Transmission module and circuit breaker

Abstract

The utility model discloses a transmission module, which comprises a rotating shaft, a connecting rod, a driving crank arm, a driving cam and a brake block, and the connecting rod, the driving cam and the brake block integrally act on the driving crank arm. A circuit breaker comprises an operating mechanism, a longitudinal beam, a pole assembly and a transmission module. The longitudinal beam is rotationally arranged on the operating mechanism, the pole assembly is arranged on the longitudinal beam, and the transmission module is arranged in the longitudinal beam and connected with the pole assembly. The tightness of a transmission module mechanism is improved, the overall space of a transmission module is compressed, and the space occupation of the transmission module in a circuit breaker is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment, and in particular to a transmission module and a circuit breaker. Background Technology

[0002] Circuit breakers typically include a transmission module for closing and opening the vacuum arc chamber of the pole. Existing transmission modules use a rotating shaft to drive a connecting rod in a reciprocating motion to complete closing and opening. Usually, the drive crank arm, brake crank arm, and output crank arm are each independently mounted on the rotating shaft. When the pole is opened, the transmission module experiences a large driving force, and the clearance between components is too large. This can lead to instability in mechanical characteristics during rapid movement, as well as excessive motion impact and noise. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art, the present invention provides a transmission module to improve the compactness of the transmission module mechanism, compress the overall space of the transmission module, reduce the space occupied by the transmission module in the circuit breaker, and further enhance the stability of mechanical characteristics, reduce motion impact and motion noise.

[0004] The technical solution adopted by this utility model to solve its problem is:

[0005] A transmission module includes a rotating shaft, a connecting rod, a drive crank arm, a drive cam, and a brake block;

[0006] The drive crank arm includes a connecting seat and an extension arm. The connecting seat is disposed on the rotating shaft, and one end of the extension arm is disposed on the connecting seat, while the other end extends radially away from the rotating shaft as an abutment end.

[0007] The connecting rod is hinged to the connecting seat, and the connecting rod is arranged radially along the rotating shaft;

[0008] The drive cam is rotatably disposed below the abutment end, and one side of the drive cam is defined as the drive surface. One end of the drive surface extends away from the rotation center of the drive cam to serve as the drive end. The drive surface abuts against the abutment end below. The brake block is rotatably disposed above the extension arm, and one end of the brake block is defined as the brake end. The brake end is disposed towards the top of the extension arm.

[0009] The drive cam rotates counterclockwise and in conjunction with the extension arm and the rotating shaft rotate clockwise. When the drive end rotates from the lowest point to the highest point, it abuts against the abutting end that rotates from the lowest point to the highest point. The top of the extension arm abuts against the brake end and stops rotating.

[0010] The brake block rotates counterclockwise, the brake end acts on the top of the extension arm and drives the extension arm to rotate counterclockwise, the extension arm drives the shaft to rotate counterclockwise and the drive cam to rotate clockwise, until the drive end and the abutment end rotate back to their respective lowest points.

[0011] Furthermore, it also includes connecting arms and buffer components;

[0012] One end of the connecting arm is connected to the rotating shaft, and the other end acts on the buffer.

[0013] The rotating shaft rotates clockwise or counterclockwise to drive the connecting rod to reciprocate along its own length. When the rotating shaft rotates rapidly in either clockwise or counterclockwise, the buffer member applies a buffering force to the rotating shaft through the connecting arm to mitigate the rapid rotation.

[0014] Furthermore, the drive crank arm also includes an abutment wheel;

[0015] The abutting wheel is rotatably mounted on the abutting end, and the abutting end acts on the driving cam through the abutting wheel.

[0016] Furthermore, it also includes at least one hinge lug;

[0017] One end of the hinge lug is hinged to the connecting rod, and the other end is hinged to the connecting seat.

[0018] Furthermore, there are two hinge ears, which are respectively located on both sides of the connecting rod.

[0019] Furthermore, it also includes a rotating wheel, which is rotatably disposed at one end of the connecting arm away from the rotating shaft, and one end of the buffer is connected to the rotating wheel.

[0020] Furthermore, the buffer is an oil buffer.

[0021] Furthermore, the connecting rod includes a rod body and an adjusting element;

[0022] The adjusting component includes a stud, a screw seat, and a locking screw seat. One end of the screw seat has a screw hole, and the other end of the screw seat is connected to the rod body. One end of the stud is hinged to the rotating shaft, and the other end is screwed into the screw hole. The locking screw seat is screwed onto the stud and located outside the screw hole. The locking screw seat spirals towards the screw seat and abuts against the screw seat.

[0023] A circuit breaker includes an operating mechanism, a longitudinal beam, a pole assembly, and the aforementioned transmission module;

[0024] The longitudinal beam is rotatably mounted on the operating mechanism, the pole post assembly is mounted on the longitudinal beam, and the transmission module is mounted in the longitudinal beam and connected to the pole post assembly.

[0025] In summary, the transmission module provided by this utility model has the following technical effects:

[0026] The connecting rod, drive crank arm, and brake block are all connected to the drive cam, which reduces the clearance between the components, enhances the compactness of the space, and effectively avoids the problems of unstable mechanical characteristics, excessive motion impact, and motion noise caused by excessive clearance between the components when the circuit breaker pole is tripped, under the condition that the transmission module is subjected to a large driving force. Attached Figure Description

[0027] Figure 1 This is a side view of the transmission module in the closed state according to an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 3D view of the transmission module;

[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This is a side view of the transmission module in the open state according to an embodiment of the present utility model;

[0031] Figure 5 for Figure 4 3D view of the transmission module;

[0032] Figure 6 This is a schematic diagram of a circuit breaker.

[0033] The meanings of the reference numerals in the attached figures are as follows:

[0034] 10. Rotating shaft; 20. Connecting rod; 21. Rod body; 22. Adjusting component; 221. Stud; 222. Screw seat; 223. Locking screw seat; 30. Connecting arm; 40. Buffer component; 50. Hinge ear; 60. Drive crank arm; 61. Connecting seat; 62. Extension arm; 621. Abutting end; 63. Abutting wheel; 70. Rotating wheel; 80. Operating mechanism; 90. Longitudinal beam; 11. Pole post assembly; 12. Insulating pull rod; 13. Drive cam; 131. Drive surface; 1311. Drive end; 14. Brake block; 141. Setting end. Detailed Implementation

[0035] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0036] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] See Figure 1 and Figure 4 This utility model discloses a device including a rotating shaft 10, a connecting rod 20, a connecting arm 30, and a buffer member 40. The connecting rod 20 is hinged to the rotating shaft 10 and is arranged radially along the rotating shaft 10. One end of the connecting arm 30 is connected to the rotating shaft 10, and the other end acts on the buffer member 40. The rotating shaft 10 rotates clockwise or counterclockwise to drive the connecting rod 20 to reciprocate along its own length. When the rotating shaft 10 rotates rapidly in either clockwise or counterclockwise direction, the buffer member 40 applies a buffering force to the rotating shaft 10 through the connecting arm 30 to mitigate the rapid rotation.

[0039] In this embodiment, the transmission module is applied in a longitudinal rotary vacuum circuit breaker, according to existing technology; see reference. Figure 6 A circuit breaker includes an operating mechanism 80, a longitudinal beam 90, a pole assembly 11 (usually a three-phase pole), and a transmission module. The longitudinal beam 90 is rotatably mounted on the operating mechanism 80, and the pole assembly 11 is mounted on the longitudinal beam 90. Specifically, the three-phase poles are mounted on the outer surface of the longitudinal beam. The transmission module is mounted in the longitudinal beam 90 and connected to the three-phase poles. The connecting rod 20 controls the closing and closing of the three-phase poles via an insulating pull rod 12, which will not be described in detail here.

[0040] In this embodiment, the rotating shaft 10 is rotatably mounted on the operating mechanism 80. One end of the connecting rod 20 is hinged to the connecting rod 20 and arranged in the horizontal direction. Preferably, the connecting rod 20 is located above or below the horizontal plane where the rotating shaft 10 is located (this embodiment uses the upper part as an example). The significance of this arrangement is that the rotating shaft 10 drives the connecting rod 20 to move linearly through rotation. When the connecting rod 20 is located above or below the horizontal plane where the rotating shaft 10 is located, when the rotating shaft 10 rotates at a specific angle, especially when the hinge point between the connecting rod 20 and the rotating shaft 10 moves from one side of the rotating shaft 10 to the same height point on the other side of the rotating shaft 10, the vertical movement distance of the hinge point between the connecting rod 20 and the rotating shaft 10 is small, and the vertical jump of the connecting rod 20 is small, ensuring the stability of the movement of the connecting rod 20 and the connecting rod 20 and the rotating shaft 10 are not prone to jamming, thus preventing the rotating shaft 10 from failing to achieve a specific rotation angle. One end of the connecting arm 30 is fixedly mounted on the rotating shaft 10, while the other end is a free end, which changes position as the rotating shaft 10 rotates.

[0041] In this embodiment, the initial state is the open state, at which point the free end of the connecting arm 30 is on one side of the rotating shaft 10, and the free end is at its lowest point. The buffer 40 is located below the free end and is in a compressed state. At this time, the hinge point between the connecting rod 20 and the rotating shaft 10 and the connecting arm 30 may be on the same side of the rotating shaft 10 or on opposite sides due to the angle of rotation, but it is certain that the connecting rod 20 is in the state closest to the rotating shaft 10. For ease of description, this is described with the hinge point between the connecting rod 20 and the rotating shaft 10 and the connecting arm 30 on the same side of the rotating shaft 10.

[0042] Next, refer to Figure 2 and Figure 3 When the rotating shaft 10 rotates clockwise, the free end of the connecting arm 30 displaces upward, the buffer 40 extends upward along with the connecting arm 30, and the connecting rod 20 moves away from the rotating shaft 10. The connecting rod 20 closes the circuit breaker via the lower contact operating pole. Once closing is complete, the rotating shaft 10 stops rotating clockwise, the free end of the connecting arm 30 reaches its highest point, and the buffer 40 is in an extended state. It should be noted that at this time, the hinge point between the connecting rod 20 and the rotating shaft 10 and the connecting arm 30 are located on opposite sides of the rotating shaft 10. Furthermore, in this embodiment, the clockwise rotation of the rotating shaft 10 can be driven by a motor.

[0043] Conversely, if the terminal block trips, refer to [reference needed]. Figure 5 At this time, the connecting rod 20 is released, and the connecting rod 20 returns to the direction close to the rotating shaft 10. The rotating shaft 10 reverses (counterclockwise), and the connecting arm 30 moves from the highest point to the lowest point. At this time, the buffer 40 provides resistance when the free end rotates downward, thereby providing buffer for the connecting rod 20 to return to its original position. After the above components return to the initial state, this is the open state.

[0044] Optionally, it also includes a drive crank arm 60, a drive cam 13, and a brake block 14; the drive crank arm 60 includes a connecting seat 61 and an extension arm 62, the connecting seat 61 is disposed on the rotating shaft 10, one end of the extension arm 62 is disposed on the connecting seat 61, and the other end extends radially away from the rotating shaft 10 as an abutment end 621; the drive cam 13 is rotatably disposed below the abutment end 621, and one side of the drive cam 13 is defined as a drive surface 131, one end of the drive surface 131 extends away from the rotation center of the drive cam 13 to serve as a drive end 1311, the drive surface 131 abuts against the abutment end 621, and the brake block 14 is rotatably disposed above the extension arm 62, with one end of the brake block 14 serving as the brake end. 141, the braking end is positioned facing the top of the extension arm 62; wherein, the drive cam 13 rotates counterclockwise and in conjunction with the extension arm 62 and the rotating shaft 10 rotate clockwise, when the drive end 1311 rotates from the lowest point to the highest point, it abuts against the abutting end 621 which rotates from the lowest point to the highest point, the top of the extension arm 62 abuts against the braking end 141 and stops rotating, and the end of the connecting arm 30 connected to the buffer 40 is located at the highest point; the brake block 14 rotates counterclockwise, the braking end 141 acts on the top of the extension arm 62 and in conjunction with the extension arm 62 rotates counterclockwise, the extension arm 62 in conjunction with the rotating shaft 10 rotates counterclockwise and the drive cam 13 rotates clockwise, until the drive end 1311 and the abutting end 621 rotate back to their respective lowest points.

[0045] For example, the connecting seat 61 is a square block, and the connecting seat 61 is disposed in the middle of the rotating shaft 10. The extension arm 62 is on the side of the rotating shaft 10 away from the connecting rod 20, and extends in a direction away from the connecting rod 20.

[0046] Based on the foregoing description, in the initial state, the free end of the connecting arm 30 is located at its lowest point, and the extension arm 62 is inclined downwards. Preferably, the top surface of the extension arm 62 is a downwardly inclined surface; the driving surface 131 is an arc surface. Specifically, according to the prior art, the cam body is a circle, one end of the arc surface is tangent to the outer wall of the circle, and the other end extends outwards, which will not be elaborated here. The brake block 14 is a strip structure.

[0047] Similarly, at this time, both the abutment end 621 and the drive end 1311 are at their respective lowest points. In this embodiment, the drive cam 13 drives the rotation of the drive shaft 10 in either the forward or reverse direction. Therefore, the aforementioned extension arm 62 rotates counterclockwise to lift the extension arm 61, and the drive end 1311 and the abutment end 621 contact each other at their respective highest points. At this time, the brake end 141 abuts against the downward inclined surface to prevent the drive cam 13 from rotating too much and to avoid the drive cam 13 and the extension arm 62 from disengaging. Most importantly, during this process, the extension arm 61 drives the southeast shaft 10 to rotate clockwise, thus driving the movement of the connecting rod 20. Conversely, the counterclockwise rotation of the drive cam 13 requires the counterclockwise rotation of the brake block 14 to drive it. At this time, the shaft 10 rotates counterclockwise, and finally, the drive end 1311 and the abutment end 621 rotate back to their respective lowest points.

[0048] For example, in this embodiment, the drive cam 13 and the brake block 14 can be driven by an existing energy storage mechanism (energy storage motor), because the energy storage mechanism can be driven actively or passively, so as to enable mutual drive switching between the brake block 14 and the drive cam 13 as described above.

[0049] It should be noted that in this embodiment, the connecting rod 20, the drive cam 13 and the brake block 14 are all connected to the drive crank arm 60. This integrates the main drive components of the transmission module in terms of connection relationship, enhances the tightness of the overall structure, reduces the fit gap between components, and when the pole is open, even if the transmission module is subjected to a large driving force, the components are less likely to have unstable mechanical characteristics, generate excessive motion impact and motion noise.

[0050] In addition, it should be explained in detail that the transmission module is subjected to a large driving force when the circuit is opened, so this is when the aforementioned rotating shaft 10 rotates rapidly. At this time, the rotating shaft rotates counterclockwise, the free end of the connecting arm 30 rotates downward, and the buffer 40 provides corresponding buffering.

[0051] Optionally, the drive crank arm 60 also includes an abutment wheel 63; the abutment wheel 63 is rotatably disposed on the abutment end 621, and the abutment end 621 acts on the drive cam 13 through the abutment wheel 63.

[0052] In the aforementioned process, the contact end 621 rubs against the driving surface 131 during the lifting process. Here, the contact wheel 63 transforms sliding friction into rolling friction, thereby reducing friction.

[0053] Optionally, it also includes at least one hinge lug 50; one end of the hinge lug 50 is hinged to the connecting rod 20, and the other end is hinged to the connecting seat 61.

[0054] The hinge ear 50 has a straight groove structure. Preferably, the length of the hinge ear 50 is greater than or equal to the diameter of the rotating shaft 10, so that the hinge ear 50 can swing around the rotating shaft 10 with sufficient length. The relative motion fluctuation between the two ends of the hinge ear 50 is small, which also has a relatively small impact on the connecting rod 20.

[0055] Optionally, there are two hinge ears 50, which are located on both sides of the connecting rod 20.

[0056] It can be understood that the two hinge lugs 50 ensure the stability of the connection between the connecting rod 20 and the rotating shaft 10.

[0057] Optionally, it also includes a rotating wheel 70, which is rotatably disposed at the end of the connecting arm 30 away from the rotating shaft 10, and one end of the buffer 40 is connected to the rotating wheel 70.

[0058] As can be seen from the foregoing, the free end moves in a rotating manner, thus the free end has both lateral and vertical movements. Therefore, the buffer 40 is movably connected to the connecting arm 30 through the rotating wheel 70 to prevent jamming when the buffer 40 and the free end interact.

[0059] Optionally, buffer 40 is an oil buffer.

[0060] The oil damper is existing technology and will not be elaborated upon here. It should be noted that the oil damper has the characteristics of high resistance and good buffering effect. Alternatively, the buffer element 40 can be considered a spring. Specifically, at its highest point, the free end is at its natural length. When the free end rotates downwards, the spring compresses, providing an upward elastic force to resist resistance.

[0061] It should be noted that because the forward and reverse rotation angles of the rotating shaft 10 are relatively small, the lateral displacement of its free end is relatively small (the free end is always on the same side of the rotating shaft 10). This ensures that even if the buffer 40 does not follow the lateral movement, its vertical movement will not jam.

[0062] Optionally, the connecting rod 20 includes a rod body 21 and an adjusting component 22; the adjusting component 22 includes a stud 221, a screw seat 222, and a locking screw seat 223. One end of the screw seat 222 is provided with a screw hole, and the other end of the screw seat 222 is connected to the rod body 21. One end of the stud 221 is hinged to the rotating shaft 10, and the other end is screwed into the screw hole. The locking screw seat 223 is screwed onto the stud 221 and is located outside the screw hole. The locking screw seat 223 spirals towards the screw seat 222 and abuts against the screw seat 222.

[0063] In this embodiment, the outer contour of the locking screw seat 223 is a regular hexagonal structure, so that the locking screw seat 223 can be easily rotated using open-end pliers.

[0064] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A transmission module, characterized in that, It includes a pivot (10), a connecting rod (20), a drive crank arm (60), a drive cam (13), and a brake block (14); The drive crank arm (60) includes a connecting seat (61) and an extension arm (62). The connecting seat (61) is disposed on the rotating shaft (10). One end of the extension arm (62) is disposed on the connecting seat (61), and the other end extends radially away from the rotating shaft (10) as an abutment end (621). The connecting rod (20) is hinged to the connecting seat (61), and the connecting rod (20) is arranged radially along the rotating shaft (10); The drive cam (13) is rotatably disposed below the abutment end (621), and one side of the drive cam (13) is defined as the drive surface (131). One end of the drive surface (131) extends away from the rotation center of the drive cam (13) to serve as the drive end (1311). The drive surface (131) abuts against the abutment end (621). The brake block (14) is rotatably disposed above the extension arm (62), and one end of the brake block (14) is defined as the brake end (141). The brake end (141) is disposed facing the top of the extension arm (62). The drive cam (13) rotates counterclockwise and in conjunction with the extension arm (62) and the rotating shaft (10) rotate clockwise. When the drive end (1311) rotates from the lowest point to the highest point, it abuts against the abutting end (621) which rotates from the lowest point to the highest point. The top of the extension arm (62) abuts against the brake end (141) and stops rotating. The brake block (14) rotates counterclockwise, the brake end (141) acts on the top of the extension arm (62) and drives the extension arm (62) to rotate counterclockwise, the extension arm (62) drives the rotating shaft (10) to rotate counterclockwise and the drive cam (13) to rotate clockwise, until the drive end (1311) and the abutment end (621) rotate back to their respective lowest points.

2. The transmission module according to claim 1, characterized in that, It also includes a connecting arm (30) and a buffer (40); One end of the connecting arm (30) is connected to the rotating shaft (10), and the other end acts on the buffer (40); The rotating shaft (10) rotates clockwise or counterclockwise to drive the connecting rod (20) to reciprocate along its own length. When the rotating shaft (10) rotates rapidly in either clockwise or counterclockwise, the buffer (40) applies a buffering force to the rotating shaft (10) through the connecting arm (30) to facilitate the rapid rotation.

3. The transmission module according to claim 1, characterized in that, The drive crank arm (60) also includes an abutment wheel (63); The abutting wheel (63) is rotatably disposed on the abutting end (621), and the abutting end (621) acts on the driving cam (13) through the abutting wheel (63).

4. The transmission module according to claim 1, characterized in that, It also includes at least one hinge lug (50); One end of the hinge ear (50) is hinged to the connecting rod (20), and the other end is hinged to the connecting seat (61).

5. The transmission module according to claim 4, characterized in that, The number of hinge ears (50) is two, and the two hinge ears (50) are respectively located on both sides of the connecting rod (20).

6. The transmission module according to claim 2, characterized in that, It also includes a rotating wheel (70), which is rotatably disposed at one end of the connecting arm (30) away from the rotating shaft (10), and one end of the buffer (40) is connected to the rotating wheel (70).

7. The transmission module according to claim 2 or 6, characterized in that, The buffer (40) is an oil buffer.

8. The transmission module according to claim 1, characterized in that, The connecting rod (20) includes a rod body (21) and an adjusting member (22); The adjusting component (22) includes a stud (221), a screw seat (222), and a locking screw seat (223). One end of the screw seat (222) is provided with a screw hole, and the other end of the screw seat (222) is connected to the rod body (21). One end of the stud (221) is hinged to the rotating shaft (10), and the other end is screwed into the screw hole. The locking screw seat (223) is screwed onto the stud (221) and located outside the screw hole. The locking screw seat (223) spirals toward the screw seat (222) and abuts against the screw seat (222).

9. A circuit breaker, characterized in that, It includes an operating mechanism (80), a longitudinal beam (90), a pole assembly (11), and a transmission module as described in any one of claims 1-8; The longitudinal beam (90) is rotatably mounted on the operating mechanism (80), the pole post assembly (11) is mounted on the longitudinal beam (90), and the transmission module is mounted in the longitudinal beam (90) and connected to the pole post assembly (11).

Images