44), and the grounding slider (450) When the grounding gear (45) rotates along the wheel surface of the grounding one-way wheel (44); when the operating spindle (3) is rotated forward, the grounding slider (450) can slide to the grounding In the notch (440), it resists and pushes the grounding one-way wheel (44) to rotate, and then drives the grounding cam (43) to rotate, and the grounding cam (43) drives the rotating part (64) to rotate, so that The output shaft crank arm (61) rotates to the grounding position; when the operating spindle (3) is rotated in reverse, the grounding slider (450) always slides along the wheel surface of the grounding one-way wheel (44); The connection linkage mechanism includes a connection cam (53), a connection cam (53), and a connection cam (53), which are sequentially sleeved on the connection main shaft (5) along the direction from the first partition (11) to the second partition (22). The connecting one-way wheel (54) and the connecting gear (55), the connecting cam (53) and the connecting one-way wheel (54) are fixedly arranged on the connecting main shaft (5), and the connecting The connecting gear (55) is rotatably sleeved on the connecting main shaft (5) through a sleeve; the connecting gear (55) is limited along the axial direction of the connecting main shaft (5), and the connecting A connecting slider (550) is hinged on the side of the through gear (55) close to the connecting one-way wheel (54), and the connecting one-way wheel (54) is provided with the connecting slider (550) matched with the connection gap (540), the connection slider (550) rotates along the wheel surface of the connection one-way wheel (54) when the connection gear (55) rotates; When the operating main shaft (3) is rotated in the opposite direction, the connection slider (550) can slide into the connection gap (540) along the wheel surface of the connection one-way wheel (54), resisting and Push the connecting one-way wheel (54) to rotate, and then drive the connecting cam (53) to rotate, and the connecting cam (53) drives the rotating part (64) to rotate, so that the output shaft turns The arm (61) is rotated to the ON position; when the operating spindle (3) is rotated forward, the ON slider (550) always slides along the wheel surface of the ON one-way wheel (54). 3. An operating mechanism for a three-position switch according to claim 2, characterized in that: The grounding gap (440) is a groove formed by indenting from the wheel surface into its body along the rotation direction of the grounding one-way wheel (44) during grounding operation, and the grounding gap (440) includes a groove for the grounding The ground transition section (441) where the slider (450) slides, and the ground contact part (442) for the ground slider (450) to push the ground one-way wheel (44) to rotate; The connection gap (540) is a groove formed by indenting from the wheel surface into its body along the rotation direction of the connection one-way wheel (54) during the connection operation, and the connection gap (540) includes The connection transition section (541) for the connection slider (550) to slide, and the connection interference part (542) for the connection slider (550) to push the connection one-way wheel (54) to rotate ). 4. The operating mechanism for a three-position switch according to claim 3, characterized in that: the grounding slider (450) includes a grounding drive part (451) that cooperates with the grounding interference part (442) , and the tail end (452) extending away from the grounding one-way wheel (44), the hinge shaft of the grounding slider (450) is sleeved with the grounding drive part (451) to be close to the grounding The torsion spring on the wheel surface of the one-way wheel (44); the interlocking plate (60) is fixedly sleeved on the output spindle (6), and the grounding slider (450) drives the grounding one-way wheel (44) to rotate , and then drive the grounding cam (43) to drive the output spindle (6) to rotate to the grounding position; The connecting slider (550) includes a connecting drive part (551) cooperating with the connecting contact part (542), and a tail end (552) extending away from the connecting one-way wheel, the A torsion spring that drives the connecting drive part (551) to cling to the wheel surface of the connecting one-way wheel (54) is sheathed on the hinge shaft of the connecting slider (550); the connecting slider (550 ) to drive the turning on one-way wheel (54) to rotate, and then drive the turning on cam (53) to drive the output spindle (6) to turn to the turning on position; The interlocking plate (60) includes a top end (601) and a bottom (602) in a substantially fan-shaped structure; when the output spindle (6) is at the grounding position, if the operating spindle (3) continues to rotate forward , then the tail end (552) of the connecting slider (550) first touches the bottom (602) of the interlocking plate (60), so as to prevent the operation spindle (30) from continuing to rotate forward; If the operating spindle (3) is rotated in the opposite direction, the tail end (452) of the ground slider (450) first touches the top end (601) of the interlocking plate (60) to prevent the The operating spindle (3) continues to rotate in reverse; When the output spindle (6) is in the ON position, if the operation spindle (3) is reversely rotated, the tail end (452) of the ground slider (450) first interferes with the interlock The bottom (602) of the plate (60) to prevent the operation spindle (30) from continuing to rotate in reverse; if the operation spindle (3) is rotated forward, the tail end of the connecting slider (550) ( 552) first collides with the top end (601) of the interlocking plate (60), so as to prevent the operation spindle (3) from continuing to rotate forward. 5. The operating mechanism for a three-position switch according to claim 4, characterized in that: the output spindle (6) is located on the line connecting the grounding spindle (4) and the connection spindle (5) In the middle position, the driving rotating part (64) is two driving rotating plates parallel to each other and basically in the shape of an isosceles triangle, wherein the apex side of the driving rotating plate is sleeved on the output main shaft, and the driving rotating plate The grounding roller (641) and connecting roller (642) are respectively hinged on the bottom corner side of the rotating plate, the grounding roller (641) cooperates with the grounding cam (43), and the connecting roller (642 ) cooperate with the connecting cam (53). 6. An operating mechanism for a three-position switch according to claim 5, wherein a second gear (31) is rotatably sleeved on the output main shaft (6), and the second gear ( 31) Engage with the first gear (30), the grounding gear (45) and the connection gear (55) respectively, and the first gear (30) is driven by the second gear (31) engaged with it Either the ground linkage or the make linkage moves. 7. An operating mechanism for a three-position switch according to claim 6, characterized in that: The end of the grounding main shaft (4) extending out of the second partition (12) is provided with a grounding arm (41), and the connecting main shaft (5) extends out of the second partition (12) ) at the end of the plate surface is provided with a connecting arm (51), the grounding arm (41), the free end of the connecting arm (51) is respectively connected with a grounding spring (42), connecting The tension spring (52), the other end of the grounding tension spring (42) and the connection tension spring (52) are respectively hooked on the column pin (2); the operating spindle (3) drives the grounding spindle (4) or when the connecting main shaft (5) rotates, the grounding tension spring (42) or the connecting tension spring (43) is stretched first to store energy, when the grounding main shaft (4) or the When the connecting main shaft (5) rotates half a circle, the grounding tension spring (42) or the connecting tension spring (43) reaches the maximum tension, and then the grounding tension spring (42) or the connecting tension spring The spring (43) passes through and quickly releases energy, driving the grounding main shaft (4) or the connecting main shaft (5) to complete the grounding or connecting action. 8. The operating mechanism for a three-position switch according to claim 7, characterized in that: driven by the return spring (62), the roller (63) moves from the on or ground position to the The isolated position moves, and when in the isolated position, the return elastic direction of the return spring (62) is consistent with and coincides with the length direction of the strip hole (110). 9. An operating mechanism for a three-position switch according to any one of claims 1-8, characterized in that: the first limit part is a first limit shaft (7), and the first limit The bit shaft (7) is rotatably connected to the second partition (12), and extends to the strip-shaped hole (110) inside the first partition (11); the first limit The positioning shaft (7) is sleeved with a first limiting torsion spring (71) and a limiting part (72) that drive the first limiting shaft (7) to rotate in one direction; the second partition (12) The upper part is fixed with a limit pin (73) that limits the continuous rotation of the first limit shaft (7) by contacting the limit part (72); the extension of the first limit shaft (7) to the One end of the first partition (11) is a half-shaft structure. In the initial state, the distance between the half-shaft plane (74) of the half-shaft structure and the first side (111) of the strip-shaped hole (110) There is a certain angle, and the structure of the half shaft is inclined into the strip hole (110); when the roller (63) moves from the isolated position to the grounded or connected position, it squeezes the half shaft The plane (74) overcomes the torsion force of the first limiting torsion spring (71), and drives the first limiting shaft (7) to rotate to the half-axis plane (74) and the first side (111 ) are basically parallel, after the roller (63) passes over the first limiting shaft (7), the first limiting torsion spring (71) on the first limiting shaft (7) drives the first The limit shaft (7) resets to the lower end of the half shaft structure and tilts into the strip hole (110) to limit the roller (63) to the isolation position under the action of the return spring (63) sports. 10. An operating mechanism for a three-position switch according to claim 9, characterized in that: the second limit part is a second limit shaft (8), and the second limit shaft (8 ) is rotatably connected to the second partition (12), and extends to the strip hole (110) inside the first partition (11), and is located in the strip hole (110 ) on the second side (112) side; the second limit shaft (8) is sleeved with a second limit torsion spring (83) that drives the second limit shaft (8) to rotate in one direction, One end of the second limiting shaft (8) extending to the bar-shaped hole (110) is a semi-shaft structure; the connection between the second limiting shaft (8) and the first limiting shaft (7) A linkage mechanism is arranged between them, and the linkage mechanism is suitable for driving the second limit shaft (8) to rotate to the There is a certain angle between the semi-axis plane (82) of the semi-axis structure and the second side (112), and the semi-axis structure is inclined into the strip-shaped hole (110); the rolling When the child (63) moves from the grounded or connected position to the isolated position, it overcomes the second limiting torsion spring (83) by squeezing the semi-axis plane (82) of the second limiting shaft (8). ) to drive the second limiting shaft (8) to rotate until the semi-axis plane (82) is substantially parallel to the second side (112), and the roller (63) passes over the second After the limit shaft (8), the second limit torsion spring (83) on the second limit shaft (8) drives the second limit shaft (8) to reset to the half-axis structure tilted to the inside the strip hole (110) to limit the movement of said roller (63) to the grounded or connected position. 11. The operating mechanism for a three-position switch according to claim 10, characterized in that: the linkage mechanism includes a linkage member (81) fixed on the second limit shaft (8), and a support member (75) fixedly arranged on the first limiting shaft (7); the linkage member (81) is formed with a bent portion (810) extending toward the first limiting shaft (7) , the second limiting torsion spring (83) sleeved on the second limiting shaft (8) drives the bending part (810) to keep in close contact with the support (75); when rotating the When the first limit shaft (7) releases the limit to the roller (63), the semi-axis plane (82) of the second limit shaft (8) and the bar-shaped hole (110) The included angle between the second sides (112) increases; when the first limiting shaft (7) is reset to the initial position, the support member (75) is driven by pushing the bending part (810) The included angle between the semi-axis plane (82) of the second limiting shaft (8) and the second side (112) of the bar-shaped hole (110) is reduced to an initial angle.