Adjustable circuit breaker

Abstract

An adjustable circuit breaker comprises a shell, a traction rod, three sets of bimetallic strips, three sets of armatures, a transmission rod, a mounting base assembly and an adjusting piece assembly, the mounting base assembly comprises a first mounting base, a first mounting cover plate, a second mounting base and a second mounting cover plate, and the first mounting base and the second mounting base are inserted into the shell; the adjusting assembly comprises an adjusting rod, a first rotary knob and a second rotary knob, the adjusting rod is transversely and slidably connected to the traction rod and provided with an adjusting plate, the front end face of the adjusting plate is arranged to be a stepped slope, the first rotary knob is installed on the first installation cover plate, and the second rotary knob is installed on the second installation cover plate. A sliding driving structure is arranged among the first knob, the traction rod and the adjusting rod, the second knob is installed on the second installation cover plate, and a rotation driving structure is arranged between the second knob and the transmission rod. The tripping mechanism has the advantages of reasonable structural design, convenience in assembly, reliable action, long service life, adjustable tripping and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an adjustable circuit breaker. Background Art

[0002] Traditional thermal magnetic releases mainly achieve overload protection and short-circuit protection through the cooperation of bimetallic strips and armatures. When the circuit is overloaded, the bimetallic strips are deformed by heat, which drives the operating mechanism to disconnect the circuit; when the circuit is short-circuited, the electromagnet of the thermal magnetic release generates magnetic force to adsorb the armature, so that the armature releases the main contact through the transmission mechanism after being adsorbed, which plays the role of power-off protection. However, in actual production and use, depending on the required scenarios, it is sometimes necessary to delay the tripping so that the circuit breaker can be separated, and the tripping time of existing molded case circuit breakers is usually specific, and the actual tripping cannot be adjusted. Sometimes it is necessary to adjust the tripping action current to achieve functions such as graded protection, while the tripping action current of existing molded case circuit breakers is usually specific (set), and the actual tripping needs cannot be adjusted. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide an adjustable circuit breaker with adjustable tripping, reasonable structural design and convenient installation.

[0004] The utility model solves the technical problem by adopting a technical solution, which is an adjustable circuit breaker, including a housing, a first mounting bracket, a traction rod, three groups of bimetallic strips, three groups of armatures, a transmission rod, a mounting seat assembly, and an adjusting member assembly, wherein the bimetallic strip is provided with a first adjusting screw, the armature is limitedly rotated and arranged on a second mounting bracket of a static contact, a spring may be connected between the armature and the transmission rod, the mounting seat assembly includes a first mounting seat and a first mounting cover plate, and a second mounting seat and a second mounting cover plate, and the upper ends of the first mounting seat and the second mounting seat are respectively provided with a first mounting portion, a first mounting portion, and a second mounting portion. Two mounting parts, the first mounting cover plate and the second mounting cover plate are used to limit the rotation of the transmission rod to the first mounting part and the second mounting part, the adjustment component includes an adjustment rod, a first knob, and a second knob, the adjustment rod is laterally slidably connected to the traction rod and is provided with an adjustment plate opposite to the first adjusting screw, the first mounting cover plate is penetrated with the first knob, a sliding drive structure is provided between the first knob, the traction rod and the adjustment rod, the second mounting cover plate is penetrated with the second knob, and a rotation drive structure is provided between the second knob and the transmission rod.

[0005] The advantages of adopting the above technical solution are as follows: by rotating the first knob, under the action of the sliding drive structure, the first knob drives the adjusting rod to move horizontally relative to the traction rod, so that the distance between the adjusting plate on the adjusting rod and the first adjusting screw on the bimetallic strip is changed; when the spring is installed between the transmission rod and the armature, by rotating the second knob, under the action of the rotating drive structure, the second knob drives the transmission rod to rotate axially, so that the spring tension is changed; therefore, the arrangement of the first adjusting component and the second adjusting component can better achieve the purpose of adjustable circuit breaker tripping according to customer needs; the first mounting seat and the second mounting seat are separated into The modular structure helps to save installation space, and injection molding is more reasonable. At the same time, a U-shaped first mounting portion and a second mounting portion are arranged on the first mounting seat and the second mounting seat. After matching the first mounting cover plate and the second mounting cover plate, the position of the transmission rod and the shell can be better limited, which is not easy to swing and is also convenient to install. An assembly structure in which the first knob and the second knob are respectively installed on the first mounting cover plate and the second mounting cover plate is adopted, which greatly improves the functionality of the first knob and the second knob. Therefore, the above-mentioned circuit breaker has the advantages of reasonable structural design, convenient assembly, reliable operation, long service life, adjustable tripping, etc.

[0006] Furthermore, the sliding drive structure includes a first mounting groove portion and a first driving protrusion, and a second mounting groove portion and a second driving protrusion, the first mounting groove portion is provided with two and is formed laterally on both ends of the traction rod, the first driving protrusion is formed correspondingly on the rear end surface of the adjustment plate, the first driving protrusions are respectively inserted into the corresponding first mounting groove portions, the adjustment rod is formed with a first connecting arm at the corresponding position of the front end surface, the second mounting groove portion is formed on the first connecting arm, the second driving protrusion is formed on the bottom of the first knob and is an eccentric structure, and the second driving protrusion is inserted into the second mounting groove portion.

[0007] The advantages of adopting the above technical solution are as follows: when in use, the first knob is rotated under force, and the second driving protrusion of the bottom eccentric structure rotates synchronously and, with the cooperation of the second mounting groove, generates a force for lateral movement of the adjusting rod, and then the first driving protrusion cooperates with the first mounting groove to realize the lateral sliding of the adjusting rod on the traction rod, thereby achieving the purpose of adjusting the position of the stepped inclined surface on the front end surface of the adjusting plate, and the spacing between the first adjusting screw and the stepped inclined surface on the bimetallic strip can be changed, so that users can adjust the thermal tripping time according to their needs, so that the product has a wide range of adaptability, and the first mounting groove and the first driving part are set as two, so that the movement of the adjusting rod is smoother and the overall structural design is reasonable.

[0008] Furthermore, a first clamp is installed on the upper circumferential wall surface of the first knob, a first mounting protrusion is formed on the lower circumferential wall surface of the first knob, a first supporting plate is installed on the first mounting protrusion and the second driving protrusion is formed at the bottom thereof, a first limiting protrusion is also provided at the bottom of the first mounting cover plate, the first limiting protrusion is arranged on the outer side of the first mounting protrusion, and a first cam structure is also provided on the first mounting protrusion to cooperate with the first limiting protrusion to form a rotation limit for the first knob.

[0009] The advantages of adopting the above technical solution are as follows: through the arrangement of the first clamp and the first supporting plate, the rotation of the first knob on the first mounting cover plate is realized. The arrangement of the first mounting protrusion can make the installation of the first supporting plate more stable. At the same time, through the cooperation of the first cam structure on the first mounting protrusion and the first limiting protrusion on the first mounting cover plate, the rotation angle of the first knob is limited, thereby avoiding excessive rotation of the first knob and causing the first driving protrusion to escape from the first mounting groove. It is safer to use and has a reasonable structural design.

[0010] Furthermore, the rotation drive structure includes a third driving protrusion and a transmission protrusion, the third driving protrusion is provided with a spiral structure, and the transmission protrusion is arranged on the transmission rod to cooperate with the third driving protrusion to drive the transmission rod to rotate.

[0011] The advantages of adopting the above technical solution are as follows: when in use, as the second knob rotates, the third driving protrusion rotates synchronously. During the rotation process, the spiral structure on the third driving protrusion drives the transmission rod to rotate by cooperating with the transmission protrusion, thereby realizing the adjustment of the spring tension, so that users can adjust the thermal trip time according to their needs, making the product have a wide range of adaptability.

[0012] Furthermore, a second clamp is installed on the upper circumferential wall surface of the second knob, a second mounting protrusion is formed on the lower circumferential wall surface of the second knob above the third driving protrusion, a second supporting sheet is installed on the second mounting protrusion, and a second limiting protrusion is also provided on the bottom of the second mounting cover plate, the second limiting protrusion is arranged on the outer side of the second mounting protrusion, and a second cam structure is also provided on the second mounting protrusion to cooperate with the second limiting protrusion to form a rotation limit for the second knob.

[0013] The advantages of adopting the above technical solution are: through the arrangement of the second clamp and the second support plate, the rotation of the second knob on the second mounting cover plate is realized, and the arrangement of the second mounting protrusion can make the installation of the second support plate more stable. At the same time, through the cooperation of the second cam structure on the second mounting protrusion and the second limiting protrusion on the second mounting cover plate, the rotation angle of the second knob is limited, thereby avoiding excessive rotation of the second knob, making it safer to use and having a reasonable structural design.

[0014] Furthermore, the armature is provided with a first arm, the transmission rod is provided with a second arm, the second mounting bracket is provided with a third arm, one end of the spring can be fixed to the first arm, and the other end of the spring is fixed to the second arm or the third arm.

[0015] Advantages of the above technical solution: by setting the first arm, the second arm and the third arm, the spring can be quickly installed and fixed. At the same time, during the assembly process, the installation position of the other end of the spring can be adjusted according to customer needs, making the product adaptable to a wide range.

[0016] Furthermore, the armature is provided with a fourth arm, and the fourth arm is used to push the traction rod. The second mounting bracket is also provided with a limiting arm, and the limiting arm cooperates with the fourth arm and is provided with a second adjusting screw.

[0017] The advantages of adopting the above technical solution are: the setting of the fourth arm enables the armature to better push the traction rod, and the setting of the limit arm prevents the spring from causing the armature to rotate erroneously during the process of adjusting the rotation angle of the transmission rod, thereby ensuring the reliability of the adjustment. At the same time, by setting the second adjusting screw, the adjustment range of the spring tension is increased, making the product have a wide range of adaptability.

[0018] Furthermore, the transmission rod is provided with a pair of positioning protruding rings, which cooperate with the first mounting portion and the second mounting portion to form axial positioning of the transmission rod, and a core shaft is also provided at the center of the transmission rod.

[0019] The advantages of adopting the above technical solution are as follows: the paired positioning convex rings will form an installation space on the transmission rod that matches the first installation part and the second installation part. During installation, as long as the first installation part and the second installation part are aligned with the corresponding installation space, the transmission rod will not change its axial position after installation. Therefore, there is no need to set up an additional installation structure in the shell. The installation is simple and convenient. The setting of the core shaft ensures the consistency of the strength of the transmission rod, and the service life of the transmission rod will be longer.

[0020] Furthermore, an indication structure is provided between the first knob, the second knob and the shell, and the indication structure includes an arrow groove and an indication mark, the arrow groove is connected to one end of the corresponding driving groove, and the indication mark is provided on the upper surface of the shell.

[0021] The advantages of adopting the above technical solution are as follows: when the first knob and the second knob are rotated to adjust the gear position, by observing that the arrow groove points to a certain indicator mark, the adjustment gear position of the first knob and the second knob can be clearly known. The observation is clear and has the effect of reminder and indication, ensuring the safe and reliable use of the product.

[0022] Furthermore, a first plug post and a first slot that match each other are provided between the first mounting seat and the shell, and a second plug post and a second slot that match each other are provided between the second mounting seat and the shell.

[0023] The advantages of adopting the above technical solution are as follows: through the cooperation of the first plug post and the first slot, and the second plug post and the second slot, the first mounting seat and the second mounting seat are positioned in the shell, and the installation is convenient and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial structure diagram of the utility model Figure 1 ;

[0025] Figure 2 It is a partial structure diagram of the utility model Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the adjustment rod of the utility model;

[0027] Figure 4 It is a schematic diagram of the matching structure of the armature and the second mounting bracket of the utility model;

[0028] Figure 5 It is a schematic diagram of the transmission rod structure of the utility model;

[0029] Figure 6 The first mounting seat structure of the utility model is schematically shown in FIG. Figure 1 ;

[0030] Figure 7 The first mounting seat structure of the utility model is schematically shown in FIG. Figure 2 ;

[0031] Figure 8 This is a schematic diagram of the first mounting cover structure of the utility model;

[0032] Fig. 9 The second mounting seat structure of the utility model is schematically shown in FIG. Figure 1 ;

[0033] Fig.10 The second mounting seat structure of the utility model is schematically shown in FIG. Figure 2 ;

[0034] Fig.11 This is a schematic diagram of the second installation cover structure of the utility model;

[0035] Fig.12 It is a partial structure diagram of the utility model Figure 3 ;

[0036] Fig.13 It is a partial structure diagram of the utility model Figure 4 ;

[0037] Fig.14 for Fig.13 Schematic diagram of the bottom structure of the second knob;

[0038] Fig.15 It is a schematic diagram of the shell structure of the utility model.

[0039] In the figure: 1-housing, 2-first mounting bracket, 3-traction rod, 4-bimetallic sheet, 5-armature, 6-transmission rod, 7-first adjusting screw, 8-second mounting bracket, 9-spring, 10-first mounting seat, 11-first mounting cover plate, 12-second mounting seat, 13-second mounting cover plate, 14-first mounting portion, 15-second mounting portion, 16-adjusting rod, 17-first knob, 18-second knob, 19-adjusting plate, 20-first mounting groove portion, 21-first driving protrusion, 22-second mounting groove portion, 23-second driving protrusion, 24 -first clamp, 25-first mounting protrusion, 26-first support plate, 27-first limiting protrusion, 28-third driving protrusion, 29-transmission protrusion, 30-second clamp, 31-second mounting protrusion, 32-second support plate, 33-second limiting protrusion, 34-first support arm, 35-second support arm, 36-third support arm, 37-fourth support arm, 38-limiting support arm, 39-second adjusting screw, 40-positioning convex ring, 41-core shaft, 42-arrow groove, 43-first plug column, 44-first slot, 45-second plug column, 46-second slot. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the utility model and / or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In addition, the orientation only represents the relative position relationship between the components, not the absolute position relationship.

[0041] See also Figures 1 to 15 As shown, an adjustable circuit breaker includes a housing 1, a first mounting bracket 2, a traction rod 3, three groups of bimetallic strips 4, three groups of armatures 5, a transmission rod 6, a mounting seat assembly, and an adjusting member assembly. The first mounting bracket 2 is fixed in the housing 1, and the traction rod 3 is rotatably arranged on the first mounting bracket 2. The bimetallic strip 4 and the armature 5 are arranged corresponding to the static contact in the housing 1. A first adjusting screw 7 is arranged on the bimetallic strip 4. The armature 5 is limitedly rotated on the second mounting bracket 8 of the static contact. A spring 9 can be connected between the armature 5 and the transmission rod 6. The mounting seat assembly includes a first mounting seat 10 and a first mounting cover plate 11, as well as a second mounting seat 12 and a second mounting cover plate 13. The first mounting seat 10 and the second mounting seat 12 are inserted into the housing 1 in a side-by-side manner and are spaced apart in a transverse manner. The upper ends are respectively provided with a U-shaped first mounting portion 14 and a second mounting portion 15. The first mounting cover plate 11 and the second mounting cover plate 13 are screwed to the corresponding first mounting seat 10 and the second mounting seat 12, and The transmission rod 6 is limited to rotating on the first mounting portion 14 and the second mounting portion 15. It should be noted that the U-shaped first mounting portion 14 and the U-shaped second mounting portion 15 are both U-shaped mounting grooves opening upward, and the U-shaped mounting grooves will cooperate with the transmission rod 6. The adjustment assembly includes an adjustment rod 16, a first knob 17, and a second knob 18. The adjustment rod 16 is laterally slidably connected to the traction rod 3 and is provided with an adjustment plate 19 opposite to the first adjustment screw 7 on the bimetallic strip 4. The front end surface of the adjustment plate 19 is set as a stepped inclined surface. More specifically, the stepped inclined surface is formed with four gears that cooperate with the first adjustment screw 7. The front end of the first mounting cover plate 11 is provided with the above-mentioned first knob 17 on the outer side of the first mounting portion 14, and a sliding drive structure is provided between the first knob 17, the traction rod 3 and the adjustment rod 16. The front end of the second mounting cover plate 13 is provided with the above-mentioned second knob 18 on the outer side of the second mounting portion 15, and a rotation drive structure is provided between the second knob 18 and the transmission rod 6.

[0042] In the above structure, by rotating the first knob 17, under the action of the sliding drive structure, the first knob 17 drives the adjusting rod 16 to move laterally relative to the traction rod 3, so that the distance between the adjusting plate 19 on the adjusting rod 16 and the first adjusting screw 7 on the bimetallic strip 4 is changed. When the spring 9 is installed between the transmission rod 6 and the armature 5, by rotating the second knob 18, under the action of the rotating drive structure, the second knob 18 drives the transmission rod 6 to rotate axially, so that the tension of the spring 9 is changed. Therefore, the arrangement of the first adjustment component and the second adjustment component can better achieve the purpose of adjustable circuit breaker tripping according to customer needs, and the first mounting seat 10 and the second mounting seat 12 are separated. The modular structure helps to save installation space, and injection molding is more reasonable. At the same time, a U-shaped first mounting portion 14 and a second mounting portion 15 are arranged on the first mounting seat 10 and the second mounting seat 12. After matching the first mounting cover plate 11 and the second mounting cover plate 13, the position of the transmission rod 6 on the housing 1 can be better limited, and it is not easy to swing and is also convenient to install. An assembly structure is also adopted in which the first knob 17 and the second knob 18 are respectively installed on the first mounting cover plate 11 and the second mounting cover plate 13, which greatly improves the functionality of the first knob 17 and the second knob 18. Therefore, the above-mentioned circuit breaker has the advantages of reasonable structural design, convenient assembly, reliable operation, long service life, and adjustable tripping.

[0043] In this embodiment, the sliding drive structure includes a first mounting groove portion 20 and a first driving protrusion 21, as well as a second mounting groove portion 22 and a second driving protrusion 23. The first mounting groove portion 20 is provided with two and is formed transversely on both ends of the traction rod 3. The first mounting groove portion 20 is a strip groove formed through, and the first driving protrusion 21 is correspondingly formed on the rear end surface of the adjustment plate 19. The first driving protrusion 21 is a convex column. The first driving protrusions 21 are respectively inserted into the corresponding first mounting groove portions 20. The adjustment rod 16 is formed with a first connecting arm at a corresponding position on the front end surface. The second mounting groove portion 22 is formed on the first connecting arm. The second driving protrusion 23 is formed on the bottom of the first knob 17 and has an eccentric structure. The second driving protrusion 23 is also a convex column. The second driving protrusion 23 is inserted into On the second mounting groove portion 22, when in use, the first knob 17 is forced to rotate, and the second driving protrusion 23 of the bottom eccentric structure rotates synchronously and, with the cooperation of the second mounting groove portion 22, generates a force for lateral movement of the adjusting rod 16, and then through the cooperation of the first driving protrusion 21 and the first mounting groove portion 20, the lateral sliding of the adjusting rod 16 on the traction rod 3 can be achieved, thereby achieving the purpose of adjusting the position of the stepped inclined surface on the front end surface of the adjusting plate 19, and the spacing between the first adjusting screw 7 and the stepped inclined surface on the bimetallic strip 4 can be changed, so that users can adjust the thermal tripping time according to their needs, so that the product has a wide adaptation range, and the first mounting groove portion 20 and the first driving protrusion 21 are set as two, so that the movement of the adjusting rod 16 is smoother and the overall structural design is reasonable.

[0044] In this embodiment, each first driving protrusion 21 is provided with a limiting flange, the diameter of the limiting flange is greater than the width of the first mounting groove 20, and the limiting flange of the first driving protrusion 21 conflicts with the rear end of the traction rod 3, wherein the limiting flange is integrally arranged with the first driving protrusion 21, and the traction rod 3 is provided with mounting holes at the corresponding three first mounting grooves 20, respectively, the diameter of the mounting holes is greater than the diameter of the limiting flange, and the mounting holes are connected with the corresponding first mounting grooves 20, and the limiting flange can prevent the adjustment rod 16 from separating from the traction rod 3 when sliding, and this structure of the molded case circuit breaker The device can make the adjustment rod 16 slide more smoothly and improve its sensitivity when it is released, and can also prevent the adjustment rod 16 from separating from the traction rod 3 when sliding. Since the limiting flange is integrally arranged with the first driving protrusion 21, the limiting flange can be passed from the mounting hole to the rear end of the traction rod 3 through the mounting hole, and then the first driving protrusion 21 can be pushed to slide into the first mounting groove 20, which makes the installation more convenient. Of course, the limiting flange can also be separately arranged from the first driving protrusion 21, such as by adopting a threaded connection, a snap connection, etc., so that there is no need to set a mounting hole.

[0045] In this embodiment, a first clamp 24 is installed on the upper peripheral wall surface of the first knob 17, a first mounting protrusion 25 is formed on the lower peripheral wall surface of the first knob 17, a first supporting piece 26 is installed on the first mounting protrusion 25, and a second driving protrusion 25 is formed at the bottom thereof, the first supporting piece 26 can be a disc spring piece, and a first limiting protrusion 27 is also provided at the bottom of the first mounting cover plate 11, and the first limiting protrusion 27 is arranged on the outer side of the first mounting protrusion 25, and a first cam structure is also provided on the first mounting protrusion 25 to cooperate with the first limiting protrusion 27 to form a rotation of the first knob 17. Dynamic limit, through the arrangement of the first clamp 24 and the first supporting piece 26, the rotation of the first knob 17 on the first mounting cover plate 11 is realized. The arrangement of the first mounting protrusion 25 can make the installation of the first supporting piece 26 more stable. At the same time, through the cooperation of the first cam structure on the first mounting protrusion 25 and the first limiting protrusion 27 on the first mounting cover plate 11, the rotation angle of the first knob 17 is limited, and excessive rotation of the first knob 17 is avoided, so that the first driving protrusion 21 is prevented from escaping from the first mounting groove 20. It is safer to use and has a reasonable structural design.

[0046] In this embodiment, the rotation drive structure includes a third drive protrusion 28 and a transmission protrusion 29. The third drive protrusion 28 is provided with a spiral structure. The transmission protrusion 29 is provided on the transmission rod 6 to cooperate with the third drive protrusion 28 to drive the transmission rod 6 to rotate. When in use, as the second knob 18 rotates, the third drive protrusion 28 rotates synchronously. During the rotation process, the spiral structure on the third drive protrusion 28 drives the transmission rod 6 to rotate by cooperating with the transmission protrusion 29, thereby realizing the adjustment of the tension of the spring 9, so that users can adjust the thermal trip time according to their needs, making the product have a wide range of adaptability.

[0047] In this embodiment, a second clamp 30 is installed on the upper peripheral wall surface of the second knob 18, and a second mounting protrusion 31 is formed on the lower peripheral wall surface of the second knob 18 above the third driving protrusion 28. A second supporting sheet 32 ​​is installed on the second mounting protrusion 31, and the second supporting sheet 32 ​​can also be a disc spring sheet. A second limiting protrusion 33 is also provided at the bottom of the second mounting cover plate 13. The second limiting protrusion 33 is arranged on the outer side of the second mounting protrusion 31, and a second cam structure is also provided on the second mounting protrusion 31 to cooperate with the second limiting protrusion 33. The second knob 18 is limited in rotation. The second clamp 30 and the second support sheet 32 ​​are provided to realize the rotation of the second knob 18 on the second mounting cover plate 13. The second mounting protrusion 31 can make the installation of the second support sheet 32 ​​more stable. At the same time, the second cam structure on the second mounting protrusion 31 cooperates with the second limiting protrusion 33 on the second mounting cover plate 13 to limit the rotation angle of the second knob 18, thereby avoiding excessive rotation of the second knob 18, making it safer to use and having a reasonable structural design.

[0048] In this embodiment, a first arm 34 is provided on the armature 5, a second arm 35 is provided on the transmission rod 6, and a third arm 36 is provided on the second mounting bracket 8. One end of the spring 9 is fixed to the first arm 34, and the other end of the spring 9 is fixed to the second arm 35 or the third arm 36. By setting the first arm 34, the second arm 35 and the third arm 36, the spring 9 can be quickly installed and fixed. At the same time, during the assembly process, the installation position of the other end of the spring 9 can be adjusted according to customer needs, so that the product has a wide range of adaptation. More specifically, when the customer needs to adjust the tension of the spring 9, the other end of the spring 9 is fixed to the second arm 35. Conversely, the other end of the spring 9 can be fixed to the third arm 36.

[0049] In this embodiment, a fourth arm 37 is further provided on the armature 5, and the fourth arm 37 is used to push the traction rod 3. A limiting arm 38 is also provided on the second mounting bracket 8. The limiting arm 38 cooperates with the fourth arm 37 and is provided with a second adjusting screw 39. The setting of the fourth arm 37 enables the armature 5 to better push the traction rod 3. The setting of the limiting arm 38, during the process of adjusting the rotation angle of the transmission rod 6, the spring 9 will not cause the armature 5 to rotate erroneously, thereby ensuring the reliability of the adjustment. At the same time, by setting the second adjusting screw 39, the adjustment range of the tension of the spring 9 is increased, so that the product has a wide range of adaptability.

[0050] In this embodiment, the transmission rod 6 is also provided with a pair of positioning convex rings 40, which cooperate with the first mounting portion 14 and the second mounting portion 15 to form axial positioning of the transmission rod 6. A core shaft 41 is also provided at the center of the transmission rod 6. The pair of positioning convex rings 40 will form an installation space on the transmission rod 6 to cooperate with the first mounting portion 14 and the second mounting portion 15. During installation, as long as the first mounting portion 14 and the second mounting portion 15 are aligned with the corresponding installation space, the transmission rod 6 will not change its axial position after being installed in place. Therefore, there is no need to set an additional installation structure in the shell 1. The installation is simple and convenient. The setting of the core shaft 41 ensures the consistency of the strength of the transmission rod 6, and the service life of the transmission rod 6 will be longer.

[0051] In this embodiment, an indication structure is further provided between the first knob 17, the second knob 18 and the shell 1, and the indication structure includes an arrow groove 42 and an indication mark. The arrow groove 42 is connected to one end of the corresponding driving groove, and the indication mark is provided on the upper surface of the shell 1. When the first knob 17 and the second knob 18 are rotated to adjust the gear position, by observing that the arrow groove 42 points to a certain indication mark, the adjustment position of the first knob 17 and the second knob 18 can be clearly known. The observation is clear and has the effect of a reminder and indication, thereby ensuring the safe and reliable use of the product.

[0052] In this embodiment, a matching first pin 43 and a first slot 44 are provided between the first mounting seat 10 and the shell 1, and a matching second pin 45 and a second slot 46 are provided between the second mounting seat 12 and the shell 1, wherein the first pin 43 and the second pin 45 are respectively formed on the first mounting seat 10 and the second mounting seat 12, and the first slot 44 and the second slot 46 are formed on the shell 1. Through the cooperation of the first pin 43 and the first slot 44, and the second pin 45 and the second slot 46, the positioning of the first mounting seat 10 and the second mounting seat 12 in the shell 1 is achieved, and the installation is convenient and accurate. More specifically, the bottom of the first mounting seat 10 and the second mounting seat 12 also has a threaded mounting hole.

[0053] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An adjustable circuit breaker, comprising a housing (1), a first mounting bracket (2), a traction rod (3), three groups of bimetallic strips (4), three groups of armatures (5), a transmission rod (6), a mounting seat assembly, and an adjusting member assembly, wherein the bimetallic strips (4) are provided with a first adjusting screw (7), the armature (5) is limitedly rotatably arranged on a second mounting bracket (8) of a stationary contact, a spring (9) may be connected between the armature (5) and the transmission rod (6), and characterized in that: The mounting seat assembly comprises a first mounting seat (10) and a first mounting cover plate (11), and a second mounting seat (12) and a second mounting cover plate (13); the upper ends of the first mounting seat (10) and the second mounting seat (12) are respectively provided with a first mounting portion (14) and a second mounting portion (15); the first mounting cover plate (11) and the second mounting cover plate (13) are used to limit the rotation of the transmission rod (6) on the first mounting portion (14) and the second mounting portion (15); the adjustment assembly comprises an adjustment rod (16), a first knob (1 7), and a second knob (18), the adjusting rod (16) is slidably connected to the traction rod (3) in a transverse direction and is provided with an adjusting plate (19) opposite to the first adjusting screw (7), the first mounting cover plate (11) is provided with the first knob (17), a sliding drive structure is provided between the first knob (17), the traction rod (3) and the adjusting rod (16), the second mounting cover plate (13) is provided with the second knob (18), and a rotation drive structure is provided between the second knob (18) and the transmission rod (6).

2. An adjustable circuit breaker according to claim 1, characterized in that: The sliding drive structure comprises a first mounting groove (20) and a first driving protrusion (21), and a second mounting groove (22) and a second driving protrusion (23); the first mounting groove (20) is provided with two and is formed transversely on both ends of the traction rod (3); the first driving protrusion (21) is formed correspondingly on the rear end surface of the adjustment plate (19); the first driving protrusion (21) is respectively inserted into the corresponding first mounting groove (20); the adjustment rod (16) is formed with a first connecting arm at a corresponding position on the front end surface; the second mounting groove (22) is formed on the first connecting arm; the second driving protrusion (23) is formed on the bottom of the first knob (17) and is an eccentric structure; the second driving protrusion (23) is inserted into the second mounting groove (22).

3. An adjustable circuit breaker according to claim 2, characterized in that: A first clamp (24) is mounted on the upper peripheral wall surface of the first knob (17), a first mounting protrusion (25) is formed on the lower peripheral wall surface of the first knob (17), a first supporting sheet (26) is mounted on the first mounting protrusion (25) and a second driving protrusion (23) is formed on the bottom of the first mounting protrusion (25), a first limiting protrusion (27) is further provided at the bottom of the first mounting cover plate (11), the first limiting protrusion (27) is arranged on the outer side of the first mounting protrusion (25), a first cam structure is further provided on the first mounting protrusion (25), and the first cam structure cooperates with the first limiting protrusion (27) to form a rotation limit for the first knob (17).

4. The adjustable circuit breaker according to claim 1, characterized in that: The rotation drive structure comprises a third driving protrusion (28) and a transmission protrusion (29); the third driving protrusion (28) is provided with a spiral structure; the transmission protrusion (29) is provided on the transmission rod (6); the transmission protrusion (29) cooperates with the third driving protrusion (28) to drive the transmission rod (6) to rotate.

5. An adjustable circuit breaker according to claim 4, characterized in that: A second clamp (30) is mounted on the upper peripheral wall surface of the second knob (18); a second mounting protrusion (31) is formed on the lower peripheral wall surface of the second knob (18) above the third driving protrusion (28); a second supporting sheet (32) is mounted on the second mounting protrusion (31); a second limiting protrusion (33) is also disposed at the bottom of the second mounting cover plate (13); the second limiting protrusion (33) is disposed on the outer side of the second mounting protrusion (31); a second cam structure is also disposed on the second mounting protrusion (31); the second cam structure cooperates with the second limiting protrusion (33) to limit the rotation of the second knob (18).

6. The adjustable circuit breaker according to claim 1, characterized in that: The armature (5) is provided with a first support arm (34), the transmission rod (6) is provided with a second support arm (35), the second mounting bracket (8) is provided with a third support arm (36), one end of the spring (9) is fixed to the first support arm (34), and the other end of the spring (9) is fixed to the second support arm (35) or the third support arm (36).

7. The adjustable circuit breaker according to claim 1, characterized in that: The armature (5) is also provided with a fourth support arm (37), the fourth support arm (37) being used to push the traction rod (3), and the second mounting bracket (8) is also provided with a limit support arm (38), the limit support arm (38) being matched with the fourth support arm (37) and provided with a second adjusting screw (39).

8. The adjustable circuit breaker according to claim 1, characterized in that: The transmission rod (6) is also provided with a pair of positioning protruding rings (40), the positioning protruding rings (40) cooperate with the first mounting portion (14) and the second mounting portion (15) to form axial positioning for the transmission rod (6), and a core shaft (41) is also provided at the center of the transmission rod (6).

9. The adjustable circuit breaker according to claim 1, characterized in that: An indication structure is also provided between the first knob (17), the second knob (18) and the housing (1), the indication structure comprising an arrow groove (42) and an indication mark, the arrow groove (42) being connected to one end of a corresponding driving groove, and the indication mark being provided on the upper surface of the housing (1).

10. The adjustable circuit breaker according to claim 1, characterized in that: A first plug post (43) and a first slot (44) that match each other are provided between the first mounting seat (10) and the shell (1), and a second plug post (45) and a second slot (46) that match each other are provided between the second mounting seat (12) and the shell (1).

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