CN210628170U

CN210628170U - Female contact

Info

Publication number: CN210628170U
Application number: CN201922248011.2U
Authority: CN
Inventors: 闫淼江
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-05-26
Anticipated expiration: 2029-12-13

Abstract

The utility model provides a female contact, including electrically conductive arm, the outer peripheral face of the front end of electrically conductive arm include electrically conductive contact surface, respectively around electrically conductive arm and with a plurality of contact fingers, the setting that electrically conductive contact surface of electrically conductive arm contacted are in the fixed stopper and the cover in the front end inboard or the outside of electrically conductive arm will touch the outside that indicates and indicate the extrusion to be in extruded article on the front end of electrically conductive arm. The female contact can ensure the reliability of the contact and is easy to assemble and process.

Description

Female contact

Technical Field

The utility model relates to a female contact in isolator fracture subassembly that adopts among the well high voltage power transmission and distribution system.

Background

The traditional female contact comprises a conductive arm, a contact finger and the like, wherein the traditional contact finger is in a rod shape or a plate shape, and the number of the contact finger is small, so that the contact point number is small, the conductive effect is poor, and the heating is easy to cause.

In the applicant's patent application zl 201623291. x, a female contact is disclosed which omits a pressing plate, a bolt, and the like for pressing a contact finger against a conductive arm, but is provided at the outer periphery of the conductive arm using a tapered sleeve, and presses the contact finger against the conductive arm by wedge action of the tapered sleeve and the end of the conductive arm, thereby increasing the number of contacts. In order to ensure that the contact fingers are uniformly distributed around the conductive arm, the female contact also comprises a positioning ring for determining the position of the contact fingers, and the inner periphery of the conical sleeve is also provided with a groove for preventing the contact fingers from moving, so that the number of parts of the female contact is increased, and the cost is increased. However, the female contact has the problems that a conical opening surrounded by the contact fingers is in an inverted cone shape, the diameter of the opening is gradually reduced outwards, the resistance is large during the operation of combining or separating with the male contact, particularly during the operation of separating a fracture, and the requirement on the machining precision of the locating ring is high. In addition, in the assembling process, the positioning ring and the positioning groove of the conical sleeve have silver coatings which can scratch contact fingers, so that safety implication is caused. In addition, because the locating ring and the conical sleeve correspond to the contact fingers one to one, the number of the contact fingers cannot be changed after the product is shaped and produced.

On the other hand, when the female contact is installed on site, an installer needs to hammer the conical sleeve in place by a hammer, so that the installation process is time-consuming and labor-consuming, the standard installation quality cannot be guaranteed, the contact between the contact finger and the conductive arm cannot meet the requirement due to the fact that the hammering is not in place, and potential safety hazards and fault sources in use are brought. Further, the contact finger or the tapered sleeve may be damaged during hammering, and the position of the contact finger may be changed, so that the position of the contact finger needs to be constantly adjusted during assembly.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned problem among the prior art, an object of the utility model is to provide a handling instrument of easy dismouting contact in scene, this handling instrument easy operation, laborsaving, the standard prevents that the contact from damaging in handling.

Another object of the utility model is to provide a can be by this loading and unloading job site installation and the cloudy contact of dismantlement, this cloudy contact simple structure, strong adaptability has avoided the open operating resistance of back taper problem that increases to can change the quantity that touches the finger as required.

Still another object of the present invention is to provide a male contact which can be assembled and disassembled by the assembling and disassembling tool, the male contact has a simple structure and is easy to disassemble and assemble.

According to an aspect of the present invention, there is provided a female contact, including a conductive arm, the conductive arm is in a circular tube shape, and includes a conductive contact surface, a plurality of fingers which contact the conductive contact surface of the conductive arm, and an extrusion member which extrudes the fingers on the conductive contact surface of the conductive arm, at an outer peripheral surface or an inner peripheral surface of a front end thereof, characterized in that a circumferential surface of the extrusion member which contacts the fingers is tapered along an axial direction of the conductive arm.

The conductive contact surface is arranged on the outer peripheral surface of the front end of the conductive arm, the extrusion piece is a conical sleeve, and the inner peripheral surface of the conical sleeve is conical.

The female contact may further include a fixing plug disposed inside the front end of the conductive arm.

The front end of the conductive arm is provided with a groove, and a spring clamping ring is arranged in the groove to fix the position of the fixing plug.

The front end of the fixing plug is provided with a chamfered chamfer which abuts against the spring collar when the fixing plug is pulled outwards.

The fixing plug is provided with a threaded hole in the center of the front end face of the fixing plug.

The conductive contact surface of the conductive arm is formed as an inclined surface having a diameter gradually enlarged.

The rear side of the conductive contact surface of the conductive arm forms a positioning convex edge or a positioning groove, the contact finger is arranged at the rear end of the inclined surface to form a positioning groove or a convex edge, the inclined surface of the contact finger is in contact with the conductive contact surface of the conductive arm, and the positioning convex edge or the positioning groove of the conductive arm is in contact with the positioning groove or the convex edge of the contact finger.

The conductive contact surface of the conductive arm is a cylindrical surface, and the portion of the contact finger to be in contact with the conductive contact surface of the conductive arm is formed as an inclined surface.

The conductive contact surface of the conductive arm is a cylindrical surface, the contact finger comprises a contact portion in contact with the conductive contact surface of the conductive arm and an outer portion opposite to the contact portion, and the outer portion is formed into an inclined surface.

The conductive contact surface is arranged on the inner peripheral surface of the front end of the conductive arm, the extrusion piece is an extrusion plug, and the outer peripheral surface of the extrusion plug is tapered.

The front end of the conductive arm comprises an expanding section with an enlarged diameter, and the conductive contact surface is arranged on the inner circumferential surface of the expanding section.

The conductive contact surface is formed as a tapered surface gradually expanding toward the front end of the conductive arm, and the outer periphery of the squeeze plug is tapered gradually increasing toward the front end.

The contact finger includes a conductive contact area in contact with a conductive contact surface of the conductive arm, the conductive contact area being formed as an inclined surface.

The contact finger is provided with a positioning groove at one side opposite to the conductive contact area, and a positioning boss is arranged at the rear side of the conductive contact area in the inner peripheral surface of the conductive arm and is matched into the positioning groove of the contact finger during assembly.

The outer peripheral surface of the squeeze plug is tapered such that the diameter of the squeeze plug gradually decreases from the rear to the front.

An axial threaded hole is formed in the front end face of the extrusion plug.

With the female contact in the present disclosure, the structure of the female contact can be simplified and the reliability of the female contact can be improved.

Drawings

The foregoing and other features, advantages and technical advantages of the present disclosure will be understood from the following detailed description of preferred embodiments of the present disclosure with reference to the accompanying drawings in which dotted areas indicate cross-sections:

FIG. 1 illustrates a schematic view of a break assembly showing a female contact and a male contact according to one embodiment of the invention;

FIG. 2 illustrates a partially cut-away perspective view of the female contact shown in FIG. 1;

FIG. 3 shows a partially cut-away perspective view of a variation of the female contact shown in FIG. 1;

FIG. 4 shows a partially cut-away perspective view of yet another variation of the female contact shown in FIG. 1;

fig. 5 shows a schematic view of a handling tool which can be used for field mounting and dismounting of the female contact, arranged in the state in which the female contact is mounted, the female contact being omitted and the anchor ear being partly broken away for clarity;

fig. 6 and 7 are schematic views of the handling tool according to the present invention for mounting and dismounting the female contact shown in fig. 1, wherein fig. 6 is a schematic view of mounting the female contact and fig. 7 is a schematic view of dismounting the female contact;

fig. 8 is a partially cut-away perspective view showing a female contact according to a second embodiment of the invention;

FIG. 9 is a partially cut-away perspective view showing a male contact that may be mated with a female contact;

FIG. 10 is a partially cut-away perspective view illustrating a variation of the female contact shown in FIG. 8;

fig. 11 is a partially cut-away perspective view showing still another modification of the female contact shown in fig. 8;

fig. 12 and 13 are schematic views of mounting and dismounting the female contact shown in fig. 10 using a handling tool according to the present invention, in which fig. 12 is a view showing a mounting state and fig. 11 is a view showing a dismounting state;

FIG. 14 is a variation of the use of the handling tool of FIG. 12 in accordance with the present invention, illustrating a schematic view of the female contact of FIG. 8 mounted thereon;

fig. 15 is a schematic view showing a handling tool for mounting and dismounting the male contact shown in fig. 9, the handling tool being shown in a mounted state;

FIG. 16 is a view showing a modification of the handling tool of FIG. 15; and

fig. 17 is a partially cut-away perspective view showing a female contact of a simplified structure.

Detailed Description

Preferred embodiments according to the present invention are described in detail below with reference to the accompanying drawings. It is noted that the description is intended for purposes of illustration only and not for limitation, and that those skilled in the art will recognize that the invention can be embodied in many forms and should not be construed as limited to the preferred embodiments set forth herein.

In the following description, directional terms such as "forward", "rearward", "inward", "outward", etc., are used, it being understood that these directional terms are intended to facilitate a better understanding of the specification, and are not intended to limit the scope of the present invention, as those skilled in the art will recognize upon an understanding of the present invention. In the description and in the appended claims, "forward", "front side" and the like refer to the direction pointing from the conductive arm towards the ends of the female and male contacts that are to be in contact with the mating contact (i.e. towards the direction of the interruption), while "rearward", "rear side" and the like refer to the direction opposite to "forward", "front side" and the like (i.e. away from the direction of the interruption). "inwardly" or "inboard" refers to a direction in the radial direction closer to the longitudinal axis of the conductive arm, while "outwardly" or "outboard" refers to a direction away from the longitudinal axis of the conductive arm.

In addition, in the specification and the appended claims, ordinal numbers "first", "second", etc., are used, but it is to be understood that the ordinal numbers are used merely for distinguishing one feature from another, and do not emphasize the positional relationship, importance, etc., between the features, and thus, a feature that is entitled to "first" may also be referred to as "second", which does not affect the effects of the invention and also falls within the scope of the invention.

Preferred embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. As shown in fig. 1, the breaking assembly generally comprises a female contact 1 and a male contact 2, and the female contact 1 and the male contact 2 can be in an engaged state and a separated state under the driving of the disconnecting switch operating mechanism. The female contact 1 includes, for example, a conductive arm 21 and a contact finger 30 electrically connected to the conductive arm 21, and the contact finger 30 is fitted around the front end of the conductive arm 21 and formed in a shape gradually enlarged at the open end so that the contact portion 206 of the male contact 2 fits into the open space surrounded by the contact finger 30 and makes electrical contact with the contact finger 30.

Fig. 2 further shows an exploded view of the female contact 1, partly broken away, with the tapered sleeve 41 partly broken away and with some of the fingers 30 removed, in order to show the internal structure of the female contact 1 more clearly.

As shown in fig. 2, the female contact 1 includes a conductive arm 21, the conductive arm 21 is a substantially cylindrical tube made of a good conductor material, and a circle of grooves 211 is formed in the vicinity of the rear end of the contact region of the conductive arm 21 in the circumferential direction, and a cylindrical surface of the conductive arm 21 between the front end thereof and the grooves 211, which is formed to have a constant diameter, is a portion where the contact finger 30 is attached to each other, that is, a conductive contact region 212.

As shown in the lower part of fig. 2, the contact finger 30 is a rod-shaped, preferably round rod-shaped, made of a good conductor material having elasticity, and at the rear end portion of the contact finger 30, at a portion to be brought into contact and fit with the conductive contact portion 212 of the conductive arm 21, an inclined surface 306 is formed as a conductive contact surface, the inclined surface 306 being preferably set at an angle of generally 1 ° to 3 ° with respect to the cylindrical surface of the contact finger to match the angle of the inner tapered surface of a tapered sleeve to be described later, and terminating at a boss 307 at the rear end of the contact finger 30, the boss 307 being formed so as to be fitted into the recess 211 of the conductive arm 21, whereby the contact finger 30 can be positioned in the longitudinal direction of the conductive arm 211.

On the outside of the contact finger 30, a tapered sleeve 41 is provided to clamp the contact finger 30 between the conductive arm 21 and the tapered sleeve 41, the inner wall of the tapered sleeve 41 is a conical hole, the inclined angle of the inner wall of the tapered hole of the tapered sleeve 41 is equal to the inclined angle of the conductive contact surface 306 of the contact finger so as to match the tapered profile formed around the periphery of the contact finger, and the tapered sleeve 41 is made of a non-magnetic material.

It will be appreciated that the relationship between the circular rod-shaped fingers 30, the conductive arms 21 and the tapered sleeves 41 is such that the contact surfaces 306 of a plurality of fingers 30 (a suitable number of rod fingers may be provided) distributed around the circumference of the cylindrical surface 212 meet towards the contact surface 212 of the conductive tube 21. The tapered sleeve 41 is fitted around the outer periphery of the plurality of contact fingers 30, and when the tapered sleeve 41 is pushed forward by an assembling tool (described in detail below) so that the conductive contact surface 306 of the contact finger 30 is strongly pressed against the columnar conductive contact surface 212, approximate surface contact is formed in an approximately triangular contact region of the contact finger 30, whereby the contact finger 30 is brought into close electrical contact with the conductive tube 21 and fixed to the front end of the conductive tube 21, thereby forming a flared opening of the female contact 1 which gradually increases from the rear to the front so as to be electrically engaged with the male contact 2.

In addition, in order to avoid the pressure exceeding when the conical sleeve 41 is pushed to clamp the contact finger 30 during assembly, which causes the conductive contact area 212 of the conductive arm 21 to deform or collapse, and also to facilitate easy maintenance and disassembly, the inner hole at the front end of the conductive tube 21 may be provided with a fixing plug 50 and a spring collar 52, which are used as a pulling fulcrum of a loading and unloading tool to strengthen the strength of the inner wall of the conductive contact area 212 of the conductive arm, but it is to be understood that other strengthening measures may be adopted, and the invention is not limited thereto.

As shown in the upper part of fig. 2, the fixing plug 50 is a substantially cylindrical plug, which is formed at its front end with a chamfered chamfer and at the center of the front end with a threaded hole. A groove 521 is circumferentially formed at the front end of the inner hole wall of the conductive arm 21, and preferably the groove 521 may have a semicircular cross section to receive a spring collar 52 having a circular cross section, and the spring collar 52 is a circular ring preferably made of spring steel wire and having an opening, but the present invention is not limited thereto. After the securing plug 50 is plugged into the front end inner wall of the conductive arm 21, the spring collar 52 may be pressed into the semi-circular inner groove 521 such that the chamfered slope of the securing plug 50 rests against the inside of the spring collar 52. When the fixed plug is pulled out by an external force, the chamfered slope of the front end of the fixed plug abuts against and presses the spring collar 52, so that the spring collar 52 locks the fixed plug 50.

As can be seen from the above description, the inclined conductive contact surface formed on the contact finger 30 is matched with the cylindrical conductive contact surface at the front end of the conductive arm, so that the peripheral contact finger cylindrical surface is surrounded by a tapered outer profile which is gradually increased forward, and the taper angle of the inner wall of the tapered sleeve is matched with the tapered outer profile. On the other hand, by processing a boss at the rear end of the contact finger 30 and forming a groove at the corresponding position of the conductive arm, the contact finger 30 can be positioned in the longitudinal direction by the cooperation of the boss and the groove. Thus, the female contact according to the present invention can be simplified in structure as compared with the female contact in the prior application, and the opening of the female contact composed of the rod-shaped fingers is formed as a flare opening gradually expanding forward.

Figure 3 shows a variant of the female contact shown in figure 2. Since the inclined conductive contact surface 306 is processed on the round bar-shaped contact finger 30 in the structure of the embodiment described in fig. 2, the required processing precision is high; in addition, the formation of the groove 211 on the conductive arm 21 will reduce the effective conductive section of the conductive arm 21, so in order to improve the performance and reduce the cost, as shown in fig. 3, the conductive contact zone 213 at the front end of the conductive arm 21 is formed in a cone shape, the diameter of the cone shape of the conductive contact zone 213 is expanded from back to front, and a ring-shaped convex edge 214 capable of matching with the groove is circumferentially arranged behind the contact zone 213. Meanwhile, the rear end of the round rod-shaped contact finger 31 is formed with a groove 314 perpendicular to the longitudinal axis and matched with the annular convex edge 214, and the groove 314 and the annular convex edge 214 are matched to fix the contact finger 31 in the direction of the longitudinal axis at the conductive contact area 213.

The annular ledge 214 has a rectangular cross section, for example, and in order to form such a ledge on the conductive arm, as an example, the annular ledge is formed by turning a shallow groove on the conductive arm, machining the annular ledge into a ring-shaped break by using a non-magnetic metal, fitting the ring-shaped break into the groove, and then connecting the ring-shaped break and the groove. Of course, it may be formed by welding, riveting, or screwing.

After the contact finger 31 is arranged around the conductive contact area of the conductive arm and the groove 314 of the contact finger 31 is fitted on the ledge 214 of the conductive arm, the conical sleeve 41 is slipped over the outside of the contact finger 31, thereby clamping the contact finger 31 in the annular space between the conical sleeve 41 and the conductive arm contact area 213. In the process of pushing the tapered sleeve 41 to the right, the inner wall of the tapered sleeve 41 pushes the cylindrical surface of the contact finger 31 to the periphery of the tapered contact area 213 of the conductive tube, so that the contact finger 31 and the conductive arm contact area 213 form close line contact, and therefore, the contact finger 31 is fixed and electrically connected to the front end of the conductive tube 21, so that the processing process of the contact finger 31 can be reduced, and the influence of the processing error on the assembly can be avoided. Furthermore, the loss of the effective conductive section of the conductive arm 21 is relatively reduced.

In the above embodiment, the annular boss 214 may be formed by welding, riveting, or the like, and is preferably made of a non-magnetic material.

Fig. 4 shows another variant of the female contact shown in fig. 3, in which each of the round-bar-shaped fingers 33 is formed on the outer side with an inclined plane (or arc) 336, the conductive contact area 215 of the conductive arm 21 is formed as a cylindrical surface of equal diameter, as described above, and a ring of raised bosses 214 is provided around the outer circumference at the rear of the conductive contact area 215, and a groove 334 is transversely provided on the inner side of the rear end of each of the fingers 33 to be engaged with the bosses 214, so that the fingers 33 surround the contact area 215 when assembled, and the fingers 33 are axially positioned by the engagement of the grooves 334 and the bosses 214, whereby the inclined planes (or arcs) 336 on the outer circumference of the rear sections of the plurality of fingers 33 form a cone shape and are pressed by the cone-shaped sleeve 41 around the contact area 215 of the conductive arm 21, thereby forming an opening of a cylindrical space on the inner side of the fingers 33. To avoid the problem of increased resistance caused by the reverse tapered opening in operation as previously described.

Next, a handling tool according to the present invention and a method for mounting and dismounting the female contact using the handling tool will be described in detail with reference to fig. 5 to 7.

As shown in fig. 5, the handling tool according to the present invention comprises a body frame including a top plate 81, a coupling means 6 capable of coupling the taper sleeve 41, and a plurality of support rods 7 connecting the top plate 81 and the coupling means 6 to each other and enclosing a space in which the driver and the positioning bush are placed. Wherein, as shown in fig. 5, the engagement means 6 may be in the form of a hoop comprising two

hoops

6A and 6B, each

hoop

6A and 6B comprising a semi-circular cavity, and flanges 6A1, 6A2 and 6B1, 6B2 formed at both ends of the semi-circular cavity(s) (fig. 5)Not shown in the drawings) when fastened, the two

anchor ears

6A and 6B form a structure having a cylindrical cavity with flanges at both ends of the cylindrical cavity, whereby the conical sleeve 41 is received in the cylindrical cavity and the flanges 6A1, 6A2 or 6B1, 6B are provided2Against the front or rear end face of the conical sleeve 41 (depending on whether it is mounted or dismounted). In order to fasten the two

anchor ears

6A and 6B, through-hole pedestals 601 are respectively protruded from both side surfaces of the

anchor ears

6A and 6B, and two such

half anchor ears

6A and 6B are fastened to each other, as shown in fig. 5, the two pedestals 601 are aligned and overlapped with each other, and support bars such as

screws

7A and 7B penetrate and connect the two overlapped pedestals 601 crosswise to form a whole. In addition, the

anchor ears

6A and 6B can be locked in the longitudinal axis direction by nuts 602 screwed to the threaded

rods

7A, 7B, whereby the

anchor ears

6A and 6B are coupled with the top plate 81.

In the space surrounded by the body frame, between the top plate 81 and the front end face of the conductive arm 21 of the female contact, a driver 9 is provided in sequence, the driver 9, a push plate 82, a positioning bush 84 and a baffle plate 83, and these parts are passed through by a central rod, for example, a central screw 73. The actuator 9 may for example take the form of a jack, but the invention is not limited thereto and may take the form of other actuators, such as hydraulic cylinders, pneumatic bars, electric mechanisms, etc.

In addition, the positioning bush 84 is for determining the position of the contact fingers 30 around the circumferential direction of the conductive arm 21, and as shown in fig. 5 and 6, the positioning bush 84 includes a generally conical body and a disk portion formed at one end of the body, a plurality of grooves 841 are formed at equal angles in the outer circumferential surfaces of the body and the disk portion, the plurality of grooves 841 are tapered or cylindrical in the direction of the longitudinal axis to accommodate the opening angle of the contact fingers 30, and the number of the grooves 841 is the same as the number of the contact fingers 30 fitted into the female contact so that the contact fingers 30 can be inserted into the respective grooves 841 at equal intervals. A through-hole 842 is formed in the center of the positioning bush 84 in the longitudinal axis direction so that the center screw 73 passes through.

Next, an operation of mounting and dismounting the female contact shown in fig. 1 or fig. 2 or fig. 3 or fig. 4 using the handling tool according to the present invention will be described with reference to fig. 5 to 7, in which fig. 5 is a state view of the handling tool when mounting the female contact, in which the illustration of the female contact is omitted for clarity, and fig. 7 is a state view of the handling tool when dismounting the female contact.

In assembling the female contact 1 as shown in fig. 2 or 3, the fixing plug 50 is first inserted into the front end of the conductive arm 21 and the fixing plug 50 is positioned by means of the spring collar 52. The contact fingers 30(31, 33) are placed around the positioning bush 84 and around the conductive contact area of the conductive arm 21, and the bosses 307 of the contact fingers 30 are positioned in the recesses 211 of the conductive arm or the

grooves

314, 334 of the

contact fingers

31, 33 are snapped onto the raised edge 214 of the conductive arm 21. Then, the tapered sleeve 41 is sleeved on the periphery of the plurality of

contact fingers

30, 31, 33, and at the same time, the positioning bush 84 is used to position the

contact fingers

30, 31, 33 in the circumferential direction of the

contact area

212, 213, 215 of the conductive arm, and the

anchor ears

6A, 6B are used to pass through and lock the two

side screws

7A, 7B so as to fix the contact fingers together, and the tapered sleeve 41 is embraced therein, the other ends of the side screws 7A, 7B are connected with the top plate 81, the other end of the side screws 73 passes through the top plate 81, the jack 9, the central screw 73 is in threaded engagement with the push plate 82, and passes through the positioning bush 84, the baffle 83 and the fixing plug 50, the baffle 83 is in threaded engagement with the central screw 73 and abuts against the front end of the conductive arm 21, then the push plate 82 is screwed on one end of the jack 9.

After the above-described assembly is completed, the loading and unloading tool is in a state shown in fig. 6, at which the jack 9 is driven, the jack 9 pushes the push plate 82 and pushes the push plate 81 by the push plate 82 against the front end of the conductive arm so that the other end of the jack 9 pushes the top plate 81, and since the top plate and the center screw 73 are slidable relative to each other, the top plate 81 is pushed in the rightward direction in fig. 6, and this pushing force is transmitted to the anchor ear 6 through the

screws

7A and 7B on both sides, whereby the tapered sleeve 41 is pulled forward (rightward direction in fig. 6) by the anchor ear 6, whereby the tapered sleeve 41 is pressed against the outer peripheries of the plurality of

contact fingers

30, 31, 33.

In this way, by simple operations, the female contact 1 can be assembled and the clamping force of the tapered sleeve 41 and the conductive arm on the contact finger 30(31, 33) can be determined by setting the thrust of the jack 9. By using the positioning bush 84 to determine the position of the contact fingers 30(31, 33) in the circumferential direction of the conductive arm 21, it is possible to omit the positioning ring provided in the female contact in the related art, and further, the inner peripheral surface of the tapered sleeve does not have to form the contact finger positioning groove, thereby simplifying the structure of the female contact.

The female contact assembling and disassembling tool is convenient to carry, can be quickly assembled and operated on site, can be realized by tools such as a manual jack and a hydraulic jack, can realize the installation of the female contact under the condition of no power supply on site, and improves the field maintenance efficiency of the fracture assembly.

Furthermore, the positioning bush for positioning the contact fingers is included in the assembling and disassembling tool, so that the number or the position relation of the contact fingers in the female contact can be conveniently adjusted by replacing the positioning bush, and the adaptability of the female contact is improved.

When the female contact needs to be disassembled, as shown in fig. 7, the hoop 6 is firstly clamped outside the conical sleeve 41 through the

screws

7A and 7B at two sides, the central screw 73 passes through the jack 9, compared with the situation when the female contact is assembled, the positioning bush 84 and the baffle 83 can not be assembled when the female contact is disassembled, in addition, the positions of the push plate 82 and the top plate 81 are exchanged, namely, the push plate 82 is arranged at the right end (the right end in fig. 7) of the jack 9 and is in threaded engagement with the central screw 73, the top plate 81 is moved to the left end (the left end in fig. 4) of the jack and is connected with the hoop 6 by the

screws

7A and 7B, the central screw 73 passes through the jack 9 and the top plate 81, namely, the jack 9 and the top plate 81 can slide along the central screw, and then the central screw 73 is screwed into the fixing plug 50. At this time, when the jack 9 is driven by the hydraulic oil pump and the oil pipe 91 (in the case of an oil jack), since the jack 9 is pressed by the push plate 82 and cannot move rightward, the thrust of the jack 9 is converted into the pressure by the

screws

7A and 7B on both sides to press the anchor ear 6 rearward (leftward in the drawing), so that the tapered sleeve slides out rearward from the outside of the contact finger and the female contact is detached.

Therefore, the female contact can be simply installed and detached on site through a set of assembling and disassembling tools.

From the above description it can be seen that the engagement means 6 of the handling tool with the cone 41 are realized in the form of a hoop, whereby the same hoop can be used both for mounting and dismounting. However, the invention is not limited thereto and other configurations of the engagement means 6 may be used and also two sets of engagement means 6 may be used to enable mounting and dismounting of the cone sleeve with different engagement means 6 at mounting and dismounting.

A female contact and a handling tool for mounting and dismounting the female contact according to a second embodiment of the present invention will be described below with reference to fig. 8 to 14. It is to be noted that in the following description, the same features as those in the first embodiment of the present invention described above with reference to fig. 1 to 7 are given the same reference numerals, and detailed description thereof will be omitted to avoid redundancy and ambiguity of the present specification.

As shown in fig. 8, the female contact 1 includes a conductive arm 22 made of a good conductor material, a round bar-shaped contact finger 32 made of a good conductor having elasticity, and a tapered squeeze plug 42. The inner hole wall of the front end of the conductive arm 22 is machined into a tapered hole 222 gradually expanding towards the front end, the taper angle of the tapered hole 222 is matched with the taper angle of the extrusion plug 42, the taper angle is generally set to be 2-6 degrees so as to distribute a proper number of contact fingers 32 in the tapered hole 222 of the conductive arm, the extrusion plug 42 is wedged into the rear end of an opening surrounded by the contact fingers 32 backwards, the contact fingers 32 are extruded on the inner wall of the tapered hole 212, and therefore the inner sides of the contact fingers form a horn-shaped opening gradually increasing from back to front, and resistance increase caused by opening and closing operation is avoided. And a threaded hole 421 may be machined in the center of the squeeze plug 42 to mate with a loading and unloading tool to be described later.

To facilitate assembly and disassembly of the female contact 1 using a handling tool, a groove 221 is machined in the outer peripheral surface of the conductor arm at the rear side of the conductor arm contact area 222 to mate with the engagement means 61 of the handling tool. Alternatively, a ring of raised bosses, preferably a ring of grooves, may be formed on the periphery of the conductive arms by welding. The handling tool will be described in detail below.

By adopting the structure of the female contact 1 according to the second embodiment, the maintenance and debugging work of the female contact can be further simplified, and when the cost is saved, the female contact is preferably manufactured by aluminum or aluminum alloy, however, because the copper-aluminum conductive contact generates the galvanic corrosion characteristic, the conductive contact areas of the conductive arm and the contact finger can be respectively subjected to surface plating treatment to avoid the galvanic corrosion problem. In addition, this second embodiment also simplifies the structure more, thereby improving reliability.

Fig. 9 shows a male contact 2 that can be used in cooperation with the female contact described above. The male contact 2 includes a conductive arm 205, and the conductive arm 205 may be, for example, an aluminum or aluminum alloy conductive arm. At the front end of the conductive arm, a contact body of a male contact is connected, which contact body comprises a contact zone 201, a cylindrical support zone 202 and a cone-shaped connection zone 203, the front end of the conductive arm 205 likewise being formed with a cone-shaped bore 206, into which cone-shaped connection zone 203 of the contact body of the male contact is pressed in order to wedge-fit and conduct electricity with the cone-shaped bore 206 of the conductive arm. The contact region 201 is substantially pie-shaped and has a larger diameter than the support region 202.

Similar to the female contact, the connection region 203 and the tapered hole 206 are also subjected to surface plating treatment to prevent galvanic corrosion. To facilitate assembly and disassembly of the male contact 2, similar to the female contact, a groove 207 may be formed in the outer peripheral surface of the conductive arm 205 to engage a handling tool, as described in detail below.

Through the structure matching process, the problem that the contact main body of the male contact made of copper or copper alloy is welded with the conductive arm made of aluminum or aluminum alloy is solved.

A modification of the female contact according to the second embodiment of the invention is described below with reference to fig. 10.

The diameters of the conductive arms of the aluminum circular tube on the two sides of the fracture are preferably the same, meanwhile, in order to avoid scraping or electrical abrasion between the round rod contact fingers 32 of the female contact and the rear part of the male contact in the fracture opening and closing operation, the rear part of the male contact area should be reduced to form the conductive gap bridge (support area), sometimes, the diameter of the support area at the rear part of the male contact area needs to be increased as required for bearing current, the outline diameter of the male contact area should be properly larger than that of the conductive gap bridge, however, the diameter of the opening of the female contact surrounded by the round rod contact fingers 32 is limited by the inner hole of the conductive arms and is smaller than the diameter which should be matched with the male.

To solve this problem, as shown in fig. 10, according to a modification of the present invention, the diameter of the front end of the conductive arm 23 of the female contact 1 is enlarged to enlarge the opening surrounded by the round bar-shaped fingers 32, which is required for the mutual engagement with the male contact 2. To realize an enlarged front end, a certain length of diameter-expanded aluminum tube 24 is welded to the front end of the conductive arm 23. The inner hole of the expanding section 24 is formed into a flared taper hole 242 with the diameter gradually increasing from back to front, and the cone-shaped pressing plug 42 matched with the flared taper hole 242 presses the round rod contact finger 32 into the expanding taper hole 242 of the conducting arm 23, so that the opening of the female contact 1 is formed into a flared opening with the diameter increasing from back to front and is matched with the male contact 2. Alternatively, the expanded diameter section 24 of the conductive arm may be formed by extruding the heated aluminum tube 23 using a die to form the expanded diameter section 24.

In order to make the space enclosed by the fingers of the female contact be formed into an opening with a constant diameter to adapt to the requirement of the male contact to be jointed, referring to fig. 11, according to a further variant of the female contact of the second embodiment of the present invention, it is preferable that the conductive arm 25 is welded or pressed at its front end to form an expanded diameter section 26, the inner hole of the expanded diameter section 26 is formed into a cylindrical hole with a constant diameter as a conductive contact area 262, and a clamping platform 264 is raised near the bottom end (rear) of the conductive contact area 262, on the other hand, a surface 346 inclined with the axial direction is processed at the inner side of the root (rear) of the round bar-shaped finger 34, and a groove 347 is transversely opened near the root at the outer side of the finger 34 to cooperate with the clamping platform 264 to axially position the finger 34. The outer periphery of the squeeze plug 43 is tapered from back to front, and the squeeze plug 43 is also provided with a screw hole 431 in the axial direction. When assembled, the outer cylindrical surface of the fingers 34 abut the conductive contact surfaces 262 of the conductive arms 25, the recesses 347 snap over the bosses 264 at the rear of the contact surfaces 262 to axially locate the round bar fingers 34, and the fingers 34 define an inner conical surface with the sloped surfaces 346 of the fingers facing inwardly, and the squeeze plugs 43 wedge into the tapered inner bore and press the fingers 34 against the conductive arm contact surfaces 262 from the rear to the front, thereby securing the plurality of round bar fingers 34 in the inner bore 262 at the front ends of the conductive arms 25 to form a cylindrical opening.

Next, referring to fig. 12, a contact handling tool according to the present invention and an operation of assembling and disassembling a female contact according to a second embodiment of the present invention using the same are described, wherein the modification described in fig. 10 is exemplified, but it will be understood by those skilled in the art that the handling tool can be applied to any female contact according to the present invention. It is further noted that the handling tool shown in fig. 12 is similar to the handling tool described above with reference to fig. 5 to 7, and therefore like features will be given like reference numerals and detailed description thereof will be omitted.

As shown in fig. 12, the contact attaching/detaching tool includes a main body frame composed of a top plate 81, a contact engaging device 6, and

support rods

7A and 7B, and a driver 9, a push plate 82, and a positioning bush 84 are sequentially provided in a space surrounded by the main body frame via a center screw 73, and is different from the attaching/detaching tool described in fig. 5 to 7 in that a baffle plate may be omitted in the attaching/detaching tool of fig. 12.

As shown in fig. 12, when assembling the female contact, the contact engagement means 6, such as the

anchor ears

6A and 6B, are snapped onto the enlarged diameter section 24 of the female contact 1 shown in fig. 9 and connected to the top plate 81 by means of support rods, such as the

screws

7A and 7B, and fixed in place by means of nuts.

The center screw 73 passes through the top plate 81, the driver 9 in the form of a jack, and is screw-engaged to the push plate 82, and then the center screw 73 further passes through the positioning bush 84 and is screwed at its end into the screw hole 421 of the squeeze plug 42. The groove 841 of the positioning bushing is adapted to the installation position and the opening angle of the contact finger 32, and is provided with a through hole 842 in the central axial direction. The contact finger 32 determines the circumferential position in the inner hole of the diameter-expanded section 24 of the conductive arm through the positioning bush 84, then, by driving the jack, since the top plate 81 is connected with the conductive arm or the diameter-expanded section 24 by means of the

support rods

7A and 7B and the

hoops

6A and 6B, the pushing force of the jack will push the central screw 73 to move towards the rear side direction of the conductive arm through the push plate 82, and further drive the extrusion plug 42 to move backwards in the inner hole of the diameter-expanded section 24 of the conductive arm, so that the contact finger 32 is extruded between the inner circumferential surface of the conductive arm and the outer circumferential surface of the extrusion plug 41. Thereby completing the assembly of the female contact.

Fig. 13 is a view showing the removal of the female contact by a handling tool. As shown in fig. 13, the handling tool is configured such that the positions of the push plate 82 and the top plate 81 are reversed compared to those in fig. 12, the engaging device 6 is still engaged with the enlarged diameter section 24 of the conductive arm and fixedly connected to the top plate 81, and the other connection relationship is the same as that in fig. 12, whereby, when the jack 9 is actuated, the center screw 73 is pulled out from the conductive arm or the enlarged diameter section 24 by the push plate 82, and thereby the female contact is disassembled.

In order to clearly describe the engagement between the handling tool and the differently modified female contacts, the following description will be made with reference to fig. 14 of a contact handling tool according to the invention and of the operation of assembling and disassembling a first variant of a female contact according to a second embodiment of the invention using this handling tool, i.e. by way of example of the variant described in fig. 8.

By varying the means of engagement of the handling tool with the contact, as shown in fig. 14, the handling tool can be used with a female contact such as that shown in fig. 8. In this case, the contact engagement means 61 includes the

anchor ears

61A and 61B, the

anchor ears

61A and 61B are provided in a semi-cylindrical shape, the through-hole seats 611 are respectively projected on both side surfaces of the

anchor ears

61A and 61B, the seats 611 on both sides of each anchor ear are arranged to intersect with each other or are symmetrically arranged, and two such

semi-anchor ears

61A and 61B are engaged with each other. A semi-annular flange 612 extending radially inwardly is formed on the inner surface of the two anchor ears, and when the two

anchor ears

61A and 61B are fitted together and snap-fitted to the front ends of the conductive arms, the two semi-annular flanges 612 are split into an annular shape and fitted into the grooves 221 of the conductive arms, thereby engaging a handling tool with the contacts, and the rest of the handling tool, including the assembly and disassembly operations, are similar to those of fig. 13 and will not be described herein.

Next, an operation of assembling and disassembling the male contact 2 shown in fig. 9 using the handling tool according to the present invention will be described with reference to fig. 15 and 16.

The conventional method for assembling and disassembling the male contact adopts a knocking method, for example, a cylindrical object (the material hardness is preferably lower than that of the male contact) is padded at the front end of the male contact during assembling, the cylindrical object is knocked backwards by a hammer, during disassembling, a long rod-shaped object is used for propping against the rear end of the conductive bridging conical section through a hole at the other end of the conductive arm, and the hammer is used for knocking the rear end of the conical section of the male contact through the rod-shaped object, so that the male contact is withdrawn, but the mode needs manual labor and knocking, and the equipment can be damaged. And this approach is only suitable for male contacts that carry a relatively small current.

In order to ensure the quality of the assembly of the male contact, the male contact is pressed into the conductive arm by means of the handling tool according to the invention in order to achieve a tight and reliable connection of the male contact with the conductive arm. As shown in fig. 15, the handling tool includes a contact engaging device, which includes two half-arc-shaped hoops 61, the inner walls of the two half-arc-shaped

hoops

61A and 61B are provided with a clamping platform 612, two sides of the half-arc-shaped

hoops

61A and 61B are respectively provided with two through-hole pedestals 611, and the two half-arc-shaped hoops are buckled with each other, clamped in the conductive arm clamping groove 207 by the clamping platform 612 and fixed together by the

screws

7A and 7B. The combined anchor ear is connected with the top plate 81 through the

support rods

7A and 7B and is fixed through a nut.

As shown in fig. 15, a contact body holder 51 is further provided to connect the central screw 73 of the handling tool with the contact body. The contact body clamp comprises, for example, two semi-cylindrical gripping sleeves 51 which are fastened with each other, the two semi-cylindrical gripping sleeves are long and short in the axial direction, a semi-circular rear end plate is arranged at the front end of the two semi-circular gripping sleeves, a semi-circular notch is arranged at the center of the semi-circular rear end plate, circular

front end plates

510A and 510B are arranged at the front end of the semi-circular gripping sleeves, a through hole is arranged in the axial direction of the front end plate 510A of the long semi-circular gripping sleeve 51A, a screw hole is arranged in the axial direction of the front end plate 510B of the short semi-circular gripping sleeve 51B, the two

gripping sleeves

51A and 51B are fastened together to form a hollow cylindrical gripping sleeve 51, notches (towards the right end) in the

rear end plates

510C and 510D are spliced into a circular hole, the

front end surfaces

510A and 510B are superposed one on the other, a central bolt passes through the through hole of the front end plate 510A and is screwed with the screw hole of the front end, threadably engages the center bolt 73. As shown in fig. 15, the two

grippers

51A, 51B enclose and snap-fit the male contact area 201 therein, the grippers are connected and fastened together with the push plate 82 from the front end by the center bolt 73, so that the male contact 202 is enclosed in the two

semicircular grippers

51A, 51B, and when assembled, the side screws 7A, 7B connect the anchor ear 61 with the top plate 81, and the center screw 73 passes through the top plate 81, the jack 9, the screw-in push plate 82, and the front end plate 510B of the screw-in gripper 51B from the front to the rear in this order. When the jack is pressed, the jack pushes 82 the push, the grip sleeve 51 and the contact body 2, pressing the male contact body into the conductive arm 205, since the top plate 81 remains relatively stationary.

During disassembly, the positions of the push plate 82 and the top plate 81 need to be exchanged, and a suitable gap is left between the top plate 81 and the grip sleeve, so that when the jack 9 presses the push plate 82 backwards (away from the conductive arm), the grip sleeve 51 is pulled, and the contact body is pulled through the grip sleeve 51, and the contact body is pulled out of the conductive arm.

Although the above describes the embodiment in which the contact body of the male contact is gripped by the grip sleeve, thereby achieving the assembly and disassembly of the male contact, the present invention is not limited thereto, and in fact, the grip sleeve may be omitted.

Fig. 16 shows a variant of the male contact handling tool according to the invention.

In the assembly, as shown in fig. 16 and the disassembly operation is similar to that shown in fig. 15, the rear face of the push plate 82 is pressed against the front end of the male contact, the jack 9 is driven, and the male contact 201 is pressed against by the push plate 82, so that the male contact connection region 203 is forcibly pressed into the conductive arm taper hole 206. When detaching, the center bolt 73 is connected to the male contact main body by the front end bolt 703, and the jack 9 is driven to pull out the male contact from the conductive arm 205. Figure 17 shows a simplified female contact configuration by which the use of a special tool for carrying is eliminated and the field assembly and disassembly of the contact is simplified.

As shown in fig. 17, the female contact 1 is provided with an inner plug 47 at the inner side of the conductive arm 23 and at a position away from the contact area with the contact finger 32, the inner plug 47 may be in a cap shape, and the front end surface of the inner plug 47 is provided with a screw hole in the axial direction, and the inner plug 47 is further provided with a through hole in the lateral direction of the side wall. The conductive arm 23 is provided with a through hole 231 across the diameter at a corresponding position, so that the inner plug 47 is fixed inside the conductive arm by the through pin 48. The squeeze plug 43 is axially formed as a through hole, and the squeeze plug 43 is fixedly coupled to the front end of the conductive arm 23 by a bolt 49 passing through the through hole of the squeeze plug 43 and engaging with the screw hole of the inner plug 47. By tightening the screw 49, the pressing plug 43 is pressed so that the contact finger 32 is pressed against the contact surface 232 in the conductive arm 23, thereby achieving electrical connection.

This also allows the fingers 32 to be pressed against the contact areas 232 in the arms to make electrical contact with the arms, but the female contact of this configuration still requires manual hammering during removal, and has a limited contact pressure, which is suitable for female contacts with lower current carrying capacity. In addition, similarly, the connecting structure of the inner plug can also be applied to one side of the male contact, so that the aim of simplifying the assembly can be achieved, a special tool is not needed, and the connecting structure has the defects of limited conductive contact pressure and more labor-consuming disassembly and is suitable for a low-current isolating switch.

Thus, according to the present invention, a number of technical solutions are provided, including but not limited to:

1. a handling tool for a female contact including a conductive arm, a contact finger arranged around an outer peripheral surface of a leading end of the conductive arm, and a tapered sleeve pressing the contact finger against the outer peripheral surface of the conductive arm, the handling tool comprising:

a coupling device connecting the tapered sleeves;

a positioning bush that determines a position of the contact finger on an outer peripheral surface of a front end of the conductive arm; and

and a driver for driving the engaging device and further driving the tapered sleeve to an assembling position where the contact finger is pressed against the outer peripheral surface of the leading end of the conductive arm or to a disassembling position from the assembling position.

2. The tool for handling a female contact according to claim 1, wherein the positioning bush has a plurality of grooves arranged in a circumferential direction, and the contact fingers are respectively inserted into the grooves when the female contact is assembled.

3. The handling tool according to claim 2, wherein the positioning bushing comprises an enlarged diameter section with an enlarged diameter at the front end, and the recess extends to the enlarged diameter section.

4. The handling tool for the female contact according to any one of the above technical solutions further includes a push plate, a top plate, and a center bolt, wherein the push plate is fixed to the center bolt, the top plate is connected to the coupling device, and the driver is disposed between the push plate and the top plate through the center bolt.

5. The tool for attaching and detaching a female contact according to any one of the above aspects, wherein the top plate is connected to the joining device via a support rod.

6. In the tool for handling a female contact according to any of the above aspects, the central screw penetrates through the top plate, the driver, the push plate and the positioning bushing to align the top plate, the driver, the push plate and the positioning bushing in a longitudinal axis direction.

7. In the tool for attaching and detaching a female contact according to any one of the above aspects, the center screw is screwed to the push plate, and the top plate and the positioning bush are slidable with respect to the center screw.

8. The handling tool for a female contact according to any of the preceding claims, wherein the actuator is a jack.

9. In the assembling and disassembling tool for the female contact according to any one of the above technical solutions, when the female contact is assembled, the central screw abuts against the front end of the conductive arm through the baffle, the push plate is disposed at one end of the conductive arm and the jack, the top plate is disposed at the other end of the jack, and the top plate is pushed by the driving force of the jack in a direction away from the conductive arm.

10. The tool for attaching and detaching a female contact according to any one of the above aspects, wherein, when detaching the female contact, one end of the central screw is connected to a fixing plug provided in a front end of the conductive arm, the top plate is provided between the conductive arm and the jack, and the push plate is provided at the other end of the jack, so that the top plate is pushed toward the conductive arm by a driving force of the jack.

11. The tool for assembling and disassembling the female contact according to any one of the above technical solutions, wherein the engagement device includes two semi-cylindrical hoops, and the front ends and the rear ends of the two hoops are provided with flanges protruding radially inward to be buckled on the taper sleeve.

12. In the assembling and disassembling tool for the female contact according to any one of the above technical solutions, the two semi-cylindrical hoops are respectively provided with pedestals with through holes extending from the outer peripheral surfaces, and when the two hoops are fastened together, the pedestals on one hoop and the corresponding pedestals on the other hoop are aligned and overlapped with each other, and the supporting rod passes through the through holes on the pedestals to fix the two hoops in a state of being fastened on the tapered sleeves.

13. A female contact mounted and dismounted by using the handling tool according to any one of claims 1 to 12, comprising a conductive arm, wherein a conductive contact surface, a plurality of round bar-shaped contact fingers surrounding the conductive arm and contacting with the conductive contact surface of the conductive arm, and a tapered sleeve sleeved outside the contact fingers and pressing the contact fingers on the front end of the conductive arm are formed on the outer peripheral surface of the front end of the conductive arm, and the inner wall of the tapered sleeve is a tapered surface expanding forward.

14. The female contact according to any of the preceding claims, wherein the female contact further comprises a fixing plug fixed inside the front end of the conductive arm.

15. The female contact according to any one of the preceding claims, wherein a groove is formed in the inner wall of the front end of the conductive arm, and a spring collar is arranged in the groove to fix the position of the fixing plug.

16. The female contact according to any of the preceding claims, wherein the front end of the fixing plug is formed with a chamfered chamfer, which abuts against the spring collar when the fixing plug is pulled outwards.

17. The female contact according to any one of the preceding claims, wherein the plug has a threaded hole formed in the center of the front end face thereof.

18. In the female contact according to any one of the above aspects, the contact finger has a round bar shape, a groove is formed in a rear portion of the contact finger, and the conductive contact portion of the conductive arm has a tapered shape that tends to expand from the rear to the front.

19. The female contact according to any one of the above technical solutions, wherein a conductive contact surface of the front end of the conductive arm is a cylindrical surface, and an inclined surface is formed at a portion of the conductive contact surface of the contact finger to be in contact with the conductive arm.

20. The female contact according to any one of the above technical solutions, wherein the conductive contact surface at the front end of the conductive arm is a cylindrical surface, and an inclined surface or an inclined arc surface is formed on the outer side (the side away from the conductive contact surface) of the contact finger.

21. The female contact according to any one of the above technical solutions, wherein a positioning convex edge or a groove is formed at a rear edge of the conductive contact surface of the conductive arm, a positioning groove or a convex edge is formed at a surface of the contact finger where the rear end is joined to the conductive contact surface, and when the contact finger is contacted to the conductive contact surface of the conductive arm, the positioning convex edge or the groove of the conductive arm is joined to the positioning groove or the convex edge of the contact finger.

22. A female contact attaching and detaching tool including a conductive arm, a contact finger arranged around an inner peripheral surface of a front end of the conductive arm, and a pressing plug pressing the contact finger against the inner peripheral surface of the conductive arm, the attaching and detaching tool comprising:

a joining device connecting the conductive arms;

a positioning bush that determines a position of the contact finger on an inner peripheral surface of a front end of the conductive arm;

a center rod connected to the squeeze plug; and

and a driver for driving the central screw and further driving the pressing sleeve to an assembling position for pressing the contact finger on the inner peripheral surface of the front end of the conductive arm or driving the pressing plug from the assembling position to a disassembling position.

23. The loading and unloading tool according to any one of the preceding claims, wherein the positioning bush comprises grooves formed on an outer circumferential surface, into which the contact fingers are respectively fitted when assembled.

24. The positioning bush according to any of the above solutions is radially expanded at the front end, and the groove extends to the radially expanded section.

25. The handling tool according to any of the above aspects, wherein the front end of the conductive arm includes an enlarged diameter section having an enlarged diameter, and the engagement device includes two anchor ears engaged with the enlarged diameter section.

26. The handling tool according to any of the above aspects, wherein each of the anchor ears has a semi-cylindrical shape, and flanges protruding radially inward are formed at the front end and the rear end in the longitudinal direction to be engaged with the enlarged diameter section.

27. In the assembling and disassembling tool according to any of the above technical solutions, the outer peripheral surface of the front end of the conductive arm is formed with a positioning groove or a positioning protrusion, and the engaging device includes two anchor ears that are fastened to the positioning groove or the positioning protrusion.

28. The handling tool according to any of the above technical solutions, wherein each of the hoops is a semi-cylindrical shape, and an inner circumferential surface of each of the semi-cylindrical shapes forms a protrusion protruding inward in a radial direction or a groove recessed in a radial direction, and when the hoop is fastened to the conductive arm, the protrusion or the groove of the hoop is engaged with the positioning groove or the positioning protrusion of the conductive arm.

29. The handling tool of any of the above claims, wherein the actuator is a jack.

30. The handling tool according to any one of the preceding claims, wherein the handling tool further comprises a top plate and a support rod connecting the top plate to the coupling device, wherein one end of the jack abuts against the top plate, and the handling tool further comprises a push plate fixedly coupled to the central rod and abutting against the other end of the jack to be driven by the jack.

31. In the loading and unloading tool according to any one of the above claims, the center rod is a center screw, and the center screw is engaged in a threaded hole formed at a front end of the squeeze plug.

32. A female contact to be assembled and disassembled by the handling tool according to any one of claims 22 to 31, comprising a conductive arm forming a conductive contact surface on an inner peripheral surface of a front end thereof; a plurality of round bar-shaped contact fingers surrounding and in contact with the conductive contact surface of the conductive arm; and a squeeze plug squeezing the contact finger onto the conductive contact surface.

33. The female contact according to claim 32, wherein the conductive arm has a diameter-expanded section formed at a front end thereof, and the conductive contact surface is formed on an inner peripheral surface of the diameter-expanded section.

34. The female contact according to claim 33, wherein the conductive contact surface formed on the inner periphery of the front end of the conductive arm is tapered so as to increase gradually from the rear to the front, and the outer periphery of the press plug is tapered so as to increase gradually from the rear to the front and matches the taper angle of the conductive contact surface of the conductive arm.

35. The female contact according to claim 33, wherein the conductive contact surface formed on the inner periphery of the front end of the conductive arm is a cylindrical hole with an equal diameter, a raised boss is formed at the rear end of the hole, the outer periphery of the extrusion plug is tapered from back to front, an inclined surface (or an arc surface) is formed on the inner side of the contact finger and is matched with the taper angle of the extrusion plug, and a groove matched with the boss at the rear of the conductive contact surface is formed on the outer side of the contact finger.

36. The female contact according to any one of the above aspects, wherein the conductive arm has a positioning groove or a positioning protrusion formed on an outer circumferential surface thereof around the conductive arm.

37. The female contact according to any one of the preceding claims, wherein a threaded hole is formed in the center of the front end surface of the press plug.

38. The female contact according to any one of the preceding claims, wherein an internal plug is arranged inside the conductive arm at a position rearward from the contact area of the contact fingers in the direction of the longitudinal axis, and the press plug is axially provided with a through hole through which a bolt is passed to engage with the threaded hole of the internal plug.

39. A male contact for mating with the female contact of any one of claims 13-21 or 32-39, comprising:

a conductive arm; and

a male contact body disposed at a front end of the conductive arm,

the male contact main body comprises a pie-shaped conductive joint area, a cylindrical supporting area and a conical conductive connection area, the diameter of the conductive joint area is smaller than that of the joint area, a conical hole is formed in the front end of the conductive arm, and the conical connection area of the male contact main body is matched into the conical hole.

40. The male contact of claim 39, wherein the conductive arm is made of aluminum or an aluminum alloy material.

41. The male contact of claim 39 or 40, wherein the front face of the male contact body centrally defines a threaded bore.

42. The male contact according to any of the preceding claims, wherein an internal plug is arranged inside the conductive arm in the direction of the longitudinal axis, and the male contact is axially arranged as a through hole through which a bolt is passed to engage with the threaded hole of the internal plug.

43. A handling tool for assembling and disassembling a male contact according to any of claims 39-42, comprising:

a conductive arm engaging means for engaging the conductive arm;

a contact engagement device associated with the contact body of the male contact; and

a driver for driving the contact engagement device.

44. The removal tool for a male contact of claim 43, wherein: the outer peripheral surface of the conductive arm at one side of the male contact is provided with a positioning groove or a positioning protrusion, the conductive arm joint device comprises two hoops, each hoop is in a semi-cylinder shape, and the inner peripheral surface of each hoop is provided with a protruding flange or a sunken groove so as to be matched with the positioning groove or the positioning protrusion of the conductive arm.

45. The disassembling tool for the male contact according to claim 43 or 44, wherein the two semi-cylindrical hoops are respectively provided with a pedestal with a through hole extending from the outer peripheral surface, and when the two hoops are fastened to each other, the pedestal on one hoop and the corresponding pedestal on the other hoop are overlapped in alignment with each other.

46. The disassembling tool for the male contact according to any one of the above technical solutions further includes a top plate connected to the conductive arm engaging device through a support rod, and the support rod is connected to the pedestal.

47. The removal tool for a male contact according to any one of the preceding claims, wherein the actuator is a jack.

48. The disassembling tool for the male contact according to any one of the above technical solutions, further comprising a center rod and a push plate, wherein the center rod passes through the top plate, the jack and is connected to the push plate, and one end of the center screw is connected to the male contact engaging device.

49. A removal tool for a male contact according to any one of the preceding claims, wherein the male contact engagement means comprise: the different cover of grabbing of two semicylindrical and longitudinal length, every grab the cover (be close to electrically conductive arm) rear end and be provided with semi-circular rear end plate, the centre of a circle department of this semi-circular rear end plate is provided with the semicircle notch, grab the cover at semi-circular (deviate from electrically conductive arm) front end and be provided with the circular shape front end plate, the front end plate axial of long grabbing the cover is equipped with the through-hole, and the front end plate axial of short grabbing the cover is equipped with the screw, two semi-circular grab the cover before the front end plate around the coincide mode relatively the lock be in the same place, detain the male contact.

50. A removal tool for a male contact according to any one of the preceding claims, wherein a threaded hole is provided in the centre of the front end face of the male contact, and the engagement means is a threaded rod axially connected to the central rod, which is screwed into the threaded hole in the front end of the male contact.

51. A break assembly comprising a female contact as claimed in any one of the preceding claims and a male contact as claimed in any one of the preceding claims.

The present invention has been described in detail above by way of a plurality of embodiments, but it is to be understood that the present invention is not limited to the embodiments disclosed in the above description, but other structures may be conceived by those skilled in the art to achieve the object of the present invention based on the teaching of these embodiments. For example, the contact engaging means need not be in the form of a hoop, but may take the form of various types of connections, as long as the handling tool can be connected to the contact. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the scope of the invention be limited only by the appended claims and equivalents thereof.

Claims

1. A female contact comprising a conductive arm having a circular tube shape and including a conductive contact surface on an outer or inner peripheral surface of a front end thereof, a plurality of fingers in contact with the conductive contact surface of the conductive arm, and an extrusion member for extruding the fingers onto the conductive contact surface of the conductive arm, characterized in that a circumferential surface of the extrusion member in contact with the fingers is tapered in an axial direction of the conductive arm.

2. The female contact according to claim 1, wherein the conductive contact surface is provided on an outer peripheral surface of a front end of the conductive arm, the pressing member is a tapered sleeve, and an inner peripheral surface of the tapered sleeve is tapered.

3. The female contact according to claim 2, further comprising a fixed plug disposed inside the front end of the conductive arm.

4. The female contact according to claim 3, wherein the front end of the conductive arm is formed with a groove in which a spring collar is disposed to secure the position of the securing plug.

5. The female contact according to claim 4, wherein the front end of the securing plug is formed with a chamfered chamfer that abuts the spring collar when the securing plug is pulled outward.

6. The female contact according to claim 5, wherein the stationary plug has a hole formed in the center of the front end surface thereof.

7. The female contact according to any one of claims 2 to 6, wherein the conductive contact surface of the conductive arm is formed as an inclined surface having a gradually enlarged diameter.

8. The female contact according to claim 7, wherein a positioning ridge or groove is formed on the rear side of the conductive contact surface of said conductive arm, and said contact finger forms a positioning groove or ridge on the rear side of said inclined surface, said positioning ridge or groove of said conductive arm engaging said positioning groove or ridge of said contact finger when said inclined surface of said contact finger is in contact with said conductive contact surface of said conductive arm.

9. The female contact according to any one of claims 2 to 6, wherein the conductive contact surface of the conductive arm is a cylindrical surface, and a portion of the contact finger to be in contact with the conductive contact surface of the conductive arm is formed as an inclined surface.

10. The female contact according to claim 9, wherein a positioning ridge or groove is formed on a rear side of the conductive contact surface of said conductive arm, and said contact finger forms a positioning groove or ridge on a rear side of said inclined surface, said positioning ridge or groove of said conductive arm engaging said positioning groove or ridge of said contact finger when said inclined surface of said contact finger is in contact with said conductive contact surface of said conductive arm.

11. The female contact according to any one of claims 2 to 6, wherein the conductive contact surface of the conductive arm is a cylindrical surface, the finger comprises a contact portion that contacts the conductive contact surface of the conductive arm and an outer portion opposite to the contact portion, the outer portion being formed as an inclined surface.

12. The female contact according to claim 11, wherein a positioning ridge or groove is formed on a rear side of the conductive contact surface of said conductive arm, and said contact finger forms a positioning groove or ridge on a rear side of said inclined surface, said positioning ridge or groove of said conductive arm engaging said positioning groove or ridge of said contact finger when said inclined surface of said contact finger is in contact with said conductive contact surface of said conductive arm.

13. The female contact according to claim 1, wherein the conductive contact surface is provided on an inner peripheral surface of a front end of the conductive arm, the pressing member is a pressing plug, and an outer peripheral surface of the pressing plug is tapered.

14. The female contact according to claim 13, wherein the front end of the conductive arm includes an enlarged diameter section having an enlarged diameter, and the conductive contact surface is provided on an inner peripheral surface of the enlarged diameter section.

15. The female contact according to claim 13 or 14, wherein the conductive contact surface is formed as a tapered surface that gradually expands toward the front end of the conductive arm, and the outer periphery of the dummy plug is tapered gradually increases toward the front end.

16. Female contact according to claim 13 or 14, characterized in that the contact finger comprises an electrically conductive contact area which is in contact with an electrically conductive contact surface of the electrically conductive arm, the electrically conductive contact area being formed as an inclined surface.

17. The female contact according to claim 16, wherein the contact finger forms a positioning recess at a side opposite to the conductive contact area, and a positioning projection is provided in an inner peripheral surface of the conductive arm at a rear side of the conductive contact area, the positioning projection being fitted into the positioning recess of the contact finger when assembled.

18. The female contact according to claim 17, wherein the outer peripheral surface of the dummy plug is tapered such that the diameter of the dummy plug gradually decreases from the rear to the front.

19. The female contact according to claim 13, 14 or 18, wherein the forward face of the plunger is formed with an axial bore.

20. The female contact according to claim 13, wherein an inner plug is provided inside the conductive arm at a position rearward from the conductive contact area of the contact finger in the direction of the longitudinal axis, the pressing plug is axially provided with a through hole, and a bolt for tightening the pressing plug is passed through the through hole of the pressing plug to be engaged with the threaded hole of the inner plug.