阅读说明：本技术 一种触点装置及电磁开关 (Contact device and electromagnetic switch ) 是由 田晓康 陈太贤 赵福高 黄广明 于 2020-03-20 设计创作，主要内容包括：本申请涉及一种电磁开关,包括驱动装置和触点装置。触点装置包括动触头组件、基体以及间隔设置于基体顶部上的两个静触头。动触头组件包括隔离件、推杆、动触头和弹性件。推杆的一端安装于驱动装置上,且另一端安装于隔离件上。动触头安装于隔离件背向推杆的一侧。弹性件夹设于隔离件和动触头之间,使得动触头在推杆的作用下实现与一对静触头接触或分离。隔离件为塑料件且位于动触头和推杆之间的外壁间隔凸设有多个凸起。如此,通过在隔离件的外壁设置类似于绝缘子结构的凸起结构,增加了材料表面爬电距离,提高了电磁开关的绝缘能力。(The present application relates to an electromagnetic switch comprising a drive means and a contact means. The contact device comprises a moving contact component, a base body and two fixed contacts arranged on the top of the base body at intervals. The moving contact component comprises an isolating piece, a push rod, a moving contact and an elastic piece. One end of the push rod is installed on the driving device, and the other end of the push rod is installed on the isolating piece. The moving contact is arranged on one side of the isolating piece, which is back to the push rod. The elastic element is clamped between the isolating element and the moving contact, so that the moving contact is contacted with or separated from the pair of fixed contacts under the action of the push rod. The isolating piece is a plastic piece and is provided with a plurality of bulges at intervals and in a protruding mode on the outer wall between the moving contact and the push rod. Therefore, the outer wall of the isolating piece is provided with the protruding structure similar to the insulator structure, the creepage distance of the surface of the material is increased, and the insulating capacity of the electromagnetic switch is improved.)

A contact device comprises a hollow base body, two static contacts and a movable contact component, wherein an opening is formed in one side of the base body; the top of the base body is far away from the opening, and the two fixed contacts extend into the base body; characterized in that, the moving contact subassembly includes:

a spacer made of plastic;

one end of the push rod is arranged on the driving device, and the other end of the push rod is arranged on the isolating piece;

the moving contact is arranged on one side of the isolating piece, which is back to the push rod; and

the elastic element is clamped between the isolating element and the moving contact, so that the moving contact is contacted with or separated from the two fixed contacts under the action of the push rod;

the outer wall of the isolating piece between the moving contact and the push rod is convexly provided with a plurality of bulges at intervals.

The contact device according to claim 1, wherein the outer wall of the spacer is provided with a plurality of projections projecting at intervals in the axial direction of the push rod.

The contact device according to claim 2, wherein the plurality of protrusions are arranged in a ring shape or a spiral shape in an axial direction of the push rod.

A contact arrangement as claimed in any one of claims 1 to 3, wherein said spacer comprises a base portion, said movable contact and said push rod being mounted on opposite sides of said base portion; the periphery of the base part protrudes towards the direction close to the movable contact to form a cylinder wall surrounding the elastic part; the plurality of protrusions are spaced around the outer surface of the cartridge wall.

A contact arrangement as claimed in any one of claims 1 to 3, wherein said spacer comprises a base portion, said movable contact and said push rod being mounted on opposite sides of said base portion; the periphery of the base part protrudes towards the direction far away from the movable contact to form a cylinder wall surrounding the push rod; the plurality of protrusions are spaced around the outer surface of the cartridge wall.

A contact arrangement as claimed in any one of claims 1 to 3, wherein said spacer comprises a base portion, said movable contact and said push rod being mounted on opposite sides of said base portion; the plurality of projections are spaced around an outer wall of the base.

The contact assembly of any one of claims 4 to 6, wherein the movable contact assembly further comprises a mounting post and a retainer; one side of the base part close to the moving contact is provided with a positioning convex part; the elastic piece is sleeved on the positioning convex part and clamped between the moving contact and the base part; one end of the mounting rod is mounted on the positioning convex part, and the other end of the mounting rod penetrates through the moving contact and is clamped with the limiting part to limit the moving contact.

The contact assembly as recited in claim 7, wherein said movable contact assembly further comprises a contact guide; the contact guide sleeve comprises a shaft sleeve and a circular flange formed by extending one end of the shaft sleeve along the axial direction of the shaft sleeve in a protruding manner in the radial direction; the shaft sleeve is sleeved between the mounting rod and the moving contact; the flange is positioned between the moving contact and the limiting piece, and the area of the flange is larger than that of the limiting piece.

The contact assembly of any of claims 4-6, wherein the movable contact assembly further comprises a U-shaped cradle; a positioning convex part is arranged on one side of the base part close to the moving contact, and the elastic element is sleeved on the positioning convex part and clamped between the moving contact and the base part; the U-shaped bracket spans the moving contact, and the end part of the U-shaped bracket is connected with the base part or the cylinder wall.

An electromagnetic switch comprising a drive means; -characterized in that the electromagnetic switch further comprises a contact arrangement according to any of claims 1-9; the contact device is arranged on the driving device; the driving device controls the opening and closing of the contact device using an electromagnetic field generated by a coil.