A drive mechanism and circuit breaker

Abstract

The application provides a driving mechanism and a circuit breaker, relates to the technical field of switches, and is used for reducing the maintenance cost of the driving mechanism. The driving mechanism comprises a first gear, a driving shaft, a second gear and a connecting rod. One end surface of the first gear is provided with one of a recess and a protrusion matched with each other, and the cross section of the recess is non-circular. The driving shaft has an acting end matched with the first gear, and the acting end is provided with the other one of the recess and the protrusion. The second gear is engaged with the first gear. One end of the connecting rod is rotationally connected with the second gear, and the other end is used for being rotationally connected with a switch of the circuit breaker. The circuit breaker comprises a base, a cover, a switch and the driving mechanism, and the driving mechanism is arranged on the base. The cover is arranged on the base, and the cover is provided with an operation hole corresponding to the driving shaft of the driving mechanism. The switch is rotationally arranged on the base. The switch is arranged on the driving end of the driving mechanism, and the driving mechanism is used for driving the switch to rotate relative to the base.

Description

Technical Field

[0001] This application relates to the field of switch technology, specifically to a drive mechanism and a circuit breaker. Background Technology

[0002] In low-voltage and small-capacity equipment, a drive mechanism is often used to drive the circuit breaker switch to rotate, thereby controlling the opening and closing operations of the circuit breaker and ensuring the safe and reliable operation of the power system.

[0003] A drive mechanism typically includes a drive shaft, gears, and connecting rods. By operating the drive shaft, the gears and connecting rods are further driven to rotate, thereby controlling the rotation of the switch.

[0004] However, the connection between the drive shaft and gear in the existing technology is relatively complex and has high maintenance costs. Utility Model Content

[0005] This application provides a drive mechanism and a circuit breaker for reducing the maintenance cost of the drive mechanism.

[0006] To achieve the above objectives, in a first aspect, this application provides a driving mechanism comprising a first gear, a drive shaft, a second gear, and a connecting rod. One end face of the first gear has one of a mating groove and a protrusion, the groove having a non-circular cross-section. The drive shaft has an operating end that meshes with the first gear, and the operating end also has one of a groove and a protrusion. The second gear meshes with the first gear. One end of the connecting rod is rotatably connected to the second gear, and the other end is rotatably connected to the switch of a circuit breaker.

[0007] When the above technical solution is adopted, one end face of the first gear is provided with one of a groove and a protrusion that cooperate with each other, and the working end is provided with the other of a groove and a protrusion.

[0008] The protrusion extends into the groove, and the drive shaft engages with the first gear. The groove has a non-circular cross-section, so that when the operator rotates the drive shaft, it can drive the first gear to rotate synchronously.

[0009] The second gear meshes with the first gear. When the first gear rotates, the meshing force can synchronously drive the second gear to rotate.

[0010] Simultaneously, one end of the connecting rod rotatably connected to the second gear can rotate around the axis of the second gear. This synchronously drives the other end of the connecting rod to rotate, thereby causing the switch to rotate and switch between the closed and open positions.

[0011] The drive shaft and the first gear are engaged by a groove and a protrusion, that is, the drive shaft and the first gear are inserted into each other.

[0012] Compared to the screw connection between the drive shaft and the first gear in existing technologies, the drive mechanism provided in this application allows for direct connection between the drive shaft and the first gear by simply inserting the protrusion into the groove during installation. No tools are required, enabling quick and convenient assembly and disassembly of the drive shaft and the first gear.

[0013] At the same time, the drive shaft and the first gear are less likely to be damaged during disassembly and assembly, which can reduce the maintenance cost of the drive mechanism.

[0014] In one possible implementation, along the circumference of the groove, the groove wall has a first arc segment, a second arc segment, a third arc segment, and a fourth arc segment connected end to end, with the first and third arc segments arranged symmetrically, and the second and fourth arc segments arranged symmetrically.

[0015] When the above technical solution is adopted, the first arc segment and the third arc segment are symmetrically arranged, and the second arc segment and the fourth arc segment are symmetrically arranged. At this time, on the one hand, when the drive shaft and the first gear are engaged, it is convenient to align and match the groove and the protrusion. The protrusion automatically centers during the process of inserting into the groove, thereby improving the efficiency of the engagement and installation of the drive shaft and the first gear.

[0016] On the other hand, after the groove and the protrusion mate, when the first gear is driven to rotate by the rotating shaft, the load can be evenly distributed in the circumferential direction of the groove, avoiding local stress concentration. At the same time, it is convenient to transfer the force driving the rotating shaft to the first gear, so as to drive the first gear to rotate.

[0017] In one possible implementation, there is an arc transition between the first and second arc segments, as well as between the first and fourth arc segments.

[0018] By adopting the above technical solution, the possibility of sudden stress changes between the first and second arc segments and between the first and fourth arc segments is reduced. Simultaneously, the contact area between the protrusion and the groove can be increased, reducing the pressure per unit area. This results in a more uniform driving force from the drive shaft on the first gear.

[0019] In one possible implementation, there is an arc transition between the third arc segment and the second arc segment, as well as between the third arc segment and the fourth arc segment.

[0020] By adopting the above technical solution, the possibility of sudden stress changes between the third and second arc segments and between the third and fourth arc segments is reduced. Simultaneously, the contact area between the protrusion and the groove can be further increased, reducing the pressure per unit area. This results in a more uniform driving force from the drive shaft on the first gear.

[0021] In one possible implementation, the end of the drive shaft away from the first gear is provided with an internal hexagonal hole; a limiting part is provided on the drive shaft along its circumference.

[0022] When adopting the above technical solution, an internal hex wrench can be used to control the rotation of the drive shaft during implementation. The internal hex socket provides a convenient manual or tool operation interface, and the contact between the hex socket and the corresponding wrench surface can transmit greater torque, facilitating control of the drive shaft rotation.

[0023] A limiting part is provided on the drive shaft, which can abut against the inner wall of the upper cover, thereby limiting the drive shaft in the axial direction of the drive shaft and preventing the drive shaft from moving along the axial direction.

[0024] In one possible implementation, the first gear is rotatably mounted on a base provided by the circuit breaker.

[0025] When the above technical solution is adopted, the base can provide stable support for the first gear, which can effectively reduce the possibility of bending deformation and radial vibration of the first gear during meshing, improve meshing accuracy, and ensure the smoothness of the transmission between the first gear and the second gear.

[0026] In one possible implementation, the actuating end is provided with a clearance groove. A through hole is formed on the first gear, the axis of which coincides with the axis of the first gear. The drive mechanism also includes a connecting shaft, which, along its axial direction, includes a first connecting section and a second connecting section connected to each other. The first connecting section is mounted on the base. The diameter of the second connecting section is smaller than the diameter of the first connecting section, and the diameter of the through hole is smaller than the diameter of the first connecting section. The first gear is rotatably sleeved outside the second connecting section, and the end of the second connecting section furthest from the first connecting section passes through the through hole and extends into the clearance groove. A limiting member is provided at the end of the second connecting section furthest from the first connecting section. The circumferential dimension of the limiting member is larger than the diameter of the through hole, used to limit the first gear axially on the connecting shaft.

[0027] When the above technical solution is adopted, the clearance groove can provide space for the end of the second connecting section away from the first connecting section and the limiting member, so as to avoid interference.

[0028] The diameter of the second connecting segment is smaller than that of the first connecting segment, so that the end where the first connecting segment connects to the second connecting segment forms a support surface. The diameter of the through hole is smaller than that of the first connecting segment, which ensures that after the first gear is rotated and fitted outside the second connecting segment, the first gear can be supported on the support surface to limit the movement of the first gear.

[0029] With the help of the limiting component and the supporting surface, the first gear can be limited in the axial direction of the connecting shaft, which can effectively reduce the possibility of bending deformation and radial vibration of the first gear during the meshing process, improve the meshing accuracy, and ensure the smoothness of the transmission between the first gear and the second gear.

[0030] In one possible implementation, a limiting screw is also provided at the end of the second connecting segment away from the first connecting segment, the limiting screw being used to limit the limiting member on the connecting shaft.

[0031] When using the above technical solution, the limiting member and the second connecting section are connected by a limiting screw, indicating that the limiting member and the connecting shaft are detachably connected. When the first gear needs to be repaired or replaced, the drive shaft can be removed first, exposing the limiting screw. Then, the limiting screw is rotated to remove the limiting member, releasing its limiting effect on the first gear. At this point, the first gear can be removed from the base for easy repair or replacement.

[0032] In one possible implementation, the first gear has a through hole, the axis of which coincides with the axis of the first gear; the drive mechanism also includes a connecting shaft and a bearing, the connecting shaft being mounted on the base. The bearing is fixedly sleeved on the outside of the connecting shaft, and the outer ring of the bearing is interference-fitted with the wall of the through hole, thereby enabling the first gear to be rotatably mounted on the base.

[0033] Secondly, this application provides a circuit breaker, including a base, a top cover, a switch, and a drive mechanism as described in any possible implementation of the first aspect. The drive mechanism is disposed on the base. The top cover is disposed on the base and has an operating hole corresponding to the drive shaft of the drive mechanism. The switch is rotatably disposed on the base. The switch is disposed at the drive end of the drive mechanism, which drives the switch to rotate relative to the base.

[0034] The beneficial effects of the circuit breaker described in the second aspect can be referred to the beneficial effects of the drive mechanism described in the first aspect, and will not be repeated here. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the circuit breaker provided in an embodiment of this application.

[0036] Figure 2 A partial cross-sectional view of the circuit breaker provided in the embodiments of this application. Figure 1 .

[0037] Figure 3 This is a partial exploded view of a circuit breaker provided in an embodiment of this application.

[0038] Figure 4 This is a partial structural diagram of the circuit breaker provided in an embodiment of this application.

[0039] Figure 5 This is a schematic diagram showing the positional relationship between the drive mechanism and the base provided in an embodiment of this application.

[0040] Figure 6 A schematic diagram of the first gear provided in an embodiment of this application.

[0041] Figure 7 This is a schematic diagram of the drive shaft provided in an embodiment of this application.

[0042] Figure 8 This is a cross-sectional schematic diagram of the drive shaft provided in an embodiment of this application.

[0043] Figure 9 This is a bottom view of the drive shaft provided in an embodiment of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 11-First gear, 111-Groove, 1111-First arc segment, 1112-Second arc segment, 1113-Third arc segment

[0046] 1114 - Fourth arc segment, 112 - Through hole, 12 - Drive shaft, 121 - Protrusion, 122 - Internal hexagonal hole, 123 - Limiting part.

[0047] 124-Allowing groove, 13-Second gear, 14-Connecting rod, 15-Connecting shaft, 16-Limiting component, 17-Limiting screw.

[0048] 2-Base, 3-Top cover, 31-Operating hole, 4-Switch. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] 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 application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0051] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application 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 application.

[0053] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0054] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0055] In the prior art, the drive shaft 12 and gear in the drive mechanism are often connected together by screws. During disassembly and assembly, the screws need to be rotated first, and then the drive shaft 12 and gear need to be disassembled and assembled.

[0056] This not only makes the operation more cumbersome, but also makes it easy for the threads to strip when the drive shaft 12 and gear are frequently disassembled and reassembled, which may require the replacement of screws, drive shaft 12 or gear, thus increasing the maintenance cost of the drive mechanism.

[0057] In view of the technical problems existing in the prior art, firstly, as Figures 1 to 3 As shown in the figure, this application embodiment provides a circuit breaker, which includes a base 2, a top cover 3, a switch 4, and a drive mechanism, with the drive mechanism disposed on the base 2.

[0058] The top cover 3 is mounted on the base 2. The top cover 3 can be mounted on the base 2 by welding, snap-fitting, or other methods. Of course, the top cover 3 can also be mounted on the base 2 using screws. The method of mounting the top cover 3 on the base 2 is not specifically limited here and depends on the actual situation.

[0059] The upper cover 3 is mounted on the base 2, and the upper cover 3 and the base 2 can form a receiving cavity. In fact, the drive mechanism can be located inside the receiving cavity.

[0060] The top cover 3 and the base 2 can accommodate the drive mechanism, providing a stable space for the drive mechanism and ensuring that the drive mechanism can work normally without external interference.

[0061] Meanwhile, the base 2 can provide positioning and support for the drive mechanism, preventing displacement or damage during operation. The top cover 3 and the base 2 can also withstand a certain amount of external pressure, protecting the drive mechanism from damage.

[0062] In addition, the top cover 3 and the base 2 have protective functions, which can prevent moisture, dust, dirt and other impurities from the outside of the cavity from entering the interior of the top cover 3 and the base 2, thereby avoiding corrosion or damage to the drive mechanism and other components installed on the base 2.

[0063] In practice, the base 2 and the top cover 3 can be made of plastic. Of course, this is not a limitation and the actual situation shall prevail. The structure of the base 2 is not specifically limited here.

[0064] The upper cover 3 has an operation hole 31 corresponding to the drive shaft 12 of the drive mechanism, so that the operator can operate the drive shaft 12.

[0065] The circuit breaker also includes switch 4, such as Figure 4 As shown, switch 4 is rotatably mounted on base 2, and switch 4 has a closed position and an open position relative to base 2. When switch 4 rotates relative to base 2, it can switch between the closed position and the open position.

[0066] When switch 4 is in the closed position, the circuit breaker is in the closed state, and the circuit containing the circuit breaker operates normally. When switch 4 is in the open position, the circuit breaker is in the open state, and the circuit containing the circuit breaker is disconnected.

[0067] Switch 4 is located at the drive end of the drive mechanism, which drives switch 4 to rotate relative to base 2, thereby switching switch 4 between closed and open positions.

[0068] In the embodiments provided in this application, please refer to Figure 2 and Figure 5As shown, the drive mechanism includes a first gear 11, a drive shaft 12, a second gear 13, and a connecting rod 14. One end face of the first gear 11 is provided with one of a groove 111 and a protrusion 121 that cooperate with each other. The cross-section of the groove 111 is non-circular.

[0069] The detailed parameters of the first gear 11 and the second gear 13 are not specifically limited here, and shall be subject to the actual situation.

[0070] One end face of the first gear 11 refers to the face on the direction of the extension of the axis of the first gear 11.

[0071] In specific implementation, a groove 111 can be provided on one end face of the first gear 11, or a protrusion 121 can be provided on one end face of the first gear 11.

[0072] It should be noted that the cross-section of the groove 111 refers to the cross-section formed by cutting the groove 111 along a plane perpendicular to the direction of extension of the axis of the first gear 11.

[0073] The cross-section of groove 111 is non-circular, meaning that the cross-section of groove 111 can be any shape other than a circle.

[0074] For example, the cross-section of the groove 111 can be elliptical, irregular curved, polygonal, star-shaped, etc.

[0075] The external shape of the protrusion 121 matches the groove 111. Please combine... Figure 6 and Figure 9 As shown.

[0076] For example, when the groove 111 is elliptical, the outer shape of the groove 111 is also elliptical.

[0077] The drive shaft 12 has a working end that cooperates with the first gear 11, and the working end is provided with either a groove 111 or a protrusion 121. When the groove 111 is provided on one end face of the first gear 11, as... Figure 6 As shown, the working end is provided with a protrusion 121, such as Figure 7 and Figure 9 As shown. When a protrusion 121 is provided on one end face of the first gear 11, a groove 111 is provided on the working end.

[0078] The protrusion 121 extends into the groove 111, and the drive shaft 12 engages with the first gear 11. The cross-section of the groove 111 is non-circular, so that when the operator rotates the drive shaft 12, it can drive the first gear 11 to rotate synchronously.

[0079] The second gear 13 meshes with the first gear 11. When the first gear 11 rotates, it can synchronously drive the second gear 13 to rotate under the action of meshing force.

[0080] One end of the connecting rod 14 is rotatably connected to the second gear 13, and the other end is rotatably connected to the switch 4 of the circuit breaker.

[0081] It should be noted that one end of the connecting rod 14 is rotatably connected to the outer circumference of the second gear 13, so that when the second gear 13 rotates, the end of the connecting rod 14 connected to the second gear 13 can rotate relative to the axis of the second gear 13.

[0082] Thus, when the operator rotates the drive shaft 12, it drives the first gear 11 to rotate synchronously. Furthermore, under the meshing force, it drives the second gear 13 to rotate. Simultaneously, one end of the connecting rod 14, rotatably connected to the second gear 13, can rotate around the axis of the second gear 13. This synchronously drives the other end of the connecting rod 14 to rotate, thereby driving the switch 4 to rotate, allowing the switch 4 to switch between the closed and open positions.

[0083] In addition to the above, in the embodiments provided in this application, the drive shaft 12 and the first gear 11 are engaged by a groove 111 and a protrusion 121, that is, the drive shaft 12 and the first gear 11 are inserted into each other.

[0084] Compared to the prior art where the drive shaft 12 and the first gear 11 are connected by screws, the drive mechanism provided in this application embodiment allows for direct connection between the drive shaft 12 and the first gear 11 by inserting the protrusion 121 into the groove 111 during installation. No tools are required, allowing for quick and convenient assembly and disassembly of the drive shaft 12 and the first gear 11.

[0085] Meanwhile, during the disassembly and assembly of the drive shaft 12 and the first gear 11, damage to the drive shaft 12 and the first gear 11 is less likely. This can reduce the maintenance cost of the drive mechanism.

[0086] In one possible implementation, such as Figure 6 As shown, along the circumference of the groove 111, the groove wall of the groove 111 has a first arc segment 1111, a second arc segment 1112, a third arc segment 1113 and a fourth arc segment 1114 connected end to end. The first arc segment 1111 and the third arc segment 1113 are symmetrically arranged, and the second arc segment 1112 and the fourth arc segment 1114 are symmetrically arranged.

[0087] The first arc segment 1111 and the third arc segment 1113 are symmetrically arranged, and the second arc segment 1112 and the fourth arc segment 1114 are symmetrically arranged. At this time, on the one hand, when the drive shaft 12 and the first gear 11 are engaged, it is convenient to align and match the groove 111 and the protrusion 121. The protrusion 121 automatically centers during the process of inserting into the groove 111, thereby improving the efficiency of the engagement and installation of the drive shaft 12 and the first gear 11.

[0088] On the other hand, after the groove 111 and the protrusion 121 are engaged, when the first gear 11 is driven to rotate by the rotating shaft, the load can be evenly distributed in the circumferential direction of the groove 111, avoiding local stress concentration. At the same time, it is convenient to transfer the force of driving the rotating shaft to the first gear 11 to drive the first gear 11 to rotate.

[0089] In practice, the first arc segment 1111 and the third arc segment 1113 can be partial arc segments cut from the same circle. The second arc segment 1112 and the fourth arc segment 1114 can also be partial arc segments cut from the same circle.

[0090] In the embodiments provided in this application, the radius of the first arc segment 1111 may be smaller than the radius of the third arc segment 1113. Of course, the radii of the first arc segment 1111 and the third arc segment 1113 are not specifically limited here, but are subject to the actual situation.

[0091] It should be pointed out that, in combination Figure 6 , Figure 7 and Figure 9 As shown, when the groove wall of the groove 111 has a first arc segment 1111, a second arc segment 1112, a third arc segment 1113 and a fourth arc segment 1114 connected end to end, the outer wall of the protrusion 121 also has a first arc segment 1111, a second arc segment 1112, a third arc segment 1113 and a fourth arc segment 1114 connected end to end.

[0092] Additionally, it can be understood that the first arc segment 1111, the second arc segment 1112, the third arc segment 1113, and the fourth arc segment 1114 being connected end to end in sequence means that the two ends of the first arc segment 1111 are connected to one end of the second arc segment 1112 and one end of the fourth arc segment 1114, respectively, and the two ends of the third arc segment 1113 are connected to the other end of the second arc segment 1112 and the other end of the fourth arc segment 1114, respectively.

[0093] In some embodiments, there is an arc transition between the first arc segment 1111 and the second arc segment 1112, and between the first arc segment 1111 and the fourth arc segment 1114.

[0094] At this time, the possibility of stress abrupt changes between the first arc segment 1111 and the second arc segment 1112, and between the first arc segment 1111 and the fourth arc segment 1114, is reduced. At the same time, the contact area between the protrusion 121 and the groove 111 can be increased, reducing the pressure per unit area. This makes the driving force from the drive shaft 12 on the first gear 11 more uniform.

[0095] In one possible implementation, there is an arc transition between the third arc segment 1113 and the second arc segment 1112, and between the third arc segment 1113 and the fourth arc segment 1114.

[0096] At this point, the possibility of stress abrupt changes between the third arc segment 1113 and the second arc segment 1112, and between the third arc segment 1113 and the fourth arc segment 1114, is reduced. Simultaneously, the contact area between the protrusion 121 and the groove 111 can be further increased, reducing the pressure per unit area. This results in a more uniform driving force from the drive shaft 12 on the first gear 11.

[0097] In actual operation, the operator can manually rotate the drive shaft 12, or use a tool to rotate the drive shaft 12.

[0098] To facilitate operation and save manpower, as an optional method, the end of the drive shaft 12 away from the first gear 11 is provided with an internal hexagonal hole 122.

[0099] In practice, an internal hex wrench can be used to control the rotation of the drive shaft 12. The internal hex hole 122 provides a convenient manual or tool operation interface, and the contact between the hex hole and the corresponding wrench surface can transmit greater torque, making it easier to control the rotation of the drive shaft 12.

[0100] The cross-sectional dimensions and depth of the internal hexagonal hole 122 are not specifically limited here, and should be based on the actual situation.

[0101] The operator can insert an Allen wrench into the Allen socket 122 and rotate the wrench, thereby driving the drive shaft 12 to rotate, which in turn drives the first gear 11, the second gear 13, and the connecting rod 14 to rotate. Rotating the Allen wrench counterclockwise or clockwise can control the switch 4 to switch between the closed and open positions.

[0102] In one example, such as Figures 7 to 9 As shown, a limiting part 123 is provided on the drive shaft 12 along the circumference.

[0103] Thus, combined Figure 2 , Figure 3 and Figure 7 As shown, in a specific implementation, the diameter of the operating hole 31 can be larger than the diameter of the internal hexagonal hole 122, while the diameter of the operating hole 31 is smaller than the diameter of the limiting part 123.

[0104] In this case, the operator can directly operate the drive shaft 12 from outside the top cover 3. In addition, after the top cover 3 is installed on the base 2, the limiting part 123 can abut against the inner wall of the top cover 3, thereby limiting the drive shaft 12 in the axial direction of the drive shaft 12 and preventing the drive shaft 12 from moving along the axial direction.

[0105] In practice, the limiting part 123 has a ring-shaped structure. The limiting part 123 can be set separately from the drive shaft 12, and during installation, the limiting part 123 can be installed on the drive shaft 12 by welding, threaded connection or other methods.

[0106] Of course, the limiting part 123 can also be integrally formed with the drive shaft 12, that is, the limiting part 123 is formed at the same time as the drive shaft 12 is formed.

[0107] As a possible approach, the first gear 11 is rotatably mounted on the base 2 of the circuit breaker.

[0108] The base 2 can provide stable support for the first gear 11, which can effectively reduce the possibility of bending deformation and radial vibration of the first gear 11 during the meshing process, improve meshing accuracy, and ensure the smooth transmission of the first gear 11 and the second gear 13.

[0109] In one example, such as Figures 7 to 9 The working end is provided with a clearance groove 124. A through hole 112 is provided on the first gear 11, the axis of which coincides with the axis of the first gear 11. Figure 6 As shown.

[0110] The driving mechanism provided in this embodiment further includes a connecting shaft 15, as shown in the reference. Figure 2 and Figure 5 As shown, along the axial direction of the connecting shaft 15, the connecting shaft 15 includes a first connecting section and a second connecting section connected to each other, and the first connecting section is used to be disposed on the base 2.

[0111] The first and second connecting segments can be connected by welding, snap-fitting, or bonding. Alternatively, they can be machined as a single piece. This is merely an example and not a specific limitation.

[0112] The first connecting segment can be welded to the base 2, or it can be threaded to the base 2. The connection method between the first connecting segment and the base 2 is not specifically limited here and depends on the actual situation.

[0113] The diameter of the second connecting segment is smaller than that of the first connecting segment, and the diameter of the through hole 112 is smaller than that of the first connecting segment. The first gear 11 is rotatably sleeved outside the second connecting segment, and the end of the second connecting segment away from the first connecting segment passes through the through hole 112 and extends into the relief groove 124.

[0114] The diameter of the second connecting segment is smaller than that of the first connecting segment, so that the end where the first connecting segment connects to the second connecting segment forms a support surface. The diameter of the through hole 112 is smaller than that of the first connecting segment, which ensures that after the first gear 11 is rotated and sleeved outside the second connecting segment, the first gear 11 can be supported on the support surface to limit the movement of the first gear 11.

[0115] A limiting member 16 is provided at the end of the second connecting section away from the first connecting section. The circumferential dimension of the limiting member 16 is larger than the diameter of the through hole 112, and it is used to limit the first gear 11 in the axial direction of the connecting shaft 15.

[0116] The clearance groove 124 can provide space for the end of the second connecting segment away from the first connecting segment and the limiting member 16 to avoid interference.

[0117] Of course, the circumferential dimension of the limiting member 16 is smaller than the dimension of the clearance groove 124 so that the clearance groove 124 can accommodate the limiting member 16.

[0118] Under the action of the limiting member 16 and the supporting surface, the first gear 11 can be limited in the axial direction of the connecting shaft 15, which can effectively reduce the possibility of bending deformation and radial vibration of the first gear 11 during the meshing process, improve the meshing accuracy, and ensure the smooth transmission of the first gear 11 and the second gear 13.

[0119] The specific dimensions of the connecting shaft 15, the clearance groove 124, and the limiting member 16 are not specifically limited here, and shall be subject to the actual situation. The specific structure of the limiting member 16 is also not specifically limited here.

[0120] In practice, the limiting component 16 can be welded or riveted to the connecting shaft 15. Of course, this is just an example and is not intended as a specific limitation.

[0121] In some embodiments, a limiting screw 17 is also provided at the end of the second connecting segment away from the first connecting segment, the limiting screw 17 being used to limit the limiting member 16 on the connecting shaft 15.

[0122] In practice, a central hole can be provided on the limiting member 16, and a threaded hole that mates with the limiting screw 17 can be opened on the second connecting section.

[0123] The screw of the limiting screw 17 passes through the central hole and is threaded into the second connecting section, thereby setting the limiting member 16 on the connecting shaft 15.

[0124] The limiting component 16 can be a limiting washer, but it is not limited to this in practice.

[0125] The limiting member 16 and the second connecting section are connected by a limiting screw 17, indicating that the limiting member 16 and the connecting shaft 15 are detachably connected. When the first gear 11 needs to be repaired or replaced, the drive shaft 12 can be removed first, exposing the limiting screw 17. Then, the limiting screw 17 is rotated to remove the limiting member 16, releasing its limiting effect on the first gear 11. At this time, the first gear 11 can be removed from the base 2 for repair or replacement.

[0126] In another example, the first gear 11 has a through hole 112, and the axis of the through hole 112 coincides with the axis of the first gear 11.

[0127] The drive mechanism provided in this embodiment further includes a connecting shaft 15 and a bearing. The connecting shaft 15 is disposed on the base 2. The bearing is fixedly sleeved on the outside of the connecting shaft 15, and the outer ring of the bearing is interference-fitted with the wall of the through hole 112, thereby realizing the function of rotating the first gear 11 on the base 2.

[0128] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A driving mechanism, characterized in that, include: The first gear has one end face provided with a groove and a protrusion that cooperate with each other, and the cross-section of the groove is non-circular. A drive shaft has an operating end that engages with the first gear; the operating end is provided with the other of the groove and the protrusion. The second gear meshes with the first gear; The connecting rod has one end rotatably connected to the second gear and the other end rotatably connected to the switch of the circuit breaker.

2. The driving mechanism according to claim 1, characterized in that, Along the circumference of the groove, the groove wall has a first arc segment, a second arc segment, a third arc segment and a fourth arc segment connected end to end, the first arc segment and the third arc segment are symmetrically arranged, and the second arc segment and the fourth arc segment are symmetrically arranged.

3. The driving mechanism according to claim 2, characterized in that, There is an arc transition between the first arc segment and the second arc segment, and between the first arc segment and the fourth arc segment.

4. The driving mechanism according to claim 2, characterized in that, The third arc segment and the second arc segment, as well as the third arc segment and the fourth arc segment, form an arc transition.

5. The driving mechanism according to claim 1, characterized in that, The drive shaft has an internal hexagonal hole at the end away from the first gear; a limiting part is provided on the drive shaft along its circumference.

6. The driving mechanism according to claim 1, characterized in that, The first gear is rotatably mounted on the base of the circuit breaker.

7. The driving mechanism according to claim 6, characterized in that, The working end is provided with a clearance groove; the first gear is provided with a through hole, and the axis of the through hole coincides with the axis of the first gear; The drive mechanism further includes a connecting shaft. Along the axial direction of the connecting shaft, the connecting shaft includes a first connecting segment and a second connecting segment connected to each other. The first connecting segment is used to be disposed on the base. The diameter of the second connecting segment is smaller than the diameter of the first connecting segment. Furthermore, the diameter of the through hole is smaller than the diameter of the first connecting segment. The first gear is rotatably sleeved outside the second connecting section; the end of the second connecting section away from the first connecting section passes through the through hole and extends into the clearance groove; A limiting member is provided at the end of the second connecting segment away from the first connecting segment. The circumferential dimension of the limiting member is larger than the diameter of the through hole, and the limiting member is used to limit the first gear in the axial direction of the connecting shaft.

8. The driving mechanism according to claim 7, characterized in that, The end of the second connecting segment away from the first connecting segment is also provided with a limiting screw, which is used to limit the limiting member on the connecting shaft.

9. The driving mechanism according to claim 6, characterized in that, The first gear has a through hole, the axis of which coincides with the axis of the first gear; the driving mechanism further includes: A connecting shaft is disposed on the base; The bearing is fixedly sleeved outside the connecting shaft; the outer ring of the bearing is interference-fitted with the wall of the through hole.

10. A circuit breaker, characterized in that, include: The drive mechanism as described in any one of claims 1 to 9; The base, wherein the driving mechanism is disposed on the base; An upper cover is disposed on the base; the upper cover has an operating hole corresponding to the drive shaft of the drive mechanism; A switch is rotatably mounted on the base; the switch is mounted on the drive end of the drive mechanism, which is used to drive the switch to rotate relative to the base.

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