Multi-linkage travel switch

Abstract

This invention relates to the field of electrical equipment technology, and in particular to a multi-bar linkage limit switch, comprising a mounting plate. Three rotating shafts are evenly arranged on the front side of the mounting plate. Each of the three rotating shafts has a meshing transmission gear fitted on the outer side of one end. The other ends of the three rotating shafts pass through the outer side of the mounting plate and are fitted with a swing rod. An insulating protective cover is provided on the front side of the mounting plate, and a transmission shaft is located on the front side of the insulating protective cover. A knob is fitted on the outer side of one end of the transmission shaft, and the other end of the transmission shaft passes through the insulating protective cover and is connected to a transmission insert. A transmission slot matching the transmission insert is opened at one end of the rotating shaft opposite to the transmission shaft. Guide sleeves are evenly arranged on the rear side of the mounting plate, and insulating push rods are inserted into the guide sleeves. Moving wire sleeves are provided at the upper ends of the three insulating push rods. Insulating blocks are evenly arranged on the rear side of the mounting plate. This invention facilitates the cutting off and closing of high-voltage electricity while preventing electric arc injuries to operators during high-voltage closure.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to a multi-bar linkage limit switch. Background Technology

[0002] In the field of electrical circuit control, switches are basically divided into two categories: automatic control switches and manual control switches. Automatic control switches use an internal electromagnetic relay switch to attract or disengage the armature piece based on the magnetic force generated or lost when the circuit is turned on or off, thus achieving automatic circuit switching without manual operation. Manual switches are completely operated by humans to control the circuit, thereby achieving control of circuit equipment, and are the most common and widely used switches.

[0003] With the development of industrial technology, more and more electrically driven equipment has entered factories, and most of them use high-voltage electricity as an energy supply. However, when cutting off and closing high-voltage electricity, operators are prone to contact hazards, which can easily lead to work-related accidents. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology by proposing a multi-bar linkage limit switch, which facilitates the cutting off and closing of high voltage electricity, while avoiding the electric arc generated when the high voltage electricity is closed, which could injure the operator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Design a multi-bar linkage limit switch, including a mounting plate. Three rotating shafts are evenly arranged on the front side of the mounting plate. One end of each of the three rotating shafts has a meshing transmission gear fitted on its outer side. The other end of each of the three rotating shafts passes through the outer side of the mounting plate and is fitted with a swing rod. An insulating protective cover is provided on the front side of the mounting plate, and a transmission shaft is provided on the front side of the insulating protective cover. A knob is fitted on the outer side of one end of the transmission shaft, and a transmission insert is connected to the other end of the transmission shaft through the insulating protective cover. A transmission slot matching the transmission insert is opened at one end of the rotating shaft opposite to the transmission shaft. Guide sleeves are evenly arranged on the rear side of the mounting plate, and insulating push rods are inserted into the guide sleeves. Moving wire sleeves are provided at the upper ends of the three insulating push rods. Insulating blocks are evenly arranged on the rear side of the mounting plate, and a stationary wire post matching the moving wire sleeve is clamped on one side of each insulating block. A transmission link is provided between the swing rod and the insulating push rod via a hinge. A mounting box is provided on the rear side of the mounting plate, and a wire through hole is opened on one side of the mounting box.

[0007] Preferably, a first sealing cover is fitted on the outer side of the stationary terminal block, and an insulating cylinder is provided on the lower surface of the first sealing cover; a second sealing cover is provided at the lower end of the insulating cylinder; the upper end of the moving terminal sleeve passes through the second sealing cover; a rubber sealing sleeve is embedded at the contact point between the second sealing cover and the moving terminal sleeve.

[0008] Preferably, the lower end of the second sealing cover is provided with a first insulating sleeve, and an ejector spring is provided inside the first insulating sleeve; the lower end of the ejector spring is provided with a second insulating sleeve that matches the moving wire sleeve, and a limiting sleeve is provided on the outer side of the second insulating sleeve; the limiting sleeve is threadedly connected to the outer side of the first insulating sleeve.

[0009] Preferably, the outer side of the stationary terminal is fitted with an insulating sleeve, and the lower end of the insulating sleeve is provided with a conical groove; the upper end of the moving terminal sleeve is provided with a conical clamp that matches the insulating sleeve.

[0010] Preferably, the mounting plate has a mounting sleeve that matches the rotating shaft on its rear side, and a mounting through hole is provided on the outer side of the mounting sleeve; a positioning rod is provided in the mounting through hole, and a tightening spring is provided on the side of the positioning rod away from the mounting through hole; a threaded plug is provided on one side of the tightening spring, and the threaded plug is threadedly connected to the mounting sleeve; a positioning groove that matches the positioning rod is provided on the outer side of the rotating shaft.

[0011] Preferably, a guide block is provided at the contact point between the insulating protective cover and the drive shaft; a track groove matching the guide block is provided on the outer side of the drive shaft.

[0012] The multi-bar linkage limit switch proposed in this invention has the following advantages:

[0013] 1. The swing arm is driven to rotate by the rotating shaft, and then the insulated push rod is driven to move up and down by the transmission link, so as to prevent people from being injured by electric shock when opening and closing electrical switches.

[0014] 2. By installing an insulating sleeve at the insertion point between the moving terminal sleeve and the stationary terminal, the electric arc generated when the moving terminal sleeve and the stationary terminal are inserted is blocked, thereby preventing the operator from being injured by the electric arc.

[0015] 3. By using a guide block installed at the through hole of the drive shaft, and by using a track groove on the outside of the drive shaft that matches the guide block, the alignment of the drive rod and the drive slot is facilitated. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of a multi-bar linkage limit switch proposed in this invention;

[0017] Figure 2 This is a schematic diagram of the left-side structure of a multi-bar linkage limit switch proposed in this invention;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure at point A in a multi-bar linkage limit switch proposed in this invention;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure at point B in a multi-bar linkage limit switch proposed in this invention;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure at point C in a multi-bar linkage limit switch proposed in this invention;

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure at point D in a multi-bar linkage limit switch proposed in this invention;

[0022] Figure 7 This is an enlarged structural diagram of part E in a multi-bar linkage limit switch proposed in this invention;

[0023] Figure 8 This is a three-dimensional structural diagram of the transmission shaft in a multi-bar linkage limit switch proposed in this invention.

[0024] In the diagram: 1. Mounting plate; 2. Rotary shaft; 3. Transmission gear; 4. Swing rod; 5. Insulating protective cover; 6. Transmission shaft; 7. Knob; 8. Transmission rod; 9. Guide sleeve; 10. Insulating push rod; 11. Moving wire sleeve; 12. Insulating block; 13. Stationary wire post; 14. Transmission connecting rod; 15. Mounting box; 16. First sealing cover; 17. Insulating cylinder; 18. Second sealing cover; 19. Rubber sealing sleeve; 20. First insulating sleeve; 21. Ejection spring; 22. Second insulating sleeve; 23. Limiting sleeve; 24. Insulating stop sleeve; 25. Conical clamp; 26. Mounting sleeve; 27. Positioning rod; 28. Tightening spring; 29. ​​Threaded plug; 30. Guide block; 31. Track groove. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Reference Figure 1-8A multi-bar linkage limit switch includes a mounting plate 1. Three rotating shafts 2 are evenly arranged on the front side of the mounting plate 1. One end of each of the three rotating shafts 2 is fitted with a meshing transmission gear 3. The other end of each rotating shaft 2 passes through the outer side of the mounting plate 1 and is fitted with a swing rod 4. An insulating protective cover 5 is provided on the front side of the mounting plate 1. A transmission shaft 6 is provided on the front side of the insulating protective cover 5. A knob 7 is fitted on the outer side of one end of the transmission shaft 6. The other end of the transmission shaft 6 passes through the insulating protective cover 5 and is connected to a transmission insert 8. One end of the rotating shaft 2 opposite to the transmission shaft 6 has a transmission slot that matches the transmission insert 8. A guide block 30 is provided at the contact point between the insulating protective cover 5 and the transmission shaft 6. A track groove 31 matching the guide block 30 is provided on the outer side of the transmission shaft 6. The transmission insert 8 is connected to the transmission slot through a plug-in engagement, making the connection between the transmission shaft 6 and the rotating shaft 2 more convenient and preventing operation by non-operators. The guide block 30 and track groove 31 also facilitate the alignment of the transmission insert 8 with the transmission slot.

[0027] Guide sleeves 9 are evenly arranged on the rear side of the mounting plate 1. Insulating push rods 10 are inserted into the guide sleeves 9. Moving wire sleeves 11 are provided at the upper ends of the three insulating push rods 10. Insulating blocks 12 are evenly arranged on the rear side of the mounting plate 1. A stationary wire post 13 matching the moving wire sleeve 11 is clamped on one side of the insulating block 12. A first sealing cover plate 16 is sleeved on the outside of the stationary wire post 13. An insulating cylinder 17 is provided on the lower surface of the first sealing cover plate 16. A second sealing cover plate 18 is provided at the lower end of the insulating cylinder 17. The upper end of the moving wire sleeve 11 passes through the second sealing cover plate 18. A rubber sealing sleeve 19 is embedded at the contact point between the second sealing cover plate 18 and the moving wire sleeve 11. The insulating cylinder 17 blocks the electric arc generated when the moving wire sleeve 11 and the stationary wire post 13 are inserted, thereby preventing the electric arc from injuring the operator.

[0028] A transmission link 14 is provided between the swing rod 4 and the insulating push rod 10 via a hinge. A mounting box 15 is provided on the rear side of the mounting plate 1. A wire through hole is provided on one side of the mounting box 15. The swing rod 4 is driven to rotate by the rotating shaft 2, and the insulating push rod 10 is moved up and down along the guide sleeve 9 by the transmission link 14.

[0029] The lower end of the second sealing cover plate 18 is provided with a first insulating sleeve 20, and a push-out spring 21 is provided inside the first insulating sleeve 20. The lower end of the push-out spring 21 is provided with a second insulating sleeve 22 that matches the moving wire sleeve 11. A limiting sleeve 23 is sleeved on the outside of the second insulating sleeve 22. The limiting sleeve 23 is threadedly connected to the outside of the first insulating sleeve 20. The second insulating sleeve 22 is pushed down by the elastic force of the push-out spring 21, so that the second insulating sleeve 22 moves with the moving wire sleeve 11 up and down, thereby providing insulation protection for the part of the moving wire sleeve 11 that slides out of the insulating cylinder 17.

[0030] An insulating sleeve 24 is fitted on the outer side of the stationary terminal 13. The lower end of the insulating sleeve 24 is provided with a conical groove. The upper end of the moving terminal sleeve 11 is provided with a conical clamp 25 that matches the insulating sleeve 24. When the moving terminal sleeve 11 moves toward the stationary terminal 13, the moving terminal sleeve 11 causes the conical clamp 25 to press against the insulating sleeve 24, thereby clamping and fixing the stationary terminal 13 with the conical clamp 25, making the fixing of the stationary terminal 13 after it is inserted into the moving terminal sleeve 11 more stable.

[0031] The mounting plate 1 has a mounting sleeve 26 that matches the rotating shaft 2 on its rear side. The mounting sleeve 26 has a mounting through hole on its outer side. A positioning rod 27 is installed in the mounting through hole. A clamping spring 28 is installed on the side of the positioning rod 27 away from the mounting through hole. A threaded plug 29 is installed on the side of the clamping spring 28. The threaded plug 29 is threadedly connected to the mounting sleeve 26. A positioning groove that matches the positioning rod 27 is installed on the outer side of the rotating shaft 2. The clamping spring 28 pushes the positioning rod 27 towards the rotating shaft 2. At the same time, the positioning action between the positioning rod 27 and the positioning groove limits the rotation angle of the rotating shaft 2.

[0032] Working principle: When the switch is closed, the guide block 30 and the track groove 31 guide each other, so that the transmission rod 8 connected to one end of the transmission shaft 6 is aligned with the transmission slot. Then, the knob 7 is turned, so that the transmission shaft 6 drives the transmission rod 8 to drive the rotating shaft 2 to rotate. The meshing transmission between the transmission gears 3 makes the three rotating shafts 2 rotate at the same time, so that the rotating shaft 2 drives the swing rod 4 to rotate upward. Through the transmission link 14, the insulating push rod 10 moves along the direction of the guide sleeve 9, so that the insulating push rod 10 pushes the moving wire sleeve 11 to slide upward, so that the moving wire sleeve 11 and the stationary wire post 13 are inserted. The insulating cylinder 17 blocks the electric arc generated when the moving wire sleeve 11 and the stationary wire post 13 are inserted, so as to avoid the electric arc injuring the operator. Then, the moving wire sleeve 11 drives the conical clamp 25 to press against the insulating retainer 24, so that the conical clamp 25 clamps and fixes the stationary wire post 13, so that the stationary wire post 13 and the moving wire sleeve 11 are more stable after being inserted.

[0033] When the switch is turned off, the knob 7 is turned in the opposite direction, causing the drive shaft 6 to rotate in the opposite direction. This causes the three shafts 2 to rotate in the opposite direction, and the transmission rod 14 causes the insulating push rod 10 to move downward. This causes the insulating push rod 10 to engage and disengage the moving terminal sleeve 11 from the stationary terminal post 13, thereby cutting off the high voltage. At the same time, the spring force of the push spring 21 pushes the second insulating sleeve 22 downward, causing the second insulating sleeve 22 to move with the moving terminal sleeve 11 as it moves up and down. This provides insulation protection for the part of the moving terminal sleeve 11 that slides out of the insulating cylinder 17.

[0034] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-bar linkage limit switch, comprising a mounting plate (1), characterized in that, The mounting plate (1) is uniformly provided with rotating shafts (2) on its front side. Each of the three rotating shafts (2) has a meshing transmission gear (3) fitted on the outer side of one end. The other end of the three rotating shafts (2) passes through the outer side of the mounting plate (1) and is fitted with a swing rod (4). The mounting plate (1) is provided with an insulating protective cover (5) on its front side. The insulating protective cover (5) is provided with a transmission shaft (6) on its front side. A knob (7) is fitted on the outer side of one end of the transmission shaft (6). The other end of the transmission shaft (6) passes through the insulating protective cover (5) and is connected to a transmission rod (8). The rotating shaft (2) opposite to the transmission shaft (6) has a transmission rod that matches the transmission rod (8) at one end. Slots; guide sleeves (9) are evenly arranged on the rear side of the mounting plate (1), and insulating push rods (10) are inserted inside the guide sleeves (9); moving wire sleeves (11) are provided at the upper ends of the three insulating push rods (10); insulating blocks (12) are evenly arranged on the rear side of the mounting plate (1), and a stationary wire post (13) matching the moving wire sleeve (11) is clamped on one side of the insulating block (12); a transmission link (14) is provided between the swing rod (4) and the insulating push rod (10) by means of a hinge; a mounting box (15) is provided on the rear side of the mounting plate (1), and a wire through hole is opened on one side of the mounting box (15).

2. The multi-bar linkage limit switch according to claim 1, characterized in that, The stationary terminal (13) is fitted with a first sealing cover plate (16) on its outer side, and an insulating cylinder (17) is provided on the lower surface of the first sealing cover plate (16); a second sealing cover plate (18) is provided at the lower end of the insulating cylinder (17); the upper end of the moving terminal sleeve (11) passes through the second sealing cover plate (18); a rubber sealing sleeve (19) is embedded at the contact point between the second sealing cover plate (18) and the moving terminal sleeve (11).

3. The multi-bar linkage limit switch according to claim 2, characterized in that, The lower end of the second sealing cover (18) is provided with a first insulating sleeve (20), and the first insulating sleeve (20) is provided with an ejector spring (21); the lower end of the ejector spring (21) is provided with a second insulating sleeve (22) that matches the moving wire sleeve (11), and a limiting sleeve (23) is provided on the outside of the second insulating sleeve (22); the limiting sleeve (23) is threadedly connected to the outside of the first insulating sleeve (20).

4. The multi-bar linkage limit switch according to claim 1, characterized in that, An insulating sleeve (24) is fitted on the outside of the stationary terminal (13), and a conical groove is provided at the lower end of the insulating sleeve (24); a conical clamp (25) matching the insulating sleeve (24) is provided at the upper end of the moving terminal sleeve (11).

5. The multi-bar linkage limit switch according to claim 1, characterized in that, The mounting plate (1) is provided with a mounting sleeve (26) that matches the rotating shaft (2) on the rear side. The mounting sleeve (26) has a mounting through hole on the outer side. A positioning rod (27) is provided in the mounting through hole. A tightening spring (28) is provided on the side of the positioning rod (27) away from the mounting through hole. A threaded plug (29) is provided on one side of the tightening spring (28). The threaded plug (29) is threadedly connected to the mounting sleeve (26). A positioning groove that matches the positioning rod (27) is provided on the outer side of the rotating shaft (2).

6. The multi-bar linkage limit switch according to claim 1, characterized in that, A guide block (30) is provided at the contact point between the insulating protective cover (5) and the drive shaft (6); a track groove (31) matching the guide block (30) is provided on the outer side of the drive shaft (6).

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