Self-locking change-over switch based on low-voltage apparatus

Abstract

The invention discloses a self-locking change-over switch based on a low-voltage electric appliance, and relates to the technical field of change-over switches, the self-locking change-over switch comprises a switch panel, the front end of the switch panel is provided with an operation switch, the switch panel is sleeved with a first buffer rubber and a second buffer rubber, the rear end of the switch panel is provided with a locking screw sleeve through a thread, and the locking screw sleeve is provided with a second buffer rubber. A rotating shaft assembly is arranged at the rear end of the switch panel, a positioning assembly is arranged at the rear end of the rotating shaft assembly, the first buffer rubber and the second buffer rubber are arranged between the switch panel and the locking threaded sleeve, the change-over switch can be effectively protected, and when vibration is generated in the equipment operation process, the vibration can be effectively prevented from falling off. When the change-over switch is in use, the buffer rubber pad can effectively absorb vibration caused by motor start, stop or load change, and the first buffer rubber and the second buffer rubber are like shock absorbers, so that the influence of the vibration on the change-over switch is reduced, the stability of the internal structure of the change-over switch is ensured, and the service life of the change-over switch is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of transfer switches, and in particular to a self-locking transfer switch based on a low-voltage electrical appliance. Background Art

[0002] The transfer switch is also called a combination switch. It is different from the knife switch in that it is operated in a plane that rotates left and right. The transfer switch has the advantages of multiple contacts, multiple positions, small size, reliable performance, easy operation, and flexible installation. It is mostly used as a power supply introduction switch in the electrical control circuit of machine tools, and plays the role of isolating the power supply. It can also be used as a control switch to directly control the infrequent starting and stopping of small-capacity asynchronous motors. The transfer switch also has single-pole, double-pole and three-pole; The current self-locking transfer switch has at least the following technical problems: First, traditional transfer switches often lack effective buffering measures in their installation methods. The vibrations generated by the operation of the equipment can easily damage its internal structure, affecting its service life and performance stability.

[0003] Second, for the maintenance of the internal structure and replacement of components of the transfer switch, the existing design is complicated to disassemble and assemble, which is not conducive to quick inspection and maintenance, increasing the downtime and maintenance costs of the equipment. In terms of dust prevention, the existing transfer switch has insufficient protection measures, and dust can easily enter the interior, causing contact wear, short circuit and other faults, affecting the normal operation and reliability of the switch. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a self-locking transfer switch based on a low-voltage electrical appliance to solve the above-mentioned technical problems.

[0005] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: A self-locking conversion switch based on a low-voltage electrical appliance comprises a switch panel, an operating switch is arranged at the front end of the switch panel, a first buffer rubber and a second buffer rubber are sleeved on the switch panel, a locking screw sleeve is threadedly installed at the rear end of the switch panel, a rotating shaft assembly is arranged at the rear end of the switch panel, a positioning assembly is arranged at the rear end of the rotating shaft assembly, three contact assemblies are arranged at the rear end of the positioning assembly, limiting rods are slidably installed at both side ends of the rotating shaft assembly, cylindrical rods are fixedly installed at the side ends of the two limiting rods, mounting holes are opened on the two cylindrical rods, two guide rods are fixedly installed at the front end of the positioning assembly, and U-shaped frames are slidably installed through the two guide rods.

[0006] Preferably, the two ends of the U-shaped frame are respectively slidably installed in the installation holes opened by the two cylindrical rods, the upper end of the U-shaped frame is fixedly installed with a lifting rod, and the upper end of the U-shaped frame is slidably installed with a fixing rod.

[0007] Preferably, the upper end of the fixing rod is fixedly mounted on the rotating shaft assembly, a spring is sleeved on the circumferential surface of the fixing rod, the spring is fixedly mounted between the fixing rod and the U-shaped frame, and the lifting rod is slidably mounted on the upper end of the fixing rod.

[0008] Preferably: a dust cover is fixedly installed on the two limit plug rods, the dust cover is arranged on the outer surfaces of the shaft assembly, the positioning assembly and the three contact assemblies, a rectangular hole is opened on the dust cover, and a flip cover is hinged in the rectangular hole opened in the dust cover.

[0009] (III) Beneficial effects 1: The present invention can effectively protect the transfer switch by arranging the first buffer rubber and the second buffer rubber between the switch panel and the locking screw sleeve. When vibrations are generated during the operation of the equipment, such as vibrations caused by motor start-up, stop or load changes, the buffer rubber pad can effectively absorb these vibrations. The first buffer rubber and the second buffer rubber are like a "shock absorber", reducing the impact of vibrations on the transfer switch, ensuring the stability of its internal structure, and thus extending the service life of the transfer switch.

[0010] Second: The present invention provides a limit rod, a cylindrical rod and a U-shaped frame, so that the conversion switch is easy for maintenance personnel to quickly open its casing or related structures and conduct a visual inspection of internal contacts, wiring, springs and other components. For example, during daily inspections, staff can easily disassemble the conversion switch to check whether the contacts have abnormal conditions such as wear and ablation, so as to discover potential problems in time and avoid the occurrence of failures.

[0011] 3. The present invention configures the transfer switch as a quick disassembly and assembly structure. When a component of the transfer switch is damaged or aged, the easy-to-disassemble structure allows maintenance personnel to quickly replace the component with a new one, thereby shortening maintenance time and equipment downtime. For some commonly used transfer switches, the springs and contacts inside may become less elastic or worn after long-term use. Convenient disassembly and assembly allows these components to be quickly replaced to restore the performance of the switch.

[0012] 4: The present invention provides a dust cover on the outside of the transfer switch to protect its internal structure. In the daily environment, there are a large number of tiny particles such as dust, fiber, powder, etc., and the dust cover on the device can prevent these dust from entering the interior of the transfer switch and accumulating on key components such as contacts, springs, gears, etc., thereby not affecting the normal operation of the transfer switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0014] Figure 1 It is a structural diagram of the present invention as a whole; Figure 2 It is a structural diagram of the dust cover of the present invention; Figure 3 It is a structural diagram of the limiting plug rod of the present invention; Figure 4 is a structural diagram of the contact assembly of the present invention; Figure 5 is a structural diagram of the rotating shaft assembly of the present invention; Figure 6 This is a structural diagram of the first buffer rubber of the present invention; Figure 7 For the present invention Figure 3 A magnified view of the structure at A.

[0015] Legend: 11. Switch panel; 12. First buffer rubber; 13. Second buffer rubber; 14. Locking screw sleeve; 15. Operating switch; 21. Shaft assembly; 22. Guide rod; 23. U-shaped frame; 24. Lifting rod; 25. Fixing rod; 26. Spring; 31. Dust cover; 32. Limiting rod; 33. Cylindrical rod; 34. Flip cover; 35. Rectangular hole; 41. Contact assembly; 44. Positioning assembly. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0017] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in order to solve the problems existing in the prior art, the present invention provides a self-locking transfer switch based on a low-voltage electrical appliance, including a switch panel 11, an operating switch 15 is provided at the front end of the switch panel 11, a first buffer rubber 12 and a second buffer rubber 13 are sleeved on the switch panel 11, a locking screw sleeve 14 is threadedly installed at the rear end of the switch panel 11, a rotating shaft assembly 21 is provided at the rear end of the rotating shaft assembly 21, a positioning assembly 44 is provided at the rear end of the positioning assembly 44, three contact assemblies 41 are provided at the rear end of the positioning assembly 44, both side ends of the rotating shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41 are limitedly slidably installed with limiting rods 32, the side ends of the two limiting rods 32 are fixedly installed with cylindrical rods 33, the two cylindrical rods 33 are provided with mounting holes, two guide rods 22 are fixedly installed at the front end of the positioning assembly 44, and a U-shaped frame 23 is slidably installed through the two guide rods 22.

[0018] The two ends of the U-shaped frame 23 are respectively slidably installed in the installation holes opened by the two cylindrical rods 33, and a lifting rod 24 is fixedly installed on the upper end of the U-shaped frame 23. A fixing rod 25 is slidably installed on the upper end of the U-shaped frame 23. The switch panel 11, the operating switch 15, the rotating shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41 in the conversion switch are all connected together (the rotating shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41 are all the internal structures of the conversion switch in the prior art), and the three contact assemblies 41 are provided with a mounting head connected to the circuit, so when the operating switch 15 is rotated, the circuit can be converted through the structure in the rotating shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41, so as to achieve the function of the conversion switch. When installing the conversion switch, first put the switch panel 11 is installed with the mounting plate, the rear end of the switch panel 11 is inserted into the mounting plate, and then the first buffer rubber 12 and the second buffer rubber 13 are placed on the front and rear ends of the mounting plate respectively, and then the locking screw sleeve 14 is screwed and tightened with the switch panel 11, so that the switch panel 11 and the mounting plate can be fixed. The present invention can effectively protect the conversion switch by setting the first buffer rubber 12 and the second buffer rubber 13 between the switch panel 11 and the locking screw sleeve 14. When vibrations are generated during the operation of the equipment, such as vibrations caused by motor start-up, stop or load changes, the buffer rubber pad can effectively absorb these vibrations. The first buffer rubber 12 and the second buffer rubber 13 are like a "shock absorber", which reduces the impact of vibrations on the conversion switch and ensures the stability of its internal structure, thereby extending the service life of the conversion switch.

[0019] The upper end of the fixing rod 25 is fixedly installed on the rotating shaft assembly 21, and the circumferential surface of the fixing rod 25 is sleeved with a spring 26, and the spring 26 is fixedly installed between the fixing rod 25 and the U-shaped frame 23. The lifting rod 24 is slidably installed on the upper end of the fixing rod 25, and then the rotating shaft assembly 21 and the positioning assembly 44 and the three contact assemblies 41 are connected to the rear end of the switch panel 11 (the connection methods are all the connection methods of the conversion switch in the prior art). After that, the user inserts the two limiting plug rods 32 into the three contact assemblies 41 and the positioning assembly 44 and the side ends of the rotating shaft assembly 21, and the two cylindrical rods 33 are inserted into the rotating shaft assembly 21, and then the lifting rod 24 is moved upward, and the lifting rod 24 drives the U-shaped frame 23 to move upward, and then under the elastic force of the spring 26, the U-shaped frame 23 is squeezed, so that the U-shaped frame 23 can be inserted into the installation hole opened by the two cylindrical rods 33, thereby completing the installation. At this time, the rotating shaft The component 21, the positioning component 44 and the three contact components 41 as well as the internal structure thereof are all connected together. The present invention provides a limit rod 32, a cylindrical rod 33 and a U-shaped frame 23, so that the conversion switch is convenient for maintenance personnel to quickly open its casing or related structures and conduct a visual inspection of the internal contacts, wiring and other components. For example, in daily inspections, the staff can easily disassemble the conversion switch to check whether the contacts have abnormal conditions such as wear and ablation, so as to timely discover potential problems and avoid the occurrence of failures. The present invention configures the conversion switch as a quick disassembly and assembly structure. When a component of the conversion switch is damaged or aged, the structure that is easy to disassemble and assemble allows maintenance personnel to quickly replace new components, thereby shortening maintenance time and equipment downtime. For some commonly used conversion switches, the internal contacts may become less elastic or worn after long-term use. Convenient disassembly and assembly can quickly replace these components and restore the performance of the switch.

[0020] A dust cover 31 is fixedly installed on the two limit rods 32, and the dust cover 31 is sleeved on the outer surfaces of the shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41. A rectangular hole 35 is opened on the dust cover 31, and a flip cover 34 is hinged in the rectangular hole 35 opened in the dust cover 31. When the two limit rods 32 are installed, the dust cover 31 fixedly connected to the limit rod 32 will also be sleeved into the shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41. At this time, the dust cover 31 will protect the shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41, and can prevent dust from falling into the interior of the conversion switch. The flip cover 34 opened on the dust cover 31 can be opened during installation, and the lifting rod 24 can be moved up and down using a tool to control the U-shaped frame 23 to move up and down, thereby controlling the switch between the U-shaped frame 23 and the cylindrical rod 33. The present invention provides a dust cover 31 on the outside of the transfer switch to protect its internal structure. There are a large amount of tiny particles such as dust, fiber, and powder in the daily environment, and the dust cover 31 on the device can prevent the dust from entering the inside of the transfer switch and accumulating on key components such as contacts and gears, thereby not affecting the normal operation of the transfer switch.

[0021] Working principle: In the first step, the switch panel 11, the operating switch 15, the shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41 in the conversion switch are connected together (the shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41 are the internal structures of the conversion switch in the prior art), and the three contact assemblies 41 are provided with mounting heads connected to the circuits, so when the operating switch 15 is rotated, the circuit can be converted through the structures in the shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41, thereby achieving the function of the conversion switch. When installing the conversion switch, first install the switch panel 11 and the mounting plate, insert the rear end of the switch panel 11 into the mounting plate, and then A buffer rubber 12 and a second buffer rubber 13 are respectively placed at the front and rear ends of the mounting plate, and then the locking screw sleeve 14 and the switch panel 11 are screwed together to fix the switch panel 11 to the mounting plate. The present invention can effectively protect the conversion switch by setting the first buffer rubber 12 and the second buffer rubber 13 between the switch panel 11 and the locking screw sleeve 14. When vibrations are generated during the operation of the equipment, such as vibrations caused by motor start-up, stop or load changes, the buffer rubber pad can effectively absorb these vibrations. The first buffer rubber 12 and the second buffer rubber 13 are like a "shock absorber", which reduces the impact of vibrations on the conversion switch and ensures the stability of its internal structure, thereby extending the service life of the conversion switch.

[0022] In the second step, the rotating shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41 are connected to the rear end of the switch panel 11 (the connection methods are all the connection methods of the conversion switch in the prior art), and then the user inserts the two limit rods 32 into the three contact assemblies 41, the positioning assembly 44 and the side ends of the rotating shaft assembly 21, and the two cylindrical rods 33 are inserted through the rotating shaft assembly 21, and then the lifting rod 24 is moved upward, and the lifting rod 24 drives the U-shaped frame 23 to move upward, and then under the elastic force of the spring 26, the U-shaped frame 23 is squeezed, so that the U-shaped frame 23 can be inserted into the installation hole opened by the two cylindrical rods 33, thereby completing the installation. At this time, the rotating shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41 and their internal structures are all connected together. By providing the limit rod 32, the cylindrical rod 33 and the U-shaped frame 23, the conversion switch is convenient for maintenance personnel to quickly open its shell or related structure and conduct a visual inspection of the internal contacts, wiring and other components. For example, in daily inspections, the staff can easily disassemble the conversion switch to check whether the contacts are in abnormal conditions such as wear, ablation, etc., and timely discover potential problems to avoid the occurrence of failures. The present invention configures the conversion switch as a quick disassembly and assembly structure. When a component of the conversion switch is damaged or aged, the easy-to-disassemble and assembly structure allows maintenance personnel to quickly replace new components, thereby shortening maintenance time and equipment downtime. For some commonly used conversion switches, the internal contacts may become less elastic or worn after long-term use. Convenient disassembly and assembly can quickly replace these components to restore the performance of the switch.

[0023] In the third step, while the two limit plugs 32 are being installed, the dust cover 31 fixedly connected to the limit plug 32 will also be inserted into the shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41. At this time, the dust cover 31 will protect the shaft assembly 21, the positioning assembly 44 and the three contact assemblies 41 to prevent dust from falling into the interior of the conversion switch. During installation, the flip cover 34 opened on the dust cover 31 can be opened, and the lifting rod 24 can be moved up and down using a tool to control the U-shaped frame 23 to move up and down, thereby controlling the switch between the U-shaped frame 23 and the cylindrical rod 33. The present invention provides a dust cover 31 on the outside of the conversion switch to protect its internal structure. There is a large amount of tiny particles such as dust, fiber, powder, etc. in the daily environment, and the dust cover 31 on the device can prevent these dust from entering the interior of the conversion switch and accumulating on key components such as contacts and gears, thereby not affecting the normal operation of the conversion switch.

[0024] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A self-locking transfer switch based on a low-voltage electrical appliance, comprising a switch panel (11), characterized in that: An operating switch (15) is provided at the front end of the switch panel (11); a first buffer rubber (12) and a second buffer rubber (13) are sleeved on the switch panel (11); a locking screw sleeve (14) is threadedly mounted at the rear end of the switch panel (11); a rotating shaft assembly (21) is provided at the rear end of the switch panel (11); a positioning assembly (44) is provided at the rear end of the rotating shaft assembly (21); and three contact assemblies (41) are provided at the rear end of the positioning assembly (44); Wherein, both side ends of the rotating shaft assembly (21), the positioning assembly (44) and the three contact assemblies (41) are all provided with limiting plug rods (32) slidably mounted thereon, the side ends of the two limiting plug rods (32) are both fixedly mounted with cylindrical rods (33), the two cylindrical rods (33) are both provided with mounting holes, and the front end of the positioning assembly (44) is fixedly mounted with two guide rods (22), and the two guide rods (22) are penetrated and slidably mounted with U-shaped frames (23).

2. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 1, characterized in that: The two ends of the U-shaped frame (23) are respectively slidably installed in the installation holes opened in the two cylindrical rods (33).

3. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 2, characterized in that: A lifting rod (24) is fixedly mounted on the upper end of the U-shaped frame (23).

4. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 3, characterized in that: A fixing rod (25) is slidably mounted through the upper end of the U-shaped frame (23).

5. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 4, characterized in that: The upper end of the fixing rod (25) is fixedly mounted on the rotating shaft assembly (21).

6. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 5, characterized in that: A spring (26) is sleeved on the circumferential surface of the fixing rod (25); The spring (26) is fixedly mounted between the fixing rod (25) and the U-shaped frame (23).

7. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 6, characterized in that: The lifting rod (24) is slidably mounted on the upper end of the fixing rod (25).

8. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 7, characterized in that: Dust covers (31) are fixedly mounted on the two limit rods (32).

9. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 8, characterized in that: The dust cover (31) is sleeved on the outer surfaces of the rotating shaft assembly (21), the positioning assembly (44) and the three contact assemblies (41).

10. A self-locking transfer switch based on a low-voltage electrical appliance according to claim 9, characterized in that: The dust cover (31) is provided with a rectangular hole (35); A flip cover (34) is hingedly connected in the rectangular hole (35) formed in the dust cover (31).

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