Low-voltage cabinet knife switch mechanism capable of being manually and electrically opened and closed

Abstract

The utility model discloses a low-voltage cabinet knife switch mechanism capable of being manually and electrically opened and closed. The low-voltage cabinet knife switch mechanism comprises a fixed seat, a static contact, a knife switch, a transmission module and a driving module, the fixed seat is mounted in the low-voltage cabinet; the static contact is fixedly arranged on the fixed seat; the driving module comprises a manual driving unit and an electric driving unit; and the manual driving unit and the electric driving unit are connected with the knife switch through the transmission module to drive the knife switch to be separated from or combined with the static contact. Under daily conditions, the electric driving unit and the transmission module are matched to control and drive the switch blade and the static contact to be separated and combined, so that the risk of electric shock of operators can be avoided, the operation efficiency can be improved, the requirements of a modern electric power system on automation and intelligentization are met, and remote control and programmed operation are realized. When the electric driving unit and a power system associated with the electric driving unit break down, the manual driving unit and the transmission module are matched to control and drive the switch blade and the static contact to be separated and combined, and the situation that equipment cannot work normally is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of knife switches, and in particular to a low-voltage cabinet knife switch mechanism that can be manually and electrically operated. Background Technology

[0002] Low-voltage knife switches, as a common type of low-voltage power distribution equipment, are widely used in industrial and civil power systems, primarily for circuit switching control. Traditionally, low-voltage knife switches rely mainly on manual operation. While simple and direct, manual operation has several limitations in practical applications. First, manual operation requires personnel to touch the equipment, increasing the risk of electric shock. Second, manual operation is inefficient. Third, manual operation cannot meet the automation and intelligence requirements of modern power systems, making remote control and programmed operation difficult. However, completely replacing manual operation with electric operation also presents problems. For example, if the electric operating mechanism malfunctions, the equipment will not function properly, leading to system failure. Furthermore, in special circumstances, such as emergency repairs or power supply failures in the electric operating system, manual operation remains necessary. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a low-voltage cabinet knife switch mechanism that can be manually and electrically operated.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A low-voltage switchgear mechanism that can be manually and electrically opened and closed includes a fixed base, a stationary contact, a knife switch, a transmission module, and a drive module.

[0006] The mounting bracket is installed inside the low-voltage cabinet;

[0007] The stationary contact is fixedly mounted on the mounting base;

[0008] The drive module includes a manual drive unit and an electric drive unit;

[0009] Both the manual drive unit and the electric drive unit are connected to the switch via a transmission module, which drives the switch to open and close with the stationary contact.

[0010] In this technical solution, under normal circumstances, the electric drive unit and transmission module work together to control and drive the switch to open and close with the stationary contact. This not only avoids the risk of electric shock to operators but also improves operational efficiency, meets the requirements of modern power systems for automation and intelligence, and enables remote control and programmed operation. When the electric drive unit or its associated power system malfunctions, the manual drive unit and transmission module work together to control and drive the switch to open and close with the stationary contact, preventing the equipment from malfunctioning.

[0011] Furthermore, the transmission module includes a mounting base and a transmission assembly;

[0012] The mounting base is installed inside the low-voltage cabinet, and there is a distance between it and the fixed base;

[0013] The transmission assembly, manual drive unit, and electric drive unit are all mounted on the mounting base.

[0014] In this technical solution, there is a certain distance between the manual drive unit and the switch, which can greatly reduce the risk of electric shock to the operator.

[0015] Furthermore, the transmission assembly includes a swing arm and a connecting assembly;

[0016] One end of the connecting assembly is rotatably connected to the swing arm, and the other end is connected to the switch.

[0017] Both the manual drive unit and the electric drive unit are connected to the swing arm, driving the swing arm to rotate, causing the connecting assembly to move back and forth, thereby realizing the opening and closing of the knife switch and the stationary contact.

[0018] Furthermore, the swing arm includes a pivot, a first sub-arm, and a second sub-arm;

[0019] The rotating shaft is rotatably mounted on the mounting base;

[0020] One end of the first sub-arm is connected to the rotating shaft, and the other end is rotatably connected to the connecting assembly;

[0021] One end of the second sub-arm is connected to the rotating shaft, and the other end is connected to the manual drive unit;

[0022] The electric drive unit is connected to the rotating shaft.

[0023] Furthermore, the pivot, the first sub-arm, and the second sub-arm are integrally formed, which can greatly improve the stability of the swing arm.

[0024] Furthermore, the electric drive unit includes a gear assembly and a drive motor;

[0025] The drive motor is mounted on the mounting base and connected to the rotating shaft through a gear assembly, thereby driving the rotating shaft to rotate.

[0026] Furthermore, the manual drive unit includes an operating shaft and a handle;

[0027] The operating shaft is rotatably connected to the mounting base via a bearing, with one end of the operating shaft engaging with the second sub-arm and the other end connected to the handle.

[0028] Furthermore, the handle is detachably connected to the operating shaft. When the manual drive unit is not in use for manual operation, the handle can be detached to prevent it from obstructing pedestrian walkway space and to prevent accidental collisions with the handle by the operator.

[0029] Furthermore, it also includes positioning components;

[0030] The positioning component includes a positioning auxiliary component, a spring, and a locking component;

[0031] The second sub-arm is provided with a first positioning groove and a second positioning groove on its side;

[0032] One end of the positioning auxiliary component is installed and connected to the mounting base, and the other end is close to the side of the second sub-arm. The positioning auxiliary component has a receiving groove inside that extends to the side of the second sub-arm and opens up the end face of the side of the second sub-arm.

[0033] The spring is located in the receiving groove, with one end of the spring touching the bottom of the receiving groove and the other end connected to the locking member located at the opening of the receiving groove, giving the locking member a pushing force towards the side of the second sub-arm.

[0034] The first and second positioning grooves cooperate with the locking component to maintain the switch and the stationary contact in an open or closed state.

[0035] Furthermore, the second sub-arm is provided with a first limiting protrusion and a second limiting protrusion;

[0036] The mounting base is provided with a third limiting protrusion, which extends toward the second sub-arm and cooperates with the first limiting protrusion and the second limiting protrusion to limit the rotation angle of the second sub-arm.

[0037] Compared with existing technologies, the principles and advantages of this technical solution are as follows:

[0038] In this technical solution, under normal circumstances, the electric drive unit and transmission module work together to control and drive the switch to open and close with the stationary contact. This not only avoids the risk of electric shock to operators but also improves operational efficiency, meets the requirements of modern power systems for automation and intelligence, and enables remote control and programmed operation. When the electric drive unit or its associated power system malfunctions, the manual drive unit and transmission module work together to control and drive the switch to open and close with the stationary contact, preventing the equipment from malfunctioning. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the services required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is one of the structural diagrams of a low-voltage cabinet knife switch mechanism that can be manually and electrically operated according to an embodiment of this utility model;

[0041] Figure 2 This is a second structural diagram of a low-voltage switchgear mechanism that can be manually and electrically opened and closed according to an embodiment of the present utility model (the knife switch and the stationary contact are in the closed state).

[0042] Figure 3 This is one of the structural diagrams of the area comprising the mounting base, swing arm, and drive module in a low-voltage cabinet knife switch mechanism that can be manually and electrically operated according to an embodiment of this utility model.

[0043] Figure 4 This is the second structural diagram of the area comprising the mounting base, swing arm, and drive module in a low-voltage cabinet knife switch mechanism that can be manually and electrically operated according to an embodiment of this utility model.

[0044] Figure 5 This is a cross-sectional view of the positioning component in a low-voltage cabinet knife switch mechanism that can be manually and electrically operated, according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the locking part of the positioning component in a low-voltage cabinet knife switch mechanism that can be manually and electrically opened and closed according to an embodiment of the present utility model, where the locking part is inserted into the first positioning groove.

[0046] Figure 7 This is a structural diagram of the connecting component in a low-voltage switchgear mechanism that can be manually and electrically operated (the end connected to the switch is rotatable) according to an embodiment of the present invention.

[0047] Figure 8 This is a schematic diagram illustrating the separation of the handle and operating shaft in a low-voltage cabinet knife switch mechanism that can be manually and electrically operated according to an embodiment of the present invention.

[0048] Figure 9 This is a structural diagram of the swing arm in a low-voltage cabinet knife switch mechanism that can be manually and electrically operated, according to an embodiment of this utility model.

[0049] Figure label:

[0050] 1-Fixed base; 2-Stationary contact; 3-Knife switch; 4-Mounting base; 5-Swing arm; 6-Connecting assembly; 7-Rotating shaft; 8-First sub-arm; 9-Second sub-arm; 10-Gear assembly; 11-Drive motor; 12-Operating shaft; 13-Handle; 14-Positioning auxiliary component; 15-Spring; 16-Card-positioning component; 17-First positioning groove; 18-Second positioning groove; 19-Accommodation groove; 20-First limiting protrusion; 21-Second limiting protrusion; 22-Third limiting protrusion. Detailed Implementation

[0051] The present invention will be further described below with reference to specific embodiments:

[0052] like Figures 1 to 9 As shown in the figure, the low-voltage switchgear mechanism that can be manually and electrically opened and closed according to this embodiment includes a fixed base 1, a stationary contact 2, a switch 3, a transmission module, a drive module, and a positioning component;

[0053] The transmission module includes a mounting base 4 and a transmission assembly; the drive module includes a manual drive unit and an electric drive unit.

[0054] Both the fixed base 1 and the mounting base 4 are installed inside the low-voltage cabinet, and there is a certain distance between the mounting base 4 and the fixed base 1.

[0055] The stationary contact 2 is fixedly installed on the fixed base 1; one end of the switch 3 is rotatably connected to the fixed base 1, and the other end can be opened or closed with the stationary contact 2 by changing the rotation angle of the switch 3.

[0056] The transmission assembly, manual drive unit, and electric drive unit are all mounted on the mounting base 4. The manual drive unit and the electric drive unit are both connected to the switch 3 through the transmission assembly, which drives the switch 3 to open and close with the stationary contact 2.

[0057] Specifically, in this embodiment, the transmission assembly includes a swing arm 5 and a connecting assembly 6; the swing arm 5 includes a rotating shaft 7, a first sub-arm 8, and a second sub-arm 9; the rotating shaft 7 is rotatably mounted on the mounting base 4; one end of the first sub-arm 8 is connected to the rotating shaft 7; one end of the second sub-arm 9 is connected to the rotating shaft 7. The rotating shaft 7, the first sub-arm 8, and the second sub-arm 9 are integrally formed. One end of the connecting assembly 6 is rotatably connected to the other end of the first sub-arm 8, and the other end of the connecting assembly 6 is connected to the knife gate 3.

[0058] The electric drive unit includes a gear assembly 10 and a drive motor 11 (which can be remotely controlled by a remote control system or on-site controlled by a controller installed on-site); the drive motor 11 is mounted on the mounting base 4 and connected to the rotating shaft 7 through the gear assembly 10, thereby driving the rotating shaft 7 to rotate.

[0059] The manual drive unit includes an operating shaft 12 and a handle 13. The operating shaft 12 is rotatably connected to the mounting base 4 via a bearing, and one end of the operating shaft 12 engages with the other end of the second sub-arm 9. The other end of the operating shaft 12 is detachably connected to the handle 13 (a limiting structure is provided at the connection between the operating shaft 12 and the handle 13, and a limiting structure is also provided at the connection between the handle 13 and the operating shaft 12, such as...). Figure 8 As shown, when the handle 13 needs to be connected to the operating shaft 12, simply insert the end of the handle 13 with the limiting structure into the end of the operating shaft 12 with the limiting structure. With the cooperation of their respective limiting structures, the handle 13 can drive the operating shaft 12 to rotate.

[0060] The positioning assembly includes a positioning auxiliary component 14, a spring 15, and a locking component 16 (specifically a steel ball); the second sub-arm 9 has a first positioning groove 17 and a second positioning groove 18 on its side; one end of the positioning auxiliary component 14 is installed and connected to the mounting base 4, and the other end is close to the side of the second sub-arm 9, and the positioning auxiliary component 14 has a receiving groove 19 extending towards the side of the second sub-arm 9 and opening up its end face close to the side of the second sub-arm 9; the spring 15 is located in the receiving groove 19, one end of the spring 15 touches the bottom of the receiving groove 19, and the other end is connected to the locking component 16 located at the opening of the receiving groove 19, giving the locking component 16 a pushing force towards the side of the second sub-arm 9; the first positioning groove 17 and the second positioning groove 18 cooperate with the locking component 16 to keep the knife switch 3 and the stationary contact 2 in the open or closed state.

[0061] The second sub-arm 9 is provided with a first limiting protrusion 20 and a second limiting protrusion 21; the mounting base 4 is provided with a third limiting protrusion 22, which extends in the direction of the second sub-arm 9 and cooperates with the first limiting protrusion 20 and the second limiting protrusion 21 to limit the angle of rotation of the second sub-arm 9.

[0062] In this embodiment,

[0063] The working principle of electrically controlling the opening and closing of the switch 3 and the stationary contact 2 is as follows:

[0064] When remote control is required, the drive motor 11 is remotely controlled through the remote control system, which in turn drives the rotating shaft 7 to rotate through the gear assembly 10. The rotating shaft 7 then drives the first sub-arm 8 to rotate, and finally the first sub-arm 8 drives the connecting assembly 6 to move back and forth, thereby rotating the knife switch 3, so that the knife switch 3 is separated from or connected to the stationary contact 2.

[0065] When on-site control is required, the drive motor 11 is controlled by the on-site controller, which in turn drives the rotating shaft 7 to rotate through the gear assembly 10. The rotating shaft 7 then drives the first sub-arm 8 to rotate, and finally the first sub-arm 8 drives the connecting assembly 6 to move back and forth, thereby rotating the knife switch 3, so that the knife switch 3 is separated from or connected to the stationary contact 2.

[0066] The working principle of manually controlling the opening and closing of the switch 3 and the stationary contact 2 is as follows:

[0067] Insert the handle 13 into the operating shaft 12, and drive the operating shaft 12 to rotate through the handle 13. The operating shaft 12 then drives the second sub-arm 9, the rotating shaft 7, and the first sub-arm 8 to rotate. Finally, the first sub-arm 8 drives the connecting assembly 6 to move back and forth, thereby rotating the knife switch 3, so that the knife switch 3 is separated from or connected to the stationary contact 2.

[0068] In this embodiment, under normal circumstances, the electric drive unit and transmission module work together to control and drive the switch 3 to open and close with the stationary contact 2. This not only avoids the risk of electric shock to operators but also improves operational efficiency, meeting the requirements of modern power systems for automation and intelligence, and enabling remote control and programmed operation. When the electric drive unit and its associated power system malfunction, the manual drive unit and transmission module work together to control and drive the switch 3 to open and close with the stationary contact 2, preventing the equipment from malfunctioning.

[0069] The above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all changes made in accordance with the shape and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A low voltage switchgear knife switch mechanism manually and electrically operable, characterized in that, The utility model relates to a low-voltage switch cabinet, including fixed seat, static contact, gate, transmission module and drive module. The fixed seat is installed in the low-voltage cabinet. The static contact is fixedly installed on the fixed seat. The drive module includes a manual drive unit and an electric drive unit. The manual drive unit and the electric drive unit are connected with the gate through the transmission module to drive the gate to separate from or combine with the static contact.

2. A manually and electrically operable opening and closing mechanism for a low voltage switchgear knife switch according to claim 1, characterized in that, The transmission module includes a mounting seat and a transmission assembly. The mounting seat is installed in the low-voltage cabinet and has a distance from the fixed seat. The transmission assembly, the manual drive unit and the electric drive unit are installed on the mounting seat.

3. A manually and electrically operable opening and closing mechanism for a low voltage switchgear knife switch according to claim 2, characterized in that, The transmission assembly includes a swing arm and a connecting assembly. One end of the connecting assembly is rotatably connected with the swing arm, and the other end is connected with the gate. The manual drive unit and the electric drive unit are connected with the swing arm to drive the swing arm to rotate, so that the connecting assembly moves forward and backward, thereby realizing the separation or combination of the gate and the static contact.

4. The low voltage switchgear knife switch mechanism manually and electrically operated according to claim 3, characterized in that, The swing arm includes a rotating shaft, a first sub-arm and a second sub-arm. The rotating shaft is rotatably installed on the mounting seat. One end of the first sub-arm is connected with the rotating shaft, and the other end is rotatably connected with the connecting assembly. One end of the second sub-arm is connected with the rotating shaft, and the other end is connected with the manual drive unit. The electric drive unit is connected with the rotating shaft.

5. A manually and electrically operable opening and closing mechanism for a low voltage switchgear knife according to claim 4, characterized in that, The rotating shaft, the first sub-arm and the second sub-arm are integrally formed.

6. A manually and electrically operable opening and closing mechanism for a low voltage switchgear knife switch according to claim 4, characterized in that, The electric drive unit includes a gear assembly and a drive motor. The drive motor is installed on the mounting seat and connected with the rotating shaft through the gear assembly to drive the rotating shaft to rotate.

7. A manually and electrically operable opening and closing mechanism for a low voltage switchgear knife switch according to claim 4, characterized in that, The manual drive unit includes an operating shaft and a handle. The operating shaft is rotatably connected with the mounting seat through a bearing, one end of the operating shaft is engaged with the second sub-arm, and the other end of the operating shaft is connected with the handle.

8. A manually and electrically operable opening and closing mechanism for a low voltage switchgear knife switch according to claim 7, characterized in that, The handle is detachably connected with the operating shaft.

9. A manually and electrically operable opening and closing mechanism for a low voltage switchgear knife switch according to claim 4, characterized in that, The utility model also includes a positioning assembly. The positioning assembly includes a positioning auxiliary, a spring and a clamping part. The second sub-arm is provided with a first positioning groove and a second positioning groove. One end of the positioning auxiliary is connected with the mounting seat, and the other end is close to the side surface of the second sub-arm. The spring is arranged in the accommodating groove, one end of the spring is in contact with the groove bottom of the accommodating groove, the other end of the spring is connected with the clamping part at the groove opening of the accommodating groove, and the clamping part is given a pushing force in the direction of the side surface of the second sub-arm. The first positioning groove and the second positioning groove cooperate with the clamping part to maintain the gate and the static contact in the separated state or the combined state.

10. A manually and electrically operable opening and closing mechanism for a low voltage switchgear knife switch according to claim 4, characterized in that, The second sub-arm is provided with a first limiting protrusion and a second limiting protrusion. The mounting seat is provided with a third limiting protrusion extending in the direction of the second sub-arm and cooperating with the first limiting protrusion and the second limiting protrusion to limit the rotation angle of the second sub-arm.

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