A thermoplastic tube heating device for a wiring harness terminal
By designing a wire harness terminal thermoplastic tube heating device with a tilting shaking plate and a dual-axis linear module, the problems of unreliable feeding and separation and low positioning accuracy were solved, realizing orderly single-wire separation and uniform heating of the wire harness, thereby improving product quality and production efficiency.
Patent Information
- Application Number
- CN202611147001.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-30
- Publication Date
- 2026-11-03
AI Technical Summary
Existing heating devices for wire harness terminal thermoplastic tubes have problems such as unreliable feeding and separation, poor conveying orientation, and low positioning and clamping accuracy, resulting in uneven heating and inconsistent product quality.
The feeding mechanism adopts a design with inclined shaking plate, side guard plate and inclined guard plate. The dual-axis linear module drives the conveying and sorting mechanism of heating components. Pneumatic clamps are used for precise positioning and heating. The screw adjustment adapts to wire harnesses of different diameters, realizing orderly single wire separation, stable clamping and uniform heating of wire harnesses.
It enables orderly feeding of wire harnesses, single-wire separation, and precise positioning, ensuring uniform heating and consistent product quality. It adapts to wire harnesses of different diameters, improving production efficiency and product consistency.
Smart Images
Figure CN123034186A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wire harness processing and manufacturing technology, and in particular to a heating device for thermoplastic tubes of wire harness terminals. Background Technology
[0002] After assembly, wire harness terminals typically require the application of heat shrink tubing to the end of the terminal. Heating causes the heat shrink tubing to shrink and cover the outside of the wire harness terminal, providing insulation, sealing, moisture protection, and mechanical fixation. Currently, the heating of heat shrink tubing for wire harness terminals mainly includes the following methods: Manual Heating: In traditional operations, operators typically use a windproof lighter, hot air gun, or hair dryer to heat the heat shrink tubing. During heating, the outer flame should be at approximately a 45° angle to the surface of the heat shrink tubing, and the tubing should be moved back and forth to ensure even heating. Heating should proceed slowly from one end to the other to avoid air bubbles. After cooling, trimming is performed. Dedicated Heat Shrink Tubing Heating Machines: With the increasing demands of wire harness processing, heat shrink tubing heating machines have emerged. The furnace-type heat shrink tubing machine uses four-sided heating and electronic constant temperature control, ensuring uniform temperature. It automatically stops heating when the set temperature is reached and automatically supplements heat if the temperature is insufficient, avoiding problems such as uneven heating or burning of the tubing during manual heating. Automatic heat shrink tubing threading machines have also emerged in the field of wire harness processing. Their working principle is to use high-temperature heating to heat the heat shrink tubing to a certain temperature, causing it to shrink and adhere tightly to the surface of the object being covered. It mainly consists of a heating system, a transmission system, a control system, and a shell, and can control parameters such as heating time and temperature to ensure the stability and reliability of the heat shrinking effect. Summary of the Invention
[0003] To address the problems of unreliable feeding and separation, poor conveying directionality, and low positioning and clamping accuracy in existing wire harness terminal thermoplastic tube heating devices, this paper provides a wire harness terminal thermoplastic tube heating device that can achieve automatic and orderly feeding of wire harnesses, single-wire separation and conveying, precise sorting and positioning, and stable clamping and heating. The solution is a heating device for a wire harness terminal thermoplastic tube, including a thermoplastic device. The thermoplastic device includes a mounting platform with two suction components spaced apart on the mounting platform. A snap-fit component is provided on one side of each suction component. A dual-axis linear module is mounted on the mounting platform, and a heating component is mounted on the dual-axis linear module. A conveying mechanism is provided on one side of the mounting platform, and a sorting mechanism is provided at the lower part of the conveying mechanism. A feeding mechanism is provided at the end of the conveying mechanism opposite to the sorting mechanism. A vibrating plate is inclined on the feeding mechanism, and side guards are provided on both sides of the vibrating plate. An inclined guard is provided on the upper part of the two side guards, and the inclined guard is in the same direction as the vibrating plate. A linear reciprocating drive mechanism is mounted at the lower part of the vibrating plate. A three-axis linear module is mounted on the mounting platform, and a pneumatic clamp is mounted on the three-axis linear module. The sorting mechanism includes a belt conveyor with sorting plates on both sides at the upper part of the belt conveyor. The distance between the two sorting plates gradually decreases towards the mounting platform. A sorting baffle is provided on the side of the sorting plate facing the mounting platform.
[0004] Preferably, the lower part of the shaking plate is provided with two support plates spaced apart, and two sliders are installed on the lower part of the support plates. The side plate is installed on the feeding rack, and two guide rods are installed on the feeding rack. The guide rods pass through the sliders and are slidably connected to the sliders.
[0005] A slider connecting frame is connected between the two sliders. A connecting rod is rotatably connected to the lower part of the slider connecting frame. A drive rod is rotatably connected to the free end of the connecting rod. A drive motor is installed on the feeding frame. The output shaft of the drive motor is fixedly connected to the free end of the drive rod.
[0006] Preferably, a slider connecting frame is connected between the two sliders. A connecting rod is rotatably connected to the lower part of the slider connecting frame. A rotating pin is connected to the free end of the connecting rod. A first driving rod is installed at the other end of the rotating pin. A second driving rod is rotatably connected to the free end of the first driving rod. A drive motor is installed on the feeding frame. A drive shaft is coaxially fixedly connected to the output shaft of the drive motor. The drive shaft is fixedly connected to the free end of the second driving rod. A first threaded hole is provided in the middle of the transmission pin. A second threaded hole is provided at the end of the drive shaft. A screw is spirally connected in the first threaded hole and the second threaded hole.
[0007] Preferably, the threads of the first threaded hole and the threads of the second threaded hole have opposite helical directions and the same pitch.
[0008] Preferably, the conveying mechanism includes a lower conveying component and an upper conveying component, which are spaced apart. The lower conveying component includes a drive shaft and a driven shaft, and two symmetrically spaced lower conveyor belts are provided between the drive shaft and the driven shaft. The drive shaft is connected to a drive motor. The upper conveying component includes two spaced upper rotating shafts, and two symmetrically spaced upper conveyor belts are provided between the two upper rotating shafts.
[0009] Preferably, the upper conveying mechanism is provided with a conveying frame, a drive shaft is mounted on the conveying frame, a drive gear is mounted on the drive shaft, a front rack is mounted on one end of the drive gear, a rear rack is mounted on the other end, a front baffle is mounted on the lower end of the front rack, and a rear baffle is mounted on the lower part of the rear rack. Both the front baffle and the rear baffle pass downward through the gap between the two upper conveyor belts. The drive shaft is connected to a separator drive motor mounted on the conveying frame.
[0010] The beneficial effects of this invention are: orderly feeding and reliable single-wire separation. The feeding mechanism adopts an inclined vibrating plate, and side guard plates and inclined guard plates are set on both sides. Through the reciprocating linear motion of the vibrating plate and the coordination of the inclined direction, the wire harness is output one by one from the gap between the vibrating plate and the inclined guard plate under the action of gravity and vibration. At the same time, through the gradually decreasing gap design between the inclined guard plate and the vibrating plate, it is ensured that only one wire harness is output at a time, preventing stacking and jamming. The conveying and sorting system boasts excellent orientation and high positioning accuracy. The conveying mechanism employs a double conveyor belt structure (the lower conveyor assembly with a drive shaft and a driven shaft provides the driving force, while the upper conveyor assembly with an upper rotating shaft and an upper rotating shaft provides the pre-clamping force), effectively preventing wire harness deflection during transport. The sorting mechanism utilizes sorting plates with gradually decreasing spacing on both sides and sorting baffles, combined with pneumatic clamps, to precisely grasp and place each wire harness individually, ensuring accurate and reliable positioning. The system features uniform heating and consistent quality. A dual-axis linear module drives the heating assembly to move along the sorting mechanism and along the vertical and horizontal planes, providing stable and uniform heating and thermoforming of the wire harnesses clamped on the clamping assembly. This avoids defects such as uneven thickness, bubbles, or burns that easily occur with manual heating, ensuring product consistency. Significantly improved; excellent adaptability to wire harnesses of different diameters. By adjusting the distance between the first and second threaded holes with a screw, the effective driving radius of the drive rod is effectively changed, thereby adjusting the reciprocating linear motion stroke of the vibrating plate. This allows the same equipment to be used for wire harnesses of different diameter ranges, preventing feeding blockage and ensuring stable feeding. Coordinated loading and unloading rhythms enable continuous operation. The partition drive motor drives the active gear to rotate, causing the front and rear baffles to move up and down at intervals, enabling wire harnesses to enter the sorting mechanism one by one from the conveying mechanism. When the clamping component on one side is being thermoplasticized, the pneumatic clamp can place the wire harness on the clamping component on the other side, realizing a parallel operation mode of "processing while feeding", further improving the overall output rhythm of the equipment. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0012] Figure 2 For the present invention Figure 1 A schematic diagram of the right-side structure.
[0013] Figure 3 For the present invention Figure 1 A schematic diagram of the three-dimensional structure.
[0014] Figure 4 This is a three-dimensional schematic diagram of the feeding mechanism of the present invention.
[0015] Figure 5 This is a three-dimensional schematic diagram of the reciprocating linear drive mechanism of the present invention.
[0016] Figure 6 This is a three-dimensional schematic diagram of the sorting mechanism of the present invention.
[0017] The reference numerals in the attached diagrams are as follows: 1. Mounting platform; 2. Suction assembly; 3. Clip assembly; 4. Heating assembly; 5. Conveying mechanism; 6. Sorting mechanism; 7. Feeding mechanism; 8. Vibrating plate; 9. Side guard plate; 10. Inclined guard plate; 11. Pneumatic clamp; 12. Belt conveyor; 13. Sorting plate; 14. Sorting baffle; 15. Slider; 16. Feeding rack; 17. Guide rod; 18. Slider connecting frame; 19. Connecting rod; 20. Rotating pin; 21. First drive rod; 22. Second drive rod; 23. Drive motor; 24. Screw; 25. Conveyor frame; 27. Drive gear; 28. Rear rack; 29. Front rack; 30. Front baffle; 31. Rear baffle; 32. Three-axis linear module; 33. Two-axis linear module. Detailed Implementation
[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0019] Depend on Figures 1 to 6Provided is a heating device for thermoplastic tubes of wire harness terminals, comprising a thermoplastic device, the thermoplastic device including a mounting platform 1, two suction components 2 spaced apart on the mounting platform 1, and a snap-fit component 3 on one side of each suction component 2. The device is characterized in that a dual-axis linear module 33 is mounted on the mounting platform 1, a heating component 4 is mounted on the dual-axis linear module, a conveying mechanism 5 is provided on one side of the mounting platform 1, a sorting mechanism 6 is provided at the lower part of the conveying mechanism 5, a feeding mechanism 7 is provided at the end of the conveying mechanism 5 opposite to the sorting mechanism 6, a vibrating plate 8 is inclined and provided at the feeding end, side guard plates 9 are provided on both sides of the vibrating plate 8, and an inclined guard plate 10 is provided on the upper part of the two side guard plates 9, the inclined guard plate 10 and the vibrating plate 8 are connected to the vibrating plate 8. The tilting direction of plates 8 is consistent. The distance between the tilting plates and the vibrating plates 8 towards the conveying mechanism 5 gradually decreases, and the distance width is greater than the width of one wire harness but less than the width of two wire harness diameters. A linear reciprocating drive mechanism is installed at the lower part of the vibrating plates 8. A three-axis linear module 32 is installed on the mounting platform 1, and a pneumatic clamp 11 is installed on the three-axis linear module 32. The sorting mechanism 6 includes a belt conveyor 12, and sorting plates 13 are provided on both sides of the belt conveyor 12. The distance between the two sorting plates 13 towards the mounting platform 1 gradually decreases, and the distance between the two sorting plates 13 towards the mounting platform 1 is greater than the diameter of one wire harness but less than the diameter of two wire harnesses. A sorting baffle 14 is provided on the side of the sorting plates 13 facing the mounting platform 1. The two-axis linear module drives the heating component 4 to move along the sorting mechanism 6 and along the horizontal plane perpendicular to the sorting mechanism 6. The three-axis linear module 32 drives the pneumatic clamp 11 to move linearly in the XYZ directions. The wire harnesses requiring thermoforming are placed in the feeding mechanism 7. The direction of movement of the wire harnesses is perpendicular to the direction in which they are placed, and the direction in which they are placed is parallel to the conveying direction of the belt conveyor 12 of the sorting mechanism 6. The end of the wire harness to be thermoformed faces the mounting platform 1. The wire harnesses to be thermoformed are placed in the feeding mechanism 7. Driven by the tilting action of the vibrating plate 8 and the lateral reciprocating motion, the wire harnesses enter the conveying mechanism 5 one by one, and then enter the sorting mechanism 6 through the conveying mechanism 5. The belt conveyor 12 of the sorting mechanism 6 drives the wire harnesses to move. Under the action of the two sorting plates 13, the positions are gradually adjusted, and then the wire harnesses are output from the smaller end of the spacing between the sorting plates 13. There is a certain gap between the sorting plates 13 and the baffle. Then the pneumatic clamp 11 reaches the baffle to clamp the wire harnesses and places them one by one onto the snap-fit assembly 3. After one side of the snap-fit assembly 3 is full, the heating assembly 4 heats and thermoforms the wire harnesses at that point under the drive of the dual-axis module. At this time, the pneumatic clamp 11 can secure the wire harness to the snap-fit assembly 3 on the other side.
[0020] The lower part of the vibrating plate 8 is provided with two support plates spaced apart. Two sliders 15 are installed on the lower part of the support plates. The side plate is mounted on the loading rack 16, and two guide rods 17 are installed on the loading rack 16. The guide rods 17 pass through the sliders 15 and are slidably connected to them. The sliders 15 have two guide rod holes that mate with the guide rails. The guide rods 17 pass through these holes and are slidably connected to them. The direction of the guide rods 17 is consistent with the reciprocating linear motion direction of the vibrating plate 8.
[0021] A slider connecting frame 18 connects the two sliders 15. A connecting rod 19 is rotatably connected to the lower part of the slider connecting frame 18. A drive rod is rotatably connected to the free end of the connecting rod 19. A drive motor 23 is installed on the feeding frame 16. The output shaft of the drive motor 23 is fixedly connected to the free end of the drive rod. The drive motor 23 drives the drive rod to rotate, which in turn causes the connecting rod 19 to swing. The swinging of the connecting rod 19 causes the slider connecting frame 18 to move linearly, which in turn causes the vibrating plate 8 to reciprocate linearly.
[0022] A slider connecting frame 18 is connected between the two sliders 15. A connecting rod 19 is rotatably connected to the lower part of the slider connecting frame 18. A rotating pin 20 is connected to the free end of the connecting rod 19. A first drive rod 21 is installed at the other end of the rotating pin 20. A second drive rod 22 is rotatably connected to the free end of the first drive rod 21. A drive motor 23 is installed on the feeding frame 16. A drive shaft is coaxially fixedly connected to the output shaft of the drive motor 23. The drive shaft is fixedly connected to the free end of the second drive rod 22. A first threaded hole is provided in the middle of the transmission pin. A second threaded hole is provided at the end of the drive shaft. A screw 24 is spirally connected in the first threaded hole and the second threaded hole. The distance between the first and second threaded holes can be adjusted by screw 24 to control the movement amplitude of the vibrating plate 8, which can accommodate wire harnesses of different diameters. The linear reciprocating motion stroke of the vibrating plate 8 can be adjusted according to the different diameter wire harnesses to ensure that wire harnesses of different diameters can smoothly enter the conveying mechanism 5 one by one from between the vibrating plate 8 and the inclined guard plate 10, thus ensuring the stability of the feeding mechanism 7 and preventing wire harness blockage.
[0023] The threads of the first threaded hole and the second threaded hole have opposite helical directions and the same pitch. By rotating the threads, the distance between the second drive rod 22 and the second drive rod 22 can be adjusted online without disassembling the first drive rod 21 and the second drive rod 22. By adjusting the first drive rod 21 and the second drive rod 22, the distance between the first threaded hole and the second threaded hole changes, which is equivalent to adjusting the effective drive radius of the drive rod, thus achieving the conditions for driving the reciprocating linear motion stroke of the vibration plate 8.
[0024] The conveying mechanism 5 includes a lower conveying component and an upper conveying component, which are spaced apart. The lower conveying component includes a drive shaft and a driven shaft, with two symmetrically spaced lower conveyor belts between the drive shaft and the driven shaft. The drive shaft is connected to a drive motor 23. The upper conveying component includes two spaced upper rotating shafts, with two symmetrically spaced upper conveyor belts between the two upper rotating shafts. The lower conveying component provides the driving force for the movement of the wire harness, while the upper conveying component provides a certain pre-compression force for the wire harness conveying to prevent the wire harness from deflecting during the conveying process.
[0025] The upper conveying mechanism 5 is equipped with a conveyor frame 25, on which a drive shaft is mounted. A drive gear 27 is mounted on the drive shaft. A front rack 29 is mounted at one end of the drive gear 27, and a rear rack 28 is mounted at the other end. A front baffle 30 is mounted at the lower end of the front rack 29, and a rear baffle 31 is mounted at the lower part of the rear rack 28. Both the front baffle 30 and the rear baffle 31 pass downwards through the gap between the two upper conveyor belts. The drive shaft is connected to a separating drive motor 23 mounted on the conveyor frame 25. The separating drive motor 23 drives the drive gear 27 to rotate, which in turn drives the front baffle 30 and the rear baffle 31 to move up and down at intervals, thereby enabling the wire harnesses to enter the sorting mechanism 6 one by one from the conveying mechanism 5. The drive gear 27 drives the front rack 29 and the rear rack 28 to move. There are three positions: upper, middle and lower. When in the lower position, the front rack 29 is higher than the rear rack 28. At this time, the wire harness can pass through the front baffle 30 but is blocked by the rear baffle 31. When in the middle position, the front baffle 30 and the rear baffle 31 are at the same height. The wire harness cannot pass through the front baffle 30 and the rear baffle 31. When in the lower position, the wire harness can pass through the rear baffle 31 but cannot pass through the front baffle 30. The distance between the front baffle 30 and the rear baffle 31 is greater than the diameter of one wire harness but less than the diameter of two wire harnesses. The separator drive motor 23 drives the drive gear 27, initially in the upper station, where a wire harness enters between the front baffle 30 and the rear baffle 31. It then enters the middle station, where the front baffle 30 and rear baffle 31 restrict the wire harness's movement. Next, it enters the lower station, where the wire harness located between the front baffle 30 and the rear baffle 31 passes through the rear baffle 31 and enters the next process. Then, the separator drive motor 23 rotates, driving the front baffle 30 and rear baffle 31 back to the middle station, completing the wire harness transport cycle.
[0026] The pneumatic clamp 11 is a flexible pneumatic clamp 11 jaw, including a jaw frame with two flexible jaws. The flexible jaws are made of an elastomer material and have a sealed cavity inside. They employ a pneumatic flexible finger structure to form an expandable / contractable cavity. Grabbing and releasing are achieved by inflating the internal cavity with air to expand and deform the jaws, or by vacuuming them. Inflation: Compressed air enters the internal cavity of the jaws, causing the cavity to expand and deform. Enveloping grip: The jaws do not simply clamp, but deform to envelop the outline of the object, changing point contact into large-area surface contact. Uniform force distribution: The gripping force is evenly distributed through the flexible material, avoiding excessive local pressure that could damage the workpiece. The snap-fit assembly 3 includes a snap-fit plate with snap-fit slots for placing wire harnesses, with one wire harness placed in each slot.
[0027] The beneficial effects of this invention are as follows: Orderly feeding and reliable single-wire separation: The feeding mechanism 7 uses an inclined vibrating plate 8, with side guard plates 9 and inclined guard plates 10 on both sides. Through the reciprocating linear motion of the vibrating plate 8 and the coordination of the inclined direction, the wire harnesses are output one by one from the gap between the vibrating plate 8 and the inclined guard plate 10 under the action of gravity and vibration. Simultaneously, the gradually decreasing spacing between the inclined guard plate 10 and the vibrating plate 8 ensures that only one wire harness is output at a time, preventing stacking and jamming. Good conveying and sorting orientation and high positioning accuracy: The conveying mechanism 5 adopts an upper and lower double conveyor belt structure (the lower conveying component of the drive shaft + driven shaft provides the driving force, and the upper conveying component of the upper rotating shaft + upper rotating shaft provides the pre-clamping force), which can effectively prevent the wire harnesses from deflecting during conveying. The sorting mechanism 6 uses sorting plates 13 with gradually decreasing spacing on both sides and sorting baffles 14, in conjunction with pneumatic clamps 11, to accurately grasp and place each wire harness, ensuring accurate and reliable positioning. Uniform heating and good quality consistency: The dual-axis linear module 33 drives the heating component 4 along... The sorting mechanism 6 moves along the vertical and horizontal planes, enabling stable and uniform heating and thermoforming of the wire harnesses clamped on the snap-fit assembly 3. This avoids defects such as uneven thickness, bubbles, or burns that are prone to occur during manual heating, significantly improving product consistency. It has good adaptability to wire harnesses of different diameters. By adjusting the distance between the first and second threaded holes through the screw 24, the effective driving radius of the drive rod is effectively changed, thereby adjusting the reciprocating linear motion stroke of the vibrating plate 8. This allows the same equipment to be used for wire harnesses of different diameter ranges, preventing material blockage and ensuring stable material feeding. The loading and unloading rhythm is coordinated, allowing for continuous operation. The partition drive motor 23 drives the drive gear 27 to rotate, causing the front baffle 30 and the rear baffle 31 to move up and down at intervals, enabling the wire harnesses to enter the sorting mechanism 6 one by one from the conveying mechanism 5. When one snap-fit assembly 3 is being thermoformed, the pneumatic clamp 11 can place the wire harness on the other snap-fit assembly 3, realizing a parallel operation mode of "processing and feeding at the same time," further improving the overall output rhythm of the equipment.
[0028] The embodiments described above are not intended to limit the scope of the present invention. Any modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the inventive concept should be included within the scope of protection defined by the claims of the present invention.
Claims
1. A heating device for a thermoplastic tube of a wire harness terminal, comprising a thermoplastic device, the thermoplastic device comprising a mounting platform (1), two suction components (2) spaced apart on the mounting platform (1), and a snap-fit component (3) on one side of each suction component (2), characterized in that, A dual-axis linear module (33) is installed on the mounting platform (1), and a heating component (4) is installed on the dual-axis linear module. A conveying mechanism (5) is provided on one side of the mounting platform (1), and a sorting mechanism (6) is provided at the lower part of the conveying mechanism (5). A feeding mechanism (7) is provided at the end of the conveying mechanism (5) away from the sorting mechanism (6). A shaking plate (8) is inclined and provided on both sides of the shaking plate (8). An inclined guard plate (10) is provided on the upper part of the two side guard plates (9). The inclined guard plate (10) and the shaking plate (8) are connected. The tilting direction is consistent. A linear reciprocating drive mechanism is installed at the lower part of the shaking plate (8). A three-axis linear module (32) is installed on the mounting platform (1). A pneumatic clamp (11) is installed on the three-axis linear module (32). The sorting mechanism (6) includes a belt conveyor (12). The belt conveyor (12) is provided with sorting plates (13) on both sides. The distance between the two sorting plates (13) gradually decreases in the direction towards the mounting platform (1). A sorting baffle (14) is provided on the side of the sorting plate (13) facing the mounting platform (1).
2. The heating device for the thermoplastic tube of the wire harness terminal according to claim 1, characterized in that, The lower part of the shaking plate (8) is provided with two support plates spaced apart. Two sliders (15) are installed on the lower part of the support plates. The side plate is installed on the feeding rack (16). Two guide rods (17) are installed on the feeding rack (16). The guide rods (17) pass through the sliders (15) and are slidably connected to the sliders (15).
3. The heating device for the thermoplastic tube of the wire harness terminal according to claim 2, characterized in that, A slider connecting frame (18) is connected between the two sliders (15). A connecting rod (19) is rotatably connected to the lower part of the slider connecting frame (18). A drive rod is rotatably connected to the free end of the connecting rod (19). A drive motor (23) is installed on the feeding rack (16). The output shaft of the drive motor (23) is fixedly connected to the free end of the drive rod.
4. The heating device for the thermoplastic tube of the wire harness terminal according to claim 2, characterized in that, A slider connecting frame (18) is connected between the two sliders (15). A connecting rod (19) is rotatably connected to the lower part of the slider connecting frame (18). A rotating pin (20) is connected to the free end of the connecting rod (19). A first driving rod (21) is installed at the other end of the rotating pin (20). A second driving rod (22) is rotatably connected to the free end of the first driving rod (21). A drive motor (23) is installed on the feeding rack (16). A drive shaft is coaxially fixedly connected to the output shaft of the drive motor (23). The drive shaft is fixedly connected to the free end of the second driving rod (22). A first threaded hole is provided in the middle of the transmission pin. A second threaded hole is provided at the end of the drive shaft. A screw (24) is spirally connected in the first threaded hole and the second threaded hole.
5. The heating device for the thermoplastic tube of the wire harness terminal according to claim 4, characterized in that, The threads of the first threaded hole and the second threaded hole have opposite helical directions and the same pitch.
6. The heating device for the thermoplastic tube of the wire harness terminal according to claim 1, characterized in that, The conveying mechanism (5) includes a lower conveying component and an upper conveying component, which are spaced apart. The lower conveying component includes a drive shaft and a driven shaft. Two symmetrically spaced lower conveyor belts are provided between the drive shaft and the driven shaft. The drive shaft is connected to a drive motor (23). The upper conveying component includes two spaced upper rotating shafts. Two upper conveyor belts are symmetrically spaced between the two upper rotating shafts.
7. The heating device for the thermoplastic tube of the wire harness terminal according to claim 6, characterized in that, The upper conveying mechanism (5) is provided with a conveying frame (25) on the upper part. A drive shaft is installed on the conveying frame (25). A drive gear (27) is installed on the drive shaft. A front rack (29) is installed at one end of the drive gear (27), and a rear rack (28) is installed at the other end. A front baffle (30) is installed at the lower end of the front rack (29), and a rear baffle (31) is installed at the lower part of the rear rack (28). Both the front baffle (30) and the rear baffle (31) pass downward through the gap between the two upper conveyor belts. The drive shaft is connected to a separator drive motor (23) installed on the conveying frame (25).