A cable joint pre-assembly device

Abstract

A cable joint pre-assembly device belongs to the technical field of equipment for assembling line connectors, comprising: a first material arranging system, comprising a strip-shaped slot for arranging bodies, the front end of which is provided with two horizontally arranged and mutually parallel guide rails for conveying the bodies, and a pushing plate for pushing the bodies is arranged in the strip-shaped slot; a second material arranging system, comprising a conveying slot, the bottom of the front end of which is provided with a through hole, the bottom surface of the middle section of which has a blocking surface, and a material arranging slot is arranged outside the conveying slot along the extension track of the blocking surface; a positioning mechanism, comprising a first sensor, a second sensor and a pair of baffles, the first sensor being arranged in the sidewall of one of the guide rails, the baffles being arranged above the two guide rails respectively, the bottom surface of the baffle being provided with a semicircular slot, and the top of the semicircular slot being provided with a V-shaped slot; and a driving mechanism comprising a disc coaxially arranged below the through hole. The scheme can automatically complete the conveying and positioning of the nut and the body, and achieve the purpose of automatically assembling the cable joint.

Description

Technical Field

[0001] This invention belongs to the technical field of equipment for assembling line connectors, and particularly relates to a cable connector pre-assembly device. Background Technology

[0002] Common cable connectors such as Figure 1 As shown, the connector mainly includes the connector body and a locking nut. The middle section of the body is an external nut structure, and both ends are set as external threaded tubes, or one end is an external threaded tube and the other end is a round tube. The end of the external threaded tube at one end has claws arranged in a circumferential array. The outer end of the locking nut usually has a hemispherical structure to facilitate a smooth transition with the outer wall of the cable. When connecting the cable, the body and locking nut are used as a set. The end of the body with claws passes through the inside of the nut, and the nut connects to the external threaded tube with claws through a threaded structure. For ease of installation and use, the body and nut need to be pre-assembled before the cable connector is packaged, so that the threads of the nut and the external threaded tube partially connect. Because the two ends of the body and the nut are different, there is only one connection state during assembly. If automated assembly is used, the body and nut need to be adjusted first, then aligned, and finally assembled. Although there are material feeding devices in the existing technology that can adjust and arrange the body and nut, the overall structure of the adjustment is relatively complex. Most of them require the use of flipping mechanisms or clamps, which makes the composition of the whole set of equipment relatively complex. Therefore, this kind of pre-assembly work is usually done manually. However, manual assembly is inefficient and cannot meet the production needs. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a cable connector pre-assembly device that can automatically transport and position the nut and body, and achieve the purpose of automatically assembling cable connectors.

[0004] In order to achieve the objective of this invention, the following solution is proposed:

[0005] A cable connector pre-assembly device is disclosed. The cable connector includes a body and a nut. The outer threaded end of the front end of the body is provided with a claw, and the middle section has a coaxially arranged hexagonal prism. The outer end of the nut has a hemispherical structure, and the inner end has a planar structure. The pre-assembly device includes: a first feeding system, a second feeding system, a positioning mechanism, and a driving mechanism.

[0006] The first feeding system includes a strip trough for arranging the body, with two horizontally arranged and parallel guide rails extending forward at its front end for conveying the body, and a pusher plate for pushing the body is provided inside the strip trough.

[0007] The second discharging system comprises a conveying groove, the rear end of which is provided with a push plate arranged to move along the conveying direction, the front end bottom of the conveying groove is provided with a through hole, the middle section of the conveying groove has a blocking surface protruding from the bottom surface, the protruding height of which is less than half of the protruding dimension of the half-sphere structure from the outer end surface of the nut, and the outer side of the conveying groove along the extension track of the blocking surface is provided with a discharging groove;

[0008] The positioning mechanism comprises a first sensor, a second sensor and a pair of baffles, the first sensor is arranged through the side wall of one of the guide rails, the baffles are arranged above the two guide rails respectively, the bottom surface of the baffle is provided with a semicircular groove, the two semicircular grooves have the same radius and are coaxial with the through hole, and the top of the semicircular groove is provided with a V-shaped groove, when the first sensor detects the body, the body is coaxial with the semicircular groove.

[0009] The driving mechanism comprises a disc coaxially arranged below the through hole, the top surface of the disc is matched with the half-sphere structure of the nut, the disc is arranged to move in the vertical direction and rotate around the axis thereof.

[0010] The beneficial effects of the present application are that: the first discharging system and the second discharging system are used to automatically arrange and convey the body and the nut respectively, which provides necessary conditions for automatic assembly work, and the discharging system has simple structure and stable and reliable arrangement effect; the discharging system can convey the body and the nut with qualified posture to the positioning mechanism for positioning, and then the driving structure is used to assemble the nut and the body, so that automatic assembly work is realized, which helps to improve the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0011] The drawings described herein are only for illustrating selected embodiments, rather than all possible embodiments, and are not intended to limit the scope of the present application.

[0012] Figure 1 A schematic diagram of a cable joint structure preassembled by the present application is shown.

[0013] Figure 2 A schematic diagram of the overall structure of the preassembly equipment of the present application is shown.

[0014] Figure 3 A schematic diagram of the first discharging system of the present application is shown. Figure 2 An enlarged view of the local part at A in the middle.

[0015] Figure 4 A schematic diagram of the first discharging system of the present application is shown.

[0016] Figure 5 A schematic diagram of the positioning mechanism of the present application is shown.

[0017] Figure 6 A partial sectional view of the positioning mechanism of the present application when positioning the body is shown.

[0018] Figure 7 The structural schematic diagram of the second discharging system of the application is shown.

[0019] Figure 8 The structural schematic diagram of the second discharging system of the application is shown. Figure 7 The local enlarged view at B in the figure.

[0020] Figure 9 The structural schematic diagram of the second discharging system of the application is shown.

[0021] Figure 10 The structural schematic diagram of the second discharging system of the application is shown. Figure 9 The local enlarged view at C in the figure.

[0022] Figure 11 The sectional view of the application along the width direction of the conveying groove is shown.

[0023] Figure 12 The structural schematic diagram of the second discharging system of the application is shown. Figure 11 The local enlarged view at D in the figure.

[0024] Figure 13 The local sectional view of the positioning mechanism when the upper end of the six-prism middle section of the body is inserted into the V-shaped groove is shown.

[0025] Figure 14 The local sectional view of the positioning mechanism when the body and the nut are preassembled is shown.

[0026] Markings in the figure: bar groove-11, guide rail-12, pushing plate-13, hopper-14, conveying groove-21, through hole-211, blocking surface-212, stepped surface-213, pushing plate-22, discharging groove-23, blocking bar-24, guide rod-25, storage groove-26, horizontal bar-27, first sensor-31, second sensor-32, blocking plate-33, semicircular groove-331, V-shaped groove-332, third sensor-34, telescopic pin-35, telescopic spring-351, disc-41, positioning rod-411, lifting device-42, motor-43, supporting rod-431, cylindrical spring-44, body-91, nut-92. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the embodiments of the application are described in detail below with reference to the drawings, but the embodiments described in the application are part of the embodiments of the application, not all the embodiments of the application.

[0028] As Figure 1As shown, the cable joint comprises a body 91 and a nut 92, the outer threaded end of the front end of the body 91 is provided with a jaw, the middle section has a coaxially arranged hexagonal prism, i.e. the outer nut of the middle section of the body 91, the outer end of the nut 92 is provided with a hemispherical structure, and the inner end is a flat structure, in assembly, the front end of the body 91 and the jaw are inserted into the inner end of the nut 92, and the nut 92 is connected with the body 91 through threads.

[0029] As shown in the drawings, Figure 2 a cable joint pre-assembly device for assembling the above-mentioned cable joint, the device comprising: a first dispensing system, a second dispensing system, a positioning mechanism and a driving mechanism.

[0030] Specifically, as shown in the drawings, Figures 2 to 4 the first dispensing system comprises a strip-shaped slot 11 for arranging the body 91, the front end of which is provided with two horizontally arranged and mutually parallel guide rails 12 for conveying the body 91. Specifically, the distance between the guide rails 12 is greater than the diameter of the outer thread of the body 91 and less than the distance between the opposite outer sides of the hexagonal prism of the middle section of the body 91, and the width of the strip-shaped slot 11 matches the cross-sectional outer contour of the body 91. Because the front end of the body 91 is provided with a jaw, the weight of the front end is greater than that of the rear end, and when the body 91 is placed in the strip-shaped slot 11, the body 91 usually assumes a flat posture, and the middle section of the body 91 is usually designed as a hexagonal prism structure to facilitate tightening, so in one embodiment the width of the strip-shaped slot 11 matches the distance between the opposite edges of the hexagonal prism, and this structure can ensure that only one row of bodies 91 can be arranged in the strip-shaped slot 11. As a further preferred embodiment, in another more preferred embodiment, the width of the strip-shaped slot 11 matches the distance between the opposite outer walls of the hexagonal prism, and the strip-shaped slot 11 is provided with a push plate 13 arranged to move along the length direction thereof for pushing the body 91 in the strip-shaped slot 11 to move between the two guide rails 12. Specifically, the rear end of the strip-shaped slot 11 is provided with an extension device for driving the push plate 13 to move, and the extension device is a pneumatic cylinder or a linear motor.

[0031] Specifically, as shown in the drawings, Figure 2 , Figure 7 and Figure 9As shown, the second discharging system comprises a conveying groove 21, the rear end of which is provided with a push plate 22 arranged to move in the conveying direction, and the front end of the conveying groove 21 is provided with a through hole 211. As preferred, the front end of the conveying groove 21 is in a closed structure to prevent the nut 92 from being discharged from the front end of the conveying groove 21. Specifically, the inner diameter of the through hole 211 is smaller than the diameter of the hemisphere of the outer end of the nut 92 and larger than the inner hole diameter of the nut 92, and the width of the front end of the conveying groove 21 matches the distance between the opposite outer walls of the nut 92 to prevent the nut 92 from moving in the width direction of the conveying groove 21, so that the nut 92 moves along the fixed track of the conveying groove 21, thereby ensuring that the hemisphere structure outside the nut 92 can accurately fall on the through hole 211 to achieve the purpose of positioning the nut 92. The middle section of the conveying groove 21 has a blocking surface 212 protruding from the bottom surface, and the protruding height of the blocking surface 212 is less than half the size of the hemisphere structure protruding from the outer end surface of the nut 92. As further preferred, the smaller the height of the blocking surface 212 protruding from the bottom surface of the conveying groove 21, the more suitable it is, because the smaller the protruding height, the easier it is for the nut 92 with the downward hemisphere structure to move to the front end of the conveying groove 21 by overcoming the blocking surface 212. For example, if the hemisphere structure protrudes 10 mm from the end surface of the nut 92, then the height of the blocking surface 212 protruding from the bottom surface of the conveying groove 21 is less than 5 mm, preferably 1 mm, 2 mm, 3 mm, or less than one third, one fourth or one fifth of the size of the hemisphere structure protruding from the end surface of the nut 92. One end of the blocking surface 212 is inclined toward the outside of the front end of the conveying groove 21, and the outside of the conveying groove 21 is provided with a discharging groove 23 along the extension track of the blocking surface 212 for discharging the nut 92 with the upward hemisphere structure. Specifically, when the hemisphere structure is upward, the plane of the inner end of the nut 92 will be attached to the bottom surface of the conveying groove 21, so it cannot overcome the blocking surface 212. Under the extrusion and pushing of the rear nut 92, the nut 92 in this state will enter the discharging groove 23 along the blocking surface 212, while the nut 92 with the downward hemisphere structure can overcome the blocking surface 212 and move smoothly to the front end of the conveying groove 21, thereby realizing the selection of the posture of the nut 92 and allowing the nut 92 with the upward inner end to be conveyed to the front end of the conveying groove 21.

[0032] Specifically, as Figure 3 、 Figures 5 to 7 and Figures 11 to 14As shown, the positioning mechanism includes a first sensor 31, a second sensor 32 and a pair of baffles 33. The first sensor 31 is arranged in the sidewall of one of the guide rails 12 to detect the arrival signal of the body 91. When the arrival signal of the body 91 is detected, the device stops pushing the body 91 forward. The second sensor 32 is arranged on the side of the front end of the conveying groove 21. When the second sensor 32 detects the cap 92, the cap 92 is located above the through hole 211. The baffles 33 are arranged above the same section of the two guide rails 12. The distance between the two baffles 33 is greater than or equal to the distance between the two guide rails 12. The distance between the bottom surface of the baffle 33 and the top surface of the guide rail 12 is greater than the height of the middle six-prism of the body 91. A semicircular groove 331 is arranged on the bottom surface of one side of the baffle 33. The inner diameter of the semicircular groove 331 is greater than the distance between the opposite edges of the middle six-prism of the body 91. The radii of the semicircular grooves 331 at the bottom of the two baffles 33 are the same and coaxial with the through hole 211. A V-shaped groove 332 is arranged at the top of the semicircular groove 331. The profile of the V-shaped groove 332 matches the outer profile of the middle six-prism of the body 91. When the first sensor 31 detects the body 91, the body 91 is coaxial with the semicircular groove 331.

[0033] Specifically, as shown in Figure 2 、 Figure 3 、 Figures 11 to 14 The driving mechanism includes a disc 41 coaxially arranged below the through hole 211. The top surface of the disc 41 matches the hemispherical structure of the cap 92, so the top surface of the disc 41 is a semicircular hole structure. The outer diameter of the disc 41 is smaller than the inner diameter of the through hole 211. The disc 41 is arranged to move in the vertical direction and rotate around its own axis.

[0034] When the device is working, the first discharging system is used to arrange the bodies 91 and make the front ends of the bodies 91 all downward. The bodies 91 move forward along the guide rails 12. When the first sensor 31 detects the arrival signal of the body 91, the first discharging system stops conveying the body 91. The second discharging system is used to convey the cap 92 and make the hemispherical structure downward and the inner end upward. The cap 92 is conveyed to the front end of the conveying groove 21, When the second sensor 32 detects the screw cap 92, the second discharge system is stopped The conveying of the screw cap 92 is continued; the disc 41 is raised and uses it to push the screw cap 92 on the through hole 211 upwards, because at this time the baffle 33 is below the body 91 and is coaxial with the through hole 211, so the screw cap 92 that is pushed up will automatically be sleeved outside the lower end of the body 91 Figure 2, the disc 41 will lift the matched body 91 and the nut 92 together, the hexagonal prism of the middle section of the body 91 is inserted into the semicircular groove 331, at the same time, the disc 41 exerts upward pre-pressing force on the body 91, so that the top surface of the hexagonal prism of the middle section of the body 91 is pressed against the bottom surface of the semicircular groove 331, at this time, the top surface of the disc 41 is higher than the conveying groove 21, so that the nut 92 is separated from the conveying groove 21; then the disc 41 is rotated in the direction of tightening the nut 92, the disc 41 will drive the nut 92 and the body 91 to rotate together, when the body 91 rotates to the predetermined position, the opposite two edges of the hexagonal prism of the middle section will match the position of the V-shaped groove 332, because the body 91 has upward pre-pressing force, therefore the upper end of the hexagonal prism will enter the V-shaped groove 332, for limiting the rotation of the body 91, continuing to rotate the disc 41 can only drive the nut 92 to rotate, so that the threads between the nut 92 and the body 91 are connected, thus the pre-assembly work between the nut 92 and the body 91 is completed; then the disc 41 is lowered, the bottom surface of the hexagonal prism of the middle section of the body 91 is supported on the guide rail 12 again, and the pre-assembled body 91 and nut 92 are conveyed to the front end of the guide rail 12 through the first discharging system, until the body 91 at the rear is detected by the first sensor 31 again, the conveying groove 21 also continues to convey the nut 92 to the front end, until the nut 92 is detected by the second sensor 32 again, preparing for the next pre-assembly.

[0035] The scheme not only can realize automatic assembly work, but also can automatically discharge and convey and position the nut 92 and the body 91, and the first discharging system and the second discharging system have simple overall structure and high reliability.

[0036] Preferably, as shown in Figure 4 , Figure 3 , the upper part of the strip-shaped groove 11 is communicated with the hopper 14 for temporarily storing the body 91, the height between the bottom surface of the hopper 14 on the side of the guide rail 12 and the bottom surface of the strip-shaped groove 11 is less than the length of the body 91, even if part of the body 91 is vertically standing in the strip-shaped groove 11, it will be blocked by the bottom surface of the hopper 14 and be pushed down, so that the body 91 is in the posture of lying flat and moves to the guide rail 12, this scheme not only can reduce the frequency of manual feeding, but also can further adjust the posture of the body 91, so that the body 91 is in the posture of lying flat and moves to the guide rail 12.

[0037] Preferably, as shown in Figure 5 , Figure 6 , Figures 12 to 14 and Figure 3As shown, the positioning mechanism further comprises a third sensor 34 which penetrates through the baffle 33 downwardly for detecting the position signal of the top surface of the hexagonal prism in the middle section of the body 91. Specifically, the detection area of the third sensor 34 is located within the range of the top surface of the V-shaped groove 332. When the third sensor 34 detects the in-position signal of the top surface of the hexagonal prism and the in-position signal disappears again, the disc 41 stops rotating and moves downwardly, which indicates that the front end of the body 91 has been inserted into the screw cap 92 to the required depth, and the disappearance of the signal again is used as the descending signal of the disc 41 to further improve the automation degree of the equipment and reduce the error probability. In the present scheme, after the third sensor 34 detects the in-position signal of the top surface of the hexagonal prism, the signal disappears due to the upward pre-pressing force applied by the disc 41 to the body 91 during the pre-assembly process, and the screw cap 92 also bears the upward pre-pressing force. During the gradual connection of the threads of the screw cap 92 and the body 91, the screw cap 92 will gradually rise. When the inner end of the screw cap 92 abuts against the bottom surface of the guide rail 12, continuing to rotate the screw cap 92 will cause the body 91 to move downwardly to adapt to the threaded connection structure between the screw cap 92 and the body 91. If the rotation of the screw cap 92 is not stopped in time, the hexagonal prism of the screw cap 92 and the body 91 will be pressed against the upper and lower surfaces of the guide rail 12, resulting in that the pre-assembled body 91 and screw cap 92 are stuck on the guide rail 12 and cannot be smoothly output. The third sensor 34 is arranged to lose the detection signal of the top surface of the hexagonal prism when the body 91 moves downwardly by a predetermined height, so as to determine the connection depth between the screw cap 92 and the body 91 to prevent the connection from being too deep and stuck.

[0038] Preferably, as shown in Figure 5 , Figure 6 and Figures 7 to 10 , along the length direction of the guide rail 12, the first sensor 31 is provided with telescopic pins 35 on both sides. The front end of the telescopic pin 35 is in spherical surface structure, and the rear end is provided with a telescopic spring 351. When the telescopic spring 351 is in natural state, the spherical surface of the front end of the telescopic pin 35 protrudes from the inner wall of the guide rail 12. Two guide rails 12 are provided with telescopic pins 35 and telescopic springs 351 at the same length position. When the first sensor 31 detects the in-position signal of the body 91, the external thread at the front end of the body 91 contacts the front end of the telescopic pin 35, so as to limit the body 91 by the four telescopic pins 35 to prevent the body 91 from moving to the front end of the guide rail 12 under the action of inertia, and to limit the position of the body 91 to prevent displacement of the body 91 during cooperation with the screw cap 92.

[0039] Preferably, as shown in Figure 7As shown, the side wall of the conveying groove 21 is provided with a baffle 24 above the position corresponding to the communication with the discharging groove 23, and the side wall of the conveying groove 21 is provided with vertical guide rods 25, the two ends of the baffle 24 are slidingly connected to the two guide rods 25, and the distance between the bottom surface of the baffle 24 in the lowest position and the bottom surface of the discharging groove 23 is less than the height of the cap 92, and the height difference is less than the height of the hemisphere structure protruding from the outer end surface of the cap 92. In the specific structure, when the height of the hemisphere structure protruding from the outer end surface of the cap 92 is 8mm, the height difference can be set to 1mm-5mm, and the smaller the height difference, the more conducive to the cap 92 with the hemisphere structure upward entering the discharging groove 23. After the above structure is set, when the cap 92 with the hemisphere structure upward passes through the baffle 24, because the inner end of the cap 92 is downward, it is limited and guided by the blocking surface 212, the cap 92 in this posture will move to the discharging groove 23, because the hemisphere structure of the cap 92 is upward, so the hemisphere structure can push the baffle 24 to move upward along the guide rod 25 to avoid the cap 92 with the hemisphere structure upward, so that it can smoothly enter the discharging groove 23, and after the cap 92 passes through, the baffle 24 will automatically fall down under the action of gravity; when the cap 92 with the hemisphere structure downward passes through the baffle 24, because the inner end of the cap 92 is upward, it loses the pushing of the hemisphere structure, the inner end of the cap 92 is a flat structure and cannot be clamped into the bottom surface of the baffle 24, so it cannot push the baffle 24 upward, and the cap 92 in this posture can only be conveyed forward along the conveying groove 21.

[0040] Preferably, as shown in Figure 10 , Figure 7 As shown, one side of the rear end of the conveying groove 21 is provided with a storage groove 26, and the end facing the conveying groove 21 is inclined downward, and the upper side of the communication position between the storage groove 26 and the conveying groove 21 is provided with a horizontal bar 27, the distance between the horizontal bar 27 and the bottom surface of the conveying groove 21 is greater than the height of the cap 92, and less than the distance between the opposite sides of the outer six-prism of the cap 92, so as to prevent the cap 92 in the posture of contacting the conveying groove 21 with the outer side surface of the six-prism from entering the conveying groove 21, and the horizontal bar 27 can make the cap 92 entering the conveying groove 21 only have two postures of the hemisphere structure downward or upward.

[0041] Preferably, as shown in Figure 10 , Figure 2As shown, the width of the front section of the conveying groove 21 matches the distance between the opposite sides of the outer hexagonal prism of the nut 92, and the width of the rear section of the conveying groove 21 is greater than or equal to the distance between the opposite edges of the outer hexagonal prism of the nut 92, so that the nut 92 temporarily stored in the storage groove 26 is more easily fed into the conveying groove 21. The inner walls of the two side plates of the conveying groove 21 are provided with stepped surfaces 213 at the junctions of the front and rear sections of the conveying groove 21, and the stepped surfaces 213 on the two sides are arranged in a staggered manner along the length direction of the conveying groove 21, and the staggered distance is greater than the width of the side of the outer hexagonal prism of the nut 92. By arranging the stepped surfaces 213 and limiting the positions thereof, the stepped surfaces 213 can be used to guide the nut 92, so that the nut 92 is smoothly fed from the rear section to the front section of the conveying groove 21.

[0042] Preferably, as shown in Figure 11 , Figure 11 The driving mechanism further comprises a lifting device 42 arranged below the through hole 211, and a motor 43 is arranged at the top of the movable rod of the lifting device 42. The disc 41 is coaxially arranged at the upper end of the main shaft of the motor 43. The lifting device 42 is used to control the lifting of the motor 43 and the disc 41, and the motor 43 is used to control the rotation of the disc 41.

[0043] Further preferably, as shown in Figure 3 The bottom of the motor 43 is provided with a support rod 431 parallel to the main shaft thereof, and a cylindrical spring 44 is arranged outside the support rod 431. The support rod 431 is coaxially arranged in the movable rod of the lifting device 42, and the cylindrical spring 44 is arranged between the top surface of the movable rod and the bottom surface of the motor 43. The elastic force of the cylindrical spring 44 is used to apply an upward pre-pressure to the body 91. The disc 41 does not need to be continuously lifted by the lifting device 42, and the hexagonal prism outside the body 91 can be pressed into the V-shaped groove 332 by the elastic force of the cylindrical spring 44.

[0044] Further preferably, as shown in Figures 12 to 14 , ​ The top of the disc 41 is coaxially provided with a positioning rod 411 for positioning the inner hole of the nut 92, preventing the nut 92 from falling during assembly, and ensuring the positional accuracy between the nut 92 and the body 91.

[0045] The above description is only the preferred embodiments of the present application, and does not mean the only or limiting the present application. Those skilled in the art should understand that various changes or equivalent replacements made to the present application without departing from the scope of the present application, all belong to the scope of protection of the present application.

Claims

1. A cable joint pre-assembly device, the cable joint comprising a body (91) and a nut (92), the body (91) having a female end at its front end with a jaw at the end of the female, and a hexagonal section coaxially arranged thereon, the nut (92) having a hemispherical structure at its outer end and a planar structure at its inner end, characterised in that, The preloading device comprises a first discharging system, a second discharging system, a positioning mechanism and a driving mechanism. The first discharging system comprises a strip-shaped slot (11) for arranging the bodies (91), the front end of which extends forward and is provided with two horizontal guide rails (12) arranged in parallel with each other for conveying the bodies (91), and the strip-shaped slot (11) is provided with a pushing plate (13) for pushing the bodies (91). The second discharging system comprises a conveying slot (21) provided with a pushing plate (22) arranged to move along the conveying direction at the rear end of the conveying slot (21), the front end of the conveying slot (21) is provided with a through hole (211) at the bottom, the middle section of the conveying slot (21) is provided with a blocking surface (212) protruding from the bottom surface, the protruding height of which is less than one half of the protruding dimension of the half-sphere structure from the outer end surface of the nut (92); one end of the blocking surface (212) is inclined towards the outside of the front end of the conveying slot (21), and the outside of the conveying slot (21) is provided with a discharging slot (23) along the extension track of the blocking surface (212). The positioning mechanism comprises a first sensor (31), a second sensor (32) and a pair of baffles (33), the first sensor (31) is arranged to pass through the side wall of one of the guide rails (12), the second sensor (32) is arranged to the side of the front end of the conveying slot (21), and the baffles (33) are arranged above the two guide rails (12), the bottom surface of the baffle (33) is provided with a semi-circular slot (331), the radii of the two semi-circular slots (331) are the same and coaxial with the through hole (211), and the top of the semi-circular slot (331) is provided with a V-shaped slot (332); when the first sensor (31) detects the body (91), the body (91) is coaxial with the semi-circular slot (331); when the second sensor (32) detects the nut (92), the nut (92) is located above the through hole (211). The driving mechanism comprises a disc (41) arranged coaxially below the through hole (211), the top surface of which matches the half-sphere structure of the nut (92), and the disc (41) is arranged to move in the vertical direction and rotate around its own axis.

2. A cable splice pre-assembly according to claim 1, characterized in that The strip-shaped slot (11) is connected to the top of the hopper (14) for temporarily storing the bodies (91), and the height between the bottom surface of the hopper (14) towards the side of the guide rail (12) and the bottom surface of the strip-shaped slot (11) is less than the length of the body (91).

3. A cable splice pre-assembly according to claim 1, wherein, The positioning mechanism further comprises a third sensor (34) arranged to pass through the baffle (33) downwardly for detecting the position signal of the top surface of the six-prism of the body (91); when the third sensor (34) detects the arrival signal of the top surface of the six-prism and the arrival signal disappears again, the disc (41) stops rotating and moves downwardly.

4. A cable splice pre-assembly according to claim 1, wherein, The first sensor (31) is provided with a telescopic pin (35) on both sides along the length direction of the guide rail (12), the front end of the telescopic pin (35) is provided with a spherical surface structure, and the rear end is provided with a telescopic spring (351), when the telescopic spring (351) is in a natural state, the spherical surface of the front end of the telescopic pin (35) protrudes from the inner wall of the guide rail (12), the same length position of the two guide rails (12) is provided with the telescopic pin (35) and the telescopic spring (351), when the first sensor (31) detects the in-place signal of the body (91), the outer thread at the front end of the body (91) is in contact with the front end of the telescopic pin (35).

5. A cable splice pre-assembly according to claim 1, wherein, The side wall of the conveying groove (21) is provided with a blocking strip (24) above the position corresponding to the communication position of the discharging groove (23), the side wall of the conveying groove (21) is provided with a guide rod (25) in a vertical state, the two ends of the blocking strip (24) are slidingly connected to the two guide rods (25), and the distance between the bottom surface of the blocking strip (24) and the bottom surface of the discharging groove (23) is less than the height of the screw cap (92) when the blocking strip (24) is in the lowest position, and the height difference is less than the height of the hemispherical structure protruding from the outer end surface of the screw cap (92).

6. A cable splice pre-assembly according to claim 1, wherein, The side of the conveying groove (21) at the rear end is provided with a storage groove (26), one end of the storage groove (26) facing the conveying groove (21) is inclined downward, and the upper side of the communication position of the storage groove (26) and the conveying groove (21) is provided with a horizontal strip (27), the distance between the horizontal strip (27) and the bottom surface of the conveying groove (21) is greater than the height of the screw cap (92) and less than the distance between the opposite side surfaces of the external hexagonal prism of the screw cap (92).

7. A cable joint pre-assembly according to claim 6, wherein, The width of the front section of the conveying groove (21) matches the distance between the opposite side surfaces of the external hexagonal prism of the screw cap (92), the width of the rear section of the conveying groove (21) is greater than or equal to the distance between the opposite side surfaces of the external hexagonal prism of the screw cap (92), the inner walls of the two side plates of the conveying groove (21) correspond to the junctions of the front and rear sections of the conveying groove (21) and are provided with stepped surfaces (213), and the stepped surfaces (213) on the two sides are arranged in a staggered manner along the length direction of the conveying groove (21), and the staggered distance is greater than the width of the side surface of the external hexagonal prism of the screw cap (92).

8. A cable splice pre-assembly according to claim 1, wherein, The driving mechanism further comprises a lifting device (42) arranged below the through hole (211), and a motor (43) is arranged at the top of the movable rod of the lifting device (42).

9. A cable splice pre-assembly according to claim 8, wherein, The bottom of the motor (43) is provided with a support rod (431) parallel to the main shaft of the motor (43), the outside of the support rod (431) is provided with a cylindrical spring (44), the support rod (431) is coaxially arranged in the movable rod of the lifting device (42), and the cylindrical spring (44) is located between the top surface of the movable rod and the bottom surface of the motor (43).

10. A cable splice pre-assembly according to claim 1, wherein, The top of the disc (41) is coaxially provided with a positioning rod (411) for positioning the inner hole of the screw cap (92).

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