Tripping mechanism with adjustable thermal tripping

Abstract

The utility model relates to a tripping mechanism with adjustable thermal tripping. The problem that the time of a release of an existing molded case circuit breaker cannot be adjusted is solved. The traction device comprises a traction rod and further comprises a support installed on a circuit breaker shell; the transmission mechanism is used for being matched with the tripping structure to realize tripping; and the adjusting structure is arranged on the bracket and is used for driving the transmission mechanism to act so as to adjust the tripping time. The beneficial effects of the utility model are that the adjusting structure and the transmission mechanism are arranged, and the adjusting structure and the transmission mechanism cooperate with each other to adjust the tripping time. The utility model also has the advantages of simple structure, convenience in assembly, reliable action, long service life and the like.

Description

Technical Field

[0001] The utility model relates to a plastic case circuit breaker, in particular to a tripping mechanism with adjustable thermal tripping. Background Art

[0002] A plastic case circuit breaker mainly consists of a contact arc extinguishing system, an operating mechanism and a release. The function of the release is to monitor the current and voltage operation data of the main circuit, and set a certain threshold value according to national standards to form the tripping performance of a specific protection curve. When an overload or short - circuit fault occurs in the circuit, the release realizes the protection of the plastic case circuit breaker against overload or short - circuit faults through thermal effect or magnetic effect.

[0003] Traditional thermal - magnetic releases mainly achieve overload protection and short - circuit protection through the cooperation of a bimetallic strip and an armature. When the circuit is overloaded, the bimetallic strip is deformed by heat, and then drives the operating mechanism to act and disconnect the circuit; when the circuit is short - circuited, the electromagnet of the thermal - magnetic release generates magnetic force to adsorb the armature, so that the armature releases the main contact through the transmission mechanism after being adsorbed, playing the effect of power - off protection. However, in the actual production and use process, according to different required scenarios, sometimes it is necessary to delay tripping, so that the circuit breaker separates. However, the tripping time of the existing plastic case circuit breaker is usually specific and cannot be adjusted actually. Summary of the Utility Model

[0004] To solve the problem that the tripping time of the release of the existing plastic case circuit breaker in the background art cannot be adjusted, the utility model provides a tripping mechanism with adjustable thermal tripping.

[0005] The technical solution of the utility model is: a tripping mechanism with adjustable thermal tripping, including a traction rod, and further including:

[0006] A bracket, installed on the circuit breaker housing;

[0007] A transmission mechanism, used to cooperate with the tripping structure to achieve tripping;

[0008] An adjusting structure, arranged on the bracket, used to drive the transmission mechanism to act to adjust the tripping time.

[0009] As a further improvement of the utility model, the transmission mechanism includes a first transmission part, the adjusting structure includes a first adjusting part, the first transmission part is arranged on the traction rod and rotates synchronously with the traction rod, and a first driving part for facilitating the thermal release to drive tripping is arranged on the first transmission part.

[0010] As a further improvement of the present utility model, a first adjusting portion is provided on the first adjusting member, a first transmission portion adapted to the first adjusting portion is provided on the first transmission member, and the first driving portion and the first transmission portion cooperate with each other and are used to drive the first transmission member to axially slide relative to the towing bar.

[0011] As a further improvement of the present utility model, the first transmission portion includes a first transmission groove which is linearly arranged. The first adjusting portion is inserted into the first transmission groove and drives the first transmission member to axially slide relative to the towing bar when the first adjusting member rotates.

[0012] As a further improvement of the present utility model, the first transmission portion includes a first transmission block. The first transmission groove is arranged on the first transmission block. One end of the first transmission block close to the bracket is obliquely arranged, and the first adjusting portion is eccentrically arranged on the first adjusting member.

[0013] As a further improvement of the present utility model, the first transmission member and the towing bar achieve axial sliding fit of the first transmission member along the towing bar through the mutual cooperation of a hook and a sliding groove.

[0014] As a further improvement of the present utility model, the first driving portion includes a plurality of driving surfaces. At least one driving surface can be driven to trip by a thermal release, and the distances between different driving surfaces and the thermal release are different.

[0015] As a further improvement of the present utility model, a groove and a protrusion are provided at the joint surface between the first adjusting member and the bracket. The first adjusting member passes through the bracket and the protrusion disengages from the groove when rotating, so that the first adjusting member axially slides relative to the bracket along the axis of the first adjusting member.

[0016] As a further improvement of the present utility model, an elastic member is further included. The elastic member is arranged between the first adjusting member and the bracket, and the elastic member has a function of driving the first adjusting member to approach the bracket so as to limit the first transmission member.

[0017] As a further improvement of the present utility model, a limiting block is further included, which is arranged on the first adjusting member and is used to cooperate with the bracket to realize rotation limiting of the first adjusting member.

[0018] The beneficial effects of the present utility model are that an adjusting structure and a transmission mechanism are provided, and the tripping time is adjusted through the mutual cooperation of the adjusting structure and the transmission structure. The present utility model also has the advantages of simple structure, convenient assembly, reliable operation and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 is a schematic structural diagram of an embodiment of the present utility model.

[0020] AttachedFigure 2 This is a schematic structural diagram of the explosion at the drawbar in the embodiment of the present utility model.

[0021] Appendix Figure 3 This is a schematic structural diagram of the first transmission member in the embodiment of the present utility model.

[0022] Appendix Figure 4 This is a schematic structural diagram of the bracket in the embodiment of the present utility model.

[0023] Appendix Figure 5 It is the appendix Figure 4 The explosion structural diagram of

[0024] In the figure, 1 is the drawbar; 11 is the sliding groove; 2 is the bracket; 21 is the protrusion; 3 is the first transmission member; 31 is the first driving part; 311 is the driving surface; 32 is the first transmission part; 321 is the first transmission groove; 322 is the first transmission block; 33 is the hook; 4 is the first adjusting member; 41 is the first adjusting part; 42 is the groove; 43 is the elastic member; 44 is the limiting block. Specific embodiments

[0025] The following further describes the embodiments of the present utility model in conjunction with the drawings:

[0026] From Figure 1 Combined with Figures 2 - 5 As shown, a thermal release adjustable release mechanism includes a drawbar 1 and further includes:

[0027] A bracket 2, which is installed on the circuit breaker housing;

[0028] A transmission mechanism, which is used to cooperate with the release structure to achieve release;

[0029] An adjusting structure, which is arranged on the bracket 2 and is used to drive the transmission mechanism to act to adjust the release time. The beneficial effects of the present utility model are that an adjusting structure and a transmission mechanism are provided, and through the mutual cooperation of the adjusting structure and the transmission structure, the adjustment of the release time is realized. The present utility model also has the advantages of simple structure, convenient assembly, reliable action, long service life, etc. The beneficial effects of the present utility model are that an adjusting structure and a transmission mechanism are provided, and through the mutual cooperation of the adjusting structure and the transmission structure, the adjustment of the release time is realized. The present utility model also has the advantages of simple structure, convenient assembly, reliable action, long service life, etc. Usually, the drawbar is arranged on the bracket of the circuit breaker operating mechanism, and the release structure includes thermal release and magnetic release. Thermal release means achieving release through a bimetal. The present utility model provides a first transmission member, and by adjusting the structure, the distance between the bimetal and the first transmission member of the release is adjusted. If the distance is long, the release time is long, that is, the adjustable release time is realized. The bimetal of the present utility model can drive the drawbar to rotate to achieve the release of the circuit breaker by making the first transmission member rotate.

[0030] The transmission mechanism includes a first transmission member 3, the adjustment structure includes a first adjustment member 4, the first transmission member 3 is arranged on the traction rod 1 and rotates synchronously with the traction rod 1, and the first transmission member 3 is provided with a first driving part 31 for facilitating the thermal release to drive the release. Usually, the thermal release (bimetallic strip) realizes the circuit breaker release by rotating the first transmission member to drive the traction rod to rotate.

[0031] The first adjusting member 4 is provided with a first adjusting portion 41, the first transmission member 3 is provided with a first transmission portion 32 adapted to the first adjusting portion 41, the first driving portion 31 and the first transmission portion 32 cooperate with each other and are used to drive the first transmission member 3 to slide axially relative to the traction rod 1. Specifically, the first transmission portion 32 includes a first transmission groove 321, the first transmission groove 321 is linearly arranged, the first adjusting portion 41 is inserted into the first transmission groove 321 and drives the first transmission member 3 to slide axially relative to the traction rod 1 when the first adjusting member 4 rotates. More specifically, the first transmission portion 32 includes a first transmission block 322, the first transmission groove 321 is arranged on the first transmission block 322, the first transmission block 322 is obliquely arranged near one end of the bracket 2, and the first adjusting portion 41 is eccentrically arranged on the first adjusting member 4. In this way, when the first adjusting member rotates, the first transmission member can drive the first transmission member to move horizontally along the axis of the first transmission member, so that the bimetallic strip cooperates with different driving surfaces. When the first adjusting member rotates, the first transmission member can be driven to slide left and right, which changes the action stroke of the bimetallic strip in disguise, so that the delayed action time can be adjusted by the first adjusting member, that is, by adjusting different driving surfaces, the length adjustment from the bimetallic strip to the first driving part can be achieved, that is, the tripping time can be adjusted, so that the product has a wide range of uses. The first transmission block is arranged obliquely to avoid interference with the bracket when the traction rod rotates, so that the product can operate reliably.

[0032] The first transmission member 3 and the traction rod 1 cooperate with each other through the hook 33 and the sliding groove 11 to achieve the first transmission member 3 slidingly cooperate along the axial direction of the traction rod 1. Specifically, the hook is in an inverted "T" shape. Such a structure makes the first transmission member move smoothly and reliably, and can be limited by the sliding groove.

[0033] The first driving part 31 includes a plurality of driving surfaces 311, at least one of which can be driven to trip by the thermal release, and the distances between different driving surfaces 311 and the thermal release are different. When different driving surfaces cooperate with the thermal release, the length from the bimetallic strip to the driving surface is changed, and the tripping time is adjustable, so that the product has a wide range of uses. The first transmission block is arranged obliquely to avoid interference with the bracket when the traction rod rotates, so that the product can operate reliably.

[0034] A groove 42 and a protrusion 21 are provided at the joint surface between the first adjusting member 4 and the bracket 2. The first adjusting member 4 passes through the bracket 2 and when rotated, the protrusion 21 disengages from the groove 42, causing the first adjusting member 4 to slide axially relative to the bracket along the axis of the first adjusting member 4. Specifically, the present invention further includes an elastic member 43 disposed between the first adjusting member 4 and the bracket 2. The elastic member 43 has a driving force to move the first adjusting member 4 closer to the bracket 2 so as to limit the first transmission member 3. When installing, align the groove and the protrusion for easy installation. A washer (elastic member) is sleeved on the first adjusting member and fastened with a clamp. When the knob (first adjusting member) is rotated, due to the protrusion of the bracket, the knob will move downward, and the upper elastic member (washer) will be deformed due to the downward movement of the knob, that is, the knob compresses the elastic member and the elastic member generates an upward force acting on the first adjusting member, thereby increasing the pressure between the first adjusting member and the bracket, so as to increase the relative friction force to hold the first adjusting member (and thus provide a reaction force to ensure there is sufficient friction force on the connecting surface between the knob and the protrusion), ensuring that the first transmission member will not shift left or right, and ensuring that the first transmission member will not shift left or right after the circuit breaker is transported or adjusted, so that the first transmission member will not be displaced.

[0035] The present invention further includes a limiting block 44 disposed on the first adjusting member 4 for cooperating with the bracket 2 to realize the rotational limit of the first adjusting member 4. Specifically, the limiting block can cooperate with the bracket for limiting, or can be disposed on the plane where the protrusion is located, or a stop block cooperating with the limiting block is provided on the plane where the protrusion is located, so as to limit the rotation of the first adjusting member.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0038] Attention to all technicians: Although the present utility model has been described according to the above specific embodiments, the inventive concept of the present utility model is not limited to this utility model. Any modification using the inventive concept of the present utility model will be included in the scope of protection of the patent right of the present utility model.

Claims

1. A tripping mechanism with adjustable thermal tripping, comprising a traction rod (1), characterized in that: Also includes: A bracket (2) is mounted on the circuit breaker housing; A transmission mechanism, used for cooperating with the tripping structure to realize tripping; The adjustment structure is arranged on the bracket (2) and is used to drive the transmission mechanism to move and adjust the tripping time.

2. A thermally trip adjustable tripping mechanism according to claim 1, characterized in that The transmission mechanism comprises a first transmission member (3), the adjustment structure comprises a first adjustment member (4), the first transmission member (3) is arranged on the traction rod (1) and rotates synchronously with the traction rod (1), and the first transmission member (3) is provided with a first driving part (31) for facilitating the thermal release to drive the release.

3. A thermally trip adjustable tripping mechanism according to claim 2, characterized in that The first adjusting member (4) is provided with a first adjusting portion (41), the first transmission member (3) is provided with a first transmission portion (32) matched with the first adjusting portion (41), and the first driving portion (31) and the first transmission portion (32) cooperate with each other and are used to drive the first transmission member (3) to perform axial sliding movement relative to the traction rod (1).

4. A thermally trip adjustable tripping mechanism according to claim 3, characterized in that The first transmission part (32) comprises a first transmission groove (321), the first transmission groove (321) being arranged in a linear manner, and the first adjustment part (41) is inserted into the first transmission groove (321) and drives the first transmission part (3) to slide axially relative to the traction rod (1) when the first adjustment part (4) rotates.

5. A thermally trip adjustable tripping mechanism according to claim 4, characterized in that The first transmission part (32) comprises a first transmission block (322), the first transmission groove (321) is provided on the first transmission block (322), the first transmission block (322) is obliquely arranged at one end close to the bracket (2), and the first adjustment part (41) is eccentrically arranged on the first adjustment member (4).

6. A thermally trip adjustable tripping mechanism according to claim 2, characterized in that The first transmission member (3) and the traction rod (1) cooperate with each other through the hook (33) and the sliding groove (11) to achieve axial sliding cooperation of the first transmission member (3) along the traction rod (1).

7. A thermally trip adjustable tripping mechanism according to claim 2, characterized in that The first driving portion (31) comprises a plurality of driving surfaces (311), at least one driving surface (311) can be driven to trip by a thermal release, and the distances between different driving surfaces (311) and the thermal release are different.

8. A thermally trip adjustable tripping mechanism according to claim 2, characterized in that A groove (42) and a protrusion (21) are provided at the mating surface between the first adjusting member (4) and the bracket (2); the first adjusting member (4) is arranged to pass through the bracket (2) and when rotating, the protrusion (21) disengages from the groove (42), so that the first adjusting member (4) slides relative to the bracket along the axial direction of the first adjusting member (4).

9. A thermally trip adjustable tripping mechanism according to claim 8, characterized in that It also includes an elastic member (43), the elastic member (43) being arranged between the first adjusting member (4) and the bracket (2), the elastic member (43) having the function of driving the first adjusting member (4) to approach the bracket (2) so as to limit the position of the first transmission member (3).

10. A thermally trip adjustable tripping mechanism according to claim 2, characterized in that It also includes a limit block (44) disposed on the first adjustment member (4) and used to cooperate with the bracket (2) to achieve rotational limit of the first adjustment member (4).

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