CN112701506B - Crimping terminal, structure, method, pre-pressing joint sleeve model and mounting method of elbow type joint - Google Patents

Abstract

The invention provides a crimping terminal, a structure, a method, a pre-pressing sleeve pipe model and an installation method of an elbow type joint. By the crimping method, the installation process of the elbow type connector can be simulated in advance, the sleeve section of the crimping terminal is sleeved on the cable core, and the constant-force threaded connecting piece is pre-matched with the threaded hole. If observe the terminal surface of second surface and nut if nonparallel, then can loosen constant force threaded connection spare to the angle of adjustment crimping terminal, thereby can make the terminal surface of second surface and nut parallel, then tighten the nut again, thereby can ensure that the terminal surface of nut is parallel with the second surface and the laminating. Therefore, when actually installing the elbow type joint, the end face of the nut can be ensured to be parallel to and attached to the second surface, and further, after the elbow type joint is installed, the second surface of the crimping terminal has a large contact area with the nut, so that the elbow type joint has small contact resistance, is not easy to generate heat, can reduce potential safety hazards, and is safer and more reliable.

Description

Crimping terminal, structure, method, pre-press joint sleeve mold and method for mounting elbow joint

Technical Field

The invention relates to the technical field of cable conductor connection, in particular to a crimping terminal, a structure and a method thereof, a prepressing connection sleeve mold and an installation method of an elbow type joint.

Background

Outdoor distribution transformer, American case becomes, looped netowrk cabinet, cable branch box, buried transformer and other electrical equipment etc. all need to connect with elbow type cable joint head. The existing operation method is that the crimping terminal is inserted into the elbow-shaped insulating sleeve after being crimped with the cable core, and then the crimping terminal is locked by a bolt, so that the direction is difficult to adjust after the crimping terminal is crimped with the cable core because the exposed part of the cable in the cabinet is not too long and the inside of the elbow-shaped insulating sleeve has little adjusting space. Under most circumstances, when using the bolt to lock crimping terminal, can form an contained angle between crimping terminal's surface and the bolt plane, cause the two area of contact not big enough to, when cable run heavy load operation, elbow type cable joint department causes generating heat because of hindering greatly, burns elbow type cable joint head when serious, causes the electric power incident.

Disclosure of Invention

Therefore, it is necessary to provide a crimping terminal, a structure, a method, a pre-pressing sleeve mold and a method for installing an elbow type joint, which can reduce potential safety hazards, in order to solve the problem of safety accidents caused by large resistance at the conventional elbow type cable connection joint.

The embodiment of the application provides a crimping terminal for with the crimping of cable core, include:

the sleeve comprises a sleeve section, wherein one end of the sleeve section is provided with an opening, and the side wall of the sleeve section is provided with a threaded hole;

the connecting section is fixedly connected with the other end of the sleeve section, the connecting section is provided with a first surface and a second surface which are arranged in a reverse manner, and the connecting section is provided with a through hole which penetrates through the first surface and the second surface; and

and the constant-force threaded connector is used for being matched with the threaded hole and used for crimping the cable core and the sleeve section.

In one embodiment, the threaded holes correspond to the constant force threaded connectors one to one;

the threaded holes at least comprise a first threaded hole and a second threaded hole, and the first threaded hole and the second threaded hole are arranged at intervals along the circumferential direction of the sleeve section.

In one embodiment, one end of the constant-force threaded connecting piece is a concave arc surface, and the concave arc surface is used for being matched with the outer peripheral surface of the cable core.

Still another embodiment of the present application provides a crimping terminal and a crimping structure of a cable core, including the cable core and the crimping terminal described in any one of the above,

the sleeve section is sleeved on the cable core;

the constant force threaded connector is matched with the threaded hole and is abutted to the cable core.

In one embodiment, the surface of the constant-force threaded connector facing away from the end of the cable core and the outer circumferential surface of the sleeve section are located on the same circumferential surface.

Another embodiment of the present application further provides a pre-press connection sleeve model, including a pre-press connection sleeve; the pre-crimping sleeve is provided with a hole cavity, the hole cavity is provided with a side wall and a bottom wall, one end of the pre-crimping sleeve is provided with an inlet, the side wall of the hole cavity is provided with a socket, and the inlet and the socket are respectively communicated with the hole cavity;

when the connecting section of the crimp terminal according to any one of the above embodiments is inserted into the insertion opening, the first surface of the connecting section can be fitted to the bottom wall.

Still another embodiment of the present application provides a crimping method of the crimping structure described in any one of the above, including the steps of:

sleeving a sleeve section of the crimping terminal on the cable core, and pre-matching the constant-force threaded connecting piece with the threaded hole;

providing the pre-crimping sleeve, inserting the connecting section of the crimping terminal into the pre-crimping sleeve from the socket, and attaching the first surface to the bottom wall of the hole cavity;

providing a fixing screw rod and a nut matched with the fixing screw rod, inserting the fixing screw rod into the pre-pressing connecting sleeve from the inlet and penetrating into the through hole of the connecting section, and abutting the fixing screw rod against the bottom wall of the hole cavity;

observing whether the second surface is parallel to the end surface of the nut, if not, loosening the constant-force threaded connecting piece, adjusting the angle of the crimping terminal so that the second surface is parallel to the end surface of the nut, and then screwing the nut so that the end surface of the nut is parallel to and attached to the second surface;

screwing the constant-force threaded connecting piece until the constant-force threaded connecting piece is broken;

and respectively detaching the pre-crimping sleeve, the nut and the fixing screw rod from the crimping terminal.

By the above crimping method, the process of installing the elbow type joint can be simulated in advance. When the installation process of the elbow type joint is simulated, the sleeve section of the crimping terminal is sleeved on the cable core, and the constant-force threaded connecting piece is pre-matched with the threaded hole. If observe the terminal surface of second surface and nut if nonparallel, then can loosen constant force threaded connection spare to the angle of adjustment crimping terminal, thereby can make the terminal surface of second surface and nut parallel, then tighten the nut again, thereby can ensure that the terminal surface of nut is parallel with the second surface and the laminating. Therefore, when actually installing the elbow type joint, the crimping terminal is inserted into the elbow insulating sleeve, and then the crimping terminal and the elbow insulating sleeve are locked through the fixing screw rod and the nut, so that the end face of the nut and the second surface can be ensured to be parallel and attached, and further, after the elbow type joint is installed, the second surface of the crimping terminal and the nut have a large contact area, the contact impedance at the elbow type joint is small, heat is not easily generated, potential safety hazards can be reduced, and the elbow type joint is safe and reliable.

In one embodiment, after the step of observing whether the second surface is parallel to the end surface of the nut, and if not, loosening the constant-force threaded connector, adjusting the angle of the crimp terminal so that the second surface is parallel to the end surface of the nut, and then tightening the nut so that the end surface of the nut is parallel to and conforms to the second surface, the crimping method further includes the steps of:

and loosening the nut and the constant-force threaded connecting piece, repeating the observation of whether the second surface is parallel to the end surface of the nut, loosening the constant-force threaded connecting piece if the second surface is not parallel to the end surface of the nut, adjusting the angle of the crimping terminal so that the second surface is parallel to the end surface of the nut, and screwing the nut so that the end surface of the nut is parallel to and attached to the second surface.

In one embodiment, after the step of tightening the constant force threaded connection until the constant force threaded connection breaks, the crimping method further comprises the steps of:

and grinding and polishing the fracture surface of the constant-force threaded connecting piece so that the fracture surface and the outer peripheral surface of the sleeve section are in smooth transition.

Yet another embodiment of the present application further provides a method for installing an elbow connector, including the steps of:

providing an elbow-shaped insulating sleeve, wherein the elbow-shaped insulating sleeve comprises a first sleeve and a second sleeve which is fixedly connected with the first sleeve and arranged at an angle, and the first sleeve is communicated with the second sleeve;

providing a fixing screw and a nut matched with the fixing screw;

inserting a crimping terminal of a crimping structure manufactured by the crimping method into the first sleeve, and enabling the connecting section to extend into a joint of the first sleeve and the second sleeve, wherein a first surface of the connecting section is attached to an inner wall of the joint of the first sleeve and the second sleeve;

inserting the fixing screw into the second sleeve and penetrating into a through hole of a connecting section of the crimping terminal, and abutting the fixing screw against the inner wall of the connecting part of the first sleeve and the second sleeve;

and when the second surface is confirmed to be parallel to the end surface of the nut, the nut is screwed so that the end surface of the nut is parallel to and attached to the second surface.

Drawings

Fig. 1 is a schematic structural view of a crimp terminal according to an embodiment;

fig. 2 is a front view of the crimp terminal in fig. 1;

fig. 3 is a left side view of the crimp terminal in fig. 1;

FIG. 4 is a schematic view of a crimp terminal, a cable core and a pre-crimped ferrule of an embodiment during pre-crimping;

FIG. 5 is an exploded view of the structure of FIG. 4;

FIG. 6 is a flow chart of a crimping method of the crimping structure of another embodiment;

fig. 7 is a flow chart of a method of installing an elbow fitting according to yet another embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3, an embodiment of the present application provides a crimp terminal 100. The crimp terminal 100 includes a sleeve section 110, a connection section 120, and a constant force threaded connection (not shown). An opening 101 is provided at one end of the sleeve segment 110, and a threaded hole 102 is provided in the sidewall of the sleeve segment 110. The connecting section 120 is fixedly connected to the other end of the sleeve section 110, and the connecting section 120 has a first surface 121 and a second surface 122 which are opposite to each other. The connecting segment 120 is provided with a through hole 103 penetrating the first surface 121 and the second surface 122. A constant force threaded connector is used to mate with threaded bore 102 and to crimp cable core 200 to sleeve section 110.

Specifically, referring to fig. 4 and 5, the crimp terminal 100 is used for crimping with the cable core 200. The sleeve section 110 is configured as a sleeve, and the cable core 200 can be inserted into the sleeve section 110 from the one end opening 101 of the sleeve section 110 and crimped with the sleeve section 110. The connection section 120 and the other end of the sleeve section 110 may be fixedly connected by means of integral molding.

The constant force threaded connector is, for example, a constant force bolt or a constant force screw.

In contrast to the prior art crimp terminal, the side wall of the sleeve section 110 of the crimp terminal 100 of the present application is provided with a threaded hole 102. By matching the constant-force threaded connector with the threaded hole 102 and screwing the constant-force threaded connector, the constant-force threaded connector can extrude the cable core 200, so that the cable core 200 and the crimping terminal 100 can be crimped together. The cable core 200 and the crimping terminal 100 can be crimped together by screwing the constant-force threaded connector, and the operation is convenient.

In one embodiment, the material used for the body of the crimp terminal 100 is copper, such that the sleeve section 110 forms a copper sleeve and the connection section 120 forms a connection section made of copper. The crimp terminal 100 also has a tin plating on the outer surface thereof, so that the outer surfaces of the sleeve section 110 and the connection section 120 each have a tin plating. By providing the tin plating layer, the oxidation resistance and corrosion resistance of the crimp terminal 100 can be improved.

In one embodiment, the inner wall of casing section 110 is uneven. For example, the inner wall of casing section 110 may be serrated. When the sleeve segment 110 and the cable core 200 are crimped together, the inner wall of the sleeve segment 110 is uneven, so that the friction force between the inner wall of the sleeve segment 110 and the cable core 200 can be enhanced, and the crimping effect is better.

Referring to fig. 1, in an embodiment, the threaded holes 102 include at least a first threaded hole 102a and a second threaded hole 102b, and the first threaded hole 102a and the second threaded hole 102b are spaced apart along a circumference of the sleeve segment 110. The threaded holes 102 correspond to the constant force threaded connectors one to one, that is, the first threaded hole 102a and the second threaded hole 102b correspond to different constant force threaded connectors, respectively.

Specifically, as shown in FIG. 1, in the present embodiment, the first and second threaded bores 102a and 102b are spaced apart along the circumference of the casing section 110, such that the constant force threaded connectors corresponding to the first threaded bores 102a and the constant force threaded connectors corresponding to the second threaded bores 102b are spaced apart along the circumference of the casing section 110. The constant-force threaded connecting pieces in two different directions are used for extruding the cable core 200, so that the contact surface between the cable core 200 and the inner wall of the sleeve section 110 is larger, the contact resistance can be reduced, and the potential safety hazard is reduced.

The angle between the central axis of the first threaded hole 102a and the central axis of the second threaded hole 102b may be in the range of 85 ° to 95 °, e.g., 85 °, 88 °, 90 °, 91 °, 95 °.

It will be appreciated that more threaded holes 102 may be axially disposed depending on the length of the sleeve segment 110.

In one embodiment, one end of the constant force threaded connector has a concave arc surface for fitting with the outer circumferential surface of the cable core 200.

Specifically, generally, the outer circumferential surface of the cable core 200 is a circumferential surface, or substantially a circumferential surface. The surface of one end through with constant force threaded connection spare and cable core 200 butt sets up to concave cambered surface, concave cambered surface and cable core 200's outer peripheral face adaptation to, when constant force threaded connection spare and cable core 200 butt, area of contact is bigger, and the suitability is better, and then is favorable to cable core 200 more reliably and sleeve section 110 crimping.

Referring to fig. 4 and 5, another embodiment of the present application further provides a crimping structure of the crimping terminal 100 and the cable core 200. The crimp structure includes a cable core 200 and a crimp terminal 100 as in any one of the above. The sleeve section 110 is sleeved on the cable core 200. The constant force threaded connector mates with the threaded bore 102 and abuts the cable core 200.

In the crimping structure, the constant-force threaded connector is matched with the threaded hole 102 and screwed tightly, so that the constant-force threaded connector extrudes the cable core 200, and the cable core 200 and the crimping terminal 100 can be crimped together.

In one embodiment, the surface of the constant force threaded connector facing away from the end of the cable core 200 is located on the same circumferential surface as the outer circumferential surface of the sleeve segment 110.

Specifically, as described above, the cable core 200 and the crimp terminal 100 can be crimped together by screwing the constant-force threaded connector, resulting in the above-described crimp structure.

It will be appreciated that the constant force threaded connection has a maximum torque value that it can withstand and the constant force threaded connection will break when the torque it is subjected to exceeds this maximum torque value. The position of the fracture surface of the constant-force threaded connection can then be determined from this maximum torque value.

The maximum torque value of the constant-force threaded connector can be calculated in advance according to the wall thickness of the sleeve section 110, the diameter of the cable core 200, the size and the material of the constant-force threaded connector and other factors, and the position of the fracture surface of the constant-force threaded connector can be determined in advance. Or the position of the fracture surface of the constant-force threaded connection corresponding to the maximum torque value can be determined through multiple tests.

When the cable core 200 and the crimping terminal 100 are crimped, the constant-force threaded connector can be screwed until the constant-force threaded connector is broken. As can be seen from the above, the position of the fracture surface of the constant force threaded connector can be determined in advance according to the maximum torque value, so that when the constant force threaded connector is screwed with the casing section 110, the fracture surface of the constant force threaded connector is just near the outer surface of the casing section 110. And then the fracture surface is ground and polished, so that the fracture surface of the constant-force threaded connecting piece and the outer peripheral surface of the sleeve section 110 can be in smooth transition, and the point discharge at the fracture part is avoided.

It can be understood that when the fracture surface of the constant-force threaded connector smoothly transitions with the outer circumferential surface of the sleeve section 110, the surface of the end of the constant-force threaded connector facing away from the cable core 200 and the outer circumferential surface of the sleeve section 110 are located on the same circumferential surface.

Of course, it is understood that in the present embodiment, the following cases are also included in the case that the surface of the end of the constant-force threaded connector facing away from the cable core 200 and the outer circumferential surface of the sleeve segment 110 are located on the same circumferential surface: the surface of the end of the constant force threaded connector facing away from the cable core 200 and the outer circumferential surface of the sleeve segment 110 are located on approximately the same circumferential surface, so that slight errors can be allowed, and the purpose of avoiding point discharge at the fracture surface can also be achieved.

Referring to fig. 4 and 5, another embodiment of the present application further provides a pre-press connection sleeve model. The pre-crimped sleeve model includes pre-crimped sleeve 300. Pre-crimped cannula 300 has a lumen 301. Referring to fig. 5, a bore 301 of the pre-crimping sleeve 300 has a side wall and a bottom wall 301a, an inlet 302 is disposed at one end of the pre-crimping sleeve 300, a socket 303 is disposed on the side wall of the bore 301, and the inlet 302 and the socket 303 are respectively communicated with the bore 301 of the pre-crimping sleeve 300. When the connecting section 120 of the crimp terminal 100 according to any one of the above-described embodiments is inserted into the socket 303, the first surface 121 of the connecting section 120 can be fitted to the bottom wall 301 a.

Specifically, when connecting section 120 is inserted into pre-crimp sleeve 300 from socket 303, first surface 121 of connecting section 120 can be conformed to bottom wall 301 a. As shown in fig. 5, the shape of bottom wall 301a of bore 301 is similar to the shape of first surface 121 of connecting segment 120, such that first surface 121 of connecting segment 120 mates with bottom wall 301a when connecting segment 120 is inserted into pre-crimp sleeve 300 from receptacle 303.

Referring to fig. 6, another embodiment of the present application provides a crimping method of the above-mentioned crimping structure. The method comprises the following steps:

s110: the sleeve section 110 of the crimp terminal 100 is sleeved over the cable core 200 and the constant force threaded connector is pre-mated with the threaded bore 102.

Specifically, when the sleeve section 110 of the crimp terminal 100 is sleeved into the cable core 200, the cable core 200 is kept in a natural vertical state, so that the cable core 200 is prevented from being in a twisted state or other states that can generate reaction force.

Pre-mating the constant force threaded connector with the threaded bore 102 means: the constant-force threaded connector is screwed into the threaded hole 102 in advance and is brought into contact with the cable core 200, so that the cable core 200 and the crimp terminal 100 can be held in a fixed relative position in advance. However, when the constant force threaded connector is pre-mated with the threaded bore 102, the constant force threaded connector is not unscrewed. Thus, the constant force threaded connection may also be removed from the casing section 110 after being pre-mated.

S120: providing the above-mentioned pre-crimp sleeve 300, inserting the connection section 120 of the crimp terminal 100 from the socket 303 into the pre-crimp sleeve 300, and attaching the first surface 121 to the bottom wall 301a of the bore 301 of the pre-crimp sleeve 300.

Specifically, when the connection segment 120 is inserted into the inside of the pre-crimping sleeve 300 from the socket 303, the first surface 121 of the connection segment 120 can be attached to the bottom wall 301a, so that the first surface 121 and the bottom wall 301a can be kept parallel and attached.

S130: a set screw (not shown) and a nut 400 that mates with the set screw are provided, the set screw is inserted into pre-crimp sleeve 300 from inlet 302 and through-hole 103 of connecting section 120, and the set screw abuts against bottom wall 301a of bore 301 of pre-crimp sleeve 300.

Specifically, referring to fig. 4 and 5, if the fixing screw is continuously inserted into pre-crimping sleeve 300 from inlet 302, the fixing screw can be inserted into through hole 103 of connecting segment 120 until passing through hole 103 and abutting against bottom wall 301a of bore 301 of pre-crimping sleeve 300. The nut 400 is then tightened so that the nut abuts the second surface 122 of the connecting section 120, thereby securing the crimp terminal 100 to the pre-crimp sleeve 300 and the set screw.

S140: observing whether the second surface 122 is parallel to the end surface of the nut 400, if not, loosening the constant force threaded connector, adjusting the angle of the crimp terminal 100 so that the second surface 122 is parallel to the end surface of the nut 400, and then tightening the nut 400 so that the end surface of the nut 400 is parallel to and attached to the second surface 122.

Specifically, before the nut 400 is tightened with the second surface 122, it is necessary to observe whether the second surface 122 is parallel to the end surface of the nut 400. If not parallel, the constant force threaded connector can be loosened, the crimp terminal 100 can be rotated relative to the cable core 200.

By rotating the crimp terminal 100 with respect to the cable core 200 to adjust the angle of the crimp terminal 100, the second surface 122 can be kept parallel to the end surface of the nut 400, and at this time, the nut 400 is screwed, so that the end surface of the nut 400 can be ensured to be parallel to and attached to the second surface 122.

S150: and screwing the constant-force threaded connecting piece until the constant-force threaded connecting piece is broken.

Specifically, after it is confirmed that the end surface of the nut 400 is parallel to and attached to the second surface 122, the constant-force threaded connector is screwed until the constant-force threaded connector is broken.

S160: the pre-crimp sleeve 300, the nut 400, and the fixing screw are removed from the crimp terminal 100, respectively.

After the constant force threaded connector is twisted off, the pre-crimping sleeve 300, the nut 400 and the fixing screw are respectively detached from the crimping terminal 100, so that a crimping structure of the crimping terminal 100 and the cable core 200 can be obtained.

By the above crimping method, the process of installing the elbow type joint can be simulated in advance. When the installation process of the elbow connector is simulated, the sleeve section 110 of the crimp terminal 100 is sleeved on the cable core 200, and the constant-force threaded connector is pre-matched with the threaded hole 102. When it is observed that the second surface 122 is not parallel to the end surface of the nut 400, the constant-force threaded connector may be loosened to adjust the angle of the crimp terminal 100, so that the second surface 122 may be parallel to the end surface of the nut 400, and then the nut 400 may be tightened, so that the end surface of the nut 400 may be ensured to be parallel to and fit with the second surface 122. Therefore, when actually installing the elbow type joint, the crimp terminal 100 is inserted into the elbow insulating sleeve, and then the crimp terminal 100 and the elbow insulating sleeve are locked by the fixing screw and the nut 400, so that the end surface of the nut 400 can be ensured to be parallel and attached to the second surface 122, and further, after the elbow type joint is installed, the second surface 122 of the crimp terminal 100 and the nut 400 have a large contact area, the contact impedance at the elbow type joint is small, heat is not easily generated, potential safety hazards can be reduced, and the elbow type joint is safer and more reliable.

It is to be understood that the pre-crimped sleeve 300 is a pre-crimped sleeve model, and when the crimp terminal 100 is inserted into the pre-crimped sleeve 300, the sleeve segment 110 is located outside the pre-crimped sleeve 300 and the constant force threaded connector is also located outside the pre-crimped sleeve 300, as compared to an actual elbow-shaped insulating sleeve. Therefore, if it is observed that the second surface 122 is not parallel to the end surface of the nut 400, it is convenient to loosen the constant force threaded connector outside the pre-press sleeve 300 and also to rotate the crimp terminal 100 for angle adjustment.

In an embodiment, after step S140, the crimping method further includes step S170: the nut 400 and the constant force threaded connector are loosened and step S140 is repeated.

Specifically, in step S140, if the cable core 200 fails to remain vertical or there is a reaction force, the cable core 200 easily brings the crimp terminal 100 into deflection.

In step S170, by loosening the nut 400 and then loosening the constant-force threaded connector, the crimp terminal 100 can be caused to release the cable core 200, so that the reaction force in the cable core 200 can be released. Then, the step S140 is repeated again, so that it can be ensured that after the crimp terminal 100 is crimped with the cable core 200, the cable core 200 can be maintained in a vertical state without a reaction force, and the second surface 122 of the connection section 120 of the crimp terminal 100 can be maintained in parallel and attached to the end surface of the nut 400.

In an embodiment, after step S150, the crimping method further includes step S180: the fracture surface of the constant force threaded connection is ground and polished so that the fracture surface smoothly transitions with the outer peripheral surface of the sleeve segment 110.

Specifically, the operation step S180 may be performed after the step S160, and the operation is convenient. As described above, the position of the fracture surface of the constant-force threaded connector can be determined in advance according to the maximum torque value, so that when the constant-force threaded connector is screwed with the casing segment 110, the fracture surface of the constant-force threaded connector is just near the outer surface of the casing segment 110, and then the fracture surface is ground and polished, so that the fracture surface of the constant-force threaded connector and the outer peripheral surface of the casing segment 110 can be in smooth transition, and the point discharge at the fracture can be avoided.

An embodiment of the present application further provides a method for installing an elbow joint, including the steps of:

s210: and providing an elbow-shaped insulating sleeve, wherein the elbow-shaped insulating sleeve comprises a first sleeve and a second sleeve which is fixedly connected with the first sleeve and arranged at an angle, and the first sleeve is communicated with the second sleeve.

In particular, the elbow-shaped insulating sleeve can be made of the prior art and is not described in detail herein.

S220: a set screw and a nut 400 cooperating with the set screw are provided.

Specifically, the fixing screw and nut 400 may employ the fixing screw and nut 400 in the above-described embodiment.

S230: the crimp terminal 100 of the crimp structure formed by the above-mentioned crimping method is inserted into the first sleeve, and the connecting section 120 is made to extend into the joint of the first sleeve and the second sleeve, and the first surface 121 of the connecting section 120 is attached to the inner wall of the joint of the first sleeve and the second sleeve.

S240: the fixing screw is inserted into the second sleeve and penetrates the through hole 103 of the connection section 120 of the crimp terminal 100, and is abutted with the inner wall of the joint of the first sleeve and the second sleeve.

S250: when it is confirmed that the second surface 122 is parallel to the end surface of the nut 400, the nut 400 is tightened so that the end surface of the nut 400 is parallel to and attached to the second surface 122.

In the method of mounting the elbow connector, when the elbow connector is mounted, the crimp terminal 100 having the crimp structure formed by the above-described crimping method is inserted into the first sleeve of the elbow insulating sleeve, and then inserted into the second sleeve of the elbow insulating sleeve by the fixing screw and the nut 400, and the crimp terminal 100 is locked. Since the crimping structure formed by the crimping method can simulate the mounting process of the elbow connector in advance and ensure that the end surface of the nut 400 is parallel to and attached to the second surface 122, when the elbow connector is actually mounted, the end surface of the nut 400 is parallel to and attached to the second surface 122, so that the contact area between the second surface 122 of the crimp terminal 100 and the nut 400 is large, the contact impedance at the elbow connector is small, heat is not easily generated, potential safety hazards can be reduced, and the crimping structure is safer and more reliable.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A crimping method of a crimping structure, characterized in that the crimping structure comprises: a cable core and a crimping terminal;

the crimp terminal includes:

the sleeve comprises a sleeve section, wherein one end of the sleeve section is provided with an opening, and the side wall of the sleeve section is provided with a threaded hole;

the connecting section is fixedly connected with the other end of the sleeve section, the connecting section is provided with a first surface and a second surface which are arranged in a reverse manner, and the connecting section is provided with a through hole which penetrates through the first surface and the second surface; and

the constant-force threaded connector is matched with the threaded hole and used for crimping the cable core and the sleeve section;

the sleeve section is sleeved on the cable core;

the constant-force threaded connector is matched with the threaded hole and is abutted against the cable core;

the crimping method comprises the following steps:

sleeving a sleeve section of the crimping terminal on the cable core, and pre-matching the constant-force threaded connecting piece with the threaded hole;

providing a pre-crimping sleeve, wherein the pre-crimping sleeve is provided with a hole cavity, the hole cavity is provided with a side wall and a bottom wall, one end of the pre-crimping sleeve is provided with an inlet, the side wall of the hole cavity is provided with a socket, the inlet and the socket are respectively communicated with the hole cavity, and when a connecting section of a crimping terminal is inserted into the socket, a first surface of the connecting section can be attached to the bottom wall; inserting the connecting section of the crimping terminal into the pre-pressing sleeve from the socket, and attaching the first surface to the bottom wall of the hole cavity;

providing a fixing screw rod and a nut matched with the fixing screw rod, inserting the fixing screw rod into the pre-pressing connecting sleeve from the inlet and penetrating into the through hole of the connecting section, and abutting the fixing screw rod against the bottom wall of the hole cavity;

observing whether the second surface is parallel to the end surface of the nut, if not, loosening the constant-force threaded connecting piece, adjusting the angle of the crimping terminal so that the second surface is parallel to the end surface of the nut, and then screwing the nut so that the end surface of the nut is parallel to and attached to the second surface;

screwing the constant-force threaded connecting piece until the constant-force threaded connecting piece is broken;

and respectively detaching the pre-crimping sleeve, the nut and the fixing screw rod from the crimping terminal.

2. The crimping method according to claim 1, further comprising, after the step of observing whether the second surface is parallel to the end surface of the nut, and if not, loosening the constant-force threaded connector, adjusting the angle of the crimp terminal so that the second surface is parallel to the end surface of the nut, and then tightening the nut so that the end surface of the nut is parallel to and conforms to the second surface:

and loosening the nut and the constant-force threaded connecting piece, repeating the observation of whether the second surface is parallel to the end surface of the nut, loosening the constant-force threaded connecting piece if the second surface is not parallel to the end surface of the nut, adjusting the angle of the crimping terminal so that the second surface is parallel to the end surface of the nut, and screwing the nut so that the end surface of the nut is parallel to and attached to the second surface.

3. The crimping method of claim 1, further comprising, after the step of tightening the constant force threaded connection until the constant force threaded connection breaks, the steps of:

and grinding and polishing the fracture surface of the constant-force threaded connecting piece so that the fracture surface and the outer peripheral surface of the sleeve section are in smooth transition.

4. The crimping method according to claim 1, wherein the threaded holes correspond one-to-one to the constant force threaded connectors;

the threaded holes at least comprise a first threaded hole and a second threaded hole, and the first threaded hole and the second threaded hole are arranged at intervals along the circumferential direction of the sleeve section.

5. The crimping method according to claim 1, wherein one end of the constant-force threaded connector is a concave arc surface for fitting with an outer peripheral surface of the cable core.

6. The crimping method of claim 1, wherein the connecting section is of unitary construction with one end of the sleeve section.

7. The crimping method of claim 1, wherein an inner wall of the sleeve segment is rugged.

8. The crimping method according to claim 1, wherein a surface of an end of the constant-force threaded connector facing away from the cable core is located on the same circumferential surface as an outer circumferential surface of the sleeve section.

9. The crimping method according to claim 1, wherein an outer surface of the crimp terminal has a tin plating layer.

10. A method of installing an elbow fitting, comprising the steps of:

providing an elbow-shaped insulating sleeve, wherein the elbow-shaped insulating sleeve comprises a first sleeve and a second sleeve which is fixedly connected with the first sleeve and arranged at an angle, and the first sleeve is communicated with the second sleeve;

providing a fixing screw and a nut matched with the fixing screw;

inserting a crimp terminal of a crimp structure manufactured by the crimping method according to any one of claims 1 to 9 into the first sleeve, and causing the connecting section to protrude into a joint of the first sleeve and the second sleeve, with a first surface of the connecting section being in close contact with an inner wall of the joint of the first sleeve and the second sleeve;

inserting the fixing screw into the second sleeve and penetrating into a through hole of a connecting section of the crimping terminal, and abutting the fixing screw against the inner wall of the connecting part of the first sleeve and the second sleeve;

and when the second surface is confirmed to be parallel to the end surface of the nut, the nut is screwed so that the end surface of the nut is parallel to and attached to the second surface.

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