Power circuit breaker

Abstract

The utility model discloses a power circuit breaker, which comprises a control base, an electric angle iron, a thermal expansion pin, a piezoelectric block, a lock pin and a lock rod assembly, two sides of the control base are provided with an access electrode and an output electrode, the electric angle iron is fixedly arranged on the inner side of the control base, and the surface of the control base is fixedly provided with a fixed seat. The piezoelectric block and the lock pin are rotationally installed on the surface of the fixing base, the bottom end of the thermal expansion pin abuts against the surface of the output electrode, and the lock rod assembly comprises a column rod, a first connecting rod, a second connecting rod and a blocking piece rotationally installed on the surface of the fixing base. According to the utility model, through the arrangement of the novel thermal expansion type kick circuit break structure, the thermal expansion pin is expanded at a high temperature through current when a circuit is overloaded, the lock pin is linked to deflect, and the lock rod assembly is released to link the piezoelectric block to cut off the circuit, so that automatic circuit break control is realized, the circuit break structure can be repeatedly used, and the safety is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a power circuit breaker. Background Art

[0002] Power circuit breakers are important devices used in electrical systems to protect circuits from faults such as overloads and short circuits. They have a variety of different structures and working principles to meet the needs of different occasions and requirements. The following are some common power circuit breaker structures and defects: Fuse-type power circuit breakers are usually composed of conductors and fuses. When the current exceeds the rated value, the fuse melts and cuts off the circuit. Once the fuse melts, it needs to be replaced. And before it melts, the fuse may become hot due to overload, which may cause a fire risk.

[0003] In view of this, research and improvement are conducted on the existing problems, and a power circuit breaker is provided to solve the current problems, aiming to achieve the purpose of solving the problems and improving the practical value through this technology. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted by the utility model is: a power circuit breaker, comprising: a control base, an electric angle iron, a thermal expansion pin, a piezoelectric block, a locking pin and a locking rod assembly, wherein access electrodes and output electrodes are provided on both sides of the control base, the electric angle iron is fixedly installed on the inner side of the control base, a fixing seat is fixedly installed on the surface of the control base, the piezoelectric block and the locking pin are rotatably installed on the surface of the fixing seat, the bottom end of the thermal expansion pin abuts the surface of the output electrode, the locking rod assembly comprises a column rod, a first connecting rod and a second connecting rod, and a baffle rotatably installed on the surface of the fixing seat, the bottom end of the baffle contacts the surface of the locking pin, an unlocking groove is provided on the surface of the locking pin, a swivel pin is provided at the ends of the column rod and the first connecting rod and is rotatably connected, the swivel pin is slidably sleeved on the surface of the column rod, an electrical connection protrusion is provided on the surface of the piezoelectric block, and the electrical connection protrusion is arranged relative to the electric angle iron and abuts against each other.

[0006] In a preferred example, the utility model can be further configured as follows: the thermal expansion pin is a thermal expansion metal material component, and the surface of the locking pin is provided with an eccentric connecting rod which is fixedly connected to the top end of the thermal expansion pin.

[0007] In a preferred example, the utility model can be further configured as follows: the electric angle iron is a V-shaped metal spring structure, and the electrical connection protrusion, the electric angle iron and the access electrode are located in the same vertical plane.

[0008] In a preferred example, the utility model can be further configured as follows: a sliding pin is provided on the surface of the baffle and is slidably sleeved on the inner side of the unlocking pressure rod, the baffle is rotatably connected to the surface of the second connecting rod, and the bottom end of the baffle is located in the same horizontal plane as the axis of the locking pin.

[0009] In a preferred example, the present invention can be further configured as follows: the unlocking groove is a U-shaped groove structure and the bottom end and the axis of the locking pin are located in the same horizontal plane.

[0010] In a preferred example, the present invention can be further configured as follows: the bottom end of the unlocking pressure rod is in an inclined structure, and the bottom end of the unlocking pressure rod abuts against the surface of the unlocking groove.

[0011] In a preferred example, the utility model can be further configured as follows: the surface of the piezoelectric block is provided with a tension spring connected to the surface of the fixing seat, and the surface of the column rod is movably sleeved with a spring located below the connection point between the first connecting rod and the second connecting rod.

[0012] The beneficial effects achieved by the utility model are:

[0013] 1. In the utility model, a new thermal expansion type sudden jump circuit breaker structure is provided. When the circuit is overloaded, the current passes through the thermal expansion pin to expand at high temperature, and the linkage lock pin deflects and moves and releases the lock rod assembly to link the piezoelectric block to cut off the circuit, thereby realizing automatic circuit breaker control, and the utility model can be reused, which significantly improves safety.

[0014] 2. In the utility model, the deflection movement of the lock pin is controlled by the unlocking pressure rod, and the locking rod assembly is released in linkage, so that the deflection movement of the piezoelectric block is realized and the circuit is cut off. One-touch manual circuit breaker control can be performed, and the structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of an insulation barrier cover according to an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the electrical connection structure of an embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the installation structure of a lock rod assembly according to an embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of a piezoelectric block according to an embodiment of the utility model;

[0020] Figure 6 The figure is a schematic diagram of the thermal expansion pin and the locking pin structure of one embodiment of the utility model.

[0021] Reference numerals:

[0022] 1. Control base; 2. Electric angle iron; 3. Thermal expansion pin; 4. Piezoelectric block; 5. Unlocking lever; 6. Lock pin; 7. Lock lever assembly;

[0023] 11. Insulating resistance cover; 12. Access electrode; 13. Fixed seat; 14. Output electrode; 41. Electrical connection cam; 61. Unlocking slot; 71. Post; 72. First connecting rod; 73. Second connecting rod; 74. Blocking piece. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0025] A power circuit breaker provided by some embodiments of the utility model is described below in conjunction with the accompanying drawings.

[0026] Combination Figure 1-6 As shown, a power circuit breaker provided by the utility model comprises: a control base 1, an electric angle iron 2, a thermal expansion pin 3, a piezoelectric block 4, a locking pin 6 and a locking rod assembly 7, access electrodes 12 and output electrodes 14 are provided on both sides of the control base 1, the electric angle iron 2 is fixedly installed on the inner side of the control base 1, a fixing seat 13 is fixedly installed on the surface of the control base 1, the piezoelectric block 4 and the locking pin 6 are rotatably installed on the surface of the fixing seat 13, the bottom end of the thermal expansion pin 3 abuts against the surface of the output electrode 14, the locking rod assembly 7 comprises a column 71, a first connecting rod 72 and a second connecting rod 73 and a baffle 74 rotatably installed on the surface of the fixing seat 13, the bottom end of the baffle 74 contacts the surface of the locking pin 6, an unlocking groove 61 is provided on the surface of the locking pin 6, a rotating pin is provided at the ends of the column 71 and the first connecting rod 72 and is rotatably connected, the rotating pin is slidably sleeved on the surface of the column 71, an electric connection protrusion 41 is provided on the surface of the piezoelectric block 4, and the electric connection protrusion 41 is arranged relative to the electric angle iron 2 and abuts against each other.

[0027] In this embodiment, the thermal expansion pin 3 is a thermal expansion metal material component, and an eccentric connecting rod is provided on the surface of the locking pin 6 and is fixedly connected to the top end of the thermal expansion pin 3 .

[0028] Specifically, when the circuit is overloaded, the current passes through the thermal expansion pin 3 to expand at high temperature, and the linkage lock pin 6 deflects and moves and releases the lock rod assembly 7 to link the piezoelectric block 4 to cut off the circuit, thereby realizing automatic circuit breaking control.

[0029] In this embodiment, the electric angle iron 2 is a V-shaped metal spring structure, and the electrical connection protrusion 41, the electric angle iron 2 and the access electrode 12 are located in the same vertical plane.

[0030] In this embodiment, a sliding pin is provided on the surface of the baffle 74 and is slidably sleeved on the inner side of the unlocking pressure rod 5. The baffle 74 and the surface of the second connecting rod 73 are rotationally connected, and the bottom end of the baffle 74 and the axis of the locking pin 6 are located in the same horizontal plane.

[0031] In this embodiment, the unlocking groove 61 is a U-shaped groove structure and the bottom end is located in the same horizontal plane as the axis of the locking pin 6 .

[0032] Specifically, after the lock pin 6 deflects, the end of the blocking piece 74 is disengaged from the abutment with the surface of the lock pin 6 to unlock the lock.

[0033] In this embodiment, the bottom end of the unlocking lever 5 is an inclined structure, and the bottom end of the unlocking lever 5 abuts against the surface of the unlocking groove 61 .

[0034] Specifically, under the downward pressure of the unlocking pressure rod 5, it contacts the surface of the unlocking groove 61, realizing the deflection movement of the lock pin 6, and performing manual unlocking.

[0035] In this embodiment, a tension spring connected to the surface of the fixing seat 13 is provided on the surface of the piezoelectric block 4 , and a spring located below the connection point between the first connecting rod 72 and the second connecting rod 73 is movably sleeved on the surface of the column 71 .

[0036] Specifically, the piezoelectric block 4 and the column rod 71 are automatically reset under the traction of the spring.

[0037] The working principle and use process of this utility model:

[0038] When using the power circuit breaker, the two ends of the electrode are connected to the surfaces of the access electrode 12 and the output electrode 14 respectively, and the column rod 71 is manually pressed to make the column rod 71 link the connection point of the first connecting rod 72 and the second connecting rod 73 to move downward, and the bottom end of the baffle 74 abuts against the surface of the lock pin 6 when the column rod 71 and the first connecting rod 72 are combined to form a straight line, and the piezoelectric block 4 deflects and contacts the electric convex 41 and presses the surface of the electric angle iron 2 to contact the end of the access electrode 12, so as to make an electrical connection, and the state of the lock rod assembly 7 is locked, which is a passage state;

[0039] When the circuit is overloaded and the thermal expansion pin 3 expands, or when the unlocking pressure rod 5 is manually pressed, the locking pin 6 deflects and the end of the baffle 74 disengages from the surface of the locking pin 6. Under the linkage of the spring on the surface of the column 71 and the spring on the surface of the piezoelectric block 4, the column 71 moves upward, linking the connection point of the first connecting rod 72 and the second connecting rod 73 to move upward. The first connecting rod 72 links the piezoelectric block 4 to deflect and unlock the pressure on the electric angle iron 2, thereby cutting off the circuit between the electric angle iron 2 and the surface of the access electrode 12.

[0040] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power circuit breaker, characterized in that: include: A control base (1), an electric angle iron (2), a thermal expansion pin (3), a piezoelectric block (4), a locking pin (6) and a locking rod assembly (7); the control base (1) is provided with an input electrode (12) and an output electrode (14) on both sides; the electric angle iron (2) is fixedly mounted on the inner side of the control base (1); a fixing seat (13) is fixedly mounted on the surface of the control base (1); the piezoelectric block (4) and the locking pin (6) are rotatably mounted on the surface of the fixing seat (13); the bottom end of the thermal expansion pin (3) abuts against the surface of the output electrode (14); the locking rod assembly (7) ) comprises a column (71), a first connecting rod (72), a second connecting rod (73) and a baffle (74) rotatably mounted on the surface of a fixed seat (13), the bottom end of the baffle (74) contacts the surface of a locking pin (6), the surface of the locking pin (6) is provided with an unlocking groove (61), the ends of the column (71) and the first connecting rod (72) are provided with a rotating pin and are rotatably connected, the rotating pin is slidably sleeved on the surface of the column (71), the surface of the piezoelectric block (4) is provided with an electrical connection protrusion (41), the electrical connection protrusion (41) and the electric angle iron (2) are arranged opposite to each other and abut against each other.

2. A power circuit breaker according to claim 1, characterized in that: The thermal expansion pin (3) is a thermal expansion metal material component, and the surface of the locking pin (6) is provided with an eccentric connecting rod which is fixedly connected to the top end of the thermal expansion pin (3).

3. A power circuit breaker according to claim 1, characterized in that: The electric angle iron (2) is a V-shaped metal spring structure, and the electrical connection protrusion (41), the electric angle iron (2) and the access electrode (12) are located in the same vertical plane.

4. A power circuit breaker according to claim 1, characterized in that: The surface of the blocking piece (74) is provided with a sliding pin and is slidably sleeved on the inner side of the unlocking pressure rod (5). The blocking piece (74) is rotatably connected to the surface of the second connecting rod (73). The bottom end of the blocking piece (74) and the axis of the locking pin (6) are located in the same horizontal plane.

5. A power circuit breaker according to claim 1, characterized in that: The unlocking groove (61) is a U-shaped groove structure, and the bottom end and the axis of the locking pin (6) are located in the same horizontal plane.

6. A power circuit breaker according to claim 4, characterized in that: The bottom end of the unlocking pressure rod (5) is in an inclined structure, and the bottom end of the unlocking pressure rod (5) abuts against the surface of the unlocking groove (61).

7. A power circuit breaker according to claim 1, characterized in that: The surface of the piezoelectric block (4) is provided with a tension spring connected to the surface of the fixing seat (13), and the surface of the column rod (71) is movably sleeved with a spring located below the connection point between the first connecting rod (72) and the second connecting rod (73).

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