Adjustable instantaneous protection mechanism

Abstract

The utility model relates to the technical field of electrical equipment, in particular to an adjustable instantaneous protection mechanism. Comprising a base, a mechanical transmission mechanism and an electromagnetic tripper, the electromagnetic tripper comprises an armature, and the electromagnetic tripper comprises an instantaneous spring used for providing pulling force for the armature; the variable torsion spring comprises supporting rods at the two ends, and the first supporting rod abuts against the armature and provides pressure for the armature; the instantaneous adjusting assembly is used for adjusting the angle between the second supporting rod and the first supporting rod of the variable torsion spring; the torsion spring is arranged to support the bottom of the armature, the armature is high in strength, not prone to deformation and capable of bearing large pressure, the torque force of the variable torsion spring is controlled through the instant adjusting assembly, the adjusting precision is higher, and the adjusting range is larger.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical equipment, especially a kind of adjustable instantaneous protection mechanism. BACKGROUND

[0002] Circuit breaker is important protection device in circuit, its core function is rapidly cutting off power supply when circuit appears exception, prevents fault expansion.Instantaneous protection mechanism is the key component that circuit breaker realizes fast protection, mainly for responding to the serious fault (such as short circuit) of sudden in circuit, with the characteristics of quick action, response time is short.

[0003] Instantaneous protection mechanism includes electromagnetic release and mechanical transmission mechanism, electromagnetic release includes coil, core, armature and instantaneous spring, mechanical transmission mechanism includes traction rod, release hook and reset spring etc., responsible for the action transmission of release to circuit breaker contact system, realizes switching off.

[0004] In existing adjustable instantaneous protection mechanism is by changing the relative position of driving rod and armature, to adjust the length of instantaneous spring, to adjust the size of instantaneous spring's elasticity;The above-mentioned method's instantaneous spring's tension is too big, will make the position of armature connected instantaneous spring deformation, causes instantaneous spring's unloading and the damage of component.

[0005] Therefore, there is an urgent need for a technical solution to solve the above problems. CONTENT OF UTILITY MODEL

[0006] The utility model aims at the above-mentioned technical problem, provides a kind of adjustable instantaneous protection mechanism's technical effect of higher adjustment precision, greater adjustment range.

[0007] Therefore, the utility model provides a kind of adjustable instantaneous protection mechanism, including base, mechanical transmission mechanism and electromagnetic release, electromagnetic release includes armature, comprising: instantaneous spring, instantaneous spring is used to provide the tension of armature;

[0008] Variable torsional spring, including the support of both ends, first support is in contact on armature, and provide pressure for armature;

[0009] Instantaneous adjustment component, for adjusting the angle of second support and first support of variable torsional spring.

[0010] Further, instantaneous adjustment component includes:

[0011] Adjusting rod is rotatably connected on base, adjusting rod is fixedly provided with swing rod, swing rod is in contact on second support, adjusting rod is also fixedly provided with driving rod;

[0012] Drive adjustment component, for rod swing driving rod.

[0013] Further, the drive adjusting assembly comprises:

[0014] The bracket is fixedly installed on the base;

[0015] The instantaneous adjusting knob is rotationally connected to the bracket, and the lower end of the instantaneous adjusting knob is provided with an annular inclined surface which abuts against the drive rod.

[0016] Further, the utility model also comprises:

[0017] The plurality of gear grooves are arranged on the inner wall of the bracket close to the instantaneous adjusting knob;

[0018] The locking spring is fixedly arranged on the side wall of the instantaneous adjusting knob and cooperates with any gear groove.

[0019] Further, the armature is provided with two symmetrical instantaneous springs.

[0020] Further, the variable torsion spring is symmetrical and provided with two first supporting rods which are connected to each other.

[0021] Further, the swing rod is provided with a mounting groove for limiting the second supporting rod.

[0022] Further, the utility model also comprises:

[0023] The fixing member is fixedly installed on the base, the bracket is fixedly installed on the fixing member, and the bracket and the fixing member form a mounting hole for mounting the adjusting rod.

[0024] Further, the utility model also comprises:

[0025] The rotation limiting portion is arranged on the circumferential side of the instantaneous adjusting knob;

[0026] The fixed limiting portion is formed on the side wall of the bracket close to the rotation limiting portion, and the instantaneous adjusting knob is stopped when the rotation limiting portion abuts against the fixed limiting portion.

[0027] The utility model has the advantages of:

[0028] 1. The utility model discloses a torsion spring supporting armature bottom, the strength of the armature itself is high, is not easy to deform, can bear greater pressure, and the torsion of the variable torsion spring is controlled through the instantaneous adjusting assembly, so that the adjusting precision is higher, and the adjusting range is larger.

[0029] 2. The armature of the utility model is adjusted through the same drive adjusting assembly, so that the pressure borne by the armature is always the same. DRAWINGS

[0030] Figure 1 It is the structural schematic view of the utility model installation in the base;

[0031] Figure 2 It is a three-dimensional structure schematic view of the utility model;

[0032] Figure 3 It is a three-dimensional structure schematic view of the utility model;

[0033] Figure 4 It is a structure schematic view of the support and instantaneous adjusting knob of the utility model;

[0034] Figure 5 It is a structure schematic view of the variable torsion spring of the utility model.

[0035] The mark in the figure indicates that:

[0036] 1, base; 2, traction rod; 3, armature; 4, instantaneous spring; 5, variable torsion spring; 6, first support rod; 7, second support rod; 8, adjusting rod; 9, swing rod; 10, drive rod; 11, support; 12, instantaneous adjusting knob; 13, annular inclined surface; 14, gear slot; 15, locking spring piece; 16, mounting groove; 17, fixing part; 18, mounting hole; 19, rotation limiting part; 20, fixed limiting part; 21, metal mounting seat. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly described 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, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0038] Embodiment 1:

[0039] The embodiment provides an adjustable instantaneous protection mechanism, which comprises a base 1, a mechanical transmission mechanism and an electromagnetic release, and the electromagnetic release comprises an armature 3, which comprises:

[0040] An instantaneous spring 4, the instantaneous spring 4 is used for providing a pulling force for the armature 3;

[0041] A variable torsion spring 5, comprising two end support rods, a first support rod 6 abutting against the armature 3 and providing a pressure for the armature 3;

[0042] An instantaneous adjusting assembly, used for adjusting the angle of the second support rod 7 and the first support rod 6 of the variable torsion spring 5.

[0043] The base 1 is a base body of the circuit breaker for mounting components, the mechanical transmission mechanism is a mechanism for realizing tripping in mechanical linkage with the electromagnetic tripping device, the mechanical transmission mechanism comprises a traction rod 2 for linkage with an armature 3 of the electromagnetic tripping device, the electromagnetic tripping device comprises a coil and a core, and a metal mounting seat for mounting the armature 3 is fixed on the base 1, the armature 3 is swingably mounted on two side walls of the metal mounting seat, one end of a transient spring 4 is hung and mounted on the metal mounting seat, the other end of the transient spring 4 is hung and mounted on the armature 3, the armature 3 is pulled away from the electromagnet through the pulling force of the transient spring 4, and a mounting rod is arranged on the side wall, a variable torsional spring 5 is sleeved on the mounting rod, two ends of the variable torsional spring 5 are respectively a first branch rod 6 and a second branch rod 7, a side surface of the first branch rod 6 abuts against a bottom of the armature 3, and the first branch rod 6 can provide a force for the armature 3 to move away from the electromagnet; a transient adjustment assembly is arranged on the base 1 or the mounting seat, the transient adjustment assembly is connected with the second branch rod 7 of the variable torsional spring 5, the angle between the second branch rod 7 and the first branch rod 6 can be changed to increase the torsional strength of the variable torsional spring 5, and the transient adjustment assembly can adopt an eccentric wheel which is rotationally connected to the base 1, a circumferential surface of the eccentric wheel abuts against the second branch rod 7, and a groove for accommodating the second branch rod 7 is arranged on the circumferential surface of the eccentric wheel to increase stability.

[0044] By arranging the torsional spring to support the bottom of the armature 3, the strength of the armature 3 itself is high, the armature 3 is not easy to deform, and the armature 3 can bear a larger pressure, and the torsional force of the variable torsional spring 5 is controlled through the transient adjustment assembly, so that the adjustment accuracy is higher, and the adjustment range is larger.

[0045] Embodiment 2

[0046] The embodiment provides an adjustable transient protection mechanism, in addition to the technical solutions of the above-mentioned embodiments, the adjustable transient protection mechanism also has the following technical features.

[0047] The transient adjustment assembly comprises:

[0048] An adjustment rod 8 is rotationally connected to the base 1, a swing rod 9 is fixedly arranged on the adjustment rod 8, the swing rod 9 abuts against the second branch rod 7, and a driving rod 10 is also fixedly arranged on the adjustment rod 8;

[0049] A driving adjustment assembly is arranged on the rod to swing the driving rod 10.

[0050] At least two positions of the rod of the adjustment rod 8 are rotationally connected to the base 1, an integral swing rod 9 is fixedly arranged on a rod surface of the adjustment rod 8, the swing rod 9 abuts against the second branch rod 7, an integral driving rod 10 is also fixedly arranged on the rod surface of the adjustment rod 8, the driving rod 10 is swung through the driving of the driving adjustment assembly, so that the adjustment rod 8 is rotated, the swing rod 9 is driven to push the second branch rod 7, and the torsional force of the variable torsional spring 5 is changed.

[0051] Since the armatures 3 in some circuit breakers are not only one, all the armatures 3 are regulated by the same driving regulating assembly, so that the pressure on the armatures 3 is always the same.

[0052] The driving regulating assembly comprises:

[0053] The support 11 is fixedly installed on the base 1;

[0054] The instantaneous regulating knob 12 is rotationally connected to the support 11, and the lower end of the instantaneous regulating knob 12 is provided with an annular inclined surface 13 abutting against the driving rod 10.

[0055] The support 11 is fixedly installed on the base 1 in a detachable manner, the instantaneous regulating knob 12 is rotationally connected to the support 11 through a stepped structure and a clamping spring, the lower end surface of the instantaneous regulating knob 12 is an annular inclined surface, and the annular inclined surface 13 abuts against the driving rod 10, the position of the driving rod 10 is changed by rotating the instantaneous regulating knob 12, so that the torsional force of the variable torsional spring 5 is changed.

[0056] Further comprising:

[0057] The plurality of gear slots 14 are arranged on the inner wall of the support 11 close to the instantaneous regulating knob 12;

[0058] The locking spring 15 is fixedly arranged on the side wall of the instantaneous regulating knob 12 and cooperates with any gear slot 14.

[0059] The hole for rotationally connecting the instantaneous regulating knob 12 is arranged at the top end of the support 11, the plurality of gear slots 14 are arranged on the inner wall of the hole, each gear slot 14 corresponds to the variable torsional spring 5 of different torsional force, and the locking spring 15 is arranged on the side wall of the instantaneous regulating knob 12 and can be elastically deformed in the radial direction, when the instantaneous regulating knob 12 is rotated, the locking spring 15 is correspondingly matched in different gear slots 14, so that the position of the instantaneous regulating knob 12 is fixed.

[0060] Embodiment 3:

[0061] The embodiment provides an adjustable instantaneous protection mechanism, in addition to the technical solutions of the above-mentioned embodiments, further comprising the following technical features.

[0062] The armature 3 is provided with two symmetrical instantaneous springs 4.

[0063] The two instantaneous springs 4 can make the force on the armature 3 more balanced and the structure more stable.

[0064] The two variable torsional springs 5 are symmetrically arranged, and the first supporting rods 6 of the two variable torsional springs 5 are connected to each other.

[0065] The two variable torsion springs 5 can balance the force on the armature 3 and make the structure more stable. The ends of the first supporting rods 6 of the two variable torsion springs 5 are connected by a cross rod to form a whole, so that the variable torsion springs 5 support the armature 3 in a larger area and enhance the stability of the structure of the variable torsion springs 5 supporting the armature 3.

[0066] The swing rod 9 is provided with a mounting groove 16 for limiting the second supporting rod 7.

[0067] The mounting groove 16 is arranged on the surface of the swing rod 9 that is in contact with the second supporting rod 7. The mounting groove 16 can increase the stability of the cooperation between the second supporting rod 7 and the swing rod 9 during the swinging of the swing rod 9.

[0068] Further comprising:

[0069] The fixing member 17 is fixedly installed on the base 1, and the bracket 11 is fixedly installed on the fixing member 17. The bracket 11 and the fixing member 17 form a mounting hole 18 for installing the adjusting rod 8.

[0070] The fixing member 17 is detachably fixedly installed on the base 1, and the bracket 11 is installed on the fixing member 17. The bracket 11 and the fixing member 17 are connected to form a mounting hole 18 for rotatably connecting the adjusting rod 8. The assembly of the fixing member 17 and the bracket 11 is provided with at least two to increase the stability of the rotation of the adjusting rod 8. The fixing member 17 and the bracket 11 are arranged to be installed and connected into a whole first, and then installed and connected to the base 1, so as to facilitate the installation of the adjusting rod 8 and the driving adjusting assembly.

[0071] Further comprising:

[0072] The rotation limiting portion 19 is arranged on the side of the instantaneous adjusting knob 12.

[0073] The fixed limiting portion 20 is formed on the side wall of the bracket 11 close to the rotation limiting portion 19, and the instantaneous adjusting knob 12 stops when the rotation limiting portion 19 is in contact with the fixed limiting portion 20.

[0074] The rotation limiting portion 19 is in the shape of a sector and is fixed on the side of the instantaneous adjusting knob 12. The fixed limiting portion 20 is formed on the inner side wall of the hole for installing the instantaneous adjusting knob 12. The instantaneous adjusting knob 12 stops when the rotation limiting portion 19 is in contact with the fixed limiting portion 20, so that the instantaneous adjusting knob 12 can only rotate reciprocally within a range.

[0075] The included angle of the three gears is 120°, and the rotation range of the instantaneous adjusting knob 12 is also 120°.

[0076] The embodiments of the present application are described above with reference to the drawings, and the embodiments and features in the embodiments of the present application can be combined with each other without conflict, the present application is not limited to the above-described specific embodiments, the above-described specific embodiments are only illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms without departing from the purpose of the present application and the scope protected by the claims under the inspiration of the present application, which all belong to the protection scope of the present application.

Claims

1. An adjustable instantaneous protection mechanism, comprising a base (1), a mechanical transmission mechanism, and an electromagnetic trip unit, wherein the electromagnetic trip unit includes an armature (3), characterized in that, include: Instantaneous spring (4) is used to provide tension to armature (3); The variable torsion spring (5) includes struts at both ends, the first strut (6) abutting against the armature (3) and providing pressure to the armature (3); Instantaneous adjustment assembly for adjusting the angle between the second support rod (7) and the first support rod (6) of the variable torsion spring (5).

2. The adjustable instantaneous protection mechanism according to claim 1, characterized in that, The instantaneous adjustment component includes: Adjusting rod (8) is rotatably connected to base (1). A swing rod (9) is fixedly provided on adjusting rod (8). The swing rod (9) abuts against the second support rod (7). A drive rod (10) is also fixedly provided on adjusting rod (8). A drive adjustment assembly is used to make the drive lever (10) swing.

3. The adjustable instantaneous protection mechanism according to claim 2, characterized in that, The drive adjustment components include: The bracket (11) is fixedly installed on the base (1); The instantaneous adjustment knob (12) is rotatably connected to the bracket (11). The lower end of the instantaneous adjustment knob (12) is provided with an annular inclined surface (13), which abuts against the drive rod (10).

4. The adjustable instantaneous protection mechanism according to claim 3, characterized in that, Also includes: Several gear slots (14) are provided on the inner wall of the bracket (11) near the instantaneous adjustment knob (12); The locking spring (15) is fixedly mounted on the side wall of the instantaneous adjustment knob (12) and engages with any gear slot (14).

5. The adjustable instantaneous protection mechanism according to claim 1, characterized in that, Two symmetrically arranged instantaneous springs (4) are provided on the armature (3).

6. The adjustable instantaneous protection mechanism according to claim 1, characterized in that, Two variable torsion springs (5) are provided symmetrically, and the first support rods (6) of the two variable torsion springs (5) are connected to each other.

7. An adjustable instantaneous protection mechanism according to claim 2, characterized in that, The swing arm (9) is provided with a mounting groove (16) for limiting the second support rod (7).

8. An adjustable instantaneous protection mechanism according to claim 3, characterized in that, Also includes: The fastener (17) is fixedly installed on the base (1), and the bracket (11) is fixedly installed on the fastener (17). The bracket (11) and the fastener (17) form a mounting hole (18) for installing the adjusting rod (8).

9. An adjustable instantaneous protection mechanism according to claim 3, characterized in that, Also includes: A rotation limit part (19) is provided on the periphery of the instantaneous adjustment knob (12); The fixed limiting part (20) is formed on the side wall of the bracket (11) near the rotation limiting part (19), and stops when the instantaneous adjustment knob (12) is rotated to the point where the rotation limiting part (19) touches the fixed limiting part (20).

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