Tripping device fixing device and circuit breaker

Abstract

The invention is a kind of tripping device fixing device, which comprises a tripping device base and a cover, and a tripping device body is installed on the tripping device base, characterized in that it further comprises a bracket, the bracket is installed on the cover, the front part of the tripping device base is fixed with the bracket, and the rear end of the tripping device base is fixed with the cover through buckling. The invention ensures the fixing reliability of the tripping device by increasing a bracket to cooperate with the tripping device base without increasing the size of the space, reduces the scrap rate of the cover parts, and the bracket also has a wiring function, so that a separate wiring groove is not needed, and the number of parts is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of molded case circuit breaker, in particular to a fixed device for a trip unit of a circuit breaker. BACKGROUND

[0002] The existing molded case circuit breaker base part adopts thermosetting material, and screws are usually used for connecting and fixing other structures on the base. There are two types, one is to preset an embedded nut and use a combination screw for fixing, which is relatively reliable and does not affect the installation effect after multiple disassembly. The disadvantage is that the manufacturing cost is increased, and it is limited by space, which has certain requirements for the thickness of the shell. In the said occasion, the nut cannot be arranged. The second way is to reserve screw holes on the base, and use self-tapping screws to fix the required parts. The advantage is that the structure is simple, and the manufacturing and production cost is low. The disadvantage is that the thermosetting material is easy to wear, the equipment cannot be repeatedly installed during inspection, and multiple assembly can easily damage the screw hole and cause installation failure, affecting the use of the product.

[0003] There are a large number of output or control wire harnesses in the electronic product mutual inductor and trip unit part, and there is usually a lack of standardized wiring during layout, which causes the wire harness connected with the controller to be messy, and the wire is easy to be damaged during installation, causing functional damage or other problems. SUMMARY

[0004] In view of the problems existing in the prior art, the application aims to provide a fixed device to improve the fixing structure of the trip unit, increase the wiring device, simplify the overall structure and the number of parts of the trip unit part, and improve the installation and use reliability. Simplify the structure of the thermosetting part and improve its use reliability.

[0005] To achieve the above-mentioned purpose, the application provides a trip unit fixing device including a trip unit base and a cover, and the trip unit body is installed on the trip unit base. Its characteristic is that it further includes a bracket, the bracket is installed on the cover, the front part of the trip unit base is fixed with the bracket, and the rear end bottom of the trip unit base is fixed with the cover through buckling.

[0006] The front part of the trip unit base is provided with a mounting hole, the trip unit base is installed on the bracket through the mounting hole, and the front part of the trip unit base is provided with a limiting surface matched with the bracket. The rear part of the trip unit base is provided with a hook, and the limiting hook is buckled with the clamping groove on the cover.

[0007] The bracket includes a bracket front part and a bracket rear part, the bracket front part is a flat plate structure, the bracket rear part is a groove structure, the bracket front part is provided with at least two mounting holes, the bracket rear part is provided with a fixing hole, and the bracket is installed on the cover through the mounting hole and the fixing hole.

[0008] The back of the mounting hole is provided with a groove, and the groove is matched with a boss provided on the cover.

[0009] The top of the front part of the bracket is provided with a first groove, and the side of the front part of the bracket is provided with a second groove, and the first groove and the second groove form a first channel.

[0010] The end of the front part of the bracket is provided with an elastic buckle for cooperating with a limiting surface of the tripping device base.

[0011] The rear part of the bracket includes a side wall and a bottom groove, and the rear part of the bracket and the side wall of the cover form a second channel.

[0012] The side edge is provided with at least two limiting bosses in the length direction.

[0013] The rear part of the tripping device base and the other side edge of the cover form a third channel.

[0014] Another purpose of the present application is to provide a circuit breaker comprising the above-mentioned tripping device fixing device.

[0015] Compared with the prior art, the tripping device fixing device of the present application has the following technical effects:

[0016] 1. The bracket cooperates with the tripping device base to ensure the reliability of the tripping device, and this reliability can be repeatedly ensured.

[0017] 2. The bracket can fix the tripping device and has wiring function, without the need to separately increase a wiring groove, thereby reducing the number of parts.

[0018] 3. The bracket is a separate part, and various forming processes can be selected, which is convenient for designing complex structural features and transferring part of the original functions of the cover. The structure and shape requirements of the cover are simplified, a simpler process is facilitated, and the mold and manufacturing costs are reduced.

[0019] 4. The bracket is installed at one time, and the remaining parts are connected with the bracket, thereby reducing the scrap rate of the cover parts. Since the cover is mostly made of thermosetting material and cannot be recycled, this design reduces resource waste and meets the current environmental protection trend. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a three-dimensional schematic view of the tripping device installation in one embodiment of the present application;

[0021] Figure 2 is a top view schematic view of the tripping device installation in one embodiment of the present application;

[0022] Figure 3 is Figure 2 A-A sectional view;

[0023] Figure 4 For Figure 3 Local enlarged view at A in Figure 1;

[0024] Figure 5 For the bracket structure schematic diagram in one embodiment of the present application;

[0025] Figure 6 For the schematic diagram of the tripping device base structure in one embodiment of the present application;

[0026] Figure 7 For the schematic diagram of the tripping device base structure in one embodiment of the present application;

[0027] Figure 8 For the schematic diagram of the tripping device base structure in one embodiment of the present application;

[0028] Serial number:

[0029] 1-cover, 2-bracket, 3-tripping device body, 4-tripping device base, 5-first channel, 6-second channel, 7-third channel, 11-slot, 21-bracket front, 22-bracket rear, 23-elastic buckle, 24-mounting hole, 25-fixing hole, 26-limiting boss, 27-groove, 28-mounting hole, 31-side wall, 32-bottom slot, 41-limiting surface, 42-mounting hole, 43-claw, 51-first groove, 52-second groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] As Figures 1-4As shown, the tripping device fixing device in one embodiment of the present application comprises a bracket 2, a cover 1 and a tripping device base 4. The tripping device body is mounted on the tripping device base 4, and the bracket 2 is mounted on the upper part of the cover 1 and fixed with the cover 1 by screws. The tripping device base 4 is placed on the cover 1 and the bracket 2, the front part of the tripping device base 4 is fixed with the bracket 2 by screws and elastic buckles 23, the bottom of the rear end of the tripping device base 4 is buckled with the cover 1 by a hook 43, and the rear end and the left side of the tripping device base 4 are limited by the cover 1. In the present application, the bracket 2 for fixing the tripping device is a separate part, the bracket 2 is mounted with the cover 1, and the remaining parts are fixed directly or indirectly through the bracket 2, the bracket 2 and the tripping device base 4 are fixed by buckles and screws, and the tripping device base 4 and the cover 1 are fixed by a hook and a slot, thereby reducing the scrap rate of the cover part.

[0032] As shown in the figure, Figures 4-5 The bracket 2 comprises a bracket front part 21 and a bracket rear part 22, the bracket front part 21 is a flat plate structure, and each corner of the bracket front part 21 is provided with a mounting hole 28, a recess 27 is arranged at the back of the mounting hole 28, the recess 27 at the bottom of the bracket 2 cooperates with the boss of the cover 1 to support and limit. The end of the bracket front part 21 of the bracket 2 is provided with an elastic buckle 23 for cooperating with the limiting surface of the front end of the tripping device base 4 for mounting, and the top of the elastic buckle 23 adopts a stepped structure to facilitate tool operation and installation and disassembly. The bracket rear part 22 is a groove structure, which comprises a side wall 31 and a bottom groove 32, and the end of the bottom groove 32 is provided with a fixing hole 25 for fixing the bracket 2 on the cover 1 by using self-tapping screws, and three limiting bosses 26 are arranged on the side wall 31 along the length direction of the side wall 31. In the present application, the side wall 31 can also be provided with two limiting bosses 26, or four or more limiting bosses 26. The side of the groove structure is provided with a mounting hole 24 for fixing and mounting the tripping device base 4.

[0033] The top of the bracket front part 21 is provided with a first recess 51, and the side of the bracket front part 21 is provided with a second recess 52, and the first recess 51 and the second recess 52 form a first channel 5. In the present application, the side wall 31, the limiting boss 26 and the bottom groove 32 of the bracket 2 and one side of the cover 1 form a semi-closed structure to form a second channel 6, which can accommodate a certain number and cross-section of wire harnesses (not shown in the figure). The limiting boss 26 structure can play a limiting role, so that the wire harnesses can be reliably installed in the groove structure. There is a gap between the limiting boss 26 and one side of the cover 1, which allows the wire harnesses to be put in and taken out, and ensures that they are not easily dropped out.

[0034] As shown in the figure, Figures 6-7As shown, the front part of the tripping device base 4 is provided with a limiting surface 41 matched with the elastic buckle 23 and a mounting hole 42. The rear part of the tripping device base 4 is provided with a hook 43 matched with the clamping groove 11 on the cover 1. The overlapping part of the tripping device base 4 and the bracket 2 forms a closed area after installation, which limits the internal wire harness. The rear part of the tripping device base 4 and the other side edge of the cover 1 form a third channel 7. The first channel 5, the second channel 6 and the third channel 7 form a wire harness arrangement space.

[0035] The installation process of the bracket 2 in the present application is as follows: first, place the bracket 2 on the cover 1, and then match the groove 27 at the bottom of the bracket 2 with the boss on the cover 1 to limit and position, match the slot structure of the bracket 2 with the side edge of the cover 1, and then fix the bracket 2 and the cover 1 by using screws after installation, and finally complete the installation operation of the bracket 2.

[0036] The wire harness arrangement process is as follows: arrange the wire harness along the groove area of the first channel 5, arrange the wire harness into the second channel 6 formed by the slot structure through the gap between the limiting boss and the cover 1 in the second channel 6 area, complete the arrangement in the second channel 6, and arrange the wire harness into the third channel 7 formed by the tripping device base 4 and the cover 1 at the position of the limiting boss at the end of the slot structure, and thus complete the installation of the wire harness.

[0037] The installation process of the tripping device base 4 is as follows: place the tripping device base 4 on the cover 1, and then make the rear end and the side edge of the tripping device base 4 contact with the cover 1, and make the hook 43 of the tripping device base 4 match with the clamping groove 11 on the cover 1. Push the elastic buckle 23 on the bracket 2 to push the limiting surface of the tripping device base 4 into the elastic buckle 23, and release the elastic buckle 23 to the limiting surface 41 of the tripping device base 4. Fix the tripping device base 4 by using screws at the position of the mounting hole 42 on the tripping device base 4, and thus complete the installation operation of the tripping device base 4. According to the reverse steps, remove the screws on the tripping device base 4, push the limiting surface of the elastic buckle 23 on the bracket 2 to release the limiting surface 41 of the tripping device base 4, and thus complete the disassembly of the tripping device base 4.

[0038] The specific examples in the present application are used to illustrate the principles and implementation modes of the present application. The above examples are only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation modes and application ranges can be changed according to the idea of the present application. In summary, the content of the present application should not be understood as a limitation of the present application.

Claims

1. A trip unit mounting arrangement comprising a trip unit base and a cover, a trip unit body mounted to the trip unit base, characterised in that, The device further comprises a bracket, which is mounted on the cover, the front part of the tripping device base is fixed with the bracket, and the rear end of the tripping device base is fixed with the cover through buckling; The front part of the tripping device base is provided with a mounting hole, the tripping device base is mounted on the bracket through the mounting hole, the front part of the tripping device base is further provided with a limiting surface matched with the bracket, the rear part of the tripping device base is provided with a hook, and the hook is buckled with a clamping groove on the cover; The bracket comprises a bracket front part and a bracket rear part, the bracket front part is a flat plate structure, the bracket rear part is a groove structure, the bracket front part is provided with at least two mounting holes, the bracket rear part is provided with a fixing hole, and the bracket is mounted on the cover through the mounting hole and the fixing hole.

2. The trip unit mounting arrangement of claim 1, wherein The back part of the mounting hole is correspondingly provided with a groove, and the groove is matched with a boss provided on the cover.

3. The tripper mounting arrangement of claim 1 wherein, The top of the bracket front part is provided with a first groove, the side edge of the bracket front part is provided with a second groove, and the first groove and the second groove form a first channel.

4. The tripper mounting arrangement of claim 2 wherein, The end of the bracket front part is provided with an elastic buckle for matching with the limiting surface of the tripping device base.

5. The tripper mounting arrangement of claim 1 wherein, The bracket rear part comprises a side wall and a bottom groove, and the bracket rear part and the side wall of the cover form a second channel.

6. The tripper mounting arrangement of claim 3 wherein, The side edge is provided with at least two limiting bosses along the length direction.

7. The tripper mounting arrangement of claim 1 wherein, The rear part of the tripping device base and the other side edge of the cover form a third channel.

8. A circuit breaker characterized by, The device further comprises the tripping device fixing device according to any one of claims 1 to 7. The device further comprises the tripping device fixing device according to any one of claims 1 to 7.

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