A contactor contact mechanism

Abstract

This utility model discloses a contactor contact mechanism, relating to the field of contactor technology. It includes a base, with a mounting seat fixedly connected to the top of the base. A rotating shaft is rotatably mounted on the mounting seat, and a gear is fixedly fitted onto the rotating shaft. Two fixed seats are fixedly connected to both sides of the mounting seat, and the interior of each fixed seat has a T-shaped through slot. A contact assembly includes movable columns and two bases. The two movable columns movably pass through the through slots inside the two sets of fixed seats. A transmission plate is provided on one side of the front of each movable column, passing through the through slot. Multiple transmission teeth are provided on the opposite sides of the two transmission plates. This utility model effectively avoids localized overheating, material softening, and even adhesion of the contacts, and is less prone to uneven contact pressure distribution due to angular deviations or mechanical vibrations. It significantly improves the overall service life and safety of the contact mechanism, and has high practicality.

Description

Technical Field

[0001] This utility model relates to the field of contactor technology, and in particular to a contactor contact mechanism. Background Technology

[0002] A contactor is an automatic switching device that uses electromagnetic principles to control circuits. It uses a small current (a coil energized to generate a magnetic field) to drive mechanical contacts, thereby switching a large current main circuit on or off. Its core function is to control the switching of a large load current with a relatively small control current, and it is widely used in power control systems.

[0003] The moving and stationary contacts of a contactor are prone to wear during prolonged contact. In some existing contactors, the moving and stationary contacts usually make point contact, which further aggravates wear. At the same time, because the contact area is small, the temperature of the contact part rises too quickly, accelerating aging and reducing service life. Therefore, some contactor contact mechanisms with surface contact have been invented, as follows.

[0004] A search revealed a patent with publication number [number missing], which discloses a contactor contact mechanism, including a mounting plate. Several copper guide plates are installed within the mounting plate. A moving contact is mounted at the bottom of each copper guide plate, and a stationary contact is positioned below the moving contact. When the moving contact contacts the stationary contact, it is a surface contact. By configuring a fixed shaft, a rotating sleeve, a limiting plate, a mounting plate, copper guide plates, moving contacts, a connecting plate, and stationary contacts, a contact device is formed. This allows the moving contact to swing up and down, ensuring that the lower surface of the moving contact completely contacts the upper surface of the stationary contact when they make contact, thus forming a surface contact. This expands the contact connection and ensures that the moving and stationary contacts wear at a consistent rate, avoiding excessive localized wear. Simultaneously, it reduces the contact heating rate, slows down wear and aging, extends service life, and saves costs.

[0005] However, the contactor contact mechanism described above still has the following areas for improvement. For example, during operation, although the moving contact and the stationary contact can form surface contact, the moving contact swings downwards by rotating the mounting plate to form surface contact with the stationary contact, which is tilted at 13 degrees. However, this rotational contact method may cause the contact between the moving and stationary contacts to not be completed instantaneously and synchronously, but rather gradually expands from a certain edge to the entire contact surface. This gradual contact causes the first contacting part to bear the initial current impact and mechanical friction, resulting in a significantly faster wear rate in that area than in the later contacting area, and local wear... Wear and tear can lead to uneven contact surfaces, resulting in even more uneven current density distribution during subsequent contacts, creating a vicious cycle. After long-term operation, the contacts may experience localized overheating, material softening, or even adhesion. Although the 13-degree tilt design of the stationary contact ensures that a surface contact is ultimately formed, uneven contact pressure distribution may occur during the contact process due to angle deviation or mechanical vibration. If there is a slight offset when the moving contact swings, it may cause excessive local pressure, accelerating contact wear in that area. In summary, this will greatly reduce its overall service life. Therefore, there is an urgent need for a contactor contact mechanism to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model discloses a contactor contact mechanism. By providing a contact assembly, when the shaft rotates during operation, it can drive the gear to rotate. During gear transmission, it can cooperate with the transmission teeth on one side of the two transmission plates, as well as the guide and limit of the fixed seat on the transmission plates and the movable column, to synchronously drive the two movable columns to move in opposite directions. That is, when one movable column moves upward in a straight line, the other movable column will move downward in a straight line. Therefore, it can drive one of the top seats to move downward in a straight line until the moving contact below the top seat makes face-to-face contact with the corresponding stationary contact, and can form instantaneous synchronous surface contact. That is, all positions of the contact surface between the moving contact and the stationary contact can make contact synchronously. Therefore, it can effectively avoid the situation of severe local wear of the moving contact and the stationary contact, which would lead to unevenness of the contact surface. This effectively avoids the contact from local overheating, material softening, or even adhesion.

[0007] Meanwhile, during the contact process, it is less likely to cause uneven contact pressure distribution due to angular deviation or mechanical vibration, thereby effectively avoiding excessive local pressure and accelerated contact wear in that area. In summary, it greatly improves the overall service life and safety of the contact mechanism, thus solving the problems in the background technology.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] This utility model discloses a contactor contact mechanism, including a base, a mounting seat fixedly connected to the top of the base, a rotating shaft rotatably mounted on the mounting seat, a gear fixedly fitted on the rotating shaft, two fixed seats fixedly connected to both sides of the mounting seat, and a T-shaped through groove opened inside the fixed seat.

[0010] A contact assembly includes two movable columns and two bases. The two movable columns movably pass through through slots inside two sets of fixed seats. A transmission plate is provided on one side of the front of the movable column, and the transmission plate passes through the through slot. Multiple transmission teeth are provided on the opposite side of the two transmission plates. The two sets of transmission teeth are respectively meshed with the two sides of a gear. A top seat is fixedly connected to the bottom of the movable column. A copper guide plate is embedded in the bottom of the top seat. A moving contact is installed at the bottom of the copper guide plate. The two bases are slidably connected to the two sides of the movable column. A stationary contact is embedded in the top of the base. A stationary contact is provided at the top of the stationary contact. The stationary contact is located below the moving contact. The bottom of the moving contact and the top of the stationary contact are both planar contact surfaces.

[0011] A buffer mechanism is connected to the base.

[0012] Furthermore, the base is provided with multiple mounting ears around its perimeter, and mounting holes are provided at the mounting ears.

[0013] Furthermore, the outer walls of both the movable column and the transmission plate are fitted into the through groove, and the outer walls of both the movable column and the transmission plate are smooth surfaces.

[0014] Furthermore, a certain distance is provided between the top of the top seat and the fixed seat below, and a certain distance is also provided between the top of the movable column and the fixed seat above.

[0015] Furthermore, the bottom surface of the moving contact is parallel to the top surface of the stationary contact, and both the movable column and the transmission plate are perpendicular to the bottom surface of the moving contact.

[0016] Furthermore, the buffer mechanism includes springs, and the springs are provided in two sets. The bottom ends of the two sets of springs are fixedly connected to the top of the base, and the top ends of the two sets of springs are fixedly connected to the bottom of the two bases respectively. The springs are provided with telescopic guide rods inside, and the two ends of the telescopic guide rods are fixedly connected to the base and the base respectively.

[0017] The present invention has the following advantages over the prior art:

[0018] 1. This technical solution incorporates a contact assembly, which, during operation, drives the gears as the shaft rotates. The gear transmission causes the two moving contacts in the contact assembly to move synchronously up and down. When one of the moving contacts contacts the stationary contact, the two contacts are parallel, and the moving contact moves vertically up and down, creating instantaneous synchronous surface contact. This effectively prevents severe localized wear on the moving and stationary contacts, thus avoiding unevenness on the contact surface. It also prevents localized overheating, material softening, or even adhesion of the contacts. Furthermore, it minimizes uneven pressure distribution due to angular deviations or mechanical vibrations during contact, preventing excessive localized pressure and accelerated wear in those areas. Overall, this significantly improves the service life and safety of the contact mechanism, making it highly practical.

[0019] 2. This technical solution incorporates a buffer mechanism, which effectively buffers and weakens the rigid impact force generated between the moving and stationary contacts when the moving contact moves down to contact the stationary contact surface during operation. Furthermore, the rigid compressive force between the two contacts is converted into elastic compressive force, thereby further protecting both the moving and stationary contacts and effectively preventing damage caused by rigid impact and compressive forces. This significantly improves the overall service life of the contact mechanism and demonstrates high practicality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0023] Figure 3 This is a schematic diagram of the exploded structure of the movable column installation of this utility model;

[0024] Figure 4 A sectional view of the installation structure of the moving contact and stationary contact of this utility model;

[0025] Figure 5 This is an exploded view of the telescopic guide rod installation structure of this utility model.

[0026] In the diagram: 1. Base; 2. Mounting seat; 3. Rotating shaft; 4. Gear; 5. Fixed seat; 6. Through slot; 7. Contact assembly; 701. Moving column; 702. Base; 703. Transmission plate; 704. Transmission gear; 705. Top seat; 706. Copper guide plate; 707. Moving contact; 708. Stationary contact; 709. Stationary contact; 8. Buffer mechanism; 801. Spring; 802. Telescopic guide rod; 9. Mounting ear. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "surface", "side", "gap", "peripheral", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Reference Figures 1-5 A contactor contact mechanism includes a base 1, a mounting seat 2 fixedly connected to the top of the base 1, a rotating shaft 3 rotatably mounted on the mounting seat 2, a gear 4 fixedly fitted on the rotating shaft 3, and two fixed seats 5 fixedly connected to both sides of the mounting seat 2. The fixed seats 5 have T-shaped through grooves 6 inside.

[0030] The contact assembly 7 includes two movable columns 701 and two bases 702. The two movable columns 701 movably pass through the through slots 6 inside the two sets of fixed seats 5. A transmission plate 703 is provided on one side of the front of each movable column 701, passing through the through slots 6. Multiple transmission teeth 704 are provided on opposite sides of each of the two transmission plates 703. The two sets of transmission teeth 704 mesh with the two sides of the gear 4. A top seat 70 is fixedly connected to the bottom end of each movable column 701. 5. A copper guide plate 706 is embedded in the bottom of the top seat 705. A moving contact 707 is installed at the bottom of the copper guide plate 706. Two bases 702 are slidably connected to the two sides of the movable column 701 respectively. A stationary contact 708 is embedded in the top of the base 702. A stationary contact 709 is provided on the top of the stationary contact 708. The stationary contact 709 is located below the moving contact 707. The bottom of the moving contact 707 and the top of the stationary contact 709 are both planar contact surfaces. A buffer mechanism 8 is connected to the base 702.

[0031] The base 1 has multiple mounting ears 9 around its perimeter, and mounting holes are provided at the mounting ears 9; the outer walls of the movable column 701 and the transmission plate 703 are both in contact with the through groove 6, and the outer walls of the movable column 701 and the transmission plate 703 are both smooth surfaces; there is a certain distance between the top of the top seat 705 and the fixed seat 5 located below, and there is also a certain distance between the top of the movable column 701 and the fixed seat 5 located above; the bottom surface of the moving contact 707 is parallel to the top surface of the stationary contact 709, and the movable column 701 and the transmission plate 703 are both perpendicular to the bottom surface of the moving contact 707;

[0032] The buffer mechanism 8 includes a spring 801, which is provided in two sets. The bottom ends of the two sets of springs 801 are fixedly connected to the top of the base 1, and the top ends of the two sets of springs 801 are fixedly connected to the bottom of the two bases 702 respectively. The spring 801 is provided with a telescopic guide rod 802 inside, and the two ends of the telescopic guide rod 802 are fixedly connected to the base 1 and the base 702 respectively.

[0033] In the specific implementation process, when the rotating shaft 3 rotates, it can drive the gear 4 to rotate. When the gear 4 is in operation, it can cooperate with the transmission teeth 704 on one side of the two transmission plates 703, and the guide limit of the fixed seat 5 on the transmission plate 703 and the movable column 701, synchronously driving the two movable columns 701 to move in opposite directions. That is, when one movable column 701 moves upward in a straight line, the other movable column 701 will move downward in a straight line. Therefore, it can drive one of the top seats 705 to move downward in a straight line until the moving contact 707 below the top seat 705 makes face-to-face contact with the corresponding stationary contact 709, and can form an instantaneous synchronous motion. The step-by-step contact means that all positions of the contact surfaces of the moving contact 707 and the stationary contact 709 can make contact simultaneously. Therefore, it can effectively avoid the situation where the moving contact 707 and the stationary contact 709 suffer severe local wear, which would lead to unevenness of the head surface. This effectively avoids local overheating, material softening, or even adhesion of the contacts. At the same time, it is not easy for uneven contact pressure distribution to occur due to angular deviation or mechanical vibration during the contact process. This effectively avoids excessive local pressure and accelerated wear of the contacts in that area. In summary, it greatly improves the overall service life and safety of the contact mechanism.

[0034] Furthermore, during operation, when the moving contact moves down to contact the surface of the stationary contact 708, the compression of the spring 801 and the retraction of the telescopic guide rod 802 can effectively buffer and weaken the rigid impact force generated between the moving contact and the stationary contact 708, and convert the rigid extrusion force between the two into elastic extrusion force. This can further protect the stationary contact 708 and the moving contact, effectively preventing them from being damaged by rigid impact force and rigid extrusion force, thereby further improving the overall service life of the contact mechanism.

[0035] The base 1 has multiple mounting ears 9 around its perimeter. The mounting ears 9 have mounting holes to facilitate the installation and fixation of the base 1 to the target carrier.

[0036] The outer walls of the movable column 701 and the transmission plate 703 are fitted with the through groove 6 to ensure the overall stability of the movable column 701 and the transmission plate 703. The outer walls of the movable column 701 and the transmission plate 703 are smooth to reduce the sliding friction between the movable column 701 and the transmission plate 703 and the through groove 6, thereby reducing wear.

[0037] It is understandable that balls or rollers can be added to the inner wall of the through groove 6 to contact the movable column 701 and the transmission plate 703, thereby converting sliding friction into rolling friction and further reducing wear. This is an existing technology application and will not be elaborated on here.

[0038] The top of the top seat 705 is provided with a certain distance from the bottom of the fixed seat 5 below, and the top of the movable column 701 is also provided with a certain distance from the top of the fixed seat 5 above, so as to ensure that the top seat 705 can move up and down a certain distance, thereby driving the movable contact 707 to move up and down a certain distance.

[0039] The bottom surface of the moving contact 707 is parallel to the top surface of the stationary contact 709, and the moving column 701 and the transmission plate 703 are both perpendicular to the bottom surface of the moving contact 707 in order to ensure that the moving contact 707 can form instantaneous synchronous surface contact with the stationary contact 709 after it moves down.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A contactor contact mechanism, comprising a base (1), characterized in that: The base (1) is fixedly connected to the top of the mounting base (2), and a rotating shaft (3) is rotatably installed at the mounting base (2). A gear (4) is fixedly fitted at the rotating shaft (3). Two fixed seats (5) are fixedly connected to both sides of the mounting base (2). A T-shaped through groove (6) is opened inside the fixed seat (5). The contact assembly (7) includes a movable column (701) and a base (702). Two movable columns (701) and two bases (702) are provided. The two movable columns (701) respectively move through the through slots (6) inside the two sets of fixed seats (5). A transmission plate (703) is provided on one side of the front of each movable column (701). The transmission plate (703) passes through the through slot (6). Multiple transmission teeth (704) are provided on opposite sides of each of the two transmission plates (703). The two sets of transmission teeth (704) mesh with both sides of the gear (4). The movable column (701)... 1) The bottom end is fixedly connected to a top seat (705). A copper guide plate (706) is embedded in the bottom of the top seat (705). A moving contact (707) is installed at the bottom of the copper guide plate (706). The two bases (702) are slidably connected to the two sides of the movable column (701). A stationary contact (708) is embedded in the top of the base (702). A stationary contact (709) is provided at the top of the stationary contact (708). The stationary contact (709) is located below the moving contact (707). The bottom of the moving contact (707) and the top of the stationary contact (709) are both planar contact surfaces. A buffer mechanism (8) is connected to a base (702).

2. The contactor contact mechanism according to claim 1, characterized in that: The base (1) is provided with a plurality of mounting ears (9) around its perimeter, and mounting holes are provided at the mounting ears (9).

3. The contactor contact mechanism according to claim 1, characterized in that: The outer walls of the movable column (701) and the transmission plate (703) are both in contact with the through groove (6), and the outer walls of the movable column (701) and the transmission plate (703) are both smooth surfaces.

4. A contactor contact mechanism according to claim 1, characterized in that: There is a certain distance between the top of the top seat (705) and the fixed seat (5) below it, and there is also a certain distance between the top of the movable column (701) and the fixed seat (5) above it.

5. A contactor contact mechanism according to claim 1, characterized in that: The bottom surface of the moving contact (707) is parallel to the top surface of the stationary contact (709), and the movable column (701) and the transmission plate (703) are both perpendicular to the bottom surface of the moving contact (707).

6. A contactor contact mechanism according to claim 1, characterized in that: The buffer mechanism (8) includes a spring (801), which is provided in two sets. The bottom ends of the two sets of springs (801) are fixedly connected to the top of the base (1), and the top ends of the two sets of springs (801) are fixedly connected to the bottom of the two bases (702). The spring (801) is provided with a telescopic guide rod (802) inside, and the two ends of the telescopic guide rod (802) are fixedly connected to the base (1) and the base (702) respectively.

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