Moving-breaking contact system of contactor

Abstract

The present invention discloses a moving-breaking contact system of a contactor, which comprises a first housing, a moving contact support, a double "tongue" type spring seat, an unequal pitch cylindrical coil spring, a moving-breaking bridge-shaped contact and a second housing, wherein the moving contact support is arranged between the first housing and the second housing, two "U"-shaped connecting holes are provided on the opposite sides of the first housing and the second housing, two double "tongue" type spring seats are plugged between four "U"-shaped connecting holes, the moving-breaking bridge-shaped contact is fixedly connected to the top of the unequal pitch cylindrical coil spring, and the opposite sides of the first housing and the second housing are fixedly connected with a static contact. The moving-breaking contact system of the contactor ensures that the contact pressure of the moving-breaking bridge-shaped contact is stable and unchanged before the moving-breaking bridge-shaped contact is disconnected, and there is no false contact; when the moving-breaking bridge-shaped contact is disconnected, the disconnection speed is fast and the arcing time is short. When the contactor is released and opened, it can promote rapid opening and improve the contactor's breaking capacity.

Description

Technical Field

[0001] The invention relates to the technical field of contactors, in particular to a break contact system of a contactor. Background Art

[0002] The reaction spring of the moving contact of the domestic contactor is directly located between the moving bridge contact and the moving contact support. When the iron core drives the moving contact support to move, both ends of the reaction spring move accordingly. The overtravel of the contactor is an important guarantee to ensure that the contact can still make reliable contact after wear. During the closing process of the existing contactor, the pressure of the contact reaction spring decreases as the overtravel of the moving contact decreases, resulting in the lack of contact spring pressure during the overtravel reduction process, resulting in unreliable contact phenomena such as virtual contact, bounce, and arcing of the moving contact. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention discloses a break contact system of a contactor to solve the problems raised in the above background technology.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A moving-breaking contact system of a contactor, comprising a first housing, a moving contact support, a double "tongue" type spring seat, an unequal pitch cylindrical coil spring, a moving-breaking bridge contact and a second housing, wherein the moving contact support is fixedly connected to the bottom of the contactor, and the moving contact support is arranged between the first housing and the second housing, two "U"-shaped sockets are provided on the opposite sides of the first housing and the second housing, the number of the double "tongue" type spring seats is set to two, and the two double "tongue" type spring seats are plugged between the four "U"-shaped sockets, the number of the unequal pitch cylindrical coil springs is set to two, and the two unequal pitch cylindrical coil springs are arranged on the top of the two double "tongue" type spring seats, the moving-breaking bridge contact is fixedly connected to the top of the unequal pitch cylindrical coil spring, the opposite sides of the first housing and the second housing are fixedly connected with static contacts, and the upper surface of the moving-breaking bridge contact is in contact with the two static contacts.

[0007] Preferably, a cylindrical raised column is fixedly connected to the upper surface of the double "tongue" type spring seat, and a "tongue" type long socket and a "tongue" type short socket are fixedly connected to the two sides of the double "tongue" type spring seat respectively, the "tongue" type long socket is plugged into the "U" shaped socket of the second shell, and the "tongue" type short socket is plugged into the "U" shaped socket of the first shell.

[0008] Preferably, the unequal pitch cylindrical coil spring includes three parallel coils at the first end, three parallel coils at the second end and a middle spiral coil, the middle spiral coil is arranged between the three parallel coils at the first end and the three parallel coils at the second end, the three parallel coils at the first end are fixedly sleeved on the outer surface of the cylindrical raised column, and the three parallel coils at the second end are fixedly connected to the lower surface of the movable break bridge contact.

[0009] Preferably, the movable contact support is provided with a movable groove which passes through left and right, and two ends of the double "tongue" type spring seat pass through the movable groove and are respectively connected with two "U" shaped connecting holes.

[0010] The present invention discloses a break contact system of a contactor, which has the following beneficial effects:

[0011] The moving-breaking contact system of the contactor is connected with a double "tongue"-shaped spring seat through a "U"-shaped socket provided on the first shell and the second shell, and an unequal-pitch cylindrical coil spring is provided between the double "tongue"-shaped spring seat and the moving-breaking bridge-shaped contact that crosses the moving contact support, so that the overtravel of the moving-breaking contact is gradually reduced while the initial pressure remains unchanged during the closing process of the contactor, thereby ensuring reliable contact between the moving-breaking bridge-shaped contact and the static contact and preventing false contact; on the one hand, the fast breaking capacity of the moving-breaking contact is improved, the arcing time is shortened, and the electrical life of the contactor is increased; on the other hand, the energy storage capacity is increased for opening the contactor, the contactor opening speed is accelerated, and the contactor breaking capacity is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0014] Figure 3 It is a structural schematic diagram of the U-shaped socket in the first housing of the present invention;

[0015] Figure 4 It is a structural schematic diagram of the U-shaped socket in the second housing of the present invention;

[0016] Figure 5 It is a structural schematic diagram of the double "tongue" type spring seat of the present invention;

[0017] Figure 6 It is a structural schematic diagram of the connection between the double "tongue" type spring seat and the "U" type connector hole of the housing of the present invention;

[0018] Figure 7 It is a combined cross-sectional view of the first housing, the moving contact support, the double "tongue" type spring seat, the unequal pitch cylindrical helical springs and the moving breaking bridge contact of the present invention;

[0019] Figure 8 It is a schematic structural diagram of the unequal pitch cylindrical helical spring of the present invention.

[0020] In the figure: 1. first housing; 101. U-shaped socket; 2. moving contact support; 3. double "tongue" type spring seat; 301. cylindrical raised column; 302. "tongue" type long socket; 303. "tongue" type short socket; 4. unequal pitch cylindrical helical spring; 401. three parallel circles at the first end; 402. three parallel circles at the second end; 403. middle spiral wrap; 5. moving break bridge contact; 6. second housing; 7. static contact. DETAILED DESCRIPTION

[0021] The embodiment of the present invention discloses a break contact system of a contactor, such as Figure 1-8 As shown, it includes a first housing 1, a moving contact support 2, a double "tongue" type spring seat 3, an unequal pitch cylindrical coil spring 4, a moving broken bridge contact 5 and a second housing 6. The moving contact support 2 is fixedly connected to the bottom of the contactor, and the moving contact support 2 is arranged between the first housing 1 and the second housing 6. The first housing 1 and the second housing 6 have two "U" shaped sockets 101 on the opposite sides. The number of the double "tongue" type spring seats 3 is set to two, and the two double "tongue" type spring seats 3 are plugged between the four "U" shaped sockets 101. The number of the unequal pitch cylindrical coil springs 4 is set to two, and the two unequal pitch cylindrical coil springs 4 are arranged in two double At the top of the "tongue"-shaped spring seat 3, the moving-break bridge contact 5 is fixedly connected to the top of the unequal-pitch cylindrical coil spring 4, and the first shell 1 and the second shell 6 are fixedly connected on the opposite sides thereof with the static contact 7, and the upper surface of the moving-break bridge contact 5 is in contact with the two static contacts 7, so that the overtravel of the moving-break contact is gradually reduced while the initial pressure remains unchanged during the closing process of the contactor, thereby ensuring reliable contact between the moving-break bridge contact 5 and the static contact 7 to prevent false contact; on the one hand, the fast breaking capability of the moving-break bridge contact 5 is improved, the arcing time is shortened, and the electrical life of the contactor is prolonged; on the other hand, the energy storage capacity is increased for opening the contactor, the opening speed of the contactor is accelerated, and the opening capability of the contactor is improved.

[0022] The upper surface of the double "tongue" type spring seat 3 is fixedly connected with a cylindrical ridge column 301, and the two sides of the double "tongue" type spring seat 3 are respectively fixedly connected with a "tongue" type long socket 302 and a "tongue" type short socket 303. The "tongue" type long socket 302 is plugged into the "U" shaped socket 101 of the second shell 6, and the "tongue" type short socket 303 is plugged into the "U" shaped socket 101 of the first shell 1. The "U" shaped socket 101 of the first shell 1 and the second shell 6 play a positioning role on the double "tongue" type spring seat 3. The first shell 1 and the second shell 6 The depth of the U-shaped connector 101 ensures that the wall thickness of the first shell 1 and the second shell 6 is uniform, and the molding process of the first shell 1 and the second shell 6 is optimized. The "tongue"-shaped long socket 302 ensures that the double "tongue"-shaped spring seat 3 is reliably assembled with the second shell 6, and the "tongue"-shaped short socket 303 makes it convenient to assemble the double "tongue"-shaped spring seat 3 with the first shell 1, easy to align, reliable to engage, and improves the assembly efficiency.

[0023] The unequal pitch cylindrical coil spring 4 includes three parallel coils 401 at the first end, three parallel coils 402 at the second end and a middle spiral coil 403. The middle spiral coil 403 is arranged between the three parallel coils 401 at the first end and the three parallel coils 402 at the second end. The three parallel coils 401 at the first end are fixedly sleeved on the outer surface of the cylindrical raised column 301, and the three parallel coils 402 at the second end are fixedly connected to the lower surface of the movable break bridge contact 5.

[0024] The moving contact support 2 is provided with a movable groove which runs through the left and right sides, and the two ends of the double "tongue" type spring seat 3 pass through the movable groove and are respectively connected with two "U" shaped connecting holes 101. When the iron core of the contactor drives the moving contact support 2 to move, the double "tongue" type spring seat 3 and one end of the unequal pitch cylindrical coil spring 4 fixed on the double "tongue" type spring seat 3 do not move with the moving contact support 2.

[0025] Working principle: When the contactor is opened, the moving bridge contact 5 contacts the static contact 7 under the initial pressure of the unequal pitch cylindrical coil spring 4, and the gap between the moving bridge contact 5 and the moving contact support 2 is the overtravel of the moving bridge contact 5;

[0026] During the closing process of the contactor, the overtravel of the moving broken bridge contact 5 is reduced when the iron core drives the moving contact support 2 to move, and the unequal pitch cylindrical helical spring 4 is always in a compressed state and keeps the spring force unchanged during the overtravel of the moving broken bridge contact 5. After the overtravel of the moving broken bridge contact 5 is reduced to zero, the moving broken bridge contact 5 is gradually compressed under the drive of the moving contact support 2 until the contactor is closed, so that the overtravel of the moving broken bridge contact 5 is gradually reduced while the initial pressure remains unchanged during the closing process of the contactor, which ensures that the moving broken bridge contact 5 is in reliable contact with the static contact 7, prevents virtual contact, improves the fast breaking capacity of the moving broken bridge contact 5, shortens the arcing time, and improves the electrical life of the contactor.

[0027] During the contactor opening process, the compressed unequal pitch cylindrical helical spring 4 improves the energy storage capacity for the contactor opening, accelerates the contactor opening speed, and improves the contactor opening capacity.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A moving-break contact system of a contactor, comprising a first housing (1), a moving contact support (2), a double-tongue spring seat (3), an unequal pitch cylindrical coil spring (4), a moving-break bridge contact (5) and a second housing (6), characterized in that: The movable contact support (2) is fixedly connected to the bottom of the contactor, and the movable contact support (2) is arranged between the first housing (1) and the second housing (6); two "U"-shaped sockets (101) are provided on the opposite sides of the first housing (1) and the second housing (6); the number of the double "tongue"-shaped spring seats (3) is set to two, and the two double "tongue"-shaped spring seats (3) are plugged between the four "U"-shaped sockets (101); the number of the unequal pitch cylindrical helical springs (4) is set to two, and the two unequal pitch cylindrical helical springs (4) are arranged on the top of the two double "tongue"-shaped spring seats (3); the movable break bridge contact (5) is fixedly connected to the top of the unequal pitch cylindrical helical spring (4); the opposite sides of the first housing (1) and the second housing (6) are fixedly connected to the static contact (7), and the upper surface of the movable break bridge contact (5) is in contact with the two static contacts (7).

2. The moving-breaking contact system of the contactor according to claim 1, characterized in that: The upper surface of the double "tongue"-shaped spring seat (3) is fixedly connected to a cylindrical raised column (301), and the two sides of the double "tongue"-shaped spring seat (3) are respectively fixedly connected to a "tongue"-shaped long socket (302) and a "tongue"-shaped short socket (303), the "tongue"-shaped long socket (302) being plugged into a "U"-shaped socket (101) of the second housing (6), and the "tongue"-shaped short socket (303) being plugged into a "U"-shaped socket (101) of the first housing (1).

3. The moving-breaking contact system of the contactor according to claim 2, characterized in that: The unequal pitch cylindrical helical spring (4) comprises three parallel turns (401) at the first end, three parallel turns (402) at the second end, and a middle helical winding (403); the middle helical winding (403) is arranged between the three parallel turns (401) at the first end and the three parallel turns (402) at the second end; the three parallel turns (401) at the first end are fixedly sleeved on the outer surface of the cylindrical raised column (301); and the three parallel turns (402) at the second end are fixedly connected to the lower surface of the movable break bridge contact (5).

4. The moving-breaking contact system of the contactor according to claim 1, characterized in that: The movable contact support (2) is provided with a movable groove which passes through left and right, and two ends of the double "tongue"-shaped spring seat (3) pass through the movable groove and are respectively plugged into two "U"-shaped connecting holes (101).

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