CN211604959U - Double-power-supply change-over switch - Google Patents

Abstract

The utility model relates to a dual supply change over switch for switch over the operation between first power and second power, dual supply change over switch includes: a first member fixedly connected to the housing and a second member fixedly connected to the main shaft, the main shaft being rotated by rotating the operating handle in a third position range, the first member and the second member cooperating with each other to prevent simultaneous switching operations of the first power source and the second power source.

Description

Double-power-supply change-over switch

Technical Field

The utility model relates to a dual supply change over switch.

Background

Double-power Transfer Switching Equipment (TSE) is very popular in China and helps to improve the continuity of power supply. Namely: a power supply system for providing two power sources (a normal power source and a standby power source) is provided, and when the normal power source fails, the TSE is switched to the standby power source to supply power. Thus, the reliability of the TSE operation is critical to the continuity of the system power supply, while the reliability of the TSE mechanism is the basis for the reliability of the TSE operation.

The prior art TSE structure has, for example, a dual power transfer switch that operates a switching mechanism by which whether on and off of a first power source or on and off of a second power source needs to be controlled is selected. However, the operation switching mechanism may not switch in place during the switching process, so that the first power supply and the second power supply are simultaneously turned on, and two power supplies are short-circuited.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a dual supply change over switch. The dual-power transfer switch adopts the first component and the second component with guiding function or stopping function, the main shaft is switched to a proper operation position or the dual-power transfer switch is prevented from being operated at a wrong position, and the first power supply and the second power supply are prevented from being switched on simultaneously, so that the reliability of the dual-power transfer switch is improved, and the short circuit risk is reduced.

According to the utility model discloses an embodiment provides a dual power transfer switch for switch over the operation between first power and second power, dual power transfer switch includes: a housing; an operating handle pivotably mounted in the housing; a main shaft pivotably installed in the housing and drivingly connected to the operating handle, and configured to move in an axial direction between a first position and a second position, wherein, in the first position, the operating handle is rotated to rotate the main shaft, a switching operation to be turned on or off with the first power supply is performed, and the dual power supply changeover switch is kept off with the second power supply; when the main shaft is in the first position, the operation handle is rotated to drive the main shaft to rotate, the switching operation of switching on or off the first power supply is executed, and the dual-power-supply changeover switch is connected with the first power supply in a maintaining mode;

and wherein the spindle passes through a third position range while moving axially between the first position and the second position, and in the third position range, while rotating the operating handle to drive the spindle to rotate, performs switching operations to be turned on or off with the first power supply and the second power supply at the same time;

the dual power transfer switch further comprises:

a first member fixedly connected to the housing and a second member fixedly connected to the main shaft, the main shaft being rotated by rotating the operating handle in a third position range, the first member and the second member cooperating with each other to prevent simultaneous switching operations of the first power source and the second power source.

In some examples, the dual power transfer switch further includes a first driving member and a second driving member, both of which are fixedly connected to the main shaft, and the rotation of the main shaft drives the first driving member and the second driving member to rotate simultaneously,

in the first position, the first driving piece is meshed with a first movable contact driving mechanism of the dual-power transfer switch, and the first movable contact driving mechanism is actuated by rotating the operating handle to enable a first power supply to be switched on or switched off;

in the second position, the second driving piece is meshed with a second movable contact driving mechanism of the dual-power transfer switch, and the second movable contact driving mechanism is actuated by rotating the operating handle so as to enable a second power supply to be switched on or switched off.

In some examples, the first movable contact drive mechanism is rotatable relative to the main shaft and is provided with a first protrusion; the second moving contact driving mechanism can rotate relative to the main shaft and is provided with a second bulge;

the first driving piece is provided with a first idle stroke groove, the first bulge is movably connected with the first idle stroke groove when in the first position, and when the first bulge contacts one end part of the first idle stroke groove, the first driving piece actuates the first moving contact driving mechanism;

the second driving part is provided with a second idle stroke groove, the second bulge is movably connected with the second idle stroke groove when in the second position, and when the second bulge contacts one end part of the second idle stroke groove, the second driving part actuates the second moving contact driving mechanism.

In some examples, the first member includes a first guide surface; the second member includes a second guide surface; in a third range of positions, the second member rotates with the spindle until the second guide surface contacts and the first guide surface moves along the first guide surface, thereby causing the spindle to move axially to either the first position or the second position.

In some examples, the first guide surface is two mutually intersecting inclined surfaces; the second guide surface is a ball-end surface.

In some examples, a straight-line distance L between the first and second positions, a third position range R, a thickness T of the first member, and a diameter D of the ball head surface satisfy the following relationship:

R<T+D<L。

in some examples, the first guide surface is a ramp; the second guide surface is a ball-end surface.

In some examples, during rotation of the operating handle in the third range of positions, the first or second driver first travels through an idle stroke until the second guide surface contacts the first guide surface and the main shaft moves axially to the first or second position before the first or second driver actuates the first or second movable contact drive mechanism.

In some examples, the first member includes a first stop surface; the second member includes a second stop surface; in a third range of positions, the second member rotates with the spindle until the second stop surface abuts the first stop surface, thereby preventing further rotation of the operating handle and spindle.

In some examples, a linear distance L between the first and second positions, a third position range R, a length T of the first stop surface in the axial direction₁And the length T of the second stop surface in the axial direction₂The following relationship is satisfied:

R<T₁+T₂<L。

in some examples, during rotation of the operating handle within the third range of positions, the first and second drivers first travel through an idle stroke until the second stop surface abuts the first stop surface, after which the operating handle and spindle are prevented from further rotation.

In some examples, during the rotation of the operating handle in the third position range, after the first or second driving element actuates the first or second movable contact driving mechanism and before the first or second movable contact driving mechanism is powered on, the second stop surface abuts against the first stop surface, and the operating handle and the main shaft are prevented from further rotation.

The technical scheme of the utility model beneficial effect lies in: prevent that first power and second power from switching on simultaneously, consequently the utility model provides a dual power transfer switch operation safe and reliable has avoided the risk of first power and second power short circuit.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

FIG. 1 illustrates a partial perspective view of a dual power transfer switch according to an embodiment of the present disclosure;

FIG. 2 illustrates another partial perspective view of a dual power transfer switch according to an embodiment of the present disclosure;

FIG. 3A illustrates a partial perspective view of a dual power transfer switch including a first member and a second member, according to an embodiment of the present disclosure;

FIG. 3B illustrates a perspective view of a first member according to an embodiment of the present disclosure;

FIG. 3C illustrates a perspective view of a second member according to an embodiment of the present disclosure;

FIG. 4 shows a schematic diagram of a third range of positions between the first position and the second switch, in accordance with an embodiment of the present disclosure;

FIG. 5 shows a schematic view of a first position according to an embodiment of the present disclosure;

FIG. 6 shows a schematic view of a second position according to an embodiment of the present disclosure;

FIG. 7 illustrates a schematic positional diagram of components according to an embodiment of the present disclosure;

FIG. 8 illustrates a schematic top view of a first member and a second member prior to contact according to an embodiment of the disclosure;

FIG. 9 illustrates a schematic top view of a first member and a second member after contact according to an embodiment of the disclosure;

FIG. 10A illustrates a partial perspective view of a dual power transfer switch including a first member and a second member according to yet another embodiment of the present disclosure;

FIG. 10B shows a perspective view of a first member according to yet another embodiment of the present disclosure;

FIG. 10C illustrates a perspective view of a second member according to yet another embodiment of the present disclosure;

FIG. 11 shows a schematic positional diagram of components according to yet another embodiment of the present disclosure;

FIG. 12 illustrates a schematic position of a first member and a second member before contact according to yet another embodiment of the present disclosure;

FIG. 13 shows a schematic position diagram of a first member and a second member after contact according to yet another embodiment of the present disclosure;

FIG. 14 illustrates a schematic position of a first member after contact with a second member according to yet another embodiment of the present disclosure.

List of reference numerals

1 operating handle

2 spindle

3, 3' first structural member

31 first guide surface

32 first stop surface

4, 4' second member

41 second guide surface

42 second stop surface

5 first driving member

51 first idle stroke groove

6 second driving member

61 second idle stroke groove

7 first moving contact driving mechanism

71 first projection

8 second moving contact driving mechanism

81 second projection

9 first push button

10 second push button

11 connecting piece

12 spring device

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure will be described in detail and completely with reference to the accompanying drawings of specific embodiments of the present disclosure. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The dual power transfer switch according to the present disclosure is specifically described below with reference to the drawings.

FIG. 1 illustrates a partial perspective view of a dual power transfer switch according to an embodiment of the present disclosure; FIG. 2 illustrates another partial perspective view of a dual power transfer switch according to an embodiment of the present disclosure; FIG. 3A illustrates a partial perspective view of a dual power transfer switch including a first member and a second member, according to an embodiment of the present disclosure; FIG. 3B illustrates a perspective view of a first member according to an embodiment of the present disclosure; FIG. 3C illustrates a perspective view of a second member according to an embodiment of the present disclosure; FIG. 4 shows a schematic diagram of a third range of positions between the first position and the second switch, in accordance with an embodiment of the present disclosure; FIG. 5 shows a schematic view of a first position according to an embodiment of the present disclosure; fig. 6 shows a schematic view of a second position according to an embodiment of the present disclosure.

According to the dual power transfer switch of the embodiment of the present disclosure, for performing a switching operation between a first power source and a second power source, the dual power transfer switch includes:

a housing;

an operating handle 1 pivotably mounted in the housing;

a main shaft 2 pivotably installed in the housing and drivingly connected to the operation handle 1, and the main shaft 2 configured to move in an axial direction between a first position and a second position, wherein, in the first position, the operation handle 1 is rotated to rotate the main shaft 2, a switching operation of turning on or off the first power supply is performed, and the dual power transfer switch is kept off the second power supply; when the main shaft 2 is rotated, the operation handle 1 is rotated to perform a switching operation to be switched on or off with the second power supply, and the dual power supply changeover switch is kept off with the first power supply.

And, the main shaft 2 passes through a third position range when moving in the axial direction between the first position and the second position, and in this third position range, when the operation handle 1 is rotated to drive the main shaft 2 to rotate, a switching operation of turning on or off the first power supply and the second power supply is performed at the same time.

In this embodiment, the dual power transfer switch further includes: a first member 3, 3 'fixedly connected to the housing and a second member 3, 3' fixedly connected to the main shaft 2, in a third range of positions, the rotary operating handle 1 thereby bringing about rotation of the main shaft 2, the first member 3, 3 'and the second member 3, 3' cooperating with each other to prevent simultaneous switching operations with the first power supply and the second power supply being switched on or off.

For example, the main shaft 2 may be moved in the arrow direction (i.e., axial direction) shown in fig. 1. The movement of the main shaft 2 can be realized by a switching mechanism as shown in fig. 2, for example. The switching mechanism shown in fig. 2 comprises a first push button 9 and a second push button 10, the first push button 9 and the second push button 10 being interconnected by a link 11, the link 11 being pivotable about a point between the first push button 9 and the second push button 10, one end of the link 11 being provided with spring means 12. The end of the link 11 connected to the first button 9 is connected to one end of the main shaft 2, and the main shaft 2 can move up and down along with the pivoting of the link 11. When the first button 9 is pressed, the main shaft 2 moves axially downwards to a first position; when the second button 10 is pressed, the spindle 2 is moved axially upwards to a second position.

As shown in fig. 3A to 3C, the first member 3 includes the first guide surface 31, the second member 4 includes the second guide surface 41, and in the third position range, the second member 4 rotates with the spindle 2 (e.g., rotates in a counterclockwise direction as shown by an arrow in the drawing) until the second guide surface 41 contacts and the first guide surface 31 moves along the first guide surface 31, thereby causing the spindle 2 to move in the axial direction to the first position or the second position.

In the present embodiment, the first guide surface 31 is two inclined surfaces intersecting with each other, and the second guide surface 41 is a ball head surface, as shown in fig. 3B.

Further, the dual power transfer switch may further include a first driving member 5 and a second driving member 6, both the first driving member 5 and the second driving member 6 are fixedly connected to the main shaft 2, and the rotation of the main shaft 2 may drive the first driving member 5 and the second driving member 6 to rotate simultaneously.

For example, the second member 4 may be disposed between the first driver 5 and the second driver 6, as shown in fig. 1 and 3A. The disclosed embodiment is not limited thereto, and the second member 4 may also be fixedly disposed at other positions of the main shaft 2, such as above the first driving member 5 or below the second driving member 6. Similarly, the first member 3 is disposed at a position corresponding to the second member 4.

In the first position, the first driving member 5 is engaged with the first movable contact driving mechanism 7 of the dual power transfer switch, and at this time, the first movable contact driving mechanism 7 is actuated by rotating the operating handle 1 to turn on or off the first power supply.

In the second position, the second driving member 6 is engaged with the second movable contact driving mechanism 8 of the dual power transfer switch, and at this time, the second movable contact driving mechanism 8 is actuated by rotating the operating handle 1 to turn on or off the second power supply.

In the present embodiment, the first movable contact driving mechanism 7 is rotatable with respect to the main shaft 2 and is provided with a first protrusion 71, and the second movable contact driving mechanism 8 is rotatable with respect to the main shaft 2 and is provided with a second protrusion 81.

The first driving member 5 is provided with a first idle stroke slot 51, the first protrusion 71 is movably connected with the first idle stroke slot 51 when in the first position, and when the first protrusion 71 contacts one end of the first idle stroke slot 51, the first driving member 5 actuates the first movable contact driving mechanism 7. The second driving member 6 is provided with a second idle stroke slot 61, the second protrusion 81 is movably connected with the second idle stroke slot 61 in the second position, and when the second protrusion 81 contacts one end of the second idle stroke slot 61, the second driving member 6 actuates the second movable contact driving mechanism 8.

Fig. 4 shows a third range of positions between the first position and the second switch. In the third position, the first protrusion 71 is movably connected to the first idle stroke groove 51, and the second protrusion 81 is movably connected to the second idle stroke groove 61. The operating handle 1 is now rotated, bringing the spindle 2 into rotation, and the second member 4 rotates with the spindle 2 until the second guide surface 41 of the second member 4 contacts the first guide surface 31 of the first member 3. In the present embodiment, the first guide surface 31 is two mutually intersecting inclined surfaces, i.e., an upper inclined surface and a lower inclined surface, and the second guide surface 41 is a ball head surface.

At this point the following two situations may occur:

the first condition is as follows: when the central portion of the second guide surface 41 contacts the lower slope, the second guide surface 41 moves along the lower slope and is finally guided to the lower surface of the first member 3, at which time the spindle 2 moves from the third position range to the first position along the arrow (axially downward) shown in fig. 5.

Case two: when the central portion of the second guide surface 41 contacts the upper slope, the second guide surface 41 moves along the upper slope and is finally guided to the upper surface of the first member 3, at which time the spindle 2 moves from the third position range to the second position along the arrow (axially upward) shown in fig. 6.

The dimensioning of the components according to an embodiment of the disclosure will be described below in connection with fig. 7.

The left line of fig. 7 shows the straight distance L between the first position and the second position, the middle line shows the third position range R, and the right line shows the thickness T between the upper and lower surfaces of the first member 3 and the diameter D of the second guide surface 41 (ball-end surface). If in the case of the first instance the ball-end surface is guided to the lower surface of the first member 3, the ball-end surface is moved downwards a distance 1/2D, the distance by which the spindle is moved downwards should then be between the third position range and the first position, where the switching mechanism can be pushed to the first position due to the spring force of the spring means. Therefore, the following relationship should be satisfied at this time:

that is to say that the first and second electrodes,

R<T+D<L。

similarly, in case two, the reverse is true.

For example, in one example, L is 5.4mm, R is 1.22mm, and in this case, T may be 1mm, and D may be 2mm, so that the requirement of the above formula may be satisfied.

Alternatively, the first guide surface 31 is a ramp and the second guide surface 41 is a ball-end surface. At this time, no matter which position of the third position range the second member 4 is located, the second member 4 will be guided to a specific position along the slope of the first guide surface 31, and the spindle 2 will move to the first position or the second position accordingly.

FIG. 8 illustrates a schematic top view of a first member and a second member prior to contact according to an embodiment of the disclosure; FIG. 9 illustrates a schematic top view of a first component and a second component after contact, according to an embodiment of the disclosure.

Alternatively, during the rotation of the operating handle 1 in the third position range, the first driving member 5 or the second driving member 6 first travels through an idle stroke until the second guide surface 41 contacts the first guide surface 31 and the main shaft 2 moves axially to the first position or the second position, after which the first driving member 5 or the second driving member 6 does not actuate the first movable contact driving mechanism 7 or the second movable contact driving mechanism 8.

In the third position range shown in fig. 8, by rotating the operating handle 1 in the direction of the arrow shown in fig. 8, the first driving member 5 first travels through an idle stroke, i.e., the first projection 71 is not in contact with the end of the first idle stroke groove 51, at which time the first member 3 and the second member 4 are not yet in contact. The operating handle 1 is further rotated, and the first driving member 5 continues to rotate synchronously until the second guiding surface 41 of the second member 4 contacts the first guiding surface 31 of the first member 3, and the main shaft 2 moves axially to the first position, and then the first protrusion 71 contacts the end of the first idle stroke slot 51, and at this time, the first driving member 5 starts to actuate the first movable contact driving mechanism 7, as shown in fig. 9.

Similarly, during the rotation of the operating handle 1 in the third position range, the second driving member 6 firstly travels through an idle stroke until the second guiding surface 41 of the second member 4 contacts the first guiding surface 31 of the first member 3, and the main shaft 2 moves to the second position in the second direction, and then the second driving member 6 does not actuate the second movable contact driving mechanism 8. Since the motion principle is similar to that of the first case, the detailed description is omitted.

FIG. 10A illustrates a partial perspective view of a dual power transfer switch including a first member and a second member according to yet another embodiment of the present disclosure; FIG. 10B shows a perspective view of a first member according to yet another embodiment of the present disclosure; fig. 10C illustrates a perspective view of a second member according to yet another embodiment of the present disclosure.

The following description is focused only on differences of the dual power transfer switch according to still another embodiment of the present disclosure from the above-described embodiment, and the description of the same or corresponding parts will be omitted.

In the present embodiment, as shown in fig. 10A to 10C, the first member 3 'includes the first stop surface 32, and the second member 4' includes the second stop surface 42. In the third range of positions, the second member 4' rotates with the spindle 2 until the second stop surface 42 abuts the first stop surface 32, thereby preventing further rotation of the operating handle 1 and the spindle 2.

Optionally, in the third range of positions, the second side surface 12 of the second member 10 abuts the first side surface 11 of the first member 9, thereby preventing further rotation of the operating handle 1.

Unlike the previous embodiments, the mutual cooperation between the first member 3 'and the second member 4' in the present embodiment is not that the two members are guided to each other to the correct switch operation position, but that they are stopped from each other at the wrong switch operation position, thereby preventing the first power supply and the second power supply from being turned on simultaneously at such wrong position.

FIG. 11 shows a schematic positional diagram of components according to yet another embodiment of the present disclosure;

the left line of fig. 11 shows the linear distance L between the first position and the second position, the middle line shows the third position range R, and the right line shows the length T of the first stop surface 32 in the axial direction₁And the length T of the second stop surface 42 in the axial direction₂As can be seen from the figure, in order to satisfy the stop operation performed in the third position range R, the above-described dimensions need to satisfy the following relationship:

R<T₁+T₂<L。

for example, in one example, where L is 5.4mm and R is 1.22mm, T may be set₁＝2mm，T₂2mm, the requirement of the above formula can be satisfied.

FIG. 12 illustrates a schematic position of a first member and a second member before contact according to yet another embodiment of the present disclosure; FIG. 13 shows a schematic position diagram of a first member and a second member after contact according to yet another embodiment of the present disclosure; FIG. 14 illustrates a schematic position of a first member after contact with a second member according to yet another embodiment of the present disclosure.

As shown in fig. 12 and 13, in an exemplary embodiment, during rotation of the operating handle 1 in the third position range, the first and second driving members 5, 6 first travel through an idle stroke, i.e., the first projection 71 is not in contact with the end of the first idle stroke slot 51, while the first and second members 3 ', 4' are not yet in contact. Continuing to rotate the operating handle 1, the first drive member 5 continues to rotate synchronously until the second stop surface 42 abuts the first stop surface 32, after which the operating handle 1 and spindle 2 are prevented from further rotation, thereby preventing the first and second power sources from being turned on simultaneously.

Similarly, during rotation of the operating handle 1 in the third position range, the second drive member 6 first travels through an idle stroke until the second stop surface 42 abuts the first stop surface 32, after which the operating handle 1 and the spindle 2 are prevented from further rotation.

In still another exemplary embodiment, as shown in fig. 12 and 14, during the rotation of the operating handle 1 in the third position range, after the first driving member 5 or the second driving member 6 actuates the first movable contact driving mechanism 7 or the second movable contact driving mechanism 8 and before the first movable contact driving mechanism 7 or the second movable contact driving mechanism 8 switches on the first power supply, the second stop surface 42 abuts against the first stop surface 32, and the operating handle 1 and the main shaft 2 are prevented from further rotation. The sequence of movement of this embodiment is different from the previous embodiment, but both can achieve prevention of further rotation of the operating handle 1 and the main shaft 2 at the wrong position (third position range), thereby avoiding simultaneous turning on of the first power supply and the second power supply.

To sum up, the embodiment of the utility model provides a dual power transfer switch, this dual power transfer switch have the first component and the second component of direction function or backstop function, switch over the main shaft to suitable operating position or in order to stop at wrong position operation dual power transfer switch, prevent that first power and second power from switching on simultaneously to improve dual power transfer switch's reliability, avoided first power and second power to switch on the risk that arouses the short circuit.

The above description is only for the specific embodiments of the present disclosure, but the scope of the embodiments of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes, substitutions or combinations within the technical scope of the embodiments of the present disclosure or under the concept of the embodiments of the present disclosure, and all of them should be covered by the scope of the embodiments of the present disclosure.

Claims (12)

1. A dual power transfer switch for switching operation between a first power source and a second power source, the dual power transfer switch comprising:

a housing;

an operating handle (1) pivotably mounted in the housing;

a main shaft (2) which is pivotally installed in the housing and is in transmission connection with the operating handle (1), and the main shaft (2) is configured to move in the axial direction between a first position and a second position, wherein, in the first position, the operating handle (1) is rotated to drive the main shaft (2) to rotate, a switching operation of switching on or off with a first power supply is performed, and the dual power supply changeover switch is kept off with a second power supply; when the double-power-supply changeover switch is at the second position, the operation handle (1) is rotated to drive the main shaft (2) to rotate, the switch operation of switching on or off the second power supply is executed, and the double-power-supply changeover switch is kept off from the first power supply;

and wherein, the main shaft (2) passes through the third position range when moving axially between the first position and the second position, in this third position range, while rotating the operating handle (1) to drive the main shaft (2) to rotate, carry out the on-off switch operation with the first power and second power at the same time;

characterized in that, dual power transfer switch still includes:

a first member (3, 3 ') fixedly connected to the housing and a second member (4, 4') fixedly connected to the main shaft (2), in a third range of positions, the rotary operating handle (1) in turn rotates the main shaft (2), the first member (3, 3 ') and the second member (4, 4') cooperating with each other to prevent simultaneous switching operations with the first power supply and the second power supply being switched on or off.

2. The dual power transfer switch of claim 1, further comprising a first driving member (5) and a second driving member (6), wherein the first driving member (5) and the second driving member (6) are both fixedly connected to the main shaft (2), and the rotation of the main shaft (2) drives the first driving member (5) and the second driving member (6) to rotate simultaneously,

in a first position, the first driving piece (5) is meshed with a first movable contact driving mechanism (7) of the dual-power transfer switch, and the first movable contact driving mechanism (7) is actuated by rotating the operating handle (1) to switch on or off a first power supply;

in the second position, the second driving piece (6) is meshed with a second movable contact driving mechanism (8) of the dual-power transfer switch, and the second movable contact driving mechanism (8) is actuated by rotating the operating handle (1) so as to switch on or off a second power supply.

3. The dual power transfer switch of claim 2,

the first moving contact driving mechanism (7) can rotate relative to the main shaft (2) and is provided with a first bulge (71);

the second moving contact driving mechanism (8) can rotate relative to the main shaft (2) and is provided with a second bulge (81);

the first driving piece (5) is provided with a first idle stroke groove (51), the first protrusion (71) is movably connected with the first idle stroke groove (51) in the first position, and when the first protrusion (71) contacts one end of the first idle stroke groove (51), the first driving piece (5) actuates the first movable contact driving mechanism (7);

the second driving piece (6) is provided with a second idle stroke groove (61), the second protrusion (81) is movably connected with the second idle stroke groove (61) in the second position, and when the second protrusion (81) contacts one end of the second idle stroke groove (61), the second driving piece (6) actuates the second moving contact driving mechanism (8).

4. The dual power transfer switch of claim 3,

the first member (3) comprises a first guide surface (31);

the second member (4) comprises a second guide surface (41);

wherein in a third range of positions the second member (4) rotates with the spindle (2) until the second guide surface (41) contacts and the first guide surface (31) moves along the first guide surface (31) such that the spindle (2) moves axially to the first or second position.

5. The dual power transfer switch of claim 4,

the first guide surface (31) is two mutually intersecting inclined surfaces;

the second guide surface (41) is a ball head surface.

6. The dual power transfer switch of claim 5, wherein a linear distance L between the first and second positions, a third position range R, a thickness T of the first member (3), and a diameter D of the ball-shaped surface satisfy the following relationship:

R<T+D<L。

7. the dual power transfer switch of claim 4,

said first guide surface (31) is an inclined surface;

the second guide surface (41) is a ball head surface.

8. The dual power transfer switch of any one of claims 4-7, wherein during rotation of the operating handle (1) within the third range of positions, the first drive member (5) or the second drive member (6) first travels through an idle stroke until the second guide surface (41) contacts the first guide surface (31) and the main shaft (2) moves axially to the first position or the second position, after which the first drive member (5) or the second drive member (6) does not actuate the first movable contact drive mechanism (7) or the second movable contact drive mechanism (8).

9. The dual power transfer switch of claim 3,

the first member (3') comprises a first stop surface (32);

the second member (4') comprises a second stop surface (42);

wherein in a third range of positions the second member (4') rotates with the spindle (2) until the second stop surface (42) abuts the first stop surface (32), thereby preventing further rotation of the operating handle (1) and spindle (2).

10. The dual power transfer switch of claim 9,

a linear distance L between the first and second positions, a third position range R, a length T of the first stop surface (32) in the axial direction₁And the axial length T of the second stop surface (42)₂The following relationship is satisfied:

R<T₁+T₂<L。

11. the dual power transfer switch of claim 9 or 10, wherein during rotation of the operating handle (1) in the third range of positions the first (5) and second (6) driving member first travel through an idle stroke until the second stop surface (42) abuts the first stop surface (32), after which the operating handle (1) and spindle (2) are prevented from further rotation.

12. The dual power transfer switch of claim 11, wherein during rotation of the operating handle (1) within the third position range, after the first driving member (5) or the second driving member (6) actuates the first movable contact driving mechanism (7) or the second movable contact driving mechanism (8) and before the first movable contact driving mechanism (7) or the second movable contact driving mechanism (8) is powered on, the second stop surface (42) abuts against the first stop surface (32), and the operating handle (1) and the main shaft (2) are prevented from further rotation.

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