阅读说明：本技术 一种动触点组件及具有该动触点组件的接触器 (Movable contact assembly and contactor with same ) 是由 陈建坤 邹明 于 2020-03-19 设计创作，主要内容包括：本发明提供了一种动触点组件,包括传动杆、固定支架和动触点,固定支架包括侧壁和底板,侧壁连接在底板的两侧,侧壁的上部设置有卡扣孔,底板固定连接在传动杆的上端,动触点的两侧设置有凸台,凸台插入卡扣孔中。本发明还提供一种包括上述动触点组件的接触器。本发明通过双臂结构固定动触点,保证动触点与静触点接触平稳,触点回跳小,有利于提高产品电寿命与机械寿命的能力,提高了接触器产品性能。(The invention provides a movable contact assembly which comprises a transmission rod, a fixed support and a movable contact, wherein the fixed support comprises side walls and a bottom plate, the side walls are connected to two sides of the bottom plate, the upper part of each side wall is provided with a clamping hole, the bottom plate is fixedly connected to the upper end of the transmission rod, two sides of the movable contact are provided with bosses, and the bosses are inserted into the clamping holes. The invention also provides a contactor comprising the movable contact assembly. The movable contact is fixed through the double-arm structure, so that the movable contact is ensured to be stably contacted with the static contact, the contact has small rebound, the electrical service life and the mechanical service life of a product are favorably improved, and the product performance of the contactor is improved.)

1. A movable contact assembly characterized by: the novel transmission rod comprises a transmission rod (3), a fixed support (4) and a movable contact (5), wherein the fixed support (4) comprises two side walls (401) and a bottom plate (402), the two side walls (401) are connected to two sides of the bottom plate (402) oppositely, a clamping hole (403) is formed in the upper portion of each side wall (401), the bottom plate (402) is fixedly connected to the upper end of the transmission rod (3), bosses (501) are arranged on two sides of the movable contact (5), and the bosses (501) are inserted into the clamping holes (403).

2. A movable contact assembly as recited in claim 1, wherein: the movable contact (5) is provided with a circular truncated cone (502), a first spring (6) is arranged between the movable contact (5) and the bottom plate (402), the upper end of the first spring (6) is attached to the movable contact (5), the upper end of the first spring (6) is sleeved on the outer ring of the circular truncated cone (502), the lower end of the first spring (6) is attached to the bottom plate (402), and the lower end of the first spring (6) is sleeved outside the upper end of the transmission rod (3).

3. A movable contact assembly as recited in claim 2, wherein: the transmission rod is characterized by further comprising an insulation plate (7) and an insulation ring (8), a through hole is formed in the center of the insulation plate (7), the insulation ring (8) is of a circular ring structure, the transmission rod (3) is a cylinder, a limiting circular truncated cone (301) protruding outwards is arranged on the upper portion of the transmission rod (3) close to the end face, the insulation plate (7) and the insulation ring (8) are sleeved on the upper end of the transmission rod (3), the insulation plate (7) is attached to the upper end face of the limiting circular truncated cone (301), a circular table (701) is arranged on the inner ring of the insulation plate (7), a hole (404) is formed in the center of the bottom plate (402), the outer ring of the circular table (701) is sleeved with the hole (404), the insulation ring (8) is attached to the upper end face of the circular table (701), and the lower.

4. A movable contact assembly as recited in claim 3, wherein: the height of the ring platform (701) is equal to the thickness of the bottom plate (402).

5. A movable contact assembly as recited in claim 3, wherein: the height of the ring platform (701) is larger than the thickness of the bottom plate (402), a step hole (802) is formed in the lower end of the insulating ring (8), and the outer ring of the ring platform (701) is sleeved with the step hole (802).

6. A movable contact assembly as recited in claim 3, wherein: the lower end of the insulating ring (8) is provided with a convex ring (803), the inner ring of the convex ring (803) is sleeved on the outer ring of the ring table (701), and the hole (404) is sleeved on the outer ring of the convex ring (803).

7. A movable contact assembly as recited in claim 3, wherein: the diameter of the outer ring of the insulating ring (8) is larger than that of the outer ring of the ring stand (701).

8. A movable contact assembly as recited in claim 3, wherein: the upper end of the insulating ring (8) is provided with a counter bore (801), a welding ring (9) is arranged in the counter bore, and the welding ring (9) is welded and fixed with the upper end of the transmission rod (3).

9. A movable contact assembly as recited in claim 1, wherein: the upper part of the side wall (401) where the buckling hole (403) is located is bent outwards.

10. A contactor comprising a movable contact assembly, a core (10), a second spring (11) and an armature (12), characterized in that: the movable contact assembly is the movable contact assembly of any one of claims 1 to 9, a through hole is formed in the center of the iron core (10), an annular groove matched with the limiting circular truncated cone (301) is formed in the upper end of the through hole of the iron core (10), the transmission rod (3) is inserted into and penetrates through the through hole of the iron core (10), the lower end of the transmission rod (3) is fixedly connected with the armature (12), a second spring (11) is arranged between the armature (12) and the iron core (10), and a stationary contact is arranged above the movable contact (5).

Technical Field

The invention belongs to the field of contactors, and particularly relates to a movable contact assembly and a contactor with the same.

Background

A contactor is an electronic control device having an input loop and an output loop, which is commonly used in automatic control circuits, and which is actually an "automatic switch" that uses a small current to control a large current. The circuit plays the roles of automatic cut-off, safety protection, circuit conversion and the like.

As shown in fig. 1, a first moving contact 1 of a contactor in the prior art is usually fixed on a transmission rod 3, and the transmission rod 3 drives the first moving contact 1 to move through electromagnetic attraction and spring restoring force, so as to realize attraction and disconnection of the first moving contact 1 and a fixed contact. The first movable contact 1 is usually fixed on the transmission rod 3 through an E-shaped clamp spring 2, although the operation is convenient, a gap exists in the structure of the E-shaped clamp spring 2, namely a single-arm fixing mode, so that the parallelism of the assembled first movable contact 1 is poor, when the movable contact is broken, the reverse acting force of the spring is completely concentrated on the E-shaped clamp spring 2, the E-shaped clamp spring 2 is not uniformly stressed, and therefore after the contact is repeatedly attracted and broken for many times, the E-shaped clamp spring 2 is deformed, the relative position of the first movable contact 1 of a product is changed, namely, the loosening or rotating phenomenon occurs, at the moment, the two ends of the first movable contact 1 are difficult to be ensured to be simultaneously contacted with corresponding static contacts, the contact rebound is large, and the electrical life and the mechanical life of the first movable contact 1 are reduced; even if the E-shaped clamp spring 2 falls off, the first movable contact 1 falls off, and the contactor fails.

Disclosure of Invention

In order to solve the technical problems, the invention provides the movable contact component and the contactor with the movable contact component, wherein the position of the movable contact is fixedly limited through a double-arm structure, so that the movable contact is ensured to be stably contacted with a fixed contact, the contact bounce is small, the capacity of prolonging the electrical service life and the mechanical service life of a product is facilitated, and the performance of the contactor is improved.

The invention is realized by the following technical scheme:

the movable contact assembly comprises a transmission rod, a fixed support and a movable contact, wherein the fixed support comprises two side walls and a bottom plate, the two side walls are connected to two sides of the bottom plate oppositely, a clamping hole is formed in the upper portion of each side wall, the bottom plate is fixedly connected to the upper end of the transmission rod, bosses are arranged on two sides of the movable contact, and the bosses are inserted into the clamping holes. Compared with the prior art, the movable contact is fixed by two arms, the parallelism of the assembled movable contact is increased, the bridge type contact is reliable and stable when the product is attracted, the product is ensured to move smoothly without abnormity, the movable contact and the static contact are in contact stably, the contact bounce is small, the capacity of prolonging the electrical life and the mechanical life of the product is facilitated, and the performance of a contactor product using the movable contact component is improved.

The movable contact is provided with a round table, a first spring is arranged between the movable contact and the bottom plate, the upper end of the first spring is attached to the movable contact, the upper end of the first spring is sleeved on the outer ring of the round table to limit the first spring to shake, the stability of the movable contact is improved, the lower end of the first spring is attached to the bottom plate, the lower end of the first spring is sleeved outside the upper end of the transmission rod, and the movable contact is guaranteed to be in stable contact with the fixed support under the action of the elastic force of the spring, so that the contact stability of the contact is guaranteed.

The movable contact assembly further comprises an insulating plate and an insulating ring, a through hole is formed in the center of the insulating plate, the insulating ring is a circular ring, the transmission rod is a cylinder, a limiting round table protruding outwards is arranged at the position, close to the end face, of the upper portion of the transmission rod, the insulating plate and the insulating ring are sleeved at the upper end of the transmission rod, the insulating plate is attached to the upper end face of the limiting round table, a ring table is arranged on the inner ring of the insulating plate, a hole is formed in the center of the bottom plate, the hole is sleeved on the outer ring of the ring table, the insulating ring is attached to the upper end face of the ring table, the insulating plate and the insulating ring separate the transmission rod from the bottom plate to guarantee the insulation and voltage resistance between the transmission rod and the bottom plate, the lower end of the first spring is sleeved on the outer side of the insulating ring, on one hand, the swinging of the first, the high-voltage load capacity of the product is realized.

The height of the ring platform is equal to the thickness of the bottom plate, so that the good isolation effect of the bottom plate and the transmission rod is ensured, and the insulation and voltage resistance between the transmission rod and the bottom plate are further ensured.

Different from the scheme, the height of the ring platform is larger than the thickness of the base plate, the lower end of the insulating ring is provided with a step hole, the outer ring of the ring platform is sleeved with the step hole, an extended creepage path is formed between the transmission rod and the base plate, the creepage path distance is increased, the voltage resistance is further improved, and the high-voltage load capacity of a contactor product is improved.

Different from the scheme, in another scheme, the lower end of the insulating ring is provided with a convex ring, the outer ring of the ring platform is sleeved with the inner ring of the convex ring, the outer ring of the convex ring is sleeved with the hole, and an extended creepage path is formed between the transmission rod and the bottom plate, so that the creepage path distance is increased, the voltage resistance is further improved, and the high-voltage load capacity of a contactor product is improved.

The diameter of the outer ring of the insulating ring is larger than that of the outer ring of the ring platform, so that the bottom plate is clamped between the insulating plate and the insulating ring.

The upper end of the insulating ring is provided with a counter bore, a welding ring is arranged in the counter bore, the welding ring is welded and fixed with the upper end of the transmission rod, the insulating plate and the insulating ring are fixed at the upper end of the transmission rod, a bottom plate clamped between the insulating plate and the insulating ring is fixed at the upper end of the transmission rod, the movable contact is fixed at the upper end of the transmission rod, and the movable contact moves along with the transmission rod.

The upper part of the side wall where the clamping hole is located is bent outwards, so that bosses on two sides of the movable contact can be conveniently inserted into the clamping hole.

The invention also provides a contactor comprising the movable contact assembly, and the contactor further comprises an iron core, a second spring and an armature, wherein a through hole is formed in the center of the iron core, a ring groove matched with the limiting circular truncated cone is formed in the upper end of the through hole of the iron core, a transmission rod is inserted into and penetrates through the through hole of the iron core, the lower end of the transmission rod is fixedly connected with the armature, the second spring is arranged between the armature and the iron core, and a stationary contact is arranged above the movable contact.

The invention has the beneficial effects that:

compared with the prior art, the movable contact is fixed through the double-arm structure, the bridge type contact is reliable and stable when the product is sucked, the smooth movement and the no abnormity of the action of the product are further ensured, the movable contact is stably contacted with the static contact, the contact bounce is small, the capacity of prolonging the electric service life and the mechanical service life of the product is facilitated, and the performance of a contactor product is improved. The spring is arranged between the movable contact and the fixed support, and under the action of the elastic force of the spring, the movable contact is ensured to be stably contacted with the fixed support, so that the contact stability of the contact is ensured. The insulating plate and the insulating ring are arranged to isolate the transmission rod from the bottom plate, so that the insulation and voltage resistance between the transmission rod and the bottom plate are ensured, and the high-voltage load capacity of a contactor product is realized. The creepage path distance between the transmission rod and the bottom plate is increased by arranging the lengthened creepage path, the voltage resistance is further improved, and the high-voltage load capacity of the contactor product is further improved.

Drawings

Fig. 1 is a schematic structural view of a moving contact assembly of a contactor in the prior art;

fig. 2 is a schematic structural diagram of the movable contact assembly in the first embodiment of the present invention;

fig. 3 is a cross-sectional view of the moving contact assembly in accordance with one embodiment of the present invention;

FIG. 4 is an enlarged view taken at I in FIG. 3;

FIG. 5 is a schematic structural diagram of a fixing bracket according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of the moving contact in the first embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an insulating plate according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an insulating ring according to an embodiment of the present invention;

fig. 9 is a cross-sectional view of the moving contact assembly in the second embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an insulating ring according to a second embodiment of the present invention;

fig. 11 is a cross-sectional view of the moving contact assembly in the third embodiment of the present invention;

FIG. 12 is a schematic structural diagram of an insulating ring according to a third embodiment of the present invention;

fig. 13 is a schematic structural diagram of a contactor according to a fourth embodiment of the present invention.

In the figure: 1-a first movable contact, 2-E type snap spring, 3-transmission rod, 4-fixed support, 5-movable contact, 6-a first spring, 7-insulating plate, 8-insulating ring, 9-welding ring, 10-iron core, 11-a second spring, 12-armature,

301-a limit round table,

401-side wall, 402-bottom plate, 403-snap hole, 404-hole,

501-a lug boss, 502-a circular truncated cone,

701-a ring platform, wherein the ring platform,

801-counter bore, 802-step bore, 803-convex ring.

Detailed Description

The preferred embodiments of the present invention will be further described with reference to the accompanying drawings, but the scope of the claimed invention is not limited thereto.