Dual-power change-over switch and transmission mechanism thereof

Abstract

The utility model provides a dual power supply change-over switch and a transmission mechanism thereof, comprising a fixed plate, a first rotating shaft, a second rotating shaft, a first connecting rod, a second connecting rod, a guide plate and a driving shaft, the first rotating shaft and the second rotating shaft are distributed left and right and rotatably assembled on the fixed plate, the first rotating shaft is equipped with a first support plate, and the second rotating shaft is equipped with a second support plate. The first rotating shaft is provided with a first supporting plate, the second rotating shaft is provided with a second supporting plate, the first supporting plate and the second supporting plate are both provided with long-strip-shaped groove holes, and the two ends of the guide plate are movably connected into the long-strip-shaped groove hole of the first supporting plate and the long-strip-shaped groove hole of the second supporting plate respectively; the first end of the first connecting rod and the first end of the second connecting rod are hinged to the fixing plate, and the second end of the first connecting rod and the second end of the second connecting rod are hinged to the left side and the right side of the guide plate respectively. The driving shaft is connected with the guide plate to drive the guide plate to move left and right. Therefore, the dual-power change-over switch can be switched on and off firstly, and the stability of a product is ensured.

Description

Technical Field

[0001] The utility model relates to the field of dual-power devices, and particularly relates to a dual-power transfer switch and a transmission mechanism thereof. Background Art

[0002] In order to ensure the normal power supply in daily life and avoid power outages caused by faults in the power system, dual power supplies are used in large-scale continuous production enterprises such as petroleum, chemical, metallurgy, power, and communication industries, either in a split operation mode or in a main-backup power supply mode, to ensure that when one power supply fails and cuts off, the other power supply can be immediately put into use.

[0003] The switching of dual power supplies is particularly important. In the prior art, generally, the moving contacts responsible for connecting the normal power supply and the moving contacts responsible for disconnecting the faulty power supply operate synchronously. During the process of connecting and disconnecting the rated load current, this operation form results in a very short intermediate power outage time, but still can maintain the normal operation of the product. However, if a relatively high load current is disconnected and connected, the above results no longer exist, and it will be burned by the arc that has not been completely extinguished. In this way, it is very difficult to meet the requirements of the higher level of the on-off performance of the automatic transfer switch specified in the standard. Content of the Utility Model

[0004] Therefore, to solve the above problems, the utility model provides a dual-power transfer switch and a transmission mechanism thereof, which can drive two sets of moving contacts to separate first and then close to ensure the stability of the product.

[0005] To achieve the above object, the technical solution provided by the utility model is as follows:

[0006] A transmission mechanism of a dual-power transfer switch includes a fixing plate, a first rotating shaft, a second rotating shaft, a first connecting rod, a second connecting rod, a guide plate, and a driving shaft. The first rotating shaft and the second rotating shaft are arranged left and right and are rotatably assembled on the fixing plate. The first rotating shaft is assembled with a first support plate, and the second rotating shaft is assembled with a second support plate. Long strip-shaped slot holes are opened on both the first support plate and the second support plate. The long strip-shaped slot holes include a near slot hole section and a far slot hole section that are connected and arranged at an obtuse angle to each other. Both ends of the guide plate are respectively movably connected in the long strip-shaped slot holes of the first support plate and the second support plate. The first ends of the first connecting rod and the second connecting rod are both hinged to the fixing plate, and the second ends of the first connecting rod and the second connecting rod are respectively hinged to the left and right sides of the guide plate. The driving shaft is connected to the guide plate to drive the guide plate to move left and right.

[0007] Furthermore, the guide plate includes a middle connecting portion and a left plate and a right plate connected to the left and right sides of the middle connecting portion, the end of the left plate is movably connected to the long strip slot of the first support plate, and the end of the right plate is movably connected to the long strip slot of the second support plate; the second end of the first connecting rod is hinged to the left plate, and the second end of the second connecting rod is hinged to the right plate.

[0008] Furthermore, the middle connecting portion of the guide plate is provided with a strip-shaped mounting hole perpendicular to the length direction thereof, and the driving shaft is movably connected in the strip-shaped mounting hole.

[0009] Furthermore, the first connecting rod and the second connecting rod are both located between the first rotating shaft and the second rotating shaft.

[0010] Furthermore, the first connecting rod and the second connecting rod are of equal length, and a hinge point at the first end of the first connecting rod and a hinge point at the first end of the second connecting rod are arranged at the same height.

[0011] Furthermore, the proximal slot hole section of the first support plate is closer to the first rotating axis than the distal slot hole section, and the distal slot hole section of the first support plate extends in a direction away from the second rotating axis; the proximal slot hole section of the second support plate is closer to the second rotating axis than the distal slot hole section, and the distal slot hole section of the second support plate extends in a direction away from the first rotating axis.

[0012] A dual power conversion switch comprises a first moving contact, a second moving contact, a static contact and a transmission mechanism; the transmission mechanism is the transmission mechanism of the dual power conversion switch described above; the first rotating shaft is connected to the first moving contact; the second rotating shaft is connected to the second moving contact.

[0013] Furthermore, it also includes a shell plate, the fixed plate is assembled on the shell plate and forms an installation space with the shell plate, the first connecting rod, the second connecting rod, the guide plate, the first support plate and the second support plate are assembled in the installation space, the first moving contact, the second moving contact and the static contact are assembled on the side of the shell plate away from the fixed plate, the first rotating shaft and the second rotating shaft pass through the shell plate and are respectively connected to the first moving contact and the second moving contact.

[0014] Furthermore, a clearance window is provided on the fixing plate, and the driving shaft passes through the clearance window into the installation space and is connected to the guide plate.

[0015] The technical solution provided by the utility model has the following beneficial effects:

[0016] With the arrangement of the transmission mechanism of this solution, when the drive shaft drives the guide plate to move left and right, due to the cooperative action of the first connecting rod and the second connecting rod, the two ends of the guide plate can rise and fall in the up and down directions. Coupled with the structures of the long strip-shaped slot holes of the first support plate and the second support plate, a way of driving one rotating shaft to move first and the other rotating shaft to move later is realized, and finally the action of first separating and then closing of the double power supply transfer switch is achieved. When applied to the switching of double power supplies, the stable operation of the product is ensured. Brief Description of the Drawings

[0017] Figure 1 The figure shows a three-dimensional schematic diagram of the transmission mechanism of the double power supply transfer switch in the embodiment;

[0018] Figure 2 The figure shows a front view of the transmission mechanism of the double power supply transfer switch in the embodiment;

[0019] Figure 3 The figure shows a structural decomposition schematic diagram of the transmission mechanism of the double power supply transfer switch in the embodiment;

[0020] Figure 4 The figure shows a structural schematic diagram of the double power supply transfer switch in the embodiment;

[0021] Figure 5 The figure shows a partial structural decomposition schematic diagram of the double power supply transfer switch in the embodiment. Detailed Embodiments

[0022] To further illustrate each embodiment, the present invention provides drawings. These drawings are a part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be used to explain the operating principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0023] In the description of the present invention, the orientation or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] Now, the present invention will be further described in conjunction with the drawings and specific embodiments.

[0025] Refer to Figures 1 to 3As shown in the figure, a transmission mechanism 10 of a dual-power conversion switch provided in this embodiment includes a fixed plate 11, a first rotating shaft 121, a second rotating shaft 122, a first connecting rod 15, a second connecting rod 16, a guide plate 17, and a driving shaft 18. The first rotating shaft 121 and the second rotating shaft 122 are distributed left and right and are rotatably assembled on the fixed plate 11. The first rotating shaft 121 is assembled with a first support plate 13, and the second rotating shaft 122 is assembled with a second support plate 14. Specifically, in this embodiment, the first rotating shaft 121 and the second rotating shaft 122 are square shafts. The first support plate 13 is sleeved on the first rotating shaft 121 to achieve circumferential limit, and the second support plate 14 is sleeved on the second rotating shaft 122 to achieve circumferential limit.

[0026] Long strip-shaped slot holes are formed on both the first support plate 13 and the second support plate 14. The long strip-shaped slot holes include a near slot hole section and a far slot hole section that are connected and arranged at an obtuse angle to each other. Specifically, the long strip-shaped slot hole on the first support plate 13 is defined as the first long strip-shaped slot hole 133. The near slot hole section and the far slot hole section of the first long strip-shaped slot hole 133 are respectively the first near slot hole section 131 and the first far slot hole section 132. The long strip-shaped slot hole on the second support plate 14 is defined as the second long strip-shaped slot hole 143. The near slot hole section and the far slot hole section of the second long strip-shaped slot hole 143 are respectively the second near slot hole section 141 and the second far slot hole section 142. In this embodiment, the first near slot hole section 131 is closer to the first rotating shaft 121 than the first far slot hole section 132. The first far slot hole section 132 of the first support plate 13 extends in a direction away from the second rotating shaft 122, that is, the first far slot hole section 132 extends in the lower left direction. The second near slot hole section 141 is closer to the second rotating shaft 122 than the second far slot hole section 142. The second far slot hole section 142 of the second support plate 14 extends in a direction away from the first rotating shaft 121, that is, the second far slot hole section 142 extends in the lower right direction. The two ends of the guide plate 17 are respectively movably connected in the long strip-shaped slot holes (i.e., the first long strip-shaped slot hole 133) of the first support plate 13 and the long strip-shaped slot holes (i.e., the second long strip-shaped slot hole 143) of the second support plate 14.

[0027] The first ends of the first connecting rod 15 and the second connecting rod 16 are both hinged to the fixed plate 11. The second ends of the first connecting rod 15 and the second connecting rod 16 are respectively hinged to the left and right sides of the guide plate 17. The driving shaft 18 is connected to the guide plate 17 to drive the guide plate 17 to move left and right.

[0028] Continue to refer to Figure 4 and Figure 5As shown in the figure, this embodiment also provides a dual power supply transfer switch, which includes a first moving contact 22, a second moving contact 23, a static contact 24, and a transmission mechanism; wherein, the transmission mechanism is the transmission mechanism 10 of the above-mentioned dual power supply transfer switch; the first rotating shaft 121 is connected to the first moving contact 22; the second rotating shaft 122 is connected to the second moving contact 23.

[0029] With such a setting, when the drive shaft 18 drives the guide plate 17 to move left and right, due to the cooperative action of the first connecting rod 15 and the second connecting rod 16, the two ends of the guide plate 17 can rise and fall in the up and down directions. For example, when the guide plate 17 moves to the right, the left side of the guide plate 17 is restricted by the first connecting rod 15 and is pulled upward by the first connecting rod 15, and the right side of the guide plate 17 is restricted by the second connecting rod 16, so that the left end of the guide plate 17 swings upward to the right and enters the first near slot section 131 on the left side, while the right end of the guide plate 17 swings downward to the right and enters the second far slot section 142 on the right side; at this time, the left end of the guide plate 17 drives the first support plate 13 and the first rotating shaft 121 to act, and the right end of the guide plate 17 moves to coincide with the second far slot section 142. Therefore, the second support plate 14 and the second rotating shaft 122 remain stationary, that is, the first moving contact 22 is closed and the second moving contact 23 remains open.

[0030] When the guide plate 17 is in the rightmost position (the first moving contact 22 is closed and the second moving contact 23 is open), when the drive shaft 18 drives the guide plate 17 to move to the left, the left end of the guide plate 17 moves downward to the left, and the right end of the guide plate 17 moves upward to the left; the downward movement of the left end of the guide plate 17 causes the left end of the guide plate 17 to first pass through the first near slot section 131 and drive the first support plate 13 and the first rotating shaft 121 to rotate in the reverse direction, realizing the opening of the first moving contact 22. At this time, the right end of the guide plate 17 is still in the second far slot section 142 and coincides with the extending direction of the second far slot section 142, so as to keep the second support plate 14, the second rotating shaft 122 and the second moving contact 23 stationary, realizing the prior opening operation of the first moving contact 22. When the left end of the guide plate 17 transitions to the first far slot section 132, the right end of the guide plate 17 also transitions into the second near slot section 141 accordingly. At this time, the continuous leftward movement of the guide plate 17 makes the trajectory of the left end of the guide plate 17 coincide with the first far slot section 132, and the first support plate 13 and the first rotating shaft 121 no longer act. After the right end of the guide plate 17 enters the second near slot section 141, it drives the second support plate 14 and the second rotating shaft 122 to start acting, realizing the closing operation of the second contact 23. Vice versa, the movement of the guide plate 17 from the leftmost position to the rightmost position can realize the operation of the second moving contact 23 opening first and the first moving contact 22 closing later.

[0031] Thus, the dual power conversion switch and its transmission mechanism of the present application can realize the action of opening first and closing later of the dual power conversion switch, and be applied to the switching of dual power sources to ensure the stable operation of the product. The structure is simple to realize and the operation is reliable.

[0032] Furthermore, the first connecting rod 15 and the second connecting rod 16 are both located between the first rotating shaft 121 and the second rotating shaft 122, so that the movements of the connecting rod and the rotating shaft will not interfere with each other. Further, the first connecting rod 15 and the second connecting rod 16 are of equal length, and the hinge point of the first end of the first connecting rod 15 and the hinge point of the first end of the second connecting rod 16 are arranged at the same height. Such an arrangement can ensure the stable operation of the transmission mechanism. Of course, in other embodiments, the arrangement position and structure of the first connecting rod 15 and the second connecting rod 16 are not limited to this.

[0033] Furthermore, the guide plate 17 includes a middle connecting portion 171 and a left side plate 172 and a right side plate 173 connected to the left and right sides of the middle connecting portion 171. The end of the left side plate 172 is movably connected to the first long strip slot 133 of the first support plate 13, and the end of the right side plate 173 is movably connected to the second long strip slot 143 of the second support plate 14. The second end of the first connecting rod 15 is hinged on the left side plate 172, and the second end of the second connecting rod 16 is hinged on the right side plate 173. In this way, the guide plate 17 is stably connected to other components. More specifically, the middle connecting portion 171 of the guide plate 17 is provided with a strip mounting hole 174 perpendicular to its length direction, and the drive shaft 18 is movably connected to the strip mounting hole 174. In this way, the left and right translation of the drive shaft 18 will not interfere with the moving trajectory of the guide plate 17, ensuring the smooth movement of the mechanism.

[0034] Furthermore, the dual power conversion switch also includes a housing plate 21, the fixed plate 11 is assembled on the housing plate 21, and forms an installation space 100 with the housing plate 21, the first connecting rod 15, the second connecting rod 16, the guide plate 17, the first support plate 13 and the second support plate 14 are all assembled in the installation space 100, so that most of the components of the transmission mechanism are assembled in isolation; the first moving contact 22, the second moving contact 23 and the static contact 24 are assembled on the side of the housing plate 21 away from the fixed plate 11, the first rotating shaft 121 and the second rotating shaft 122 pass through the housing plate 21 and are respectively connected to the first moving contact 22 and the second moving contact 23; the transmission mechanism and the contact part are assembled in isolation without interfering with each other. Of course, in other embodiments, the assembly method of the transmission mechanism and the contact part of the dual power conversion switch is not limited to this.

[0035] The fixing plate 11 is provided with a clearance window 111 , through which the driving shaft 18 passes into the installation space 100 and is connected to the guide plate 17 ; the driving shaft 18 is used to connect driving components such as a driving handle.

[0036] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A transmission mechanism of a dual-power conversion switch, characterized in that: It includes a fixed plate, a first rotating shaft, a second rotating shaft, a first connecting rod, a second connecting rod, a guide plate and a driving shaft. The first rotating shaft and the second rotating shaft are distributed left and right and are rotatably assembled on the fixed plate. The first rotating shaft is assembled with a first support plate, and the second rotating shaft is assembled with a second support plate. Long strip-shaped slot holes are provided on both the first support plate and the second support plate. The long strip-shaped slot holes include a near slot hole section and a far slot hole section that are connected and arranged at an obtuse angle to each other. Both ends of the guide plate are respectively movably connected in the long strip-shaped slot holes of the first support plate and the second support plate; the first ends of the first connecting rod and the second connecting rod are both hinged to the fixed plate, and the second ends of the first connecting rod and the second connecting rod are respectively hinged to the left and right sides of the guide plate; the driving shaft is connected to the guide plate to drive the guide plate to move left and right.

2. The drive mechanism of the dual-power conversion switch according to claim 1, characterized in that: The guide plate includes an intermediate connecting portion and left and right side plates connected to both sides of the intermediate connecting portion. The end of the left side plate is movably connected in the long strip-shaped slot hole of the first support plate, and the end of the right side plate is movably connected in the long strip-shaped slot hole of the second support plate; the second end of the first connecting rod is hinged to the left side plate, and the second end of the second connecting rod is hinged to the right side plate.

3. The drive mechanism of the dual-power conversion switch according to claim 2, characterized in that: A strip-shaped mounting hole perpendicular to its length direction is provided in the intermediate connecting portion of the guide plate, and the driving shaft is movably connected in the strip-shaped mounting hole.

4. The drive mechanism of the dual-power conversion switch according to claim 1, characterized in that: Both the first connecting rod and the second connecting rod are located between the first rotating shaft and the second rotating shaft.

5. The transmission mechanism of the dual-power conversion switch according to claim 1, characterized in that: The first connecting rod and the second connecting rod are of equal length, and the hinge points of the first ends of the first connecting rod and the second connecting rod are arranged at the same height.

6. The drive mechanism of the dual power supply transfer switch according to claim 1, characterized in that: The near slot hole section of the first support plate is closer to the first rotating shaft than the far slot hole section, and the far slot hole section of the first support plate extends in a direction away from the second rotating shaft; the near slot hole section of the second support plate is closer to the second rotating shaft than the far slot hole section, and the far slot hole section of the second support plate extends in a direction away from the first rotating shaft.

7. A dual-power conversion switch, comprising a first moving contact, a second moving contact, a static contact and a transmission mechanism; characterized in that: The transmission mechanism is the transmission mechanism of the dual-power conversion switch according to any one of claims 1 to 6; the first rotating shaft is connected to the first moving contact; the second rotating shaft is connected to the second moving contact.

8. The double power supply transfer switch according to claim 7, characterized in that: It further includes a housing plate. The fixed plate is assembled on the housing plate and forms an installation space with the housing plate. The first connecting rod, the second connecting rod, the guide plate, the first support plate and the second support plate are assembled in the installation space. The first moving contact, the second moving contact and the static contact are assembled on the side of the housing plate away from the fixed plate. The first rotating shaft and the second rotating shaft pass through the housing plate and are respectively connected to the first moving contact and the second moving contact.

9. The double power supply transfer switch according to claim 8, wherein: A relief window is provided on the fixed plate, and the driving shaft passes through the relief window and enters the installation space and is connected to the guide plate.

Images