Circuit breaker static contact system assembling clamp

Abstract

The utility model discloses a circuit breaker static contact system assembling clamp which comprises two handles, the two handles are hinged through a rotating shaft, an upper driving arm and a lower driving arm are formed on one side, an upper clamping arm and a lower clamping arm are formed on the other side, and the size of a clamping opening between the upper clamping arm and the lower clamping arm is adjusted through the upper driving arm and the lower driving arm. A first groove matched with a static contact spring of the contact device is formed in the upper surface of the front portion of the lower clamping arm, a notch with a forward opening is formed in the middle of the lower clamping arm, the notch is matched with a spring arm extending out of the middle of the static contact spring, and a pair of protruding columns arranged in the transverse direction are arranged at the front end of the upper clamping arm. Second grooves matched with the two side walls of a U-shaped support of the contact device are formed in the lower surfaces of the convex columns, and the width of the lower clamping arm is smaller than the distance between the two side walls of the U-shaped support. According to the utility model, the assembly of the static contact system can be rapidly completed in a narrow space, the labor-saving lever principle is utilized, the assembly is simple and labor-saving, and the assembly efficiency and quality are improved.

Description

Technical Field

[0001] The utility model relates to an assembly fixture for a static contact system of a circuit breaker. Background Art

[0002] Chinese patent number CN201420779405.5 discloses a contact device with a reversible static contact for a circuit breaker, which includes a static contact bracket, a static contact, a static contact spring (torsion spring) and a positioning shaft. The static contact bracket is U-shaped, and the static contact is fixed in the static contact bracket. Positioning holes are provided on both side walls of the static contact bracket, and a mounting hole is provided on the bottom for mounting the spring arm extending from the middle of the static contact spring. The static contact spring is fixed by passing the positioning shaft through the two positioning holes, so that the static contact is fixed.

[0003] During the actual installation process, the installer needs to use one hand to adjust the static contact spring to the same axis as the positioning hole, and use the other hand to pass the positioning shaft through the positioning hole on the static contact bracket and the static contact spring. However, due to the large torsional force of the static contact spring, it is difficult to align the axis by manual operation during the assembly process, resulting in very low assembly efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a circuit breaker static contact system assembly fixture with simple structure, low cost, labor-saving installation and high assembly efficiency.

[0005] The purpose of the utility model is achieved through the following technical measures: A circuit breaker static contact system assembly fixture, comprising two handles, the two handles are hinged by a rotating shaft, one side forms an upper driving arm and a lower driving arm, and the other side forms an upper clamping arm and a lower clamping arm, the size of the clamping gap between the upper clamping arm and the lower clamping arm is adjusted by the upper driving arm and the lower driving arm, a first groove adapted to the static contact spring of the contact device is provided on the front upper surface of the lower clamping arm, and a notch opening forward is provided in the middle of the lower clamping arm, the notch is adapted to the spring arm extending from the middle of the static contact spring, characterized in that a pair of protrusions arranged in the transverse direction are provided at the front end of the upper clamping arm, and a second groove adapted to the two side walls of the U-shaped bracket of the contact device is provided on the lower surface of the pair of protrusions, and the width of the lower clamping arm is less than the distance between the two side walls of the U-shaped bracket.

[0006] The utility model clamps the static contact through the spring arms on both sides of the static contact spring, and uses the fulcrum generated by the cooperation of the upper clamping arm and the U-shaped bracket to form a longer force arm structure. By rotating the clamp clockwise, the spring arm in the middle of the static contact spring can be easily placed into the limiting hole, and the assembly of the static contact system can be quickly completed in a small space. The principle of labor-saving lever is used, and the assembly is simple and labor-saving, thereby improving the assembly efficiency and quality.

[0007] The length of the upper driving arm is greater than the length of the upper clamping arm, the length of the lower driving arm is greater than the length of the lower clamping arm, the driving arm is longer than the clamping arm, and the force-saving lever principle is utilized to save the clamping force required to be applied by an assembly personnel.

[0008] The utility model discloses between the upper driving arm with the lower driving arm is equipped with counterforce spring.

[0009] The utility model discloses counterforce spring is close to hinged point.

[0010] The utility model discloses the cross section shape of first recess is semicircular arc.

[0011] The utility model discloses the cross section shape of second recess is rectangle.

[0012] Compared with prior art, the utility model has following outstanding effects:

[0013] (1) the utility model is through the spring arm of static contact spring both sides and is stuck static contact, utilizes the fulcrum that the upper clamping arm and U-shaped support cooperation produces, forms longer force arm structure, clockwise rotates the fixture, can easily put the spring arm of static contact spring middle into the limiting hole, can complete the assembly of static contact system in the narrow space, utilizes the force-saving lever principle, and the assembly is simple and laborsaving, improves assembly efficiency and quality.

[0014] (2) the utility model rationally designs the shape of first recess, makes it and static contact spring appearance adapt, need not manual adjustment static contact spring's position when using.

[0015] (3) the utility model sets up counterforce spring between the upper driving arm and the upper driving arm, under the condition of not being forced, the mouth of fixture always keeps open state, and the static contact spring is convenient to place.

[0016] (4) the utility model simple structure, low in cost, strong practicality is suitable for extensive promotion and use. DRAWINGS

[0017] The utility model will be further explained in detail in connection with the drawings and specific embodiment.

[0018] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0019] Figure 2 It is the three-dimensional structure schematic diagram of the utility model in placing static contact spring;

[0020] Figure 3 It is the three-dimensional structure schematic diagram of the utility model when placing static contact spring into contact device;

[0021] Figure 4This is a three-dimensional structural cross-sectional view of the utility model when the static contact spring is placed into the contact device;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the utility model when the clamping static contact spring is installed into the contact device;

[0023] In the figure: 1-upper driving arm; 2-lower driving arm; 3-rotating shaft; 4-upper clamping arm; 401-second groove; 402-boss; 5-lower clamping arm; 501-first groove; 502-notch; 6-static contact spring; 601-spring arm extending from the middle of the static contact spring; 602-spring arms extending from both sides of the static contact spring; 7-contact device; 701-U-shaped bracket; 702-static contact; 703-positioning shaft; 8-reaction spring. DETAILED DESCRIPTION

[0024] like Figures 1 to 5 As shown, the utility model is a circuit breaker static contact system assembly fixture. The overall structure is similar to a vise, including two handles. The two handles are hinged by a rotating shaft 3. One side forms an upper driving arm 1 and a lower driving arm 2, and the other side forms an upper clamping arm 4 and a lower clamping arm 5. The size of the clamping gap between the upper clamping arm 4 and the lower clamping arm 5 is adjusted by the upper driving arm 1 and the lower driving arm 2.

[0025] A first groove 501 is provided on the upper surface of the front part of the lower clamping arm 5, which is adapted to the static contact spring 6 of the contact device 7. The width of the first groove 501 is greater than the width of the static contact spring 6, which can clamp the static contact spring and the spring arm. A notch 502 opening forward is provided in the middle part of the lower clamping arm 5, and the notch 502 is adapted to the spring arm 601 extending from the middle of the static contact spring. A pair of protrusions 402 are provided along the transverse direction of the upper clamping arm 4, and a second groove 401 is provided on the lower surface of the pair of protrusions 402, which is adapted to the two side walls of the U-shaped bracket 701 of the contact device 7. The U-shaped bracket is clamped by the second groove 401, so that a longer force arm can be formed, so that a fulcrum can be generated between the upper clamping arm 4 and the U-shaped bracket 701 during use to form a labor-saving lever.

[0026] The width of the lower clamping arm 5 is smaller than the distance between the two side walls of the U-shaped bracket 701 of the contact system, so that the lower clamping arm 5 can extend between the two side walls of the U-shaped bracket 701 and the lower clamping arm 5 can rotate freely inside the contact system.

[0027] The length of the upper driving arm 1 is greater than that of the upper clamping arm 4, and the length of the lower driving arm 2 is greater than that of the lower clamping arm 5. The driving arm of the clamp is longer than the clamping arm, utilizing the principle that a longer force arm saves effort.

[0028] A counterforce spring 8 is arranged between the upper driving arm 1 and the lower driving arm 2 and close to the hinge point, and two ends of the counterforce spring 8 are respectively arranged in the cylindrical recesses on the upper driving arm 1 and the lower driving arm 2, and the assembly clamp always keeps the clamping opening in an open state in the non-force condition, thereby facilitating the placement of the static contact spring 6.

[0029] In order to better clamp the static contact spring 6, the first recess 501 is in a semicircular arc shape which is adapted to the outer shape of the static contact spring 6.

[0030] In order to better clamp the U-shaped support 701, the second recess 401 is in a rectangular shape which is adapted to the outer shape of the side wall of the U-shaped support 701.

[0031] The use process of the utility model is as follows:

[0032] During installation, the static contact spring 6 is arranged between the first recess 501 and the second recess 401, the spring arm 601 extending from the middle of the static contact spring is arranged in the notch 502 and extends downward from the lower surface of the lower clamping arm 5, the spring arms 602 extending from the two sides of the static contact spring are respectively arranged on the upper clamping arm 4, and the static contact spring is arranged in the contact device 7. Figure 2 The spring arms 602 extending from the two sides of the static contact spring are arranged in the contact device 7, the second recess 401 of the upper clamping arm 4 is overlapped on the side wall of the U-shaped support 701, a longer force arm structure is formed, force is then applied to the upper driving arm 1 and the lower driving arm 2, the clamping opening between the upper clamping arm 4 and the lower clamping arm 5 is continuously reduced, the static contact spring 6 is fixed between the clamping openings, the circuit breaker clamp is rotated clockwise by a certain angle, the circuit breaker clamp is conveniently arranged in the limiting hole of the contact device 7, and finally the positioning shaft 703 is arranged in the contact device 7. Figures 3 to 5 .

[0033] The embodiments of the utility model are not limited to this, according to the above content of the utility model, according to the ordinary technical knowledge and the usual means of the art, under the premise that the above basic technical thought of the utility model is not departed from, the utility model can also make other various forms of modification, replacement or change, all fall within the protection scope of the utility model.

Claims

1. A fixture for assembling a circuit breaker static contact system, comprising two handles hingedly connected by a rotating shaft, one side forming an upper drive arm and a lower drive arm, and the other side forming an upper clamping arm and a lower clamping arm. The upper and lower drive arms are used to adjust the size of the clamping gap between the upper and lower clamping arms. A first groove is provided on the front upper surface of the lower clamping arm, adapted to mate with a static contact spring of a contact assembly. A notch is provided in the middle of the lower clamping arm, opening forward, adapted to mate with a spring arm extending from the middle of the static contact spring. The fixture is characterized by: A pair of protrusions are provided at the front end of the upper clamping arm along its transverse direction, and second grooves are provided on the lower surfaces of the pair of protrusions to match the two side walls of the U-shaped bracket of the contact device. The width of the lower clamping arm is smaller than the distance between the two side walls of the U-shaped bracket.

2. The circuit breaker static contact system assembly fixture according to claim 1, characterized in that: The length of the upper driving arm is greater than that of the upper clamping arm, and the length of the lower driving arm is greater than that of the lower clamping arm.

3. The circuit breaker static contact system assembly fixture according to claim 2, characterized in that: A reaction spring is provided between the upper driving arm and the lower driving arm.

4. The circuit breaker static contact system assembly fixture according to claim 3, characterized in that: The reaction spring is close to the hinge point.

5. The circuit breaker static contact system assembly fixture according to claim 4, characterized in that: The cross-section of the first groove is a semicircular arc.

6. The circuit breaker static contact system assembly fixture according to claim 5, characterized in that: The cross-sectional shape of the second groove is rectangular.

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