CN112589006B - Cable shearing mechanism with adjustable shearing length - Google Patents

Abstract

The invention relates to the field of cable shearing devices and discloses a cable shearing mechanism with adjustable shearing length, which comprises a shearing wheel, at least two limiting cylinders respectively positioned at two sides of the shearing wheel, at least one group of clamping assemblies arranged in the circumferential direction of the shearing wheel and rotating along with the shearing wheel, and a blade connected with the clamping assemblies; the clamping assembly is clamped by interference of the limiting cylinder in the rotating process along with the shearing wheel, and then the blade is driven to cut off the cable. The cable shearing mechanism can control the shearing length of the cable by controlling the rotating speed of the shearing wheel.

Description

Cable shearing mechanism with adjustable shearing length

Technical Field

The invention relates to the field of cable shearing devices, in particular to a cable shearing mechanism with adjustable shearing length.

Background

A relay is an electric control device that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount meets a predetermined requirement. It has an interactive relationship between the control system and the controlled system. It is commonly used in automated control circuits, which are actually a "recloser" that uses low current to control high current operation. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

The existing cable shearing device can not automatically adjust the length of each section of cable, and is difficult to adapt to different shearing requirements. For example, chinese patent publication No. CN110961552A discloses a shearing apparatus capable of shearing cables of different models, which comprises a base, wherein a power source is arranged on the left side of the base, rotary screws are symmetrically installed on two sides of the base, springs are all installed at one end of an extrusion pad, a control button is installed at the top end of the power source, a hydraulic press is installed at the top end of the base, a connecting bearing is arranged in the hydraulic press, a cutting blade is installed on one side of the connecting bearing, and another cutting blade is installed on the corresponding surface of the cutting blade. The shearing device adjusts the gap between the extrusion pad and the cable by rotating the screw rod, can adapt to cables with different diameters, but cannot meet the shearing requirements of cables with different lengths.

Disclosure of Invention

In order to solve the technical problem, the invention provides a cable shearing mechanism with adjustable shearing length. The cable shearing mechanism can control the shearing length of the cable by controlling the rotating speed of the shearing wheel.

The specific technical scheme of the invention is as follows:

a cable shearing mechanism with adjustable shearing length comprises a shearing wheel, at least two limiting cylinders respectively positioned at two sides of the shearing wheel, at least one group of clamping assemblies arranged in the circumferential direction of the shearing wheel and rotating along with the shearing wheel, and a blade connected with the clamping assemblies; the clamping assembly is clamped by interference of the limiting cylinder in the rotating process along with the shearing wheel, and then the blade is driven to cut off the cable.

In the cable shearing mechanism, when the clamping assembly rotates to the position of the limiting cylinder along with the shearing wheel, the clamping assembly is clamped by the interference of the limiting cylinder, and then the blade is driven to perform shearing action. By means of the structure, the frequency of the cutting blade for cutting the cable can be changed by changing the rotating speed of the cutting wheel, and the cutting length of each section of cable can be controlled at a specific cable transmission speed, so that the cutting requirements of cables with different lengths are met.

Preferably, the shearing mechanism includes:

a shear wheel; the circumferential surface of the shearing wheel is provided with at least one notch;

at least two limiting cylinders respectively close to two sides of the highest point of the shearing wheel;

the clamping assembly is arranged in the notch; the clamping assembly includes:

the connecting blocks are oppositely close to two side surfaces of the shearing wheel; one end of the connecting block is rotatably connected in the notch;

the first telescopic parts are arranged between the opposite connecting blocks;

the blade is arranged on the free end of the connecting block; the opposite connecting blocks are interfered by the limiting cylinder in the rotating process along with the shearing wheel to be closed, and then the blades are driven to cut off the cables.

The limiting cylinders are arranged on two sides of the highest point of the shearing wheel, the cable conveyed to the shearing wheel can be sheared near the highest point of the shearing wheel, and in the mode, the cable cannot be subjected to pressure along the radial direction of the shearing wheel in the shearing mechanism, so that friction force between the cable and the shearing wheel can be reduced, and the shearing mechanism cannot influence the conveying speed of the cable to cause deviation of shearing length.

Preferably, the clamping assembly comprises:

two fixed cylinders respectively close to two side surfaces of the shearing wheel and fixedly connected with the shearing wheel;

two connecting blocks which are respectively close to two side surfaces of the shearing wheel in opposite directions; one end of each connecting block is rotatably connected with one fixed cylinder; the connecting block comprises a clamping section, and the width of the clamping section is gradually increased from the end close to the fixing cylinder to the end far away from the fixing cylinder; the overall width of the two opposite clamping sections in an unclamped state is greater than the distance between the two opposite fixed cylinders, and the overall width in a maximum clamping state is not greater than the distance between the two opposite fixed cylinders; the distance between the opposite blades in an unclamped state is larger than the diameter of the cable, and the distance in a maximum clamped state is larger than the diameter of the cable;

and the first telescopic part is arranged between the opposite connecting blocks.

The working mechanism of the cable shearing mechanism is as follows: when the tight section of clamp in the connecting block rotated spacing cylinder's position along with the shearing wheel, along with the rotation of shearing wheel, the width that is in the connecting block between two spacing cylinders grow gradually, therefore two spacing cylinders can produce the extrusion to the connecting block, make it rotate around fixed cylinder, drive two blades and be close to each other and crisscross to cut off the cable. In this way, the cable is cut once when the clamping section rotates to the position of the limiting cylinder, so that the cutting length of the cable can be controlled by controlling the rotating speed of the cutting wheel at a specific cable speed.

Further, the shearing mechanism further comprises a first rotating motor; the shearing wheel is connected to a rotating shaft of the first rotating motor in a shaft-coupling mode.

Adopt first rotating electrical machines drive shear wheel to rotate, change cable shearing length through the rotational speed that changes first rotating electrical machines, enable control more accurate.

Further, the shearing mechanism further comprises a first support column; the first rotating motor and the limiting cylinder are arranged on the first supporting column.

Furthermore, a first wiring groove which is connected end to end and is annular and can accommodate cables is arranged on the circumferential central line of the shearing wheel.

Set up first trough in shear wheel circumference, play support and limiting displacement to the cable, can prevent that the cable from taking place the skew before getting into between two blades to prevent to leak and cut, the tangent plane is incomplete and cut length and the deviation scheduling problem appears.

Further, the depth of the notch is greater than that of the first wiring groove; the cutting thickness of the blade is greater than the cable diameter.

Adopt above-mentioned design, along with the rotation of shearing the wheel, after the cable got into the breach position from first trough, can reach and install between two blades in the breach, realize the shearing of cable.

Furthermore, at least one line supporting roller is arranged between the opposite connecting blocks; two ends of a roll shaft of the line supporting roll are respectively connected with the bottom of the notch through supporting plates; the supporting plate is elastically connected with the connecting block through the first telescopic component.

Because the depth of the notch is greater than the depth of the first wiring groove, the cable is easy to bend after entering the notch position from the first wiring groove, and the shearing length is deviated. The cable supporting roller is arranged in the notch, so that the cable firstly reaches the cable supporting roller when entering the notch and then enters the space between the two blades, and the cable supporting roller can support and support the cable, so that the cable is prevented from being bent in the notch to influence the shearing length.

Further, the circumferential surface of each wire supporting roller is internally tangent to the bottom of the first wiring groove.

Through the circular arc inscribe that makes the roller of holding up the line and constitute with first trough tank bottom, take place to buckle when preventing that the cable from first trough from reaching the roller of holding up the line to prevent better that shearing length from appearing the deviation.

Further, the number of the line supporting rollers is more than one; the diameter of the guide roller increases in a direction away from the fixed cylinder.

Further, the number of the line supporting rollers is more than one; the elastic coefficient of the first telescopic part is decreased progressively along the direction far away from the fixed cylinder.

When the connecting block is clamped by the interference of the limiting cylinder, the force arm of the force applied to the connecting block by the spring far away from the fixing cylinder is larger, and the moment is larger under the condition of equal acting force, so that the rotation of the connecting block is greatly hindered; and the spring farther from the fixed cylinder has larger compression amplitude, and the acting force generated on the connecting block is larger under the condition of the same elastic coefficient. Therefore, in order to reduce the obstruction of the spring resilience force to the connecting block clamping process, the spring elastic coefficient of the spring which is farther away from the fixed cylinder is smaller, so that the force generated on the connecting block when the connecting block is compressed is smaller, and the moment of the connecting block is reduced.

Furthermore, a second rotating motor is arranged in each connecting block; each of the blades is journaled on a rotating shaft of one of the second rotating electric machines.

Under the drive of second rotating electrical machines, enable the blade and cut the cable through rotatory mode, can not only improve cutting speed, can also prevent that blunt sword from causing the incomplete problem of cable tangent plane.

Furthermore, the limiting cylinder is rotatably connected with the first supporting column to realize the rotation of the limiting cylinder.

Make two relative connecting blocks press from both sides tight in-process at spacing cylinder through the extrusion, spacing cylinder's rotation can reduce its and the connecting block between the friction, therefore can reduce wearing and tearing between them, can also prevent to cause the hindrance to the rotation of shearing wheel simultaneously.

Further, the first telescopic part is a telescopic spring.

Compared with the prior art, the invention has the following advantages:

(1) The control on the cutting length of the cable can be realized by controlling the rotating speed of the cutting wheel;

(2) The design of the wire supporting roller can support and support the cable, and the deviation of the shearing length caused by bending of the cable in the notch is prevented;

(3) The blade cuts the cable through rotatory mode, can not only improve cutting speed, can also prevent that blunt sword from causing the incomplete problem of cable tangent plane.

Drawings

FIG. 1 is a schematic front view of an internal structure of a cable cutting device using the cutting mechanism of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic top view of the shearing mechanism of FIG. 1;

FIG. 4 is a front view of the cutting mechanism of FIG. 1 (with the first support post, first rotating electrical machine, and limiting cylinder removed);

fig. 5 is a front view of the shearing mechanism of fig. 1 (with the first support post, first rotating motor, limiting cylinder, fixed cylinder, connecting block, and blade removed).

The reference signs are: the cutting device comprises a cutting wheel 1-1, a limiting cylinder 1-2, a connecting block 1-3, a clamping section 1-3-1, a first telescopic part 1-4, a blade 1-5, a notch 1-6, a fixing cylinder 1-7, a first rotating motor 1-8, a first supporting column 1-9, a first wiring groove 1-10, a wire supporting roller 1-11, a supporting plate 1-12, a second rotating motor 1-13, a second supporting column 2-1, a third supporting column 2-2, a third rotating motor 2-3, a first gear 2-4, a third gear 2-6, a fourth gear 2-7, a first chain 2-8, a second chain 2-9, a supporting belt 2-10, a fourth supporting column 3-1, a sliding block 3-2, a second telescopic part 3-3, a pressing cylinder 3-4, a second wiring groove 3-5, a sliding groove 3-6 and an outer frame 4.

Detailed Description

The present invention will be further described with reference to the following examples. The devices, connections, and methods referred to in this disclosure are, unless specifically stated otherwise, all known in the art.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; may be mechanically coupled, directly coupled, or indirectly coupled through an intermediary. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

A cable shearing mechanism with adjustable shearing length is shown in a figure 1 and figures 3 to 5 and comprises two first supporting columns 1-9, a first rotating motor 1-8, a shearing wheel 1-1, two limiting cylinders 1-2, a clamping assembly, two blades 1-5, two second rotating motors 1-13 and four wire supporting rollers 1-11; the clamping assembly comprises two fixed cylinders 1-7, two connecting blocks 1-3 and a first telescopic part 1-4. The two first supporting columns 1-9 are arranged inside and outside (according to the direction shown in figure 1), and the lower ends are fixed at the bottom of the inner wall of the outer frame 4. The first rotating motor 1-8 is arranged on one of the first support columns 1-9; the cutting wheel 1-1 is connected with the rotating shaft of the first rotating motor 1-8 in a shaft mode and is located between the two first supporting columns 1-9. The circumferential surface of the shearing wheel 1-1 is provided with a gap 1-6; a first wiring groove 1-10 which is connected end to end in a ring shape and can contain cables is arranged on the circumferential central line of the shearing wheel 1-1; the depth of the gap 1-6 is larger than that of the first wiring groove 1-10. The two limiting cylinders 1-2 are respectively arranged at the tops of the two first supporting columns 1-9 in a groove mode and are respectively close to the two sides of the highest point of the shearing wheel 1-1. Two fixed cylinders 1-7 are arranged in the gaps 1-6, are respectively close to two side surfaces of the shearing wheel 1-1 and are fixedly connected with the shearing wheel 1-1. The two connecting blocks 1-3 are arranged in the gaps 1-6 and respectively approach to two side faces of the shearing wheel 1-1 in opposite directions; one end of each connecting block 1-3 is rotatably connected with a fixed cylinder 1-7; the connecting block 1-3 comprises a clamping section 1-3-1, the clamping section 1-3-1 is in a right trapezoid shape, the upper bottom of the clamping section is close to the end where the fixing cylinder 1-7 is located, and the lower bottom of the clamping section is far away from the end where the fixing cylinder 1-7 is located; the overall width of the two opposite clamping sections 1-3-1 in the unclamped state is greater than the distance between the two opposite fixing cylinders 1-7, and the overall width in the maximum clamping state is not greater than the distance between the two opposite fixing cylinders 1-7. A second rotating motor 1-13 is arranged in each connecting block 1-3; the free end of each connecting block 1-3 is provided with a blade 1-5; each blade 1-5 is coupled to a rotating shaft of a second rotating motor 1-13; the distance between the opposite blades 1-5 in an unclamped state is larger than the diameter of the cable, and the distance in a maximum clamped state is larger than the diameter of the cable; the cutting thickness of the blades 1-5 is greater than the cable diameter. The wire supporting rollers 1-11 are arranged between the two connecting blocks 1-3, the diameters of the wire supporting rollers 1-11 increase progressively along the direction far away from the fixed cylinder 1-7, the diameters of the first telescopic components 1-4 (telescopic springs) increase progressively along the direction far away from the fixed cylinder 1-7, namely the elastic coefficients decrease progressively along the direction far away from the fixed cylinder 1-7; two ends of a roll shaft of the line supporting roll 1-11 are respectively connected with the bottoms of the notches 1-6 through support plates 1-12, the support plates 1-12 are elastically connected with connecting blocks 1-3 through first telescopic parts 1-4, and the first telescopic parts 1-4 are telescopic springs; the circumferential surface of each wire supporting roller 1-11 is internally tangent with the bottom of the first wiring groove 1-10. As shown in figure 1, when the connecting block 1-3 rotates to the highest point, the end with larger width of the clamping section 1-3-1 is close to the conveying mechanism, and the end with smaller width is far away from the conveying mechanism.

The relay protection cable shearing device adopting the cable shearing mechanism comprises a transmission mechanism, a limiting mechanism and an outer frame 4 besides the cable shearing mechanism as shown in fig. 1. The limiting mechanism is arranged above the transmission mechanism and used for pressing the cable on the transmission mechanism; the shearing mechanism is arranged on the right side of the conveying mechanism; the conveying mechanism and the shearing mechanism are arranged at the bottom of the inner wall of the outer frame 4, and the limiting mechanism is arranged at the top of the inner wall of the outer frame 4.

As shown in fig. 1 and 2, the conveying mechanism includes two second supporting columns 2-1, two third supporting columns 2-2, a third rotating motor 2-3, a first gear 2-4, a second gear, a third gear 2-6, a fourth gear 2-7, a first chain 2-8, a second chain 2-9, and a supporting belt 2-10. The two second supporting columns 2-1 and the two third supporting columns 2-2 are arranged inside and outside, and the third supporting columns 2-2 and the second supporting columns 2-1 are arranged left and right (according to the direction shown in figure 1); the lower ends of the third supporting column 2-2 and the second supporting column 2-1 are fixed at the bottom of the inner wall of the outer frame 4. The third rotating motor 2-3 is arranged on the second supporting column 2-1; the first gear 2-4 and the second gear are pivoted on the rotating shaft of the third rotating motor 2-3 and are positioned between the two second supporting columns 2-1. The third gear 2-6 and the fourth gear 2-7 are coaxial, and two ends of the rotating shaft are respectively connected with the two third supporting columns 2-2. The third gear 2-6 is in transmission connection with the first gear 2-4 through a first chain 2-8, and the fourth gear 2-7 is in transmission connection with the second gear through a second chain 2-9; the supporting belts 2-10 are made of rubber materials, are wrapped on the outer sides of the first chains 2-8 and the second chains 2-9, and are connected with the first chains 2-8 and the second chains 2-9 at two sides respectively. The first gear 2-4, the second gear, the third gear 2-6 and the fourth gear 2-7 have the same specification, and the highest point is on the same horizontal plane.

As shown in fig. 1 and 2, the limiting mechanism includes two fourth supporting columns 3-1, two sliding blocks 3-2, two second telescopic parts 3-3, a pressing cylinder 3-4, and a second wiring groove 3-5. The two fourth supporting columns 3-1 are arranged inside and outside (according to the direction shown in fig. 1), and the upper ends of the four fourth supporting columns are fixed on the top of the inner wall of the outer frame 4. Each fourth supporting column 3-1 is provided with a sliding groove 3-6; the sliding block 3-2 is clamped in the sliding groove 3-6; the second telescopic part 3-3 is a pressing spring, the upper end of the second telescopic part is connected with the top of the sliding groove 3-6, the lower end of the second telescopic part is connected with the sliding block 3-2, and the second telescopic part can drive the sliding block 3-2 to vertically slide downwards on the fourth supporting column 3-1. The pressing cylinder 3-4 is cylindrical and is arranged between the two fourth supporting columns 3-1, and two ends of the pressing cylinder are respectively and rotatably connected with the two sliding blocks 3-2 to realize the autorotation of the pressing cylinder 3-4; a second wiring groove 3-5 which is connected end to end in a ring shape and can contain cables is arranged on the circumferential central line of the pressing cylinder 3-4; the long axis of the pressing drum 3-4 is perpendicular to the cable conveying direction of the conveying mechanism.

The working process of the cable shearing device is as follows: the cable is fed into the upper surface of the supporting belt 2-10 from the opening at the left side of the outer frame 4 and is plugged into the second wiring groove 3-5 of the pressing cylinder 3-4; starting a first rotating motor 1-8, a second rotating motor 1-13 and a third rotating motor 2-3, wherein the third rotating motor 2-3 drives a first gear 2-4 and a second gear to rotate (clockwise according to the orientation shown in figure 1), and drives a third gear 2-6 and a fourth gear 2-7 to rotate through a first chain 2-8 and a second chain 2-9, and then the cables are conveyed into a first wiring groove 1-10 of a shearing wheel 1-1 through the movement of a supporting belt 2-10; the first rotating motor 1-8 drives the cutting wheel 1-1 to rotate (rotate clockwise according to the direction shown in the figure 1), when the connecting block 1-3 rotates to the highest point along with the cutting wheel 1-1, the connecting block 1-3 rotates around the fixed cylinder 1-7 under the extrusion of the two limiting cylinders 1-2, and the two blades 1-5 are close to each other; the second rotary motor 1-13 drives the blades 1-5 to rotate, and when the two blades 1-5 are staggered, the cable can be cut off. By controlling the speed of rotation of the first rotating electrical machine 1-8 at a given cable transport speed, the cutting speed and thus the cut length of each cable section can be controlled. The shearing wheel 1-1 and the first gear 2-4 have the same rotating direction, so that the friction of the shearing wheel 1-1 on the cable can be reduced, the transmission of the cable is facilitated, the instability of the transmission speed caused by the overlarge friction of the cable can be prevented, and the deviation of the shearing length is further prevented.

Example 2

The difference between the embodiment and the embodiment 1 is that the limiting cylinder 1-2 realizes the rotation of the limiting cylinder 1-2 through the rotary connection with the first supporting column 1-9.

In the process that the two opposite connecting blocks 1-3 are clamped by the limiting cylinders 1-2 through extrusion, the friction between the limiting cylinders 1-2 and the connecting blocks 1-3 can be reduced through autorotation of the limiting cylinders 1-2, so that abrasion between the limiting cylinders and the connecting blocks can be reduced, and obstruction to rotation of the shearing wheels 1-1 can be prevented.

Example 3

The difference between this embodiment and embodiment 1 is that two notches 1-6 are provided on the circumferential surface of the cutting wheel 1-1 at equal intervals, and each notch 1-6 is provided with a group of clamping assemblies. The total number of the blades 1-5 and the second rotating motors 1-13 is four, and the total number of the wire supporting rollers 1-11 is eight.

By arranging the two gaps 1-6 at equal intervals, the shearing wheel 1-1 rotates for a circle to realize twice shearing, and the rotating speed of the shearing wheel 1-1 can be reduced under the condition that the required cable shearing length is the same, so that the energy consumption of the first rotating motor 1-8 in the operation process is reduced.

Example 4

The present embodiment is different from embodiment 1 in that in the clamping assembly, two connecting blocks 1-3 stacked up and down are rotatably connected to each fixing cylinder 1-7, and thus the number of the connecting blocks 1-3 is four (two are opposite to each other in one set).

Example 5

This embodiment differs from embodiment 1 in that the four guide rollers 1 to 11 have the same diameter; the first telescopic parts 1-4 (telescopic springs) have the same specifications, i.e. the same spring constant.

Example 6

The difference between the embodiment and the embodiment 2 is that the number of the limiting cylinders 1-2 is four; two limiting cylinders 1-2 are arranged on each side of the shearing wheel 1-1, and the distance between the limiting cylinder 1-2 on the right side and the shearing wheel 1-1 is smaller than that between the limiting cylinder 1-2 on the left side (according to the orientation shown in figure 1).

The connecting block 1-3 is slightly compressed by the limiting cylinder 1-2 on the left side, and is further compressed by the limiting cylinder 1-2 on the right side, and the design can reduce fatigue caused by rapid compression of the telescopic spring, so that the service life of the telescopic spring is prolonged.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (7)

1. A cable cutting mechanism with adjustable cutting length is characterized by comprising:

a shear wheel (1-1); the circumferential surface of the shearing wheel (1-1) is provided with at least one notch (1-6); a first wiring groove (1-10) which is connected end to end and is annular and can accommodate cables is arranged on the circumferential central line of the shearing wheel (1-1); the depth of the notch (1-6) is greater than that of the first wiring groove (1-10);

at least two limiting cylinders (1-2) respectively close to two sides of the highest point of the shearing wheel (1-1);

the clamping assembly is arranged in the gap (1-6); the clamping assembly includes:

the connecting blocks (1-3) are oppositely close to two side surfaces of the shearing wheel (1-1); one end of the connecting block (1-3) is rotatably connected in the notch; a line supporting roller (1-11) is arranged between the opposite connecting blocks (1-3); two ends of a roll shaft of the line supporting roll (1-11) are respectively connected with the bottom of the notch (1-6) through a support plate (1-12); the supporting plates (1-12) are elastically connected with the connecting blocks (1-3) through the first telescopic parts (1-4); the number of the line supporting rollers (1-11) is more than one, and the elastic coefficient of the first telescopic component (1-4) is decreased in a direction away from the fixed cylinder (1-7);

the first telescopic parts (1-4) are arranged between the opposite connecting blocks (1-3);

the blade (1-5) is arranged at the free end of the connecting block (1-3); the opposite connecting blocks (1-3) are closed by the interference of the limiting cylinders (1-2) in the process of rotating along with the shearing wheels (1-1), and then the blades (1-5) are driven to cut off the cables.

2. The shearing mechanism as recited in claim 1 wherein said clamping assembly comprises:

two fixed cylinders (1-7) which are respectively close to two side surfaces of the shearing wheel (1-1) and are fixedly connected with the shearing wheel (1-1);

two connecting blocks (1-3) which are respectively close to two side surfaces of the shearing wheel (1-1) in opposite directions; one end of each connecting block (1-3) is rotatably connected with one fixed cylinder (1-7); the connecting block (1-3) comprises a clamping section (1-3-1), and the width of the clamping section (1-3-1) is gradually increased from the end close to the fixing cylinder (1-7) to the end far away from the fixing cylinder (1-7); the overall width of the two opposite clamping sections (1-3-1) in an unclamped state is larger than the distance between the two opposite fixed cylinders (1-7), and the overall width in a maximum clamping state is not larger than the distance between the two opposite fixed cylinders (1-7); the distance between the opposite blades (1-5) in the unclamped state is larger than the diameter of the cable, and the cable is cut off in the maximum clamped state.

3. A cutting mechanism according to claim 1 or 2, characterized in that the cutting thickness of the blades (1-5) is larger than the cable diameter.

4. A cutting mechanism according to claim 1 or 2, wherein the circumferential surface of each of the rollers (1-11) is inscribed in the bottom of the first routing groove (1-10).

5. A cutting mechanism according to claim 1, characterized in that the diameter of the guide rollers (1-11) increases in a direction away from the stationary cylinder (1-7).

6. A cutting mechanism according to claim 1 or 2, characterized in that a second rotating electric machine (1-13) is provided in each of said connecting blocks (1-3); each blade (1-5) is coupled to the rotating shaft of one second rotating motor (1-13).

7. A cutting mechanism according to claim 1, wherein the limiting cylinder (1-2) is adapted to rotate by being rotatably connected to the first support column (1-9).

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