Thermomagnetic adjustable tripping device and molded case circuit breaker
By designing the matching structure of the lever bracket, the thermally adjustable rod, the magnetically adjustable rod and the tripping rod in the thermomagnetic adjustable tripping device, the problems of poor stability and insufficient adjustability of the existing device are solved, and better Assembled convenience and stability, as well as large angle adjustability.
Patent Information
- Application Number
- CN202420456576.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-11
AI Technical Summary
The existing thermal magnetic double adjustable tripping device has poor stability and is inconvenient to assemble in plastic case circuit breakers, and the adjustable knob is insufficient.
A thermal magnetic adjustable tripping device is designed, including a lever bracket, a thermal adjustable rod, a magnetic adjustable rod and a tripping rod. By setting up a engaging slot, a choke block, a positioning slot, a slot and a hook, etc., it realizes the The lever bracket and the magnetic adjustable rod are stable in combination, the thermal adjustable knob and magnetic adjustable knob are adjusted at a large angle, and the hooks on the magnetic adjustable rod are square structured to facilitate mating with the hook spring.
It improves the assembly convenience and stability of the tripping device, increases the adjustable angle of the magnetically adjustable knob and the thermally adjustable knob for ease of use, and improves stability through the cooperation of the square hook and the hook spring.
Smart Images
Figure CN222260940U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of molded case circuit breakers, and in particular relates to a thermal magnetic adjustable tripping device and a molded case circuit breaker. Background Art
[0002] Molded case circuit breaker is a circuit breaker protection device widely used in electrical systems. It has multiple functions such as automatic protection, manual control and circuit breaker detection. It can cut off the power supply in time when the circuit is overloaded, short-circuited and earthquake-prone to ensure the safety of equipment and personnel.
[0003] The provision of a thermal-magnetic adjustable tripping device in a molded case circuit breaker can effectively improve the safety and stability of the power system. A lever bracket, a thermally adjustable rod, a magnetically adjustable rod, a tripping rod and other components are provided inside the thermal-magnetic dual adjustable tripping device, and a thermally and magnetically adjustable knob is installed on the lever bracket. However, most of the existing thermal-magnetic dual adjustable tripping devices are kept stable by cooperating with other components in the molded case circuit breaker, and there are few structures in which the components in the tripping device can cooperate with each other stably, resulting in poor stability of the tripping device itself and inconvenience in assembly. In addition, the existing thermal-magnetic dual adjustable tripping device also has the problem of poor adjustability of the adjustable knob. Summary of the invention
[0004] Aiming at the problems existing in the thermal magnetic adjustable tripping device inside the existing molded case circuit breaker, the following utility model is proposed:
[0005] A thermally-magnetic adjustable tripping device comprises a lever bracket, a thermally-adjustable rod, a magnetically-adjustable rod and a tripping rod. A thermally-adjustable knob and a magnetically-adjustable knob are provided on the lever bracket. At least two bracket feet are provided below the lever bracket. Each bracket foot is provided with a fixing block. A snap-fitting groove for the magnetically-adjustable rod to fit into is provided between the fixing block and the bracket foot. A snap-fitting block extending downward and clamping the magnetically-adjustable rod from above is provided in the middle of the lever bracket. A protruding column is provided at the bottom of the thermally-adjustable knob. A positioning groove for inserting the protruding column is provided on the thermally-adjustable rod. The tripping rod is detachably installed below the thermally-adjustable rod.
[0006] Furthermore, the lever bracket is also provided with a mounting hole and a stopper, the thermally adjustable knob and the magnetically adjustable knob are snap-fitted and installed in the mounting hole, and the thermally adjustable knob and the magnetically adjustable knob are both provided with a baffle, and the stopper blocks the side of the baffle to limit the thermally adjustable knob and the magnetically adjustable knob from rotating in that direction.
[0007] Furthermore, the number of the stopper is set to one, so as to enable the thermally adjustable knob and the magnetically adjustable knob to rotate freely in a single direction.
[0008] Furthermore, a plurality of extension plates are provided at the bottom of the magnetically adjustable rod, and a hook is provided at the end of each extension plate, and a hook spring is hung on the hook.
[0009] Furthermore, the hook is square, with a hook groove at the top of the hook and a hook hole in the middle of the hook, and the hook ring of the hook spring penetrates and hooks into the hook hole.
[0010] Furthermore, the extension plate gradually shrinks downward from the top and is in an inverted triangle shape as a whole.
[0011] Furthermore, a slot is provided on the trip rod, and an insert block is provided at the bottom of the thermally adjustable rod to be inserted into the slot so as to fix the trip rod and the thermally adjustable rod.
[0012] A molded case circuit breaker comprises a base, on which the above-mentioned thermal-magnetic adjustable tripping device is installed.
[0013] The utility model proposes a thermal-magnetic adjustable tripping device and a molded case circuit breaker, wherein the thermal-magnetic adjustable tripping device has the following beneficial effects: the lever bracket and the magnetically adjustable rod can be matched with each other, and the thermally adjustable rod and the tripping rod can be matched with each other, so that the tripping device as a whole is easy to assemble, and the stability of the assembled tripping device is better; the adjustable angles of the magnetically adjustable knob and the thermally adjustable knob are large, which is convenient for adjustment and use; the hook on the magnetically adjustable rod adopts a square structure, which is convenient for matching with the hook spring, and the stability after matching is better. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The three-dimensional structure of the adjustable tripping device in the utility model is shown in FIG. Figure 1 ;
[0015] Figure 2 The three-dimensional structure diagram of the adjustable tripping device in the utility model is shown in FIG. Figure 2 ;
[0016] Figure 3 It is a three-dimensional structural schematic diagram of the lever bracket in the utility model;
[0017] Figure 4 It is a three-dimensional structural schematic diagram of the heat adjustable rod of the utility model;
[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the magnetic adjustable rod in the utility model;
[0019] Figure 6 It is a three-dimensional structural schematic diagram of the tripping rod in the utility model;
[0020] Figure 7 It is a three-dimensional structural diagram of the heat adjustable knob of the utility model;
[0021] Figure 8 It is a three-dimensional structural schematic diagram of the magnetic adjustable knob in the utility model;
[0022] Fig. 9 The three-dimensional structure of the molded case circuit breaker in the utility model is shown in FIG. Figure 1 ;
[0023] Fig.10 The three-dimensional structure of the molded case circuit breaker in the utility model is shown in FIG. Figure 2 .
[0024] The corresponding relationship between the illustrations and component names in the figure is as follows:
[0025] 1. Base; 2. Hook spring; 3. Lever bracket; 4. Thermally adjustable rod; 5. Magnetic adjustable rod; 6. Release rod; 7. Thermally adjustable knob; 8. Magnetic adjustable knob; 31. Engagement slot; 32. Block; 33. Fixing block; 34. Stop block; 35. Mounting hole; 36. Bracket foot; 41. Positioning slot; 51. Hook; 52. Extension plate; 53. Hook slot; 54. Hook hole; 55. Rod body; 61. Slot; 71. Baffle; 72. Protruding column; 73. Annular groove. DETAILED DESCRIPTION
[0026] The technical solution of the utility model will be described clearly and completely in combination with the embodiments below. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.
[0027] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0028] In addition to being used to indicate a direction or position relationship, some of the above terms may also be used to indicate other meanings. For example, the term "on" may also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.
[0029] like Figure 1-Figure 8As shown, it is an embodiment preferred by the utility model, a thermal-magnetic adjustable tripping device, comprising a lever bracket 3, a thermally adjustable rod 4, a magnetically adjustable rod 5, and a tripping rod 6. A movable thermally adjustable knob 7 and a magnetically adjustable knob 8 are provided on the lever bracket 3. At least two bracket feet 36 are provided below the lever bracket 3. In the present embodiment, the number of the bracket feet 36 is two, wherein each of the bracket feet 36 is provided with a horizontally extending fixed block 33 at the end thereof, and an arc-shaped engaging groove 31 is formed between the fixed block 33 and the bracket foot 36. The magnetically adjustable rod 5 is provided with a rod body 55 that can be fitted into the engaging groove 31 and can be movably rotated in the engaging groove 31. A rod body 55 that extends downward and extends from the magnetically adjustable rod 5 is also provided in the middle of the lever bracket 3. The block 32 that clamps it has an arc-shaped groove structure that matches the rod body 55 at the end of the block 32, which further prevents the magnetic adjustable rod 5 from directly escaping from the locking groove 31; a protruding column 72 is provided at the bottom of the thermally adjustable knob 7, and a positioning groove 41 is provided on the thermally adjustable rod 4 for inserting the protruding column 72; a slot 61 is provided at the top of the trip rod 6, and an insert block that fits into the slot 61 is provided at the bottom of the thermally adjustable rod 4, so as to detachably fix the trip rod 6 and the thermally adjustable rod 4.
[0030] During the assembly process of the thermal-magnetic adjustable tripping device, the thermally adjustable knob 7 and the magnetically adjustable knob 8 are first installed on the lever bracket 3. An opening slightly larger than the rod body 55 of the magnetically adjustable rod 5 is formed between the fixed block 33 and the clamping block 32 on the lever bracket 3. The opening is connected to the clamping slot 31. The rod body 55 of the magnetically adjustable rod 5 only needs to be clamped into the clamping slot 31 to complete the matching assembly of the lever bracket 3 and the magnetically adjustable rod 5; the matching assembly of the tripping rod 6 and the thermally adjustable rod 4 can be achieved by fixing the plug block at the bottom of the thermally adjustable rod 4 with the slot 61 at the top of the tripping rod 6; finally, the support at the bottom of the magnetically adjustable knob 8 is inserted into the positioning slot 41 on the thermally adjustable knob 7 to complete the assembly of the thermally adjustable tripping. In the thermal-magnetic adjustable tripping device in this embodiment, the internal parts are assembled in pairs, and the entire assembly process is relatively time-saving and labor-saving, and the stability of the thermal-magnetic adjustable tripping device after assembly is good.
[0031] The lever bracket 3 is also provided with a mounting hole 35 and a stopper 34. The thermally adjustable knob 7 and the magnetically adjustable knob 8 are both provided with an annular groove 73 so as to be movably engaged in the mounting hole 35. The thermally adjustable knob 7 and the magnetically adjustable knob 8 are both provided with a baffle 71 which is unfolded at a certain angle. The baffle 71 is fan-shaped as a whole. The stopper 34 blocks the side of the baffle 71 to limit the rotation of the thermally adjustable knob 7 and the magnetically adjustable knob 8 in this direction. Furthermore, in the present embodiment, the number of the stopper 34 is set to one, and the thermally adjustable knob 7 and the magnetically adjustable knob 8 can rotate freely toward the side where the stopper 34 does not exist. By increasing the unfolding angle of the baffle 71, the rotation angle of the thermally adjustable knob 7 and the magnetically adjustable knob 8 can be further reduced. The rotation angle of the thermally adjustable knob 7 and the magnetically adjustable knob 8 in the present embodiment is 0-180°.
[0032] In this embodiment, three extension plates 52 are further provided at the bottom of the magnetically adjustable rod 5. The extension plates 52 gradually shrink from the top to the bottom and are in an inverted triangle shape as a whole. A square hook 51 is provided at the end of each extension plate 52. A hook spring 2 is hung on the hook 51. A hook ring is provided at the end of the hook spring 2. Specifically, a hook groove 53 and a hook hole 54 are provided at the top and the middle of the hook 51 respectively. The hook ring part is matched in the hook groove 53, and the end of the hook ring penetrates the hook hole 54. Since the hook ring part of the hook spring penetrates the hook hole 54, on the one hand, the hook ring can be matched with the hook 51 without deformation, which improves the reliability of the hook spring 2. On the other hand, it also reduces the possibility of the hook spring 2 detaching from the hook 51 during the rotation of the magnetically adjustable rod 5, which is more stable and reliable.
[0033] like Figure 9-10 As shown, the utility model also proposes a molded case circuit breaker, comprising a base 1 , on which the above-mentioned thermal-magnetic adjustable tripping device is installed.
[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A thermal-magnetic adjustable tripping device, comprising a lever bracket (3), a thermally adjustable rod (4), a magnetically adjustable rod (5), and a tripping rod (6), wherein a thermally adjustable knob (7) and a magnetically adjustable knob (8) are provided on the lever bracket (3), characterized in that: At least two bracket feet (36) are provided below the lever bracket (3), each bracket foot (36) is provided with a fixing block (33), a snap-in groove (31) for the magnetically adjustable rod (5) to be snapped in is provided between the fixing block (33) and the bracket foot (36), a snap-in block (32) extending downward and snapping the magnetically adjustable rod (5) from above is provided in the middle of the lever bracket (3), a protruding column (72) is provided at the bottom of the thermally adjustable knob (7), a positioning groove (41) for the protruding column (72) to be inserted is provided on the thermally adjustable rod (4), and the trip rod (6) is detachably installed below the thermally adjustable rod (4).
2. The thermal-magnetic adjustable tripping device according to claim 1, characterized in that: The lever bracket (3) is also provided with a mounting hole (35) and a stopper (34), the thermally adjustable knob (7) and the magnetically adjustable knob (8) are snap-fitted and mounted in the mounting hole (35), the thermally adjustable knob (7) and the magnetically adjustable knob (8) are both provided with a baffle (71), and the stopper (34) blocks the side of the baffle (71) to limit the thermally adjustable knob (7) and the magnetically adjustable knob (8) from rotating in that direction.
3. The thermal-magnetic adjustable tripping device according to claim 2, characterized in that: The number of the stopper (34) is set to one, so as to realize the free rotation of the thermally adjustable knob (7) and the magnetically adjustable knob (8) in a single direction.
4. The thermal-magnetic adjustable tripping device according to claim 1, characterized in that: A plurality of extension plates (52) are provided at the bottom of the magnetically adjustable rod (5), and a hook (51) is provided at the end of each extension plate (52).
5. The thermal-magnetic adjustable tripping device according to claim 4, characterized in that: The hook (51) is square in shape, a hook groove (53) is provided at the top of the hook (51), and a hook hole (54) is provided in the middle of the hook (51).
6. The thermal-magnetic adjustable tripping device according to claim 4, characterized in that: The extension plate (52) gradually shrinks from the top downwards and is in an inverted triangle shape as a whole.
7. The thermal-magnetic adjustable tripping device according to claim 1, characterized in that: The trip rod (6) is provided with a slot (61), and the bottom of the thermally adjustable rod (4) is provided with an insert block that fits and is inserted into the slot (61) to fix the trip rod (6) and the thermally adjustable rod (4).
8. A molded case circuit breaker, comprising a base (1), characterized in that: The base (1) is provided with a thermal-magnetic adjustable tripping device as described in any one of claims 1 to 7.