Counting accessory and circuit breaker with counting function

Abstract

The present invention provides a counting accessory and a circuit breaker with a counting function, including a mounting shell, and a mechanical counter with a counting shaft for counting, a linkage rod, a swing arm, and a reset torsion spring installed in the mounting shell. One end of the linkage rod extends out of the mounting shell to contact and cooperate with the swinging part of the moving contact of the circuit breaker. One end of the swing arm is fixedly connected to the counting shaft, and the other end is linked to and cooperates with the other end of the linkage rod. The reset torsion spring contacts and cooperates with the linkage rod and / or the swing arm, and is used to drive the linkage rod and / or the swing arm to rotate and reset. The present invention provides a counting accessory with a stable, reliable and independent structure, which is easy to disassemble and install, and can provide technical functions for the circuit breaker without counting function in the prior art through simple installation, thereby improving its use function and meeting actual needs.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to a counting accessory for calculating the number of closing and opening operations, and a circuit breaker with the function of counting the number of closing and opening operations. Background Art

[0002] The molded case circuit breaker is a commonly used electrical device. In addition to protecting the circuit, it is usually also used as a switch. Therefore, in actual use, there is a situation where the molded case circuit breaker frequently connects and disconnects the current in a normal circuit. However, the ordinary molded case circuit breakers on the market at present do not have the function of counting the number of closing and opening operations, and their usage conditions rely on the user's subjective impression. When used for a long time, the user often cannot judge the usage conditions and service life of the circuit breaker. Since the service life of the molded case circuit breaker is limited, if it is not replaced in time, it may affect daily life and the use of related electrical products.

[0003] For example, a technical device for an operating mechanism of an air circuit breaker disclosed in Chinese Patent No. 201620862138.7 and a circuit breaker technical device disclosed in Chinese Patent No. 201520695368.4 both adopt a mechanical counter to be linked with the operating mechanism of the circuit breaker to detect the number of closing and opening operations on the circuit breaker. Since this type of device is linked with the operating mechanism, the mechanical counter is often located inside the operating mechanism, which not only requires reserved space, resulting in the complication of the structure at the operating mechanism, but also has the problem that the position of the counter is too deep, leading to inconvenient installation and debugging.

[0004] On the other hand, the existing structure uses a pull ring as a transmission part. The structural stability of the pull ring is poor and the transmission efficiency is low. Therefore, in actual use, it is easy to be damaged and the accuracy of the counting result is also limited.

[0005] Based on this, the present application is proposed. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a counting accessory that is easy to assemble, stable and reliable, and a circuit breaker with the function of calculating the number of closing and opening operations, solves the problems of poor stability and inconvenient assembly of the counting device applied to the circuit breaker in the prior art, and enables the molded case circuit breaker to have the function of counting the closing and opening operations, so as to detect its usage conditions.

[0007] To achieve the above object, the structure of the counting accessory of the present invention is as follows: including

[0008] an installation housing, and installed in the installation housing are:

[0009] a mechanical counter having a counting shaft for counting;

[0010] A linkage rod, one end of which extends out of the mounting housing and is used for contacting and cooperating with the swinging part of the moving contact of the circuit breaker;

[0011] A swing arm, one end of which is fixedly connected to the counting shaft, and the other end of which is linked with the other end of the linkage rod;

[0012] The reset torsion spring cooperates with the linkage rod and / or the swing arm to drive the linkage rod and / or the swing arm to rotate and reset.

[0013] The above structure cooperates with the upper surface of the moving contact of the circuit breaker through the linkage structure composed of the swing arm and the linkage rod, so as to realize the calculation of the closing and opening times directly through the action state of the moving contact. The structure is simple and easy to realize. And because the above linkage structure eliminates the use of unstable parts such as pull rings, it also effectively improves the stability and reliability of the overall structure of the counting accessory. In addition, the accessory provided by the present invention directly calculates from the moving contact, with a reliable source and small counting error.

[0014] In addition, the above structure integrates and separates the mechanical counter and the related linkage structure by centrally installing them in a mounting housing, so that they can be installed and used as accessories, thereby improving the convenience of installation.

[0015] To facilitate assembly and maintain the stability and reliability of the structure, the above-mentioned counting accessory is further configured as follows: the reset torsion spring includes a spring hole and two spring feet, wherein the spring hole is rotatably fixed in the mounting shell by a rotating shaft, one spring foot is in contact with and / or the swing arm, and the other spring foot is in contact with the mounting shell.

[0016] For easy installation and use, the counting accessory is further configured as follows: the swing arm and the linkage rod are linked by a rivet shaft: the rivet shaft includes: a slot for abutting against a spring foot; a knurled shaft body riveted with the swing arm; and a smooth shaft body inserted into a slot provided at the other end of the linkage rod. The slot is strip-shaped.

[0017] In order to protect the internal structure of the accessory, the above-mentioned counting accessory is further configured as follows: a cover body is provided, the cover body cooperates with the installation shell and covers it, and a visible window is provided on the cover body corresponding to the digital indication part of the mechanical counter or the cover body is a transparent cover body.

[0018] In order to facilitate assembly, disassembly and maintenance, the counting accessory is further configured as follows: a slide groove is provided on the top of the installation shell, and the cover body is slidably covered on the installation shell.

[0019] In order to facilitate direct use in the accessory cavity, the above-mentioned technical accessories are further arranged as follows: the digital indication part of the mechanical counter is arranged upward in the installation shell, and the bottom of the installation shell is provided with a slot for one end of the linkage rod to extend out; the shape of the installation shell is adapted to the accessory cavity on the middle cover of the circuit breaker, and a limit step surface is provided between the lower and upper parts of the installation shell for limiting the installation position of the installation shell in the accessory cavity.

[0020] In order to make the accessory structure reasonable and suitable for practical use, the above technical accessories are further arranged as follows: a mounting bracket is provided inside the mounting shell, and the mounting bracket enables the mechanical counter to be installed on the upper part of the mounting shell.

[0021] To facilitate installation, the above technical accessories are further configured as follows: a base plate is provided at the bottom of the mechanical counter, and the base plate is slidably mounted on the mounting bracket.

[0022] In order to optimize the structural design, the above technical accessories are further arranged as follows: a strip groove is convexly provided on the side wall of the mounting shell, and a convex point is provided on the bottom surface of the cover body opposite to the mounting shell to engage with the strip groove; the other spring foot is in contact with the strip groove.

[0023] Another object of the present invention is to provide a circuit breaker with a counting function for the number of closing and opening times, comprising a circuit breaker body and a middle cover installed in the middle area of ​​the upper side of the circuit breaker body for shielding components such as an operating mechanism, the middle cover being provided with an accessory cavity, the accessory cavity being provided with a counting accessory as described above, and the bottom of the accessory cavity being also provided with an opening which is connected to the inside of the circuit breaker and through which one end of a linkage rod can pass.

[0024] The above-mentioned circuit breaker with the function of counting the number of closing and opening times is further configured as follows: the accessory chamber is equipped with a mask, and the mask is provided with an observation window corresponding to the numerical indication part of the mechanical counter in the counting accessory.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The present invention realizes the counting detection of closing and opening by making the mechanical counter contact and cooperate with the moving contact, which releases the binding state of the counter and the operating mechanism of the circuit breaker in the prior art. On the one hand, the counter can be separated from the operating mechanism and do not affect each other, thereby simplifying the structural design of the operating mechanism and avoiding the space of the operating mechanism from being occupied. On the other hand, after being combined with the relevant structure, the counter can be used as an independent accessory for optional use, which is more in line with the current use needs.

[0027] Second, the mechanical counter and related structures of the present invention are made independent and accessory, so that they can be directly installed in the accessory cavity in the middle area of the middle cover of the plastic case circuit breaker in the form of an accessory, which greatly facilitates the installation and disassembly of the counter. Users can install it on the plastic case circuit breaker by themselves without having to purchase a new product. Moreover, the counting accessory can be reused. After the circuit breaker is phased out, the counting accessory can be quickly disassembled and installed on a new circuit breaker to continue counting, which can reduce the use cost.

[0028] Third, by providing an independently installable counting accessory, the plastic case circuit breaker can have the function of counting the closing and opening operations only through simple installation, improving the performance of the plastic case circuit breaker. Users can also accurately understand the number of closing and opening operations of the current circuit breaker through the digital display on the mechanical counter. Combining with the service life of the product given by the manufacturer, the approximate working state of the circuit breaker can be judged, so as to facilitate the timely replacement of the circuit breaker. And, whether the circuit breaker is energized or not during the closing and opening operations, the number of times can be accurately recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the overall circuit breaker in a specific embodiment of the present invention.

[0030] Figure 2 Schematic diagram of the assembly of the circuit breaker - counting accessory in a specific embodiment of the present invention.

[0031] Figure 3 Schematic diagram of the structure of the circuit breaker body in a specific embodiment of the present invention.

[0032] Figure 4 Schematic diagram of the overall counting accessory in a specific embodiment of the present invention.

[0033] Figure 5 Schematic diagram of the overall structure of the counting accessory in a specific embodiment of the present invention.

[0034] Figure 6 Schematic diagram of the bottom structure of the counting accessory in a specific embodiment of the present invention.

[0035] Figure 7 Figure 5 Partial enlarged schematic diagram

[0036] Figure 8 Schematic diagram of the assembly of the mechanical counter - swing arm in a specific embodiment of the present invention.

[0037] Figure 9 Schematic diagram of the structure of the installation housing in a specific embodiment of the present invention.

[0038] Figure 10 Schematic diagram of the transparent cover in a specific embodiment of the present invention.

[0039] Figure 11 This is a schematic diagram of the linkage structure assembly in a specific embodiment of the present invention.

[0040] Figure 12 This is a schematic diagram of the swing arm structure in a specific embodiment of the present invention.

[0041] Figure 13 This is a schematic diagram of the linkage rod structure in a specific embodiment of the present invention.

[0042] Figure 14 This is a schematic diagram of the torsion spring structure in a specific embodiment of the present invention.

[0043] Figure 15 This is a schematic diagram of the mounting shaft structure in a specific embodiment of the present invention.

[0044] Figure 16 This is a schematic diagram of the riveting shaft structure in a specific embodiment of the present invention.

[0045] Figure 17 This is Schematic Diagram I of the counting process in a specific embodiment of the present invention.

[0046] Figure 18 This is Schematic Diagram II of the counting process in a specific embodiment of the present invention.

[0047] Figure 19 This is Schematic Diagram III of the counting process in a specific embodiment of the present invention.

[0048] Reference numerals: 1 - Circuit breaker body, 2 - Middle cover, 3 - Accessory mask, 4 - Counting accessory, 5 - Moving contact component, 6 - Rotating surface on the moving contact, 7 - Static contact, 8 - Mounting housing, 9 - Mechanical counter assembly, 10 - Swing arm, 11 - Linkage rod, 12 - Torsion spring, 13 - Mounting shaft, 14 - Riveting shaft, 15 - Transparent cover body; 2-1 - Accessory cavity, 2-2 - Bottom opening, 8-1 - Left card slot, 8-2 - Right card slot, 8-3 - Side mounting hole 1, 8-4 - Side mounting hole 2, 8-5 - Left strip-shaped slot, 8-6 - Right strip-shaped slot, 8-7 - Left sliding groove, 8-8 - Right sliding groove, 8-9 - Strip-shaped through groove;

[0049] 9-1 - Bottom plate, 9-2 - Counting shaft, 9-3 - Fastening pin, 9-4 - Mechanical counter, 11-1 - Strip-shaped opening slot, 11-2 - Middle fixing hole, 11-3 - Contact inclined surface, 10-1 - Swing end opening, 10-2 - Fixed end opening; 12-1 - Spring hole, 12-2 - Spring foot 1, 12-3 - Spring foot 2, 13-1 - Large shaft surface, 13-2 - Small shaft surface, 14-1 - Claw slot, 14-2 - Knurled shaft body, 14-3 - Smooth shaft body, 15-1 - Insertion plate, 15-2 - Convex point. Detailed implementation manners

[0050] Example 1 This example provides a circuit breaker with a counting function, asFigure 1 As shown in the figure, it includes a circuit breaker body 1, an operating mechanism, a trip device, a moving contact component 5, a static contact 7, etc. Among them, components such as the operating mechanism, the trip device, the moving contact component 5, and the static contact 7 are all installed on the circuit breaker body 1. A middle cover 2 is installed on the middle opening of the circuit breaker body 1. The middle cover 2 covers the middle opening and encloses the above components or structures in the enclosed space formed by the combination of the circuit breaker body 1 and the middle cover 2 after being covered. An opening through which a toggle handle can pass is provided in the middle of the middle cover 2.

[0051] Combined with Figure 2 、 Figure 3 As shown in the figure, an accessory cavity 2-1 is provided in the middle cover 2 of the circuit breaker body 1. In a molded case circuit breaker, the operating mechanism is arranged in the middle position, and an accessory cavity 2-1 is respectively arranged on both sides of the operating mechanism. A counting accessory 4 is installed in the accessory cavity 2-1, and a bottom opening 2-2 communicating with the inside of the circuit breaker is also provided at the bottom of the accessory cavity 2-1. The accessory cavity 2-1 is also equipped with a face mask, and an observation window is provided on the face mask corresponding to the numerical indication part in the counting accessory 4, so as to directly observe the specific make-and-break numerical values of the circuit breaker from the front of the circuit breaker.

[0052] The structure of the counting accessory 4 is as follows: The counting accessory 4 includes an installation housing 8, and a mechanical counter 9-4, a linkage rod 11, a swing arm 10, and a reset torsion spring 12 installed in the installation housing 8. A transparent cover 15 is also provided above the installation housing 8 to cover it. In a more preferred embodiment, a left chute 8-7 and a right chute 8-8 are provided at the top of the installation housing 8, and the transparent cover 15 can be slidably covered on the installation housing 8 through the plug board 15-1 thereon.

[0053] The installation housing 8 is divided into upper and lower spaces. For the convenience of installation, a step structure is provided between the upper space and the lower space to form a limiting step surface, so as to ensure that the counting accessory 4 is installed in the correct position when the counting accessory 4 is installed in the accessory cavity 2-1, so that the counting accessory 4 can work properly.

[0054] For installing the mechanical counter 9-4, an installation bracket is provided in the installation housing 8 in this embodiment, and the mechanical counter 9-4 is installed in the upper part of the installation housing 8 by the installation bracket. And for the convenience of the overall assembly of the counting accessory 4, a left card slot 8-1 and a right card slot 8-2 are provided on the installation bracket, and a bottom plate 9-1 is provided on the mechanical counter 9-4. Through the bottom plate 9-1, the mechanical counter 9-4 can be clamped and installed between the left card slot 8-1 and the right card slot 8-2 of the installation bracket in a horizontally sliding plug-in manner.

[0055] The mechanical counter 9-4 has a counting shaft 9-2 for counting, and the digital indication part of the mechanical counter 9-4 is arranged upward in the mounting housing 8. One end of the swing arm 10 is fixedly connected to the counting shaft 9-2, and the other end is linked with the other end of the linkage rod 11. One end of the linkage rod 11 passes through the strip-shaped through slot 8-9 at the bottom of the mounting housing 8, reaches the inside of the circuit breaker and is in contact and cooperation with the rotating surface 6 on the moving contact in the moving contact member 5 below it.

[0056] In this embodiment, the specific structure and connection relationship of the swing arm 10 - linkage rod 11 - return torsion spring 12 are as follows: As Figure 11 shown, the linkage rod 11 is a V-shaped crank arm, one end of which is provided with a strip-shaped opening slot 11-1, and the bottom of the other end is provided with a contact inclined surface 11-3.

[0057] The structure of the swing arm 10 is as Figure 12 shown. The end fixedly connected to the counting shaft 9-2 is the fixed end. The end of the fixed end is provided with a fixed-end opening 10-2, and the fixed-end opening 10-2 is fixedly connected to the mechanical counting shaft 9-2. Preferably, the counting shaft 9-2 can also be set as a knurled shaft at this connection to be riveted and fixed with the swing arm 10. The other end of the swing arm 10 can swing with the fixed end as the fulcrum, which is the swing end, and a swing-end opening 10-1 is opened on the swing end.

[0058] The structure of the return torsion spring 12 is as Figure 14 shown. It includes a spring hole 12-1, a first spring leg 12-2 and a second spring leg 12-3. The swing arm 10 and the linkage rod 11 are linked by a riveting shaft 14. The structural features on the riveting shaft 14 include a clamping foot groove 14-1, a knurled shaft body 14-2 and a smooth shaft body 14-3. Among them, the clamping foot groove 14-1 is an inward concave annular groove arranged at one end of the riveting shaft 14. The first spring leg 12-2 of the return torsion spring 12 is clamped in the clamping foot groove 14-1 and is in contact and cooperation with the riveting shaft 14, and the second spring leg 12-3 abuts against the mounting housing 8.

[0059] The knurled shaft body 14-2 and the smooth shaft body 14-3 are different parts of a shaft rod on the same axis. In a preferred embodiment shown in the appendix Figure 16 the knurled shaft body 14-2 is located in the middle and the smooth shaft body 14-3 is located outside. Its installation is as follows: After the riveting shaft 14 passes through the swing-end opening 10-1 of the swing arm 10, the knurled shaft body 14-2 is riveted and fixed with the swing-end opening 10-1, and then the smooth shaft body 14-3 is inserted into the strip-shaped opening slot 11-1 at the other end of the linkage rod 11 and is in plug-in cooperation with it. It realizes the transmission of force by contacting the groove wall of the strip-shaped opening slot 11-1.

[0060] In the above structure, since the spring leg 12-2 of the reset torsion spring 12 is engaged with the catch groove 14-1 of the swing arm 10, the reset torsion spring 12 is in contact and cooperation with the linkage rod 11 and the swing arm 10 at the same time. Furthermore, by driving the connection points of the linkage rod 11 and the swing arm 10, the simultaneous reset of the linkage rod 11 and the swing arm 10 is achieved.

[0061] To prevent the second spring leg 12-3 from swinging or shifting out of position when it abuts against the side wall of the mounting housing 8, which may affect the reset function, in this embodiment, a contact groove is provided on the side wall of the mounting housing 8, and the second spring leg 12-3 is clamped in the contact groove, which can effectively prevent it from rotating.

[0062] In another specific embodiment, to ensure the stability after the transparent cover 15 and the mounting housing 8 are closed, a corresponding clamping structure can be provided between the transparent cover 15 and the mounting housing 8. One preferred implementation structure is that the left strip-shaped slot 8-5 and the right strip-shaped slot 8-6 are convexly provided on the side wall of the mounting housing 8, and the limiting convex points 15-2 are provided on the bottom surface of the transparent cover 15 opposite to the mounting housing 8 and are clamped and matched with the strip-shaped slots. In this way, after the transparent cover 15 is pushed to the designated position and is oppositely closed with the mounting housing 8, the clamping points enter the left strip-shaped slot 8-5 and the right strip-shaped slot 8-6, and the transparent cover 15 is fixed on the mounting housing 8.

[0063] Of course, to facilitate the disassembly of the transparent cover 15, the following structure can be further provided: by expanding the widths of the left sliding groove 8-7 and the right sliding groove 8-8 and making them larger than the thickness of the plug-in, and at the same time limiting the lengths of the left sliding groove 8-7 and the right sliding groove 8-8, the transparent cover 15 can be easily separated from the mounting housing 8 by tilting the clamping points out of the left strip-shaped slot 8-5 and the right strip-shaped slot 8-6.

[0064] Combined with the above structure, in yet another specific embodiment with a simpler structure, the contact groove and the left strip-shaped slot 8-5 can be set as the same structure at the same position, which is convenient for processing and can optimize the structure of the mounting housing 8.

[0065] The circuit breaker counting process in this embodiment is as Figures 17 - 19 shown Figures 17 - 19 The process of opening the circuit breaker is as follows: in the closed state, the contact inclined surface 11-3 at the bottom end of the linkage rod 11 is in contact and cooperation with the rotating surface 6 on the moving contact; when opening the circuit breaker, the moving contact member 5 rotates upward and separates from the static contact 7, and the rotating surface 6 on the moving contact drives the contact inclined surface 11-3 to swing upward. Synchronously, the swing arm 10 also swings accordingly. During this process, the contact inclined surface 11-3 of the linkage rod 11 moves on the rotating surface 6 of the moving contact. When the moving contact member 5 rotates to the position as shown in Figure 19When the situation shown in the figure occurs, the opening operation is completed. The contact inclined surface 11-3 moves from initially contacting the left part of the rotating surface 6 of the moving contact to contacting the right part of the rotating surface 6 of the moving contact. Of course, at this time, the swing arm 10 also swings to the limit, and when it swings, it also drives the counting shaft on the mechanical counter 9 to rotate together for one count.

[0066] On the contrary, Figures 19 - 17 For the closing process, during the closing process, the reset torsion spring 12 drives the swing arm 10 to return to the initial position with its torsion force, waiting to start counting when the next opening occurs.

[0067] Embodiment 2 This embodiment provides a counting accessory 4, and the structure of the counting accessory 4 is as follows: The counting accessory 4 includes an installation housing 8, and a mechanical counter 9-4, a linkage rod 11, a swing arm 10, and a reset torsion spring 12 installed in the installation housing 8. A transparent cover 15 is also provided above the installation housing 8 to cover it. In a more preferred implementation manner, the top of the installation housing 8 is provided with a left sliding groove 8-7 and a right sliding groove 8-8, and the transparent cover 15 can be slidably covered on the installation housing 8 through the insertion plate 15-1 thereon.

[0068] The installation housing 8 is divided into upper and lower spaces. For the convenience of installation, a stepped structure is provided between the upper space and the lower space to form a limiting step surface, so as to ensure that the counting accessory 4 is installed in the correct position when the counting accessory 4 is installed in the accessory cavity 2-1, enabling the counting accessory 4 to work properly.

[0069] For installing the mechanical counter 9-4, in this embodiment, an installation bracket is provided in the installation housing 8, and the installation bracket installs the mechanical counter 9-4 in the upper part of the installation housing 8. And for the convenience of the overall assembly of the counting accessory 4, a left card slot 8-1 and a right card slot 8-2 are provided on the installation bracket, and a bottom plate 9-1 is provided on the mechanical counter 9-4. Through the bottom plate 9-1, the mechanical counter 9-4 can be clamped and installed between the left card slot 8-1 and the right card slot 8-2 of the installation bracket in a horizontally sliding plug-in manner.

[0070] The mechanical counter 9-4 has a counting shaft 9-2 for counting, and the digital indication part of the mechanical counter 9-4 is arranged upward in the installation housing 8. One end of the swing arm 10 is fixedly connected to the counting shaft 9-2, and the other end is linked with the other end of the linkage rod 11. One end of the linkage rod 11 passes through the strip-shaped through groove 8-9 at the bottom of the installation housing 8, reaches the inside of the circuit breaker, and is in contact and cooperation with the rotating surface 6 on the moving contact in the moving contact component 5 below.

[0071] In this embodiment, the specific structure and connection relationship of the swing arm 10 - linkage rod 11 - reset torsion spring 12 are as follows: As Figure 12As shown, the linkage rod 11 is a V-shaped crank arm, with a strip-shaped opening groove 11-1 provided at one end and a contact inclined surface 11-3 provided at the bottom of the other end.

[0072] The structure of the swing arm 10 is as Figure 12 shown. The end where it is fixedly connected to the counting shaft 9-2 is the fixed end. An opening 10-2 is provided at the end of the fixed end, and the opening 10-2 at the fixed end is fixedly connected to the mechanical counting shaft 9-2. Preferably, the counting shaft 9-2 can also be set as a knurled shaft at this connection to be riveted and fixed with the swing arm 10. The other end of the swing arm 10 can swing with the fixed end as the fulcrum, which is the swing end, and an opening 10-1 is provided at the swing end.

[0073] The structure of the return torsion spring 12 is as Figure 14 shown. It includes a spring hole 12-1, a first spring leg 12-2, and a second spring leg 12-3. The swing arm 10 and the linkage rod 11 are linked by a rivet shaft 14. The structural features on the rivet shaft 14 include a retaining foot groove 14-1, a knurled shaft body 14-2, and a smooth shaft body 14-3. Among them, the retaining foot groove 14-1 is an inward concave annular groove provided at one end of the rivet shaft 14. The first spring leg 12-2 of the return torsion spring 12 is clamped in the retaining foot groove 14-1 and is in contact and cooperation with the rivet shaft 14, and the second spring leg 12-3 abuts against the mounting housing 8.

[0074] The knurled shaft body 14-2 and the smooth shaft body 14-3 are different parts of a shaft rod on the same axis. In a preferred embodiment shown in the appendix Figure 16 , the knurled shaft body 14-2 is located in the middle and the smooth shaft body 14-3 is located outside. Its installation is as follows: after the rivet shaft 14 passes through the opening 10-1 at the swing end of the swing arm 10, the knurled shaft body 14-2 is riveted and fixed with the opening 10-1 at the swing end, and then the smooth shaft body 14-3 is inserted into the strip-shaped opening groove 11-1 at the other end of the linkage rod 11 for plug-in cooperation, and it realizes the transmission of force by contacting the groove wall of the strip-shaped opening groove 11-1. In another specific embodiment, the strip-shaped opening groove 11-1 can also be replaced by a strip-shaped through groove 8-9.

[0075] To prevent the second spring leg 12-3 from swinging or shifting out of position when abutting against the side wall of the mounting housing 8 and affecting the reset function, in this embodiment, a retaining groove is provided on the side wall of the mounting housing 8, and the second spring leg 12-3 is clamped in the retaining groove, which can effectively prevent it from rotating.

[0076] Example 3 This example is further configured as follows on the basis of Example 2: In order to ensure the stability of the transparent cover body 15 and the mounting shell 8 after they are covered, a left strip groove 8-5 and a right strip groove 8-6 are convexly provided on the side wall of the mounting shell 8, and a limiting protrusion 15-215-2 is provided on the bottom surface of the transparent cover body 15 opposite to the mounting shell 8, which is engaged with the strip groove. In this way, after the transparent cover body 15 is pushed to the specified position and covered with the mounting shell 8, the card point enters the left strip groove 8-5 and the right strip groove 8-6 to fix the transparent cover body 15 on the mounting shell 8.

[0077] Embodiment 4 This embodiment is further configured as follows on the basis of Embodiment 3: To facilitate the removal of the transparent cover 15, the width of the left slide groove 8-7 and the right slide groove 8-8 can be slightly larger than the thickness of the plug-in, for example, 1.5 to 3 mm larger, and at the same time, the length of the left slide groove 8-7 and the right slide groove 8-8 is limited, for example, the length is 3 to 10 mm. Under this ratio, the transparent cover 15 can be separated from the mounting shell 8 by first lifting the transparent cover 15 and then pulling it out.

[0078] Embodiment 5 This embodiment is further configured as follows based on Embodiment 3 and Embodiment 4: the interference groove and the left strip-shaped groove 8-5 can be configured as the same structure at the same position, which can simplify the structural design of the mounting shell 8 for easy processing.

[0079] Embodiment 6 The difference between this embodiment and the above embodiments is that the transparent cover 15 is replaced by an opaque cover 15, and the portion of the opaque cover 15 corresponding to the digital display of the mechanical count can be set to be partially transparent or an open structure.

[0080] In summary, the present invention provides a counting accessory 4 and a circuit breaker with a counting function of the number of closing and opening times installed by installing the counting accessory 4. The counting accessory 4 is suitable for practical use by providing a counting accessory 4 with a stable, reliable and independent structure, which is easy to disassemble and install. It can also provide technical functions for circuit breakers without counting functions in the prior art through simple installation, thereby improving their use functions and meeting actual needs.

Claims

1. A molded case circuit breaker with a counting function, characterized in that: It comprises a circuit breaker body and a middle cover mounted on the circuit breaker body, wherein the middle cover is provided with an accessory cavity, wherein a counting accessory is mounted in the accessory cavity, and an opening which is communicated with the inside of the circuit breaker and through which one end of a linkage rod can pass is also provided at the bottom of the accessory cavity, wherein the counting accessory comprises a mounting shell, and mounted in the mounting shell: a mechanical counter having a counting shaft for counting, wherein the digital indication part of the mechanical counter is disposed upward in the mounting shell; a linkage rod, wherein the linkage rod is a V-shaped crank arm, wherein one end of the linkage rod is provided with a strip-shaped opening groove, and the bottom of the other end is provided with a contact inclined surface which contacts and cooperates with the swinging part of the moving contact of the circuit breaker, wherein the contact inclined surface passes through the opening at the bottom of the mounting shell, directly reaches the inside of the circuit breaker, and contacts and cooperates with the rotating surface on the moving contact in the moving contact component therebelow; A swing arm, wherein one end of the swing arm fixedly connected to the counting shaft is a fixed end, an end of the fixed end is provided with a fixed end opening, the fixed end opening is fixedly connected to the mechanical counting shaft, the other end of the swing arm is a swing end and can swing with the fixed end as a fulcrum, and a swing end opening is provided on the swing end; a reset torsion spring is in contact with the linkage rod and / or the swing arm to drive the linkage rod and / or the swing arm to rotate and reset; The swing arm and the linkage rod are linked via a rivet shaft: the rivet shaft comprises: a slot for abutting against a spring foot; a knurled shaft body riveted with the swing arm; and a smooth shaft body inserted into a slot provided at the other end of the linkage rod.

2. The plastic case circuit breaker with a counting function according to claim 1, characterized in that: The reset torsion spring comprises a spring hole and two spring legs, wherein the spring hole is rotatably fixed in the mounting shell through a rotating shaft, one spring leg is in contact with and / or the swing arm, and the other spring leg is in contact with the mounting shell.

3. The molded case circuit breaker with a counting function according to claim 2, characterized in that: A cover body is provided, which cooperates with the installation shell and covers the installation shell, and a visible window is provided on the cover body corresponding to the digital indication part of the mechanical counter, or the cover body is a transparent cover body.

4. The molded case circuit breaker with a counting function according to claim 3, characterized in that: A sliding groove is arranged on the top of the installation shell, and the cover body is slidably covered on the installation shell.

5. The molded case circuit breaker with a counting function according to claim 1, characterized in that: The digital indication part of the mechanical counter is arranged upward in the installation shell, and the bottom of the installation shell is provided with a slot for one end of the linkage rod to extend out; the shape of the installation shell is adapted to the accessory cavity on the circuit breaker, and a limit step surface is provided between the lower and upper parts of the installation shell for limiting the installation position of the installation shell in the accessory cavity.

6. The molded case circuit breaker with a counting function according to claim 1, characterized in that: A mounting bracket is arranged inside the mounting shell, and the mounting bracket enables the mechanical counter to be mounted on the upper part of the mounting shell.

7. The molded case circuit breaker with a counting function according to claim 6, wherein: A bottom plate is provided at the bottom of the mechanical counter, and the bottom plate is slidably mounted on the mounting bracket.

8. The molded case circuit breaker with a counting function according to claim 3, characterized in that: A strip-shaped slot is convexly provided on the side wall of the installation shell, and a convex point is provided on the bottom surface of the cover body opposite to the installation shell to engage with the strip-shaped slot; the other spring foot is in contact with the strip-shaped slot.

9. The molded case circuit breaker with a counting function according to claim 1, characterized in that: The accessory cavity is provided with a mask, and the mask is provided with an observation window corresponding to the numerical indication part of the mechanical counter in the counting accessory.

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