Transmission mechanism and circuit breaker

Abstract

The utility model discloses a transmission mechanism and a circuit breaker, and belongs to the electrical field, the transmission mechanism comprises a shell, a main shaft and a transmission assembly used for driving a solid-sealed polar pole to move, and the transmission assembly comprises a first crank arm, a first connecting rod, a second connecting rod, a push rod, a first hinge pin, a second hinge pin, a third hinge pin and a sliding pin. According to the transmission mechanism, the multiple connecting rods are designed, so that the transmission efficiency is improved, operating force is reduced, abrasion of parts is reduced, and the service life and stability of products are prolonged. The circuit breaker is simple, reliable, convenient to maintain in the later period and low in cost.

Description

Technical Field

[0001] The present application relates to the electrical field, and in particular to a transmission mechanism and a circuit breaker. Background Art

[0002] my country has a vast territory and the per capita electricity demand is rising rapidly. The use of high-voltage power transmission can significantly reduce the power loss caused by the circuit, but the high-voltage circuit must be cut off with a reliable circuit breaker mechanism to avoid safety accidents during the closing, breaking and current carrying process. The existing circuit breaker transmission mechanism has a large operating force, a complex structure, and its stability and reliability need to be improved. Utility Model Content

[0003] The embodiments of the present application provide a transmission mechanism and a circuit breaker with simple structure, high transmission efficiency and long service life.

[0004] In the first aspect, the present application discloses a transmission mechanism, including a shell, a main shaft and a transmission component for driving the movement of a sealed pole; a slide groove is provided on the shell, and the length direction of the slide groove is consistent with the length direction of the sealed pole; the main shaft is rotatably arranged on the shell; the transmission component includes a first crank arm, a first connecting rod, a second connecting rod, a push rod, a first hinge pin, a second hinge pin, a third hinge pin and a sliding pin; the first crank arm is arranged on the main shaft; one end of the first connecting rod is hinged to the first crank arm, and the other end is hinged to one end of the second connecting rod through the first hinge pin, and the other end of the second connecting rod is hinged to the shell through the second hinge pin; one end of the push rod is hinged to the second connecting rod through the third hinge pin; the sliding pin is arranged on the push rod, and the sliding pin is passed through the slide groove and can slide along the length direction of the slide groove; the push rod is used to drive the movement of the sealed pole.

[0005] In the second aspect, the present application discloses a circuit breaker, including a sealed pole, an operating mechanism and a transmission mechanism; multiple sealed poles are arranged on the housing of the transmission mechanism; multiple transmission components are connected to the sealed poles one by one; the operating mechanism is arranged in the housing, and the operating mechanism is connected to the main shaft of the transmission mechanism, which is used to drive the main shaft to drive the sealed pole to move.

[0006] The transmission mechanism and circuit breaker of the present application have at least the following beneficial effects:

[0007] The transmission mechanism of the present application includes a housing, a main shaft and a transmission assembly for driving the movement of the sealed pole, and the transmission assembly includes a first crank arm, a first connecting rod, a second connecting rod, a push rod, a first hinge pin, a second hinge pin, a third hinge pin and a sliding pin; during the closing operation, the main shaft drives the first crank arm to rotate, the first crank arm drives the first connecting rod to push the second connecting rod upward, the second connecting rod thereby pushes the push rod to move, and the push rod then pushes the sealed pole to switch the working state. The transmission mechanism of the present application has a simple and reliable structure, is easy to maintain in the later stage, has a low cost, and through structural optimization, increases the transmission efficiency, reduces the operating force, reduces the wear of parts, and increases the life and stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0009] Figure 1 is a side view of the transmission mechanism of the embodiment of the present application (the side plate of the housing is hidden);

[0010] Figure 2 It is a front view of the transmission mechanism of the embodiment of the present application (the front end plate of the housing is hidden);

[0011] Figure 3 is a top cross-sectional view of the transmission mechanism of the embodiment of the present application;

[0012] Figure 4 It is a schematic diagram of the vertical partition and part of the shell;

[0013] Figure 5 It is a partial schematic diagram of the transmission assembly;

[0014] Figure 6 It is a partial schematic diagram of the opening buffer component;

[0015] Figure 7 is a partial schematic diagram of the auxiliary switch assembly;

[0016] Figure 8 is a structural schematic diagram of a circuit breaker according to an embodiment of the present application;

[0017] Fig. 9 yes Figure 8 A top view of the housing (showing the internal structure of the housing);

[0018] Fig.10 It is a partial structural diagram of the sign assembly;

[0019] Description of the reference numerals is as follows:

[0020] 100. Transmission mechanism;

[0021] 10. Shell; 11. Slide; 12. Vertical partition;

[0022] 20. Spindle;

[0023] 30. Transmission assembly; 31. First crank arm; 32. First connecting rod; 33. Second connecting rod; 34. Push rod; 341. Connecting column; 35. First hinge pin; 36. Second hinge pin; 37. Third hinge pin; 38. Sliding pin; 39. Joint bearing;

[0024] 40. Second crutch arm;

[0025] 50. Opening spring; 51. First hanging plate; 52. Second hanging plate;

[0026] 60. Disconnection buffer assembly; 61. Base; 62. Connecting arm; 63. Buffer;

[0027] 70. Auxiliary switch assembly; 71. Auxiliary switch; 72. First auxiliary arm; 73. Second auxiliary arm; 74. Clamp;

[0028] 200, sealed pole;

[0029] 300, operating mechanism;

[0030] 400, sign assembly; 401, third turning arm; 402, conversion arm; 403, third auxiliary arm; 404, sign. DETAILED DESCRIPTION

[0031] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] This embodiment discloses a transmission mechanism and a circuit breaker. First, the transmission mechanism 100 is introduced as follows.

[0034] like Figures 1 to 3 As shown, the transmission mechanism 100 includes a housing 10, a main shaft 20 and a transmission assembly 30 for driving the sealed pole 200 to move; each component is arranged inside or on the housing 10, and the main shaft 20 is rotatably arranged inside the housing 10. The main shaft 20 is used to drive the sealed pole 200 to perform telescopic movement, so that the sealed pole 200 switches the working state; the transmission assembly 30 is connected between the main shaft 20 and the sealed pole 200 to transmit power.

[0035] like Figure 4 As shown, the housing 10 is in the shape of a square shell, and a plurality of vertical partitions 12 are arranged inside the housing, and the plurality of vertical partitions 12 are arranged at intervals along a first horizontal direction, and the upper surface of the vertical partition 12 is connected to the inner top surface of the housing 10, and one side surface of the vertical partition 12 along a second horizontal direction is connected to the inner side surface of the housing 10. The first horizontal direction and the second horizontal direction intersect vertically.

[0036] like Figure 4 As shown, in this embodiment, there are four vertical partitions 12. By providing multiple vertical partitions 12, the strength of the housing 10 can be strengthened, and the vertical partitions 12 can also provide installation positions for the transmission assembly 30. Further, the two horizontal side walls of the housing 10 and each vertical partition 12 are provided with a slide groove 11, and the slide groove 11 is used to install the sliding pin 38 of the transmission assembly 30, wherein the length direction of the slide groove 11 is configured as the first horizontal direction, and the first horizontal direction is also the length direction of the sealed pole 200.

[0037] like Figure 2 As shown, the main shaft 20 is horizontally rotatably disposed inside the housing 10, and the length direction of the main shaft 20 is configured as a second horizontal direction.

[0038] The number of the transmission assemblies 30 is consistent with the number of the sealed poles 200, and the transmission assemblies 30 are connected to the sealed poles 200 in a one-to-one correspondence. In this embodiment, there are three transmission assemblies 30. The three transmission assemblies 30 are respectively arranged between the vertical partition 12 and the inner side of the housing 10 and between the two vertical partitions 12.

[0039] like Figure 1 and Figure 5 As shown, the transmission assembly 30 includes a first crank arm 31 , a first connecting rod 32 , a second connecting rod 33 , a push rod 34 , a first hinge pin 35 , a second hinge pin 36 , a third hinge pin 37 and a sliding pin 38 .

[0040] like Figure 5 As shown, the first crank arm 31 is fixedly arranged on the outer periphery of the main shaft 20, one end of the first connecting rod 32 is hinged to the first crank arm 31, the other end of the first connecting rod 32 is hinged to one end of the second connecting rod 33 through the first hinge pin 35, and the other end of the second connecting rod 33 is hinged to the shell 10 or the vertical partition 12 through the second hinge pin 36; one end of the push rod 34 is hinged to the second connecting rod 33 through the third hinge pin 37; the sliding pin 38 is arranged on the push rod 34, and the sliding pin 38 is penetrated in the slide groove 11 of the shell 10 or the slide groove 11 of the vertical partition along the second horizontal direction, and the sliding pin 38 is restricted by the slide groove 11 so that the sliding pin 38 can only reciprocate in the length direction of the slide groove 11, wherein the push rod 34 is used to drive the sealed pole 200 to perform telescopic movement.

[0041] In some embodiments, preferably, Figure 5 As shown, the push rod 34 is connected to the sealed pole 200 through the joint bearing 39 and pushes the sealed pole 200 to move. A plurality of connecting posts 341 are provided on the push rod 34. The joint bearing 39 can select any one of the connecting posts 341 and connect thereto, and the end of the joint bearing 39 away from the connecting post 341 is connected to the sealed pole 200. In this embodiment, the joint bearing 39 is selected to be connected to the sealed pole 200, which can ensure the flexibility of the connection point and improve the flexibility during installation. In addition, by using the matching mode of multiple connecting posts 341, the joint bearing 39 can arbitrarily select the connection position with the connecting post 341 according to the installation requirements.

[0042] In some embodiments, preferably, Figure 1 As shown, the center distance from the first hinge pin 35 to the third hinge pin 37 is defined as L 1 The center distance of the second hinge pin 36 to the third hinge pin 37 is defined as L 2 , L 2 Equal to 2 to 5 times L 1 , for example L 2 Equal to 2 to 3 times L1 By designing the distance between the connection points of the first connecting rod 32 and the push rod 34 on the second connecting rod 33, it is possible to achieve a relatively large displacement of the push rod 34 and the spherical bearing 39 by rotating the main shaft 20 at a relatively small angle, thereby achieving a higher transmission efficiency.

[0043] like Figure 1 As shown, the transmission mechanism 100 further includes a second crank arm 40 and a switch-off spring 50. The second crank arm 40 is fixedly arranged on the main shaft 20. The switch-off spring 50 is respectively connected to the second crank arm 40 and the housing 10. In the closed state, the switch-off spring 50 is pulled. Therefore, after the force on the main shaft 20 is removed, the switch-off spring 50 drives the main shaft 20 to reset and rotate, thereby realizing automatic switch-off. A first hanging plate 51 is arranged on the inner top surface of the housing 10, a second hanging plate 52 is hinged on the second crank arm 40, and two ends of the switch-off spring 50 are respectively connected to the first hanging plate 51 and the second hanging plate 52.

[0044] In some embodiments, preferably, Figure 6 As shown, the transmission mechanism 100 also includes a brake-opening buffer assembly 60, which is used to buffer and decelerate the main shaft 20 when the brake is opened to avoid hard impact of parts. The brake-opening buffer assembly 60 includes a base 61, a connecting arm 62 and a buffer 63. The base 61 is fixedly mounted on the inner bottom surface of the housing 10, the connecting arm 62 is fixed on the main shaft 20, and the buffer 63 is vertically arranged on the base 61. One end of the connecting arm 62 is hinged to the top of the buffer 63. When the main shaft 20 rotates in the brake-opening state, the connecting arm 62 presses the buffer 63 downward, and the buffer 63 is subjected to force and buffers the rotation of the main shaft 20. Among them, the buffer member 63 is configured as a one-way damping structure (for example, a one-way damping oil buffer), and the resistance direction of the one-way damping structure is configured as the downward pressing direction of the connecting arm 62, that is, when the connecting arm 62 presses the one-way damping structure downward, the one-way damping structure provides a damping force for the connecting arm 62. When the connecting arm 62 is lifted upward, the one-way damping structure will not hinder the lifting of the connecting arm 62, thereby ensuring that the main shaft 20 can rotate quickly during the closing movement.

[0045] like Figure 7As shown, the transmission mechanism 100 also includes an auxiliary switch assembly 70; the auxiliary switch assembly 70 includes an auxiliary switch 71, a first auxiliary arm 72 and a second auxiliary arm 73; the auxiliary switch 71 is fixed on the inner side of the housing 10, the first auxiliary arm 72 is fixed on the main shaft 20, one end of the second auxiliary arm 73 is hinged on the first auxiliary arm 72, and the other end of the second auxiliary arm 73 is hinged with a clamp 74, and the clamp 74 is clamped on the input end of the auxiliary switch 71. When the main shaft 20 is opened and closed, the first auxiliary arm 72 and the second auxiliary arm 73 drive the contacts inside the auxiliary switch 71 to open and close, and the auxiliary switch 71 transmits the generated signal to the external system. In this embodiment, the auxiliary switch assembly 70 can be designed to feedback the opening and closing states of the main shaft 20.

[0046] like Figure 8 and Fig. 9 As shown, a circuit breaker disclosed in this embodiment includes a sealed pole 200, an operating mechanism 300 and the transmission mechanism 100. The three sealed poles 200 are all arranged on the housing 10 of the transmission mechanism 100 and are all located on the outside of the housing 10. The three transmission assemblies 30 are connected to the three sealed poles 200 in a one-to-one correspondence; the specific form of the sealed pole 200 refers to the prior art. The operating mechanism 300 is arranged in the housing 10 of the transmission mechanism 100, and the operating mechanism 300 is connected to the main shaft 20 of the transmission mechanism 100. The operating mechanism 300 is used to drive the main shaft 20 of the transmission mechanism 100 to rotate, that is, when the staff presses the closing button of the operating mechanism 300, the main shaft 20 drives the joint bearing 39 to push the sealed pole 200 to switch to the closing state. When the staff presses the opening button of the operating mechanism 300, the operating mechanism 300 removes the force on the main shaft 20, and the main shaft 20 rotates and resets due to the reset force of the opening spring 50, and the joint bearing 39 then pulls the sealed pole 200 to switch to the opening state. In this embodiment, the operating mechanism 300 can refer to the prior art, and the prior art of such a structure is relatively mature and will not be repeated here.

[0047] like Fig.10As shown, the circuit breaker of this embodiment also includes an indicator sign assembly 400, which includes a third crank arm 401, a conversion arm 402, a third auxiliary arm 403 and an indicator sign 404; the third crank arm 401 is fixedly arranged on the main shaft 20, the conversion arm 402 is L-shaped, the middle part of the conversion arm 402 is hinged to the inside of the housing 10 or is hinged to the operating mechanism 300, one end of the third auxiliary arm 403 is hinged to the third crank arm 401, the other end of the third auxiliary arm 403 is hinged to one end of the conversion arm 402, and an indicator sign 404 is arranged on the other end of the conversion arm 402, and two indicating surfaces are arranged on the indicator sign 404, and the indicating surfaces are used to feedback the working status of the sealed pole 200, and an indicating window is arranged on the front end plate of the housing 10, and the indicating window can expose a certain indicating surface, so that an outsider can observe the working status of the sealed pole 200. There is a certain angle between the two indicating surfaces (for example, 150 to 170 degrees), and the angle is convenient for driving the two indicating surfaces to switch to correspond to the indicating window when the conversion arm 402 rotates. The specific working principle is: when closing the switch, the main shaft 20 rotates, the third auxiliary arm 403 drives the conversion arm 402 to rotate, and the conversion arm 402 drives one indicating surface of the indicator board 404 (i.e., the indicating surface indicating the closing state) to switch to a state corresponding to the indicating window. Conversely, when opening the switch, the conversion arm 402 drives the other indicating surface of the indicator board 404 (i.e., the indicating surface indicating the opening state) to switch to a state corresponding to the indicating window.

[0048] A working mode of the circuit breaker of this embodiment is as follows:

[0049] 1. When closing the circuit breaker, the operating mechanism 300 drives the main shaft 20 to rotate, the first crank arm 31 on the main shaft 20 drives the first connecting rod 32 to move upward, the upper end of the first connecting rod 32 pushes the end of the second connecting rod 33 to lift upward, and the push rod 34 and the joint bearing 39 connected to the second connecting rod 33 push the sealed pole 200 forward along the first horizontal direction, and the three sealed poles 200 act synchronously, thereby realizing the closing operation; during the closing process of the main shaft 20, the auxiliary switch assembly 70 and the indicator assembly 400 connected to the main shaft 20 act synchronously, the auxiliary switch 71 transmits the closing signal to the external system, and the indicator 404 switches the indication surface corresponding to the indication window;

[0050] 2. When opening the switch, the operating mechanism 300 removes the force on the main shaft 20, and the tensioned opening spring 50 immediately drives the main shaft 20 to rotate. The first crank arm 31 on the main shaft 20 pulls the first connecting rod 32 to move downward, and the push rod 34 and the joint bearing 39 connected to the second connecting rod 33 pull the sealed pole 200 backward along the first horizontal direction to achieve the opening operation. The auxiliary switch 71 transmits the opening signal to the external system, and the indicator plate 404 switches the indication surface corresponding to the indication window; during the opening rotation of the main shaft 20, the connecting arm 62 presses the buffer 63 downward, and the buffer 63 provides a damping force for the rotation of the main shaft 20 to avoid hard impact.

[0051] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A transmission mechanism, characterized in that: It comprises a housing (10), a main shaft (20) and a transmission assembly (30) for driving the sealed pole to move; The housing (10) is provided with a slide groove (11), and the length direction of the slide groove (11) is consistent with the length direction of the sealed pole; the main shaft (20) is rotatably arranged on the housing (10); The transmission assembly (30) comprises a first crank arm (31), a first connecting rod (32), a second connecting rod (33), a push rod (34), a first hinge pin (35), a second hinge pin (36), a third hinge pin (37) and a sliding pin (38); the first crank arm (31) is arranged on the main shaft (20); one end of the first connecting rod (32) is hinged to the first crank arm (31), and the other end is hinged to one end of the second connecting rod (33) through the first hinge pin (35), and the other end of the second connecting rod (33) is hinged to the housing (10) through the second hinge pin (36); one end of the push rod (34) is hinged to the second connecting rod (33) through the third hinge pin (37); the sliding pin (38) is arranged on the push rod (34), and the sliding pin (38) is inserted into the slide groove (11) and can slide along the length direction of the slide groove (11); the push rod (34) is used to drive the movement of the sealed pole.

2. The transmission mechanism according to claim 1, characterized in that: A plurality of vertical partitions (12) are arranged inside the shell (10), and the slide grooves (11) are arranged on the vertical partitions (12) and the shell (10).

3. The transmission mechanism according to claim 1, characterized in that: The center distance between the first hinge pin (35) and the third hinge pin (37) is defined as L1; the center distance between the second hinge pin (36) and the third hinge pin (37) is defined as L2, and L2 is equal to 2 to 5 times of L1.

4. The transmission mechanism according to claim 1, characterized in that: The transmission assembly (30) further comprises a joint bearing (39); a plurality of connecting columns (341) are arranged on the push rod (34); the joint bearing (39) is connected to any one of the connecting columns (341), and one end of the joint bearing (39) facing away from the push rod (34) is connected to the sealed pole.

5. The transmission mechanism according to claim 1, characterized in that: It also includes a second crank arm (40) and a trip spring (50); the second crank arm (40) is arranged on the main shaft (20); the two ends of the trip spring (50) are respectively connected to the second crank arm (40) and the housing (10), and the trip spring (50) drives the push rod (34) along the length direction of the slide groove (11) away from the sealed pole.

6. The transmission mechanism according to any one of claims 1 to 5, characterized in that: The invention also comprises a switch-off buffer assembly (60); the switch-off buffer assembly (60) comprises a base (61), a connecting arm (62) and a buffer member (63); the base (61) is arranged in the housing (10); the connecting arm (62) is arranged on the main shaft (20); the buffer member (63) is arranged on the base (61), and the buffer member (63) is connected to the connecting arm (62), and the rotation of the main shaft (20) is buffered by the buffer member (63).

7. The transmission mechanism according to claim 6, characterized in that: The buffer member (63) is configured as a one-way damping structure, and the resistance direction of the one-way damping structure is configured as the downward pressing direction of the connecting arm (62).

8. The transmission mechanism according to any one of claims 1 to 5, characterized in that: The invention also comprises an auxiliary switch assembly (70); the auxiliary switch assembly (70) comprises an auxiliary switch (71), a first auxiliary arm (72) and a second auxiliary arm (73); the auxiliary switch (71) is arranged on the housing (10); the first auxiliary arm (72) is arranged on the main shaft (20); one end of the second auxiliary arm (73) is hinged to the first auxiliary arm (72), and the other end is connected to the auxiliary switch (71).

9. A circuit breaker, characterized in that: It comprises a sealed pole (200), an operating mechanism (300) and a transmission mechanism (100) as claimed in any one of claims 1 to 8; a plurality of sealed poles (200) are arranged on a housing (10) of the transmission mechanism; a plurality of transmission assemblies (30) are connected to the sealed poles (200) in a one-to-one correspondence; the operating mechanism (300) is arranged in the housing (10), and the operating mechanism (300) is connected to a main shaft (20) of the transmission mechanism, and is used to drive the main shaft (20) to drive the sealed pole (200) to move.

10. The circuit breaker according to claim 9, characterized in that The invention also comprises an indicator sign assembly (400); the indicator sign assembly (400) comprises a third crank arm (401), a conversion arm (402), a third auxiliary arm (403) and an indicator sign (404); the third crank arm (401) is arranged on the main shaft (20); the conversion arm (402) is hinged on the operating mechanism (300) or on the housing (10) of the transmission mechanism; one end of the third auxiliary arm (403) is hinged to the third crank arm (401), and the other end is hinged to one end of the conversion arm (402); the indicator sign (404) is arranged on the other end of the conversion arm (402), and two indicator surfaces for feeding back the working state of the sealed pole (200) are arranged on the indicator sign (404), and any one of the indicator surfaces can correspond to the indicator window on the housing (10).

Images