Assembly jig for moving contact assembly of circuit breaker

Abstract

The utility model belongs to the technical field of circuit breaker production equipment, in particular to an assembling jig for a circuit breaker moving contact assembly, which comprises a jig base provided with a positioning station, and the positioning station comprises a first positioning part, a second positioning part, a third positioning part and a fourth positioning part which are respectively used for positioning a moving contact, an iron assembly, a plastic part and a pin. A positioning groove and a positioning protruding block of the first positioning part are matched with a bending part at the head end of the moving contact to achieve accurate limiting, a concave positioning block of the second positioning part is matched with a magnet, a stable iron assembly, a containing groove of the third positioning part, a slope, a supporting groove and a positioning rod cooperate, the installation accuracy of a plastic part is guaranteed, and a positioning penetrating hole of the fourth positioning part restrains a pin. According to the utility model, through precisely limiting each part, the installation precision of the moving contact assembly is significantly improved, the reject ratio of products is effectively reduced, the product quality is greatly improved, and the ever-increasing high-quality requirements of the products are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of circuit breaker production equipment technology, and specifically relates to an assembling jig for a circuit breaker moving contact assembly. BACKGROUND

[0002] A circuit breaker is a key control device in a power system, and is used for closing, carrying and breaking current, and can automatically cut off abnormal current to prevent circuit failure from expanding and protect the safety of a power grid and equipment, and is widely applied in the fields of power, communication, transportation and building, wherein a moving contact assembly is an important component of the circuit breaker, and the assembling jig is required during production and assembly of the moving contact assembly.

[0003] The existing circuit breaker comprises a shell, a moving contact assembly and the like, and the moving contact assembly comprises a moving contact, a copper wire, an iron assembly, a torsion spring, a plastic part and a pin shaft; during production of the circuit breaker, the components of the moving contact assembly need to be placed in the correct positions in the assembling jig for assembly.

[0004] The current moving contact assembly assembling jig has the following shortcomings: the current jig has poor positioning accuracy for the moving contact assembly, which leads to difficulty in guaranteeing the overall installation accuracy, and further affects the stability of internal circuit connection of the circuit breaker, resulting in fluctuation of electrical performance, and thus cannot meet the increasing demand for high-quality products; therefore, the assembling jig for the circuit breaker moving contact assembly is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the deficiencies of the existing moving contact assembly assembling jig, the assembling jig for the circuit breaker moving contact assembly is proposed.

[0006] The utility model discloses a kind of assembling jigs for circuit breaker moving contact assembly, it is including jig base, the jig base is provided with the positioning station for placing moving contact assembly, the positioning station includes the first positioning part for positioning moving contact, the second positioning part for positioning iron assembly, the third positioning part for positioning plastic part, and the fourth positioning part for positioning pin.

[0007] Preferably, the first positioning part includes a positioning groove opened in the jig base, and a positioning protrusion adapted to the first end bending part of the moving contact is arranged at the inner bottom end of the positioning groove.

[0008] Preferably, the second positioning part includes a concave positioning block, the inner concave structure of the concave positioning block is adapted to the protruding part on the iron assembly, and a magnet is assembled in the inner concave structure of the concave positioning block, and the top end of the magnet is flush with the inner concave structure of the concave positioning block.

[0009] Preferably, a positioning groove is formed on the side arm of the concave positioning block near the moving contact, which is matched with the end bending part of the moving contact.

[0010] Preferably, the third positioning part comprises a containing groove formed on the jig base and matched with the plastic part, the side wall of the containing groove is a slope matched with the inclined surface of the plastic part, one side of the inner wall of the containing groove is provided with a supporting groove for supporting the plastic part, the supporting groove acts on the convex column on the plastic part, and the L-shaped bending part on the plastic part is in abutment with the top end of the side arm of the concave positioning block.

[0011] Preferably, the third positioning part further comprises a first positioning rod and a second positioning rod which are slidably arranged on the jig base and matched with the first positioning hole and the second positioning hole on the plastic part, the first positioning rod and the second positioning rod are inserted into the first positioning hole and the second positioning hole through the spring force provided on the jig base, and the other ends of the first positioning rod and the second positioning rod are both provided with an opening disc.

[0012] Preferably, the entrances of the first positioning hole and the second positioning hole are both provided with a flared mouth, and the insertion ends of the first positioning rod and the second positioning rod are both provided with an arc-shaped chamfer matched with the flared mouth.

[0013] Preferably, the fourth positioning part comprises a first positioning through hole and a second positioning through hole formed on the jig base and matched with the pin, and a notch is formed at the top of one end of the first positioning through hole.

[0014] Preferably, a bevel is formed on the edge of the assembly entrance of the jig base located at the first positioning part, the second positioning part, the third positioning part and the fourth positioning part.

[0015] The utility model discloses a circuit breaker moving contact assembly's assembly jig, the circuit breaker moving contact assembly assembly jig of the utility model accurately positions each part of moving contact assembly, guarantees installation accuracy, and the positioning groove of the first positioning part is matched with the positioning bump of moving contact first end bending part, limits vertical and horizontal displacement, ensures that moving contact first end positioning is accurate.

[0016] The utility model provides a kind of assembly jig of circuit breaker moving contact assembly, the circuit breaker moving contact assembly assembly jig of the utility model accurately positions each part of moving contact assembly, guarantees installation accuracy, and the positioning groove of the first positioning part is matched with the positioning bump of moving contact first end bending part, limits vertical and horizontal displacement, ensures that moving contact first end positioning is accurate. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are intended to provide further understanding of the present application, form a part of the application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 is a structural perspective view of the jig base of the present application as a whole;

[0019] Figure 2 is Figure 1 is an enlarged view of structure at A in

[0020] Figure 3 is a structural perspective view of the jig base and the movable contact assembly of the present application;

[0021] Figure 4 is Figure 3 is a sectional view of

[0022] Figure 5 is a structural plan view of the positioning station and the movable contact assembly of the present application;

[0023] Figure 6 is an exploded structural perspective view of the movable contact assembly of the present application;

[0024] Legend:

[0025] 1, jig base; 2, positioning station; 201, first positioning part; 2011, positioning groove; 2012, positioning protrusion; 202, second positioning part; 2021, concave positioning block; 20211, positioning recess; 2022, magnet; 203, third positioning part; 2031, accommodating groove; 2032, slope; 2033, supporting groove; 2034, first positioning rod; 2035, second positioning rod; 2036, opening disc; 204, fourth positioning part; 2041, first positioning through hole; 2042, second positioning through hole; 2043, notch; 3, bevel; 01, movable contact assembly; 011, movable contact; 0111, first end bending part; 0112, last end bending part; 013, iron assembly; 0131, protruding part; 014, plastic part; 0141, inclined surface; 0142, protruding column; 0143, first positioning hole; 0144, second positioning hole; 0145, L-shaped bending part; 015, pin. DETAILED DESCRIPTION

[0026] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0027] Specific embodiments are given below.

[0028] Please refer to Figures 1-6The utility model provides a kind of assembly fixture of circuit breaker moving contact component, including jig base 1, positioning station 2 for placing moving contact component 01 is provided on the jig base 1, the positioning station 2 includes the first positioning part 201 for positioning moving contact 011, the second positioning part 202 for positioning iron component 013, the third positioning part 203 for positioning plastic part 014, and the fourth positioning part 204 for positioning pin 015, the first positioning part 201 includes the positioning groove 2011 being opened in jig base 1, the inside bottom of the positioning groove 2011 is provided with the positioning lug 2012 being adapted with the first end bending portion 0111 on moving contact 011, the second positioning part 202 includes concave positioning block 2021, the inner recess structure of the concave positioning block 2021 is adapted with the protruding portion 0131 on iron component 013, the second positioning part 202 further includes magnet 2022 being assembled in the inner recess structure of concave positioning block 2021, the top of the magnet 2022 is flush with the inner recess structure on concave positioning block 2021, the positioning groove 20211 being adapted with the last end bending portion 0112 on moving contact 011 is opened in the side arm of the concave positioning block 2021 close to moving contact 011;When working, under the scene of automatic assembly, by external automated equipment such as jaw, accurately grab moving contact 011, according to preset path and procedure, it is moved to the positioning station 2 of jig base 1, when moving contact 011 is close to the first positioning part 201, the first end bending portion 0111 of moving contact 011 will interact with the positioning lug 2012 of the bottom of positioning groove 2011, since the accurate adaptation of shape and size, positioning lug 2012 can effectively support moving contact 011 from vertical direction, limit vertical displacement, in horizontal direction, positioning lug 2012 cooperates with first end bending portion 0111, restricts the horizontal movement of the first end of moving contact 011, ensures its first end position stable, then external automated equipment grabs iron component 013 and moves to the vicinity of second positioning part 202, the protruding portion 0131 of iron component 013 is accurately corresponding with the inner recess structure of concave positioning block 2021, when protruding portion 0131 reaches the inner recess structure area, it is smoothly embedded in the inner recess structure, at this time, concave positioning block 2021 limits iron component 013 from multiple horizontal directions, prevents its translation or rotation on horizontal plane, simultaneously, the magnet 2022 in the inner recess structure of concave positioning block 2021 utilizes magnetic field to generate strong adsorption force to iron component 013, further stabilizes the position of iron component 013, reduces the risk that iron component 013 position deviates due to equipment slight shaking or environmental interference in assembly process.When the moving contact 011 and the iron assembly 013 are positioned respectively, the end bending part 0112 of the moving contact 011 is accurately embedded in the positioning recess 20211 of the side arm of the concave positioning block 2021 at the same time, the groove wall of the positioning recess 20211 constrains the end bending part 0112, so that the moving contact 011 and the iron assembly 013 keep accurate relative position relationship, meet specific spacing and angle requirements, lay a solid foundation for subsequent automatic assembly process, through the structure design of the utility model, the positioning accuracy of the moving contact 011 and the iron assembly 013 is remarkably improved, in traditional manual assembly, positioning deviation caused by human factors is difficult to avoid, and product quality is unstable, but in automatic production, cooperating with the assembly jig, the positioning accuracy of the moving contact 011 and the iron assembly 013 can be controlled within a very small tolerance range, the product failure rate is greatly reduced, and the product quality is greatly improved.

[0029] Further, the third positioning part 203 comprises a containing groove 2031 opened on the jig base 1 and matched with the plastic part 014, a side wall of the containing groove 2031 is a slope 2032 matched with the inclined surface 0141 on the plastic part 014, one side of an inner wall of the containing groove 2031 is provided with a supporting groove 2033 for supporting the plastic part 014, the supporting groove 2033 acts on the convex column 0142 on the plastic part 014, an L-shaped bending part on the plastic part 014 abuts against a side arm top end of the concave positioning block 2021, the third positioning part 203 further comprises a first positioning rod 2034 and a second positioning rod 2035 slidingly arranged on the jig base 1, the first positioning rod 2034 and the second positioning rod 2035 are respectively matched with the first positioning hole 0143 and the second positioning hole 0144 on the plastic part 014, the first positioning rod 2034 and the second positioning rod 2035 are inserted into the first positioning hole 0143 and the second positioning hole 0144 through spring force arranged on the jig base 1, the other end of the first positioning rod 2034 and the second positioning rod 2035 is respectively provided with an opening disc 2036, an entrance of the first positioning hole 0143 and the second positioning hole 0144 is respectively provided with a flared opening, and the insertion end of the first positioning rod 2034 and the second positioning rod 2035 is respectively provided with an arc-shaped chamfer matched with the flared opening.When working, the automation equipment grabs the plastic part 014, transports it above the accommodating groove 2031 of the jig base 1, and then the external equipment opens the first positioning rod 2034 and the second positioning rod 2035 by pushing the opening disc 2036, the spring is compressed, and the plastic part 014 above is provided with a falling space, the slope 2032 of the side wall of the accommodating groove 2031 is accurately matched with the inclined surface 0141 of the plastic part 014, when the plastic part 014 approaches the accommodating groove 2031 under the operation of the automation equipment, the slope 2032 generates a guiding force on the plastic part 014, guiding it to accurately fall into the accommodating groove 2031 in a specific direction, effectively avoiding the situation that the plastic part 014 is placed inaccurately due to equipment operation errors, after the plastic part 014 falls into the accommodating groove 2031, the position and shape of the supporting groove 2033 are accurately matched with the protruding column 0142 on the plastic part 014, the protruding column 0142 is embedded in the supporting groove 2033, the supporting groove 2033 provides stable support force for the plastic part 014 from below, so that it remains stable in the vertical direction, preventing sinking or shaking due to gravity, at the same time, the L-shaped bending part of the plastic part 014 is abutted against the top end of the side arm of the concave positioning block 2021 under the operation of the automation equipment, the top end of the side arm of the concave positioning block 2021 generates a horizontal reaction force on the L-shaped bending part 0145, which restricts the position of the plastic part 014 from the horizontal direction, achieving the preliminary positioning of the plastic part 014 in the two-dimensional plane, then the external equipment releases the opening disc 2036, at this time, under the action of the elastic potential energy release of the spring, the first positioning rod 2034 and the second positioning rod 2035 move towards the plastic part 014 and are respectively inserted into the first positioning hole 0143 and the second positioning hole 0144 on the plastic part 014, and the trumpet mouth at the entrance of the first positioning hole 0143 and the second positioning hole 0144 cooperates with the arc chamfer of the insertion end of the first positioning rod 2034 and the second positioning rod 2035, when the first positioning rod 2034 and the second positioning rod 2035 approach the first positioning hole 0143 and the second positioning hole 0144 under the action of the spring, the trumpet mouth and the arc chamfer play a guiding role, guiding the positioning rod to smoothly insert into the positioning hole, after the insertion is completed, the first positioning rod 2034 and the second positioning rod 2035 further fix the plastic part 014 from a specific position, enhancing the stability of the plastic part 014 in the accommodating groove 2031, ensuring that the plastic part 014 does not displace in the subsequent automatic assembly operation;

[0030] When the moving contact assembly 01 is finally needed to be taken out, the automation equipment acts on the opening disc 2036 again, pulls the first positioning rod 2034 and the second positioning rod 2035 to overcome the spring force, and moves away from the plastic part 014, so that the positioning rod is withdrawn from the first positioning hole 0143 and the second positioning hole 0144, and then the automation equipment grabs the moving contact assembly 01 and takes it out of the jig base 1, through the cooperation of the above settings, the precision requirement can be stably met, the product quality and production efficiency are effectively improved, and the efficient operation of the automatic production line is guaranteed.

[0031] Further, the fourth positioning part 204 comprises a first positioning hole 2041 and a second positioning hole 2042 which are adapted to the pin 015 and are opened on the jig base 1, and a notch 2043 is opened at the top of one end of the first positioning hole 2041; in operation, the automatic equipment pushes the pin 015 and aligns it with the first positioning hole 2041 and the second positioning hole 2042 on the jig base 1, and the pin 015 is accurately inserted into the first positioning hole 2041 and the second positioning hole 2042, so that the pin 015 is assembled in the movable contact assembly 01, the first positioning hole 2041 and the second positioning hole 2042 constrain the pin 015 from both ends at different positions, limit its translation and rotation in the plane, and ensure that the pin 015 is accurately assembled in the movable contact assembly 01 according to the predetermined position and angle, and the notch 2043 at the top of one end of the first positioning hole 2041 facilitates the removal of the movable contact assembly 01 after the assembly is completed.

[0032] Further, the slope 3 is opened on the jig base 1 at the assembly entrance edge of the first positioning part 201, the second positioning part 202, the third positioning part 203 and the fourth positioning part 204; in operation, when the automatic equipment moves each component of the movable contact assembly 01 to the corresponding positioning part for assembly, the slope 3 on the jig base 1 plays a guiding role, for example, when the movable contact 011 is moved close to the assembly entrance of the positioning groove 2011 under the operation of the automatic equipment, the inclined surface of the slope 3 first contacts the movable contact 011, and since the slope 3 has a specific inclination angle, a guiding force is generated on the movable contact 011, which guides it to gradually slide into the positioning groove 2011 along the inclined surface, and this guiding force can assist the automatic equipment to automatically correct the placement angle deviation of the movable contact 011 to a certain extent, so that the movable contact 011 is more easily and accurately placed in the predetermined position of the positioning groove 2011, and similarly, the slope 3 can play a guiding role in the process of assembling the iron assembly 013 to the second positioning part 202, the plastic part 014 to the third positioning part 203 and the pin 015 to the fourth positioning part 204, which improves the success rate of the assembly operation of the automatic equipment, effectively improves the automatic production efficiency of the enterprise, and enhances the market competitiveness of the enterprise.

[0033] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. An assembly fixture for a circuit breaker moving contact assembly, characterized in that: The utility model provides a kind of movable contact assembly positioning device, including jig base (1), the positioning station (2) for placing movable contact assembly (01) is provided on the jig base (1), the positioning station (2) includes the first positioning part (201) for positioning movable contact (011), the second positioning part (202) for positioning iron component (013), the third positioning part (203) for positioning plastic part (014) and the fourth positioning part (204) for positioning pin (015).

2. The assembly fixture for a circuit breaker moving contact assembly of claim 1, wherein: The first positioning part (201) includes a positioning groove (2011) opened on the jig base (1), and the inner bottom end of the positioning groove (2011) is provided with a positioning protrusion (2012) matched with the first end bending part (0111) of the movable contact (011).

3. The assembly fixture for a circuit breaker moving contact assembly of claim 1, wherein: The second positioning part (202) includes a concave positioning block (2021), the inner concave structure of the concave positioning block (2021) is matched with the protruding part (0131) on the iron component (013), and the second positioning part (202) further includes a magnet (2022) fitted on the inner concave structure of the concave positioning block (2021), and the top end of the magnet (2022) is flush with the inner concave structure of the concave positioning block (2021).

4. The circuit breaker moving contact assembly assembly jig of claim 3, wherein: A positioning groove (20211) matched with the last end bending part (0112) of the movable contact (011) is opened on the side arm of the concave positioning block (2021) close to the movable contact (011).

5. The assembly fixture for a movable contact assembly of a circuit breaker of claim 1, wherein: The third positioning part (203) includes a containing groove (2031) opened on the jig base (1) and matched with the plastic part (014), the side wall of the containing groove (2031) is a slope (2032) matched with the inclined surface (0141) on the plastic part (014), and a supporting groove (2033) for supporting the plastic part (014) is opened on one side of the inner wall of the containing groove (2031), the supporting groove (2033) acts on the convex column (0142) on the plastic part (014), and the L-shaped bending part (0145) on the plastic part (014) abuts against the top end of the side arm of the concave positioning block (2021).

6. The assembly fixture for a circuit breaker moving contact assembly of claim 1, wherein: The third positioning part (203) further includes a first positioning rod (2034) and a second positioning rod (2035) slidingly arranged on the jig base (1), which are respectively matched with the first positioning hole (0143) and the second positioning hole (0144) on the plastic part (014), the first positioning rod (2034) and the second positioning rod (2035) are inserted into the first positioning hole (0143) and the second positioning hole (0144) by the spring force arranged on the jig base (1), and the other end of the first positioning rod (2034) and the second positioning rod (2035) is fitted with an opening disc (2036).

7. The assembly fixture for a movable contact assembly of a circuit breaker of claim 6, wherein: The entrances of the first positioning hole (0143) and the second positioning hole (0144) are both opened with a trumpet mouth, and the insertion end of the first positioning rod (2034) and the second positioning rod (2035) is opened with an arc chamfer matched with the trumpet mouth.

8. The assembly fixture for a movable contact assembly of a circuit breaker of claim 1, wherein: The fourth positioning part (204) comprises a first positioning hole (2041) and a second positioning hole (2042) which are adapted to the pin (015) and are arranged on the jig base (1), and a notch (2043) is arranged at the top of one end of the first positioning hole (2041).

9. The assembly fixture for a movable contact assembly of a circuit breaker of claim 1, wherein: The jig base (1) is provided with a bevel (3) at the edge of the assembly entrance of the first positioning part (201), the second positioning part (202), the third positioning part (203) and the fourth positioning part (204).

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