Moving contact system and dual-power automatic change-over switch

Abstract

The utility model discloses a moving contact system and a dual power supply automatic change-over switch, comprising an upper housing, a lower housing and a contact assembly, the contact assembly is located between the upper housing and the lower housing, and the upper housing and the lower housing are connected and fixed by adopting a fixing screw mode; the device further comprises a first elastic piece and a second elastic piece, and the first elastic piece and the second elastic piece are located in the fixing piece. A first limiting boss is further arranged on the inner surface of the lower shell, and the fixing piece is arranged on the first limiting boss in a sleeving mode. Compared with the prior art, the moving contact system is simple in structure, reliable in action and convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a moving contact and a dual-power automatic conversion switch. Background Art

[0002] Chinese patent CN219163241U discloses a moving contact assembly of an automatic transfer switch electrical appliance, which has the following problems: The moving contact assembly part involves many parts, and the tension spring scheme is complicated and the assembly is cumbersome.

[0003] Therefore, the utility model needs to provide a moving contact system and a dual power automatic transfer switch with simple structure and convenient assembly. Utility Model Content

[0004] The purpose of the utility model is to provide a moving contact system, so as to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: A moving contact system, comprising: an upper shell, a lower shell and a contact assembly, wherein the contact assembly is located between the upper shell and the lower shell, and the upper shell and the lower shell are connected and fixed by fixing screws; The contact assembly comprises a first straight arm, a second straight arm and a fixing member, and the first straight arm and the second straight arm are respectively located on both sides of the fixing member; Moving contacts are provided on the upper surfaces of the ends of the first straight arm and the second straight arm away from each other; It also comprises a first elastic member and a second elastic member, and the first elastic member and the second elastic member are located in the fixing member; A first limiting boss is also provided on the inner surface of the lower shell, and the fixing member is sleeved on the first limiting boss.

[0006] Furthermore, a first cylindrical boss and a second cylindrical boss are respectively provided on both sides of the first limiting boss, the first cylindrical boss is used to fix the first elastic member, and the second cylindrical boss is used to fix the second elastic member.

[0007] Furthermore, a semi-circular boss is provided on the inner surface of the lower shell, and the semi-circular boss is located below the first limiting boss. A first extending boss and a second extending boss are respectively provided at two ends of the semi-circular boss.

[0008] Furthermore, it also includes a second limiting boss and a third limiting boss, and the second limiting boss and the third limiting boss are located above the first limiting boss.

[0009] Furthermore, the first straight arm and the fixing member, and the fixing member and the second straight arm are connected in an integrally formed manner.

[0010] Furthermore, the fixing piece is a circle with a hollow structure, and a concave portion is provided at the upper end of the circle, and the concave portion is concave inwardly toward the center of the circle.

[0011] Furthermore, the recess is V-shaped.

[0012] Furthermore, the first limiting boss is fan-shaped.

[0013] Furthermore, sliding slots are provided on both sides of the upper shell and the lower shell, and the first straight arm and the second straight arm extend out from the sliding slots provided on both sides respectively.

[0014] Furthermore, a welding point is provided at the lower end of the fixing member, and the welding point is used for welding a flexible connection. The utility model also provides a dual power automatic transfer switch, comprising the above-mentioned moving contact system.

[0015] The beneficial effects of the utility model are as follows: the movable contact system of the utility model has a simple installation structure, reliable operation, and is relatively convenient to assemble, thereby improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of the movable contact system of the utility model;

[0017] FIG2 is an exploded view of the movable contact system of the utility model;

[0018] FIG3 is a structural diagram of the lower housing of the utility model;

[0019] FIG4 is a structural diagram of the upper housing of the utility model;

[0020] FIG5 is a double split position diagram of the new moving contact system of the present utility model;

[0021] Figure 6 It is a closing position diagram of the moving contact system of the utility model.

[0022] Figure numerals: upper shell 1, lower shell 2, contact assembly 3, moving contact 4, first elastic member 5, second elastic member 6, first limiting boss 7, first cylindrical boss 8, second cylindrical boss 9, semicircular arc boss 10, first extension boss 11, second extension boss 12, second limiting platform 13, third limiting platform 14, welding point 15, sliding slot 16, lower slot 17; first straight arm 31, second straight arm 32; fixing member 33. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to explain the utility model, and are not used to limit the utility model.

[0024] Among them, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. The special word "exemplary" used here means "used as an example, embodiment or illustrative". Any embodiment described here as "exemplary" is not necessarily interpreted as being superior or better than other embodiments.

[0026] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0027] like Figure 1-Figure 6As shown, a moving contact system comprises: an upper shell 1, a lower shell 2 and a contact assembly 3, wherein the contact assembly 3 is located between the upper shell 1 and the lower shell 2, and the upper shell 1 and the lower shell 2 are connected and fixed by fixing screws; the contact assembly 3 comprises a first straight arm 31, a second straight arm 32 and a fixing member 33, wherein the first straight arm 31 and the second straight arm 32 are respectively located on both sides of the fixing member 33, the first straight arm 31 and the fixing member 33, and the fixing member 33 and the second straight arm 31 are connected by integral molding, and the angle between the first straight arm 31 and the second straight arm 32 is less than 170°, so that the first elastic member and the second elastic member can complete the contact conversion at a very small twisting angle, which greatly improves the force conversion efficiency, and the smaller deformation of the first elastic member and the second elastic member also improves the service life; the overall structure with fewer parts also greatly improves the assembly efficiency, and the operation of the mechanism will also be more stable and reliable; the first straight arm 31 and the second straight arm 32 A moving contact 4 is provided on the upper surface of the ends away from each other, and the moving contact 3 is fixed on the upper surface of the ends away from each other of the first straight arm 31 and the second straight arm 32 by welding, so as to ensure that the moving contact can be firmly fixed on the first straight arm 31 and the second straight arm 32; it also includes a first elastic member 5 and a second elastic member 6, the first elastic member 5 and the second elastic member 6 are located in the fixing member 3, in this embodiment, the first elastic member 5 and the second elastic member 6 have the same structure and are equal in size, specifically in this embodiment, the first elastic member 5 and the second elastic member 6 are torsion springs, the cross-section of the torsion spring is triangular, the two sides of the first elastic member 5 and the second elastic member 6 are respectively located between the first limiting boss and the V-shaped recess, and the two sides of the first elastic member and the second elastic member are respectively in contact with one side of the mutually approaching surface of the first limiting boss and the V-shaped recess, when the double-part switch is turned to the closed state, the first elastic member and the second elastic member are compressed. A first limiting boss 7 is also provided on the inner surface of the lower shell body, and the fixing member 33 is sleeved on the first limiting boss 7 and supported by energy storage of elastic elements on both sides, so as to limit the fixing member. In the present embodiment, the shape of the first limiting boss 7 is fan-shaped, and in actual use, the shape of the first limiting boss 7 can also be other shapes, such as: circular, elliptical or square, which are not limited to the specific ones.

[0028] It can be known from the above method that since the angle between the first straight arm 31 and the second straight arm 32 is set to be less than 170°, the first elastic member 5 and the second elastic member 6 can complete the contact conversion under a very small twisting angle, which greatly improves the force conversion efficiency. The smaller deformation of the first elastic member 5 and the second elastic member 6 also improves the service life; the overall structure with fewer parts also greatly improves the assembly efficiency and the operation of the mechanism will be more stable and reliable.

[0029] In this embodiment, a first cylindrical boss 8 and a second cylindrical boss 9 are respectively provided on both sides of the first limiting boss 7, the first cylindrical boss 8 is used to fix the first elastic member 5, and the second cylindrical boss 9 is used to fix the second elastic member 6, and the first cylindrical boss 8 and the second cylindrical boss 9 are fixed to the inner surface of the lower shell body 2 at one end thereof close to the inner surface of the lower shell body 2 by integral molding, thereby ensuring that the first cylindrical boss 8 and the second cylindrical boss 9 can be firmly fixed on the inner surface of the lower shell body 2.

[0030] In addition, it is worth mentioning that a semicircular boss 10 is also provided on the inner surface of the lower shell 2, and the semicircular boss 10 is located below the first limiting boss 7, and the two ends of the semicircular boss 10 are respectively provided with a first extension boss 11 and a second extension boss 12; it also includes a second limiting boss 13 and a third limiting boss 14, and the second limiting boss 13 and the third limiting boss 14 are located above the first limiting boss 7; a spacing is provided between the first limiting boss 7 and the semicircular boss 10, and a spacing is provided between the second limiting boss 13 and the third limiting boss 14 and the first limiting boss 7. During assembly, the fixing member 33 is installed in the spacing, so that the fixing member 33 can be limited in the spacing, avoiding deformation or movement of the contact assembly due to external force, and ensuring a more stable structure. In this embodiment, the second limit platform 13 and the third limit platform 14 have the same shape and size, and the second limit platform 13 and the third limit platform 14 are connected and fixed to the lower shell 2 by integral molding on one side close to the lower shell, thereby ensuring that the second limit platform 13 and the third limit platform 14 can be firmly fixed on the lower shell 2.

[0031] In addition, it should be noted that, in the present embodiment, the fixing member 33 is a circular shape with a hollow structure, and a recess is provided at the upper end of the circle, the recess is V-shaped, and the recess is concave toward the center direction of the circle; the lower end of the fixing member is also provided with a welding point 15, and the welding point is used for welding a flexible connection. In the present embodiment, the welding point is a welding groove, and in the actual production process, the shape of the welding groove can also be other shapes, which are not specifically limited. In order to cooperate with the installation of the flexible connection, a lower notch 17 is also provided below the upper shell 1 and the lower shell 2, and the flexible connection extends from the lower notch 17.

[0032] In addition, it is worth mentioning that sliding slots 16 are provided on both sides of the upper shell 1 and the lower shell 2, and the first straight arm 31 and the second straight arm 32 extend from the sliding slots 16 provided on both sides respectively, and the width of the sliding slot 16 is greater than the width of the first straight arm 31 or the second straight arm 32.

[0033] As shown in FIG. 5 , at this time, the contact is in a double-split state, the fixing member 33 contacts the arc surface of the first limiting boss 7 by relying on the elastic element in the first state after compression, and the first straight arm 31 and the second straight arm 32 are tightly attached to the upper inner surface of the sliding slot 16 .

[0034] From Figure 5 to Figure 6, the double-part rotation to the closed state, at this time, after the contact 4 contacts the static contact, as the shell rotates, the fixing member 33 gradually separates from the inner surface of the upper end of the sliding groove at the second straight arm 32, and the second elastic member 6 continues to be compressed to the third state, providing pressure to the contact, and the first elastic member 5 is released to the second state. Due to the limit feature, a sliding state to one side will occur after the contact contacts. At this time, as shown in Figure 6, the arc surface at the lower end of the fixing member is supported by one end of the arc surface of the semicircular arc boss, and the internal arc of the fixing member slides to the side of the arc surface of the first limit boss close to the first straight arm. This is to reach the closed state and the contact cannot continue to swing.

[0035] From FIG. 6 to FIG. 5 , the state from closing to opening is shown. As the contacts are released, the first elastic member 5 is released and compressed to the first state, and the fixing member returns to the initial opening state.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A moving contact system, characterized in that: include: An upper shell, a lower shell and a contact assembly, wherein the contact assembly is located between the upper shell and the lower shell, and the upper shell and the lower shell are connected and fixed by fixing screws; the contact assembly includes a first straight arm, a second straight arm and a fixing member, and the first straight arm and the second straight arm are respectively located on both sides of the fixing member; the upper surfaces of the first straight arm and the second straight arm at the ends away from each other are both provided with moving contacts; it also includes a first elastic member and a second elastic member, and the first elastic member and the second elastic member are located in the fixing member; a first limiting boss is also provided on the inner surface of the lower shell, and the fixing member is sleeved on the first limiting boss.

2. The moving contact system according to claim 1, characterized in that: A first cylindrical boss and a second cylindrical boss are respectively provided on both sides of the first limiting boss. The first cylindrical boss is used to fix the first elastic member, and the second cylindrical boss is used to fix the second elastic member.

3. The moving contact system according to claim 1, characterized in that: A semi-circular boss is also provided on the inner surface of the lower shell, and the semi-circular boss is located below the first limiting boss. A first extending boss and a second extending boss are respectively provided at two ends of the semi-circular boss.

4. The moving contact system according to claim 3, characterized in that: It also includes a second limiting boss and a third limiting boss, wherein the second limiting boss and the third limiting boss are located above the first limiting boss.

5. The moving contact system according to claim 1, characterized in that: The first straight arm and the fixing member, and the fixing member and the second straight arm are connected in an integrally formed manner.

6. The moving contact system according to claim 1, characterized in that: The fixing piece is a hollow circular structure, and a concave portion is provided at the upper end of the circle, and the concave portion is concave inwardly toward the center of the circle. A welding point is also provided at the lower end of the fixing piece, and the welding point is used for welding a flexible connection.

7. The moving contact system according to claim 6, characterized in that: The recess is V-shaped.

8. The moving contact system according to claim 3, characterized in that: The first limiting boss is in a fan shape.

9. The contact system according to claim 1, characterized in that: Sliding slots are also provided on both sides of the upper shell and the lower shell, and the first straight arm and the second straight arm extend out from the sliding slots provided on both sides respectively.

10. A dual power automatic transfer switch, comprising a moving contact system, characterized in that: The movable contact system is the same as the movable contact system according to any one of claims 1 to 9.

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