CN116798821A

CN116798821A - Conductor clamping device

Info

Publication number: CN116798821A
Application number: CN202210259121.2A
Authority: CN
Inventors: 李凌飞; 吴昊; 沈维佳; 农振奖; 吴越; 刘亚南; 徐永富; 韦尚靖; 李小双; 周乐乐; 吴迪; 施黎明; 郭福安; 宫达
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2023-09-22

Abstract

The invention relates to the field of low-voltage appliances, in particular to a conductor clamping device, which comprises a bracket and at least one group of contact groups arranged on the bracket, wherein each group of contact groups comprises two contacts, each contact comprises a contact bridge, two ends of the contact bridge are respectively provided with a contact part, the contact bridges of the two contacts are oppositely arranged to form a clamping part for clamping a conductor between the contact parts of the two contacts, at least one contact in the contact groups also comprises an elastic part which is integrated with the contact bridge, and the bracket is abutted with the elastic part to enable the contact groups to clamp the conductor inserted into the clamping part; the conductor clamping device is simple in structure and reliable in action, and assembly errors can be reduced to the greatest extent.

Description

Conductor clamping device

Technical Field

The invention relates to the field of piezoelectric devices, in particular to a conductor clamping device.

Background

The circuit breaker is one of important electrical components in the field of piezoelectric devices and is used for switching on and off current; when overcurrent or short-circuit fault occurs in the circuit, the circuit breaker automatically cuts off the circuit so as to realize the protection of the power supply circuit, the motor and other circuits or equipment.

One of the connection modes of the circuit breaker is that two ends of a bridge contact are respectively connected with a main body busbar and an external busbar of the circuit breaker to realize the electric connection between the circuit breaker and an external circuit; the existing bridge-shaped contact generally needs to be assembled together by combining spring pieces, tension springs or compression springs and other elastic parts, so that the clamping force of the bridge-shaped contact to the inner/outer busbar is realized, the parts are more, the installation is complicated, and the assembly error is large.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a conductor clamping device which has the advantages of simple structure, reliable action and small assembly error.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a conductor clamping device, its includes support and installs at least one set of contact group on the support, and every contact group includes two contacts, the contact includes touching the bridge, respectively sets up a contact portion at touching bridge both ends, and the contact bridge of two contacts sets up relatively and makes the clamping part that is used for pressing from both sides tight conductor between the contact portion of two contacts, at least one contact in the contact group still includes the elastic part that is in an organic whole structure with touching the bridge, support and elastic part butt for make the conductor that contact group pressed from both sides tight and insert its clamping part.

Preferably, the contact bridge is rotatably arranged on the bracket through a rotating shaft structure, and the two contact bridges can be mutually close to or far away from each other.

Preferably, the elastic part is an elastic piece, two ends of the elastic piece are respectively connected with two ends of the contact bridge, and the elastic piece and the contact bridge enclose to form an avoidance gap.

Preferably, the support comprises a support plate and a support connecting arm, the two groups of support plates are arranged at intervals relatively, two ends of the two groups of support plates are connected through the support connecting arm respectively, the support connecting arm is in butt joint with the elastic sheet, the contact group is located between the two groups of support plates, and the two groups of support connecting arms are located on two sides of two contacts of the contact group respectively and are in limit fit with the two contacts respectively.

Preferably, in each contact group, two contacts are symmetrical to each other.

Preferably, the rotating shaft structure comprises a support pillow block arranged on a support and a positioning part arranged on a contact bridge, the positioning part is provided with positioning part grooves, and the two positioning part grooves are respectively matched with the support pillow block at two radial sides of the support pillow block;

or, the rotating shaft structure comprises a public shaft arranged on the support and a positioning part arranged on the contact bridge, the positioning part is provided with positioning part grooves, and the two positioning part grooves are positioned on two radial sides of the public shaft and are respectively matched with the public shaft.

Preferably, the rotating shaft structure comprises a single shaft arranged on the bracket, and each contact is respectively arranged on the bracket through corresponding single shaft rotation; the contact bridge of the contact is provided with a waist-shaped hole or a groove matched with the single shaft.

Preferably, the support further comprises a blocking portion for limiting the depth of insertion of the conductor, the blocking portion being located between two contacts of the contact set.

Preferably, the contact bridge comprises a long arm and a short arm which are positioned at two sides of the rotation center of the contact bridge and are connected with each other, and the free ends of the long arm and the short arm are respectively provided with a contact part; the blocking part is positioned between the contact part and the positioning part of the long arm and used for limiting the positioning part.

Preferably, the conductor clamping device comprises a plurality of contact groups, each contact group being stacked along the direction of the rotational axis of the contact.

According to the conductor clamping device, the contact bridge and the elastic part of the contact are of an integrated structure, so that the number of parts of the conductor clamping device is reduced, the structure of the conductor clamping device is simplified, compared with the elastic parts and the contact bridge which are arranged separately in the prior art, the assembly error is particularly reduced, the stability and the reliability of the conductor clamping device are effectively improved, and the consistency of the clamping force of the conductor clamping device is ensured.

In addition, the blocking part is in limit fit with the external busbar so as to prevent the situation that the clamping force is insufficient due to incorrect clamping positions of the contact group caused by the fact that the position of the external busbar inserted between two contacts is too deep and props against the positioning part; the blocking part is in limit fit with the positioning part to prevent the contact from falling out of the bracket.

Drawings

Fig. 1 is a schematic view of a conductor clamping device in accordance with a first embodiment of the invention;

fig. 2 is a schematic exploded view of a conductor clamping device according to a first embodiment of the invention;

fig. 3 is a schematic diagram of a plugging and matching structure of the conductor clamping device according to the first embodiment of the present invention with the main bus bar and the external bus bar of the circuit breaker respectively;

fig. 4 is a schematic cross-sectional view of a first embodiment of the conductor clamping device of the present invention mated with a circuit breaker body busbar and an external busbar, respectively;

fig. 5 is a schematic view of a conductor clamping device in accordance with a second embodiment of the invention;

fig. 6 is a schematic view of a third embodiment of a conductor clamping device of the present invention;

fig. 7 is a schematic view of a conductor clamping device in accordance with a fourth embodiment of the invention.

Detailed Description

Embodiments of the conductor clamping device of the present invention are further described below with reference to the examples given in connection with fig. 1-7. The conductor clamping device of the present invention is not limited to the description of the following embodiments.

The invention relates to a conductor clamping device, which comprises a bracket 1 and at least one group of contact groups, wherein each group of contact groups comprises two contacts 2 which are oppositely matched, each contact 2 comprises a contact bridge 2-0, two ends of each contact bridge 2-0 are respectively provided with a contact part 2-1, and the contact bridges 2-0 of the two contacts 2 are oppositely arranged to form clamping parts for clamping conductors between the contact parts 2-1 of the two contacts 2; in each contact group, at least one contact 2 further comprises an elastic part 2-3 arranged on the contact bridge 2-0 and integrally structured with the contact bridge 2-0, the support 1 is abutted with the elastic part 2-3, and the contact parts 2-1 of the two contact bridges 2-0 are driven to approach each other, so that the contact group clamps the conductor inserted into the clamping part thereof.

According to the conductor clamping device, the contact bridge 2-0 and the elastic part 2-3 of the contact 2 are of an integrated structure, so that the number of parts of the conductor clamping device is reduced, the structure of the conductor clamping device is simplified, and compared with the elastic parts and the contact bridge which are arranged separately in the prior art, the assembly error is particularly reduced, the stability and the reliability of the conductor clamping device are effectively improved, and the consistency of the clamping force of the conductor clamping device is ensured.

As shown in fig. 1-4, a first embodiment of the conductor clamping device of the present invention is used in a circuit breaker to connect a circuit breaker body busbar with an external busbar (preferably a busbar connecting the circuit breaker with an external circuit). Obviously, it can also be used in other switching devices, by connecting two conductors by plugging, said conductors not being limited to a busbar. As shown in fig. 1-4, the conductor clamping device of the invention comprises a bracket 1 and a group of contact groups, wherein the contact groups comprise two contacts 2 which are matched relatively, a contact bridge 2-0 of the contact 2 is arranged on the bracket 1 in a rotating way through a rotating shaft structure, and the two contact bridges 2-0 can be mutually close to or far from each other; the contact bridge 2-0 of the two contacts 2 is oppositely arranged between two ends of the contact bridge 2-0 to form two clamping parts for clamping conductors, the contact bridge 2-0 is provided with an elastic part 2-3 integrally formed with the contact bridge 2-0, the elastic part 2-3 is abutted to the support 1, and deformation of the elastic part 2-3 applies acting force to the contact bridge 2-0 to enable the two contact bridges 2-0 to be close to each other so as to enable the contact group to clamp the conductors inserted into the clamping parts. When the clamping parts at one ends of the two contacts 2 are inserted into conductors, the contacts 2 rotate through a rotating shaft structure; when both ends of the two contacts 2 are inserted into conductors, the two contacts 2 overcome the acting force of the elastic parts 2-3 and are far away from each other, and after the conductors are pulled out, the elastic parts 2-3 drive the two contacts 2 to approach each other.

As shown in fig. 2 and 4, the contact 2 includes a contact bridge 2-0, and two ends of the contact bridge 2-0 are respectively provided with a contact portion 2-1; in the contact group, at least one contact 2 further comprises an elastic part 2-3 which is arranged on the contact bridge 2-0 and is of an integral structure with the contact bridge, and the support 1 is abutted with the elastic part 2-3, so that the contact group clamps a busbar inserted between the contacts 2.

As shown in fig. 2 and 4, the elastic portion 2-3 is a spring, two ends of the spring are respectively connected with two ends of the contact bridge 2-0, the spring and the contact bridge 2-0 enclose to form an avoidance gap 2-4, a space is provided for elastic deformation of the spring, and the middle of the spring is abutted against the support 1.

Preferably, as shown in fig. 2 and 4, in the same contact 2, the spring plate and the contact portion 2-1 are respectively located at two sides of the contact bridge 2-0.

Preferably, as shown in fig. 4, the shape of the avoiding gap 2-4 is from the middle part of the elastic sheet to two ends of the elastic sheet, and the width of the avoiding gap is gradually reduced.

As other embodiments, the elastic portion 2-3 includes two elastic pieces respectively disposed at two ends of the contact bridge 2-0, and the two elastic pieces are symmetrically disposed and respectively abut against the support 1.

The specific structural form and the setting position of the elastic sheet can be adjusted according to actual needs.

As shown in fig. 1, 3 and 4, the bracket 1 comprises bracket plates 1-0 and bracket connecting arms 1-1, the two groups of bracket plates 1-0 are oppositely arranged at intervals, two ends of the two groups of bracket plates 1-0 are respectively connected with each other through the bracket connecting arms 1-1, two ends of each bracket connecting arm 1-1 are respectively connected with the two groups of bracket plates 1-0, the bracket connecting arms 1-1 are abutted with the elastic piece, the contact group is positioned between the two groups of bracket plates 1-0, the two groups of bracket connecting arms 1-1 are respectively positioned at two sides of two contacts 2 of the contact group and are respectively in limit fit with the two contacts 2, and the two groups of bracket connecting arms 1-1 act on the middle part of the elastic piece.

As shown in fig. 2 and 4, in the contact group, two contacts 2 are symmetrical to each other, and contact bridges 2-0 of the two contacts 2 are provided with integrally formed elastic portions 2-3. Further, the two bracket connecting arms 1-1 of the bracket 1 are respectively abutted against the elastic parts 2-3 (i.e., the spring pieces) of the two contacts 2.

As a further embodiment, only one contact 2 of the contact group is provided with a spring 2-3.

As shown in fig. 3-4, in the contact group, one end of each of the two contacts 2 is a first contact end, the other end is a second contact end, when a busbar is inserted between the first ends of the two contacts, the contacts 2 rotate around the rotation axis (that is, rotate through the rotation shaft structure), and when a busbar is also inserted between the second ends of the two contacts, the busbar presses the two contacts 2 to move to two sides, and simultaneously the two contacts 2 rotate around the respective first contact ends, and the elastic part 2-3 is abutted with the bracket connecting arm 1-1 of the bracket 1, so that the elastic part 2-3 is elastically deformed, and the contact part 2-1 of the two contacts 2 is clamped and inserted into the busbar between the two contacts.

As shown in fig. 2 and 4, the rotating shaft structure includes a support pillow block 1-2 disposed on the support 1 and a positioning portion 2-2 disposed on the contact bridge 2-0, the positioning portion 2-2 is provided with positioning portion grooves, and the two positioning portion grooves are located on two radial sides of the support pillow block 1-2 and are respectively matched with the support pillow block. Further, in the contact group, the positioning portions 2-2 of the two contacts 2 are protrusions which are oppositely arranged.

As shown in fig. 1-3, two support plates 1-0 of the support 1 are respectively provided with a support pillow block 1-2, the two support pillow blocks 1-2 are coaxially and oppositely arranged, and the support plates 1-0 and the support pillow blocks 1-2 are preferably in an integrated structure; when the busbar is not inserted into the contact group, the inner walls of the positioning part grooves of the two positioning parts 2-2 are respectively propped against the support pillow block 1-2, and after the two ends of the contact group are inserted into the busbar, the inner walls of the positioning grooves are separated from the support pillow block 1-2.

As shown in fig. 1-4, the holder 1 further comprises a blocking portion 1-3 for limiting the depth of insertion of the conductor, the blocking portion 1-3 being located between two contacts 2 of the contact set. Preferably, the blocking plate 1-3 is also positioned between one end of the two contacts 2 matched with the external busbar 4 and the positioning part 2-2, and the blocking part 1-3 is respectively in limit fit with the external busbar 4 and the positioning part 2-2; the blocking part 1-3 is in limit fit with the external busbar 4 so as to prevent the situation that the clamping force is insufficient due to incorrect clamping position of the contact group caused by the fact that the position of the external busbar inserted between the two contacts 2 is too deep and props against the positioning part 2-2; the blocking part 1-3 is in limit fit with the positioning part 2-2 to prevent the contact 2 from falling out of the bracket 1 (for example, the external busbar 4 drives the contact 2 to fall out of the bracket 1 when being pulled out).

As shown in fig. 2 and 4, the contact 2 includes a long arm and a short arm which are located at both sides of the rotation center and are connected to each other, and free ends of the long arm and the short arm are provided with contact portions 2-1; in each contact group, long arms of two contact bridges 2-0 clamp an external busbar 4, and short arms of two contact bridges 2-0 clamp a breaker body busbar 3; the blocking part 1-3 is positioned between the contact part 2-1 and the positioning part 2-2 of the long arm and is used for limiting the positioning part 2-2 and preventing the contact 2 from falling out of the bracket 1.

As shown in fig. 1-4, one embodiment of the stent 1: the support 1 comprises support plates 1-0 and support connecting arms 1-1, the two support plates 1-0 are oppositely arranged at intervals, two ends of the support connecting arms 1-1 are respectively connected with the two support plates 1-0, two ends of the two support plates 1-0 are respectively connected through one support arm 1-1, each support plate 1-0 is provided with a support pillow block 1-2, the two support pillow blocks 1-2 are coaxially and oppositely arranged and are located between the two support plates 1-0, one support plate 1-0 is provided with a blocking part 1-3, and the support pillow blocks 1-2 and the blocking part 1-3 are both located between the two support connecting arms 1-1. Further, the bracket 1 is of an integral structure.

As shown in fig. 2 and 4, is an embodiment of the contact 2: the contact 2 comprises a contact bridge 2-0, a contact part 2-1, a positioning part 2-2 and an elastic part 2-3, wherein the contact part 2-1, the positioning part 2-2 and the elastic part 2-3 are arranged on the contact bridge 2-0, two ends of the contact bridge 2-0 are respectively provided with one contact part 2-1, the elastic part 2-3 is an elastic piece, two ends of the elastic piece are respectively connected with two ends of the contact bridge 2-0, the elastic piece and the contact bridge 2-0 are enclosed to form an avoidance gap 2-4, the positioning part 2-2 and the contact part 2-1 are positioned on the same side of the contact bridge 2-0, the positioning part 2-2 is positioned between the two contact parts 2-1, and the positioning part 2-2 is provided with a positioning part groove.

The contact 2 is made of an elastic alloy material. The elastic alloy material is Fe-Ni-Cr alloy, ni-Ct alloy, ni-Cr-Nb alloy, ni-Co-Cr alloy, nb-Ti alloy or Fe-Ni-Co alloy.

As other examples, the elastic alloy material is a copper-based alloy such as tin phosphor bronze, beryllium bronze, or the like.

The contact 2 is non-magnetic, high in micro plastic deformation resistance, high in hardness, low in resistivity, low in elastic modulus temperature coefficient and low in internal consumption.

As shown in fig. 5, a second embodiment of the conductor clamping device of the present invention is shown.

The second embodiment differs from the first embodiment in that: the rotating shaft structure comprises a common shaft 6 arranged on the support 1 and a positioning part 2-2 arranged on the contact bridge 2-0, wherein the positioning part 2-2 is provided with positioning part grooves, and the two positioning part grooves are positioned on two radial sides of the common shaft 6 and are respectively matched with the common shaft 6. Further, the bracket plate 1-0 of the bracket 1 is provided with a first bracket hole 1-4 into which the common shaft 6 is inserted.

A third embodiment of the conductor clamping device of the present invention is shown in fig. 6.

The third embodiment differs from the first embodiment in that: the rotating shaft structure comprises a single shaft 7 arranged on the support 1, and each contact 2 is arranged on the support 1 in a rotating mode through the corresponding single shaft 7. Further, a support plate 1-0 of the support 1 is provided with a second support hole 1-5 for inserting a single shaft 7; the contact bridge 2-0 of the contact 2 is provided with a waist-shaped hole or groove which is matched with the single shaft 7.

When the contact bridge 2-0 is provided with a waist-shaped hole matched with the single shaft 7, the contact 2 is not provided with a positioning part 2-2.

A fourth embodiment of the conductor clamping device of the present invention is shown in fig. 7.

The fourth embodiment may be modified from the conductor clamping devices of the first to third embodiments, which comprise a plurality of contact groups, each of which is stacked in the direction of the rotational axis of the contact 2.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. The utility model provides a conductor clamping device, its includes support (1) and installs at least one set of contact group on support (1), and every contact group includes two contacts (2), contact (2) are including touching bridge (2-0), set up a contact portion (2-1) respectively at touching bridge (2-0) both ends, the contact bridge (2-0) of two contacts (2) set up relatively and make the clamping part that is used for pressing from both sides tight conductor between contact portion (2-1) of two contacts (2), its characterized in that: at least one contact (2) in the contact group further comprises an elastic part (2-3) which is integrated with the contact bridge (2-0), and the support (1) is abutted with the elastic part (2-3) and used for enabling the contact group to clamp a conductor inserted into the clamping part of the contact group.

2. The conductor clamping apparatus of claim 1 wherein: the contact bridge (2-0) is rotatably arranged on the support (1) through a rotating shaft structure, and the two contact bridges (2-0) can be mutually close to or far away from each other.

3. The conductor clamping apparatus of claim 1 wherein: the elastic part (2-3) is an elastic piece, two ends of the elastic piece are respectively connected with two ends of the contact bridge (2-0), and the elastic piece and the contact bridge (2-0) are enclosed to form an avoidance gap (2-4).

4. A conductor clamping apparatus according to claim 3, wherein: the support (1) comprises support plates (1-0) and support connecting arms (1-1), two groups of support plates (1-0) are arranged at opposite intervals, two ends of the two groups of support plates (1-0) are respectively connected through the support connecting arms (1-1), the support connecting arms (1-1) are in butt joint with the elastic pieces, the contact groups are located between the two groups of support plates (1-0), and the two groups of support connecting arms (1-1) are respectively located on two sides of two contacts (2) of the contact groups and are respectively in limit fit with the two contacts (2).

5. The conductor clamping apparatus of claim 1 wherein: in each contact group, two contacts (2) are of symmetrical structure.

6. The conductor clamping apparatus of claim 2 wherein:

the rotating shaft structure comprises a support pillow block (1-2) arranged on a support (1) and a positioning part (2-2) arranged on a contact bridge (2-0), wherein the positioning part (2-2) is provided with positioning part grooves, and the two positioning part grooves are respectively matched with the support pillow block (1-2) at two radial sides of the support pillow block;

or, the rotating shaft structure comprises a public shaft (6) arranged on the support (1) and positioning parts (2-2) arranged on the contact bridge (2-0), wherein the positioning parts (2-2) are provided with positioning part grooves, and the two positioning part grooves are positioned on two radial sides of the public shaft (6) and are respectively matched with the public shaft (6).

7. The conductor clamping apparatus of claim 2 wherein: the rotating shaft structure comprises a single shaft (7) arranged on the bracket (1), and each contact (2) is respectively arranged on the bracket (1) through the corresponding single shaft (7) in a rotating way; the contact bridge (2-0) of the contact (2) is provided with a waist-shaped hole or groove matched with the single shaft (7).

8. The conductor clamping apparatus of claim 1 wherein: the support (1) further comprises a blocking part (1-3) for limiting the depth of insertion of the conductor, the blocking part (1-3) being located between two contacts (2) of the contact set.

9. The conductor clamping device of claim 8, wherein: the contact bridge (2-0) comprises a long arm and a short arm which are positioned at two sides of the rotation center of the contact bridge and are connected with each other, and the free ends of the long arm and the short arm are respectively provided with a contact part (2-1); the blocking part (1-3) is positioned between the contact part (2-1) and the positioning part (2-2) of the long arm and used for limiting the positioning part (2-2).

10. The conductor clamping apparatus of claim 1 wherein: the conductor clamping device comprises a plurality of contact groups, and each contact group is overlapped along the rotation axis direction of the contact (2).