CN214152826U

CN214152826U - Bridge type electric connector for circuit breaker

Info

Publication number: CN214152826U
Application number: CN202120068635.0U
Authority: CN
Inventors: 何亚伟; 崔贇杰; 吴建宾
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-09-07
Anticipated expiration: 2031-01-12

Abstract

The invention provides a bridge-type electric connection device for a circuit breaker, which comprises a pair of contact sheet groups and an installation support, wherein the contact sheet groups are symmetrically arranged up and down, each contact sheet group comprises at least one contact sheet, and the contact sheets are provided with limiting holes and are connected in series to form the contact sheet groups through fixing shafts. The left end and the right end of each contact piece are provided with sliding grooves and are movably connected with elastic pieces, and a connecting bridge is connected between the elastic pieces of the two contact piece groups. The mounting bracket is matched with the fixed shaft and fixes the contact sheet groups which are symmetrically arranged up and down. The two contact plate groups are oppositely arranged, each contact plate group is provided with the elastic piece, the elastic pieces are connected by the connecting bridges, and the elastic pieces can be bent and deformed in the direction in which the contact plate groups are oppositely arranged by utilizing the movable matching relation between the elastic pieces and the contact plate groups, so that the gaps between the contact plate groups can be adjusted to adapt to the connection of the bus bars with smaller thickness errors.

Description

Bridge type electric connector for circuit breaker

Technical Field

The invention relates to the technical field of low-voltage electric appliances, in particular to a bridge type electric connection device applied to a circuit breaker.

Background

The bridge type electric connection device (bridge type contact) of the universal circuit breaker is an important component for connecting a main bar of a circuit breaker body and a main bar of a drawer seat, and the conventional device comprises a supporting piece, a plurality of contact pieces, a plurality of elastic devices and a plurality of shafts.

Bridge type electric connection devices using an elastic sheet structure in the current market are mainly divided into the following two types: one is that the shell fragment adopts the external installation type design, there are strutting pieces between the contact pieces, such as a frame breaker bridge type contact disclosed in patent No. CN 201320881630.5; an electrical connection bridge type contact for a drawer type circuit breaker is disclosed in patent No. CN200820087448.1, in which a spring plate is designed to be built-in and a baffle is arranged in the middle of a contact piece, which is not beneficial to heat dissipation.

Chinese patent CN105762040B discloses a bridge contact of frame circuit breaker, which adopts a spring built-in structure, contact sheet sets symmetrically arranged up and down, a mounting bracket for fixedly mounting the contact sheet sets, an outer end face connected between the contact sheet sets arranged up and down, an elastic device fixed by the mounting bracket and connected between the contact sheet sets, an upper end and a lower end of the elastic device are respectively abutted on the contact sheet sets symmetrically arranged up and down in the connecting direction of the contact sheet sets. Referring to fig. 1, in practical use, the thickness of the dynamic bus bar and the static bus bar has a certain deviation, and the gap between the upper contact set and the lower contact set in the patent is relatively fixed, so that the dynamic bus bar and the static bus bar are very difficult to insert, even cannot be inserted, unless the thickness of the dynamic bus bar and the static bus bar is strictly controlled, but have high requirements on materials and post-treatment processes, or cause cost increase.

Based on this, the present application is proposed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a bridge-type electric connection device for a circuit breaker, which solves the problem of a bridge-type contact in the prior art.

In order to achieve the above purpose, the bridge type electric connection device for the circuit breaker of the invention has the following structure: comprises that

The contact sheet group comprises at least one contact sheet, and the contact sheet is provided with a limiting hole and is connected in series to form the contact sheet group through a fixing shaft; the left end and the right end of the contact piece are provided with sliding grooves;

the two ends of the elastic piece are respectively inserted into the sliding grooves at the left end and the right end of the contact piece group;

the connecting bridge is positioned between the elastic pieces of the two contact piece groups and is fixedly connected with the middle parts of the elastic pieces;

the mounting bracket is arranged on the end surface of the contact sheet group or the vicinity thereof, is provided with a fixing hole corresponding to the fixing shaft, and the end part of the fixing shaft penetrates through the fixing hole;

the length of the limiting hole or the fixing hole along the up-down direction is larger than the length of the limiting hole or the fixing hole along the left-right direction, so that the fixing shaft can move in the up-down direction relative to the limiting hole or the fixing hole.

In the technical scheme, the two ends of the elastic piece are movably inserted into the contact piece groups, and the elastic piece has elasticity, so that when the gap between the two contact piece groups is increased, the two contact piece groups move back to back, and the two ends of the elastic piece passively move outwards in the process, namely the two ends of the elastic piece move slightly to exit from the sliding groove. Therefore, when a busbar with a thickness slightly larger than the gap is inserted into the gap between the contact sheet groups which are symmetrically arranged up and down, the adaptive adjustment of the relative gap between the contact sheet groups is realized by utilizing the displacement in the up and down direction generated by the bending deformation of the elastic piece through the matching relationship between the contact sheet groups and the two ends of the elastic piece.

In the prior art, since the elastic device is deformed by being stretched, for an object with ductility, especially the arc-shaped elastic sheet structure shown in the embodiment of the prior patent, the stretching force required for stretching deformation is much larger than the acting force generated by bending deformation of the elastic member in the present invention.

Therefore, compared with the technical scheme of the elastic device stretched in the connecting direction of the contact piece group adopted in the prior art, the elastic device overcomes the application defect that the stretching force required by the elastic device when the elastic device deforms in the stretching direction is larger than the pulling force which can be generated by the structure of the device when the actual bus bar is inserted, fully considers the actual application situation, and is simple in structure and suitable for practical use.

The invention further provides the following: the mounting bracket and the connecting bridge are detachably and fixedly connected, the mounting bracket and the connecting bridge are connected, the mounting bracket and the contact piece group, the connecting bridge and other structures can be ensured to form a whole so as to be convenient to use, and meanwhile, the mounting bracket and the contact piece group are kept in a relatively fixed state so as to be convenient for the installation of the fixed shaft.

The structure is simple, and the assembly is convenient.

The invention further provides the following: the elastic piece consists of a plurality of elastic sheets which are parallel to each other and are connected into a whole in the middle; the elastic pieces are integrated, so that the rapid assembly is facilitated, and the design of the elastic pieces is also beneficial to reducing the contact area between the elastic piece and the contact piece group, increasing the clearance between the contact piece group and the elastic piece and facilitating the heat dissipation.

The invention further provides the following: the left end and the right end of each elastic piece are inserted into the sliding grooves formed in the contact pieces or positioned between the sliding grooves on the adjacent contact pieces. Through the grafting cooperation between flexure strip and the spout, realize the relative activity of flexure strip and spout, establish the basis for the change of the relative clearance between the contact patch group.

In order to simplify the structural design, preferably, a strip-shaped or waist-shaped limiting hole is formed in the middle of the contact piece.

Preferably, the number of the limiting holes in the shape of a strip or a kidney circle is one. Or further, the arc shape of the elastic piece protrudes to the side where the connecting bridge is located.

The invention further provides the following: at least one protrusion is arranged on the end face of each contact piece, and the protrusions are used for enabling adjacent contact pieces to be arranged at intervals when more than two contact pieces are stacked to form a contact piece group.

The invention further provides the following: the mounting bracket further includes extensions extending leftward and/or rightward from both ends of the mounting portion where the fixing hole is located.

The invention further provides the following: the contact piece comprises a body and end parts, wherein the left end and the right end of the body incline to one side of the body, and the sliding groove is a crack between the end parts and the body.

The invention further provides the following: the sliding groove is arranged on one side opposite to the upper contact piece group and the lower contact piece group, so that the elastic piece is convenient to mount, and the bending deformation change of the elastic piece is adapted; in addition, the structure design is compact, and the overall volume is favorably reduced.

The invention has the following beneficial effects: the two contact plate groups are oppositely arranged, each contact plate group is provided with the elastic piece, the elastic pieces are connected by the connecting bridges, and the elastic pieces can be bent and deformed in the direction in which the contact plate groups are oppositely arranged by utilizing the movable matching relation between the elastic pieces and the contact plate groups, so that the gaps between the contact plate groups can be adjusted to adapt to the connection of the bus bars with smaller thickness errors.

Drawings

FIG. 1 is a general schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the embodiment of the present invention.

Fig. 3 is a schematic top view of fig. 2.

Fig. 4 is a schematic sectional view of fig. 3A.

Fig. 5 is a schematic sectional view of fig. 3B.

FIG. 6 is a schematic view of an elastic member according to an embodiment of the present invention.

Fig. 7 is a schematic view of a contact structure according to an embodiment of the invention.

Fig. 8 is a perspective view of a contact plate according to an embodiment of the present invention.

Reference numerals: 1, mounting a first support, 2, a first elastic part, 3, a first contact sheet group, 4, a second contact sheet group, 5, a fastening screw, 6, a connecting bridge, 7, a second elastic part, 8, a second fixed shaft, 9 and a first fixed shaft;

210-middle part, 220-connecting hole, 230-elastic piece, 300-contact piece body, 310-contact piece, 301-limiting hole, 302-bulge, 303-end part, 304-sliding groove, 305-internal convex part.

Detailed Description

The invention provides a bridge type electric connection device for a circuit breaker, which comprises a pair of contact piece 310 groups which are symmetrically arranged up and down, wherein a connection part formed by connecting a bridge 6 by an elastic part is arranged between the two contact piece 310 groups, and the elastic part and the contact piece 310 groups are movably inserted and matched to ensure that the relative gap between the two contact piece 310 groups is adjustable, thereby being convenient for the insertion and use of busbars (or named as busbars) with different thicknesses in practical application.

The present invention is further illustrated by the following specific examples.

It should be noted that, in the present invention, terms of the symmetrical arrangement of the upper and lower parts and the left and right directions appearing therein are used for convenience of describing the relative positional relationship of the parts in the present invention, and are not specifically directed to a specific direction.

Embodiment 1 as shown in fig. 2, this embodiment provides a bridge-type electrical connection device for a circuit breaker, which includes a first contact piece 310 group 3, a second contact piece 310 group 4, a first elastic piece 2, a second elastic piece 7, and a connection bridge 6, and as shown in fig. 3, the first contact piece 310 group 3 and the second contact piece 310 group 4 are arranged at a vertical symmetric interval, and the first contact piece 310 group is formed by stacking a plurality of contact pieces 310: the middle part of the contact piece 310 is provided with a waist-shaped limiting hole 301, and is connected in series to form a contact piece 310 group I3/contact piece 310 group II 4 through a first fixing shaft 9/a second fixing shaft 8, in order to prevent the adjacent contact pieces 310 from directly contacting to cause heat accumulation and incapability of heat dissipation, the end surfaces of the left end and the right end of the contact piece 310 are respectively provided with a round or hemispherical bulge 302, so that the adjacent contact pieces 310 are combined and kept at a certain interval to facilitate heat dissipation.

As mentioned above, the contact piece 310 includes a body and end portions 303 located at the left and right ends of the body and inclined to one side of the body, and a sliding groove 304 inclined in the same direction as the end portion 303 is formed at a gap between the end portions 303 and the body. Referring to fig. 6, each of the first and second

elastic members

2 and 7 has an arc-shaped structure, and each of the elastic members is composed of a plurality of elastic pieces 230 which are parallel to each other and integrally connected to each other at the middle (for convenience of description, the portion of the structure may be defined as a middle portion 210), wherein the left and right ends of the elastic pieces 230 are bent inward. As shown in fig. 2, the left end and the right end of each elastic piece 230 of the first elastic piece 2 and the second elastic piece 7 are inserted into the sliding slots 304 formed on the corresponding contact piece 310. The middle portion 210 is provided with connecting holes 220 arranged at intervals, the first elastic element 2 and the second elastic element 7 can be arranged back to the connecting bridge 6 (the bending direction of the first elastic element and the second elastic element deviates from the side where the connecting bridge 6 is located), and the first elastic element 2, the connecting bridge 6 and the second elastic element 7 can be detachably and fixedly connected into a small assembly through the connecting holes 220 and fastening bolts. Thus, when the first elastic element 2 and the second elastic element 7 are respectively connected to the sliding slots 304 of the first contact piece 310 group 3 and the second contact piece 310 group 4, the first contact piece 310 group 3 and the second contact piece 310 group 4 can be connected into a whole through small components.

In the structure described in the upper section, since the first elastic element 2, the second elastic element 7, the first contact piece 310 group 3 and the second contact piece 310 group 4 are movably engaged with the sliding slot 304 through the two ends of the elastic piece 230, the relative gap between the first contact piece 310 group 3 and the second contact piece 310 group 4 can be adjusted by the compression deformation generated between the first elastic element 2 and the second elastic element 7 in the bending direction in cooperation with the insertion depth of the first elastic element 2 and the second elastic element 7 in the sliding slot 304, so as to adapt to the use of busbars or busbars with different thicknesses.

In order to fix the first fixing shaft 9 and the second fixing shaft 8, a first mounting bracket 1 and a second mounting bracket are respectively detachably and fixedly mounted on two end faces on one side of outer end faces (i.e., an upper surface and a lower surface shown in fig. 1) of the first contact piece 310 group 3 and the second contact piece 310 group 4, and the first mounting bracket 1 and the second mounting bracket are respectively fixed on the connecting bridge 6 through fastening screws 55.

And installing support 1, installing support two include the installation department of two relative settings under and connect the connecting portion of two installation departments, are equipped with the fixed orifices that suits with fixed shaft hole footpath on the installation department: during assembly, two ends of the first fixing shaft 9 and two ends of the second fixing shaft 8 are respectively inserted into the fixing holes in the first mounting bracket 1 and the second mounting bracket. The diameter of the fixing hole is matched with the rod diameters of the end parts 303 of the first fixing shaft 9 and the second fixing shaft 8. The connecting part is used for connecting the two mounting parts into a whole so as to facilitate assembly.

Through the clearance fit between the upper waist-shaped limiting hole 301 and the first fixed shaft 9 or the second fixed shaft 8, the first contact piece 310 group 3 and the second contact piece 310 group 4 can move in a certain range respectively, so that the clearance adjustment in the upper section is realized.

In addition, the shape of the limiting hole 301 may be rectangular or strip-shaped, and the length direction of the limiting hole 301 only needs to be arranged along the vertically symmetrical direction of the first group 3 of the contact pads 310 and the second group 4 of the contact pads 310.

Example 2 this example differs from example 1 in that: in this embodiment, the contact sheet 310 is provided with 2 to 3 waist-shaped limiting holes 301, taking 2 waist-shaped limiting holes 301 as an example, the 2 waist-shaped limiting holes 301 are respectively disposed at the left end and the right end of the contact sheet 310 body 300, and a fixing shaft is respectively disposed in the 2 waist-shaped limiting holes 301 to connect the plurality of contact sheets 310 in series into a group of contact sheets 310. The rest of the structure is as described in example 1.

Embodiment 3 this embodiment differs from the above embodiments in that: in this embodiment, a fixing shaft adapted to the aperture of the limiting hole 301 penetrates through the limiting hole 301, the fixing hole on the mounting bracket is a oval hole or a rectangle or a strip, and the length direction of the limiting hole 301 is arranged along the vertical symmetry direction of the first group 3 of the contact pieces 310 and the second group 4 of the contact pieces 310.

Therefore, the first contact piece 310 group 3 and the second contact piece 310 group 4 can be matched with the oval hole or the rectangular or strip-shaped movable gap in the up-and-down direction through the fixed shaft on the contact piece 310 group 3 and the contact piece 310 group 4, so that the relative gap between the first contact piece 310 group 3 and the second contact piece 310 group 4 can be adjusted.

Embodiment 4 this embodiment differs from the above embodiments in that: in this embodiment, the limiting hole 301 is a fixing shaft penetrating therethrough and adapted to the aperture thereof, and the aperture of the fixing hole on the first mounting bracket 1 or the second mounting bracket is also adapted to the rod diameter of the end 303 of the fixing shaft. The first elastic piece 2 and/or the second elastic piece 7 are in threaded connection with the connecting bridge 6 through the fastening screws 5, and the relative distance between the first elastic piece 2 and/or the second elastic piece 7 and the connecting bridge 6 can be adjusted by adjusting the depth of the fastening screws 5 inserted into the connecting bridge 6, so that the relative gaps between the first contact piece 310 group 3 and the second contact piece 310 group 4 which are respectively matched and connected with the first elastic piece 2 and the second elastic piece 7 are adjusted.

Embodiment 5 this embodiment differs from the above embodiments in that: in this embodiment, the sliding groove 304 may be horizontally disposed in the left and right directions. With this structure, the resistance of the groove wall of the sliding groove 304 to the bending deformation of the elastic member is larger than that of the sliding groove 304 provided obliquely in the above embodiment, and therefore, it is considered to further increase the elasticity or flexibility of the elastic member to make up for the above disadvantage.

The specific application process of the embodiment is as follows: when the busbar (bus) is inserted, the first contact piece 310 group 3 and the second contact piece 310 group 4 are pushed away upwards and downwards respectively, the first elastic piece 2 and the second elastic piece 7 are bent and deformed simultaneously, two ends of the first elastic piece 2 and the second elastic piece 7 move outwards in the sliding groove 304, and a gap between the first contact piece 310 group 3 and the second contact piece 310 group 4 is passively adjusted to accommodate the insertion of the busbar (bus).

In summary, the invention provides a bus bar (bus bar) which can adapt to the thickness with certain error for connection, overcomes the defects that the elastic sheet 230 has large tensile deformation obstacle and is difficult to use practically in the prior art, meets the practical use requirement, and has the advantages of simple structure, reasonable design and easy implementation.

Claims

1. A bridge type electrical connection device for a circuit breaker, characterized in that: comprises that

the length of the limiting hole or the fixing hole in the up-down direction is greater than the length of the limiting hole or the fixing hole in the left-right direction.

2. The bridge-type electrical connection for circuit breakers of claim 1 wherein: the mounting bracket is detachably and fixedly connected with the connecting bridge.

3. The bridge-type electrical connection device for circuit breakers of claim 1 or 2, wherein: the elastic piece is arc-shaped.

4. The bridge-type electrical connection for circuit breakers of claim 3 wherein: the arc of the elastic piece is convex to one side of the connecting bridge.

5. The bridge-type electrical connection device for circuit breakers of any of claims 1, 2 and 4, wherein: the elastic piece is composed of a plurality of elastic pieces which are parallel to each other and are connected into a whole in the middle, and the left end and the right end of each elastic piece are inserted into the sliding grooves formed in the contact pieces or inserted between the sliding grooves formed in two adjacent contact pieces.

6. The bridge-type electrical connection for circuit breakers of claim 5 wherein: the strip-shaped or waist-round limiting hole is formed in the middle of the contact piece; and/or, on each contact piece, one limiting hole in a strip shape or a waist-round shape is arranged.

7. The bridge-type electrical connection device for circuit breakers of any of claims 1, 2, 4 and 6, wherein: at least one protrusion is arranged on the end face of each contact piece, and the protrusions are used for enabling adjacent contact pieces to be arranged at intervals when more than two contact pieces are stacked to form a contact piece group.

8. The bridge-type electrical connection device for circuit breakers of any of claims 1, 2, 4 and 6, wherein: the mounting bracket further includes extensions extending leftward and/or rightward from both ends of the mounting portion where the fixing hole is located.

9. The electrical bridge connection assembly for circuit breakers of claim 8 wherein: the contact piece comprises a body and end parts, wherein the left end and the right end of the body incline to one side of the body, and the sliding groove is a crack between the end parts and the body.

10. The bridge connection for circuit breakers of claim 1 wherein: the sliding groove is arranged on one side opposite to the upper contact piece set and the lower contact piece set.