Power system and circuit breaker

Abstract

The utility model provides a power system and a circuit breaker, and relates to the technical field of low-voltage apparatuses, the power system comprises a driving mechanism and a speed reducing mechanism, the speed reducing mechanism comprises a planet wheel set, one end of the planet wheel set is connected with the driving mechanism, and the other end of the planet wheel set is used for power output; the planet wheel set comprises a planet carrier and a plurality of groups of combined wheels arranged on the planet carrier, each group of combined wheels comprises a wheel A and a wheel B which are coaxially arranged, and the radial diameter of the wheel A is not equal to that of the wheel B. The transmission ratio can be effectively increased through the arrangement of the planetary gear set, so that the overall structure is more compact, the occupied space is small, overall modular design can be achieved, integrated installation is facilitated, and the size of a power system is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a power system and a circuit breaker. Background Art

[0002] Circuit breakers are common switching devices that can close, carry and interrupt currents under normal circuit conditions and close, carry and interrupt currents under abnormal circuit conditions within a specified time. Circuit breakers generally control the operating mechanism through the power system, and then drive the contact system to achieve opening and closing. At present, the power system of circuit breakers mostly adopts a spur gear set or a worm gear and spur gear combination. This method has a dispersed structure, resulting in a large volume occupied by the power system, affecting the modular design and integrated installation of the product, and is not conducive to expanding the scope of use of the product. Utility Model Content

[0003] The purpose of the present application is to provide a power system and a circuit breaker to address the deficiencies in the above-mentioned prior art, which can simplify the structure of the power system and facilitate modular and integrated installation of the product.

[0004] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0005] According to one aspect of an embodiment of the present application, a power system is provided, including a driving mechanism and a reduction mechanism, the reduction mechanism including a planetary gear set, one end of the planetary gear set being connected to the driving mechanism and the other end being used for power output; the planetary gear set including a planetary carrier and a plurality of groups of combined wheels arranged on the planetary carrier, each group of the combined wheels including a coaxially arranged wheel A and a wheel B, the radial diameter of the wheel A being unequal to the radial diameter of the wheel B.

[0006] Optionally, the driving mechanism and the planetary gear set are meshedly connected via an input wheel, the input wheel is provided with a meshing gear shaft, the input wheel extends between the multiple B wheels of the planetary gear set, and meshes with the multiple B wheels via the meshing gear shaft.

[0007] Optionally, the A wheel and the B wheel are fixedly connected or integrally arranged; the number of teeth of the A wheel is an integer multiple of the number of teeth of the input wheel, and the number of teeth of the B wheel is an integer multiple of the number of teeth of the A wheel.

[0008] Optionally, the reduction mechanism further includes a fixed wheel and an upper cover that cooperate with each other, the fixed wheel is connected to the driving mechanism, a cavity is formed between the fixed wheel and the upper cover, the input wheel and the planetary gear set are located in the cavity; the A wheel of the planetary gear set is meshed with the fixed wheel, and the output end of the planetary gear set extends out of the cavity.

[0009] Optionally, a first meshing tooth is formed on the inner circumferential wall of the fixed wheel for meshing with the A wheel of the planetary gear set.

[0010] Optionally, the fixed wheel and the driving mechanism are positioned and connected; a first positioning hole and at least one positioning column are provided on one end of the fixed wheel facing the driving mechanism, and an output shaft boss and at least one second positioning hole are provided on one end of the driving mechanism facing the fixed wheel, the first positioning hole is used to cooperate with the output shaft boss, and the positioning column is used to connect with the second positioning hole.

[0011] Optionally, a plurality of connecting shafts are provided on one side of the planetary carrier, and the A wheel and the B wheel of the same group are coaxially arranged on the corresponding connecting shafts; the output end of the planetary gear group is arranged on the other side of the planetary carrier, and the plurality of connecting shafts are not coaxially arranged with the output end.

[0012] Optionally, the fixing wheel and the upper cover are snap-fitted;

[0013] At least one snap-fitting groove is provided on the fixed wheel to snap-fit ​​with the snap-fitting groove provided on the upper cover;

[0014] Optionally, at least one positioning rib is provided on the fixed wheel to cooperate with a positioning groove provided on the upper cover.

[0015] Another aspect of an embodiment of the present application provides a circuit breaker, including a shell, in which the above-mentioned power system, operating mechanism, handle and contact system are arranged, the output end of the power system is connected to the handle, and the handle is connected to the contact system through the operating mechanism.

[0016] The beneficial effects of this application include:

[0017] The present application provides a power system and a circuit breaker, which are provided with a planetary gear set, one end of which is connected to a driving mechanism to transmit power, and the other end is used to output power; the planetary gear set includes a planetary frame for support, and the planetary frame has multiple sets of coaxially arranged A wheels and B wheels, and the radial sizes of A wheels and B wheels are different. The setting of the planetary gear set can effectively increase the transmission ratio, and the planetary gear set occupies a small space, can realize modular design, is convenient for integrated installation, and is conducive to effectively reducing the volume of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a power system provided in an embodiment of the present application;

[0020] Figure 2 An exploded schematic diagram of a power system provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of an exploded structure of a planetary gear set of a power system provided in an embodiment of the present application;

[0022] Figure 4 One of the partial structural schematic diagrams of a power system provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of an input wheel of a power system provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the structure of a driving mechanism of a power system provided in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of the coordination between an input wheel and a planetary gear set of a power system provided in an embodiment of the present application;

[0026] Figure 8 A second schematic diagram of a partial structure of a power system provided in an embodiment of the present application;

[0027] Fig. 9 One of the fixed wheel structure schematic diagrams of a power system provided in an embodiment of the present application;

[0028] Fig.10 A second schematic diagram of a fixed wheel structure of a power system provided in an embodiment of the present application;

[0029] Fig.11 A schematic diagram of an upper cover structure of a power system provided in an embodiment of the present application;

[0030] Fig.12 A schematic diagram of the coordination of a fixed wheel and an upper cover of a power system provided in an embodiment of the present application;

[0031] Fig.13 A schematic diagram of a circuit breaker structure provided in an embodiment of the present application.

[0032] Icons: 10-power system; 11-driving mechanism; 110-output shaft; 111-output shaft boss; 112-second positioning hole; 12-fixed wheel; 120-engaging teeth; 121-positioning ribs; 122-clamping grooves; 123-first positioning holes; 124-positioning columns; 13-input wheels; 131-engaging gear shafts; 132-mounting holes; 14-planetary gear sets; 141-A wheel; 142-B wheel; 143-planet carrier; 143a-output end; 143b-connecting shaft; 15-upper cover; 151-positioning grooves; 152-buckles; 20-handle; 21-operating mechanism; 22-contact system. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In one aspect of the embodiment of the present application, referring to Figure 1 , Figure 2 , a power system 10 is provided, including a driving mechanism 11 and a reduction mechanism, the reduction mechanism including a planetary gear set 14, one end of the planetary gear set 14 is connected to the driving mechanism 11, and the other end is used for power output; the planetary gear set 14 includes a planetary carrier 143, and a plurality of groups of combined wheels arranged on the planetary carrier 143, each group of combined wheels includes a coaxially arranged A wheel 141 and a B wheel 142, and the radial diameter of the A wheel 141 is not equal to the radial diameter of the B wheel 142.

[0040] The driving mechanism 11 is used to provide driving force. For example, in the present application, the driving mechanism 11 can be a motor; the reduction mechanism includes a planetary gear set 14, and the driving mechanism 11 outputs power through the planetary gear set 14; the setting of the planetary gear set 14 can increase the transmission ratio and occupy a small space.

[0041] The planetary gear set 14 includes a planetary carrier 143, on which are disposed a plurality of A wheels 141 and a plurality of B wheels 142. The plurality of A wheels 141 are coplanar, and the plurality of B wheels 142 are coplanar. The A wheels 141 and the B wheels 142 form two layers and correspond one to one. The corresponding A wheels 141 and B wheels 142 are coaxially disposed to form a group of combined wheels.

[0042] A plurality of connecting shafts 143b are provided on one side of the planetary carrier 143, and the A wheel 141 and the B wheel 142 of the same group are coaxially arranged on the corresponding connecting shafts 143b; the output end 143a of the planetary gear set 14 is arranged on the other side of the planetary carrier 143, and the plurality of connecting shafts 143b are not coaxially arranged with the output end 143a.

[0043] For example, Figure 3 As shown, the planetary gear set 14 of the present application has three A wheels 141 and three B wheels 142, and three connecting shafts 143b are set on one side of the planetary carrier 143 of the same group, and each connecting shaft 143b coaxially passes through the A wheel 141 and the B wheel 142 of the same group; an output end 143a is formed on the other side of the planetary carrier 143, and the output end 143a serves as the power output of the planetary gear set 14.

[0044] For example, meshing teeth 120 are formed on the output end 143 a of the planetary gear set 14 to transmit power through meshing transmission.

[0045] The A wheel 141 and the B wheel 142 are fixedly connected or integrally arranged so that the A wheel 141 and the B wheel 142 of the same group rotate synchronously.

[0046] Therefore, the power system 10 provided in the embodiment of the present application is provided with a planetary gear set 14, one end of the planetary gear set 14 is connected to the driving mechanism 11 to transmit power, and the other end is used to output power; the planetary gear set 14 includes a planetary frame 143 for support, and the planetary frame 143 has multiple sets of coaxially arranged A wheels 141 and B wheels 142, and the radial sizes of the A wheels 141 and the B wheels 142 are different. The setting of the planetary gear set 14 can effectively increase the transmission ratio, make the overall structure more compact, occupy less space, realize overall modular design, facilitate integrated installation, and help effectively reduce the volume of the power system 10 and the demand for miniaturization.

[0047] Specifically, the driving mechanism 11 and the corresponding planetary gear set 14 are meshedly connected via the input wheel 13 , the number of teeth of the A wheel 141 is an integer multiple of the number of teeth of the input wheel 13 , and the number of teeth of the B wheel 142 is an integer multiple of the number of teeth of the A wheel 141 .

[0048] like Figure 4 , Figure 5 As shown, an input wheel 13 is arranged between the driving mechanism 11 and the planetary gear set 14, and a mounting hole 132 is formed at one end of the input wheel 13 facing the driving mechanism 11, for fixedly matching with the output shaft 110 of the driving mechanism 11; for example, the mounting hole 132 of the input wheel 13 in the present application is a D-shaped hole, Figure 6 The output shaft 110 of the driving mechanism 11 is adapted to be a D-shaped shaft; of course, it can also be adapted to other shapes.

[0049] The input wheel 13 is provided with a meshing gear shaft 131 . The input wheel 13 extends between a plurality of B wheels 142 of the planetary gear set 14 connected to the driving mechanism 11 , and meshes with the plurality of B wheels 142 via the meshing gear shaft 131 .

[0050] like Figure 7 As shown, a meshing gear shaft 131 is formed at one end of the input wheel 13 facing the planetary gear set 14 , and the meshing gear shaft 131 extends into the multiple B wheels 142 of the planetary gear set 14 to mesh with each other.

[0051] In the present application, the planetary gear set 14 has three A wheels 141 and three B wheels 142, and the meshing gear shaft 131 extends between the three B wheels 142 of the planetary gear set 14. The meshing gear shaft 131 meshes with the outer teeth of the three B wheels 142 at the same time to drive the three B wheels 142 of the planetary gear set 14 to rotate, thereby driving the planetary gear set 14 to rotate.

[0052] The present application sets the number of teeth of the A wheel 141 to be an integer multiple of the number of teeth of the meshing gear shaft 131 of the input wheel 13 , and the number of teeth of the B wheel 142 to be an integer multiple of the number of teeth of the A wheel 141 , so that the planetary gear set 14 can be assembled at will, reducing the difficulty of production and improving production efficiency.

[0053] The reduction mechanism also includes a fixed wheel 12 and an upper cover 15 that cooperate with each other. The fixed wheel 12 is connected to the driving mechanism 11. A cavity is formed between the fixed wheel 12 and the upper cover 15. The input wheel 13 and the planetary gear set 14 are located in the cavity. The A wheel 141 of the planetary gear set 14.1 is meshed with the fixed wheel 12, and the output end 143a of the planetary gear set 14.2 extends out of the upper cover 15 for power output.

[0054] Refer to Figure 8 , the A wheel 141 of the planetary gear set 14.1 is located inside the fixed wheel 12, Fig. 9 A circle of meshing teeth 120 is formed on the inner circumferential wall of the fixed wheel 12, which is used to mesh with the A wheel 141 of the planetary gear set 14.1; the B wheel 142 of the planetary gear set 14.2 is located at Fig.12 The output end 143a extends out of the upper cover 15. The upper cover 15 and the fixed wheel 12 are both fixed and do not rotate.

[0055] like Fig.10 As shown, a first positioning hole 123 and at least one positioning column 124 are provided on one end of the fixed wheel 12 facing the driving mechanism 11, and an output shaft boss 111 and at least one second positioning hole 112 are provided on one end of the driving mechanism 11 facing the fixed wheel 12. The first positioning hole 123 is used to cooperate with the output shaft boss 111, and the positioning column 124 is used to connect with the second positioning hole 112.

[0056] The first positioning hole 123 matches with the output shaft boss 111 of the driving mechanism 11 , and the input wheel 13 passes through the first positioning hole 123 and is connected to the output shaft 110 of the driving mechanism 11 .

[0057] At least one positioning column 124 is further provided at one end of the fixed wheel 12 facing the driving mechanism 11 so as to be connected with the second positioning hole 112 of the driving mechanism 11 in a one-to-one correspondence.

[0058] The positioning connection between the fixed wheel 12 and the driving mechanism 11 is achieved through the cooperation between the first positioning hole 123 and the output shaft boss 111 , the positioning column 124 and the second positioning hole 112 .

[0059] Refer to the figure Fig.11 , Fig.12 When the fixed wheel 12 cooperates with the upper cover 15 , at least one positioning rib 121 is provided on the fixed wheel 12 to cooperate with the positioning groove 151 of the upper cover 15 .

[0060] For example, two protruding positioning ribs 121 are provided on the outer peripheral wall of the fixed wheel 12 of the present application, and two positioning grooves 151 are correspondingly provided on the upper cover 15. The fixed wheel 12 and the upper cover 15 are engaged with each other through the adaptation of the positioning ribs 121 and the positioning grooves 151.

[0061] In addition, at least one snap-in groove 122 is provided on the fixed wheel 12. In the present application, there are two snap-in grooves 122 symmetrically arranged on the outer peripheral wall of the fixed wheel 12, and the two snap-in grooves 122 and the two positioning ribs 121 are evenly spaced; the upper cover 15 is provided with corresponding snaps 152, and the fixed wheel 12 and the upper cover 15 are further fixed by adapting the snaps 152 and the snap-in grooves 122.

[0062] The above-mentioned snap-fitting groove 122 and buckle 152, positioning rib 121 and positioning groove 151 can be used in combination or can be used separately, and can be arranged according to specific needs.

[0063] Please refer to Fig.13 As shown, an embodiment of the present application also discloses a circuit breaker, including a shell 20a, in which a power system 10, a handle 20, an operating mechanism 21 and a contact system 22 as described above are arranged, the output end 143a of the power system 10 is connected to the handle 20, and the handle 20 is connected to the contact system 22 through the operating mechanism 21.

[0064] The output end 143a of the above-mentioned power system 10 forms meshing teeth, and to match it, a gear ring is also formed on the handle 20. The power of the power system 10 is transmitted to the handle 20 through direct meshing of the gear ring and the meshing teeth of the output end 143a, or indirect meshing of the gear ring and the meshing teeth of the output end 143a (meshing parts such as gears are arranged between the gear ring and the meshing teeth of the output end 143a), and the operating mechanism 21 is driven by the handle 20 to realize the opening and closing of the contact system 22.

[0065] The power system 10 of the present application is arranged horizontally, and of course can also be arranged vertically, depending on the specific space layout. The power system 10 can realize remote control of the circuit breaker, improve the transmission efficiency of the circuit breaker, and due to the compact structure of the power system 10, the circuit breaker can be miniaturized to meet the needs of more scenarios.

[0066] The circuit breaker includes the same structure and beneficial effects as the power system 10 in the aforementioned embodiment. The structure and beneficial effects of the power system 10 have been described in detail in the aforementioned embodiment, and will not be repeated here.

[0067] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power system (10), characterized in that: The invention comprises a driving mechanism (11) and a reduction mechanism, wherein the reduction mechanism comprises a planetary gear set (14), one end of the planetary gear set (14) is connected to the driving mechanism (11), and the other end is used for power output; the planetary gear set (14) comprises a planetary carrier (143), and a plurality of groups of combined wheels arranged on the planetary carrier (143), each group of the combined wheels comprises a coaxially arranged A wheel (141) and a B wheel (142), and the radial diameter of the A wheel (141) is unequal to the radial diameter of the B wheel (142).

2. The power system (10) according to claim 1, characterized in that: The driving mechanism (11) and the planetary gear set (14) are meshedly connected via an input wheel (13); the input wheel (13) is provided with a meshing gear shaft (131); the input wheel (13) extends between the plurality of B wheels (142) of the planetary gear set (14) and meshes with the plurality of B wheels (142) via the meshing gear shaft (131).

3. The power system (10) according to claim 2, characterized in that: The A wheel (141) and the B wheel (142) are fixedly connected or integrally arranged; the number of teeth of the A wheel (141) is an integer multiple of the number of teeth of the input wheel (13), and the number of teeth of the B wheel (142) is an integer multiple of the number of teeth of the A wheel (141).

4. The power system (10) according to claim 2 or 3, characterized in that: The speed reduction mechanism further comprises a fixed wheel (12) and an upper cover (15) which cooperate with each other, the fixed wheel (12) being connected to the driving mechanism (11), a cavity being formed between the fixed wheel (12) and the upper cover (15), and the input wheel (13) and the planetary wheel set (14) being located in the cavity; The A wheel (141) of the planetary wheel set (14) is meshed with the fixed wheel (12), and the output end (143a) of the planetary wheel set (14) extends out of the cavity.

5. The power system (10) according to claim 4, characterized in that: Engaging teeth (120) are formed on the inner peripheral wall of the fixed wheel (12) for engaging with the A wheel (141) of the planetary wheel set (14).

6. The power system (10) according to claim 5, characterized in that: The fixed wheel (12) and the driving mechanism (11) are positioned and connected; a first positioning hole (123) and at least one positioning column (124) are provided on one end of the fixed wheel (12) facing the driving mechanism (11); an output shaft boss (111) and at least one second positioning hole (112) are provided on one end of the driving mechanism (11) facing the fixed wheel (12); the first positioning hole (123) is used to cooperate with the output shaft boss (111); and the positioning column (124) is used to connect with the second positioning hole (112).

7. The power system (10) according to claim 5 or 6, characterized in that: A plurality of connecting shafts (143b) are arranged on one side of the planet carrier (143), and the A wheel (141) and the B wheel (142) of the same group are coaxially arranged on the corresponding connecting shafts (143b); the output end (143a) of the planetary gear set (14) is arranged on the other side of the planet carrier (143), and the plurality of connecting shafts (143b) are not coaxially arranged with the output end (143a).

8. The power system (10) according to claim 4, characterized in that: The fixed wheel (12) and the upper cover (15) are snap-fitted; At least one snap-fitting groove (122) is provided on the fixed wheel (12) and snap-fits with a snap buckle (152) provided on the upper cover (15).

9. The power system (10) according to claim 8, characterized in that: At least one positioning rib (121) is provided on the fixed wheel (12) and cooperates with a positioning groove (151) provided on the upper cover (15).

10. A circuit breaker, characterized in that: It comprises a shell (20a), in which the power system (10), a handle (20), an operating mechanism (21) and a contact system (22) according to any one of claims 1 to 9 are arranged, the output end (143a) of the power system (10) is connected to the handle (20), and the handle (20) is connected to the contact system (22) via the operating mechanism (21).

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