CN210326199U

CN210326199U - Wire clamp for capacitor, wire outlet sleeve comprising same and capacitor

Info

Publication number: CN210326199U
Application number: CN201921396467.7U
Authority: CN
Inventors: 沈小益; 张会民; 姚鹏
Original assignee: Shanghai Cooper Electric Power Container Co ltd
Current assignee: Shanghai Cooper Electric Power Container Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-04-14
Anticipated expiration: 2029-08-26

Abstract

The utility model provides a wire clamp and including its play line sleeve pipe and condenser for condenser, the condenser includes binding post, the wire clamp includes: the connecting plate is provided with a through hole for the wiring terminal to pass through; and fix first joint portion on the connecting plate, first joint portion has injectd the accommodation space that is used for holding the wire, first joint portion has the confession the wire gets into accommodation space's opening, so that first joint portion with wire looks joint. The utility model discloses a fastener can and the binding post of condenser between form firm being connected, avoid damaging the condenser.

Description

Wire clamp for capacitor, wire outlet sleeve comprising same and capacitor

Technical Field

The utility model relates to a condenser field, concretely relates to a lead wire clamp for condenser reaches wire sleeve and condenser including it.

Background

The half clamp is a clamp for connecting two semi-annular objects into a circular ring. At present, a connecting terminal of a capacitor is connected with a copper stranded wire by a half wire clamp, and then the half wire clamp is fixed on the connecting terminal of the capacitor by a nut and a gasket. However, the copper strand contracts when energized. After a period of time, the half wire clamp and the copper stranded wire can be loosened, and further the looseness between the nut and the wiring terminal of the capacitor is caused.

In order to check whether the looseness exists between the half clamp and the copper stranded wire, the circuit needs to be disconnected after the capacitor is used for a period of time, and the torque of the nut on the wiring terminal of the capacitor, namely the tightness of the nut, needs to be checked. If the user forgets the power failure inspection, the resistance of the junction of the half clamp and the copper stranded wire will become large, and after the capacitor is used for a period of time, the wiring terminal of the capacitor can generate heat and leak oil, and even the capacitor is damaged.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that prior art exists, the utility model provides a fastener for condenser, the condenser includes binding post, the fastener includes:

the connecting plate is provided with a through hole for the wiring terminal to pass through; and

fix first joint portion on the connecting plate, first joint portion has injectd the accommodation space that is used for holding the wire, first joint portion has the confession the wire gets into accommodation space's opening, so that first joint portion with wire looks joint.

Preferably, the first clamping portion is used for pressing the wire after mechanical cold pressing.

Preferably, the first clamping portion is perpendicular to the cross section of the wire and is in a U shape, and the first clamping portion comprises a first clamping jaw and a second clamping jaw which are oppositely arranged.

Preferably, when the first clamping portion is not subjected to external force, the distance between the end of the first claw and the end of the second claw is smaller than the diameter of the wire.

Preferably, the first clamping portion defines a cylindrical accommodating space.

Preferably, the wire clamp is integrally formed, and the connecting plate is flat.

Preferably, the wire clamp comprises a second clamping portion which is the same as the first clamping portion, and the first clamping portion and the second clamping portion are fixedly arranged on two opposite sides of the connecting plate.

Preferably, an opening of the first clamping portion faces in an opposite direction to an opening of the second clamping portion.

Preferably, the central axis of the through hole of the connecting plate is perpendicular to the central axis of the accommodating space defined by the first clamping portion and the central axis of the accommodating space defined by the second clamping portion.

The utility model provides a wire outgoing sleeve, the wire outgoing sleeve includes: a wire clamp as described above; a flat washer; a spring washer; a nut; and the wiring terminal sequentially penetrates through the through hole of the wire clamp, the flat washer and the spring washer and then is detachably and fixedly connected with the nut.

The utility model provides a capacitor, capacitor includes:

a capacitor case;

the capacitor element group is positioned in the capacitor box body and comprises a first lead-out electrode and a second lead-out electrode; and

the two outgoing line sleeves are fixed on the capacitor box body, and connecting terminals of the two outgoing line sleeves are respectively connected to the first outgoing electrode and the second outgoing electrode.

The utility model discloses a fastener can and the binding post of condenser between form firm being connected, and be suitable for through mechanical cold pressing after compress tightly copper strands. The copper stranded wire is prevented from loosening with the wire clamp during electrification so as to damage the capacitor.

Drawings

Embodiments of the invention are further described below with reference to the accompanying drawings, in which:

fig. 1 is a perspective view of a capacitor outlet sleeve according to a preferred embodiment of the present invention.

Fig. 2 is an exploded view of the outlet sleeve shown in fig. 1.

Fig. 3 is an enlarged partial schematic view of the outlet sleeve shown in fig. 1, viewed in the direction of arrow a 1.

Fig. 4 is an exploded view corresponding to fig. 3.

Fig. 5 is an enlarged partial schematic view of the outlet sleeve of fig. 1 as viewed in the direction of arrow a 2.

Fig. 6 is an exploded view corresponding to fig. 5.

Fig. 7 is an enlarged schematic view of the wire clamp shown in fig. 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying drawings.

Fig. 1 is a perspective view of an outlet sleeve of a capacitor according to a preferred embodiment of the present invention, wherein fig. 1 does not show a capacitor element set and another outlet sleeve of the capacitor. As shown in fig. 1, the outlet bushing 2 includes a capacitor bushing 21 made of an insulating material; a terminal cap 26 made of a metal material, the terminal cap 26 being located outside the capacitor bushing 21 and fixed on one end of the capacitor bushing 21; a terminal 25 fixedly connected to the terminal cap 26, the terminal 25 being configured in the shape of a screw, the outer side wall of which has an external thread (not shown in fig. 1); and the wire clamp 1, the flat washer 22, the spring washer 23 and the nut 24 are arranged in this order in the axial direction of the terminal 25, wherein the internal thread (not shown in fig. 1) of the nut 24 is adapted to the external thread of the terminal 25.

Fig. 2 is an exploded view of the outlet sleeve shown in fig. 1. As shown in fig. 2, the wire clamp 1 is integrally formed of a metal material, and includes a connecting plate 11 and first and second catching portions 12 and (not shown in fig. 2) fixedly provided on opposite sides of the connecting plate 11. The first clamping portion 12 is used for clamping the copper stranded wire 31, and the second clamping portion is used for clamping the copper stranded wire 32. The connecting plate 11 is provided with a through hole 111, and the hole diameters of the through hole 111, the flat washer 22 and the central hole of the spring washer 23 are slightly larger than the diameter of the connecting terminal 25.

Fig. 3 is an enlarged partial schematic view of the outlet sleeve of fig. 1 as viewed in the direction of arrow a1, and fig. 4 is an exploded view corresponding to fig. 3. Wherein the copper strands 31 are shown in dashed lines in fig. 3 and 4. As shown in fig. 3 and 4, the terminal 25 is adapted to be detachably and fixedly coupled with the nut 24 after passing through the through hole 111 of the coupling plate 11, the flat washer 22, and the center hole of the spring washer 23 in this order. The nut 24 is screwed to the terminal 25 by a wrench, so that the connection plate 11, the flat washer 22 and the spring washer 23 are tightly pressed between the nut 24 and the terminal cap 26.

The first clamping portion 12 is used for clamping the copper stranded wire 31, and when the first clamping portion 12 clamps the copper stranded wire 31, the central axis L31 of the copper stranded wire 31 is perpendicular to the central axis L of the through hole 111 of the connecting plate 11.

Fig. 5 is an enlarged partial schematic view of the outlet sleeve of fig. 1 as viewed in the direction of arrow a2, and fig. 6 is an exploded view corresponding to fig. 5. The through-hole 111 of the connection plate 11 is shown in a dashed box in fig. 5 and 6. As shown in fig. 5 and 6, the first clamping portion 12 and the second clamping portion 12 'are fixedly disposed on opposite sides of the connecting plate 11, and the first clamping portion 12 and the second clamping portion 12' are U-shaped along a cross section perpendicular to the

copper strands

31 and 32. The first clamping portion 12 defines a cylindrical accommodating space 121, and the shape of the accommodating space 121 is matched with that of the copper stranded wire 31 and is used for accommodating the copper stranded wire 31. Likewise, the second clamping portion 12 ' defines a cylindrical accommodating space 121 ', and the shape of the accommodating space 121 ' is matched with that of the copper stranded wire 32 and is used for accommodating the copper stranded wire 32.

One side of the first clamping portion 12 is also provided with an opening 124 for the copper stranded wire 31 to enter the accommodating space 121,

the opening 124 of the first clip portion 12 is oriented in the opposite direction to the arrow a 1. Similarly, one side of the second clamping portion 12 'has an opening 124' for the copper strand 32 to enter the accommodating space 121 ', and the opening 124' of the second clamping portion 12 'is oriented in the direction opposite to the direction indicated by the arrow a 1'. Wherein arrow a1 is in the opposite direction to arrow a 1'.

The assembly process of the clip 1 of the outlet sleeve 2 of the present embodiment will now be described with reference to fig. 5 and 6: the copper stranded wire 31 is first placed at the opening 124 of the first clamping portion 12 and pressed, pushed or squeezed into the accommodating space 121 defined by the first clamping portion 12 along the direction indicated by the arrow a1, and the copper stranded wire 32 is placed at the opening 124 ' of the second clamping portion 12 ' and pressed, pushed or squeezed into the accommodating space 121 ' defined by the second clamping portion 12 ' along the direction indicated by the arrow a1 '. The first and second clamping portions 12, 12' are then pressed together with the

copper strands

31, 32, respectively, by mechanical cold pressing in a cold press. Finally, the connecting plate 11, the flat washer 22 and the spring washer 23 of the wire clamp 1 are sequentially sleeved on the connecting terminal 25, and then the nut 24 is screwed on the connecting terminal 25.

Fig. 7 is an enlarged schematic view of the wire clamp shown in fig. 6. As shown in fig. 7, the first engaging portion 12 and the second engaging portion 12' are symmetrically arranged, and only the first engaging portion 12 will be described as an example. The first clamping portion 12 includes a first claw 122 and a second claw 123 arranged oppositely, the first claw 122 and the second claw 123

The second jaw 123 is made of a metal material having a certain elasticity. In a natural state, i.e. without external forces, the distance d between the end 1221 of the first jaw 122 and the end 1231 of the second jaw 123 (i.e. in a direction parallel to the centre axis L of the through hole 111) is smaller than the diameter of the copper strand 31 (see fig. 6).

In the process that the copper stranded wire 31 enters the accommodating space 121, the outer side wall of the copper stranded wire 31 firstly contacts the end 1221 of the first jaw 122 and the end 1231 of the second jaw 123, and applies a force to the end 1221 and the end 1231 to make the ends move away from each other, so that the distance d between the end 1221 and the end 1231 is increased, the first opening 124 is increased, the copper stranded wire 31 is allowed to enter the accommodating space 121, and the first clamping portion 12 forms a strong clamping force to the copper stranded wire 31.

The utility model discloses a connecting plate 11 of fastener 1 is flat-plate-shaped, and it can with between plain washer 22 and the wiring cap 26 closely laminate be in the same place, can firmly fix it on wiring cap 26 through nut 24, spring washer 23 and plain washer 22, the not hard up condition can not appear.

The copper stranded

wires

31 and 32 are respectively fixed with the first clamping part 12 and the second clamping part 12' of the wire clamp 1 through cold pressing. When the

copper strands

31, 32 are conductive, no looseness will occur between the

copper strands

31, 32 and the first and second engaging portions 12, 12'. The user does not have to check after a certain time whether there is a loosening between the nut 24 of the outlet bushing 2 and the terminal 25.

The first clamping portion 12 and the second clamping portion 12' are U-shaped along the cross section perpendicular to the copper stranded wire, so that the copper stranded wire can be clamped conveniently.

The wire clamp 1 is integrally formed by metal materials (for example, formed by stamping a metal plate), has high mechanical strength, and does not generate additional contact resistance at the connecting part of the connecting plate 11 and the first clamping part 12 and the second clamping part 12'.

The first clamping portion 12 and the second clamping portion 12 'are arranged oppositely, and the orientation of the opening 124 of the first clamping portion 12 is opposite to that of the opening 124' of the second clamping portion 12 ', so that the cold pressing operation of the cold pressing machine on the first clamping portion 12 and the second clamping portion 12' is facilitated.

The central axis L of the through hole 111 of the connecting plate 11 is perpendicular to the central axis of the cylindrical receiving space 121 defined by the first engaging portion 12 and the central axis of the cylindrical receiving space 121 'defined by the second engaging portion 12'. In other words, when the first clamping portion 12 and the second clamping portion 12' clamp the copper stranded wire 31 and the copper stranded wire 32, respectively, the central axis L of the through hole 111 is perpendicular to the copper stranded wire 31 and the copper stranded wire 32, and other components on the outgoing line sleeve 2 do not obstruct the extending direction of the copper stranded

wires

31 and 32, so that the copper stranded wires are conveniently wired.

The first clamping portion 12 and the second clamping portion 12' of the wire clamp 1 can increase the current-carrying capacity of the wire outlet sleeve 2. In other embodiments of the present invention, the wire clamp has a clamping portion.

The utility model also provides a capacitor, which comprises a capacitor box body; the capacitor element group is positioned in the capacitor box body and is formed by connecting a plurality of capacitor elements in series and/or in parallel; and two outgoing line sleeves fixed on the capacitor box body.

Although the present invention has been described in connection with the preferred embodiments, it is not intended to limit the invention to the embodiments described herein, but rather, to include various changes and modifications without departing from the scope of the invention.

Claims

1. A clip for a capacitor, the capacitor including a terminal, the clip comprising:

2. The wire clamp of claim 1, wherein the first clamping portion is configured to compress the wire after mechanical cold pressing.

3. The wire clamp of claim 1, wherein the first clamping portion is U-shaped in cross section perpendicular to the wire, and the first clamping portion includes first and second oppositely disposed jaws.

4. The wire clamp of claim 3, wherein a spacing between the end of the first jaw and the end of the second jaw is less than a diameter of the wire when the first snap-in portion is not subjected to an external force.

5. The wire clamp of claim 3, wherein the first snap-fit portion defines a cylindrical receiving space.

6. The clamp of claim 1, wherein the clamp is integrally formed and the connecting plate is flat.

7. The wire clamp of any one of claims 1-6, comprising a second clamping portion identical to the first clamping portion, the first and second clamping portions being fixedly disposed on opposite sides of the connecting plate.

8. The wire clamp of claim 7, wherein the opening of the first snap-fit portion is oriented opposite the opening of the second snap-fit portion.

9. The wire clamp according to claim 7, wherein a central axis of the through hole of the connecting plate is perpendicular to a central axis of the accommodating space defined by the first catching portion and a central axis of the accommodating space defined by the second catching portion.

10. An outlet bushing, comprising:

the wire clamp of any one of claims 1-9;

a flat washer;

a spring washer;

a nut; and

and the wiring terminal sequentially penetrates through the through hole of the wire clamp, the flat washer and the spring washer and then is detachably and fixedly connected with the nut.

11. A capacitor, characterized in that the capacitor comprises:

a capacitor case;

two outlet bushings according to claim 10, which are fixed to the capacitor box and whose terminals are connected to the first and second extraction electrodes, respectively.