Circuit breaker transmission device and circuit breaker equipment

Abstract

The invention provides a circuit breaker transmission device and circuit breaker equipment, and belongs to the field of circuit breakers. The circuit breaker transmission device comprises a mounting shell, a rotating shaft, a crank and rockers, the crank and the rockers are arranged in groups, the rotating shaft is mounted on the mounting shell, each rocker comprises a driving part and a driven part, the crank comprises a connecting part connected to the rockers in the same group and a rotating part connected with the rotating shaft, and the connecting part, the driven part and the driving part are located on the same straight line. And the distance from the connecting part to the rotating part in the same group is equal to the distance from the connecting part to the driving part and is also equal to the distance from the connecting part to the driven part. The circuit breaker equipment comprises the transmission device. The acting force applied to the movable end of the arc extinguishing assembly by the transmission device is always in the same direction as the moving direction of the movable end of the arc extinguishing assembly, so that the movable end of the arc extinguishing assembly is prevented from being impacted in the radial direction, and the movable end of the arc extinguishing assembly can stably work for a long time.

Description

Technical Field

[0001] The invention belongs to the field of circuit breakers, and in particular relates to a circuit breaker transmission device and a circuit breaker equipment. Background Art

[0002] The transmission device in the circuit breaker is used to transfer power between the moving end of the arc extinguishing assembly and the insulating rod, so as to smoothly open and close the circuit breaker. In some circuit breakers with a double-break structure, it is necessary to use an insulating rod to simultaneously drive the moving ends of the two arc extinguishing assemblies to move, so as to achieve synchronous opening and closing of the two arc extinguishing assemblies.

[0003] The transmission device in such a circuit breaker generally includes two crank arms, both of which are equipped with a rotating shaft that allows them to rotate independently, and both ends of the crank arms are connected to connecting rods, wherein the connecting rod at the upper end of the crank arm is used to connect with the moving end of the arc extinguishing assembly, and the connecting rod at the lower end of the crank arm is used to connect with the driving rod. The driving rod can move vertically under the drive of the driving assembly and the guidance of the guide structure in the circuit breaker housing. The vertical linear movement of the driving rod can drive the crank arm to rotate, and then drive the moving end of the arc extinguishing assembly to move horizontally. For example, the triple transmission device disclosed in the Chinese invention patent with the authorization announcement number CN115331989B.

[0004] However, this transmission device has the following disadvantages. First, the connecting rod used to connect the crank arm and the moving end of the arc extinguishing assembly always exerts a force on the moving end of the arc extinguishing assembly in the direction of its length, and the connecting rod is often in a non-horizontal state. Therefore, the connecting rod exerts a force component on the moving end of the arc extinguishing assembly that is perpendicular to the moving direction of the moving end of the arc extinguishing assembly, which will cause the moving end of the arc extinguishing assembly to be subjected to radial impact during the opening and closing process. In particular, when the speed of opening and closing increases, the radial impact on the moving end of the arc extinguishing assembly will also increase. In severe cases, the moving end of the arc extinguishing assembly will be deformed and unable to work normally. This problem will be encountered in circuit breakers that require vertical transmission.

[0005] Secondly, in order to avoid collision between the two crank arms, the two crank arms are staggered in the direction of their rotation axis, which results in the two crank arms not being able to be located in the middle position of the corresponding rotation axis. The rotation axis is subjected to unbalanced force, which causes one end of the rotation axis to be subjected to increased force, affecting the life of the bearing at that end, thereby reducing the service life of the entire circuit breaker.

[0006] Finally, since each crank arm needs to be equipped with a rotating shaft, a bearing seat for mounting the rotating shaft needs to be reserved on the corresponding housing of the circuit breaker, resulting in a relatively complex overall structure. In addition, each crank arm needs to be equipped with two connecting rods, resulting in a large overall size of the transmission device, which does not meet the compactness and miniaturization requirements of the circuit breaker development. Summary of the invention

[0007] One of the purposes of the present invention is to provide a circuit breaker transmission device to solve the technical problem in the prior art that the force exerted by the transmission device on the movable end of the arc extinguishing assembly has a radial component, making the movable end of the arc extinguishing assembly susceptible to radial impact and deformation.

[0008] Another object of the present invention is to provide a circuit breaker device to solve the above technical problems.

[0009] To achieve the above object, the technical solution of the circuit breaker transmission device provided by the present invention is: A circuit breaker transmission device comprises a mounting shell, a rotating shaft, and a crank and a rocker arranged in a group. The rotating shaft is mounted on the mounting shell. The rocker comprises an active part for connecting to a driving rod and a driven part for connecting to a moving end of an arc extinguishing assembly. The crank comprises a connecting part connected between the driven part and the active part of the rocker in the same group and a rotating part connected to the rotating shaft. The connecting part, the driven part and the active part are located on the same straight line. The distance from the connecting part to the rotating part in the same group is equal to the distance from the connecting part to the active part and also equal to the distance from the connecting part to the driven part. When in use, the active part can move in a straight line driven by the driving rod, and the driven part moves in a direction perpendicular to the moving direction of the active part driven by the active part.

[0010] As a further improvement, two groups of cranks and rockers are provided, the active parts of the two rockers are used to connect to the same driving rod and can rotate coaxially, the driven parts of the two rockers are used to connect to the moving ends of two coaxial and oppositely arranged arc extinguishing assemblies, the rotating parts of the two cranks are connected to the rotating shaft and can rotate coaxially, and the connecting part of each crank is connected to the rocker of the same group.

[0011] As a further improvement, the two cranks are respectively a first crank and a second crank, the rotating part of the second crank is a forked structure, the rotating part of the first crank is located between the two forked parts of the rotating part of the second crank, and the rotating part of the first crank is located at the axial center position of the rotating shaft.

[0012] As a further improvement, the two rockers are respectively a first rocker and a second rocker, the active portion of the first rocker is a bifurcated structure, and the active portion of the second rocker is located between the two bifurcated portions of the active portion of the first rocker.

[0013] As a further improvement, the mounting shell includes a shell body and a boss arranged on the shell body, the boss is provided with a mounting hole for the rotating shaft or a bearing installed on the rotating shaft to be installed, and the boss is used to provide support for the end of the rotating shaft.

[0014] As a further improvement, the shell body is a three-way shell, which includes a first shell and a second shell. The first shell is provided with two coaxial interfaces, one end of the second shell is provided with two connecting parts and is connected to the first shell through the connecting parts, and the other end of the second shell is provided with an interface. The interface axis on the second shell is perpendicular to the interface axis on the first shell, and the two connecting parts of the second shell are arranged along the axial direction of the first shell, and the boss is located at the junction of the two connecting parts and the first shell.

[0015] As a further improvement, a reinforcing rib is provided between the outer peripheral wall surface of the boss and the outer wall surface of the shell body, and the reinforcing rib is perpendicular to the outer peripheral wall surface of the boss and the outer wall surface of the shell body.

[0016] As a further improvement, the axis of the rotating shaft is horizontal.

[0017] As a further improvement, the active part and the driven part are respectively the two ends of the rocker, and the connecting part and the rotating part are respectively the two ends of the crank.

[0018] Beneficial effects: The circuit breaker transmission device provided by the present invention is a pioneering invention. The active part on the rocker of the circuit breaker transmission device is directly connected to the driving rod, so that it can move along a straight line through the rotating axis under the drive of the driving rod. Under the constraint of the crank, the driven part of the rocker can only move in a direction perpendicular to the moving direction of the active part. After the driven part is connected to the moving end of the arc extinguishing component, the force applied by the driven part to the moving end of the arc extinguishing component is always in the same direction as the moving direction of the moving end of the arc extinguishing component, avoiding radial impact on the moving end of the arc extinguishing component, and ensuring that the moving end of the arc extinguishing component can work stably for a long time.

[0019] To achieve the above-mentioned purpose, the technical solution of the circuit breaker device provided by the present invention is: A circuit breaker device comprises an arc extinguishing assembly, a driving assembly, a driving rod connected to the output end of the driving assembly and capable of linear movement, and a transmission device for transmitting between the driving rod and the moving end of the arc extinguishing assembly, wherein the moving directions of the driving rod and the moving end of the arc extinguishing assembly are perpendicular, the transmission device comprises a mounting shell, a rotating shaft, and a crank and a rocker arranged in a group, the rotating shaft is mounted on the mounting shell, the rocker comprises an active part for connecting to the driving rod and a driven part for connecting to the moving end of the arc extinguishing assembly, the crank comprises a connecting part connected between the driven part and the active part of the same group of rockers and a rotating part connected to the rotating shaft, the connecting part and the driven part and the active part are located on the same straight line, the distance from the connecting part to the rotating part in the same group is equal to the distance from the connecting part to the active part and also equal to the distance from the connecting part to the driven part, when in use, the active part can move linearly driven by the driving rod, and the driven part moves in a direction perpendicular to the moving direction of the active part driven by the active part.

[0020] As a further improvement, two groups of cranks and rockers are provided, the active parts of the two rockers are used to connect to the same driving rod and can rotate coaxially, the driven parts of the two rockers are used to connect to the moving ends of two coaxial and oppositely arranged arc extinguishing assemblies, the rotating parts of the two cranks are connected to the rotating shaft and can rotate coaxially, and the connecting part of each crank is connected to the rocker of the same group.

[0021] As a further improvement, the two cranks are respectively a first crank and a second crank, the rotating part of the second crank is a forked structure, the rotating part of the first crank is located between the two forked parts of the rotating part of the second crank, and the rotating part of the first crank is located at the axial center position of the rotating shaft.

[0022] As a further improvement, the two rockers are respectively a first rocker and a second rocker, the active portion of the first rocker is a bifurcated structure, and the active portion of the second rocker is located between the two bifurcated portions of the active portion of the first rocker.

[0023] As a further improvement, the mounting shell includes a shell body and a boss arranged on the shell body, the boss is provided with a mounting hole for the rotating shaft or a bearing installed on the rotating shaft to be installed, and the boss is used to provide support for the end of the rotating shaft.

[0024] As a further improvement, the shell body is a three-way shell, which includes a first shell and a second shell. The first shell is provided with two coaxial interfaces, one end of the second shell is provided with two connecting parts and is connected to the first shell through the connecting parts, and the other end of the second shell is provided with an interface. The interface axis on the second shell is perpendicular to the interface axis on the first shell, and the two connecting parts of the second shell are arranged along the axial direction of the first shell, and the boss is located at the junction of the two connecting parts and the first shell.

[0025] As a further improvement, a reinforcing rib is provided between the outer peripheral wall surface of the boss and the outer wall surface of the shell body, and the reinforcing rib is perpendicular to the outer peripheral wall surface of the boss and the outer wall surface of the shell body.

[0026] As a further improvement, the axis of the rotating shaft is horizontal.

[0027] As a further improvement, the active part and the driven part are respectively the two ends of the rocker, and the connecting part and the rotating part are respectively the two ends of the crank.

[0028] Beneficial effects: The circuit breaker device provided by the present invention is an improvement over the prior art. The active part on the rocker of the transmission device in the circuit breaker device is directly connected to the driving rod, so that it can move along a straight line through the rotating shaft under the drive of the driving rod. Under the constraint of the crank, the driven part of the rocker can only move in a direction perpendicular to the moving direction of the active part. After the driven part is connected to the moving end of the arc extinguishing assembly, the force applied by the driven part to the moving end of the arc extinguishing assembly is always in the same direction as the moving direction of the moving end of the arc extinguishing assembly, thereby avoiding radial impact on the moving end of the arc extinguishing assembly and ensuring that the moving end of the arc extinguishing assembly can work stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the transmission device in Embodiment 1 of the circuit breaker device of the present invention; Figure 2 This is a structural schematic diagram of the transmission device in Embodiment 1 of the circuit breaker device of the present invention without the mounting shell; Figure 3 A cross-sectional view of a transmission device in Embodiment 1 of a circuit breaker device of the present invention; Figure 4 It is a structural schematic diagram of the transmission device in Embodiment 2 of the circuit breaker device of the present invention; Figure 5 It is a schematic diagram of the structure of the transmission device in Embodiment 3 of the circuit breaker device of the present invention.

[0030] Description of reference numerals: 1. Driving rod; 2. Moving end of arc extinguishing assembly; 3. Mounting shell; 31. First shell; 311. First interface; 312. Second interface; 32. Second shell; 321. Third interface; 322. First connecting part; 323. Second connecting part; 33. Boss; 34. Reinforcing rib; 4. Rotating shaft; 5. First crank; 51. First rotating part; 52. First connecting part; 6. Second crank; 61. Second rotating part; 62. Second connecting part; 7. First rocker; 71. First active part; 72. First driven part; 8. Second rocker; 81. Second active part; 82. Second driven part; 9. Bearing; 10. Articulated seat; 11. Third crank; 12. Third rocker; 13. Fourth crank; 14. Fourth rocker; 15. Fifth crank; 16. Fifth rocker; 17. Sixth crank; 18. Sixth rocker. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with embodiments.

[0032] To solve the problems in the prior art, the basic concept of the present invention is to apply a force in the same direction as the moving direction of the arc extinguishing component to the moving end of the arc extinguishing component at the output end of the transmission structure, thereby preventing the moving end of the arc extinguishing component from being deformed by impact.

[0033] Specific embodiment 1 of the circuit breaker device provided by the present invention: A circuit breaker device comprises an arc extinguishing assembly, a driving assembly, a driving rod 1 connected to an output end of the driving assembly and capable of linear movement, and a transmission device for transmitting between the driving rod 1 and a moving end 2 of the arc extinguishing assembly.

[0034] See attached Figure 1 and attached Figure 3 There are two arc extinguishing assemblies, and the moving ends 2 of the arc extinguishing assemblies are horizontally coaxial and relatively arranged. When the moving ends 2 of the arc extinguishing assemblies in the two arc extinguishing assemblies move toward each other, the arc extinguishing assemblies are opened, and when they move away from each other, the arc extinguishing assemblies are closed.

[0035] The drive assembly is arranged below the arc extinguishing assembly, and the output end of the drive assembly can drive the drive rod 1 to move up and down. Figure 2 and attached Figure 3 The axis of the driving rod 1 is in a vertical state, and a guide structure for vertically guiding the driving rod 1 is provided in the corresponding housing of the circuit breaker device. The driving assembly and the driving rod 1 are both prior art and will not be described in detail here.

[0036] See attached Figure 3 The transmission device includes a mounting shell 3, a rotating shaft 4, and a crank and a rocker arranged in groups.

[0037] The mounting shell 3 includes a shell body and a boss 33 arranged on the shell body. A mounting hole is provided at the center of the boss 33 for mounting a bearing 9 arranged at the end of the rotating shaft 4 .

[0038] The shell body is a three-way shell, and the shell body includes an integrally formed first shell 31 and a second shell 32. The first shell 31 is cylindrical and has two coaxial interfaces, namely a first interface 311 and a second interface 312. The first interface 311 and the second interface 312 are respectively connected to the shells of the two arc extinguishing assemblies; the upper end of the second shell 32 is integrally connected to the first shell 31, and the lower end of the second shell 32 is provided with a third interface 321, the axis of the third interface 321 is perpendicular to the axes of the first interface 311 and the second interface 312, and the third interface 321 faces downward and is connected to the shell where the driving rod 1 is set. Of course, in other embodiments, the second shell 32 can also be manufactured separately from the first shell 31 and connected together by welding.

[0039] The upper end of the second shell 32 is provided with two connection parts for connecting with the first shell 31, and the two connection parts are respectively the first connection part 322 and the second connection part 323. The first connection part 322 and the second connection part 323 are arranged along the axial direction of the first shell 31, and the boss 33 is located at the intersection of the first connection part 322, the second connection part 323 and the first shell 31. Stress concentration is prone to occur at the intersection of the first connection part 322, the second connection part 323 and the first shell 31. The boss 33 is arranged there, which strengthens the structural strength of the place, and there is no need to set up a reinforcing structure there, which can simplify the overall structure of the mounting shell 3. A reinforcing rib 34 is arranged between the outer peripheral wall surface of the boss 33 and the outer wall surface of the shell body, and the reinforcing rib 34 is perpendicular to the outer peripheral wall surface of the boss 33 and the outer wall surface of the shell body. The reinforcing rib 34 can be provided or not as needed.

[0040] The crank and the rocker are arranged in groups. In this embodiment, there are two groups of cranks and rockers, each group including a crank and a rocker. The two cranks are respectively a first crank 5 and a second crank 6, and the two rockers are respectively a first rocker 7 and a second rocker 8, wherein the first crank 5 and the first rocker 7 are in the same group, and the second crank 6 and the second rocker 8 are in the same group.

[0041] The rocker includes an active part for connecting to the driving rod 1 and a driven part for connecting to the corresponding arc extinguishing assembly moving end 2. In this embodiment, the active part and the driven part are respectively the two ends of the rocker. In other embodiments, the active part and the driven part may also be non-end parts.

[0042] The active parts of the first rocker arm 7 and the second rocker arm 8 are connected to the same hinge shaft, so that the active parts of the first rocker arm 7 and the second rocker arm 8 can rotate coaxially. Specifically, the active part of the first rocker arm 7 is the first active part 71, and the first active part 71 is a bifurcated structure. The active part of the second rocker arm 8 is the second active part 81, and the second active part 81 is located between the two bifurcated parts of the active part of the first rocker arm 7, and the second active part 81 is located at the axial center of the hinge shaft, so that the first rocker arm 7 and the second rocker arm 8 have a relatively balanced force on the hinge shaft, which can ensure the stability of the transmission. The upper end of the drive rod 1 is a Y-shaped structure, so that both axial ends of the hinge shaft are connected to the drive rod 1.

[0043] The driven parts of the first rocker 7 and the second rocker 8 can be directly hinged to the corresponding arc extinguishing assembly moving end 2 through the hinge shaft, or the driven parts of the first rocker 7 and the second rocker 8 can be hinged to the adapter first, and then the adapter is connected to the arc extinguishing assembly moving end 2. The driven parts of the first rocker 7 and the second rocker 8 are the first driven part 72 and the second driven part 82 respectively, and the first driven part 72 and the second driven part 82 are also bifurcated structures, which can clamp the corresponding arc extinguishing assembly moving end 2 or the adapter therein, so that the force on the hinge shaft is relatively balanced.

[0044] The crank includes a rotating part for connecting to the rotating shaft 4 and a connecting part connected to the rocker of the same group. In this embodiment, the rotating part and the connecting part are respectively located at both ends of the length direction of the crank. In other embodiments, the rotating part and the connecting part can also be non-end parts of the crank.

[0045] The rotating part of the second crank 6 is the second rotating part 61, and the second rotating part 61 is a bifurcated structure. The rotating part of the first crank 5 is the first rotating part 51, and the first rotating part 51 is located between the two bifurcated parts of the rotating part of the second crank 6. The first rotating part 51 is located at the axial center of the rotating shaft 4. The rotating shaft 4 circumferentially penetrates the first rotating part 51 and the second rotating part 61. The first rotating part 51 and the second rotating part 61 are both rotatably matched with the rotating shaft 4. The axial ends of the rotating shaft 4 are provided with bearings 9, and the bearings 9 are installed in the corresponding mounting holes. In other embodiments, the rotating shaft 4 can also be directly installed in the mounting hole and the rotating shaft 4 can be fixed, and the bearings 9 can be provided between the rotating shaft 4 and the rotating part of the crank.

[0046] The form of the rotating part of the first crank 5 and the second crank 6 can make the forces exerted by the first crank 5 and the second crank 6 on the rotating shaft 4 more balanced. Compared with the prior art, the forces at both ends of the rotating shaft 4 are equal, so there will be no problem of affecting the life of the corresponding end bearing 9 due to the larger force at one end, thereby affecting the service life of the entire circuit breaker.

[0047] The connecting part of the first crank 5 is the first connecting part 322, and the connecting part of the second crank 6 is the second connecting part 323. The first connecting part 322 and the second connecting part 323 are both forked structures. The first rocker 7 is located between the two forked parts of the first connecting part 322, and the second rocker 8 is located between the two forked parts of the second connecting part 323.

[0048] The connecting part of the crank is connected between the active part and the driven part of the driving rod 1 of the same group, and the connecting part, the driven part and the active part are located on the same straight line. The distance from the connecting part to the rotating part in the same group is equal to the distance from the connecting part to the active part, and also equal to the distance from the connecting part to the driven part. In this way, when the active part moves in a straight line driven by the driving rod 1, and moves along a straight line passing through the rotating axis 4, the driven part will move in a direction perpendicular to the moving direction of the active part, and the extension line of the moving route of the driven part also passes through the rotating axis 4.

[0049] Under the constraint of the crank, the driven part of the rocker arm can move horizontally without any other constraints, thereby only applying a horizontal force to the corresponding moving end 2 of the arc extinguishing assembly, and the moving end 2 of the arc extinguishing assembly will not be subjected to a radial force. Therefore, even if the speed of opening and closing the circuit breaker is fast, the moving end 2 of the arc extinguishing assembly will not bend or deform due to radial impact, thereby ensuring the reliability of use.

[0050] Compared with the prior art, the circuit breaker device does not need to be provided with two crank arms, nor does it need to be provided with two rotating shafts 4, so the transmission device can be simpler and more compact, especially there is no need to connect the transmission through a connecting rod and the driving rod 1 or the moving end 2 of the arc extinguishing assembly, thereby making the overall size of the transmission device smaller, which is more in line with the compactness and miniaturization requirements of the development of circuit breaker equipment.

[0051] In addition, since the transmission device in the circuit breaker device does not need to be provided with a crank arm in the prior art, there will be no problem of collision interference of the crank arm. Moreover, through the design of the crank and the rocker, the force on the transmission shaft and each articulated shaft is more balanced, thereby improving the stability and reliability of the transmission and ensuring that the circuit breaker device as a whole has a longer service life.

[0052] Specific embodiment 2 of the circuit breaker device provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that, see attached Figure 4 In this embodiment, a transmission device only includes a set of cranks and rockers, the crank in the set is the third crank 11, and the rocker is the third rocker 12.

[0053] The circuit breaker device in this embodiment is only provided with one arc extinguishing assembly, the movable end 2 of the arc extinguishing assembly is downward and can move in a vertical straight line driven by the transmission device. The driving rod 1 is arranged horizontally and can move horizontally driven by the driving mechanism.

[0054] The third rocker 12 is connected between the driving rod 1 and the moving end 2 of the arc extinguishing assembly. The horizontal movement of the driving rod 1 can drive the active part of the third rocker 12 to move horizontally, and then drive the driven part of the third rocker 12 to move vertically, and finally drive the moving end 2 of the arc extinguishing assembly to move vertically. In this embodiment, the moving end 2 of the arc extinguishing assembly will still not be subjected to radial forces, which can ensure that the arc extinguishing assembly can work stably and reliably at a higher opening and closing speed. Compared with the prior art using crank arm transmission, its structure will also be simpler and more compact, and smaller in size.

[0055] Specific embodiment 3 of the circuit breaker device provided by the present invention: This embodiment is based on embodiment 2, and the difference from embodiment 2 is that, see attached Figure 5 The circuit breaker device in this embodiment includes three arc extinguishing components, which are arranged at intervals along a horizontal line. The three arc extinguishing components are equal in height and the moving ends are all facing downward.

[0056] In this embodiment, only one driving rod 1 is provided, and the driving rod 1 is located below the three arc extinguishing assemblies. Each arc extinguishing assembly is equipped with a transmission device to transmit between the driving rod 1 and the moving end 2 of the arc extinguishing assembly, that is, there are three transmission devices in this embodiment.

[0057] The rockers in the three transmission devices are the fourth rocker 14, the fifth rocker 16 and the sixth rocker 18, respectively, and the cranks in the three transmission devices are the fourth crank 13, the fifth crank 15 and the sixth crank 17, respectively. The fourth rocker 14, the fifth rocker 16 and the sixth rocker 18 are of equal length and parallel to each other, so that in the process of the movement of the driving rod 1, the three transmission devices can synchronously drive the corresponding arc extinguishing assembly moving end 2 to move, respectively, to achieve the purpose of vertical transmission. However, since the rotating shaft 4 in the three transmission devices needs to be on the extension line of the moving path of the active part of the rocker, in order to avoid the interference between the rotating shaft 4 and the driving rod 1, the driving rod 1 is specially designed in this embodiment, that is, a vertically protruding hinge seat 10 is set on the main rod body of the driving rod 1, and the hinge seat 10 is used to make the main rod body avoid the rotating shaft 4.

[0058] Specific embodiment 4 of the circuit breaker device provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the rotating parts of the two cranks in this embodiment are both non-branched structures, and the rotating parts of the two cranks are arranged at intervals along the axial direction of the rotating shaft.

[0059] Correspondingly, other connection parts, such as the connection part of the crank, the active part and the driven part of the rocker, may also adopt a non-branched structure, which will not be elaborated here.

[0060] Specific embodiment 5 of the circuit breaker device provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the boss is not arranged at the junction of the first connecting portion, the second connecting portion and the first shell, but is arranged on the first shell above this position. In this embodiment, this part is separately reinforced.

[0061] Specific embodiment 6 of the circuit breaker device provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the axis of the rotating shaft is in a vertical state, and the driving rod moves linearly in the horizontal direction, but the moving direction of the driving rod is still perpendicular to the moving direction of the moving end of the arc extinguishing assembly. Therefore, the transmission device in this embodiment performs transmission in a horizontal plane.

[0062] The specific embodiment of the circuit breaker transmission device provided by the present invention is as follows: The circuit breaker transmission device is the transmission device in any one of the above-mentioned embodiments 1-6 of the circuit breaker device, and will not be described in detail here.

[0063] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit breaker transmission device, characterized in that: It includes a mounting shell, a rotating shaft, and a crank and a rocker arranged in a group. The rotating shaft is installed on the mounting shell. The rocker includes an active part for connecting to a driving rod and a driven part for connecting to a moving end of an arc extinguishing assembly. The crank includes a connecting part connected between the driven part and the active part of the same group of rockers and a rotating part connected to the rotating shaft. The connecting part, the driven part and the active part are located on the same straight line. The distance from the connecting part to the rotating part in the same group is equal to the distance from the connecting part to the active part and also equal to the distance from the connecting part to the driven part. When in use, the active part can move in a straight line driven by the driving rod, and the driven part moves in a direction perpendicular to the moving direction of the active part driven by the active part.

2. The circuit breaker transmission device according to claim 1, characterized in that: Two groups of cranks and rockers are provided, the active parts of the two rockers are used to connect to the same driving rod and can rotate coaxially, the driven parts of the two rockers are used to connect to the moving ends of two coaxial and oppositely arranged arc extinguishing assemblies, the rotating parts of the two cranks are connected to the rotating shaft and can rotate coaxially, and the connecting part of each crank is connected to the rocker of the same group.

3. The circuit breaker transmission device according to claim 2, characterized in that: The two cranks are respectively a first crank and a second crank, the rotating part of the second crank is a bifurcated structure, the rotating part of the first crank is located between the two bifurcated parts of the rotating part of the second crank, and the rotating part of the first crank is located at the axial center position of the rotating shaft.

4. The circuit breaker transmission device according to claim 2 or 3, characterized in that: The two rockers are respectively a first rocker and a second rocker. The active portion of the first rocker is a bifurcated structure, and the active portion of the second rocker is located between the two bifurcated portions of the active portion of the first rocker.

5. The circuit breaker transmission device according to claim 2 or 3, characterized in that: The mounting shell comprises a shell body and a boss arranged on the shell body. The boss is provided with a mounting hole for the rotating shaft or a bearing installed on the rotating shaft to be installed. The boss is used to provide support for the end of the rotating shaft.

6. The circuit breaker transmission device according to claim 5, characterized in that: The shell body is a three-way shell, which includes a first shell and a second shell. The first shell is provided with two coaxial interfaces, one end of the second shell is provided with two connecting parts and is connected to the first shell through the connecting parts, and the other end of the second shell is provided with an interface. The interface axis on the second shell is perpendicular to the interface axis on the first shell, and the two connecting parts of the second shell are arranged along the axial direction of the first shell, and the boss is located at the intersection of the two connecting parts and the first shell.

7. The circuit breaker transmission device according to claim 5, characterized in that: A reinforcing rib is arranged between the outer peripheral wall surface of the boss and the outer wall surface of the shell body, and the reinforcing rib is perpendicular to the outer peripheral wall surface of the boss and the outer wall surface of the shell body.

8. The circuit breaker transmission device according to any one of claims 1 to 3, characterized in that: The axis of the rotating shaft is horizontal.

9. The circuit breaker transmission device according to any one of claims 1 to 3, characterized in that: The active part and the driven part are the two ends of the rocker respectively, and the connecting part and the rotating part are the two ends of the crank respectively.

10. A circuit breaker device, comprising an arc extinguishing assembly, a driving assembly, a driving rod connected to the output end of the driving assembly and capable of linear movement, and a transmission device for transmission between the driving rod and the moving end of the arc extinguishing assembly, wherein the moving directions of the driving rod and the moving end of the arc extinguishing assembly are perpendicular, and wherein: The transmission device is a circuit breaker transmission device as described in any one of claims 1 to 9.

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