A fixed-length wire feeding and pipe threading device

Abstract

The present invention discloses a fixed-length wire feeding and pipe threading device, which relates to special cable production equipment and aims to solve the problem that the cable length cannot be guaranteed after cutting. The key points of its technical solution are as follows: A fixed-length wire feeding and pipe threading device includes a frame, and the frame is provided with a heat shrinkable tube metering and supply mechanism, a cable metering and supply mechanism, and a heat shrinkable tube picking and transferring mechanism; both the heat shrinkable tube metering and supply mechanism and the cable metering and supply mechanism include a metering component, a traction component, and a cutting component; the heat shrinkable tube picking and transferring mechanism includes a three-axis motion component and a jaw component driven by the three-axis motion component; the three-axis motion component drives the jaw component to align with the wire outlet ends of the heat shrinkable tube metering and supply mechanism and the cable metering and supply mechanism in sequence. The fixed-length wire feeding and pipe threading device of the present invention effectively prevents the problem that the actual length of the cable cannot be guaranteed by respectively performing metering and supply on the heat shrinkable tube and the cable, and is more suitable for a fully automatic heat shrinkable tube cable production line.

Description

Technical Field

[0001] The present invention relates to special cable production equipment, and more specifically, to a fixed-length wire feeding and pipe threading device. Background Art

[0002] A heat-shrinkable tube cable refers to a conductive cable with higher protection performance, in which the cable main body and the joint connection position are wrapped by a heat-shrinkable tube, and is often used in electric vehicles.

[0003] The applicant designed a fully automatic production line for heat-shrinkable tube cables, which requires automatic counting and insertion of cables and heat-shrinkable tubes. In the prior art, the conventional treatment method is to complete the insertion of the full-length heat-shrinkable tube and cable, and then uniformly count and cut the heat-shrinkable tube after inserting the cable.

[0004] However, it is found in actual tests that there is a large gap between the heat-shrinkable tube and the cable before the heat-shrinkable tube is heated and shrunk, that is, the cable has a certain degree of mobility. Since the cable is inside the heat-shrinkable tube, it is impossible to perform counting traction on it. There is a problem that only the external heat-shrinkable tube can be traction-counted, and the cable length cannot be guaranteed after cutting, resulting in the subsequent processes being unable to be completed normally, and it is not applicable to a fully automatic production line for heat-shrinkable tube cables; therefore, a new solution is needed to solve this problem. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a fixed-length wire feeding and pipe threading device, which effectively prevents the problem that the actual length of the cable cannot be guaranteed by separately counting and supplying the heat-shrinkable tube and the cable, and is more suitable for a fully automatic production line for heat-shrinkable tube cables.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: A fixed-length wire feeding and pipe threading device includes a frame, and the frame is provided with a heat-shrinkable tube counting and supplying mechanism, a cable counting and supplying mechanism, and a heat-shrinkable tube picking and transferring mechanism; both the heat-shrinkable tube counting and supplying mechanism and the cable counting and supplying mechanism include a counting component, a traction component, and a cutting component; the heat-shrinkable tube picking and transferring mechanism includes a three-axis motion component and a jaw component driven by the three-axis motion component; the three-axis motion component drives the jaw component to align with the wire outlet ends of the heat-shrinkable tube counting and supplying mechanism and the cable counting and supplying mechanism in sequence.

[0007] By adopting the above technical solution, during the actual operation of the present application, the three-axis motion assembly drives the jaw assembly to align with and approach the heat shrink tube metering and feeding mechanism. The heat shrink tube metering and feeding mechanism pushes the heat shrink tube into the jaws of the jaw assembly through the traction assembly, and the metering assembly calculates the length of the heat shrink tube sent out. When the sent-out length reaches the set value, the cutting assembly cuts the heat shrink tube in the jaws of the jaw assembly; after the metering and cutting of the heat shrink tube and its picking-up are completed, the three-axis motion assembly drives the jaw assembly holding the heat shrink tube to align with and approach the discharge end of the cable metering and feeding assembly. The cable metering and feeding mechanism also completes the metering, sending, and cutting of the cable through the cooperation of the metering assembly, the traction assembly, and the cutting assembly. After the cable is cut, it is inserted into the heat shrink tube; finally, the three-axis motion assembly drives the jaw assembly and places the heat shrink tube with the inserted cable on the carrier for the processing of the next process; in summary, by separately performing metering and feeding on the heat shrink tube and the cable, compared with the prior art, the present application effectively prevents the problem that the actual length of the cable cannot be guaranteed, and is more suitable for a fully automatic heat shrink tube cable production line; it should be noted that if the actual length of the cable cannot be guaranteed, a device for repositioning the cable needs to be additionally provided, and it is quite inconvenient that the cable is inside the heat shrink tube.

[0008] The present invention is further configured as: the heat shrink tube metering and feeding mechanism further includes an unwinder, the unwinder includes an unwinder housing, a fixed arm installed inside the unwinder housing, and a movable arm slidably arranged relative to the fixed arm. Both the fixed arm and the movable arm are rotatably connected with six-jaw chucks, and the two six-jaw chucks are used for clamping both ends of the heat shrink tube winding reel. A lead screw drive assembly is arranged between the fixed arm and the movable arm to drive the movable arm.

[0009] The present invention is further configured as: three storage turntables and a reversing turntable are arranged between the unwinder and the heat shrink tube metering and feeding mechanism. The reversing turntable is horizontally arranged, and its circumferential surface is tangent to the traction path of the heat shrink tube metering and feeding mechanism.

[0010] The present invention is further configured as: an axis alignment assembly is arranged before the metering assembly of the heat shrink tube metering and feeding mechanism. The axis alignment assembly includes an upper alignment plate and a lower alignment plate with vertical mobility. At least two alignment wheels are rotatably connected to both the upper alignment plate and the lower alignment plate. An alignment electric cylinder is installed on the frame, the output end of the alignment electric cylinder is fixed to the lower alignment plate, an output rack is arranged on the lower alignment plate, an input rack is arranged on the upper alignment plate, and a synchronous gear is simultaneously engaged with the output rack and the input rack.

[0011] The present invention is further configured such that: the heat shrinkable tube length measuring and supplying mechanism and the cable length measuring and supplying mechanism further include a vertical mounting plate, on which an upper clamping distance seat and a lower clamping distance seat are slidably connected relatively vertically. The length measuring assembly and the traction assembly are both installed on the upper clamping distance seat and the lower clamping distance seat. The machine frame is equipped with a clamping distance electric cylinder, the output end of which is fixed to the lower clamping distance seat. The lower clamping distance seat is provided with an output rack, the upper clamping distance seat is provided with an input rack, and a synchronous gear is rotatably connected to the vertical mounting plate.

[0012] The present invention is further configured such that: the length measuring assembly includes a length measuring pressure wheel rotatably connected to the upper clamping distance seat, a length measuring device fixedly installed on the lower clamping distance seat, and a length measuring friction wheel installed on the input shaft of the length measuring device.

[0013] The present invention is further configured such that: the traction assembly includes two synchronous belt units respectively arranged on the upper clamping distance seat and the lower clamping distance seat. Each synchronous belt unit includes two synchronous belt wheels, a synchronous belt wound around the two synchronous belt wheels, a plurality of tensioning belt wheels for pressing against the synchronous belt, and a traction motor for driving one of the synchronous belt wheels.

[0014] The present invention is further configured such that: the cutting component includes a cutting knife seat slidably connected to the machine frame through two slide rails, and a threaded propulsion structure for driving the two cutting knife seats. Each of the two cutting knife seats is equipped with a cutting blade. The screw of the threaded propulsion structure is a double - helix screw, and the thread directions of the two sections are opposite. The cutting knife seat of the cable length measuring and supplying mechanism is provided with an elastic telescopic clamping plate, and a support conduit is arranged in front of the cutting blade of the heat shrinkable tube length measuring and supplying mechanism.

[0015] The present invention is further configured such that: the three - axis motion component includes an X - axis servo electric cylinder, a Y - axis servo electric cylinder, and a Z - axis driving cylinder. The X - axis servo electric cylinder is used to drive the gripper assembly to translate between the heat shrinkable tube length measuring and supplying mechanism and the cable length measuring and supplying mechanism. The Y - axis servo electric cylinder is used to drive the gripper assembly to approach and move away from the heat shrinkable tube length measuring and supplying mechanism and the cable length measuring and supplying mechanism. The Z - axis driving cylinder is used to drive the gripper assembly to lift.

[0016] The present invention is further configured such that: the gripper assembly includes a gripper mounting seat connected to the piston rod end of the Z - axis driving cylinder, multiple groups of clamps slidably connected to the gripper mounting seat, and a threaded propulsion structure for respectively driving each group of clamps to tighten or open. The screw of the threaded propulsion structure is a double - helix screw, and the thread directions of the two sections are opposite.

[0017] In summary, the present invention has the following beneficial effects: By separately performing length measurement and supply on the heat shrinkable tube and the cable, compared with the prior art, the problem that the actual length of the cable cannot be guaranteed is effectively prevented, and it is more suitable for a fully automatic heat shrinkable tube cable production line; it should be noted that if the actual length of the cable cannot be guaranteed, a device for repositioning the cable needs to be additionally provided, and since the cable is inside the heat shrinkable tube, there are great inconveniences; by equipping a dedicated uncoiler to uncoil the heat shrinkable tube, on the one hand, it provides convenience for workers to load the heat shrinkable tube roll, and on the other hand, it has the ability to actively uncoil and feed, avoiding large elastic stretching of the heat shrinkable tube caused by excessive traction force; the storage of the heat shrinkable tube is realized by the cooperation of three storage turntables, reducing the matching requirements of the uncoiler and the traction component, and the reversing turntable assists in aligning the heat shrinkable tube with the traction path of the traction component, further reducing the matching requirements of the uncoiler and the traction component; the axis alignment component is used to further correct the deviation of the heat shrinkable tube, further ensuring that the heat shrinkable tube is aligned with the traction path of the traction component; by pulling or pushing the alignment lower plate with the alignment electric cylinder, the clamping force of the alignment component can be adjusted; by setting the output rack, the input rack and the synchronous gear, it can be ensured that the center line of the clamp of the axis alignment component is always collinear with the traction path of the cable length measurement supply mechanism; the adjustment of the clamping distance between the length measurement component and the traction component is realized, achieving the technical effect of adapting to heat shrinkable tubes or cables with different cross-sectional diameters; it is ensured that both synchronous belt units have contact with the cable or the heat shrinkable tube, so as to ensure the sufficiency of the traction force under the premise of a smaller clamping force; the two cutting blades close in the center line, minimizing the influence of cutting on the position of the cable or the heat shrinkable tube; the cable is restricted by the elastic telescopic clamping plate, and the heat shrinkable tube is restricted by the support conduit, effectively preventing the cable or the heat shrinkable tube from bouncing away from the cutting openings of the two cutting blades; when the heat shrinkable tube is inserted into the clamp opening of the jaw assembly, the three clamps initially clamp in sequence, and when the cutting of the heat shrinkable tube is completed, the three clamps clamp the heat shrinkable tube, effectively preventing the problem of the two ends of the heat shrinkable tube drooping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present application;

[0019] Figure 2 is a schematic diagram of the overall structure of the present application from another perspective;

[0020] Figure 3 is a schematic diagram of the structure of the uncoiler of the present application. For the convenience of showing, some of its sheet metal parts are hidden in this figure;

[0021] Figure 4 is a schematic diagram of the structure of the heat shrinkable tube length measurement supply mechanism and the cable length measurement supply mechanism of the present application;

[0022] Figure 5 is Figure 4 a schematic diagram of the structure after hiding two protective shells;

[0023] Figure 6 This is a schematic structural view of the back of the heat shrinkable tube length counting and supplying mechanism of the present application;

[0024] Figure 7 This is a schematic structural view of the cutting component of the present application;

[0025] Figure 8 This is a schematic structural view of another perspective of the cutting component of the present application;

[0026] Figure 9 This is a schematic structural view of the heat shrinkable tube picking and transferring mechanism of the present application;

[0027] Figure 10 This is a schematic structural view of another perspective of the heat shrinkable tube picking and transferring mechanism of the present application.

[0028] Description of the drawings: 1. Frame; 111. Unwinding machine housing; 112. Fixed arm; 113. Movable arm; 114. Six-jaw chuck; 115. Lead screw drive assembly; 116. Storage turntable; 117. Reversing turntable; 121. Upper alignment plate; 122. Lower alignment plate; 123. Alignment wheel; 124. Alignment electric cylinder; 125. Output rack; 126. Input rack; 127. Synchronous gear; 131. Vertical assembly plate; 132. Upper clamping distance seat; 133. Lower clamping distance seat; 134. Clamping distance electric cylinder; 141. Length counting pressure wheel; 142. Length counter; 143. Length counting friction wheel; 151. Synchronous belt pulley; 152. Synchronous belt; 153. Tightening belt pulley; 154. Traction motor; 161. Cutting tool holder; 162. Thread propulsion structure; 163. Cutting blade; 164. Elastic telescopic clamping plate; 165. Support conduit; 171. X-axis servo electric cylinder; 172. Y-axis servo electric cylinder; 173. Z-axis driving cylinder; 181. Jaw assembly seat; 182. Fixture. Detailed implementation manners

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] A fixed-length wire feeding and pipe threading device, as Figure 1 , Figure 2 shown, includes a frame 1, on which a heat shrinkable tube length counting and supplying mechanism, a cable length counting and supplying mechanism, and a heat shrinkable tube picking and transferring mechanism are installed; both the heat shrinkable tube length counting and supplying mechanism and the cable length counting and supplying mechanism include a length counting component, a traction component, and a cutting component; the heat shrinkable tube picking and transferring mechanism includes a three-axis motion component and a jaw component driven by the three-axis motion component; the three-axis motion component drives the jaw component to be aligned with the wire outlet ends of the heat shrinkable tube length counting and supplying mechanism and the cable length counting and supplying mechanism in sequence.

[0031] During the actual operation of this application, the three-axis motion assembly drives the jaw assembly to align and approach the heat shrink tube metering and feeding mechanism. The heat shrink tube metering and feeding mechanism pushes the heat shrink tube into the jaws of the jaw assembly through the traction assembly, and the metering assembly calculates the length of the heat shrink tube sent out. When the sent length reaches the set value, the cutting assembly cuts the heat shrink tube in the jaws of the jaw assembly; after the metering and cutting of the heat shrink tube are completed and it is picked up, the three-axis motion assembly drives the jaw assembly holding the heat shrink tube to align and approach the discharge end of the cable metering and feeding assembly. The cable metering and feeding mechanism also completes the metering, feeding, and cutting of the cable through the cooperation of the metering assembly, the traction assembly, and the cutting assembly. After the cable is cut, it is inserted into the heat shrink tube; finally, the three-axis motion assembly drives the jaw assembly and places the heat shrink tube with the inserted cable on the carrier for the next process; in summary, this application effectively prevents the problem that the actual length of the cable cannot be guaranteed by separately metering and feeding the heat shrink tube and the cable, compared with the prior art, and is more suitable for a fully automatic heat shrink tube cable production line; it should be noted that if the actual length of the cable cannot be guaranteed, a device for repositioning the cable needs to be additionally set, and it is very inconvenient that the cable is inside the heat shrink tube.

[0032] During the trial operation, the applicant found that the heat shrink tube is characterized by being heavy and having a large elastic deformation ability. Therefore, directly using the traction assembly to pull the heat shrink tube requires a greater traction force to pull the heat shrink tube, which may cause a large elastic deformation of the heat shrink tube. After the heat shrink tube is sent out of the heat shrink tube metering and feeding mechanism, the heat shrink tube rebounds, resulting in the length of the heat shrink tube not meeting the set requirements. For this reason, as Figure 1 , Figure 2 , Figure 3 shown, the heat shrink tube metering and feeding mechanism further includes an unwinder. The unwinder includes an unwinder housing 111, a fixed arm 112 installed inside the unwinder housing 111, and a movable arm 113 slidably arranged relative to the fixed arm 112. Both the fixed arm 112 and the movable arm 113 are rotatably connected with six-jaw chucks 114. The two six-jaw chucks 114 are used to hold both ends of the heat shrink tube reel. A lead screw drive assembly 115 is provided between the fixed arm 112 and the movable arm 113 to drive the movable arm 113. The six-jaw chuck 114 installed on the fixed arm 112 is driven by a motor to rotate; by equipping a dedicated unwinder to unwind the heat shrink tube in this application, on the one hand, it provides convenience for workers to load the heat shrink tube roll, and on the other hand, it has the ability to actively unwind and feed, avoiding large-amplitude elastic stretching of the heat shrink tube caused by excessive traction force.

[0033] To reduce the cooperation requirements between the unwinder and the traction assembly, as Figure 1 , Figure 3As shown in the figure, there are three storage turntables 116 and one reversing turntable 117 arranged between the uncoiler and the heat shrink tube length measuring and supplying mechanism. The reversing turntable 117 is horizontally arranged, and its circumferential surface is tangent to the traction path of the heat shrink tube length measuring and supplying mechanism. Thus, the three storage turntables 116 cooperate to realize the storage of the heat shrink tube, reducing the matching degree requirement between the uncoiler and the traction assembly. The reversing turntable 117 assists the heat shrink tube to align with the traction path of the traction assembly, further reducing the matching degree requirement between the uncoiler and the traction assembly.

[0034] To further ensure that the heat shrink tube aligns with the traction path of the traction assembly, an axis alignment assembly is provided in front of the length measuring assembly of the heat shrink tube length measuring and supplying mechanism. As Figure 4 、 Figure 5 、 Figure 6 shown, the axis alignment assembly includes an upper alignment plate 121 and a lower alignment plate 122 with vertical mobility. At least two alignment wheels 123 are rotatably connected to both the upper alignment plate 121 and the lower alignment plate 122. Among them, two alignment wheels 123 are horizontally arrayed and installed on the upper alignment plate 121, and three alignment wheels 123 are horizontally arrayed and installed on the lower alignment plate. Before the heat shrink tube enters the length measuring assembly, it first contacts with multiple alignment wheels 123, so that the axis alignment assembly realizes further deviation correction of the heat shrink tube, further ensuring that the heat shrink tube aligns with the traction path of the traction assembly.

[0035] Since the heat shrink tube has a relatively low hardness, the axis alignment assembly has a higher requirement for the clamping force on the heat shrink tube. Therefore, as Figure 4 、 Figure 5 、 Figure 6 shown, the frame 1 is equipped with an alignment electric cylinder 124. The output end of the alignment electric cylinder 124 is fixed to the lower alignment plate 122. The lower alignment plate 122 is provided with an output rack 125, and the upper alignment plate 121 is provided with an input rack 126. The output rack 125 and the input rack 126 are simultaneously engaged with a synchronous gear 127. When the clamping force needs to be adjusted, the lower alignment plate 122 is pulled or pushed by the alignment electric cylinder 124, and the clamping force of the alignment assembly can be adjusted. And by setting the output rack 125, the input rack 126 and the synchronous gear 127, the displacements of the upper alignment plate 121 and the lower alignment plate 122 are synchronized, and it can be ensured that the center line of the clamping mouth of the axis alignment assembly is always collinear with the traction path of the cable length measuring and supplying mechanism.

[0036] This application is adapted to heat shrink tubes and cables with different cross-sectional diameters. As Figure 4 、 Figure 5 、 Figure 6As shown in the figure, the heat shrinkable tube length measuring and supplying mechanism and the cable length measuring and supplying mechanism further include a vertical assembly plate 131. The upper clamping distance seat 132 and the lower clamping distance seat 133 are vertically and relatively slidably connected to the vertical assembly plate 131. The length measuring assembly and the traction assembly are both installed on the upper clamping distance seat 132 and the lower clamping distance seat 133. The frame 1 is equipped with a clamping distance electric cylinder 134. The output end of the clamping distance electric cylinder 134 is fixed to the lower clamping distance seat 133. The lower clamping distance seat 133 is provided with an output rack 125, and the upper clamping distance seat 132 is provided with an input rack 126. The vertical assembly plate 131 is rotatably connected with a synchronous gear 127. When it is necessary to adjust the clamping distance of the length measuring assembly and the traction assembly to adapt to heat shrinkable tubes or cables with different cross-sectional diameters, the lower clamping distance seat 133 is pulled or pushed by the clamping distance electric cylinder 134, and under the cooperation of the output rack 125, the input rack 126 and the synchronous gear 127, the upper clamping distance seat 132 is synchronously driven, so as to realize the adjustment of the clamping distance of the length measuring assembly and the traction assembly, achieving the technical effect of adapting to heat shrinkable tubes or cables with different cross-sectional diameters.

[0037] The specific structure of the length measuring assembly is as follows. As Figure 5 shown, the length measuring assembly includes a length measuring pressure wheel 141 rotatably connected to the upper clamping distance seat 132, a length measuring device 142 fixedly installed on the lower clamping distance seat 133, and a length measuring friction wheel 143 installed on the input shaft of the length measuring device 142. The length measuring assembly forces the cable or the heat shrinkable tube to be pressed against the length measuring friction wheel 143 through the length measuring pressure wheel 141. During the process of the cable or the heat shrinkable tube being pulled forward, the length measuring friction wheel 143 is synchronously driven to rotate through the frictional force, so that the length measuring device 142 realizes the length detection of the cable or the heat shrinkable tube through the number of rotation circles of the length measuring friction wheel 143.

[0038] The specific structure of the traction assembly is as follows. As Figure 5 shown, the traction assembly includes two synchronous belt units respectively arranged on the upper clamping distance seat 132 and the lower clamping distance seat 133. The synchronous belt unit includes two synchronous belt wheels 151, a synchronous belt 152 wound around the two synchronous belt wheels 151, a plurality of tensioning belt wheels 153 for pressing against the synchronous belt 152, and a traction motor 154 for driving one of the synchronous belt wheels 151. When the traction assembly is working normally, the synchronous belt wheel 151 is driven to rotate by the traction motor 154. During the rotation process of the synchronous belt wheel 151, the synchronous belt 152 is driven to rotate in a cycle, so as to realize the forward traction through the frictional force between the synchronous belt 152 and the cable or the heat shrinkable tube. It should be noted that in this application, by setting the tensioning belt wheels 153 to support the synchronous belt 152, it is ensured that both synchronous belt units have a contact amount with the cable or the heat shrinkable tube, so as to ensure the sufficiency of the traction force under the premise of a smaller clamping force.

[0039] The specific structure of the cutting component is as follows. As Figure 7 、 Figure 8As shown in the figure, the shearing assembly includes two slide rails and sliders connected to the shearing tool holder 161 of the frame 1, and a screw propulsion structure 162 for driving the two shearing tool holders 161. Two shearing blades 163 are installed on the two shearing tool holders 161. The screw of the screw propulsion structure 162 is a double helix screw, and the helix directions of the two sections are opposite. When it is necessary to shear the cable or heat shrinkable tube, the two shearing tool holders 161 are synchronously driven by the screw propulsion structure 162 to approach each other until the two shearing blades 163 cross each other, and then the shearing of the cable or heat shrinkable tube can be completed. Moreover, the two shearing blades 163 close along the center line, minimizing the influence of shearing on the position of the cable or heat shrinkable tube.

[0040] It should be noted that, as Figure 7 shown, an elastic telescopic splint 164 is provided on the shearing tool holder 161 of the cable length measuring and supplying mechanism, and a support conduit 165 is provided in front of the shearing blade 163 of the heat shrinkable tube length measuring and supplying mechanism. Thus, during the shearing process, the cable is restricted by the elastic telescopic splint 164, and the heat shrinkable tube is restricted by the support conduit 165, effectively preventing the cable or heat shrinkable tube from bouncing away from the shear opening of the two shearing blades 163.

[0041] The specific structure of the three-axis motion assembly is as follows. As Figure 9 、 Figure 10 shown, the three-axis motion assembly includes an X-axis servo electric cylinder 171, a Y-axis servo electric cylinder 172, and a Z-axis driving cylinder 173. The X-axis servo electric cylinder 171 is used to drive the gripper assembly to translate between the heat shrinkable tube length measuring and supplying mechanism and the cable length measuring and supplying mechanism. The Y-axis servo electric cylinder 172 is used to drive the gripper assembly to approach and move away from the heat shrinkable tube length measuring and supplying mechanism and the cable length measuring and supplying mechanism. The Z-axis driving cylinder 173 is used to drive the gripper assembly to lift. Thus, the gripper assembly is given the ability to move in three axial directions to meet its motion requirements.

[0042] The specific structure of the gripper assembly is as follows. As Figure 9 、 Figure 10 shown, the gripper assembly includes a gripper assembly seat 181 connected to the piston rod end of the Z-axis driving cylinder 173, multiple groups of fixtures 182 slidably connected to the gripper assembly seat 181, and a screw propulsion structure 162 for driving each group of fixtures 182 to tighten or open respectively. The screw of the screw propulsion structure 162 is a double helix screw, and the helix directions of the two sections are opposite. In this embodiment, the number of fixtures 182 is three groups, and each group of fixtures 182 has three clamping positions: an open clamping mouth, a preliminary clamping, and a tight clamping. When the heat shrinkable tube is inserted into the clamping mouth of the gripper assembly, the three fixtures 182 are preliminarily clamped in sequence. When the shearing of the heat shrinkable tube is completed, the three fixtures 182 clamp the heat shrinkable tube, effectively preventing the problem of the two ends of the heat shrinkable tube drooping.

[0043] The specific embodiments are only explanations of the present invention and are not limitations thereof. After reading this specification, those skilled in the art may make modifications to this embodiment without creative contributions as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A fixed-length wire feeding and pipe threading device, comprising a frame (1), characterized in that: The frame (1) is provided with a heat shrinkable tube metering and supply mechanism, a cable metering and supply mechanism, and a heat shrinkable tube picking and transferring mechanism; Both the heat shrinkable tube metering and supply mechanism and the cable metering and supply mechanism include a metering component, a traction component, and a shearing component; The heat shrinkable tube metering and supply mechanism further includes an uncoiler, which includes an uncoiler housing (111), a fixed arm (112) installed in the uncoiler housing (111), and a movable arm (113) slidably arranged relative to the fixed arm (112). Both the fixed arm (112) and the movable arm (113) are rotatably connected with six-jaw chucks (114). The two six-jaw chucks (114) are used to clamp both ends of the heat shrinkable tube winding reel. A lead screw drive assembly (115) is arranged between the fixed arm (112) and the movable arm (113) to drive the movable arm (113); Three storage turntables (116) and a reversing turntable (117) are arranged between the uncoiler and the heat shrinkable tube metering and supply mechanism. The reversing turntable (117) is horizontally arranged, and its circumferential surface is tangent to the traction path of the heat shrinkable tube metering and supply mechanism The heat shrinkable tube picking and transferring mechanism includes a three-axis motion component and a jaw component driven by the three-axis motion component; The three-axis motion component drives the jaw component to be aligned with the wire outlet ends of the heat shrinkable tube metering and supply mechanism and the cable metering and supply mechanism in sequence.

2. The fixed-length wire feeding and pipe threading device according to claim 1, characterized in that: An axis alignment component is arranged in front of the metering component of the heat shrinkable tube metering and supply mechanism. The axis alignment component includes an upper alignment plate (121) and a lower alignment plate (122) with vertical mobility. At least two alignment wheels (123) are rotatably connected to both the upper alignment plate (121) and the lower alignment plate (122). An alignment electric cylinder (124) is installed on the frame (1). The output end of the alignment electric cylinder (124) is fixed to the lower alignment plate (122). The lower alignment plate (122) is provided with an output rack (125), and the upper alignment plate (121) is provided with an input rack (126). The output rack (125) and the input rack (126) are simultaneously engaged with a synchronous gear (127).

3. The fixed-length wire feeding and pipe threading device according to claim 1, characterized in that: The heat shrinkable tube metering and supply mechanism and the cable metering and supply mechanism further include a vertical assembly plate (131). The vertical assembly plate (131) is vertically and slidably connected with an upper clamping distance seat (132) and a lower clamping distance seat (133). The metering component and the traction component are both installed on the upper clamping distance seat (132) and the lower clamping distance seat (133). An clamping distance electric cylinder (134) is installed on the frame (1). The output end of the clamping distance electric cylinder (134) is fixed to the lower clamping distance seat (133). The lower clamping distance seat (133) is provided with an output rack (125), and the upper clamping distance seat (132) is provided with an input rack (126). The vertical assembly plate (131) is rotatably connected with a synchronous gear (127).

4. The fixed-length wire feeding and pipe threading device according to claim 3, characterized in that: The meter counting assembly includes a meter counting pressure wheel (141) rotatably connected to the upper clamping distance seat (132), a meter counter (142) fixedly installed on the lower clamping distance seat (133), and a meter counting friction wheel (143) installed on the input shaft of the meter counter (142).

5. The fixed-length wire feeding and pipe threading device according to claim 3, characterized in that: The traction assembly includes two synchronous belt units respectively arranged on the upper clamping distance seat (132) and the lower clamping distance seat (133). The synchronous belt unit includes two synchronous belt wheels (151), a synchronous belt (152) wound around the two synchronous belt wheels (151), a number of tightening belt wheels (153) for pressing against the synchronous belt (152), and a traction motor (154) for driving one of the synchronous belt wheels (151).

6. The fixed-length wire feeding and pipe threading device according to claim 1, wherein: The shearing assembly includes a shearing knife seat (161) with two slide rails and sliders connected to the frame (1), and a threaded propulsion structure (162) for driving the two shearing knife seats (161). Shearing blades (163) are installed on both of the two shearing knife seats (161). The screw of the threaded propulsion structure (162) is a double - helix screw, and the thread directions of the two sections are opposite. An elastic telescopic clamping plate (164) is arranged on the shearing knife seat (161) of the cable meter counting and supply mechanism, and a support conduit (165) is arranged before the shearing blade (163) in the heat - shrinkable tube meter counting and supply mechanism.

7. The fixed-length wire feeding and pipe threading device according to claim 1, characterized in that: The three - axis motion assembly includes an X - axis servo electric cylinder (171), a Y - axis servo electric cylinder (172), and a Z - axis driving cylinder (173). The X - axis servo electric cylinder (171) is used to drive the gripper assembly to translate between the heat - shrinkable tube meter counting and supply mechanism and the cable meter counting and supply mechanism. The Y - axis servo electric cylinder (172) is used to drive the gripper assembly to approach and move away from the heat - shrinkable tube meter counting and supply mechanism and the cable meter counting and supply mechanism. The Z - axis driving cylinder (173) is used to drive the gripper assembly to lift and lower.

8. The fixed-length wire feeding and pipe threading device according to claim 7, characterized in that: The gripper assembly includes a gripper assembly seat (181) connected to the piston rod end of the Z - axis driving cylinder (173), multiple groups of clamps (182) slidably connected to the gripper assembly seat (181), and a threaded propulsion structure (162) respectively used to drive each group of clamps (182) to tighten or open. The screw of the threaded propulsion structure (162) is a double - helix screw, and the thread directions of the two sections are opposite.

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