Transmission structure of switch

Abstract

A transmission structure of a switch belongs to the technical field of low-voltage apparatuses. Comprising a rotating disc and a transmission plate, the transmission plate is matched with the rotating disc and driven by rotation of the rotating disc to rotate, a driving shaft is arranged on the rotating disc, an opening-shaped matching groove is formed in the end, facing the rotating disc, of the transmission plate, and the groove wall of the matching groove comprises a first inner wall and a second inner wall which correspond to each other; a switching-on transmission surface is formed on the first inner wall, the driving shaft pushes and presses the switching-on transmission surface when the rotating disc rotates, so that the transmission plate acts on the switch to switch on the switch, and a first distance L1 between a rotating center O1 of the rotating disc and a normal Y on the switching-on transmission surface is smaller than a second distance L2 between a rotating center O2 of the transmission plate and the normal Y on the switching-on transmission surface. The operating mechanism has the advantages that the requirement on output force required by an electromagnetic system is reduced, so that the impact force borne by the operating mechanism is reduced, the reliability of the operating mechanism is improved, and the overall service life is guaranteed; the whole structure is simple, and good economical efficiency is embodied.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and in particular relates to a transmission structure of a switch. Background Art

[0002] As the industry knows, many specialized applications, such as airports, fire stations, hospitals, banks, docks, elevators, surveillance systems, high-rise buildings, communications facilities, and even military facilities, require continuous power supply to ensure uninterrupted operation and safety. However, in actual power usage, power failures, such as those in the primary power supply, or unexpected power outages inevitably necessitate the use of a dual power transfer switch to promptly switch to another power source, such as a backup power source.

[0003] Prior art dual power transfer switches generally utilize an electromagnetic system as their power source. Specifically, during the power transfer process from one power source, such as the primary power source (external power supply), to another power source, such as the backup power source (self-generated power), the characteristics of the magnetic system are utilized to drive the switch. The magnetic system includes, but is not limited to, electromagnetic blocks, permanent magnets, or other magnetic elements. Its mechanism of action is to achieve fast and reliable switching through magnetic force. During the power transfer process using the electromagnetic system as the power source, a transmission mechanism consisting of a rotary disk and a rotating transmission plate drives the circuit breaker, which acts as the actuator switch, including closing, opening, and re-closing.

[0004] As is well known in the industry, the operating forces required for the aforementioned circuit breakers, which act as actuators, vary. Consequently, increasing the electromagnetic system's output force is often a necessary measure to adapt to different actuators. This has the disadvantage of increasing the electromagnetic system's force requirements and exposing the entire operating mechanism to excessive impact forces, reducing its reliability. Given this situation, further exploration and improvement are necessary, and the technical solutions described below were developed in this context. Utility Model Content

[0005] The task of the utility model is to provide a transmission structure of a switch which can reduce the output force requirement of the electromagnetic system, reduce the impact force on the operating mechanism and thus improve its reliability, and help to ensure the overall service life and embody the effect of simple structure.

[0006] The task of the utility model is accomplished in this way. A transmission structure of a switch includes a turntable and a transmission plate, the transmission plate cooperates with the turntable and is driven to rotate by the rotation of the turntable, a driving shaft is provided on the turntable, and an open-shaped matching groove is formed at one end of the transmission plate facing the turntable, the groove wall of the matching groove includes a first inner wall and a second inner wall corresponding to each other, and a closing transmission surface is formed on the first inner wall. When the turntable rotates, the driving shaft pushes the closing transmission surface to make the transmission plate act on the switch to close the switch, and the first distance between the rotation center of the turntable and the normal on the closing transmission surface is smaller than the second distance between the rotation center of the transmission plate and the normal on the closing transmission surface.

[0007] In the present invention, the matching groove extends toward the rotation center of the transmission plate, and a first angle is formed between the closing transmission surface and the depth direction of the matching groove.

[0008] In the present invention, the first angle is 35-45°.

[0009] In the present utility model, a tripping transmission surface is formed on the second inner wall. When the turntable rotates, the drive shaft pushes the tripping transmission surface to cause the transmission plate to act on the switch to trip the switch. The third distance between the rotation center of the turntable and the normal to the tripping transmission surface is smaller than the fourth distance between the rotation center of the transmission plate and the normal to the tripping transmission surface.

[0010] In the present invention, a second angle is formed between the opening transmission surface and the depth direction X of the matching groove.

[0011] In the present invention, the second angle is 5-15°.

[0012] In the present invention, a limiting surface connected with the closing transmission surface is formed on the first inner wall, and an inflection point recessed with the first inner wall as a carrier is formed between the closing transmission surface and the limiting surface; a guide surface connected with the opening transmission surface is formed on the second inner wall, and a guide surface inflection point protruding toward the direction of the matching groove is formed between the opening transmission surface and the guide surface. Before the switch is closed, the rotation of the turntable drives the drive shaft to act on the guide surface. As the turntable rotates, the drive shaft continues to act on the guide surface until the guide surface inflection point is formed between the opening transmission surface and the guide surface, so that the switch is buckled again.

[0013] In the present invention, the end of the transmission plate facing the turntable is constituted as the turntable mating end, and the end of the transmission plate facing the switch is constituted as the switch mating end. The rotation center of the transmission plate is located between the turntable mating end and the switch mating end, and the mating groove is opened on the turntable mating end.

[0014] In the utility model, a drive groove extending toward the rotation center of the transmission plate is provided on the mating end of the switch. The inner walls of the drive groove facing each other on both sides of the switch handle of the switch are mirror-arranged in the depth direction of the drive groove, and constitute a drive end and an avoidance area.

[0015] The technical solution provided by the utility model makes reasonable improvements to the matching structure of the turntable and the transmission plate. Therefore, there is no need to increase the output force of the electromagnetic system to adapt to and meet the required operating force requirements as in the existing technology, thereby reducing the output force requirements of the electromagnetic system, thereby reducing the impact force on the operating mechanism, improving the reliability of the operating mechanism, and ensuring the overall service life; due to the simple overall structure, it can reflect good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of an embodiment in which the transmission structure of the switch of the utility model is applied to a switch;

[0017] Figure 2 for Figure 1 The transmission structure diagram of the switch shown;

[0018] Figure 3 for Figure 1 and Figure 2 A top view of the turntable is shown;

[0019] Figure 4 for Figure 1 and Figure 2 The structural diagram of the transmission plate shown;

[0020] Figure 5 This is a schematic diagram of how the turntable drives the transmission plate through the drive shaft to close the switch;

[0021] Figure 6 This is a schematic diagram of the turntable 1 driving the transmission plate through the drive shaft to open the switch;

[0022] Figure 7 FIG. 2 is another embodiment of the transmission plate of the present invention. DETAILED DESCRIPTION

[0023] See Figures 1 to 4 First of all, the applicant needs to explain that the switch involved in the utility model can be a switch device that uses an electromagnetic system as a power source and drives the circuit breaker to open, close, and re-close through the transmission structure described in the utility model; it can also be a dual power automatic transfer switch. The following embodiment gives a dual power automatic transfer switch as an example to describe the transmission structure of the switch of the utility model.

[0024] Depend on Figure 1As shown, the dual power automatic transfer switch includes a base plate 7, a pedestal 6, an actuator switch 5, and an operating mechanism. The operating mechanism is mounted on the base plate 7. The actuator switches 5 are located on either side of the operating mechanism and mounted on the pedestal 6, which is mounted on the base plate 7. The first actuator switch on the left (a circuit breaker in this embodiment) controls the connection and disconnection of the first power source, while the second actuator switch on the right (a circuit breaker in this embodiment) controls the connection and disconnection of the second power source.

[0025] The operating mechanism comprises an electromagnetic drive mechanism 3 (an electromagnetic system that forms the power source), a bracket 4, and a transmission structure. The transmission structure comprises a turntable 1 rotatably mounted on the bracket 4 and a pair of transmission plates 2 positioned on either side of the turntable 1. Each of the two transmission plates 2 is rotatably mounted on the bracket 4, with one end engaging the turntable 1 and the other end engaging the handle 51 of the actuator switch 5. Rotation of the turntable 1 drives the transmission plates 2, which in turn drives the handle 51, thereby opening, closing, and re-engaging the switch 5.

[0026] The transmission plate 2 cooperates with the turntable 1 and is driven to rotate by the turntable 1 in a specific manner: a drive shaft 11 is provided on the turntable 1, and an open-shaped matching groove 21 is formed at one end of the transmission plate 2 facing the turntable 1. The drive shaft 11 of the turntable 1 is inserted into the matching groove 21 and drives the drive shaft 11 during the counterclockwise or clockwise rotation of the turntable 1. The drive shaft 11 pushes the groove wall of the matching groove 21, causing the transmission plate 2 to act on the handle 51 of the execution switch 5 and close the execution switch 5 ( Figure 5 Status shown) or open ( Figure 6 status shown).

[0027] The groove wall of the aforementioned matching groove 21 includes a groove bottom wall 22 ( Figure 4 Marked) and a first inner wall 201 and a second inner wall 202 ( Figure 5 Marked), the aforementioned turntable 1 drives the driving shaft 11 to push the aforementioned first inner wall 201 or the aforementioned second inner wall 202, so that the aforementioned transmission plate 2 acts on the aforementioned switch and causes the execution switch 5 to close or open.

[0028] The technical features of the present utility model are as follows: a closing transmission surface 23 is formed on the first inner wall 201, and when the turntable 1 rotates, the driving shaft 11 pushes the closing transmission surface 23, causing the transmission plate 2 to act on the switch to close the switch, and a first distance L1 between the rotation center O1 of the turntable 1 and the normal Y on the closing transmission surface 23 is smaller than a second distance L2 between the rotation center O2 of the transmission plate 2 and the normal Y on the closing transmission surface 23.

[0029] The closing transmission surface 23 is formed by deflecting on the first inner wall 201. In the preferred embodiment given, see Figure 4 The mating groove 21 as a whole extends toward the rotation center O2 of the transmission plate 2, and one end of the first inner wall 201 close to the rotation center O2 of the transmission plate 2 is bent at a first angle α with the depth direction X of the mating groove 21 to form a closing transmission surface 23.

[0030] Furthermore, a tripping transmission surface 24 is formed on the second inner wall 202. When the turntable 1 rotates, the drive shaft 11 pushes the tripping transmission surface 24, causing the transmission plate 2 to act on the switch to trip the switch. The third distance L3 between the rotation center O1 of the turntable 1 and the normal Z on the tripping transmission surface 24 is smaller than the fourth distance L4 between the rotation center O2 of the transmission plate 2 and the normal Z on the tripping transmission surface 24.

[0031] The opening transmission surface 24 is formed by bending the second inner wall 202 , and the end of the second inner wall 202 close to the rotation center O2 of the transmission plate 2 is bent at a second angle β with the depth direction X of the matching groove 21 to form the aforementioned opening transmission surface 24 .

[0032] One end of the aforementioned closing transmission surface 23 is connected (also called "connected") to one end of the groove bottom wall 22 ( Figure 4 ), and one end of the aforementioned opening transmission surface 24 is connected to the other end of the groove bottom wall 22 ( Figure 4 ), it can be said that the groove bottom wall 22 is connected to the first inner wall 201 and the second inner wall 202 at one end close to the rotation center O2 of the transmission plate 2, Figure 4 , the transmission plate 2 is placed horizontally, and Figure 4 In the embodiment given, the groove bottom wall 22 extends substantially vertically, and therefore, the depth direction X of the matching groove 21 is also the normal direction of the groove bottom wall 22. Of course, the groove bottom wall 22 is not limited to the vertical extension structure given in the embodiment, and can also be extended in a direction offset from the vertical direction. In this case, the normal direction of the groove bottom wall 22 is different from the overall depth direction X of the matching groove 21. The matching groove 21 extends substantially toward the rotation center O2 of the transmission plate 2, and its extension state is not limited to Figure 4If the horizontal X direction is given in the figure, then the reference line for the first angle α and the second angle β is not limited to the depth direction X of the matching groove 21, the horizontal X direction, or the normal direction on the groove bottom wall 22. It should be understood that, in essence, the closing transmission surface 23 described in the present invention is formed by tilting and deflecting toward the second inner wall 202 at the end of the first inner wall 201 near the rotation center O2 of the transmission plate 2. This allows the drive shaft 11 to push the closing transmission surface 23, causing the transmission plate 2 to act on the switch to close the switch. Specifically, when the transmission plate 2 pushes the handle 51 of the switch 5 past the critical closing position of the switch (once the handle 51 passes this critical closing position, the switch will automatically close under the action of the spring of its internal operating mechanism, causing the handle 51 to reach the closed position), the first distance L1 between the rotation center O1 of the turntable 1 and the normal line Y on the closing transmission surface 23 is less than the second distance L2 between the rotation center O2 of the transmission plate 2 and the normal line Y on the closing transmission surface 23. Similarly, the opening transmission surface 24 is formed by tilting and deflecting toward the first inner wall 201 at one end of the second inner wall 202 close to the rotation center O2 of the transmission plate 2. Due to the setting of the first angle α and the second angle β, or in other words, due to the deflection state of the closing transmission surface 23 and the opening transmission surface 24, Figure 4 It is obvious that in the depth direction X (i.e., the extension direction) of the matching groove 21, the closer to the rotation center O2 of the transmission plate 2, the smaller the distance between the closing transmission surface 23 and the opening transmission surface 24.

[0033] The degree of the aforementioned first angle α is different from the degree of the aforementioned second angle β. Specifically, the degree of the aforementioned first angle α is greater than the degree of the aforementioned second angle β. Specifically, the degree of the aforementioned first angle α is preferably 35-45°, preferably 38-42°, and the degree of the aforementioned second angle β is preferably 5-15°, preferably 8-12°.

[0034] It should be understood that the angle sizes of the aforementioned first angle α and the second angle β are not absolutely limited to the given degrees, i.e., the parameter range, because the opening, closing, and re-locking of the handle 51 of the executive switch 5 play a decisive role in the size relationship between the first angle α and the second angle β. In other words, the relationship between the first angle α and the second angle β can be adjusted according to the characteristics of the executive switch 5 itself.

[0035] Depend on Figure 4As shown, a limit surface 27 connected with the aforementioned closing transmission surface 23 is formed on the aforementioned first inner wall 201, and an inflection point recessed with the aforementioned first inner wall 201 as a carrier is formed between the closing transmission surface 23 and the limit surface 27; a guide surface 25 connected with the aforementioned opening transmission surface 24 is formed on the aforementioned second inner wall 202, and a guide surface inflection point 251 protruding toward the direction of the aforementioned matching groove 21 is formed between the opening transmission surface 24 and the guide surface 25. Before the switch is closed, the turntable 1 rotates to drive the drive shaft 11 to act on the guide surface 25. As the turntable 1 rotates, the drive shaft 11 continues to act on the guide surface 25 until the guide surface inflection point 251 is formed between the opening transmission surface 24 and the guide surface 25, so that the switch is buckled again.

[0036] Depend on Figure 2 and Figure 4 As shown, the end of the transmission plate 2 facing the turntable 1 is constituted as a turntable mating end 20, and the end of the transmission plate 2 facing the switch is constituted as a switch mating end 20′. The rotation center of the transmission plate 2 is located between the turntable mating end 20 and the switch mating end 20′, and the mating groove 21 is provided on the turntable mating end 20. A driving groove 26 extending in the direction of the rotation center is provided on the switch mating end 20′. The inner walls of the driving groove 26 facing each other on both sides of the switch handle of the switch are mirror-imaged in the depth direction of the driving groove 26. The inner walls of the driving groove facing each other on both sides of the switch handle of the switch are both constituted with driving ends 261. Further, see Figure 7 In another embodiment, in addition to the driving end 261, the inner wall of the driving groove also has an avoidance area 262, and the avoidance area 262 is used to avoid interference between the inner wall of the driving groove and the handle 51, such as interference that occurs when the transmission plate 2 acts on the handle 51 to re-click the switch.

[0037] See Figure 5 And combined Figure 1 When the aforementioned turntable 1 rotates counterclockwise, the drive shaft 11 abuts the closing transmission surface 23 and provides a transmission torque, driving the left transmission plate 2 to rotate clockwise. The switch mating end 20' overcomes the operating force F(Close) of the handle 51, closing the actuator 5. During this process, the drive shaft 11 and the closing transmission surface 23 come into contact, forming a transmission arm. The transmission arm between the contact point and the turntable 1 is L1, and the transmission arm between the contact point and the left transmission plate 2 is L2. As L1 < L2, the rotational torque output by the turntable 1 is F × L1. At this time, the transmission torque obtained by the left transmission plate 2 is F × L2. This effectively increases the torque obtained by the left transmission plate 2, thereby reducing the output force required by the electromagnetic system of the operating mechanism.

[0038] See Figure 6 And combined Figure 1When the aforementioned turntable 1 rotates clockwise, the drive shaft 11 abuts against the trip transmission surface 24 and provides a transmission torque, driving the left transmission plate 2 to rotate counterclockwise. The switch mating end 20' overcomes the operating force F(open) of the handle 51, causing the switch to open. During this process, the drive shaft 11 and the trip transmission surface 24 come into contact, forming a transmission arm. The transmission arm between the contact point and the turntable 1 is L3, and the transmission arm between the contact point and the left transmission plate 2 is L4. With L3 < L4, the transmission torque obtained by the left transmission plate 2 increases, reducing the output force required by the electromagnetic system of the operating mechanism.

[0039] In summary, since the present invention adopts the above structure, it effectively reduces the force characteristic requirements of the electromagnetic system, reduces the impact force on the operating mechanism, and improves the reliability of the operating mechanism. At the same time, the overall life is long and the structure is simple.

Claims

1. A transmission structure of a switch, comprising a rotary disk (1) and a transmission plate (2), wherein the transmission plate (2) cooperates with the rotary disk (1) and is driven to rotate by the rotation of the rotary disk (1), a driving shaft (11) is provided on the rotary disk (1), an open-shaped matching groove (21) is formed at one end of the transmission plate (2) facing the rotary disk (1), the groove wall of the matching groove (21) comprises a first inner wall (201) and a second inner wall (202) corresponding to each other, and is characterized in that: A closing transmission surface (23) is formed on the first inner wall (201). When the turntable (1) rotates, the drive shaft (11) pushes the closing transmission surface (23), causing the transmission plate (2) to act on the switch to close the switch. A first distance (L1) between the rotation center (O1) of the turntable (1) and a normal line (Y) on the closing transmission surface (23) is smaller than a second distance (L2) between the rotation center (O2) of the transmission plate (2) and the normal line (Y) on the closing transmission surface (23).

2. The transmission structure of a switch according to claim 1, characterized in that: The matching groove (21) extends toward the rotation center (O2) of the transmission plate (2), and a first angle (α) is formed between the closing transmission surface (23) and the depth direction (X) of the matching groove (21).

3. The transmission structure of a switch according to claim 2, characterized in that: The first angle (α) is 35-45°.

4. A switch transmission structure according to claim 1 or 2, characterized in that: A tripping transmission surface (24) is formed on the second inner wall (202); when the turntable (1) rotates, the drive shaft (11) pushes the tripping transmission surface (24) so ​​that the transmission plate (2) acts on the switch to trip the switch; a third distance (L3) between the rotation center (O1) of the turntable (1) and the normal line (Z) on the tripping transmission surface (24) is smaller than a fourth distance (L4) between the rotation center (O2) of the transmission plate (2) and the normal line (Z) on the tripping transmission surface (24).

5. The transmission structure of a switch according to claim 4, characterized in that: A second angle (β) is formed between the opening transmission surface (24) and the depth direction (X) of the matching groove (21).

6. The transmission structure of a switch according to claim 5, characterized in that: The second angle (β) is 5-15°.

7. The transmission structure of a switch according to claim 4, characterized in that: A limiting surface (27) connected to the closing transmission surface (23) is formed on the first inner wall (201), and an inflection point is formed between the closing transmission surface (23) and the limiting surface (27), which is recessed with the first inner wall (201) as a carrier; a guide surface (25) connected to the opening transmission surface (24) is formed on the second inner wall (202), and a guide surface inflection point (251) protruding in the direction of the matching groove (21) is formed between the opening transmission surface (24) and the guide surface (25). Before the switch is closed, the rotating disk (1) rotates to drive the drive shaft (11) to act on the guide surface (25). As the rotating disk (1) rotates, the drive shaft (11) continues to act on the guide surface (25) until the guide surface inflection point (251) is formed between the opening transmission surface (24) and the guide surface (25), so that the switch is locked again.

8. The transmission structure of a switch according to claim 7, characterized in that: One end of the transmission plate (2) facing the turntable (1) is configured as a turntable mating end (20), and one end of the transmission plate (2) facing the switch is configured as a switch mating end (20′). The rotation center (O2) of the transmission plate (2) is located between the turntable mating end (20) and the switch mating end (20′), and the mating groove (21) is provided on the turntable mating end (20).

9. The transmission structure of a switch according to claim 8, characterized in that: A drive groove (26) extending toward the rotation center (O2) of the transmission plate (2) is provided on the switch mating end (20′), and inner walls of the drive groove (26) facing each other and arranged on both sides of the switch handle of the switch are mirror-imaged in the depth direction of the drive groove (26), and are formed with a drive end (261) and an avoidance area (262).

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