CN219758439U - Overload characteristic pre-adjustment gauge - Google Patents

Abstract

The embodiment of the utility model provides an overload characteristic pre-adjustment gauge which is used for a circuit breaker, wherein the circuit breaker comprises a traction rod and an adjusting screw, and the overload characteristic pre-adjustment gauge comprises: the baffle plate and the limiting structure are used between the traction rod and the adjusting screw; the limiting structure is fixedly connected with the partition plate and used for fixing the partition plate on the traction rod, and when the partition plate is fixed on the traction rod, the distance between the surface of the partition plate, which is close to the adjusting screw, and the traction rod is equal to the target distance between the traction rod and the adjusting screw. According to the embodiment of the utility model, the partition plate is arranged between the traction rod and the adjusting screw, so that errors generated when the distance between the adjusting screw and the traction rod is manually adjusted are reduced, the efficiency and the accuracy of pre-adjustment before overload and the like calibration test of the circuit breaker are ensured, the partition plate is fixed on the traction rod through the limiting structure, the influence on the accuracy of pre-adjustment due to the displacement of the partition plate is avoided, and the use reliability of the overload characteristic pre-adjustment detector is ensured.

Description

Overload characteristic pre-adjustment gauge

Technical Field

The embodiment of the utility model relates to the technical field of detection tools, in particular to an overload characteristic pre-adjustment detection tool.

Background

The circuit breaker is used for protecting the circuit under the conditions of short circuit, overload or undervoltage, and reduces the damage probability of the circuit, wherein the overload protection is mainly realized through an overload tripping component of the circuit breaker, the overload tripping component comprises a traction rod and an adjusting screw, in order to ensure the reliability of overload protection of the circuit breaker, before the circuit breaker leaves a factory, the overload tripping component is required to be subjected to overload alike calibration test, the circuit breaker is required to be preset before the overload alike calibration test is carried out, and the distance between the adjusting screw and the traction rod in the overload tripping component is manually adjusted by an operator to reach the target distance between the adjusting screw and the traction rod, but because the error is larger when the distance is manually adjusted, the test qualification rate of the circuit breaker is further influenced.

Disclosure of Invention

In view of the above problems, the embodiment of the utility model provides an overload characteristic pre-adjustment gauge, which comprises a baffle and a limiting structure, wherein the baffle is arranged between a traction rod and an adjusting screw, so that errors generated when the distance between the adjusting screw and the traction rod is manually adjusted are reduced, the efficiency and the accuracy of pre-adjustment of overload and the like of a circuit breaker are ensured, the test qualification rate of the circuit breaker is prevented from being influenced due to inaccurate pre-adjustment, the baffle is fixed on the traction rod through the limiting structure, the accuracy of pre-adjustment is prevented from being influenced due to displacement of the baffle, the test qualification rate of the circuit breaker is further prevented from being further influenced due to inaccurate pre-adjustment, and the use reliability of the overload characteristic pre-adjustment gauge is ensured.

A first aspect of an embodiment of the present utility model provides an overload characteristic pre-adjustment gauge for a circuit breaker, where the circuit breaker includes a traction rod and an adjusting screw, the overload characteristic pre-adjustment gauge includes a partition plate and a limiting structure, and the partition plate is disposed between the traction rod and the adjusting screw; the limiting structure is fixedly connected with the partition plate and used for fixing the partition plate on the traction rod, and when the partition plate is fixed on the traction rod, the distance between the surface of the partition plate, which is close to the adjusting screw, and the traction rod is equal to the target distance between the traction rod and the adjusting screw.

Optionally, the limit structure includes connecting portion and first limit portion, and first limit portion passes through connecting portion and is connected with the baffle, forms the joint mouth between baffle and the first limit portion for with the traction lever joint, with the baffle fixed on the traction lever.

Optionally, the first limiting portion is disposed parallel to the partition plate.

Optionally, when the clamping interface is clamped with the traction rod, one side surface of the partition plate is attached to the surface, close to the adjusting screw, of the traction rod, the other side surface of the partition plate faces the adjusting screw, and the distance between the surface, in contact with the traction rod, of the partition plate and the surface, facing the adjusting screw, of the partition plate is equal to the target distance between the traction rod and the adjusting screw.

Optionally, the first limiting part comprises a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are arranged perpendicular to the arrangement direction of the traction rod and the adjusting screw, and are respectively arranged at two ends of the partition plate, and a clamping interface is formed between the first limiting plate and the partition plate.

Optionally, the limiting structure further includes a second limiting portion, where the second limiting portion is configured to cooperate with the traction rod to limit a relative installation position of the spacer and the traction rod in a direction perpendicular to an arrangement direction of the traction rod and the adjusting screw.

Optionally, the second limiting portion includes a plurality of first protrusions disposed on a side of the spacer or the first limiting portion near the traction rod, and when the spacer is fixed on the traction rod, the traction rod is at least partially located between any two first protrusions, so as to limit a relative installation position of the spacer and the traction rod in an arrangement direction perpendicular to the traction rod and the adjusting screw.

Optionally, the second limiting portion includes a groove disposed on the partition board or the first limiting portion, and a second protrusion is disposed at a position of the traction rod corresponding to the groove, and is embedded in the groove.

Optionally, the portable electronic device further comprises a handle, wherein the handle is arranged in a direction opposite to the card interface.

Optionally, the overload characteristic pre-setting tool is provided with an identification for marking a circuit breaker adapted to the overload characteristic pre-setting tool.

According to the overload characteristic pre-adjustment detection tool provided by the embodiment of the utility model, the baffle is used between the traction rod and the adjusting screw, after the position of the baffle is fixed on the traction rod by the limiting structure, the relative position between the baffle and the traction rod is also fixed, the position of the adjusting screw can be used as a reference by taking the position of the baffle, when the adjusting screw is in contact with the baffle, the distance between the adjusting screw and the traction rod is equal to the distance between the surface of the baffle, which is close to the adjusting screw, of the baffle and the traction rod, so that the distance between the adjusting screw and the traction rod is accurately adjusted to the target distance, errors generated when the distance between the traction rod and the adjusting screw is manually adjusted are reduced, the efficiency and the accuracy of the overload characteristic of the circuit breaker are ensured, the baffle is fixed on the traction rod by arranging the limiting structure, the influence on the accuracy of the pre-adjustment caused by the displacement of the baffle is avoided, and the use reliability of the overload characteristic pre-adjustment detection tool is ensured.

The foregoing description is only an overview of the technical solutions of the embodiments of the present utility model, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present utility model can be more clearly understood, and the following specific embodiments of the present utility model are given for clarity and understanding.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a circuit breaker according to the present utility model;

fig. 2 is a diagram illustrating a circuit breaker and an overload characteristic pre-adjustment tool according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of an overload characteristic pre-adjustment gauge according to an embodiment of the present utility model;

FIG. 4 is a schematic view of another angle of the pre-adjustment fixture for overload feature according to the embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a traction rod according to an embodiment of the present utility model;

fig. 6 is a diagram illustrating a cooperation between a traction rod and an overload feature pre-adjustment tool according to an embodiment of the present utility model.

Reference numerals illustrate:

101. a traction rod; 111. a second protrusion; 102. an adjusting screw; 103. the overload characteristic pre-adjustment gauge; 301. a partition plate; 302. a first limit part; 321. a first limiting plate; 322. a second limiting plate; 303. a connection part; a card interface 331; 304. a second limit part; 305. a handle; 306. identification; l, target distance between the traction rod and the adjusting screw; t, the distance between the surface of the baffle close to the adjusting screw and the traction rod.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description and claims of the utility model and in the description of the drawings are intended to cover a non-exclusive inclusion.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The azimuth words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the overload characteristic pre-adjustment gauge of the present utility model. For example, in the description of the present utility model, the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to improve one or more of these features either explicitly or implicitly.

In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., as a "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., as a fixed connection, e.g., via a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

The circuit breaker is used for protecting a circuit under the conditions of short circuit, overload or undervoltage so as to reduce the damage probability of the circuit, wherein the overload protection is mainly realized through an overload tripping component of the circuit breaker, as shown in fig. 1, fig. 1 is a schematic structural diagram of the circuit breaker provided by the utility model, the overload tripping component comprises a traction rod 101 and an adjusting screw 102, when the circuit works normally, the axial end face of the adjusting screw 102 is abutted on the traction rod 101, and when the overload condition occurs in the circuit, a bimetallic strip in the circuit breaker deforms to drive the adjusting screw 102 to push the traction rod 101, so that the circuit breaker is in a circuit breaking state so as to protect the circuit. In the process, the time for the adjusting screw to push the traction rod is particularly important, and among many factors for determining the time for the adjusting screw to push the traction rod, the initial distance between the adjusting screw and the traction rod is extremely important, if the distance is large, the adjusting screw can not timely push the traction rod when in overload, so that a circuit can not be timely disconnected, and safety accidents are caused; if the distance is small, this in turn causes the adjustment screw to push against the drawbar when the circuit has not been overloaded or slightly overloaded (the trip timing has not been reached), thereby opening the circuit when it is not necessary to open the circuit.

In order to ensure the reliability of overload protection of the circuit breaker, before the circuit breaker leaves the factory, the overload tripping component must perform overload waiting test, the overload protection characteristic of the circuit breaker is tested through the overload waiting test, the qualification rate of the circuit breaker is checked, the circuit breaker is pre-adjusted before the overload waiting test is performed, the pre-adjustment is generally realized by manually adjusting the distance between the adjusting screw 102 and the traction rod 101 in the overload tripping component through an operator through experience, but the adjustment mode cannot ensure that the distance between the traction rod 101 and the adjusting screw 102 after one adjustment is the target distance required for the overload characteristic test, and finally the requirement can be met through multiple measurements and adjustment.

The target distance L between the pull rod 101 and the adjusting screw 102 refers to a distance between the adjusting screw 102 and the pull rod 101 when the overload characteristic of the circuit breaker is detected at the rated voltage of the circuit breaker, and a length direction of the pull rod 101 is perpendicular to a direction from the adjusting screw 102 to the pull rod 101; the thickness direction of the spacer 301 indicates the direction along the adjustment screw 102 to the drawbar 101.

In order to solve the above-mentioned problems, as shown in fig. 2 and 3, fig. 2 is a matching diagram of a circuit breaker and an overload characteristic pre-adjustment tool provided in an embodiment of the present utility model, and fig. 3 is a schematic structural diagram of an overload characteristic pre-adjustment tool provided in an embodiment of the present utility model, and the embodiment of the present utility model discloses an overload characteristic pre-adjustment tool 103 for a circuit breaker, where the circuit breaker includes a traction rod 101 and an adjusting screw 102, and the overload characteristic pre-adjustment tool 103 includes: the baffle 301 and the limit structure, the baffle 301 is used for being arranged between the traction rod 101 and the adjusting screw 102; the limiting structure is fixedly connected with the partition 301, and is used for fixing the partition 301 on the traction rod 101, and when the partition 301 is fixed on the traction rod 101, the distance T between the surface of the partition 301, which is close to the adjusting screw 102, and the traction rod 101 is equal to the target distance L between the traction rod 101 and the adjusting screw 102.

The limiting structure may include a plate-like structure disposed parallel to the partition 301, the plate-like structure cooperating with the partition 301 to be engaged with the traction rod 101 to limit a position between the partition 301 and the traction rod 101 in a thickness direction of the partition 301. The limiting structure may further include a plurality of limiting points disposed on the partition 301 along the length direction of the traction rod 101, where the traction rod 101 is at least partially disposed between any two limiting points, so as to limit the position between the partition 301 and the traction rod 101 along the length direction of the traction rod 101, reduce the possibility of shaking between the traction rod 101 and the partition 301, and ensure the use reliability of the partition 301.

In the embodiment of the utility model, when the baffle 301 is fixed on the traction rod 101, the baffle 301 is positioned between the traction rod 101 and the adjusting screw 102, and one side of the baffle 301 is in contact with the traction rod 101, so that when the preset for detecting the overload characteristic is performed, an operator controls the adjusting screw 102 to be in contact with the baffle 301, and as the distance T between the surface of the baffle 301 close to the adjusting screw 102 and the traction rod 101 is equal to the target distance L between the traction rod 101 and the adjusting screw 102, when the adjusting screw 102 is in contact with the baffle 301, the actual distance between the adjusting screw 102 and the traction rod 101 is ensured to be the target distance L between the traction rod 101 and the adjusting screw 102, and the accuracy and the efficiency of the preset are ensured; through setting up limit structure with baffle 301 fixed on traction lever 101, avoid taking place the mutual displacement between baffle 301 and the traction lever 101, lead to the distance between baffle 301 and the traction lever 101 to change, cause and adjust back to adjusting screw 102 with the position of baffle 301 as the benchmark, the deviation takes place for the distance T between adjusting screw 102 and the traction lever 101, and then influences the accuracy of preset.

In the above implementation manner, at least one of the partition 301 and the limiting structure is in contact with the traction rod 101, when one of the partition 301 and the limiting structure is in contact with the traction rod 101, and when an operator adjusts the distance between the adjusting screw 102 and the traction rod 101, an external force is applied to the partition 301 by the adjusting screw 102, so that the partition 301 is simultaneously in contact with the traction rod 101 and the adjusting screw 102, and at this time, the actual distance between the adjusting screw 102 and the traction rod 101 is the target distance L between the traction rod 101 and the adjusting screw 102 required when the overload calibration test is performed on the circuit breaker; or a fixed point is provided in the limit structure to maintain a distance between the drawbar 101 and the bulkhead 301, and when the limit structure fixes the bulkhead 301 to the drawbar 101, a distance T between a surface of the bulkhead 301 adjacent to the adjusting screw 102 and the drawbar 101 is equal to a target distance L between the drawbar 101 and the adjusting screw 102.

It should be noted that, when the circuit breaker is provided with the plurality of adjustment screws 102 arranged in the direction parallel to the length direction of the traction rod 101, the size of the spacer 301 may be larger than the distance between the first adjustment screw 102 and the last adjustment screw 102 along the length direction of the traction rod 101, which is not limited in the embodiment of the present utility model.

In order to facilitate the processing and manufacturing of the overload characteristic pre-adjustment gauge 103, the use precision of the overload characteristic pre-adjustment gauge 103 is ensured, and the limiting structure is fixedly connected with the partition 301 or integrally formed, so that the influence on the reduction of the precision of the adjustment of the distance T between the adjusting screw 102 and the traction rod 101 due to the clearance between the limiting structure and the partition 301 is avoided, and the use reliability of the overload characteristic pre-adjustment gauge 103 is further influenced.

In a specific embodiment, as shown in fig. 2 and 3, the limiting structure includes a connecting portion 303 and a first limiting portion 302, the first limiting portion 302 is connected to the partition 301 through the connecting portion 303, and a clamping interface 331 is formed between the partition 301 and the first limiting portion 302, and is used for clamping with the traction rod 101 so as to fix the partition 301 on the traction rod 101.

In the embodiment of the present utility model, the first limiting portion 302 may be a plate-shaped structure or a strip-shaped structure parallel to the partition 301, or may be a plate-shaped structure or a strip-shaped structure having an included angle with the partition 301, and the embodiment of the present utility model does not limit a specific implementation manner of the first limiting portion 302, only needs to be matched with the partition 301 and fix the partition 301 on the traction rod 101, and the first limiting portion 302, the partition 301 and the connection portion 303 together form a clamping interface 331, where the clamping interface 331 can enable the traction rod 101 to enter between the first limiting plate 321 and the partition 301, thereby fixing the partition 301 on the traction rod 101, reducing a possibility of mutual displacement between the partition 301 and the traction rod 101, and ensuring reliability of use of the overload characteristic pre-adjustment fixture 103. The connection portion 303 may be disposed on a side of the partition 301 away from the circuit breaker base, or may be disposed at two ends of the partition 301 along the length direction of the traction rod 101, and the location of the connection portion 303 is not particularly limited in the embodiment of the present utility model.

The connection portion 303 is used for connecting the partition 301 and the first limiting portion 302, so that a certain distance is kept between the partition 301 and the first limiting portion 302, and a space for clamping with the traction rod 101 is formed, so that the position of the traction rod 101 is limited in the direction perpendicular to the arrangement direction of the traction rod 101 and the adjusting screw 102, when the traction rod 101 enters from the clamping interface 331 and the traction rod 101 abuts against the connection portion 303, the traction rod 101 stops relative movement between the partition 301 and the traction rod 101 when the traction rod 101 abuts against the connection portion 303, and therefore the mutual position between the partition 301 and the traction rod 101 is limited.

In one embodiment, the first limiting portion 302 is disposed parallel to the partition 301.

In this embodiment of the present utility model, the first limiting plate 321 and the partition 301 may be configured as parallel plate structures, where the first limiting plate 321 is connected to the partition 301 through the connection portion 303 to form a clamping interface 331, and when the clamping interface 331 is clamped to the traction rod 101, the first limiting plate 321 and the partition 301 are respectively contacted with two opposite surfaces of the traction rod 101, so as to define the mutual position of the partition 301 relative to the traction rod 101 along the arrangement direction of the traction rod 101 and the adjusting screw 102.

In the above implementation manner, the side of the first limiting plate 321 near the traction rod 101 and/or the side of the partition 301 near the traction rod 101 may be provided with protrusions, patterns or other structures capable of increasing friction force, so as to increase the friction force between the first limiting plate 321 and/or the partition 301 and the traction rod 101, reduce the possibility of relative displacement of the partition 301 relative to the traction rod 101 during the use process of the overload characteristic pre-adjustment tool 103, and further improve the use reliability of the overload characteristic pre-adjustment tool 103.

In one embodiment, when the clamping port 331 is clamped to the traction rod 101, one side surface of the partition 301 is attached to the surface of the traction rod 101 close to the adjusting screw 102, the other side surface is opposite to the adjusting screw 102, and the distance between the surface of the partition 301 contacting the traction rod 101 and the surface of the partition 301 opposite to the adjusting screw 102 is equal to the target distance L between the traction rod 101 and the adjusting screw 102. (iterate many times)

In the embodiment of the present utility model, the partition 301 may be configured as a flat plate, and one side of the first limiting portion 302 away from the traction rod 101 is parallel to the plane of the partition 301, and one side of the first limiting portion 302 close to the traction rod 101 is attached to one side of the traction rod 101 close to the first limiting portion 302, so as to further reduce the possibility that the partition 301 shakes between the traction rod 101 and the adjusting screw 102, and ensure the reliability of the overload characteristic pre-adjustment gauge 103. When the clamping interface 331 is clamped with the traction rod 101, the traction rod 101 contacts with one side of the partition board 301, and an operator controls the adjusting screw 102 to enable the axial end face of the adjusting screw 102 to contact with the other side of the partition board 301, so that the distance between the contact surface of the partition board 301 with the traction rod 101 and the surface of the partition board 301 opposite to the adjusting screw 102 is equal to the target distance L between the traction rod 101 and the adjusting screw 102, and efficiency and accuracy of overload characteristic pre-detection are improved.

In one embodiment, as shown in fig. 3, the first limiting portion 302 includes a first limiting plate 321 and a second limiting plate 322, where the first limiting plate 321 and the second limiting plate 322 are arranged perpendicular to the arrangement direction of the traction rod 101 and the adjusting screw 102, and are respectively disposed at two ends of the partition 301, and form a clamping interface 331 with the partition 301.

In the embodiment of the utility model, the first limiting plate 321 and the second limiting plate 322 are arranged at two ends of the partition 301 along the length direction of the traction rod 101, so that the use of a whole limiting plate matched with the partition 301 to limit the mutual positions between the traction rod 101 and the partition 301 is avoided, the material consumption of the first limiting part 302 is reduced, and the manufacturing cost of the overload characteristic pre-adjustment gauge 103 is reduced. And two clamping interfaces 331 are formed between the first limiting plate 321 and the second limiting plate 322 and the partition 301 respectively, which illustrate that the overload characteristic pre-adjustment gauge 103 and the traction rod 101 have two clamping positions, so that in the using process of the overload characteristic pre-adjustment gauge 103, two ends of the traction rod 101 are respectively limited along the length direction of the traction rod 101, and the limitation of the mutual positions between the partition 301 and the traction rod 101 is more stable.

The foregoing embodiment discloses various structures for fixing the overload characteristic pre-adjustment tool 103 relative to the traction rod 101, but during actual use, sometimes the position between the overload characteristic pre-adjustment tool 103 and the traction rod 101 along the length direction of the traction rod 101 needs to be limited, otherwise, the situation that the partition 301 is separated from the position between the traction rod 101 and the adjusting screw 102 may occur, and in this regard, in a specific embodiment, as shown in fig. 4, fig. 4 is a schematic structural diagram of another angle of the overload characteristic pre-adjustment tool provided in the embodiment of the present utility model, and the limiting structure further includes a second limiting portion 304, where the second limiting portion 304 is used to cooperate with the traction rod 101 to limit the relative installation position of the partition 301 and the traction rod 101 along the length direction of the traction rod 101.

The second limiting portion 304 may be a protrusion disposed on the partition 301 or the first limiting portion 302, or may be a groove disposed on the partition 301 or the first limiting portion 302, and if the second limiting portion 304 is a protrusion disposed on the partition 301 or the first limiting portion 302 near the traction rod 101, the traction rod 101 is provided with a groove corresponding to the protrusion; if the second limiting portion 304 is a groove disposed on the side of the partition 301 near the traction rod 101 or on the first limiting portion 302, a protrusion is disposed on the traction rod 101 corresponding to the groove, and in the use process of the overload characteristic pre-adjustment tool 103, the protrusion and the groove disposed between the partition 301 and the traction rod 101 and/or the protrusion and the groove disposed between the first limiting portion 302 and the traction rod 101 are mutually matched, so that the possibility that the partition 301 is displaced relative to the traction rod 101 and the adjusting screw 102 and each other along the length direction of the traction rod 101 is reduced, the partition 301 is prevented from being separated from the position between the traction rod 101 and the adjusting screw 102 due to the external force in the use process, and the reliability of the overload characteristic pre-adjustment tool 103 is further ensured.

In a specific embodiment, the second limiting portion 304 includes a plurality of first protrusions disposed on the side of the partition 301 or the first limiting portion 302 near the traction rod 101, and when the partition 301 is fixed on the traction rod 101, the traction rod 101 is at least partially located between any two of the first protrusions, so as to limit the relative installation position of the partition 301 and the traction rod 101 along the length direction of the traction rod 101.

By arranging a plurality of first protrusions at the side of the partition 301 or the first limiting portion 302 near the traction rod 101, corresponding to the position of the traction rod 101, so that the traction rod 101 is at least partially located between any two first protrusions, where the traction rod 101 is at least partially located between any two first protrusions, including that the traction rod 101 is partially located between the first protrusions and/or the traction rod 101 is fully located between the two first protrusions along the length direction, the first protrusions may be located at both ends of the partition 301 or the first limiting portion 302 along the length direction of the traction rod 101, and at this time the traction rod 101 is located between the two first protrusions; the first protrusions may also be disposed at a middle position of the partition 301 or the first limiting portion 302 corresponding to any protruding or recessed structure on the middle of the traction rod 101, so that the protruding or recessed structure on the traction rod 101 is clamped between the two first protrusions, so as to reduce the possibility of shaking the partition 301 relative to the traction rod 101, it should be noted that when the traction rod 101 is at least partially disposed between any two first protrusions, the traction rod 101 may or may not contact the two first protrusions, if the traction rod 101 does not contact the first protrusions, it means that a movement allowance is allowed between the two first protrusions of the traction rod 101, when the traction rod 101 moves parallel to the length direction of the traction rod 101, the movement allowance is respectively contacted with any one of the two first protrusions, so as to limit the movement position of the traction rod 101 relative to the partition 301 along the length direction of the traction rod 101, and the selection of the protruding or recessed structure on the traction rod 101 is not limited as long as the cooperation between the first protrusions and the traction rod does not affect the cooperation of the traction rod with other parts.

In a specific embodiment, as shown in fig. 3, fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of a traction rod provided in an embodiment of the present utility model, fig. 6 is a matching diagram of a traction rod and an overload characteristic pre-adjustment tool provided in an embodiment of the present utility model, the second limiting portion 304 includes a groove disposed on the partition 301 or the first limiting portion 302, a second protrusion 111 is disposed at a position of the traction rod 101 corresponding to the groove, and the second protrusion 111 is embedded in the groove, where the second protrusion 111 may be a structure on the traction rod 101 with a function, or a structure specially disposed for defining a mutual position between the partition 301 and the traction rod 101 in cooperation with the groove.

In the embodiment of the present utility model, the second limiting portion 304 includes a groove disposed on the partition 301 or the first limiting portion 302, and the traction rod 101 is provided with a second protrusion 111 corresponding to the groove. If the groove is arranged on one side of the partition 301 close to the traction rod 101, a second protrusion 111 is correspondingly arranged on one side of the traction rod 101 close to the partition 301 and is clamped with the groove arranged on the partition 301; if the groove is arranged on the first limiting part 302, a second protrusion 111 is arranged on one side of the traction rod 101, which is close to the first limiting part 302, corresponding to the groove, and is clamped with the groove arranged on the first limiting part 302, so that the mutual positions of the traction rod 101 and the groove are limited, and the possibility of relative displacement between the partition 301 and the traction rod 101 is reduced.

To facilitate the use of the overload feature pre-adjustment tool 103, in one embodiment, as shown in fig. 4, the overload feature pre-adjustment tool 103 further includes a handle 305, where the handle 305 is disposed away from the card interface 331. When the clamping port 331 is disposed at a side far away from the base along the arrangement direction of the traction rod 101 and the adjusting screw 102, the handle 305 is disposed on the partition 301 and is disposed away from the clamping port 331, and by disposing the handle 305, an operator can conveniently pick up or put down the overload characteristic pre-adjustment tool 103, so that the operator can conveniently place the overload characteristic pre-adjustment tool 103 between the traction rod 101 and the adjusting screw 102.

In a specific embodiment, as shown in fig. 4, in order to facilitate finding the overload characteristic pre-adjustment tool 103 corresponding to the circuit breaker, the overload characteristic pre-adjustment tool 103 is provided with a mark 306, where the mark 306 is used to mark the circuit breaker matched with the overload characteristic pre-adjustment tool 103, and the mark 306 may be disposed on the handle 305, or other positions of the overload characteristic pre-adjustment tool 103, which is not limited in this embodiment of the present utility model. It should be noted that, the identifier 306 may be a rated working current of the circuit breaker, a rated working voltage of the circuit breaker, or other identifiers 306 that may correspond to the circuit breaker, and the embodiment of the present utility model is not limited to the specific form of the identifier 306.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The utility model may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of first, second, third, etc. does not denote any order, and the words are to be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specifically stated.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. An overload characteristic pre-adjustment gauge for a circuit breaker, the circuit breaker comprising a drawbar and an adjusting screw, characterized in that the overload characteristic pre-adjustment gauge comprises:

the baffle is used for being arranged between the traction rod and the adjusting screw;

and the limiting structure is fixedly connected with the partition plate and used for fixing the partition plate on the traction rod, and when the partition plate is fixed on the traction rod, the distance between the surface of the partition plate, which is close to the adjusting screw, and the traction rod is equal to the target distance between the traction rod and the adjusting screw.

2. The tool of claim 1, wherein the limiting structure comprises a connecting portion and a first limiting portion, the first limiting portion is connected with the partition plate through the connecting portion, and a clamping interface is formed between the partition plate and the first limiting portion and is used for being clamped with the traction rod so as to fix the partition plate on the traction rod.

3. The pre-adjustment fixture for overload characteristics according to claim 2, wherein the first limiting portion is provided in parallel to the partition plate.

4. The tool according to claim 3, wherein when the clamping interface is clamped with the traction rod, one side surface of the partition plate is attached to a surface of the traction rod, which is close to the adjusting screw, and the other side surface of the partition plate is opposite to the adjusting screw, and a distance between a surface of the partition plate, which is in contact with the traction rod, and a surface of the partition plate, which is opposite to the adjusting screw, is equal to a target distance between the traction rod and the adjusting screw.

5. The tool for pre-adjusting overload characteristics according to claim 2, wherein the first limiting portion comprises a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are arranged perpendicular to the arrangement direction of the traction rod and the adjusting screw, are respectively arranged at two ends of the partition plate, and respectively form the clamping interface with the partition plate.

6. The pre-adjustment fixture for overload characteristic according to claim 2, wherein the limiting structure further comprises a second limiting portion for cooperating with the drawbar to limit the relative installation position of the partition plate and the drawbar in a direction perpendicular to the arrangement direction of the drawbar and the adjusting screw.

7. The pre-adjustment fixture for overload characteristic according to claim 6, wherein the second limiting portion includes a plurality of first protrusions provided on a side of the spacer or the first limiting portion close to the drawbar, the drawbar being located at least partially between any two of the first protrusions when the spacer is fixed to the drawbar, so as to limit a relative installation position of the spacer and the drawbar in a direction perpendicular to an arrangement direction of the drawbar and the adjusting screw.

8. The pre-adjustment fixture for overload characteristics according to claim 6, wherein the second limiting portion comprises a groove arranged on the partition board or the first limiting portion, and a second protrusion is arranged at a position of the traction rod corresponding to the groove, and is embedded into the groove.

9. The tool of claim 2, further comprising a handle disposed away from the interface.

10. The overload feature preconditioning tool as claimed in any of claims 1 to 9, characterized in that the overload feature preconditioning tool is provided with an identification for marking a circuit breaker adapted to the overload feature preconditioning tool.