Movable contact assembly for contactor

Abstract

The movable contact assembly comprises a push rod, a first silicon steel sheet and a second silicon steel sheet, the upper portion of the push rod is connected with a bearing plate through a limiting bolt, clamping grooves are formed in the left side and the right side of the bearing plate, movable contact pieces are inserted into the clamping grooves, a carrying plate is arranged at the upper end of the push rod, and the upper end of the carrying plate is provided with a movable contact. A clamping supporting plate is arranged above the carrying plate, limiting pins are arranged on the left side and the right side of the upper end face of the clamping supporting plate, hole grooves for the limiting pins to be inserted are formed in the movable contact piece, a lower bottom plate is arranged in the second silicon steel sheet, an electromagnetic coil is arranged on the lower bottom plate, an upper bottom plate is arranged above the electromagnetic coil, and the upper bottom plate is inserted into the push rod in a penetrating mode. The lower portion of the push rod is movably sleeved with a reset spring which is arranged on the inner side of the first silicon steel sheet. According to the invention, in the process that the moving contact is close to the static contact, the moving contact can be effectively prevented from tilting upwards, so that poor contact of the contactor can be avoided, and the stable effect of the contactor is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a moving contact assembly for a contactor. Background Art

[0002] Contactor is an automatic control device. It is mainly used to frequently connect or disconnect AC and DC circuits. It has large control capacity and can be operated remotely. It can be used with relays to achieve timing operation, interlocking control, various quantitative control and loss and undervoltage protection. It is widely used in automatic control circuits. Its main control object is the motor. It can also be used to control other power loads, such as electric heaters, lighting, electric welding machines, capacitor banks, etc.

[0003] In the prior art, the moving contact of the contactor is often fixed on the transmission rod, and the transmission rod drives the moving contact to move through electromagnetic attraction and spring restoring force to achieve the attraction and disconnection of the moving contact and the static contact. In the moving contact assembly, the frequent contact between the moving contact and the static contact will cause the moving contact to bend upward, resulting in poor contact of the contactor. In view of this, we propose a moving contact assembly for a contactor. Utility Model Content

[0004] The purpose of the utility model is to provide a moving contact assembly for a contactor, so as to solve the problem that the moving contact of the contactor in the prior art mentioned in the above background technology is often fixed on the transmission rod, and the transmission rod drives the moving contact to move through electromagnetic suction and spring restoring force to achieve the attraction and disconnection of the moving contact and the static contact. In the moving contact assembly, the frequent contact between the moving contact and the static contact will cause the moving contact to be tilted upward, resulting in poor contact of the contactor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a moving contact assembly for a contactor, comprising a push rod, a silicon steel sheet one and a silicon steel sheet two, the push rod being connected to a carrying plate through a limit bolt at the top, the carrying plate having a clamping groove on both sides, a moving contact piece being inserted into the clamping groove, a carrying plate being provided at the upper end of the push rod, a clamping support plate being provided above the carrying plate, limit pins being provided on the left and right sides of the upper end surface of the clamping support plate, a hole groove for inserting the limit pin being provided on the moving contact piece, a lower bottom plate being provided inside the silicon steel sheet two, an electromagnetic coil being provided on the lower bottom plate, an upper bottom plate being provided above the electromagnetic coil, an upper bottom plate being inserted into the push rod, a reset spring being movably sleeved at the bottom of the push rod, and the reset spring being provided on the inner side of the silicon steel sheet one.

[0006] Preferably, a screw hole for connecting with a limiting bolt is formed at the upper end of the push rod, and the length of the screw hole is longer than the limiting bolt.

[0007] Preferably, a countersunk hole is provided in the middle of the bearing plate, and the limiting bolt is movably inserted into the countersunk hole.

[0008] Preferably, the clamping support plate is movably sleeved on the push rod, and the clamping support plate is arranged below the bearing plate.

[0009] Preferably, the longitudinal section of the snap-fit ​​groove is a "T"-shaped groove, and adjacent snap-fit ​​grooves are not connected.

[0010] Preferably, the countersunk hole is arranged between adjacent snap-fit ​​grooves.

[0011] Preferably, the clamping support plate is arranged between the load-bearing plate and the mounting plate, and the clamping support plate and the load-bearing plate are parallel to each other.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The movable contact assembly for the contactor is provided with a bearing plate above the push rod, and the movable contact piece is provided on the bearing plate. After the limit bolt is rotated, the bearing plate gradually approaches the support handle. At this time, the clamping support plate can be tightly clamped between the mounting plate and the bearing plate under the driving action of the bearing plate, and the upper limit pin on the clamping support plate is clamped into the movable contact piece, which can further limit the position of the movable contact piece. Moreover, by providing the bearing plate, the movable contact piece can be effectively prevented from tilting upward in the process of approaching the static contact piece, thereby avoiding the occurrence of poor contact of the contactor and ensuring the stability of the contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a partial half-section structure schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the load-bearing plate of the utility model;

[0017] Figure 4 This is a schematic diagram of the push rod structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the structure of the clamping support plate of the utility model.

[0019] In the figure: 1. push rod; 11. mounting plate; 12. screw hole; 2. bearing plate; 21. snap-in groove; 22. countersunk hole; 3. moving contact piece; 41. silicon steel sheet one; 42. silicon steel sheet two; 43. electromagnetic coil; 44. lower base plate; 45. upper base plate; 46. reset spring; 5. limit bolt; 6. snap-in support plate; 61. limit pin. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example: See Figure 1-5 The utility model provides a technical solution: a moving contact assembly for a contactor, mainly for the prior art that the moving contact of the contactor is often fixed on a transmission rod, and the transmission rod drives the moving contact to move through electromagnetic suction and spring restoring force to achieve the attraction and disconnection of the moving contact and the static contact. In the moving contact assembly, the frequent contact between the moving contact and the static contact will cause the moving contact to be warped, so that the problem of poor contact of the contactor is improved. The specific scheme is as follows: it includes a push rod 1, a silicon steel sheet 1 41 and a silicon steel sheet 2 42, the top of the push rod 1 is connected to the bearing plate 2 through a limit bolt 5, and the upper end of the push rod 1 is provided with a screw hole 12 for connecting with the limit bolt 5, and the length of the screw hole 12 is longer than the limit bolt 5. After rotating the limit bolt 5, the bearing plate 2 gradually approaches the support handle 1, further improving the fixing stability of the bearing plate 2.

[0022] See also Figure 1 , Figure 2 and Figure 3 , wherein a countersunk hole 22 is provided in the middle of the carrier plate 2, and the limit bolt 5 is movably inserted in the countersunk hole 22. The carrier plate 2 has a clamping groove 21 on both sides, and the longitudinal section of the clamping groove 21 is a "T"-shaped groove, and adjacent clamping grooves 21 are not connected. The countersunk hole 22 is provided between adjacent clamping grooves 21. The countersunk hole 22 can facilitate the clamping of the limit bolt 5 on the carrier plate 2.

[0023] Furthermore, a moving contact piece 3 is inserted in the clamping groove 21, a carrying plate 11 is provided at the upper end of the push rod 1, a clamping support plate 6 is provided above the carrying plate 11, the clamping support plate 6 is provided between the load-bearing plate 2 and the carrying plate 11, and the clamping support plate 6 and the load-bearing plate 2 are parallel to each other, and the clamping support plate 6 is movably sleeved on the push rod 1, and the clamping support plate 6 is provided below the load-bearing plate 2. Among them, the carrying plate 11 and the push rod 1 are integrally processed, and the carrying plate 11 can play a role in supporting the clamping support plate 6.

[0024] See also Figure 5 and Figure 2, limit pins 61 are provided on the left and right sides of the upper end surface of the clamping support plate 6, and a hole groove for inserting the limit pins 61 is opened on the moving contact piece 3. After the limit bolt 5 is rotated, the bearing plate 2 gradually approaches the support handle 1. At this time, the clamping support plate 6 can be tightly clamped between the carrying plate 11 and the bearing plate 2 under the driving action of the bearing plate 2, and the limit pin 61 on the clamping support plate 6 is clamped into the moving contact piece 3, which can further limit the position of the moving contact piece 3 and further ensure the position of the moving contact piece 3. In addition, through the setting of the bearing plate 2, the upward tilting of the moving contact piece 3 can be effectively prevented in the process of the moving contact piece 3 approaching the static contact piece, thereby avoiding the occurrence of poor contact of the contactor and ensuring the stability of the contactor.

[0025] A lower bottom plate 44 is provided inside the second silicon steel sheet 42, an electromagnetic coil 43 is provided on the lower bottom plate 44, an upper bottom plate 45 is provided above the electromagnetic coil 43, the upper bottom plate 45 is inserted into the push rod 1, a return spring 46 is movably sleeved below the push rod 1, and the return spring 46 is provided on the inner side of the first silicon steel sheet 41.

[0026] Working principle: This type of moving contact assembly for the contactor, by rotating the limit bolt 5, the bearing plate 2 gradually approaches the support handle 1, at this time, the clamping support plate 6 can be tightly clamped between the mounting plate 11 and the bearing plate 2 under the driving action of the bearing plate 2, and the upper limit pin 61 on the clamping support plate 6 is clamped into the moving contact piece 3, which can further limit the position of the moving contact piece 3, and through the setting of the bearing plate 2, the moving contact piece 3 can be effectively prevented from tilting upward during the process of the moving contact piece 3 approaching the static contact piece, thereby avoiding the occurrence of poor contact of the contactor and ensuring the stability of the contactor.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A moving contact assembly for a contactor, comprising a push rod (1), a first silicon steel sheet (41) and a second silicon steel sheet (42), characterized in that: The upper part of the push rod (1) is connected to the bearing plate (2) through a limiting bolt (5), and the left and right sides of the bearing plate (2) are provided with a clamping groove (21), and a moving contact piece (3) is inserted into the clamping groove (21). The upper end of the push rod (1) is provided with a carrying plate (11), and a clamping support plate (6) is provided above the carrying plate (11). The upper end surface of the clamping support plate (6) is provided with a limiting pin (61) on both sides, and the moving contact piece (3) is provided with a hole groove for inserting the limiting pin (61). The silicon steel sheet (42) is provided with a lower bottom plate (44), and an electromagnetic coil (43) is provided on the lower bottom plate (44). An upper bottom plate (45) is provided above the electromagnetic coil (43). The upper bottom plate (45) is inserted into the push rod (1), and a reset spring (46) is movably sleeved at the lower part of the push rod (1), and the reset spring (46) is arranged on the inner side of the silicon steel sheet (41).

2. A moving contact assembly for a contactor according to claim 1, characterized in that: The upper end of the push rod (1) is provided with a screw hole (12) for connecting with the limiting bolt (5), and the length of the screw hole (12) is longer than the limiting bolt (5).

3. The movable contact assembly for a contactor according to claim 1, characterized in that: A countersunk hole (22) is provided in the middle of the bearing plate (2), and the limiting bolt (5) is movably inserted into the countersunk hole (22).

4. The movable contact assembly for a contactor according to claim 1, characterized in that: The clamping support plate (6) is movably sleeved on the push rod (1), and the clamping support plate (6) is arranged below the bearing plate (2).

5. The movable contact assembly for a contactor according to claim 1, characterized in that: The longitudinal section of the clamping groove (21) is a "T"-shaped groove, and adjacent clamping grooves (21) are not connected.

6. The movable contact assembly for a contactor according to claim 3, characterized in that: The countersunk holes (22) are arranged between adjacent clamping grooves (21).

7. The movable contact assembly for a contactor according to claim 1, characterized in that: The clamping support plate (6) is arranged between the load-bearing plate (2) and the mounting plate (11), and the clamping support plate (6) and the load-bearing plate (2) are parallel to each other.

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