CN-224204054-U - Change-over switch

CN224204054UCN 224204054 UCN224204054 UCN 224204054UCN-224204054-U

Abstract

The application discloses a change-over switch, which relates to the technical field of electrical switches. The contact support is arranged on the shell in a sliding way along the axial direction, and the contact support is provided with a linkage hole. The fixed contact is fixedly arranged on the shell. The contact bridge is movably arranged on the contact support. The rocking arm includes integrated into one piece's first arm of force, rotation portion and second arm of force, first arm of force with second arm of force interval distribution in the week side of rotation portion, rotation portion rotate connect in the casing. And the tail end of the second force arm is provided with a linkage column, and the linkage column is rotationally connected with the linkage hole. The first force arm is stressed to enable the rocker arm to rotate, and the second force arm drives the contact to support sliding through the cooperation of the linkage column and the linkage hole, so that the contact bridge is contacted with and separated from the fixed contact. The change-over switch provided by the application can simplify the structure and improve the assembly efficiency.

Inventors

LI XINYE
LI WEIWEI
ZHENG TIANYUN

Assignees

德力西电气有限公司

Dates

Publication Date: 20260505
Application Date: 20250425

Claims (8)

1. A transfer switch, comprising: A housing; The contact support is axially and slidably arranged on the shell and is provided with a linkage hole; the fixed contact is fixedly arranged on the shell; The contact bridge is movably arranged on the contact support; The rocker arm comprises a first force arm, a rotating part and a second force arm which are integrally formed, the first force arm and the second force arm are distributed on the periphery of the rotating part at intervals, and the rotating part is rotationally connected with the shell; a linkage column is arranged at the tail end of the second force arm and is rotationally connected with the linkage hole; The first force arm is stressed to enable the rocker arm to rotate, and the second force arm drives the contact to support sliding through the cooperation of the linkage column and the linkage hole, so that the contact bridge is contacted with and separated from the fixed contact.
2. The transfer switch of claim 1, wherein in the process of rotating the second force arm around the rotating portion, the linkage column applies a composite acting force to a hole wall of the linkage hole, and the composite acting force is decomposed into: A first component along the contact support sliding direction; A second component having a predetermined angle alpha with the first component; The first component force drives the contact support to slide along the axial direction so as to realize the contact or separation of the contact bridge and the fixed contact, the second component force is used for enabling the contact support to generate radial offset, and the contact support generates radial offset so that the contact bridge in a contact state and the fixed contact generate relative sliding friction so as to remove impurities on a contact surface.
3. A diverter switch as claimed in claim 2, characterized in that the preset angle α is greater than 0 ° and less than 90 °.
4. The transfer switch of claim 1, wherein the housing is provided with a guide rail, the contact support is provided with a chute, the guide rail is slidably connected to the chute, the guide rail is in clearance fit with the chute, and the clearance is adapted to the radially deflectable distance of the contact support.
5. The transfer switch of claim 1, wherein the contact support is provided with a mounting hole, a guide rib is arranged on a hole wall of the mounting hole, the contact bridge is arranged in the mounting hole in a penetrating manner, the contact bridge is provided with a guide groove, and the contact bridge is slidably connected to the guide rib through the guide groove.
6. The transfer switch of claim 5, wherein the guide rib comprises a first section and a second section connected to each other, the first section extends in the same direction as the sliding direction supported by the contact, the second section is bent based on the first section, and the contact bridge moves from the first section to the second section to generate relative sliding with the fixed contact.
7. The transfer switch of any one of claims 1-6, wherein the distance from the end of the first arm to the center of rotation of the rotating portion is a, the distance from the end of the second arm to the center of rotation of the rotating portion is b, and the ratio of lever ratios of the rocker arms ranges from b to a being greater than or equal to 1.5 and less than or equal to 2.
8. The transfer switch of any one of claims 1-6, wherein the rotating portion includes a shaft body and a mounting groove provided in the shaft body, the housing is provided with a rotating shaft hole, the shaft body is rotatably connected to the rotating shaft hole, a torsion spring is mounted in the mounting groove, the torsion spring includes a first torsion arm fixedly connected to the housing and a second torsion arm fixedly connected to the rotating portion, and the first force arm is stressed to rotate the rotating portion so as to compress the torsion spring.

Description

Change-over switch Technical Field The application relates to the technical field of electrical switches, in particular to a change-over switch. Background Two coils in the double coil contactor, one of which is a start coil for actuation and the other is a hold coil for holding. After the contactor completes the suction action, the starting coil is required to be disconnected and the holding coil is required to be connected through the change-over switch, so that the energy consumption of the contactor is optimized, and the reliability is improved. The existing change-over switch comprises a transmission part, a moving contact, a fixed contact, a contact support and a reset spring, wherein the transmission part is used for transmitting motion to the contact support, the contact support drives the moving contact to contact with the fixed contact, and the reset spring is used for reversely driving the contact support to drive the moving contact to separate from the fixed contact. The existing change-over switch has a large number of parts, and is inconvenient to realize rapid assembly. Therefore, it is needed to provide a transfer switch to solve the problems of the prior art. Disclosure of utility model The application aims to provide a change-over switch which can simplify the structure and improve the assembly efficiency. The embodiment of the application provides a change-over switch which comprises a shell, a contact support, a fixed contact, a contact bridge and a rocker arm. The contact support is arranged on the shell in a sliding way along the axial direction, and the contact support is provided with a linkage hole. The fixed contact is fixedly arranged on the shell. The contact bridge is movably arranged on the contact support. The rocking arm includes integrated into one piece's first arm of force, rotation portion and second arm of force, and first arm of force and second arm of force interval distribution are in the week side of rotation portion, and rotation portion rotates to be connected in the casing. The end of the second force arm is provided with a linkage column which is rotationally connected with the linkage hole. The first force arm is stressed to enable the rocker arm to rotate, and the second force arm drives the contact to support sliding through the cooperation of the linkage column and the linkage hole, so that the contact bridge is contacted with and separated from the fixed contact. Through setting up the linkage post on the second arm of force, set up the linkage hole on the contact supports, adopt the linkage post to peg graft in the connected form of linkage hole, can be in the rocking arm rotation in-process, drive the contact support according to the direction of rotation of rocking arm and move to the direction that is close to the stationary contact or keeps away from the stationary contact, need not to set up independent reset spring drive contact support, simplified structure and assembly operation, be favorable to improving assembly efficiency. In some examples, the second force arm applies a composite force to the wall of the linkage hole during rotation of the second force arm around the rotation portion, the composite force being decomposed into a first component along the contact support sliding direction and a second component having a predetermined angle α with the first component. The first component force drives the contact support to axially slide so as to realize the contact or separation of the contact bridge and the fixed contact, the second component force is used for enabling the contact support to generate radial offset, and the contact support generates radial offset so that the contact bridge in a contact state and the fixed contact generate relative sliding friction so as to remove impurities on a contact surface. Under the structural cooperation of linkage post and linkage hole, the second arm of force is to contact support the compound effort of applyingnot only can promote the contact support to slide to touch bridge and static contact, can also make the contact support take place radial deviation in the slip in-process, touch bridge is along with the contact support in-process of skew, touch the contact on the bridge and the static contact takes place the friction to clear away the impurity of contact position, adopts this kind of setting form to need not to set up extra part or structure, can realize above-mentioned function, has effectively improved change over switch's stability in use when not influencing assembly efficiency. In some examples, the preset angle α is greater than 0 ° and less than 90 °. The preset included angle alpha between the first component force and the second component force is designed in the range, so that the contact support can obtain enough linear motion driving force when sliding along the axial direction, the basic contact function of the contact bridge and the fixed contact is reliably completed, meanwhile, the c