CN214588660U - Locking structure for circuit breaker - Google Patents
Locking structure for circuit breaker Download PDFInfo
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- CN214588660U CN214588660U CN202120426082.1U CN202120426082U CN214588660U CN 214588660 U CN214588660 U CN 214588660U CN 202120426082 U CN202120426082 U CN 202120426082U CN 214588660 U CN214588660 U CN 214588660U
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Abstract
The utility model belongs to the technical field of circuit breakers, and discloses a locking structure for a circuit breaker, which comprises a locking pin and a locking piece, wherein the circuit breaker comprises a bracket and a connecting plate, the bracket is provided with a mounting hole, the mounting hole comprises a screw hole section, a straight hole section and a transition section, a step surface is arranged at the joint of the straight hole section and the screw hole section, and a step surface is arranged at the joint of the straight hole section and the transition section; the connecting plate is provided with a pin hole; the screw hole section, the straight hole section, the transition section and the pin hole are communicated in sequence; the diameter of the head end of the locking pin is smaller than that of the tail end of the locking pin, the head end of the locking pin is arranged in the pin hole, and the tail end of the locking pin is arranged in the straight hole section; internal threads are arranged on the inner walls of the straight hole section and the screw hole section, and the rotating directions of the two threads are opposite; the retaining member is mounted in the threaded bore section. The locking structure of the utility model can effectively lock the pin body, prevent the pin body from loosening, ensure the reliable operation of the transmission system of the circuit breaker and have long service life; two sections of threads with opposite rotation directions are integrally designed in a small space, the locking nut is hidden, and the space utilization rate is high.
Description
Technical Field
The utility model belongs to the technical field of the circuit breaker, a locking structure for circuit breaker is related to.
Background
The pin is a key core component of mechanical equipment, and moving parts of the mechanical equipment are connected by the pin, so that force or torque is transmitted, movement transmission is realized, and an expected movement effect is achieved. The fulcrum positioning pin is usually fixed on the bracket, does not move along with the transmission part, plays a role in supporting, positioning, limiting or guiding the transmission part, and is particularly widely applied to high-voltage circuit breakers.
The high-voltage circuit breaker working in the power system has high opening and closing movement speed for opening and closing fault current, so that the movement speed of parts of a transmission part is high, the generated vibration and impact force are large, the pin of a transmission part of the equipment is greatly impacted by the vibration in the using process, the borne load is alternating load, and the stress condition is severe. In order to limit the axial deviation of the pin body, the conventional fulcrum positioning pin of the current circuit breaker is mostly fixed by additionally installing a check ring or threads without a locking function, so that the conventional fulcrum positioning pin is subjected to impact load and vibration in use, the problem that the pin body is separated or sheared easily occurs, then transmission parts are separated, finally, the circuit breaker is seriously broken, the use reliability is low, and the service life is short.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects existing in the prior art, the utility model aims to provide a locking structure for circuit breaker solves the problem that the prior art pin body easily breaks away from or is cut.
The utility model discloses a realize through following technical scheme:
a locking structure for a circuit breaker comprises a bracket and a connecting plate, wherein the locking structure comprises a locking pin and a locking piece, and the bracket is connected with the connecting plate through the locking pin;
the bracket is provided with a mounting hole, the mounting hole comprises a screw hole section, a straight hole section and a transition section, a step surface is arranged at the joint of the straight hole section and the screw hole section, and a step surface is arranged at the joint of the straight hole section and the transition section; the connecting plate is provided with a pin hole; the screw hole section, the straight hole section, the transition section and the pin hole are communicated in sequence;
the locking pin comprises a head end and a tail end, the diameter of the head end is smaller than that of the tail end, the head end is installed in the pin hole, and the tail end is installed in the straight hole section;
internal threads are arranged on the inner walls of the straight hole section and the screw hole section, and the rotating directions of the two threads are opposite;
the retaining member is installed in the screw hole section, and the retaining member outer wall is equipped with the external screw thread, and the tail end of fitting pin is equipped with the external screw thread.
Furthermore, the transition section is a taper hole or a cylindrical hole.
Further, when the transition section is a taper hole, the diameter of one end of the taper hole connected with the straight hole section is larger than that of one end communicated with the pin hole.
Furthermore, an installation head is prefabricated at the head end of the locking pin, or a fabrication hole is prefabricated at the tail end of the locking pin.
Furthermore, the mounting head adopts a hexagonal head, and the process hole adopts an inner hexagonal hole or a square hole.
Furthermore, a shaft sleeve is arranged at the head end of the locking pin.
Furthermore, a connecting hole is prefabricated in the center of the locking piece.
Furthermore, the connecting holes are inner hexagonal holes or square holes.
Furthermore, the locking piece adopts a locking nut.
Furthermore, the screw thread at the tail end of the locking pin is a left-hand screw thread, and the screw thread of the locking piece is a right-hand screw thread.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a locking structure for a circuit breaker, which comprises a locking pin and a locking nut, wherein a mounting hole is formed on a bracket and comprises a screw hole section, a straight hole section and a transition section, the straight hole section and the screw hole section have step surfaces, the joint of the straight hole section and the transition section has step surfaces, one end of the locking pin is arranged in a pin hole of a connecting plate, and the other end of the locking pin is arranged in the straight hole section of the mounting hole; when the locking pin moves in the axial direction due to vibration or impact, the locking piece can tightly lock the pin tail due to the fact that the screwing directions of the two threads of the straight hole section are opposite to that of the two threads of the threaded hole section, the step surface is arranged on the other side of the locking piece, the degree of freedom in the other direction is limited, and the purpose of preventing looseness is achieved. When the transmission part is guided, limited or positioned by the pin, the pin can bear various impact loads and vibration by virtue of the locking structure, the position of the locking pin is unchanged, and the functions of accurate guiding, limiting and positioning are achieved, so that the reliable operation of the transmission system of the circuit breaker is ensured. The locking structure of the utility model can effectively lock the pin body, and is subjected to the impact of the opening and closing motion of the circuit breaker to prevent the pin body from loosening, thereby ensuring the precision of the motion position, ensuring the reliable operation of the transmission system of the circuit breaker and having long service life; the locking pin has simple structure and small size, can adapt to the arrangement of a plurality of arc extinguish chambers in narrow space, is beneficial to the miniaturization design of the circuit breaker and reduces the manufacturing cost; the locking structure utilizes the support to integrally design two sections of threads with opposite rotating directions in a small space, the locking nut is hidden, and the space utilization rate is high.
Furthermore, an installation head is prefabricated at the head end of the locking pin, or a process hole is prefabricated at the tail end of the locking pin, so that the locking pin can be conveniently clamped by a tool and screwed down.
Further, install the axle sleeve in the pinhole, the axle sleeve plays wear-resisting effect, rotates or gliding in-process around the fitting pin at even board, reduces the part wearing and tearing, improves even board and fitting pin's life.
Drawings
Fig. 1 is a schematic diagram of a locking structure for a circuit breaker according to the present invention;
fig. 2 is a schematic structural view of the locking pin of the present invention;
fig. 3 is a schematic view of a connection structure of a bracket and a link plate of the circuit breaker.
Wherein: the support is 1, the connecting plate is 2, the locking pin is 3, the locking part is 4, the shaft sleeve is 5, the mounting hole is 6, the mounting head is 7, and the connecting hole is 8.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in fig. 1 to 3, the utility model discloses a locking structure for a circuit breaker, the circuit breaker comprises a bracket 1 and a connecting plate 2, the locking structure comprises a locking pin 3 and a locking piece 4, the bracket 1 and the connecting plate 2 are connected through the locking pin 3; a mounting hole 6 is formed in the bracket 1, the mounting hole 6 comprises a screw hole section, a straight hole section and a transition section, a step surface is arranged at the joint of the straight hole section and the screw hole section, and a step surface is arranged at the joint of the straight hole section and the transition section; the connecting plate 2 is provided with a pin hole; the screw hole section, the straight hole section, the transition section and the pin hole are communicated in sequence; the locking pin 3 comprises a head end and a tail end, the diameter of the head end is smaller than that of the tail end, the head end is arranged in the pin hole, and the tail end is arranged in the straight hole section; internal threads are arranged on the inner walls of the straight hole section and the screw hole section, and the rotating directions of the two threads are opposite; retaining member 4 is installed in the screw hole section, and 4 outer walls of retaining member are equipped with the external screw thread, and the tail end of fitting pin 3 is equipped with the external screw thread.
The transition section is designed as a taper hole or a cylindrical hole. When the transition section is a taper hole, the diameter of one end of the taper hole connected with the straight hole section is larger than that of one end communicated with the pin hole.
As shown in fig. 2, an installation head 7 is prefabricated at the head end of the locking pin 3, and the installation head 7 is a hexagonal head, so that a tool can conveniently clamp the installation head 7 to tighten the locking pin 3. Or a process hole is prefabricated at the tail end of the locking pin 3, and the process hole adopts an inner hexagonal hole or a square hole, so that the locking pin 3 is conveniently screwed down.
More preferably, install axle sleeve 5 in the pinhole, the head end of fitting pin 3 runs through in axle sleeve 5, and axle sleeve 5 plays wear-resisting effect, improves wear-resisting life. The rotating plate is arranged outside the shaft sleeve 5 and can rotate, slide and the like to transmit motion.
Preferably, the center of the locking nut is provided with a connecting hole 8 as a fabrication hole, and the connecting hole 8 adopts a hexagonal hole or a square hole, so that a connecting tool is convenient to screw the locking piece 4. The locking piece 4 adopts a locking nut.
The pin tail of the locking pin 3 is a thread locking part, the thread of the pin tail can be a left-hand thread, and the locking nut is a right-hand thread.
As shown in fig. 1, when the locking pin 3 is installed, the locking pin 3 is screwed into the installation hole 6 from the left side of the bracket 1, the tail end of the locking pin 3 abuts against the step end face of the transition hole, and then the locking nut is screwed in from the left side and abuts against the end part of the locking pin 3; when the locking pin 3 withdraws backwards due to vibration or impact, the locking nut can tightly prop against the tail end of the locking pin 3 due to the opposite thread direction of the screw hole section and the straight hole section, the locking pin 3 is locked, so that the locking pin cannot be separated, the transition hole step is arranged on the other side, the degree of freedom in the other direction is limited, and the purpose of preventing looseness is achieved. As shown in fig. 3, when the connecting plate 2 is guided, limited or positioned by the pin body, the pin body can bear various impact loads and vibration by virtue of the locking structure, the position of the fixing pin is unchanged, and the functions of accurate guiding, limiting and positioning are achieved, so that the reliable operation of the transmission system of the circuit breaker is ensured.
Claims (10)
1. The locking structure for the circuit breaker is characterized by comprising a bracket (1) and a connecting plate (2), wherein the locking structure comprises a locking pin (3) and a locking piece (4), and the bracket (1) is connected with the connecting plate (2) through the locking pin (3);
a mounting hole (6) is formed in the support (1), the mounting hole (6) comprises a screw hole section, a straight hole section and a transition section, a step surface is arranged at the joint of the straight hole section and the screw hole section, and a step surface is arranged at the joint of the straight hole section and the transition section; the connecting plate (2) is provided with a pin hole; the screw hole section, the straight hole section, the transition section and the pin hole are communicated in sequence;
the locking pin (3) comprises a head end and a tail end, the diameter of the head end is smaller than that of the tail end, the head end is arranged in the pin hole, and the tail end is arranged in the straight hole section;
internal threads are arranged on the inner walls of the straight hole section and the screw hole section, and the rotating directions of the two threads are opposite;
locking member (4) are installed in the screw hole section, and locking member (4) outer wall is equipped with the external screw thread, and the tail end of fitting pin (3) is equipped with the external screw thread.
2. The locking structure of claim 1, wherein the transition section is a tapered hole or a cylindrical hole.
3. The locking structure of claim 2, wherein when the transition section is a tapered hole, a diameter of a connection end of the tapered hole and the straight hole section is larger than a diameter of a connection end of the tapered hole and the straight hole section.
4. The locking structure for circuit breaker according to claim 1, wherein the mounting head (7) is preformed at the head end of the locking pin (3) or the tooling hole is preformed at the tail end of the locking pin (3).
5. The circuit breaker locking structure of claim 4, wherein the mounting head (7) is a hexagonal head, and the process hole is a hexagonal socket or a square hole.
6. The locking structure for a circuit breaker according to claim 1, wherein a bushing (5) is installed at a head end of the locking pin (3).
7. The locking structure for the circuit breaker according to claim 1, wherein the locking member (4) is pre-formed with a coupling hole (8) at the center.
8. The locking structure for circuit breaker according to claim 7, wherein the connecting hole (8) is a hexagonal socket or a square socket.
9. The locking structure for circuit breaker according to claim 1, wherein the locking member (4) is a lock nut.
10. The locking structure for circuit breaker according to claim 1, wherein the thread of the tail end of the locking pin (3) is a left-handed thread and the thread of the locking member (4) is a right-handed thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120426082.1U CN214588660U (en) | 2021-02-26 | 2021-02-26 | Locking structure for circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120426082.1U CN214588660U (en) | 2021-02-26 | 2021-02-26 | Locking structure for circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214588660U true CN214588660U (en) | 2021-11-02 |
Family
ID=78351730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120426082.1U Active CN214588660U (en) | 2021-02-26 | 2021-02-26 | Locking structure for circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214588660U (en) |
-
2021
- 2021-02-26 CN CN202120426082.1U patent/CN214588660U/en active Active
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