Counting device applied to circuit breaker

Abstract

The utility model relates to a counting device applied to a circuit breaker, which comprises a shell, a support and a counting assembly, the support and the counting assembly are arranged in the shell, the shell is provided with an accommodating cavity and a slot, the support is arranged in the accommodating cavity, the counting assembly comprises a counting wheel set, a counting shaft, a carry wheel set, a carry wheel shaft and a torsion spring, and the torsion spring is arranged in the accommodating cavity. The support is provided with an installation cavity and a fixing shaft integrally arranged in the installation cavity, a notch is formed in one side of the installation cavity, the end of the carry wheel shaft is installed on the support, the carry wheel set comprises a plurality of carry wheels, the counting shaft is arranged in the axial direction of the support and rotates relative to the support, and the first end of the counting shaft extends out of the shell. According to the technical scheme, the counting device applied to the circuit breaker is compact in structure, accurate in counting, capable of being used in a small space, diversified in operation direction, capable of being used in the left-right direction and the up-down direction, and capable of meeting different use requirements.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a counting device used in circuit breakers. Background Technology

[0002] Circuit breakers are widely used electrical devices. Besides protecting circuits, they are also commonly used as switches. Therefore, in practical use, circuit breakers frequently connect and disconnect current in normal circuits. However, most ordinary circuit breakers on the market do not have a counting function for the number of times they have been connected and disconnected, so their performance depends on the user's subjective impression. When used for a long time, users often cannot determine the condition and lifespan of the circuit breaker. Since circuit breakers have a limited lifespan, failure to replace them in a timely manner can affect daily life and the use of related electrical products.

[0003] Existing technologies also include circuit breakers with counting functions, all of which use mechanical counters linked to the circuit breaker's operating mechanism to detect the number of closing and opening cycles. However, existing counting structures are relatively complex, causing operational inconvenience, and the connection between the circuit breaker and the counter has poor stability, easily detaching and preventing subsequent counting functions from being implemented. Summary of the Invention

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a counting device for use on circuit breakers. It has a compact structure, achieves accurate counting, is suitable for use in small spaces, and has a robust and stable structure between the swing arm, the circuit breaker, and the counting shaft.

[0005] The technical solution of this utility model: A counting device used in a circuit breaker includes a housing, a bracket disposed within the housing, and a counting assembly. The housing has a receiving cavity and a slot. The bracket is installed within the receiving cavity. The slot communicates with the receiving cavity and has a transparent cover plate installed within it. The counting assembly includes a counting wheel set, a counting shaft, a carry wheel set, a carry wheel shaft, and a torsion spring. The bracket is cylindrical and has a mounting cavity and a fixed shaft integrally disposed within the mounting cavity. A slot is formed on one side of the mounting cavity. The end of the carry wheel shaft is mounted on the bracket and is positioned opposite to the fixed shaft. The counting wheel set is sleeved on the outer periphery of the bracket. The carry wheel assembly is sleeved on the carry wheel shaft, and part of the carry wheel assembly is exposed outside the mounting cavity from the slot. The counting shaft is arranged along the axial direction of the bracket and rotates relative to the bracket. The first end of the counting shaft extends to the outside of the outer shell and is connected to a swing arm at the end. The second end of the counting shaft is provided with a drive component that rotates synchronously with it. The swing arm includes a fixed end and a swing end. The fixed end has a first connecting hole and the swing end has a second connecting hole. The end of the first end of the counting shaft is knurled and located in the first connecting hole, and is riveted to the fixed end. The torsion spring is sleeved on the counting shaft, and one end is sleeved on the fixed shaft to automatically reset the counting shaft after it rotates.

[0006] Using the above technical solution, when the circuit breaker opens or closes, it drives the swing arm to swing, which in turn drives the counting shaft to rotate. At the same time, it causes the torsion spring to deform. After the counting shaft is released, the torsion spring resets, causing the counting shaft to reset as well. Each rotation of the counting shaft counts once. The counting device has a compact overall structure and small size, making it suitable for small spaces. It also offers multiple operating directions to meet different usage needs. The structure between the counting shaft and the swing arm is robust, and the second connecting hole on the swing end is connected and fixed to other structures on the circuit breaker. The counting function is achieved by driving the swing arm to swing when the circuit breaker opens or closes, thereby driving the counting shaft to rotate. A transparent cover plate is installed at the slot, allowing the counting status to be viewed through the transparent cover plate.

[0007] A further feature of this invention is that a third connecting hole, identical to the first connecting hole, is provided on the fixed end, and a fastener is inserted into the third connecting hole, with the end of the fastener abutting against the first end of the counting shaft.

[0008] With the above-mentioned further configuration, the connection between the counting shaft and the swing arm is further fixed by fasteners, making the structure more robust. The swing arm swings when the circuit breaker is opened and closed, thereby driving the counting shaft to rotate and achieve counting, making the counting more accurate.

[0009] A further feature of this invention is that the second end of the counting shaft is also provided with a knurled structure, and the driving component is sleeved on the knurled part of the counting shaft and riveted to the counting shaft.

[0010] By adopting the above-mentioned further settings, the structure between the counting shaft and the driving component is made more robust, achieving synchronous rotation.

[0011] A further refinement of this invention: the counting wheel group includes multiple counting wheels sequentially rotated and sleeved on the outer periphery of the support from right to left. The counting wheel at the rightmost end is the lowest-position counting wheel, the counting wheel at the leftmost end is the highest-position counting wheel, and the counting wheel between the lowest-position and highest-position counting wheels is the middle counting wheel. The carry wheel group includes multiple carry wheels, each carried wheel sleeved on a carry wheel shaft and cooperating with the middle and highest-position counting wheels. Each counting wheel has a carry tooth on its left side surface to drive the carry wheel to rotate. The outer periphery of each counting wheel is evenly distributed with ten digits from 0 to 9. The carry tooth is located between the digits 0 and 9. The driving component cooperates with the first counting wheel to drive the counting wheel to rotate.

[0012] With the above-mentioned further configuration, the counting shaft drives the lowest-order counting wheel to rotate. As the lowest-order counting wheel counts sequentially from zero to nine, when a carry-over is needed, the carry-over protrusion engages with the carry-over wheel, driving the carry-over wheel to rotate and causing the counting wheel at the tens digit to rotate, thus realizing the carry-over. At the same time, the carry-over protrusion separates from the carry-over wheel, and the lowest-order counting wheel counts again sequentially, and so on. During installation, the carry-over wheel shaft can be installed on the bracket first, and then the highest-order counting wheel, carry-over wheel, intermediate counting wheel, carry-over wheel, lowest-order counting wheel, and torsion spring can be installed in sequence. Then the counting shaft can be installed to form a whole, and the whole can be installed into the receiving cavity of the outer shell.

[0013] A further feature of this invention is that a positioning disc is provided inside the outer casing. The positioning disc is located between the bracket and the driving component, and the positioning disc is connected to the bracket. One end of the feed wheel shaft is fixed to the bracket, and the other end is fixed to the positioning disc.

[0014] By employing the above-mentioned further design, the components within the bracket are positioned to ensure structural stability of each component and prevent any impact on the counting function.

[0015] A further feature of this invention is that the driving component is arranged in a disc shape, and the driving component is symmetrically provided with driving pawls. The inner sidewall of the lowest position counting wheel is provided with several ratchet teeth along its circumference. When the driving component rotates, the driving pawls and ratchet teeth cooperate to drive the lowest position counting wheel to rotate. The positioning disc is provided with positioning pawls.

[0016] With the above-mentioned further configuration, the counting shaft drives the drive component to rotate, and the drive pawl and ratchet engage to drive the lowest counting wheel to rotate for counting. The positioning pawl ensures that the counting wheel can only rotate in one direction, avoiding counting errors.

[0017] A further feature of this invention is that the positioning disk is symmetrically provided with two arc-shaped limiting grooves, and the driving component is provided with corresponding limiting blocks. The limiting blocks are located in the limiting grooves, and when the counting shaft rotates, the limiting blocks slide relative to the limiting grooves.

[0018] By further configuring the above settings, the rotation angle of the counting shaft can be limited, so that each rotation of the counting shaft drives the lowest counting wheel to count once.

[0019] A further improvement of this invention is as follows: the mounting cavity is integrally provided with two symmetrically arranged connecting shafts, the inner sidewalls of the two connecting shafts are threaded, the positioning plate is provided with connecting posts with openings at both ends, the two connecting posts are inserted into the corresponding connecting shafts and fixed by screws.

[0020] With the above-mentioned further configuration, the positioning plate and the bracket are connected by screws, the positioning plate is fixedly set, and the two ends of the feed wheel shaft are located on the bracket and the positioning plate, so that its structure is stable and the rotation of the feed wheel will not affect other adjacent feed wheels.

[0021] A further improvement of this invention is as follows: each carry wheel is provided with a plurality of long teeth and short teeth arranged in an alternating manner, each long tooth and short tooth being arranged along the axial direction of the carry wheel; the inner sidewalls of the middle counting wheel and the highest counting wheel are provided with tooth grooves that cooperate with the long teeth and short teeth; the carry protrusion is provided with a carry groove that cooperates with the long teeth; and the end face of the long teeth is arranged in an arc shape.

[0022] With the above-mentioned further configuration, when the count reaches nine and a carry-over is required, the carry-over protrusion rotates to the carry-over wheel. The carry-over protrusion pushes the short teeth, and the long teeth enter the carry-over slot. When the counting wheel rotates, it drives the carry-over wheel to rotate. The carry-over wheel drives the counting wheel that it is paired with to rotate, thus realizing the carry-over. After the carry-over, the long teeth disengage from the carry-over slot. The end face of the long teeth is arc-shaped to facilitate its entry and exit from the carry-over slot.

[0023] A further feature of this invention is that it includes an end cap, which is placed over the end of the accommodating cavity and sleeved on the second end of the counting shaft.

[0024] The above-mentioned further design facilitates the installation of the internal structure of the housing. After installation, the end cap is then sealed with plastic to seal the accommodating cavity, preventing foreign objects from entering the accommodating cavity and affecting the operation of the counting component. At the same time, it makes the structure more stable when the counting shaft rotates. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model;

[0026] Figure 2 This is an exploded view of a specific embodiment of the present utility model;

[0027] Figure 3 This is a cross-sectional view of a specific embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram showing the connection between the counting shaft and the swing arm in a specific embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the counting shaft in a specific embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the bracket according to a specific embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the swing arm in a specific embodiment of the present utility model;

[0032] Figure 8 This is a schematic diagram of the outer shell of a specific embodiment of the present utility model;

[0033] Figure 9 This is a schematic diagram of the driving component and the lowest bit counting wheel in a specific embodiment of this utility model;

[0034] Figure 10 This is a schematic diagram of the leftmost side of the bracket in a specific embodiment of this utility model;

[0035] Figure 11 This is a schematic diagram of the installation of the counting shaft and the driving component according to a specific embodiment of this utility model;

[0036] Figure 12 This is an exploded view of the counting wheel assembly according to a specific embodiment of the present invention;

[0037] Figure 13 This is a schematic diagram of the carry wheel in a specific embodiment of the present invention;

[0038] Figure 14 This is a schematic diagram of the positioning disc in a specific embodiment of the present utility model.

[0039] In the diagram, 1. Outer shell; 11. Receiving cavity; 111. Shaft; 12. Slot; 121. Transparent cover; 13. Extension plate; 131. Opening; 2. Bracket; 21. Fixing hole; 22. Mounting cavity; 221. Groove; 222. Connecting shaft; 23. Fixing shaft; 24. Baffle; 3. Counting assembly; 31. Counting wheel group; 311. Lowest position counting wheel; 3111. Ratchet; 312. Highest position counting wheel; 313. Intermediate counting wheel; 314. Carrying tooth; 3141. Carrying groove; 315. Gear groove; 32. Counting shaft; 321. First end; 322. Second end; 33. Carrying wheel group; 33 1. Carry wheel; 332. Long tooth; 333. Short tooth; 34. Carry wheel shaft; 35. Torsion spring; 4. Swing arm; 41. Fixed end; 411. First connecting hole; 412. Third connecting hole; 42. Swing end; 421. Second connecting hole; 5. Driving component; 51. Limiting block; 52. Driving pawl; 6. Positioning plate; 7. End cap; 8. Positioning disc; 81. Limiting groove; 82. Connecting post; 83. Positioning ratchet; 9. Fastener. Detailed Implementation

[0040] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] It should be noted that all directional indicators (such as up, down, forward, backward, etc.) in the description of this utility model are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0044] like Figure 1-14As shown, a counting device used in a circuit breaker includes a housing 1, a bracket 2 disposed within the housing 1, and a counting assembly 3. The housing 1 has a receiving cavity 11 and a slot 12. The bracket 2 is installed in the receiving cavity 11. The slot 12 communicates with the receiving cavity 11, and a transparent cover plate 121 is installed in the slot 12. A positioning boss is provided in the slot 12, and the transparent cover plate rests on the positioning boss. The counting assembly 3 includes a counting wheel set 31, a counting shaft 32, an advance wheel set 33, an advance wheel shaft 34, and a torsion spring 35. The bracket 2 is cylindrical, and two fixing holes 21 are provided at the leftmost end of the bracket 2. Two shafts 111 are correspondingly provided in the receiving cavity 11. The bracket 2 is installed in the receiving cavity 11. When placed in cavity 11, shaft 111 is inserted into the corresponding fixing hole 21 for installation and positioning, making installation more convenient. Furthermore, the fixing hole 21 is located on bracket 2, eliminating the need for sealing and simplifying installation. Bracket 2 has an installation cavity 22 and a fixing shaft 23 integrally formed within the installation cavity 22. A slot 221 is formed on one side of the installation cavity 22. The end of the feed wheel shaft 34 is mounted on bracket 2 and is positioned opposite to the fixing shaft 23. The counting wheel set 31 is sleeved on the outer circumference of bracket 2, and the feed wheel set 33 is sleeved on the feed wheel shaft 34, with a portion protruding from the slot 221 outside the installation cavity 22. The counting shaft 32 is arranged along the axial direction of bracket 2 and rotates relative to bracket 2. The first end 321 of the counting axis extends outside the outer casing 1 and is connected to a swing arm 4. The second end 322 of the counting axis is provided with a driving component 5 that rotates synchronously with it. The swing arm 4 includes a fixed end 41 and a swing end 42. The fixed end 41 has a first connecting hole 411, and the swing end 42 has a second connecting hole 421. The end of the first end of the counting axis 32 is knurled and located in the first connecting hole 411, and is riveted and fixed to the fixed end 41, making the structure between the counting axis 32 and the swing arm 4 solid. The second connecting hole 421 on the swing end 42 is connected and fixed to other structures on the circuit breaker so that the swing arm 4 is driven to swing when the circuit breaker opens and closes, thereby driving the counting axis 32 to rotate. The counting function is implemented. The second end of the counting shaft 32 is also provided with a knurled structure. The driving component 5 is sleeved on the knurled part of the counting shaft 32 and riveted to the counting shaft 32, so that the structure between the counting shaft 32 and the driving component 5 is firm and synchronous rotation is achieved. The fixed end 41 is also provided with a third connecting hole 412 that is the same as the first connecting hole 411. A fastener 9 is inserted in the third connecting hole 412. The end of the fastener 9 abuts against the first end of the counting shaft 32. The connection between the counting shaft 32 and the swing arm 4 is further fixed by the fastener 9, making the structure more robust. The swing arm 4 swings when the circuit breaker is opened and closed, thereby driving the counting shaft 32 to rotate and achieve counting, making the counting more accurate.

[0045] The counting wheel group 31 includes multiple counting wheels that are sequentially rotated and sleeved around the outer periphery of the bracket 2 from right to left. The counting wheel at the rightmost end is the lowest position counting wheel 311, the counting wheel at the leftmost end is the highest position counting wheel 312, and the middle counting wheel 313 is located between the lowest position counting wheel 311 and the highest position counting wheel 312. The carry wheel group 33 includes multiple carry wheels 331, each carry wheel 331 is sleeved on the carry wheel shaft 34, and each carry wheel 331 partially protrudes from the slot 221 outside the mounting cavity 22 and cooperates with the middle counting wheel 313 and the highest position counting wheel 312. The left side of each counting wheel is provided with a carry tooth 314 to drive the carry wheel 331 to rotate. The left side of the counting wheel is provided with an extension edge along its circumference. 14 is located on the extension edge. The leftmost end of the bracket 2 is integrally provided with a baffle 24. The extension edge of the leftmost counting wheel is sleeved on the outer ring of the baffle 24. The ten digits 0 to 9 are evenly distributed on the outer circumference of each counting wheel. The carry protrusion 314 is located between the digits 0 and 9. The driving component 5 cooperates with the first counting wheel to drive the counting wheel to rotate. The torsion spring 35 is sleeved on the counting shaft 32, and one end is sleeved on the fixed shaft 23 so that the counting shaft 32 can be automatically reset after the counting shaft 32 rotates. A positioning plate 6 is integrally formed between the fixed shaft 23 and the inner wall of the mounting cavity 22. The torsion spring 35 abuts against the positioning plate 6 to position the torsion spring 35, making its structure stable and better resetting the counting shaft 32. It also includes an end cover 7. End cap 7 is placed at the end of the receiving cavity 11 and sleeved on the second end of the counting shaft 32 to facilitate the internal structural installation of the outer casing 1. After installation, end cap 7 is then plastic-sealed with the outer casing 1 to seal the receiving cavity 11, preventing foreign matter from entering the receiving cavity 11 and affecting the operation of the counting component 3. This also makes the structure of the counting shaft 32 more stable when rotating. When the circuit breaker opens and closes, it drives the swing arm 4 to swing. Specifically, the swing arm 4 is connected to the operating mechanism of the circuit breaker, or it can be connected to the operating mechanism in the high and low voltage switchgear. The swing arm 4 drives the counting shaft 32 to rotate, which in turn drives the lowest counting wheel 311 to rotate, simultaneously deforming the torsion spring 35. After releasing the counting shaft 32, the torsion spring 35 returns to its original position, causing the counting shaft 32 to return to its original position. Each rotation of the counting shaft 32 corresponds to one count. As the lowest digit counting wheel 311 counts sequentially from zero to nine, when a carry-over is needed, the carry-over tooth 314 engages with the carry-over wheel 331, driving the carry-over wheel 331 to rotate and consequently rotating the counting wheel at the tens digit, thus achieving the carry-over. Simultaneously, the carry-over tooth 314 disengages from the carry-over wheel 331, and the lowest digit counting wheel 311 counts again sequentially. This process repeats continuously. The counting device has a compact overall structure and small size, making it suitable for small spaces. Furthermore, it offers multiple operating directions to meet various usage needs. During installation, the carry-over wheel shaft 34 can be first mounted on the bracket 2, followed by the sequential installation of the highest digit counting wheel 312, carry-over wheel 331, intermediate counting wheel 313, carry-over wheel 331, lowest digit counting wheel 311, and torsion spring 35. Finally, the counting shaft 32 is installed to form a complete unit.The entire assembly is then installed into the receiving cavity 11 of the outer casing 1, and a transparent cover plate is inserted into the slot 12, allowing the counting process to be observed through the transparent cover plate. The end cap 7 is then fixed to the outer casing 1 to form a seal. Two extension plates 13 are integrally provided on the outer casing 1, symmetrically arranged and opposite to the slot 12 of the outer casing 1. The extension plates 13 have openings 131, allowing screws to be inserted into the openings 131 to fix the outer casing 1. Alternatively, the extension plates 13 can be inserted into the slot 221 of the circuit breaker for installation. This provides various installation methods and good stability. The outer casing, bracket, end cap, counting wheel set, and carry wheel set are all made of plastic, making the counting device lighter and less heavy.

[0046] The outer casing 1 also includes a positioning disk 8, which is located between the bracket 2 and the driving component 5 and is connected to the bracket 2. One end of the feed wheel shaft 34 is fixed to the bracket 2, and the other end is fixed to the positioning disk 8, positioning the components inside the bracket 2 to ensure structural stability and avoid affecting the counting function. The positioning disk 8 has two symmetrically arranged arc-shaped limiting grooves 81, and the driving component 5 has corresponding limiting blocks 51. The limiting blocks 51 are located in the limiting grooves 81 and slide relative to the limiting grooves 81 when the counting shaft 32 rotates, thus controlling the rotation angle of the counting shaft 32. The counting shaft 32 is limited in angle so that each rotation of the counting shaft 32 drives the lowest counting wheel 311 to count once. The mounting cavity 22 is integrally provided with two symmetrically arranged connecting shafts 222. The inner sidewalls of the two connecting shafts 222 are threaded. The positioning disk 8 is provided with corresponding connecting posts 82 with openings at both ends. The two connecting posts 82 are inserted into the corresponding connecting shafts 222 and fixed by screws. The positioning disk 8 is connected to the bracket 2 by screws and is fixedly set. The two ends of the feed wheel shaft 34 are located on the bracket 2 and the positioning disk 8 to make its structure stable. When the feed wheel 331 rotates, it will not affect the other adjacent feed wheels 331.

[0047] The driving component 5 is disc-shaped, and symmetrically equipped with driving pawls 52. The inner wall of the lowest counting wheel 311 has several ratchet teeth 3111 arranged circumferentially. When the driving component 5 rotates, the driving pawls 52 and ratchet teeth 3111 cooperate to drive the lowest counting wheel 311 to rotate. The positioning disk 8 is equipped with a positioning pawl. There is a gap between the driving pawl 52 and the driving component 5, and also a gap between the positioning pawl and the positioning disk 8, to facilitate elastic deformation of the pawl, so that the pawl can drive the lowest counting wheel 311 to rotate. The counting shaft 32 drives the driving component 5 to rotate, and the driving pawls 52 and ratchet teeth 3111 cooperate to drive the lowest counting wheel 311 to rotate for counting. The positioning pawl ensures that the counting wheel can only rotate in one direction, avoiding counting errors.

[0048] Each carry wheel 331 is provided with a plurality of long teeth 332 and short teeth 333 arranged in an alternating manner. The long teeth 332 and short teeth 333 are arranged along the axis 34 of the carry wheel. The inner sidewalls of the intermediate counting wheel 313 and the highest counting wheel 312 are provided with tooth grooves 315 that mate with the long teeth 332 and short teeth 333. The carry protrusion 314 is provided with a carry groove 3141 that mates with the long teeth 332. The end face of the long teeth 332 is arc-shaped. When the count is full... When carry-over is required, the carry-over tooth 314 rotates to the carry-over wheel 331. The carry-over tooth 314 moves the short tooth 333, and the long tooth 332 enters the carry-over groove 3141. When the counting wheel rotates, it drives the carry-over wheel 331 to rotate. The carry-over wheel 331 drives the counting wheel that it is in sync with to rotate, thus realizing carry-over. After carry-over, the long tooth 332 disengages from the carry-over groove 3141. The end face of the long tooth 332 is arc-shaped to facilitate its entry and exit from the carry-over groove 3141.

Claims

1. A counting device used in a circuit breaker, characterized in that, The device includes a housing (1), a bracket (2) disposed within the housing (1), and a counting assembly (3). The housing (1) has a receiving cavity (11) and a slot (12). The bracket (2) is installed in the receiving cavity (11). The slot (12) communicates with the receiving cavity (11), and a transparent cover is installed in the slot (12). The counting assembly (3) includes a counting wheel set (31), a counting shaft (32), a carry wheel set (33), a carry wheel shaft (34), and a counting wheel axle (35). The torsion spring (35), the bracket (2) is cylindrical, the bracket (2) has an installation cavity (22) and a fixed shaft (23) integrally formed in the installation cavity (22), the installation cavity (22) has a slot (221) on one side, the end of the carry wheel shaft (34) is installed on the bracket (2) and is opposite to the fixed shaft (23), the counting wheel group (31) is sleeved on the outer periphery of the bracket, the carry wheel group is sleeved on the carry wheel shaft, and the carry wheel group (33) Part of the counting shaft (32) is exposed outside the mounting cavity (22) from the slot (221). The counting shaft (32) is arranged along the axial direction of the bracket (2) and rotates relative to the bracket (2). The first end of the counting shaft (32) extends to the outside of the outer shell (1) and is connected to a swing arm (4). The second end of the counting shaft (32) is provided with a drive (5) that rotates synchronously with it. The swing arm (4) includes a fixed end (41) and a swing end (42). The fixed end (41) is provided with a first connecting hole (4). 11) A second connecting hole (421) is provided on the swing end (42). The end of the first end of the counting shaft (32) is knurled and located in the first connecting hole (411), and is riveted to the fixed end (41). The driving member (5) cooperates with the first counting wheel to drive the counting wheel to rotate. The torsion spring (35) is sleeved on the counting shaft (32) and one end is sleeved on the fixed shaft (23) so as to automatically reset the counting shaft (32) after the counting shaft (32) rotates.

2. The counting device applied to a circuit breaker according to claim 1, characterized in that, The fixed end (41) is also provided with a third connecting hole (412) that is the same as the first connecting hole (411). A fastener (9) is inserted into the third connecting hole (412), and the end of the fastener (9) is set to abut against the first end of the counting shaft (32).

3. The counting device applied to a circuit breaker according to claim 1 or 2, characterized in that, The counting wheel group (31) includes multiple counting wheels that are sequentially rotated and sleeved on the outer periphery of the bracket (2) from right to left. The counting wheel at the rightmost end is the lowest position counting wheel (311), the counting wheel at the leftmost end is the highest position counting wheel (312), and the middle counting wheel (313) is located between the lowest position counting wheel (311) and the highest position counting wheel (312). The carry wheel group (33) includes multiple carry wheels (331). Each carry wheel (331) is sleeved on the carry wheel shaft (34) and cooperates with the middle counting wheel (313) and the highest position counting wheel (312). Each counting wheel has a carry tooth (314) on its left side surface that drives the carry wheel (331) to rotate. Ten numbers from 0 to 9 are evenly distributed on the outer periphery of each counting wheel. The carry tooth (314) is located between the numbers 0 and 9.

4. The counting device applied to a circuit breaker according to claim 1 or 2, characterized in that, The outer casing (1) is also provided with a positioning disk (8), which is located between the bracket (2) and the drive component (5), and the positioning disk (8) is connected to the bracket (2). One end of the advance wheel shaft (34) is fixed on the bracket (2), and the other end is fixed on the positioning disk (8).

5. The counting device applied to a circuit breaker according to claim 1 or 2, characterized in that, The second end of the counting shaft (32) is also provided with a knurled structure. The driving component (5) is sleeved on the knurled part of the counting shaft (32) and riveted to the counting shaft (32).

6. The counting device applied to a circuit breaker according to claim 4, characterized in that, The driving component (5) is arranged in a disc shape. The driving component (5) is symmetrically provided with driving pawls (52). The inner side wall of the lowest position counting wheel (311) is provided with a number of ratchet teeth (3111) along its circumference. When the driving component (5) rotates, the driving pawls (52) and ratchet teeth (3111) cooperate to drive the lowest position counting wheel (311) to rotate. The positioning disk (8) is provided with positioning pawls.

7. The counting device applied to a circuit breaker according to claim 4, characterized in that, The positioning disk (8) is symmetrically provided with two arc-shaped limiting grooves (81), and the driving component (5) is provided with a corresponding limiting block (51). The limiting block (51) is located in the limiting groove (81), and when the counting shaft (32) rotates, the limiting block (51) slides relative to the limiting groove (81).

8. The counting device applied to a circuit breaker according to claim 7, characterized in that, The mounting cavity (22) is integrally provided with two symmetrically arranged connecting shafts (222). The inner sidewalls of the two connecting shafts (222) have threaded sections. The positioning plate (8) is provided with corresponding connecting posts (82) with openings at both ends. The two connecting posts (82) are inserted into the corresponding connecting shafts (222) and fixed by screws.

9. The counting device applied to a circuit breaker according to claim 3, characterized in that, Each carry wheel (331) is provided with a number of long teeth (332) and short teeth (333) arranged in an alternating manner. Each long tooth (332) and short tooth (333) is arranged along the axis (34) of the carry wheel. The inner sidewalls of the intermediate counting wheel (313) and the highest counting wheel (312) are provided with tooth grooves (315) that cooperate with the long teeth (332) and short teeth (333). The carry protrusion (314) is provided with a carry groove (3141) that cooperates with the long teeth (332). The end face of the long teeth (332) is arc-shaped.

10. The counting device applied to a circuit breaker according to claim 1 or 2, characterized in that, It also includes an end cap (7), which covers the end of the accommodating cavity (11) and is fitted onto the second end of the counting shaft (32).

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