Switch

Abstract

A switch belongs to the technical field of low-voltage apparatuses. Comprising a main shaft, a shell and a contact system, the contact system is arranged in the shell, the main shaft is rotationally arranged on the outer side of the shell, a swing piece is installed on the main shaft, the swing piece is in linkage with a moving contact of the contact system through hinge joint, and the contact system is arranged in the shell. At least one of the pendulous reeds is provided with an impact end, and when the main shaft rotates to a switching-off in-place position, the impact end impacts the housing to prevent the main shaft from continuously rotating along the switching-off direction. The utility model has the advantages that the impact end is arranged on the swing sheet of the main shaft connected with the moving contact, the number of parts is reduced, and the structure is simplified.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of low-voltage electrical apparatus, and particularly relates to a switch. BACKGROUND

[0002] In the breaking process of the switch, the moving speed of the moving contact is very fast due to the electric force, and a large amount of kinetic energy and momentum is accumulated. The existing switch limits the breaking by the collision of metal parts in the operating mechanism. The defect is that, since the collision time of the metal parts is very short, high stress is easily caused to result in deformation or damage of the components, the movement is blocked, and the operating performance of the operating mechanism of the switch is reduced. In order to solve the above problems, the switch is provided with a special buffer structure. The existing buffer structure limits the position by welding a separate impact piece on the rotating shaft, but it needs to additionally increase the impact piece, which increases the number of switch parts and is not conducive to low cost and structural simplification.

[0003] In view of the above prior art, the applicant has made a beneficial design, and the technical scheme to be introduced below is produced in this background. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a switch which sets the impact end on the swing piece of the main shaft connected with the moving contact to replace the separately set impact piece, so that the number of switch parts can be reduced and the structure can be simplified.

[0005] The utility model discloses a switch which sets the impact end on the swing piece of the main shaft connected with the moving contact to replace the separately set impact piece, so that the number of switch parts can be reduced and the structure can be simplified.

[0006] In one specific embodiment of the utility model, the shell comprises a base and a bottom plate, and the base is provided with a buffer block for the impact end to impact on one side facing the main shaft.

[0007] In another specific embodiment of the utility model, the operating mechanism is further included, the number of swing pieces is consistent with the number of moving contacts, the operating mechanism is installed on the outer surface of the base, and the swing piece located outside the operating mechanism is provided with the impact end.

[0008] In another specific embodiment of this utility model, the operating mechanism is a disintegration mechanism. When the switch is normally open or closed, the operating mechanism drives the main shaft to rotate, and the main shaft drives the moving contact to move. When the switch is tripped, the operating mechanism disintegrates itself, releasing the restriction on the main shaft.

[0009] In another specific embodiment of this utility model, a clamp is also included. There is a pair of clamps, which are respectively disposed at both ends of the main shaft and fixed to the base. The clamps are provided with through holes, and both ends of the main shaft are rotatably inserted into the through holes.

[0010] In another specific embodiment of this utility model, a journal is provided on the main shaft, and the journal is used to cooperate with the clamp for installation.

[0011] In a further specific embodiment of this utility model, the moving contact includes a hinge rod, a contact support, and a moving contact piece. The moving contact piece is rotatably disposed on the contact support. A contact spring is also provided between the contact support and the moving contact piece. The hinge rod is hinged to the side of the contact support opposite to the moving contact piece. The swing piece is hinged to the hinge rod.

[0012] In a further specific embodiment of this utility model, the impact end is hammer-shaped.

[0013] In yet another specific embodiment of this utility model, the buffer block is square or U-shaped.

[0014] In yet another specific embodiment of this utility model, one rotating end of the pendulum forms the impact end, while the other rotating end opposite the impact end forms a hinge end. The hinge end has a hinge hole, and the pendulum has a rotating hole at its rotation center position. The rotating hole is used for mounting the main shaft, and the hinge hole is used for hinged with the moving contact.

[0015] Because this invention adopts the above-mentioned structure, an impact end is provided on the swing plate that connects the main shaft to the moving contact. Compared with the prior art that provides a dedicated impact plate on the main shaft, this reduces the number of parts and simplifies the structure. Attached Figure Description

[0016] Figure 1 This is a partial structural diagram of the switch described in this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the operating mechanism and the main shaft described in this utility model;

[0018] Figure 3This is a schematic diagram of the hinge connection between the main shaft and the moving contact of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the swing plate described in this utility model.

[0020] In the figure: 1. Main shaft; 2. Operating mechanism; 21. Side plate; 3. Housing; 31. Base; 32. Bottom plate; 4. Swing plate; 41. Impact end; 42. Rotating hole; 43. Hinge hole; 5. Clamp; 6. Contact system; 61. Moving contact; 611. Hinge rod; 612. Contact support; 613. Moving contact piece; 62. Stationary contact; 100. Buffer block. Detailed Implementation

[0021] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0022] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.

[0023] like Figure 1 and Figure 3 This utility model relates to a switch, which includes a main shaft 1, an operating mechanism 2, and a housing 3. The housing 3 is constructed by splicing a base 31 and a bottom plate 32. A contact system 6 is provided inside the housing 3, and an arc-extinguishing chamber (not shown in the figure) is also provided above the contact system 6. The contact system 6 includes a moving contact 61 and a stationary contact 62. The stationary contact 62 is fixedly mounted on the bottom plate 32, and the moving contact 61 is rotatably mounted on the base 31. Preferably, the moving contact 61 is oscillating, and after oscillating, the moving contact 61 contacts or separates from the stationary contact 62.

[0024] The operating mechanism 2 is the energy component of the switch. During normal opening and closing of the switch, the operating mechanism 2 drives the main shaft 1 to rotate. The rotation of the main shaft 1 then actuates the moving contact 61, meaning the main shaft 1 causes the moving contact 61 to close or separate from the stationary contact 62. Preferably, the operating mechanism 2 is a disintegration mechanism. When the switch trips, the operating mechanism 2 disintegrates, releasing the restriction on the main shaft 1. Therefore, when the moving contact 61 is pushed open, the main shaft 1 will rotate accordingly.

[0025] The operating mechanism 2 is mounted on the outer surface of the base 31, and the main shaft 1 is rotatably mounted on the outer surface of the base 31. Specifically, a pair of clamps 5 are provided on the base 31 at positions corresponding to both ends of the main shaft 1. Each clamp 5 has a through hole, through which both ends of the main shaft 1 pass, and the two are rotatably mounted relative to each other. More specifically, the main shaft 1 has a journal, which is used to mate with the clamps 5. Furthermore, to ensure the flexibility of relative movement between the journal and the clamps 5, a bearing or bushing can be provided between them.

[0026] Please see Figure 2 and combined Figure 3 Furthermore, the main shaft 1 is a cylindrical metal shaft, a shape that facilitates its rotation around its axis. A swing plate 4 is fitted onto the main shaft 1. Preferably, the swing plate 4 is fixedly installed on the main shaft 1, allowing it to rotate synchronously with the main shaft 1, with the rotation center of the swing plate 4 also being the axis of the main shaft 1. The swing plate 4 and the moving contact 61 of the contact system 6 are linked together.

[0027] See you later Figure 3 The movable contact 61 includes a hinge rod 611, a contact support 612, and a movable contact piece 613. The movable contact piece 613 is rotatably mounted on the contact support 612. A contact spring is also provided between the contact support 612 and the movable contact piece 613. The hinge rod 611 is hinged to the side of the contact support 612 opposite to the movable contact piece 613. The swing plate 4 is hinged to the hinge rod 611.

[0028] Please see Figure 4 The pendulum 4 is made of sheet metal. One rotating end of the pendulum 4 forms the impact end 41, while the other rotating end opposite the impact end 41 forms a hinge end. The hinge end has a hinge hole 43, and the pendulum 4 has a rotating hole 42 at its rotation center. The rotating hole 42 is for mounting the main shaft 1. Specifically, the main shaft 1 passes through the rotating hole 42 and is then fixed to the rotating hole 42 by welding. The hinge hole 43 is hinged to the moving contact 61, realizing the linkage relationship between the pendulum 4 and the moving contact 61. Specifically, the pendulum 4 is hinged to the hinge rod 611. The hinge rod 611 also has mounting holes corresponding to the hinge hole 43. A pin passes through the hinge hole 43 and the corresponding mounting holes on the hinge rod 611 to hinge the two together.

[0029] The impact end 41 is used to impact the housing 3, thereby limiting the rotation of the main shaft 1. When there are multiple swing plates 4, at least one swing plate 4 is provided with an impact end 41, which can achieve this limiting function. Specifically, the impact end 41 impacts the outer side of the base 31. Preferably, the base 31 has a buffer block 100 installed on the side facing the main shaft 1 for the impact end 41 to impact.

[0030] Furthermore, the aforementioned impact only occurs when the main shaft 1 rotates to the open position. When the main shaft 1 reaches the open position, the impact prevents the main shaft 1 from continuing to rotate in the open direction, thus preventing further open rotation. The buffer block 100 has an anti-rebound effect, absorbing energy during the impact and reducing the energy of the main shaft 1 rebounding after being struck by the swing plate 4. The buffer block 100 is made of an elastic material, such as rubber. Preferably, the impact end 41 is hammer-shaped, while the buffer block 100 is square or "┴"-shaped.

[0031] The number of swing plates 4 is the same as the number of moving contacts 61. That is, in a three-phase switch, there are three swing plates 4 and three moving contacts 61; while in a four-phase switch, there are four swing plates 4 and four moving contacts 61. When the swing plates 4 are arranged, one swing plate 4 corresponds to the interior of the operating mechanism 2, that is, it is located between a pair of side plates 21 of the operating mechanism 2. Typically, the swing plate 4 located inside the operating mechanism 2 is also equipped with two auxiliary plates, which are not hinged to the moving contact 61. The remaining swing plates 4 correspond to the exterior of the operating mechanism 2. Considering space limitations, preferably, the impact end 41 is provided on the swing plates 4 corresponding to the exterior of the operating mechanism 2, while the impact end 41 is not provided on the swing plates 4 corresponding to the interior of the operating mechanism 2.

[0032] In the above structure, the swing plate 4 serves two purposes: firstly, it acts as a connecting component for the main shaft 1 to link with the moving contact 61; secondly, it restricts the continued rotation of the main shaft 1 after it reaches the open position, eliminating the need for a dedicated impact plate on the main shaft 1 for limiting the movement. Because the swing plate 4 possesses these dual functions, it reduces the number of parts, simplifies the structure, and saves costs, thus achieving the purpose of the invention.

Claims

1. A switch comprising a main shaft (1), a housing (3), and a contact system (6), wherein the contact system (6) is disposed inside the housing (3), and the main shaft (1) is rotatably disposed outside the housing (3), a swing plate (4) is mounted on the main shaft (1), and the swing plate (4) is linked to the moving contact (61) of the contact system (6) by a hinge, characterized in that: At least one of the swing plates (4) is provided with an impact end (41). When the main shaft (1) rotates to the open position, the impact end (41) impacts the housing (3) to prevent the main shaft (1) from continuing to rotate in the open direction.

2. A switch according to claim 1, characterized in that: The housing (3) includes a base (31) and a bottom plate (32). The base (31) has a buffer block (100) installed on the side facing the main shaft (1) for impact by the impact end (41).

3. A switch according to claim 2, characterized in that: It also includes an operating mechanism (2), the number of the swing plates (4) is the same as the number of the moving contacts (61), the operating mechanism (2) is installed on the outer surface of the base (31), and the swing plates (4) located outside the operating mechanism (2) are provided with the impact end (41).

4. A switch according to claim 3, characterized in that: The operating mechanism (2) is a disintegration mechanism. When the switch is normally open or closed, the operating mechanism (2) drives the main shaft (1) to rotate, and the main shaft (1) drives the moving contact (61) to move. When the switch is tripped, the operating mechanism (2) disintegrates itself, releasing the restriction on the main shaft (1).

5. A switch according to claim 2, characterized in that: It also includes a clamp (5), which is a pair, located at both ends of the main shaft (1) and fixed to the base (31). The clamp (5) has a through hole, and both ends of the main shaft (1) are rotatably inserted into the through hole.

6. A switch according to claim 5, characterized in that: The main shaft (1) has a journal, which is used to cooperate with the clamp (5) for installation.

7. A switch according to claim 1, characterized in that: The movable contact (61) includes a hinge rod (611), a contact support (612), and a movable contact piece (613). The movable contact piece (613) is rotatably mounted on the contact support (612). A contact spring is also provided between the contact support (612) and the movable contact piece (613). The hinge rod (611) is hinged to the side of the contact support (612) facing away from the movable contact piece (613). The swing piece (4) is hinged to the hinge rod (611).

8. A switch according to claim 1, characterized in that: The impact end (41) is hammer-shaped.

9. A switch according to claim 2, characterized in that: The buffer block (100) is square or U-shaped.

10. A switch according to claim 1, characterized in that: One rotating end of the swing plate (4) forms the impact end (41), and the other rotating end opposite the impact end (41) forms the hinge end. The hinge end has a hinge hole (43). The swing plate (4) has a rotating hole (42) at its rotation center position. The rotating hole (42) is used for the main shaft (1) to be fitted and installed. The hinge hole (43) is used to hinge with the moving contact (61).

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