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CN-224232533-U - Trigger mechanism for travel switch

CN224232533UCN 224232533 UCN224232533 UCN 224232533UCN-224232533-U

Abstract

The utility model relates to a trigger mechanism for a travel switch, which comprises an operation shaft (1), a trigger pressing block (2) arranged on the operation shaft (1) and a travel switch (3) matched with the trigger pressing block (2) to realize the monitoring of the rotation of the operation shaft (1), and is characterized in that the outer contour of the trigger pressing block (2) is of a symmetrical curved surface structure and comprises a first circular arc (4), involute (5) and a second circular arc (6) which are sequentially and symmetrically connected to the two ends of the first circular arc (4), and the distance between any outer contour point of the trigger pressing block (2) and the rotation axis of the trigger pressing block (2) is not larger than the radius of the first circular arc (4) and not smaller than the radius of the second circular arc (6). The trigger mechanism for the travel switch has the advantages of simple structure, long service life and reliable operation, and avoids the condition that the contact is not contacted in place or is damaged when the contact of the travel switch is triggered.

Inventors

  • WU JIANCHUN
  • XU HEHUA
  • LI GEN

Assignees

  • 江苏云峰科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250508

Claims (6)

  1. 1. A trigger mechanism for a travel switch comprises an operation shaft (1), a trigger pressing block (2) arranged on the operation shaft (1) and a travel switch (3) matched with the trigger pressing block (2) to monitor rotation of the operation shaft (1), and is characterized in that the outer contour of the trigger pressing block (2) is of a symmetrical curved surface structure and comprises a first circular arc (4), involute (5) and a second circular arc (6) which are sequentially and symmetrically connected to two ends of the first circular arc (4), and the distance between any outer contour point of the trigger pressing block (2) and the rotation axis of the trigger pressing block (2) is not larger than the radius of the first circular arc (4) and not smaller than the radius of the second circular arc (6).
  2. 2. The trigger mechanism for a travel switch according to claim 1, wherein the involute (5) includes a first involute (51) and a second involute (52) connected end to end, and wherein the first involute (51) is connected to the first arc (4) and the second involute (52) is connected to the second arc (6).
  3. 3. The trigger mechanism for a travel switch according to claim 2, wherein the curvature of the first involute (51) is smaller than the curvature of the second involute (52).
  4. 4. The trigger mechanism for a travel switch according to claim 1, wherein the outer contour between the two second circular arcs (6) of the trigger block (2) includes a straight line (7) and a chamfer (8).
  5. 5. The trigger mechanism for the travel switch of claim 1, wherein a hollowed-out structure is arranged between the outer contour of the trigger pressing block (2) and the inner central hole, so that materials are saved.
  6. 6. The trigger mechanism for the travel switch of claim 1, wherein a limiting block (21) is arranged on the inner wall of a central hole of the trigger pressing block (2) and is matched with a limiting groove on the operation shaft (1) to enable the trigger pressing block (2) to rotate along with the operation shaft (1).

Description

Trigger mechanism for travel switch Technical Field The utility model relates to a trigger mechanism for a travel switch, and belongs to the technical field of power equipment. Background In power transmission and distribution products, some switch devices (such as a high-voltage circuit breaker, a high-voltage load switch, a high-voltage isolating switch, a grounding switch and the like) are required to be provided with a travel switch, and contacts of the travel switch are closed or opened under the drive of a swing arm pressing block of an operating shaft of the switch device, so that monitoring or feedback signals are provided for the outside or the remote of the switch device, and the switch device is in a working state of closing or opening. On the switch devices, the contact of the driving travel switch is a pressing block of a swing arm structure, the pressing block rotates under the drive of an operation shaft on the switch, and the contact of the travel switch is pressed to act during rotation, so that the pressing block rotates backwards, namely, the contact of the travel switch is reset after leaving the travel switch. Because the output angle of the shaft can be changed beyond the range in the actual rotation process of the operation shaft, the swing arm cannot rotate in place or rotates in place, the contact of the corresponding travel switch cannot act or directly crush the travel switch, and the operation reliability of the equipment is reduced. Therefore, there is a need for a trigger mechanism for a travel switch that has a simple structure, a long service life, and reliable operation. Disclosure of Invention The utility model aims to overcome the defects and provide the trigger mechanism for the travel switch, which has simple structure, long service life and reliable operation and can avoid the condition that the contact is not contacted in place or is crushed when the contact of the travel switch is triggered. The purpose of the utility model is realized in the following way: The trigger mechanism for the travel switch comprises an operation shaft, a trigger pressing block arranged on the operation shaft and a travel switch matched with the trigger pressing block to realize the monitoring of the rotation of the operation shaft, wherein the outer contour of the trigger pressing block is of a symmetrical curved surface structure and comprises a first circular arc, an involute and a second circular arc which are sequentially and symmetrically connected to two ends of the first circular arc, and the distance between any outer contour point of the trigger pressing block and the rotation axis of the trigger pressing block is not larger than the radius of the first circular arc and not smaller than the radius of the second circular arc. Further, the involute comprises a first involute and a second involute which are connected end to end, wherein the first involute is connected with the first circular arc, and the second involute is connected with the second circular arc. Further, the curvature of the first involute is smaller than the curvature of the second involute. Further, the outer contour between the two second circular arcs of the trigger block comprises a straight line and a chamfer. Furthermore, a hollow structure is arranged between the outer contour of the trigger pressing block and the inner central hole, so that materials are saved. Further, a limiting block is arranged on the inner wall of the central hole of the trigger pressing block and is matched with a limiting groove on the operation shaft, so that the trigger pressing block rotates along with the operation shaft. Compared with the prior art, the utility model has the beneficial effects that: According to the utility model, the outer contour of the trigger pressing block is of a symmetrical arc and involute structure, when the trigger pressing block rotates along with the operation shaft, the contact of the travel switch can be reliably pressed in by the maximum outer diameter formed by the outer contour, and the contact of the travel switch can be reliably separated by the minimum outer diameter, so that the problem that the contact of the corresponding travel switch cannot act or directly crush the travel switch under the condition that the operation shaft is not rotated in place or is rotated out of place is avoided, and the operation reliability of equipment is improved. Drawings Fig. 1 is a schematic structural view of a trigger mechanism for a travel switch according to the present utility model. Fig. 2 is a schematic view of the radius range of the outer outline of a trigger pressing block of the trigger mechanism for the travel switch. Wherein: The device comprises an operation shaft 1, a trigger pressing block 2, a travel switch 3, a first circular arc 4, an involute 5, a second circular arc 6, a straight line 7 and a chamfer 8; The limiting block 21, the first involute 51 and the second involute 52. Detailed Descr