High-performance clamping piece type auxiliary switch

Abstract

A high-performance clamping piece type auxiliary switch belongs to the technical field of auxiliary switches. The front mounting plate, the front cover plate, the plurality of same base plate units, the rear cover plate and the rear mounting plate are sequentially connected through long countersunk screws, the driving shaft simultaneously penetrates through the middle parts of the front mounting plate, the front cover plate, the base plate units, the rear cover plate and the rear mounting plate, and each base plate unit comprises an upper base plate and a lower base plate which are the same; each substrate is provided with two movable contact pieces, two static contact pieces and a shaft gasket, a magnetic block mounting groove is formed in the middle of each substrate, a magnetic block is arranged in the magnetic block mounting groove of the upper substrate of each substrate unit, and the four movable contact pieces and the two shaft gaskets of each substrate unit are riveted together through brass rivets. According to the utility model, the through-current capability and the on-off instant stability of the contact can be effectively improved, the magnetic blow-out function and the 360-degree time sequence switching capability are high-efficiency, and the accurate indication function is also realized.

Description

Technical Field

[0001] This utility model belongs to the field of auxiliary switch technology, and specifically relates to a high-performance clip-on auxiliary switch. Background Technology

[0002] The working principle of a conventional clip-on auxiliary switch is that two phosphor bronze springs are riveted together to form a moving contact clip. The moving contact clip holds two brass stationary contacts at both ends to achieve contact connection. Different on / off angles and timing sequences can be achieved by changing the stationary contacts of different angles and models.

[0003] However, conventional clip-on auxiliary switches have the following drawbacks: insufficient current carrying capacity and high contact resistance; overly simple structural design with insufficient limiting at key dimensions, making it easy for vibrations during switching to trigger bounce signals, leading to misjudgments by the customer's intelligent system; lack of reserved magnetic blowout arc extinguishing function; insufficient structural design flexibility, typically only allowing timing switching within 90° without changing the product size, limiting the practical application range of the switch; and the existing angle indication function is too vague, failing to effectively indicate the user's angle accuracy. Utility Model Content

[0004] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a high-performance clip-on auxiliary switch. This invention effectively improves the current-carrying capacity of the contacts and the instantaneous stability of switching, has a highly efficient magnetic blow function and 360° timing switching capability, and also has a precise indication function.

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

[0006] This utility model provides a high-performance clip-on auxiliary switch, comprising a front mounting plate, a front cover plate, multiple identical base plate units, a rear cover plate, and a rear mounting plate connected sequentially by countersunk long screws, and a drive shaft passing through the middle of the front mounting plate, the front cover plate, the base plate units, the rear cover plate, and the rear mounting plate. The drive shaft is a square shaft, and its end is connected to a square hole in the end bushing in the middle of the rear mounting plate. Both the front cover plate and the rear cover plate are connected to external hexagonal bolts. The heads of the external hexagonal bolts are correspondingly recessed into the hexagonal countersunk holes of the front cover plate and the rear cover plate, and the threaded shanks of the external hexagonal bolts pass through the through holes of the front mounting plate and the rear mounting plate and are exposed outside the front mounting plate and the rear mounting plate. The key feature is that each base plate unit includes two identical base plates, and each base plate is equipped with two moving contacts and two... Each substrate has a stationary contact piece and a shaft washer. Each substrate has a limiting groove for mounting the stationary contact piece and a magnetic block mounting groove in the middle of the substrate. A magnetic block is installed in the magnetic block mounting groove of the upper substrate in each substrate unit. The magnetic block is installed near the outer arc position of the crescent portion of the stationary contact piece. The four moving contact pieces and two shaft washers of each substrate unit are riveted together by brass rivets. The four moving contact pieces sandwich the two shaft washers placed opposite each other in the middle and are located in the central circular hole of the substrate. After riveting, the inner small truncated cones of the two shaft washers fit tightly together, and the distance between the outer large truncated cones of the two is greater than the depth of the central circular hole of the substrate. The center of the moving contact piece is a serrated circular hole, which cooperates with the insulating bushing sleeve on the outside of the drive shaft. The moving contact piece can rotate 360° inside the substrate unit under the drive of the drive shaft.

[0007] Furthermore, the front mounting plate has an opening / closing position indicator near the center hole, and an indicator sleeve is provided between the front mounting plate and the front cover plate. A small truncated cone on the upper part of the indicator sleeve extends from the center hole of the front mounting plate. A square hole that mates with the drive shaft is provided in the middle of the indicator sleeve. The drive shaft drives the indicator sleeve to rotate. The upper surface of the indicator sleeve is provided with an indicator scale line that mates with the opening / closing position indicator.

[0008] Furthermore, the bottom side of the indicator bushing is concave, and a pin groove is provided on the concave surface. A cylindrical pin that mates with the pin groove is inserted into the drive shaft. After the indicator bushing is fitted onto the drive shaft, the cylindrical pin sinks into the pin groove.

[0009] Furthermore, a flat washer is provided in the recess of the indicator bushing, which presses against the inner surface of the indicator bushing to prevent the cylindrical pin from coming out of the pin groove.

[0010] Furthermore, the sum of the thickness of the lower frustum of the indicator bushing and the thickness of the flat washer is less than the depth of the central hole of the front cover plate.

[0011] Furthermore, the front cover plate has a notch on its side, and an angle indicator is provided at the notch. The side surface of the indicator bushing is provided with an angle scale line corresponding to the rotation angle precision indicator.

[0012] Furthermore, the front cover is provided with a matching transparent dustproof block at the opening.

[0013] Furthermore, the distance between the outer frustums of the two shaft washers minus the depth of the central circular hole of the substrate is 0.05-0.1 mm.

[0014] Furthermore, the material of the moving contact piece is C194 iron-copper.

[0015] Furthermore, the magnetic block is installed at a position 2.05-2.25mm away from the outer side of the crescent portion of the stationary contact piece.

[0016] The beneficial effects of this utility model.

[0017] This invention effectively improves the current-carrying capacity of the contacts; optimizes the limiting structure to enhance the instantaneous stability of the contact opening and closing, thereby eliminating the occurrence of abnormal bouncing signals; the new structural design incorporates an efficient magnetic blow function within a limited space; without increasing the volume of conventional clip-on auxiliary switches, it has a 360° seamless timing switching capability; and it incorporates a precise rotation angle indication function to effectively indicate the accuracy of the position angle. Attached Figure Description

[0018] To make the technical problems solved, the technical solutions, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Figure 1 This is a schematic diagram of the overall exploded structure of this utility model.

[0020] Figure 2 This is an exploded structural diagram of a substrate unit of this utility model.

[0021] Figure 3 This is a structural schematic diagram of the indicator bushing of this utility model.

[0022] Figure 4 This is a schematic diagram of the overall structure of this utility model after installation.

[0023] Figure 5 This is a schematic diagram of the overall side view structure of this utility model.

[0024] Figure 6 This is a schematic diagram of the overall top view structure of this utility model.

[0025] The markings in the diagram are as follows: 1 is a countersunk long screw, 2 is a front mounting plate, 3 is a front cover plate, 4 is a base plate unit, 5 is a rear cover plate, 6 is a rear mounting plate, 7 is a drive shaft, 8 is an external hex bolt, 9 is a base plate, 10 is a moving contact piece, 11 is a stationary contact piece, 12 is a shaft washer, 13 is a limit groove, 14 is a magnetic block mounting groove, 15 is a magnetic block, 16 is a crescent-shaped part, 17 is a brass rivet, 18 is an insulating bushing, 19 is an opening / closing position indicator, 20 is an indicator bushing, 21 is an indicator scale line, 22 is a pin groove, 23 is a cylindrical pin, 24 is a flat washer, 25 is a notch, 26 is an angle indicator mark, 27 is an angle scale line, 28 is a transparent dustproof block, and 29 is an end bushing. Detailed Implementation

[0026] As shown in the accompanying drawings, this embodiment provides a high-performance clip-on auxiliary switch, including a front mounting plate 2, a front cover plate 3, multiple identical base plate units 4, a rear cover plate 5, and a rear mounting plate 6 connected in sequence by countersunk long screws 1, and a drive shaft 7 passing through the middle of the front mounting plate 2, the front cover plate 3, the base plate units 4, the rear cover plate 5, and the rear mounting plate 6. The drive shaft 7 is a square shaft, and the end of the drive shaft 7 is connected to the square hole of the end bushing 29 in the middle of the rear mounting plate 6, driving the end bushing 29 to rotate.

[0027] Both the front cover plate 3 and the rear cover plate 5 are connected with external hex bolts 8. The heads of the external hex bolts 8 are recessed into the hexagonal countersunk holes of the front cover plate 3 and the rear cover plate 5, and the threaded rods of the external hex bolts 8 pass through the through holes of the front mounting plate 2 and the rear mounting plate 6 and are exposed outside the front mounting plate 2 and the rear mounting plate 6, for the installation and fixing of the hand parts.

[0028] The above are all standard configurations for existing clip-on type auxiliary switches.

[0029] Each substrate unit 4 includes two identical substrates 9, one on top and one on the bottom. Each substrate 9 is equipped with two moving contacts 10, two stationary contacts 11, and one shaft washer 12. That is, each substrate unit 4 has a total of four moving contacts 10, four stationary contacts 11, and two shaft washer 12.

[0030] Each substrate 9 is provided with a limiting groove 13 for mounting a stationary contact piece 11. The stationary contact piece 11 is made of brass, which is consistent with the existing stationary contact piece 11 material and has high conductivity. The stationary contact piece 11 is divided into various models, and the difference between the models lies in the length of the crescent part 16, according to the actual on / off angle requirements.

[0031] Furthermore, a magnetic block mounting groove 14 is provided in the middle of the substrate 9. Each substrate unit 4 is provided with a magnetic block 15 in the magnetic block mounting groove 14 of the substrate 9 above to realize the magnetic blowing function. The magnetic block 15 is installed at a position 2.05-2.25mm away from the outer side of the crescent part 16 of the stationary contact piece 11, which ensures the effectiveness of the magnetic blowing function.

[0032] The four moving contacts 10 and two shaft washers 12 of each substrate unit 4 are riveted together by brass rivets 17. The four moving contacts 10 sandwich the two shaft washers 12 placed opposite each other in the middle and are located in the central circular hole of the substrate 9. The moving contacts 10 are made of C194 iron copper. Without affecting the cost and mechanical performance, the conductivity of the parts is increased by 3 times, which effectively improves the current carrying capacity of the contacts.

[0033] After riveting, the inner small truncated cones of the two shaft washers 12 fit tightly together, and the distance between the outer large truncated cones of the two is greater than the depth of the central circular hole of the substrate 9. The value of the distance between the outer large truncated cones of the two shaft washers 12 minus the depth of the central circular hole of the substrate 9 is 0.05-0.1mm. This design greatly reduces the probability of bouncing signals caused by excessive vibration amplitude of the contact piece at the moment of contact switching.

[0034] The moving contact 10 has a serrated circular hole at its center. An insulating sleeve 18 is fitted on the outside of the drive shaft 7 to prevent the drive shaft 7 from short-circuiting and becoming energized. The serrated circular hole at the center of the moving contact 10 cooperates with the insulating sleeve 18 fitted on the outside of the drive shaft 7. The moving contact 10 can rotate 360° inside the base plate unit 4 under the drive of the drive shaft 7. By adjusting the angle of the crescent portion of the two identical stationary contacts 11, the connection and disconnection at any angle can be achieved, realizing a 360° time-series switching function without dead angles.

[0035] The front mounting plate 2 has a switch position indicator 19 near the center hole, indicating the on and off points of the switch. This indicator is designed according to the user's actual on / off sequence; that is, the switch position indicator 19 on the front mounting plate 2 needs to be redesigned based on the actual on / off positions of each project. An indicator sleeve 20 is provided between the front mounting plate 2 and the front cover plate 3. A small truncated cone on the upper part of the indicator sleeve 20 extends from the center hole of the front mounting plate 2. The upper surface of the indicator sleeve 20 has indicator scale lines 21 that mate with the switch position indicator 19. The indicator scale lines 21 are used to indicate closing and opening of the switch.

[0036] The indicator sleeve 20 has a square hole in the middle that mates with the drive shaft 7, and the drive shaft 7 drives the indicator sleeve 20 to rotate.

[0037] The bottom side of the indicator sleeve 20 is recessed, and a pin groove 22 is provided on the recessed surface. A cylindrical pin 23 that mates with the pin groove 22 is inserted into the drive shaft 7. After the indicator sleeve 20 is fitted onto the drive shaft 7, the cylindrical pin 23 sinks into the pin groove 22. Since there is a risk of tilting when the cylindrical pin 23 machined on the drive shaft 7 is fitted into the hole, the depth of the pin groove 22 of the indicator sleeve 20 is slightly larger than the diameter of the cylindrical pin 23, so that the cylindrical pin 23 is completely sunk into the pin groove 22, eliminating the structural fit risk caused by the tilting of the drive shaft 7 during machining. A flat washer 24 is provided in the recessed part of the indicator sleeve 20. The flat washer 24 presses against the inner surface of the indicator sleeve 20 to prevent the cylindrical pin 23 from coming out of the pin groove 22.

[0038] Furthermore, the sum of the thickness of the lower frustum of the indicator bushing 20 and the thickness of the flat washer 24 is less than the depth of the center hole of the front cover plate 3, so that the front mounting plate 2 and the front cover plate 3 can fit tightly together, thus realizing the axial limiting function of the drive shaft 7.

[0039] A notch 25 is provided on the side of the front cover plate 3, and an angle indicator mark 26 is provided at the notch 25. An angle scale line 27 corresponding to the precise rotation angle indicator mark is provided on the side surface of the indicator sleeve 20. Considering that some users may install this auxiliary switch on a flat plate during installation, the hole in the middle of the flat plate may be relatively small and may block the opening and closing position mark 19 on the front mounting plate 2. In this case, the angle indicator mark 26 on the front cover plate 3 is used to provide a rough angle indication.

[0040] To prevent foreign objects from entering the switch, the front cover 3 has a matching transparent dustproof block 28 at the notch 25. The transparent material will not affect the observation of the scale lines.

[0041] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A high-performance clip-on auxiliary switch, comprising a front mounting plate (2), a front cover plate (3), a plurality of identical base plate units (4), a rear cover plate (5), and a rear mounting plate (6) connected sequentially by countersunk long screws (1), and a drive shaft (7) passing through the middle of the front mounting plate (2), the front cover plate (3), the base plate units (4), the rear cover plate (5), and the rear mounting plate (6), wherein the drive shaft (7) is a square shaft, and the end of the drive shaft (7) is connected to the rear cover plate (6). The square hole of the end bushing (29) in the middle of the mounting plate (6) is connected. Both the front cover plate (3) and the rear cover plate (5) are connected with external hexagonal bolts (8). The heads of the external hexagonal bolts (8) are correspondingly recessed into the hexagonal countersunk holes of the front cover plate (3) and the rear cover plate (5). The threaded rods of the external hexagonal bolts (8) pass through the through holes of the front mounting plate (2) and the rear mounting plate (6) and are exposed outside the front mounting plate (2) and the rear mounting plate (6). The characteristic of this design is that... Each substrate unit (4) includes two identical substrates (9) on the top and bottom. Each substrate (9) is equipped with two moving contacts (10), two stationary contacts (11), and a shaft washer (12). Each substrate (9) is provided with a limiting groove (13) for mounting the stationary contacts (11), and a magnetic block mounting groove (14) is provided in the middle of the substrate (9). A magnetic block (15) is provided in the magnetic block mounting groove (14) of the upper substrate (9) of each substrate unit (4). The magnetic block (15) is installed near the outer arc position of the crescent part (16) of the stationary contact (11). The four movable contacts (10), two stationary contacts (11), and one shaft washer (12) of each substrate unit (4) are provided with a magnetic block (15). The movable contact (10) and the two shaft washers (12) are riveted together by brass rivets (17). The four movable contact pieces (10) sandwich the two shaft washers (12) placed opposite each other in the middle and are located in the central circular hole of the substrate (9). After riveting, the inner small truncated cones of the two shaft washers (12) fit tightly together, and the distance between the outer large truncated cones of the two is greater than the depth of the central circular hole of the substrate (9). The center of the movable contact piece (10) is a serrated circular hole, which cooperates with the insulating bushing (18) sleeved on the outside of the drive shaft (7). The movable contact piece (10) can rotate 360° inside the substrate unit (4) under the drive of the drive shaft (7).

2. The high-performance clip-on auxiliary switch according to claim 1, characterized in that, The front mounting plate (2) has a circuit breaker position indicator (19) near the center hole. An indicator sleeve (20) is provided between the front mounting plate (2) and the front cover plate (3). The small truncated cone on the upper part of the indicator sleeve (20) extends out from the center hole of the front mounting plate (2). The middle part of the indicator sleeve (20) has a square hole that cooperates with the drive shaft (7). The drive shaft (7) drives the indicator sleeve (20) to rotate. The upper surface of the indicator sleeve (20) has an indicator scale line (21) that cooperates with the circuit breaker position indicator (19).

3. A high-performance clip-on auxiliary switch according to claim 2, characterized in that, The bottom side of the indicator bushing (20) is concave, and a pin groove (22) is provided on the concave surface. A cylindrical pin (23) that cooperates with the pin groove (22) is inserted into the drive shaft (7). After the indicator bushing (20) is fitted onto the drive shaft (7), the cylindrical pin (23) sinks into the pin groove (22).

4. A high-performance clip-on auxiliary switch according to claim 3, characterized in that, A flat washer (24) is provided in the inner recess of the indicator bushing (20). The flat washer (24) presses against the inner surface of the indicator bushing (20) to prevent the cylindrical pin (23) from coming out of the pin groove (22).

5. A high-performance clip-on auxiliary switch according to claim 4, characterized in that, The sum of the thickness of the lower frustum of the indicator bushing (20) and the thickness of the flat washer (24) is less than the depth of the central hole of the front cover plate (3).

6. A high-performance clip-on auxiliary switch according to claim 2, characterized in that, The front cover plate (3) has a notch (25) on its side, and an angle indicator mark (26) is provided at the notch (25). The side surface of the indicator sleeve (20) is provided with an angle scale line (27) corresponding to the angle indicator mark (26).

7. A high-performance clip-on auxiliary switch according to claim 6, characterized in that, The front cover plate (3) is provided with a matching transparent dustproof block (28) at the opening (25).

8. A high-performance clip-on auxiliary switch according to claim 1, characterized in that, The distance between the outer frustums of the two shaft washers (12) minus the depth of the central hole of the substrate (9) is 0.05-0.1 mm.

9. A high-performance clip-on auxiliary switch according to claim 1, characterized in that, The material of the moving contact piece (10) is C194 iron copper.

10. A high-performance clip-on auxiliary switch according to claim 1, characterized in that, The magnetic block (15) is installed at a position 2.05-2.25 mm away from the outer side of the crescent portion (16) of the stationary contact piece (11).

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