Contact triggering system for contactor

Abstract

The contact triggering system comprises a triggering part, a coarse adjustment screw, a transmission rod and a moving contact, the triggering part is installed at the tail end of the transmission rod through the coarse adjustment screw and can move front and back to adjust the installation position, the transmission rod is connected with the upper middle portion of the moving contact and can rotate around a fulcrum, and the moving contact can also rotate with the lower end as the fulcrum. According to the invention, an integrated design is used, that is, the trigger part and the moving contact are installed together to form a connecting rod assembly and act synchronously, the trigger part adopts a swing rod type structure, linear driving can be converted into rotating motion, and contact closing and opening and travel switch triggering are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a contact trigger system for a contactor. Background Art

[0002] The connecting rod assembly is a common motion module in the contactor, which is mainly used to realize the closing and opening of the moving and static contacts and the triggering of the travel switch. With the rapid development of modern contactors, users have put forward higher requirements for the mechanical life of contactors. Generally, the action status of the contactor is monitored by collecting the signal of the travel switch, so the synchronization of the two must also be improved.

[0003] The mechanical life of the contactor mainly depends on the service life of the connecting rod assembly. Due to the development trend of "miniaturization" of electrical equipment, the stroke of the drive system is generally small, making it difficult to achieve the closing and opening of large-opening contacts; in addition, the moving contact mechanism of the contactor is generally independent of the trigger component of the travel switch, making it difficult to achieve high synchronization between the two and difficult to adjust. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems of the existing contactor, such as the difficulty in converting the driving stroke and the contact opening distance, the low synchronization of the main and auxiliary contacts, and to provide a contact trigger system for the contactor.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a contact trigger system for a contactor, comprising a moving contact, a transmission rod movably connected to the upper and middle parts of the moving contact and capable of rotating around a fulcrum, and a trigger component installed at the tail end of the transmission rod by a coarse adjustment screw and capable of moving forward and backward to adjust the installation position, a groove for receiving an external drive system is provided at the lower and middle part of the moving contact; the trigger component comprises a rotating shaft installed on an external insulating frame, which can be regarded as a fixed fulcrum, and a cam sleeved on the rotating shaft and composed of a left boss and a right boss, a swing block arranged between the left boss and the right boss, and an axle pin as a moving fulcrum which passes through the left boss, the swing block and the right boss in sequence, the trigger component as a whole rotates around the rotating shaft, a bent plate and a fine adjustment screw are respectively provided on the upper and lower sides of the swing block, the bent plate is fixed to the transmission rod by a coarse adjustment screw, a card slot is provided on the transmission rod, the lower side of the swing block is inserted into the card slot, and the fine adjustment screw is horizontally screwed into the lower side of the swing block.

[0006] In the contact triggering system for a contactor, an insert for installing a coarse adjustment screw is provided on the transmission rod.

[0007] The contact trigger system for a contactor has a transfer hole at the lower end of the moving contact, so that the moving contact can rotate with the lower end as a fulcrum.

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

[0009] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects: The present invention adopts an integrated design, rigidly connects the trigger component with the moving contact, and limits the action sequence through double screws; the trigger component adopts a rocker structure, which can convert linear drive into rotational motion, solves the use requirements of small drive stroke and large contact opening distance, reduces the occupied space and improves the service life of the connecting rod assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is an axonometric view of the present invention; Figure 2 A top view of the trigger component of the present invention; Figure 3 for Figure 2 Sectional view in the AA direction; Figure 4 It is a schematic diagram of adjusting the position of the present invention; Figure 5 for Figure 4 Cross-sectional view along CC direction.

[0011] The reference numerals of the figures are: 1—trigger component, 11—axis pin, 12—cam, 12a—left boss, 12b—right boss, 13—swing block, 14—bend plate, 15—fine-tuning screw, 16—rotating shaft, 2—coarse-tuning screw, 3—transmission rod, 31—insert, 32—slot, 4—moving contact. DETAILED DESCRIPTION

[0012] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0013] Reference Figure 1 As shown, the present invention discloses a contact trigger system for a contactor, comprising a trigger component 1, a coarse adjustment screw 2, a transmission rod 3 and a moving contact 4. The trigger component 1 can move 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. A groove is provided in the lower part of the moving contact 4 for receiving an external drive system. A transfer hole is provided at the lower end of the moving contact 4 so that the lower end can be used as a fulcrum for rotation.

[0014] Reference Figure 2 As shown, the trigger component 1 includes an axle pin 11, a cam 12, a pendulum block 13, a bent plate 14, a fine-tuning screw 15 and a rotating shaft 16, wherein the cam 12 is composed of a left boss 12a and a right boss 12b, the pendulum block 13 is arranged between the left boss 12a and the right boss 12b, and the axle pin 11 passes through the left boss 12a, the pendulum block 13 and the right boss 12b in sequence. The rotating shaft 16 is installed on the external insulating frame and can be regarded as a fixed fulcrum, and the axle pin 11 is a moving fulcrum. The trigger component 1 as a whole rotates around the rotating shaft 16 as the center.

[0015] The upper and lower sides of the pendulum 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 the coarse-adjusting screw 2. The transmission rod 3 is provided with a slot 32 and an insert 31 for installing the coarse-adjusting screw 2. The lower side of the pendulum block 13 is inserted into the slot 32. The fine-tuning screw 15 is located in the slot 32. The fine-tuning screw 15 is horizontally screwed into the lower side of the pendulum block 13. The position of the pendulum block 13 can be changed by turning the fine-tuning screw 15, thereby driving the cam 12 to rotate to change its initial position.

[0016] Reference Figure 3 , Figure 4 and Figure 5 As shown, there are inserts 31 and slots 32 on the transmission rod 3, which correspond to the coarse adjustment screw 2 and the fine adjustment screw 15 respectively. When adjusting the trigger timing, the position of the transmission rod 3 remains unchanged. If the fine adjustment screw 15 is tightened, the pendulum block 13 moves right, the cam 12 swings counterclockwise, the left boss 12a moves away from the travel switch, and the triggering is delayed; if the fine adjustment screw 15 is loosened, the pendulum block 13 moves left, the cam 12 swings clockwise, the right boss 12a approaches the travel switch, and the triggering is advanced.

[0017] When the travel switch is installed corresponding to the left boss 12a, it is initially in a released state. At this time, the bent plate 14 is pulled to the left, the axle pin 11 is also forced to the left, the cam 12 swings clockwise, and the left boss 12a presses down the travel switch for conversion; when the travel switch is installed corresponding to the right boss 12b, it is initially in a pressed state. When the bent plate 14 is pulled to the right, the axle pin 11 is also forced to the right, the cam 12 swings counterclockwise, and the right boss 12b releases the travel switch for conversion.

[0018] The above embodiments are only illustrative of the principles and effects of the present invention, as well as some embodiments of its application. For those skilled in the art, several modifications and improvements may be made without departing from the creative concept of the present invention, and all of these belong to the protection scope of the present invention.

Claims

1. A contact trigger system for a contactor, characterized in that: The invention comprises a moving contact (4), a transmission rod (3) movably connected to the upper middle part of the moving contact (4), and a trigger component (1) mounted on the rear end of the transmission rod (3) via a coarse adjustment screw (2); the lower middle part of the moving contact (4) is provided with a groove for receiving an external drive system; the trigger component (1) comprises a rotating shaft (16) and a cam (12) sleeved on the rotating shaft (16) and composed of a left boss (12a) and a right boss (12b); and further comprises a cam (12) arranged on the left boss (12a) and the right boss (12b). A swing block (13) is provided between the left boss (12a), the swing block (13) and the right boss (12b), and an axle pin (11) passing through the left boss (12a), the swing block (13) and the right boss (12b) in sequence, wherein the swing block (13) is provided with a bent plate (14) and a fine-tuning screw (15) on the upper and lower sides respectively, the bent plate (14) is fixed on the transmission rod (3), the transmission rod (3) is provided with a slot (32), the lower side of the swing block (13) is inserted into the slot (32), and the fine-tuning screw (15) is screwed horizontally into the lower side of the swing block (13).

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

3. A contactor triggering system for a contactor according to claim 2, characterized in that: A transfer hole is provided at the lower end of the moving contact (4).

4. A contactor triggering system for a contactor 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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