A contact trigger system for contactors

Abstract

This invention discloses a contactor triggering system, including a triggering component, a coarse adjustment screw, a transmission rod, and a moving contact. The triggering component is mounted to the tail end of the transmission rod via the coarse adjustment screw, and its installation position can be adjusted by moving it back and forth. The transmission rod is connected to the upper middle part of the moving contact and can rotate around a fulcrum. The moving contact can also rotate with its lower end as the fulcrum. This invention uses an integrated design, that is, the triggering component and the moving contact are mounted together to form a linkage assembly, which operates synchronously. The triggering component adopts a rocker arm structure, which can convert linear drive into rotary motion to realize contact opening and closing and limit switch triggering.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage electrical technology, specifically relating to a contactor triggering system. Background Technology

[0002] Linkage assemblies are common motion modules in contactors, mainly used to realize the opening and closing of moving and stationary contacts and the triggering of limit switches. With the rapid development of modern contactors, users have put forward higher requirements for the mechanical life of contactors. Generally, the operating status of the contactor is monitored by collecting signals from the limit switches, so the synchronization between the two must also be improved.

[0003] The mechanical life of a contactor mainly depends on the service life of the linkage assembly. Due to the trend of "miniaturization" in electrical equipment, the stroke of the drive system is generally small, making it difficult to achieve the opening and closing of large-pitch contacts. In addition, the moving contact mechanism of the contactor is generally independent of the triggering component of the limit switch, making it difficult to achieve high synchronization between the two and difficult to adjust. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems of difficulty in switching between drive stroke and contact opening distance and low synchronization between main and auxiliary contacts in existing contactors, and to provide a contact triggering system for contactors.

[0005] The technical solution adopted by this invention to solve its technical problem is: a contactor triggering system, including a moving contact, a transmission rod movably connected to the upper part of the moving contact and rotatable around a fulcrum, and a triggering component installed at the tail end of the transmission rod by a coarse adjustment screw and adjustable in position by moving back and forth. The lower part of the moving contact is provided with a groove for receiving an external drive system. The triggering component includes a rotating shaft mounted on an external insulating frame, which can be regarded as a fixed fulcrum, and a cam consisting of a left boss and a right boss sleeved on the rotating shaft. It also includes a swing block set between the left boss and the right boss, and a shaft pin that passes through the left boss, the swing block and the right boss in sequence as a fulcrum of motion. The triggering component rotates as a whole around the rotating shaft. The upper and lower sides of the swing block are respectively provided with a bent plate and a fine adjustment screw. The bent plate is fixed to the transmission rod by the coarse adjustment screw. The transmission rod has a slot, and the lower side of the swing block is inserted into the slot. The fine adjustment screw is screwed horizontally into the lower side of the swing block.

[0006] The contactor triggering system described above has an insert on its transmission rod for mounting a coarse adjustment screw.

[0007] The contactor triggering system described above has a transition hole at the lower end of its moving contact, which allows it to rotate with the lower end as a fulcrum.

[0008] The contactor triggering system described above has a fine-tuning screw located in a slot.

[0009] Compared with existing known technologies, the technical solution provided by this invention has the following significant advantages:

[0010] This invention uses an integrated design, rigidly connecting the triggering component and the moving contact, and using double screws for limiting to adjust the timing of the action; the triggering component adopts a rocker arm structure, which can convert linear drive into rotary motion, solving the requirements of small drive stroke and large contact opening distance, reducing the space occupied and improving the service life of the linkage assembly. Attached Figure Description

[0011] Figure 1 This is an isometric view of the present invention;

[0012] Figure 2 This is a top view of the triggering component of the present invention;

[0013] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0014] Figure 4 This is a schematic diagram illustrating the adjustment of the position according to the present invention;

[0015] Figure 5 for Figure 4 A cross-sectional view along the CC direction.

[0016] The reference numerals in the attached figures are as follows: 1—trigger component, 11—shaft pin, 12—cam, 12a—left boss, 12b—right boss, 13—swing block, 14—bent plate, 15—fine adjustment screw, 16—rotating shaft, 2—coarse adjustment screw, 3—transmission rod, 31—insert, 32—slot, 4—moving contact. Detailed Implementation

[0017] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0018] Reference Figure 1 As shown, this invention discloses a contactor triggering system, including a triggering component 1, a coarse adjustment screw 2, a transmission rod 3, and a moving contact 4. The triggering component 1 is movable along the tail of the transmission rod 3 and is fixed by the coarse adjustment screw 2. The other end of the transmission rod 3 is connected to the moving contact 4. The lower part of the moving contact 4 is provided with a groove for receiving an external drive system. The lower end of the moving contact 4 is provided with a transition hole, so that it can rotate with the lower end as a fulcrum.

[0019] Reference Figure 2As shown, the triggering component 1 includes a pin 11, a cam 12, a rocker block 13, a bent plate 14, a fine-tuning screw 15, and a rotating shaft 16. The cam 12 consists of a left boss 12a and a right boss 12b. The rocker block 13 is positioned between the left boss 12a and the right boss 12b. The pin 11 passes through the left boss 12a, the rocker block 13, and the right boss 12b in sequence. The rotating shaft 16 is mounted on an external insulating frame and can be considered a fixed fulcrum, while the pin 11 is the moving fulcrum. The entire triggering component 1 rotates around the rotating shaft 16.

[0020] The upper and lower sides of the swing block 13 are respectively provided with a bent plate 14 and a fine-tuning screw 15. The bent plate 14 is fixed to the transmission rod 3 by a coarse-tuning screw 2. The transmission rod 3 has a slot 32 and an insert 31 for installing the coarse-tuning screw 2. The lower side of the swing block 13 is inserted into the slot 32. The fine-tuning screw 15 is located in the slot 32 and is screwed horizontally into the lower side of the swing block 13. By turning the fine-tuning screw 15, the position of the swing block 13 can be changed, thereby driving the cam 12 to rotate and change its initial position.

[0021] Reference Figure 3 , Figure 4 and Figure 5 As shown, the transmission rod 3 has an insert 31 and a slot 32, which correspond to the coarse adjustment screw 2 and the fine adjustment screw 15, respectively. When adjusting the triggering sequence, the position of the transmission rod 3 remains unchanged. If the fine adjustment screw 15 is tightened, the rocker block 13 moves to the right, the cam 12 swings counterclockwise, and the left boss 12a moves away from the limit switch, thus delaying the triggering. If the fine adjustment screw 15 is loosened, the rocker block 13 moves to the left, the cam 12 swings clockwise, and the right boss 12a moves closer to the limit switch, thus advancing the triggering.

[0022] When the limit switch is installed on the left boss 12a, it is initially in the released state. At this time, when the bent plate 14 is pulled to the left, the shaft pin 11 is also subjected to force to the left, and the cam 12 swings clockwise. The left boss 12a will press down the limit switch to switch. When the limit switch is installed on the right boss 12b, it is initially in the pressed state. When the bent plate 14 is pulled to the right, the shaft pin 11 is also subjected to force to the right, and the cam 12 swings counterclockwise. The right boss 12b will release the limit switch to switch.

[0023] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some of the application examples. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A contact triggering system for a contactor, characterized in that: The device includes a moving contact (4), a transmission rod (3) movably connected to the upper part of the moving contact (4), and a triggering component (1) installed at the tail end of the transmission rod (3) by a coarse adjustment screw (2). The lower part of the moving contact (4) is provided with a groove for receiving an external drive system. The triggering component (1) includes a rotating shaft (16) and a cam (12) consisting of a left boss (12a) and a right boss (12b) sleeved on the rotating shaft (16). It also includes components provided on the left boss (12a) and the right boss. The swing block (13) between (12b) and the shaft pin (11) passing through the left boss (12a), the swing block (13) and the right boss (12b) in sequence. The upper and lower sides of the swing block (13) are respectively provided with a bent plate (14) and a fine adjustment screw (15). The bent plate (14) is fixed on the transmission rod (3). The transmission rod (3) has a slot (32). The lower side of the swing block (13) is inserted into the slot (32). The fine adjustment screw (15) is screwed horizontally into the lower side of the swing block (13).

2. The contact triggering system for a contactor according to claim 1, characterized in that, The transmission rod (3) is provided with an insert (31) for installing the coarse adjustment screw (2).

3. A contactor contact triggering system according to claim 2, characterized in that, The moving contact (4) is provided with a transition hole at its lower end.

4. A contactor contact triggering system according to claim 1, 2, or 3, characterized in that, The fine-tuning screw (15) is located in the slot (32).

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