Electromagnetic driving cam transmission switch

Abstract

The utility model provides an electromagnetic drive cam transmission switch, which relates to the technical field of electrical components, and comprises an electromagnetic drive part and a moving part, the moving part is provided with an armature part and a cam part, and the armature part is provided with a first static position located at one end of the electromagnetic drive part and a second static position located at the other end of the electromagnetic drive part. The electromagnetic force generated by the electromagnetic driving piece through current is used for driving the armature part to move between a first static position and a second static position; the cam part is provided with at least one driving surface for driving the position switch to act, and the breaking of the current of the electromagnetic driving piece is controlled by the position switch; and at least one driving surface is used for driving the breaking of the switch main loop. According to the electromagnetic driving cam transmission switch, only one electromagnetic driving piece is adopted, a clutch reversing device does not need to be matched, reciprocating driving of the moving piece can be achieved, and control logic is simpler.

Description

A switch for electromagnetically driven cam transmission Technical Field

[0001] This utility model relates to the field of changeover switch technology, specifically to an electromagnetically driven cam transmission switch. Background Technology

[0002] In power supply systems, transfer switches are critical electrical devices whose main function is to automatically switch between a primary power supply circuit and a secondary power supply circuit. Assuming no short circuit occurs between the two circuits, shorter switching times are more desirable to meet practical requirements. Taking a single-axis moving cam-driven transfer switch disclosed in Chinese patent document CN110033963A as an example, this transfer switch achieves time-division multiplexing of two sets of main contacts through a unique design of the cam's curved surface. According to its specification, the drive mechanism can be either electromagnetic or spring-powered, enabling contact switching in milliseconds, thus making it suitable for high-speed transfer switches.

[0003] For changeover switches, the simpler the structure, the fewer the auxiliary components, and the simpler the control logic, the greater the advantage, provided that safety and fast switching speed are ensured.

[0004] However, the changeover switch exists in two static states: the first circuit power is closed and the second circuit power is open, and the first circuit power is open and the second circuit power is closed. To achieve the transition between these two static states, current methods either utilize two driving mechanisms—either electromagnetic drives or electric motors—or rely on a single electromagnetic drive or electric motor, coupled with a clutch commutation device for transmission, thus achieving reciprocating motion. However, these methods undoubtedly increase the complexity of the changeover switch structure and also lead to a larger device size. Summary of the Invention

[0005] In view of this, the present invention provides an electromagnetically driven cam transmission switch to solve the problem of complex control logic in existing changeover switches that use traditional electromagnetic drive mechanisms.

[0006] This utility model provides a switch for electromagnetically driven cam transmission, comprising:

[0007] Electromagnetic drive components;

[0008] A movable component is driven by the electromagnetic drive to reciprocate. The movable component has an armature part and a cam part. The armature part has a first stationary position located at one end of the electromagnetic drive and a second stationary position located at the other end of the electromagnetic drive. The electromagnetic drive drives the armature part to move between the first stationary position and the second stationary position.

[0009] The cam portion has at least one driving surface for driving the position switch to operate. The current interruption of the electromagnetic drive is controlled by the position switch. The cam portion also has at least one driving surface for driving the main switch to open and close.

[0010] The electromagnetic drive cam transmission switch provided by this utility model uses a position switch to control the interruption of current in the electromagnetic drive component, while the cam part drives the position switch to operate, forming a closed-loop control logic. When the cam part moves to a specific position with the moving component, it drives the position switch to operate. The position switch then controls the interruption of current in the electromagnetic drive component according to its own state, realizing the coordinated operation of drive and control. During operation, the electromagnetic drive component first drives the moving component. When the moving component reaches the appropriate position, the cam part drives the position switch, and the position switch then controls the electromagnetic drive component to cut off power, ensuring that the moving component is stably maintained at that position, completing the power disconnection or connection. Compared with existing electromagnetic drive mechanisms, the electromagnetic drive cam transmission switch of this utility model uses only one electromagnetic drive component and does not require a clutch reversing device to achieve reciprocating drive of the moving component, making the control logic simpler.

[0011] Optionally, the electromagnetic drive unit generates an electromagnetic force by passing a current in the same direction, driving the armature part to reciprocate between the first stationary position and the second stationary position. This configuration greatly simplifies the drive control logic.

[0012] Optionally, the cam portion has a first driving surface and a second driving surface. The first driving surface is used to drive the first main switch to turn on and off, and the second driving surface is used to drive the second main switch to turn on and off. Different driving surfaces on the cam portion correspond to different main switches, enabling precise timing control of the on / off states of the first and second main switches. This design makes the circuit system more flexible in configuration, allowing for convenient adjustment of the on / off logic of the two main switches according to different application scenarios.

[0013] Optionally, the cam portion further includes a third driving surface for driving the position switch on and off. The addition of this third driving surface to the cam portion allows the position switch to be closely correlated with the movement of the cam portion, providing precise position feedback. When the moving member drives the cam portion to move, the third driving surface can trigger the position switch at a specific position, thereby cutting off the control current of the electromagnetic drive component.

[0014] Optionally, the first driving surface, the second driving surface, and the third driving surface are independently disposed on the cam portion. This layout makes the overall structure of the cam portion more compact and simple. The positions of each driving surface are clearly arranged, reducing complex structural design and connecting components. This not only facilitates the manufacturing and processing of the cam portion and reduces production costs, but also makes it easier to operate each driving surface and its related components during installation and maintenance.

[0015] Optionally, the electromagnetic drive unit has a first control circuit and a second control circuit for connection to a control current, respectively. A first control switch is connected in the first control circuit, and a second control switch is connected in the second control circuit. The first and second control switches are controlled by a controller. The first and second control switches can be normally open. When it is necessary to supply control current to the electromagnetic drive unit, the controller operates the first or second control switch to close it, thereby supplying control current to the electromagnetic drive unit through the first or second control circuit.

[0016] Optionally, the position switch includes a first position switch and a second position switch. The first position switch is connected in the first control circuit, and the second position switch is connected in the second control circuit. The first position switch and the second position switch are linked together, one open and one closed. With this configuration, when performing a power switching operation, if the first position switch in the first control circuit is closed, the controller will close the first control switch. In this way, the control current will flow through the first control circuit to the electromagnetic drive. After receiving the current, the electromagnetic drive will drive the armature of the moving part of the changeover switch from a first stationary position to a second stationary position. When the armature of the moving part leaves the first stationary position, the cam of the moving part will disconnect the first main power switch. When the armature of the moving part reaches the second stationary position, the cam of the moving part will close the second main power switch. During the movement of the moving part, the driving surface of its cam will cause the first position switch to open, thereby cutting off the control current and keeping the armature of the moving part in the second stationary position.

[0017] When the first position switch is open, the second position switch closes in conjunction. With this setup, when power switching occurs again, since the second position switch is now closed, the controller will close the second control switch. In this way, control current flows through the second control circuit to the electromagnetic drive unit. After receiving current, the electromagnetic drive unit drives the armature of the moving part of the changeover switch, moving it from the second rest position to the first rest position.

[0018] When the armature of the moving part leaves the second stationary position, the cam of the moving part will disconnect the second main power switch. When the armature of the moving part reaches the first stationary position, the cam of the moving part will close the first main power switch. During the movement of the moving part, the driving surface of its cam will disconnect the second position switch, thereby cutting off the control current and keeping the armature of the moving part stably in the first stationary position. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 is a front view of a specific embodiment of the electromagnetically driven cam transmission switch provided in this utility model;

[0021] Figure 2 is a schematic diagram showing the first and second driving surfaces of the moving part in Figure 1 respectively cooperating with the main switch;

[0022] Figure 3 is a front view of the armature part of the moving part in Figure 1 between the first stationary position and the second stationary position;

[0023] Figure 4 is a schematic diagram showing the first and second driving surfaces of the moving part in Figure 3 respectively cooperating with the main switch;

[0024] Figure 5 is a front view of the armature part of the moving part in Figure 1 in the second stationary position;

[0025] Figure 6 is a schematic diagram showing the first and second driving surfaces of the moving part in Figure 5 respectively cooperating with the main switch;

[0026] Figure 7 is a perspective view of a specific embodiment of the cam portion of the electromagnetically driven cam transmission switch provided in this utility model embodiment.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Electromagnetic drive component; 2. Armature part; 3. Cam part; 4. First position switch; 5. Second position switch; 6. First main switch; 7. Second main switch; 8. First driving surface; 9. Second driving surface; 10. Third driving surface; 11. First control circuit; 12. Second control circuit; 13. First control switch; 14. Second control switch. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] As shown in Figures 1 and 2, this embodiment of the electromagnetically driven cam transmission switch includes an electromagnetic drive component 1 and a moving component. The moving component is driven by the electromagnetic drive component 1 to reciprocate, and the moving component has an armature portion 2 and a cam portion 3.

[0034] The armature part 2 has a first stationary position located at one end of the electromagnetic drive member 1, as shown in FIG1, and a second stationary position located at the other end of the electromagnetic drive member 1, as shown in FIG5. That is, the electromagnetic drive member 1 drives the armature part 2 to move between the first stationary position and the second stationary position.

[0035] As shown in Figure 1, the cam portion 3 has at least one driving surface for driving the position switch. For example, when the armature portion 2 is in the first stationary position, one driving surface on the cam portion 3 drives the position switch.

[0036] As shown in Figure 1, the interruption of the current to the electromagnetic drive unit 1 is controlled by the position switch. That is, the position switch is connected to the control current loop of the electromagnetic drive unit 1, and the opening and closing of this loop is controlled by the position switch.

[0037] As shown in Figure 2, the cam portion 3 also has at least one driving surface for driving the main switch to open or close. For example, when the armature portion 2 is in the first stationary position, one driving surface on the cam portion 3 drives a main switch, thereby cutting off or closing the power supply.

[0038] The electromagnetic drive cam transmission switch provided by this utility model has an electromagnetic drive component 1 driving a moving component to move. The current interruption of the electromagnetic drive component 1 is controlled by a position switch, and the cam part 3 of the moving component in turn drives the position switch to operate, thus forming a closed-loop control logic. When the cam part 3 moves with the moving component to a specific position, it drives the position switch to operate. The position switch then controls the current interruption of the electromagnetic drive component 1 according to its own state, realizing the coordinated operation of drive and control. For example, during operation, the electromagnetic drive component 1 first drives the moving component. When the moving component reaches the appropriate position, the cam part 3 drives the position switch, and the position switch then controls the electromagnetic drive component 1 to be de-energized, ensuring that the moving component is stably maintained at that position, completing the power disconnection or connection.

[0039] It should be noted that in this embodiment, the electromagnetic drive unit 1 generates electromagnetic force by passing current in the same direction, driving the armature part 2 to reciprocate between the first stationary position and the second stationary position. This configuration greatly simplifies the drive control logic. Of course, the above description is not limiting. In some alternative embodiments, the electromagnetic drive unit 1 can also be provided with two sets of windings, and electromagnetic forces in different directions can be generated by controlling the two sets of windings to pass current in different directions, thereby driving the armature part 2 to reciprocate between the first stationary position and the second stationary position.

[0040] The electromagnetically driven cam-driven switch provided in this embodiment can be used to cut off or close a single power supply when the cam portion 3 has only one driving surface for driving the main switch. When the cam portion 3 has multiple driving surfaces for driving the main switch, it can also be used to switch multiple power supplies.

[0041] As shown in Figures 2 and 7, in this embodiment, the cam portion 3 has a first driving surface 8 and a second driving surface 9. The first driving surface 8 is used to drive the first main switch 6 to switch on and off, and the second driving surface 9 is used to drive the second main switch 7 to switch on and off. Different driving surfaces on the cam portion 3 correspond to different main switches, enabling precise timing control of the on / off states of the first main switch 6 and the second main switch 7. This design makes the circuit system more flexible in configuration, allowing for convenient adjustment of the on / off logic of the two main switches according to different application scenarios. Of course, the above description is not limiting. In some alternative embodiments, the cam portion 3 may have only one driving surface for controlling a single main switch; or, multiple driving surfaces may be provided to control a larger number of main switches.

[0042] As shown in Figures 3 and 7, in this embodiment, the cam portion 3 also has a third driving surface 10, which is used to drive the position switch on and off. The addition of the third driving surface 10 to the cam portion 3 for driving the position switch on and off allows the position switch to be closely correlated with the movement of the cam portion 3, providing precise position feedback. When the moving member drives the cam portion 3 to move, the third driving surface 10 can trigger the position switch at a specific position, thereby cutting off the control current of the electromagnetic drive member 1.

[0043] As shown in Figures 2 and 7, in some alternative embodiments, the first driving surface 8, the second driving surface 9, and the third driving surface 10 are independently disposed on the cam portion 3. Specifically, in this embodiment, the first driving surface 8 and the second driving surface 9 are respectively disposed on both sides of the cam portion 3, and the third driving surface 10 is disposed side by side with the first driving surface 8 on the same side of the cam portion 3. This layout makes the structure of the entire cam portion 3 more compact and simple. The positions of each driving surface are clearly arranged, reducing complex structural design and connecting parts. This not only facilitates the manufacturing and processing of the cam portion 3 and reduces production costs, but also makes it easier to operate each driving surface and its related components during installation and maintenance. Of course, the above description is not limiting. In some alternative embodiments, the first driving surface 8, the second driving surface 9, and the third driving surface 10 can be disposed on the same side, arranged on the left and right sides, or arranged around the moving part 360°.

[0044] As shown in Figure 1, the electromagnetic drive unit 1 has a first control circuit 11 and a second control circuit 12 for connection to the control current, respectively. A first control switch 13 is connected to the first control circuit 11, and a second control switch 14 is connected to the second control circuit 12. The first control switch 13 and the second control switch 14 are controlled by a controller. The first control switch 13 and the second control switch 14 can be normally open. When control current needs to be supplied to the electromagnetic drive unit 1, the controller operates the first control switch 13 or the second control switch 14 to close, thus supplying control current to the electromagnetic drive unit 1 through the first control circuit 11 or the second control circuit 12. Of course, the above description is not limiting. In some alternative embodiments, the first control switch 13 and the second control switch 14 can also be in a linked state of opening and closing. That is, when one control switch is closed, the other control switch is open.

[0045] As shown in Figure 1, the position switch includes a first position switch 4 and a second position switch 5. The first position switch 4 is connected in the first control circuit 11, and the second position switch 5 is connected in the second control circuit 12. The first position switch 4 and the second position switch 5 are linked together, one open and one closed. That is, when one position switch is closed, the other position switch is open.

[0046] When performing a power switching operation, referring to Figures 1 and 2, if the first position switch 4 on the first control circuit 11 is in the closed state, the controller will close the first control switch 13, and the control current will then flow through the first control circuit 11 to the electromagnetic drive unit 1. After the electromagnetic drive unit 1 is energized, it will drive the armature part 2 of the changeover switch moving part to move from the first stationary position to the second stationary position.

[0047] As shown in Figures 3 and 5, during the movement of the moving component, the third driving surface 10 of its cam portion 3 causes the first position switch 4 to open, thereby cutting off the control current. This allows the armature portion 2 of the moving component to remain in the second stationary position after moving towards it. It should be noted that because the moving component has a relatively small mass, the electromagnetic drive 1 generates sufficient force to move the armature portion 2 from the first stationary position to the second stationary position the instant it drives its armature portion 2. Therefore, even if the current to the electromagnetic drive 1 is cut off during the movement of the moving component, it will not affect the movement of the moving component.

[0048] As shown in Figure 4, when the armature part 2 of the moving part leaves the first stationary position, the cam part 3 of the moving part will disconnect the first main power switch.

[0049] Looking at Figure 6 again, when the armature part 2 of the moving part reaches the second stationary position, the cam part 3 of the moving part will close the second main power switch.

[0050] In this embodiment, when the first position switch 4 is open, the second position switch 5 will close in conjunction. Therefore, when the power switch is switched again, as shown in Figure 6, since the second position switch 5 is now closed, the controller will close the second control switch 14, and the control current will flow through the second control circuit 12 to the electromagnetic drive unit 1. After receiving the current, the electromagnetic drive unit 1 will drive the armature portion 2 of the changeover switch moving member to move from the second stationary position to the first stationary position.

[0051] When the armature part 2 of the moving part leaves the second stationary position, the cam part 3 of the moving part will disconnect the second main power switch. When the armature part 2 of the moving part reaches the first stationary position, the cam part 3 of the moving part will close the first main power switch. During the movement of the moving part, the driving surface of its cam part 3 will disconnect the second position switch 5, thereby cutting off the control current and keeping the armature part 2 of the moving part stably in the first stationary position.

[0052] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of the present invention.

Claims

1. A switch for electromagnetically driven cam transmission, characterized in that, include: An electromagnetic drive (1) and a moving part are driven by the electromagnetic drive (1) to reciprocate. The moving part has an armature part (2) and a cam part (3). The armature part (2) has a first stationary position at one end of the electromagnetic drive (1) and a second stationary position at the other end of the electromagnetic drive (1). The electromagnetic drive (1) drives the armature part (2) to move between the first stationary position and the second stationary position. The cam part (3) has at least one driving surface for driving the position switch to operate. The current interruption of the electromagnetic drive (1) is controlled by the position switch. The cam part (3) also has at least one driving surface for driving the main switch to open and close.

2. The switch for electromagnetically driven cam transmission according to claim 1, characterized in that, The electromagnetic drive unit (1) generates an electromagnetic force by passing a current in the same direction, which drives the armature part (2) to reciprocate between the first stationary position and the second stationary position.

3. The switch for electromagnetically driven cam transmission according to claim 1, characterized in that, The cam portion (3) has a first driving surface (8) and a second driving surface (9). The first driving surface (8) is used to drive the first main switch (6) to switch on and off, and the second driving surface (9) is used to drive the second main switch (7) to switch on and off.

4. The switch for electromagnetically driven cam transmission according to claim 3, characterized in that, The cam portion (3) also has a third driving surface (10), which is used to drive the position switch on and off.

5. The switch for electromagnetically driven cam transmission according to claim 4, characterized in that, The first driving surface (8), the second driving surface (9) and the third driving surface (10) are independently disposed on the cam portion (3).

6. The switch for electromagnetically driven cam transmission according to any one of claims 1-5, characterized in that, The electromagnetic drive unit (1) has a first control circuit (11) and a second control circuit (12) for connection to the control current respectively. A first control switch (13) is connected in the first control circuit (11), and a second control switch (14) is connected in the second control circuit (12). The first control switch (13) and the second control switch (14) are controlled by a controller respectively.

7. The switch for electromagnetically driven cam transmission according to claim 6, characterized in that, The position switch includes a first position switch (4) and a second position switch (5). The first position switch (4) is connected in the first control loop (11), and the second position switch (5) is connected in the second control loop (12). The first position switch (4) and the second position switch (5) are linked together in an open-closed manner.

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