Motor protection circuit breaker

Abstract

The utility model discloses a motor protection circuit breaker, and relates to the technical field of low-voltage electric appliances, the motor protection circuit breaker comprises a circuit breaker, a contactor and at least one junction box, the circuit breaker is fixedly connected with the contactor, and the junction box is detachably connected with the circuit breaker and the contactor. The contactor is provided with a supporting part, the supporting part is provided with a dismounting through hole, and the supporting part is used for supporting the junction box. And the stress direction of the junction box during disassembly is the same as the supporting direction of the supporting part. The junction box is partially in contact with the supporting part, and the junction box is not shielded at the disassembly through hole. According to the motor protection circuit breaker provided by the invention, the assembly structure between the junction box and the shell can be simplified, and the disassembly operation of the junction box is facilitated.

Description

Technical Field

[0001] This application relates to the technical field of low-voltage electrical appliances, and particularly relates to a motor protection circuit breaker. Background Art

[0002] The main function of a motor protection circuit breaker is to protect the motor from damage caused by abnormal current conditions such as overload and short circuit, and to ensure the stable operation and safety of the motor. A motor protection circuit breaker usually includes components such as a circuit breaker, a contactor, and a thermal relay, and these components cooperate with each other to achieve the protection of the motor.

[0003] Existing motor protection circuit breakers also include a junction box for connecting wires. The junction box is usually connected to the circuit breaker and the contactor. The junction box is prone to aging or damage during long-term use and needs to be removed and replaced in time to ensure the normal use of the motor protection circuit breaker.

[0004] However, due to the unreasonable assembly between the junction box and the circuit breaker and the contactor in the prior art, the removal operation of the junction box is difficult and it is easy to damage other components. Utility Model Content

[0005] The purpose of this application is to provide a motor protection circuit breaker that can simplify the assembly structure of the junction box and facilitate the removal operation of the junction box.

[0006] In a first aspect, an embodiment of this application provides a motor protection circuit breaker, including a circuit breaker, a contactor, and at least one junction box. The circuit breaker is fixedly connected to the contactor, and the junction box is detachably connected to the circuit breaker and the contactor. A support portion is provided on the contactor, and a disassembly through hole is provided on the support portion. The support portion is used to support the junction box. The force application direction of the junction box during disassembly is the same as the support direction of the support portion. The junction box partially contacts the support portion, and the junction box is not shielded at the disassembly through hole.

[0007] Based on the above embodiment of this application, by providing a disassembly through hole on the support portion, it is convenient to apply a disassembly force to the junction box in the support direction without affecting the support function of the support portion on the junction box, which is beneficial to simplifying the disassembly operation of the junction box and improving the disassembly efficiency. At the same time, the avoidance of the disassembly through hole on the support portion for the junction box is beneficial to reducing the possibility of damage to other components of the motor protection circuit breaker during the removal process and improving the overall structural stability of the motor protection circuit breaker.

[0008] In some examples, the support portion includes a support plate, and at least one disassembly through hole is provided on the support plate.

[0009] Based on the above embodiments of the present application, the support portion is set as a tray. The structure of the tray is relatively simple, which is convenient for opening the disassembly through hole and has little influence on the disassembly operation of the junction box. At the same time, increasing the number of disassembly through holes opened on the tray helps to disperse the disassembly force received by the junction box, thereby contributing to the smooth progress of the disassembly process.

[0010] In some examples, the support portion includes a plurality of trays, and the gap between the plurality of trays is the disassembly through hole.

[0011] Based on the above embodiments of the present application, taking the gap between a plurality of spaced trays as the disassembly through hole can not only facilitate directly applying a disassembly force to the junction box through the gap between adjacent trays while meeting the support conditions, but also reduce the processing procedures of the disassembly through hole and simplify the structure of the base.

[0012] In some examples, the disassembly through hole is set as a U-shaped through hole.

[0013] Based on the above embodiments of the present application, setting the disassembly through hole as a U-shaped through hole can further simplify the disassembly operation of the junction box, is beneficial to improving the disassembly efficiency, and is beneficial to reducing the influence of the disassembly operation on other components of the motor protection circuit breaker, with higher operation safety.

[0014] In some examples, a first limiting portion is further provided on the support portion, a second limiting portion is provided on the junction box, and the first limiting portion and the second limiting portion can limit each other in a direction parallel to the support portion.

[0015] Based on the above embodiments of the present application, the cooperation of the first limiting portion and the second limiting portion can limit the assembly direction and disassembly direction of the junction box, ensuring that when a disassembly force is applied to the junction box through the disassembly through hole, the moving direction of the junction box is consistent with the force direction, preventing the situation that the junction box separates from other directions due to forces in other directions during the disassembly process of the junction box, and reducing the risk of damage to the junction box and other components of the motor protection circuit breaker.

[0016] In some examples, a support portion and a third limiting portion are provided on the same side wall of the base of the contactor. The third limiting portion is arranged in a direction perpendicular to the support portion. A fourth limiting portion is further provided on the junction box, and the third limiting portion and the fourth limiting portion can limit each other in a direction perpendicular to the support portion.

[0017] Based on the above embodiments of the present application, the mutual cooperation between the third limiting portion and the fourth limiting portion can also play a role in restricting the disassembly direction of the junction box, ensuring that when the junction box is subjected to a disassembly force applied to the junction box through the disassembly through hole, the moving direction of the junction box is consistent with the force direction, preventing the junction box from separating from other directions due to forces in other directions during the disassembly process of the junction box, and reducing the risk of damage to the junction box and other components of the motor protection circuit breaker.

[0018] In some examples, the third limiting portion includes at least one guiding boss, and a groove is provided on the guiding boss. The fourth limiting portion includes at least one guiding groove, and a protrusion is provided in the guiding groove, and the protrusion is correspondingly clamped with the groove.

[0019] Based on the above embodiments of the present application, the mutual cooperation between the guiding boss and the guiding groove can play a guiding role during the disassembly process of the junction box, improving the accuracy of the disassembly process. The clamping of the groove on the guiding boss and the protrusion in the guiding groove can play a role in restricting the movement of the junction box, avoiding the junction box from moving under the action of partial forces during the non-disassembly process, and reducing the possibility of misoperation.

[0020] In some examples, a first clamping portion is provided on the junction box, and the arrangement direction of the first clamping portion is parallel to the supporting portion. A second clamping portion is provided on the circuit breaker, and the first clamping portion and the second clamping portion can be clamped with each other along the direction parallel to the supporting portion.

[0021] Based on the above embodiments of the present application, the setting of the first clamping portion and the second clamping portion can cooperate to clamp the junction box and the housing of the circuit breaker, thereby restricting the relative movement between the junction box and the housing. The first clamping portion and the second clamping portion can cooperate with the supporting portion provided on the base, which is beneficial to improving the accuracy and reliability of the disassembly process when disassembling the junction box.

[0022] In some examples, the first clamping portion includes at least one clamping post, the second clamping portion includes at least one clamping groove, and at least one clamping groove is correspondingly clamped with at least one clamping post. At least one clamping groove is arranged as a T-shaped groove, and at least one clamping post is arranged as a T-shaped post, and the T-shaped groove and the T-shaped post are clamped to restrict the movement of the junction box along the direction parallel to the supporting portion.

[0023] Based on the above embodiments of the present application, adopting the form of mutual clamping between the T-shaped clamping post and the T-shaped clamping groove can improve the clamping stability and guiding accuracy between the junction box and the housing at the same time, ensure the cooperation stability of the junction box before and during disassembly, and has a simple structure, is convenient for operation, and is beneficial to the smooth progress of the disassembly operation.

[0024] In some examples, there are at least two junction boxes, and the two junction boxes are oppositely arranged on both sides of the motor protection circuit breaker. There are two supporting parts, and the two supporting parts correspond to the two junction boxes one by one.

[0025] Alternatively, there is at least one junction box. The motor protection circuit breaker further includes another junction box fixedly connected to the circuit breaker and the contactor. The one junction box and the other junction box are oppositely arranged on both sides of the motor protection circuit breaker. There are two supporting parts, and the two supporting parts correspond to the one junction box and the other junction box one by one. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic diagram of the overall structure of the motor protection circuit breaker provided by the embodiment of the present application.

[0028] Figure 2 It is an exploded view of the motor protection circuit breaker provided by the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the cooperation structure between the junction box and the supporting part on the base provided by the embodiment of the present application.

[0030] Figure 4 Provided by the embodiment of the present application Figure 3 The enlarged view at A in

[0031] Figure 5 It is a schematic diagram of the structure of the base provided by the embodiment of the present application.

[0032] Figure 6 It is a schematic diagram of the structure of the junction box provided by the embodiment of the present application.

[0033] Figure 7 It is a schematic diagram of the cooperation structure between the junction box and the housing provided by the embodiment of the present application.

[0034] Figure 8 Provided by the embodiment of the present application Figure 7 The enlarged view at B in

[0035] Description of the Reference Numerals:

[0036] 100. Motor protection circuit breaker; 1. Circuit breaker; 11. Housing; 12. Second clamping part; 121 - Third part; 122 - Fourth part; 2. Contactor; 21. Base; 211. Support part; 2111. Disassembly through hole; 2112. Support plate; 2113. First limiting part; 22. Third limiting part; 221. Guide boss; 222. Groove; 3. Junction box; 31. Second limiting part; 32. Fourth limiting part; 321. Guide groove; 322. Projection; 33. First clamping part; 331 - First part; 332 - Second part; F1. Disassembly force; X. Support direction. Detailed implementation mode

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0039] It should be noted that: Similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is usually placed. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should also be noted that, unless otherwise clearly specified and defined, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] The motor protection circuit breaker includes components such as a circuit breaker, a contactor, and a junction box. The junction box is used to connect external wires and is usually detachably connected to the circuit breaker and the contactor. Users can disassemble, install, and replace the junction box according to actual usage conditions.

[0043] However, in the prior art, after the junction box is assembled to the circuit breaker and the contactor through various fixed connection structures, the assembly is too compact. A large force needs to be applied during the process of removing the junction box, and even methods such as prying are used. Such a removal process is likely to damage the junction box and even cause damage to both the circuit breaker and the contactor, affecting the overall structural stability and usage safety of the motor protection circuit breaker.

[0044] Based on this, the embodiments of the present application provide a motor protection circuit breaker, which can simplify the assembly structure of the junction box, facilitate the removal operation of the junction box, and reduce the risk of damage to other components caused by the removal operation.

[0045] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0046] Please refer to Figures 1 to 3 , this embodiment provides a motor protection circuit breaker 100, including a circuit breaker 1, a contactor 2, and at least one junction box 3. The circuit breaker 1 is fixedly connected to the contactor 2, and the junction box 3 is detachably connected to the circuit breaker 1 and the contactor 2. A support portion 211 is provided on the contactor 2, and a disassembly through hole 2111 is provided on the support portion 211. The support portion 211 is used to support the junction box 3. The force application direction of the junction box 3 during disassembly is the same as the support direction X of the support portion 211. The junction box 3 is in partial contact with the support portion 211, and the junction box 3 is not shielded at the disassembly through hole 2111.

[0047] The circuit breaker 1 in the motor protection circuit breaker 100 is mainly used to provide short - circuit protection, the contactor 2 is used for starting and stopping the motor, and the junction box 3 is used to cooperate with the contactor 2 to realize the connection with external wires. The motor protection circuit breaker 100 usually also includes a thermal relay, which is used to provide overload protection. The circuit breaker 1, the contactor 2, the junction box 3, and the thermal relay cooperate with each other to jointly realize the comprehensive protection of the motor.

[0048] Among them, with reference to Figure 1 , the circuit breaker 1 includes a housing 11, the contactor 2 includes a base 21, and the housing 11 and the base 21 are fixedly connected to form a load-bearing body. The junction box 3 is arranged on the outer side wall of the load-bearing body, and the junction box 3 can form a terminal with a wiring board extending out of the base 21, so as to realize the stable wiring of the contactor 2.

[0049] Furthermore, the junction box 3 is detachably connected to the load-bearing body, that is, the junction box 3 is detachably connected to the housing 11 and the base 21, which is convenient for disassembling, installing and replacing the junction box 3 according to the specific use situation. There are various connection forms between the junction box 3 and the load-bearing body, and correspondingly, there can be various disassembly methods. For example, for screw connection, just remove the screws during disassembly, or adopt snap connection, and just release the snap connection relationship during disassembly.

[0050] In the embodiment of the present application, with reference to Figures 1 to 3 , a support portion 211 is provided on the contactor 2. The support portion 211 is a part of the base 21 and is located on the outer side wall of the base 21. The support portion 211 is used to support the junction box 3, and the support direction X is the direction of the supporting force provided by the support portion 211 to the junction box 3.

[0051] The junction box 3 can be assembled to the housing 11 and the base 21 in a snap-fit manner. After the junction box 3 is snap-fitted to the housing 11 and the base 21 in the direction opposite to the support direction X, one side of the junction box 3 close to the support portion 211 abuts against the support portion 211. In this way, the support portion 211 can not only play a supporting role, but also block the external force acting on the junction box 3 along the support direction X to make the junction box 3 disengage.

[0052] A disassembly through hole 2111 is provided on the support portion 211. The setting of the disassembly through hole 2111 facilitates the disassembly operation of the junction box 3. During the process of disassembling the junction box 3, the disassembly force F1 applied to the junction box 3 can directly act on the side of the junction box 3 abutting against the support portion 211 under the avoidance of the disassembly through hole 2111. At this time, the direction of the disassembly force F1 is the same as the support direction X, so that the junction box 3 can be smoothly separated from the support portion 211 to complete the subsequent disassembly operation.

[0053] Based on the above embodiments of the present application, by providing a disassembly through-hole 2111 on the support portion 211, it is convenient to apply a disassembly force F1 to the junction box 3 in the support direction X without affecting the support function of the support portion 211 on the junction box 3, which is beneficial to simplifying the disassembly operation of the junction box 3 and improving the disassembly efficiency. At the same time, the avoidance of the disassembly through-hole 2111 on the support portion 211 for the junction box 3 is beneficial to reducing the possibility of damaging other components of the motor protection circuit breaker 100 during the removal process and improving the overall structural stability of the motor protection circuit breaker 100.

[0054] Referring to Figure 1 and Figure 2 , in one embodiment, at least one junction box 3 is provided as one, and the motor protection circuit breaker 100 further includes another junction box 3 fixedly connected to the circuit breaker 1 and the contactor 2. One junction box 3 and the other junction box 3 are oppositely arranged on both sides of the motor protection circuit breaker 100. Two support portions 211 are provided, and the two support portions 211 correspond to one junction box 3 and the other junction box 3 one by one.

[0055] It should be noted that at least one junction box 3 refers to the junction box 3 that can be disassembled and replaced relative to the motor protector. And the other junction box 3 refers to the junction box 3 fixedly connected to the circuit breaker 1 and the contactor 2, which forms an integral whole with the circuit breaker 1 and the contactor 2 and does not need to be disassembled and replaced.

[0056] In this setting form, two support portions 211 are correspondingly provided, and the two support portions 211 correspondingly support these two types of junction boxes 3. A disassembly through-hole 2111 is provided on the support portion 211 corresponding to at least one junction box 3, and when disassembling and replacing at least one junction box 3, disassembly can be performed through the disassembly through-hole 2111. And the support portion 211 corresponding to the other junction box 3 may not be provided with a disassembly through-hole 2111, and such a setting can prevent the user from damaging the motor protection circuit breaker 100 by wrongly disassembling the junction box 3.

[0057] Referring to Figure 1 and Figure 2 , in another embodiment, at least one junction box 3 is provided with two, and the two junction boxes 3 are oppositely arranged on both sides of the motor protection circuit breaker 100. Two support portions 211 are provided, and the two support portions 211 correspond to the two junction boxes 3 one by one.

[0058] At least one junction box 3 is provided with two, that is, both of the two junction boxes 3 are detachable. The two junction boxes 3 are oppositely arranged on both sides of the motor protection circuit breaker 100, and the two junction boxes 3 respectively correspond to the incoming line end and the outgoing line end of the motor protection circuit breaker 100. Such a setting is convenient for wiring and can also improve the safety of the electrical system.

[0059] There are two corresponding support parts 211, and disassembly through holes 2111 are provided on both of the two support parts 211, so that both of the two junction boxes 3 can be disassembled through the disassembly through holes 2111 on the corresponding support parts 211.

[0060] Of course, there can be more than two junction boxes 3, which respectively correspond to different wiring positions, and the support parts 211 and the junction boxes 3 are arranged in one-to-one correspondence, so that each junction box 3 can achieve the above disassembly method.

[0061] Refer to Figure 2 and Figure 3 In some examples, the support part 211 includes a tray 2112, and at least one disassembly through hole 2111 is provided on the tray 2112.

[0062] The tray 2112 is arranged on the side wall of the base 21 as a plate-like structure, and the tray 2112 is perpendicular to the side wall of the base 21. The setting position of the tray 2112 is on the assembly path of the junction box 3. When the junction box 3 is assembled to the base 21, one side of the junction box 3 close to the tray 2112 can abut against the surface of the tray 2112 perpendicular to the side wall of the base 21. At this time, the junction box 3 and the base 21 are assembled, and the tray 2112 can support the junction box 3, and the structure is simple, which is convenient for opening the disassembly through hole 2111 and has little influence on the disassembly operation of the junction box 3.

[0063] At least one disassembly through hole 2111 is opened on the tray 2112. When there is one disassembly through hole 2111, the disassembly force F1 on the junction box 3 can act on one side of the junction box 3 abutting against the tray 2112 only through this one disassembly through hole 2111, and the disassembly force F1 is relatively concentrated.

[0064] When there are two disassembly through holes 2111, the two disassembly through holes 2111 are arranged at intervals on the tray 2112. In this way, the disassembly force F1 can be applied to the junction box 3 from two points, and the disassembly force F1 is distributed more evenly, which is beneficial to improving the stability of the disassembly process and reducing the risk of damage to the junction box 3 caused by uneven force.

[0065] Based on the above embodiments of the present application, the support part 211 is set as the tray 2112. The structure of the tray 2112 is relatively simple, which is convenient for opening the disassembly through hole 2111 and has little influence on the disassembly operation of the junction box 3. At the same time, increasing the number of disassembly through holes 2111 opened on the tray 2112 helps to disperse the disassembly force F1 received by the junction box 3, thereby contributing to the smooth progress of the disassembly process.

[0066] In an alternative embodiment, the number of the disassembly through-holes 2111 provided may be one or more. In the embodiment of the present application, two disassembly through-holes 2111 are provided, and the two disassembly through-holes 2111 are arranged at intervals on a pallet 2112. The number may also be set to 3, 4 or the like, so as to cooperate with multiple fingers to directly apply a disassembly acting force F1 to the junction box 3. The embodiment of the present application does not further limit the number of the disassembly through-holes 2111.

[0067] Exemplarily, the supporting part 211 includes a plurality of pallets 2112, and the gap between the plurality of pallets 2112 is the disassembly through-hole 2111.

[0068] Based on the above embodiments of the present application, taking the gap between the plurality of pallets 2112 arranged at intervals as the disassembly through-hole 2111 can not only facilitate directly applying the disassembly acting force F1 to the junction box 3 through the gap between the adjacent pallets 2112 while meeting the support condition, but also reduce the processing procedures of the disassembly through-hole 2111 and simplify the structure of the base 21.

[0069] Exemplarily, two pallets 2112 are arranged on the side wall of the base 21, the two pallets 2112 are arranged at intervals and the support surfaces of the two pallets 2112 for the junction box 3 are in the same plane. The gap between the two pallets 2112 forms the disassembly through-hole 2111, and the disassembly acting force F1 for disassembling the junction box 3 can directly act on one side of the junction box 3 abutting against the two pallets 2112 through the disassembly through-hole 2111, which is also convenient for realizing the disassembly of the junction box 3.

[0070] Refer to Figure 2 and Figure 3 , in some examples, the disassembly through-hole 2111 is set as a U-shaped through-hole.

[0071] Setting the disassembly through-hole 2111 as a U-shaped through-hole, the U-shaped through-hole is located at the edge of the supporting part 211, that is, at the edge of the pallet 2112. The U-shaped through-hole not only communicates with both sides of the supporting part 211 facing away from the junction box 3 and close to the junction box 3, but also can play an avoidance role at the edge of the pallet 2112. Whether the U-shaped through-hole is formed on the pallet 2112 or formed between two pallets 2112 arranged at intervals, it has the advantage of facilitating the disassembly operation.

[0072] Based on the above embodiments of the present application, setting the disassembly through-hole 2111 as a U-shaped through-hole can further simplify the disassembly operation of the junction box 3, is beneficial to improving the disassembly efficiency, and is beneficial to reducing the influence of the disassembly operation on other components of the motor protection circuit breaker 100, and the operation safety is higher.

[0073] Exemplarily, a tray 2112 is provided on the side wall of the base 21. Two U-shaped disassembly through holes 2111 are provided on the tray 2112 at intervals. When operating to disassemble the junction box 3, the operator can directly insert the index finger and middle finger into the U-shaped disassembly through holes 2111, and then apply a disassembly force F1 to the junction box 3 along the support direction X of the tray 2112 for the junction box 3, so as to drive the junction box 3 to move along the support direction X at the same time, to separate the junction box 3 from the tray 2112. At this time, the U-shaped disassembly through holes 2111 will not affect the movement of the index finger and middle finger, effectively improving the convenience and efficiency of the disassembly operation. At the same time, adopting this disassembly method can effectively reduce the risk of damaging other components of the motor protection circuit breaker 100, and the disassembly process is safer.

[0074] In an alternative embodiment, the disassembly through holes 2111 can also be set to other shapes, such as circular, square or polygonal, etc.

[0075] Referring to Figure 3 and Figure 4 , in some examples, a first limiting portion 2113 is further provided on the supporting portion 211, and a second limiting portion 31 is provided on the junction box 3. The first limiting portion 2113 and the second limiting portion 31 can be mutually limited along a direction parallel to the supporting portion 211.

[0076] Based on the above embodiments of the present application, the cooperation of the first limiting portion 2113 and the second limiting portion 31 can limit the assembly direction and disassembly direction of the junction box 3, ensuring that when the disassembly force F1 applied to the junction box 3 through the disassembly through holes 2111 is received by the junction box 3, the moving direction of the junction box 3 is consistent with the force receiving direction, preventing the situation that the junction box 3 is separated from other directions due to the action force in other directions during the process of disassembling the junction box 3, and reducing the risk of damage to the junction box 3 and other components of the motor protection circuit breaker 100.

[0077] Specifically, the first limiting portion 2113 is set as a limiting groove, and the limiting groove is a structure opened on the surface of the supporting portion 211 and is located on the side of the supporting portion 211 close to the junction box 3. The opening position of the limiting groove is spaced from the opening position of the disassembly through holes 2111, that is, the supporting portion 211 has the functions of support, limitation and convenient disassembly at the same time.

[0078] The second limiting portion 31 is set as a limiting boss, and the limiting boss is a structure protruding 322 from the surface of the junction box 3. The limiting boss is located on the side of the junction box 3 abutting against the supporting portion 211, and the limiting boss correspondingly lies in the limiting groove, so as to limit the movement of the junction box 3 in the direction parallel to the supporting portion 211.

[0079] Furthermore, referring to Figure 4, the limiting groove is set as a U-shaped groove, and the limiting boss is set as a U-shaped boss. The U-shaped groove is opened on the surface of the support plate 2112 for supporting the junction box 3, and the U-shaped boss protrudes 322 from the surface where the junction box 3 abuts against the support plate 2112. The U-shaped boss is correspondingly inserted into the U-shaped groove, which can play a limiting role, and the stability and accuracy of the limit are relatively high. Moreover, using such a structure for limiting can restrict the movement of the junction box 3 in multiple directions, so that the junction box 3 can only move along the axis of the U-shaped groove, that is, during the process of separating the junction box 3 from the support plate 2112, the junction box 3 can only move in a direction perpendicular to the support plate 2112.

[0080] Among them, the axis of the U-shaped groove is the same as the axis direction of the disassembly through hole 2111, that is, when the disassembly acting force F1 acts on the junction box 3 through the disassembly through hole 2111, the disassembly direction of the junction box 3 is the same as the direction in which the first limiting part 2113 and the second limiting part 31 are released from the limit. This can ensure that the junction box 3 will not easily break away from other directions during the disassembly process, which is beneficial to improving the stability of the disassembly process and can reduce the impact on other components of the motor protection circuit breaker 100.

[0081] It should be noted that the first limiting part 2113 and the second limiting part 31 can also adopt other structures to achieve the limiting cooperation. For example, the cooperation of a limiting column and a shaft hole. It is also possible to swap the first limiting part 2113 and the second limiting part 31, that is, a limiting boss is provided on the support part 211, and a limiting groove is provided on the junction box 3.

[0082] Among them, the limiting groove and the limiting boss can also be set to other shapes, as long as the direction in which the two are released from the limit is the same as the disassembly direction of the junction box 3.

[0083] In addition, multiple limiting grooves can be provided. The positions of the multiple limiting grooves on the support part 211 are different, corresponding to different installation positions of the junction box 3, and can also correspond to different specifications of the junction box 3. For example, in this embodiment, two groups of limiting grooves are provided. The two groups of limiting grooves are arranged at intervals on the support plate 2112, and the junction box 3 can be limited corresponding to one group or two groups according to requirements.

[0084] Refer to Figure 5 and Figure 6 , in some examples, a support part 211 and a third limiting part 22 are provided on the same side wall of the base 21 of the contactor 2. The third limiting part 22 is arranged along a direction perpendicular to the support part 211. A fourth limiting part 32 is also provided on the junction box 3. The third limiting part 22 and the fourth limiting part 32 can be mutually limited along a direction perpendicular to the support part 211.

[0085] Based on the above embodiments of the present application, the mutual cooperation between the third limiting portion 22 and the fourth limiting portion 32 can also play a role in restricting the disassembly direction of the junction box 3, ensuring that when the disassembly force F1 applied to the junction box 3 through the disassembly through hole 2111 acts on the junction box 3, the moving direction of the junction box 3 is consistent with the force application direction, preventing the situation that the junction box 3 separates from other directions due to the action of forces in other directions during the disassembly process of the junction box 3, and reducing the risk of damage to the junction box 3 and other components of the motor protection circuit breaker 100.

[0086] The form of the cooperation between the third limiting portion 22 and the fourth limiting portion 32 can, together with the first limiting portion 2113 and the second limiting portion 31, further restrict the disassembly direction of the junction box 3, which is beneficial to improving the accuracy and reliability of the disassembly process and ensuring that the junction box 3 can be stably removed.

[0087] Among them, the third limiting portion 22 and the supporting portion 211 are located on the same side wall of the base 21, the fourth limiting portion 32 is arranged on one side of the side wall of the junction box 3 that abuts against the base 21, and the fourth limiting portion 32 and the third limiting portion 22 are mutually limited in the direction perpendicular to the supporting portion 211, that is, the disassembly direction of the junction box 3 is limited to only the direction perpendicular to the supporting portion 211, which is also the direction of the supporting force provided by the supporting portion 211 to the junction box 3, and further the same as the direction of the disassembly force F1 directly applied to the junction box 3 through the disassembly through hole 2111. In this way, the limit can be smoothly released and the disassembly can be completed under the action of the disassembly force F1.

[0088] Refer to Figure 5 and Figure 6 In some examples, the third limiting portion 22 includes at least one guiding boss 221, a groove 222 is provided on the guiding boss 221, the fourth limiting portion 32 includes at least one guiding groove 321, and a protrusion 322 is provided in the guiding groove 321, and the protrusion 322 is correspondingly clamped with the groove 222.

[0089] Based on the above embodiments of the present application, the mutual cooperation between the guiding boss 221 and the guiding groove 321 can play a guiding role during the disassembly process of the junction box 3, improving the accuracy of the disassembly process. The clamping of the groove 222 on the guiding boss 221 and the protrusion 322 in the guiding groove 321 can play a role in restricting the movement of the junction box 3, avoiding the movement of the junction box 3 under the action of partial forces during the non-disassembly process, and reducing the possibility of misoperation.

[0090] Specifically, the guiding bosses 221 in the third limiting portion 22 are arranged on the side wall of the base 21 in the direction perpendicular to the supporting portion 211, and a groove 222 is provided at the top of the guiding boss 221. In this way, the third limiting portion 22 can not only play a guiding role, but also play a role in limiting and fixing.

[0091] The guiding groove 321 in the fourth limiting part 32 is opened on one side of the junction box 3 close to the side wall of the base 21. A protrusion 322 is arranged at the bottom of the guiding groove 321. The guiding boss 221 of the third limiting part 22 is correspondingly located in the guiding groove 321 of the fourth limiting part 32, which can guide the movement of the junction box 3 and prevent the junction box 3 from moving in other directions during the disassembly process.

[0092] Among them, the protrusion 322 is set as an arc-shaped protrusion 322 with a smaller arc, and the groove 222 is set as a matching arc-shaped groove 222. The two can be clamped with each other to fix the position of the junction box 3. During the process of disassembling the junction box 3, only by increasing the disassembly force F1 can the protrusion 322 be separated from the groove 222, thus facilitating the completion of the disassembly operation.

[0093] Refer to Figure 6 and Figure 7 In some examples, a first clamping part 33 is arranged on the junction box 3. The arrangement direction of the first clamping part 33 is parallel to that of the supporting part 211. A second clamping part 12 is arranged on the circuit breaker 1. The first clamping part 33 and the second clamping part 12 can be clamped with each other along the direction parallel to the supporting part 211.

[0094] Based on the above embodiments of the present application, the settings of the first clamping part 33 and the second clamping part 12 can cooperate to clamp the junction box 3 and the housing 11 of the circuit breaker 1, thereby restricting the relative movement between the junction box 3 and the housing 11. The first clamping part 33 and the second clamping part 12 can cooperate with the supporting part 211 arranged on the base 21, which is beneficial to improving the accuracy and reliability of the disassembly process when disassembling the junction box 3.

[0095] Among them, the arrangement direction of the first clamping part 33 is parallel to that of the supporting part 211, that is, the first clamping part 33 is arranged on the side of the junction box 3 close to the supporting part 211 of the base 21, and the first clamping part 33 is arranged parallel to the supporting part 211. The second clamping part 12 is arranged on the housing 11 of the circuit breaker 1 and is on the same side of the motor protection circuit breaker 100 as the supporting part 211, so as to cooperate with the supporting part 211 to limit the junction box 3.

[0096] The first clamping part 33 and the second clamping part 12 are clamped with each other in the direction parallel to the supporting part 211, which can limit the movement of the junction box 3 along the direction parallel to the supporting part 211, so that the junction box 3 can only move along the direction perpendicular to the supporting part 211 to correspond to the direction of the disassembly force F1, thus facilitating the disassembly of the junction box 3.

[0097] Refer to Figure 7 and Figure 8, in some examples, the first clamping portion 33 includes at least one clamping post, the second clamping portion 12 includes at least one clamping groove, and at least one clamping groove is in one-to-one correspondence with at least one clamping post for clamping connection. At least one clamping groove is arranged as a T-shaped groove, and at least one clamping post is arranged as a T-shaped post. The T-shaped groove and the T-shaped post are clamped to limit the movement of the junction box 3 in a direction parallel to the support portion 211.

[0098] Based on the above embodiments of the present application, adopting the form of mutual clamping of the T-shaped clamping post and the T-shaped clamping groove can improve the clamping stability and guiding accuracy between the junction box 3 and the housing 11 at the same time, ensure the mating stability of the junction box 3 before and during disassembly, and has a simple structure, is easy to operate, and is conducive to the smooth progress of the disassembly operation.

[0099] Specifically, the clamping post is the protruding part 322 on the junction box 3. The clamping post is located on the side wall of the junction box 3 abutting against the housing 11 and on the same side as the fourth limiting portion 32, while the fourth limiting portion 32 is used to cooperate with the base 21 of the contactor 2 part, and the clamping post is used to cooperate with the housing 11 of the circuit breaker 1 part.

[0100] The clamping groove is a groove opened on the housing 11. The clamping groove is located on the side wall of the housing 11 abutting against the junction box 3, and the clamping groove, the support portion 211 provided on the base 21 of the contactor 2, and the third limiting portion 22 are on the same side of the motor protection circuit breaker 100.

[0101] Further, referring to Figure 8 , the T-shaped clamping post is divided into two parts. The first part is the head of the T-shape, i.e., the transverse structure. The second part is the leg of the T-shape, i.e., the vertical structure. Among them, the second part is connected to the side wall of the junction box 3 and perpendicular to the side wall of the junction box 3, and the first part is located at one end of the second part away from the junction box 3.

[0102] Correspondingly, referring to Figure 8 , the T-shaped clamping groove is also divided into two parts. The third part is the head of the T-shape, i.e., the transverse groove. The fourth part is the leg of the T-shape, i.e., the vertical groove. The third part is communicated with the fourth part. The fourth part is located on the side close to the junction box 3, and the third part is located on the side away from the junction box 3.

[0103] The first part of the T-shaped clamping post is in corresponding clamping connection with the first part of the T-shaped clamping groove, and the second part of the T-shaped clamping post is in corresponding clamping connection with the second part of the T-shaped clamping groove, so as to achieve a stable limiting and clamping effect.

[0104] The opening of the T-shaped clamping groove faces away from the base 21 of the housing 11. During the process of disassembling the junction box 3, the junction box 3 moves towards the side of the housing 11 away from the base 21 under the disassembly force F1, that is, moves along the support direction X, so that the clamping post can slide along the clamping groove and slide out from the opening of the clamping groove, thus completing the disassembly of the junction box 3 from the housing 11. The structure is simple and the operation is convenient.

[0105] In an alternative embodiment, a plurality of clamping posts may be provided, and the number of clamping grooves corresponds to the clamping posts, which can further improve the accuracy of the fit. In addition, the clamping posts and the clamping grooves may also be provided in other shapes, such as L-shaped, which can also achieve the functions of the foregoing shapes and have the same technical effects, and will not be elaborated herein.

[0106] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A motor protection circuit breaker, characterized in that, It includes a circuit breaker, a contactor and at least one junction box. The circuit breaker is fixedly connected to the contactor, and the junction box is detachably connected to the circuit breaker and the contactor; A support part is arranged on the contactor, a disassembly through hole is arranged on the support part, and the support part is used for supporting the junction box; The force application direction of the junction box during disassembly is the same as the support direction of the support part; The junction box is in partial contact with the support part, and the junction box is not shielded at the disassembly through hole.

2. The motor protection circuit breaker according to claim 1, characterized in that, The support part includes a pallet, and at least one of the disassembly through holes is arranged on the pallet.

3. The motor protection circuit breaker according to claim 1, wherein, The support part includes a plurality of pallets, and the gap between the plurality of pallets is the disassembly through hole.

4. The motor protection circuit breaker according to any one of claims 1 to 3, characterized in that, The disassembly through hole is arranged as a U-shaped through hole.

5. The motor protection circuit breaker according to any one of claims 1-3, characterized in that, A first limiting part is further arranged on the support part, a second limiting part is arranged on the junction box, and the first limiting part and the second limiting part can be mutually limited along the direction parallel to the support part.

6. The motor protection circuit breaker according to any one of claims 1 to 3, characterized in that, The support part and a third limiting part are arranged on the same side wall of the base of the contactor, the third limiting part is arranged along the direction perpendicular to the support part, a fourth limiting part is further arranged on the junction box, and the third limiting part and the fourth limiting part can be mutually limited along the direction perpendicular to the support part.

7. The motor protection circuit breaker according to claim 6, characterized in that, The third limiting part includes at least one guiding boss, a groove is arranged on the guiding boss, the fourth limiting part includes at least one guiding groove, a protrusion is arranged in the guiding groove, and the protrusion is correspondingly clamped with the groove.

8. The motor protection circuit breaker according to any one of claims 1 to 3, characterized in that, A first clamping part is arranged on the junction box, the arrangement direction of the first clamping part is parallel to that of the support part, a second clamping part is arranged on the circuit breaker, and the first clamping part and the second clamping part can be mutually clamped along the direction parallel to the support part.

9. The motor protection circuit breaker according to claim 8, characterized in that, The first clamping part includes at least one clamping post, the second clamping part includes at least one clamping groove, and the at least one clamping groove is correspondingly clamped with the at least one clamping post one by one; The at least one clamping groove is arranged as a T-shaped groove, the at least one clamping post is arranged as a T-shaped post, and the T-shaped groove is clamped with the T-shaped post to limit the movement of the junction box along the direction parallel to the support part.

10. The motor protection circuit breaker according to any one of claims 1-3, characterized in that, There are two of the at least one junction box, and the two junction boxes are oppositely arranged on both sides of the motor protection circuit breaker. There are two support parts, and the two support parts correspond to the two junction boxes one by one; Alternatively, there is one of the at least one junction box, and the motor protection circuit breaker further includes another junction box fixedly connected to the circuit breaker and the contactor. One junction box and the other junction box are oppositely arranged on both sides of the motor protection circuit breaker. There are two support parts, and the two support parts correspond to one junction box and the other junction box one by one.

Images