CN212621282U - Electricity core gas tightness detects frock - Google Patents

Abstract

The utility model provides an electricity core gas tightness detects frock, it includes the workstation, be equipped with the centre gripping unit and aerify the connecting piece on the workstation, wherein, the centre gripping unit includes but two holders of interval setting in order centre gripping electric core, and the interval between two holders is adjustable, it locates on the workstation to aerify connecting piece position adjustable, and can with form notes liquid hole sealing connection on electric core tip, and be formed with in the aerifing the connecting piece and supply the gas circulation to annotate the passageway in liquid hole, be equipped with the inflation inlet that can communicate with outside air supply on this passageway. The utility model discloses an electricity core gas tightness detects frock can realize carrying out the gas tightness to the electric core of different specifications and detect to better commonality and result of use have.

Description

Electricity core gas tightness detects frock

Technical Field

The utility model relates to a power battery technical field, in particular to electricity core gas tightness detects frock.

Background

The electric core divide into aluminium shell electricity core, soft-packaged electric core (also known as "polymer electricity core"), three kinds of cylinder electricity core, to aluminium shell electricity core, along with the development of the new model of electric core, the appearance of aluminium shell electricity core develops towards bigger direction, and at the preliminary research and development stage of electric core outward appearance, current frock, especially electric core gas tightness detection frock, it only is applicable to the electric core of specific dimensions and specifications and carries out gas tightness detection test, the electric core that leads to newly developing can't use when manufacturing, consequently, need redevelopment new frock with the gas tightness after the peripheral welding of detection electric core that can be better.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an electricity core gas tightness detects frock to can carry out the gas tightness to the electric core of different specifications and detect.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a electricity core gas tightness detects frock, includes:

a work table;

the clamping unit is arranged on the workbench and comprises two clamping pieces which are arranged at intervals and can clamp the battery core, and the interval between the two clamping pieces is adjustable;

the inflation connector is arranged on the workbench and can be in sealing connection with a liquid injection hole formed in the end part of the battery cell, a channel for gas to flow to the liquid injection hole is formed in the inflation connector, and an inflation inlet communicated with an external gas source is formed in the channel.

Furthermore, in be equipped with on the workstation and follow electric core thickness direction position adjustable regulation mount pad, in it can follow electric core width direction position adjustable first elbow clamp to be connected with on the regulation mount pad, aerify the connecting piece can dismantle connect in on the first elbow clamp.

Furthermore, the adjusting and mounting seat is provided with a first connecting end connected with the workbench and a second connecting end connected with the first elbow clamp, one of the workbench and the first connecting end is provided with a first adjusting hole in the shape of a long strip hole, the other of the workbench and the first connecting end is provided with a plurality of first positioning holes arranged at intervals along the thickness direction of the battery cell corresponding to the first adjusting hole, and the position of the adjusting and mounting seat along the thickness direction of the battery cell is adjustable due to the connection of the first adjusting hole and the first positioning holes at different positions.

Further, in be constructed on the second connection end and be the second regulation hole of rectangular poroid, the major axis in second regulation hole is followed electric core width direction sets up, and is in because of forming the fixed orifices on the first elbow clamp in the connection of the different positions in second regulation hole constitutes first elbow clamp is followed electric core width direction's position is adjustable.

Furthermore, the inflation connecting piece is provided with a screw joint end which is in screw joint with the first elbow clip and a sealing piece which can tightly push the liquid injection hole, the screw joint end is just opposite to the sealing piece, and the inflation inlet is arranged on the side wall of the inflation connecting piece.

Further, the holder including link firmly in solid fixed splint on the workstation, and locate movable splint and second elbow on the workstation press from both sides, movable splint can for the workstation slides in order to be close to or keep away from fixed splint, the second elbow presss from both sides and follows electric core thickness direction position is adjustable in order to support tightly movable splint, and because of the second elbow presss from both sides right movable splint support tightly, and constitute to lieing in fixed splint reach between the movable splint the clamp of electricity core is tight.

Furthermore, a connecting slide block is fixedly connected to the movable clamping plate, corresponding to the connecting slide block, a slide rail is arranged on the workbench along the thickness direction of the battery cell in an extending manner, and the movable clamping plate can be close to or far away from the fixed clamping plate due to the sliding of the connecting slide block on the slide rail.

Furthermore, the connection sliding block is fixedly arranged on the outer side of the movable clamping plate and is a plurality of sliding rails which are arranged at intervals along the length direction of the battery cell, and the number of the sliding rails is matched with the connection sliding block.

Further, in be equipped with on the workstation with the regulation connecting seat that the second elbow presss from both sides the connection, adjust the connecting seat have with the connecting plate that the workstation is connected, in the connecting plate with be equipped with long banding location adjustment hole on one of them of workstation, be equipped with a plurality of edge on another of both the location mounting hole that electric core thickness direction interval set up, and because of location adjustment hole and difference the connection of location mounting hole, and can constitute adjust the connecting seat in the ascending position of electric core thickness direction is adjustable.

Further, the electric core air tightness detection tool comprises a plurality of mutually connected clamping units, and the clamping units are arranged side by side along the length direction of the electric core.

Compared with the prior art, the utility model discloses following advantage has:

(1) electric core gas tightness detect frock, it is adjustable through setting up the interval between two holders, can realize effectively pressing from both sides tight location to the electric core of different thickness, the gas filled connector through setting up is adjustable for the workstation position to in the better annotate liquid hole sealing connection on the electric core with different specifications, thereby can realize carrying out the gas tightness to the electric core of different specifications and detect, and have better commonality and result of use.

(2) Through setting up along electric core thickness direction position adjustable regulation mount pad to and connect and to press from both sides along the first elbow of electric core width direction position adjustable on the mount pad, so that realize aerifing the connecting piece and for workstation position adjustable, thereby can be connected with the better cooperation in the notes liquid hole of different positions.

(3) Through the connection that sets up the first locating hole of first regulation hole and different positions to can be favorable to realizing adjusting the position of mount pad along electric core thickness direction adjustable.

(4) The fixing hole and the second adjusting hole on the first elbow clamp are arranged to be connected at different positions, so that the first elbow clamp can be adjusted in position along the width direction of the battery cell. In addition, the first elbow clamp is arranged, so that the jacking mechanism of the inflatable connecting piece is simple in structure and convenient to operate, and has a good positioning and clamping effect.

(5) Set up the spiro union end to in the detachable connection of inflatable connector in first elbow clamp, the sealing member of setting, in order to play better sealed effect to the connection of annotating the liquid hole, the spiro union end of setting is just to setting up with the sealing member, so that improve the sealing member and annotate the tight effect in top in liquid hole.

(6) Through setting up the slip of movable clamp plate on the workstation to be favorable to making movable clamp plate can be close to or keep away from fixed splint, press from both sides the tight movable clamp plate of support through the second elbow that sets up, press from both sides tightly with the location that can realize electric core tightly.

(7) Through the sliding fit of the connecting sliding block and the sliding rail, the movable clamping plate can be smoothly close to or far away from the fixed clamping plate.

(8) The connection sliding blocks are arranged at intervals, so that the movable clamping plate can be effectively prevented from deflecting in the moving process, the parallelism between the movable clamping plate and the positioning clamping plate can be improved, and further the stress of the battery cell clamped between the fixed clamping plate and the movable clamping plate is balanced.

(9) Adjust the connecting seat through setting up in order can providing the installation basis for the second elbow presss from both sides, set up the connection of location regulation hole and location mounting hole, can realize adjusting that the connecting seat can be adjustable in position on electric core thickness direction to realize that the position that the second elbow pressed from both sides is adjustable.

(10) Set up a plurality of interconnect's centre gripping unit to applicable electric core in different length specifications carries out the gas tightness and detects.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a cell airtightness detection tool according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

fig. 3 is a schematic structural view of an adjusting mount according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a connecting slider according to an embodiment of the present invention;

fig. 5 is a schematic structural view of an inflation connector according to an embodiment of the present invention;

description of reference numerals:

1-workbench, 11-slide rail, 111-fixed connecting hole, 112-sliding protrusion, 12-first positioning hole, 13-second positioning hole, 2-fixed clamping plate, 3-movable clamping plate, 31-connecting sliding block, 32-sliding chute, 4-inflation connecting piece, 41-sealing piece, 42-screwing end, 43-inflation port, 44-operation end face, 5-adjustment mounting seat, 51-first connecting end, 511-first adjustment hole, 52-second connecting end, 521-second adjustment hole, 6-adjustment connecting seat, 7-connecting plate, 71-connecting hole, 10-electric core, 20-first elbow clip and 30-second elbow clip.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to a frock is detected to electric core gas tightness, the main structure thereof includes the workstation, be equipped with centre gripping unit and inflatable connection spare on the workstation, wherein, the centre gripping unit includes but two holders of interval setting in order centre gripping electric core, and the adjustable of interval between two holders, inflatable connection spare position adjustable locates on the workstation, and can with form notes liquid hole sealing connection on electric core tip, and be formed with the passageway that supplies the gas circulation to annotate the liquid hole in the inflatable connection spare, be equipped with the inflation inlet that can communicate with outside air supply on the passageway. This electric core gas tightness detects frock, through the adjustable and position adjustable for the workstation of the connecting piece of aerifing of interval between two holders to can carry out the gas tightness to the electric core of different specifications and detect, and have better commonality and result of use.

Based on the above idea of overall structure design, as shown in fig. 1 and fig. 2, an exemplary structure of the present embodiment is that the clamping unit and the inflation connector are disposed on the workbench 1, and two clamping members in the clamping unit are clamped on a side surface of the battery cell 10, and a distance between the two clamping members is adjustable, and the inflation connector is adjustable in position relative to the workbench 1. The battery cell 10 has a rectangular parallelepiped overall structure, and for convenience of describing the present embodiment in detail, the present embodiment is described with reference to the length direction, the width direction, and the thickness direction of the battery cell 10, that is, the directions shown in fig. 1: the X axis is the length direction of the battery cell, the Y axis is the thickness direction of the battery cell, the Z axis is the width direction of the battery cell, the side surface of the battery cell 10 is clamped by the clamping unit, which is the plane where the X axis and the Z axis are located, and the liquid injection hole on the battery cell 10 is formed on the end part of the battery cell 10, that is, the end surface where the Y axis and the Z axis are located.

In order to realize the better sealing connection of the liquid injection hole that can form different positions on different specification electricity core 10 for the connector 4 of aerifing, be equipped with on workstation 1 and follow electric core thickness direction position adjustable regulation mount pad 5, be connected with on adjusting mount pad 5 and follow electric core width direction position adjustable first elbow clamp 20, connector 4 of aerifing can dismantle and connect on first elbow clamp 20, thereby make connector 4 of aerifing can follow the width direction position adjustable of electric core thickness direction and electric core, also be along Y axle direction and Z axle direction position adjustable.

In a specific structure, as shown in fig. 1 and 2 and fig. 3, the adjusting seat 5 has a first connecting end 51 connected to the workbench 1 and a second connecting end 52 connected to the first toggle clamp 20, as shown in fig. 3, the adjusting seat 5 generally includes a flat plate connected to the workbench 1 and a vertical plate vertically connected to the flat plate, the first connecting end 51 is configured on the flat plate, and the second connecting end 52 is configured on the vertical plate, wherein the vertical plate and the horizontal plate can be integrally formed, or can be fixedly connected together by welding or screwing. One of the workbench 1 and the first connection end 51 is provided with a first adjusting hole 511 in the shape of a long strip hole, and the other of the workbench 1 and the first connection end 51 is provided with a plurality of first positioning holes 12 arranged at intervals along the thickness direction of the battery cell corresponding to the first adjusting hole 511.

In this embodiment, the first connection end 51 is provided with a first adjustment hole 511, a long axis direction of the adjustment hole is arranged along the thickness direction of the battery cell, that is, the Y-axis direction, and the first positioning holes 12 are formed on the workbench 1 and are arranged at intervals along the Y-axis direction, so that the adjustment mounting base 5 is adjustable in position along the thickness direction of the battery cell, that is, the Y-axis direction, due to the connection between the first adjustment hole 511 and the first positioning holes 12 at different positions, and the inflation connection member 4 connected to the adjustment mounting base 5 can be adjustable in position along the Y-axis direction.

In order to facilitate the inflation connector 4 to be adjustable in position in the cell width direction, that is, in the Z-axis direction, a second adjusting hole 521 in the shape of a long hole is formed in the second connecting end 52, a long axis of the second adjusting hole 521 extends in the cell width direction, and due to the connection of different positions of the fixing hole formed in the first elbow clip 20 and the second adjusting hole 521, the position of the first elbow clip 20 in the cell width direction, that is, in the Z-axis direction, is adjustable.

Referring to fig. 1, 2 and 5, the inflation connector 4 of the present embodiment has a screw connection end 42 screwed with the first toggle clip 20 and a sealing member 41 capable of pushing against the liquid injection hole, the screw connection end 42 is opposite to the sealing member 41, and an inflation port 43 is provided on the sidewall of the inflation connector 4, as shown in fig. 5, an inflation joint is provided on the sidewall of the inflation connector 4, one end of the inflation joint is screwed on the inflation connector 4, and the other end forms the inflation port 43.

Connect end 42 so that realize aerifing dismantling of connecting piece 4 and first elbow clamp 20 through the spiral shell that sets up and be connected, in addition, the sealing member 41 of this embodiment is formed with the open plug of outer expanding form for the tip, and it is uncovered can carry out the closing cap to annotating the liquid hole through the outer expanding form that sets up and seal to the location top tight through first elbow clamp 20, thereby make to aerify connecting piece 4 and annotate and have better sealing connection effect between the liquid hole. In addition, to facilitate the fastening of the pneumatic connector 4 to the first elbow clip 20, an actuating end face 44 is formed on the outer wall of the pneumatic connector 4, so that the installation of the pneumatic connector 4 is facilitated.

As a preferred embodiment of this embodiment, as shown in fig. 1 and fig. 2, the clamping member of this embodiment includes a fixed clamping plate 2 fixedly connected to the workbench 1, and a movable clamping plate 3 and a second elbow clamp 30 disposed on the workbench 1, wherein the movable clamping plate 3 can slide relative to the workbench 1 to be close to or away from the fixed clamping plate 2, the second elbow clamp can be adjusted in position along the thickness direction of the battery cell to abut against the movable clamping plate 3, and the battery cell 10 located between the fixed clamping plate 2 and the movable clamping plate 3 can be positioned and clamped due to the abutment of the second elbow clamp 30 against the movable clamping plate 3.

Specifically, in order to facilitate the movable clamping plate 3 to slide along the workbench 1, as shown in fig. 1 and 4, a connecting slide block 31 is fixedly connected to the movable clamping plate 3, and a longitudinal section of the connecting slide block 31 is L-shaped, and includes a connecting vertical plate connected to the movable clamping plate 3 and a connecting transverse plate perpendicular to the connecting vertical plate and integrally formed therewith. Connect the riser in this embodiment through spiro union's mode and movable clamp plate 3 fixed connection, certainly do also through welding in movable clamp plate 3 fixed connection, connect the diaphragm in addition and slide and locate on workstation 1.

In this embodiment, corresponding to the connection sliding block 31, the slide rail 11 arranged along the extending direction of the thickness of the battery cell is arranged on the working table 1, specifically, the slide groove 32 is arranged at the bottom of the connection transverse plate, the sliding protrusions 112 are formed at two sides of the slide rail 11, the sliding protrusions 112 are limited in the slide groove 32, because the connection sliding block 31 slides on the slide rail 11, that is, the sliding protrusions 112 slide in the slide groove 32, the movable clamping plate 3 can be close to or far away from the fixed clamping plate 2, and therefore the distance between the movable clamping plate 3 and the positioning clamping plate is adjustable.

It should be noted that the sliding groove 32 of the present embodiment is formed on the intermediate connecting plate 7 located between the sliding rail 11 and the connecting transverse plate, and the intermediate connecting plate 7 is fixed to the connecting transverse plate by screwing, but the intermediate connecting plate 7 may be integrally formed with the connecting transverse plate. In addition, the slide rail 11 of the present embodiment is connected to the table 1 through the fixing connection hole 111.

For improving the depth of parallelism between movable clamp plate 3 and the locating clamp plate, connecting slide block 31 sets firmly in the outside of movable clamp plate 3 to for a plurality of along electric core length direction interval setting, and the quantity of slide rail 11 matches in connecting slide block 31 setting. In this embodiment, the number of the connecting sliders 31 is preferably two, and correspondingly, the number of the slide rails 11 is also two. Through the movement of the two connecting sliding blocks 31 arranged at intervals on the corresponding sliding rails 11, the movable clamping plate 3 can be prevented from deflecting in the moving process, and meanwhile, the battery cell 10 clamped between the fixed clamping plate 2 and the movable clamping plate 3 can be stressed evenly.

In order to facilitate the realization that the second elbow clip 30 is adjustable in position in the thickness direction of the battery cell, i.e., in the Y-axis direction, in this embodiment, the adjusting connection seat 6 connected to the second elbow clip 30 and having an L-shaped structure is disposed on the worktable 1, the adjusting connection seat 6 has a connection plate 7 connected to the worktable 1, one of the connection plate 7 and the worktable 1 is provided with a long-strip-shaped positioning adjustment hole, and the other of the connection plate 7 and the worktable 1 is provided with a plurality of positioning installation holes arranged at intervals in the thickness direction of the battery cell, preferably, the positioning adjustment holes are disposed on the connection plate 7, the positioning installation holes are disposed on the worktable 1, and the adjusting connection seat 6 is adjustable in position in the thickness direction of the battery cell due to the connection of the positioning adjustment holes and the different. In addition, the second elbow clamp 30 is tightly pressed against the movable clamping plate 3, and compared with an air cylinder, an oil cylinder and the like, the movable clamping plate has the advantages of simple structure, convenience in operation and good positioning and clamping effects.

In order to facilitate the air tightness detection of the battery cells 10 with different length specifications, the battery cell air tightness detection tool of the embodiment comprises a plurality of mutually connected clamping units, and the clamping units are arranged side by side along the length direction of the battery cell. In this embodiment, a plurality of mutually connected clamping units are arranged on the worktable 1, and the clamping units are arranged side by side along the length direction of the battery cell.

Specifically, the fixed splint 2 and the movable splint 3 are a plurality of for locating and setting up side by side on the workstation 1, correspondingly, also be a plurality of for setting up side by side with the workstation 1 of fixed splint 2 fixed connection, be equipped with connecting plate 7 on two adjacent workstations 1, all be formed with in connecting hole 71 on the position that this connecting plate 7 and two workstations 1 correspond, make corresponding connecting hole 71 link together through modes such as riveting or spiro union, with the length that can prolong the centre gripping unit, thereby can carry out the gas tightness to the electric core 10 of different length specifications and detect. Of course, the size of the working table 1 of this embodiment along the length direction of the battery cell can be made slightly larger.

The utility model discloses an electricity core gas tightness detects frock, through setting up a plurality of centre gripping units that connect side by side, and the interval between two holders is adjustable to and it is adjustable for 1 position of workstation to aerify connecting piece 4, can carry out the gas tightness to different specification and dimension's electric core 10 and detect, and have better commonality and result of use.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a electricity core gas tightness detects frock which characterized in that includes:

a table (1);

the clamping unit is arranged on the workbench (1) and comprises two clamping pieces which are arranged at intervals and can clamp the battery cell (10), and the interval between the two clamping pieces is adjustable;

aerify connecting piece (4), position adjustable locates on workstation (1) to can with form annotate liquid hole sealing connection on electric core (10) tip, just be formed with in aerifing connecting piece (4) and supply the gas circulation extremely annotate the passageway in liquid hole, be equipped with inflation inlet (43) that can communicate with outside air supply on the passageway.

2. The battery cell airtightness detection tool according to claim 1, characterized in that: be equipped with on workstation (1) and follow electric core thickness direction position adjustable regulation mount pad (5), in it can follow electric core width direction position adjustable first elbow clamp (20) to be connected with on regulation mount pad (5), aerify connecting piece (4) can dismantle connect in on the first elbow clamp (20).

3. The battery cell airtightness detection tool according to claim 2, characterized in that: the adjusting installation seat (5) is provided with a first connecting end (51) connected with the workbench (1) and a second connecting end (52) connected with the first elbow clamp (20), one of the workbench (1) and the first connecting end (51) is provided with a first adjusting hole (511) in the shape of a long strip hole, the other one of the workbench (1) and the first connecting end (51) is provided with a plurality of first positioning holes (12) arranged at intervals along the thickness direction of the battery cell corresponding to the first adjusting hole (511), and the position of the adjusting installation seat (5) along the thickness direction of the battery cell is adjustable due to the connection of the first adjusting hole (511) and the first positioning holes (12) at different positions.

4. The battery cell airtightness detection tool according to claim 3, characterized in that: constructed on second link (52) to be the second regulation hole (521) of rectangular poroid, the major axis of second regulation hole (521) is followed electric core width direction sets up, and because of forming the fixed orifices on first elbow clamp (20) in the connection of second regulation hole (521) different positions, and constitute first elbow clamp (20) are followed electric core width direction's position is adjustable.

5. The battery cell airtightness detection tool according to claim 2, characterized in that: the inflation connecting piece (4) is provided with a screwing end (42) screwed with the first elbow clip (20) and a sealing piece (41) capable of jacking the liquid injection hole, the screwing end (42) is opposite to the sealing piece (41), and the inflation port (43) is arranged on the side wall of the inflation connecting piece (4).

6. The battery cell airtightness detection tool according to claim 1, characterized in that: the holder including link firmly in solid fixed splint (2) on workstation (1), and locate movable splint (3) and second elbow on workstation (1) press from both sides (30), movable splint (3) can for workstation (1) slides in order to be close to or keep away from solid fixed splint (2), the second elbow presss from both sides (30) and follows electric core thickness direction position is adjustable in order to support tightly movable splint (3), and because of second elbow presss from both sides (30) right the support of movable splint (3) tightly, and constitute to be counterpointed in solid fixed splint (2) reach between movable splint (3) the clamp of electricity core (10) is tight.

7. The electric core airtightness detection tool according to claim 6, characterized in that: connect sliding block (31) on activity splint (3), corresponding to connect sliding block (31), in be equipped with on workstation (1) and follow slide rail (11) that electric core thickness direction extends to arrange, and because of connect sliding block (31) in slip on slide rail (11), and can constitute activity splint (3) for being close to or keeping away from of fixed splint (2).

8. The battery cell airtightness detection tool according to claim 7, characterized in that: the connecting sliding blocks (31) are fixedly arranged on the outer side of the movable clamping plate (3) and are arranged at intervals along the length direction of the battery cell, and the number of the sliding rails (11) is matched with that of the connecting sliding blocks (31).

9. The electric core airtightness detection tool according to claim 6, characterized in that: in be equipped with on workstation (1) with the regulation connecting seat (6) that second elbow clamp (30) are connected, adjust connecting seat (6) have with connecting plate (7) that workstation (1) is connected, in connecting plate (7) with be equipped with rectangular form location adjustment hole on one of them of workstation (1), be equipped with a plurality of edges on another of them the location mounting hole that electricity core thickness direction interval set up, and because of location adjustment hole and difference the connection of location mounting hole, and can constitute adjust connecting seat (6) in the ascending position of electricity core thickness direction is adjustable.

10. The electric core airtightness detection tool according to any one of claims 1 to 9, characterized in that: the electric core air tightness detection tool comprises a plurality of mutually connected clamping units, and the clamping units are arranged side by side along the length direction of the electric core.

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