Terminal heat shrink tube processing equipment

Abstract

The invention discloses terminal heat shrink tube processing equipment, and relates to the technical field of wire harness sleeves. The device comprises a shell with a heating chamber, a first wire harness inlet and a first wire harness outlet are formed in the two ends of the shell respectively, a first guide channel enabling the first wire harness inlet and the first wire harness outlet to be communicated is arranged in the shell, and a heat conduction through hole is formed in the part, located in the heating chamber, of the first guide channel; the ratio of the total opening area to the non-opening area of the heat conduction through holes in the front part of the first guide channel is greater than the ratio of the total opening area to the non-opening area of the heat conduction through holes in the rear part of the first guide channel; and a wire harness propelling mechanism is arranged at the preorder position of the first wire harness inlet. The heating chamber is arranged, a heating medium can be restrained in the heating chamber to conduct thermal shrinkage treatment on a thermal shrinkage pipe, the first guide channel is arranged in the heating chamber, the upper portion and the lower portion of the first guide channel are each provided with a heat conduction through hole, and when a wire harness connected with the thermal shrinkage pipe in a sleeving mode enters the first guide channel, rapid shrinkage can be achieved, and the thermal shrinkage pipe is attached to the wire harness or a terminal.

Description

Technical Field

[0001] The present invention relates to a terminal heat shrink tube processing device, belonging to the technical field of wire harness sleeves. Background Art

[0002] At present, when processing wire harness connectors, the wire harness needs to be processed. The processing work includes installing terminals on the wire harness and fixing the terminals with heat shrink tube sleeves; or covering the heat shrink sleeve on the outer periphery of the wire harness to protect and fix the wire harness. A heat shrink device is required during the processing. There is an existing wire harness automatic tube sleeve baking device disclosed in CN114290659A. In this device, a heating blowpipe is used to heat the tube sleeve inside the tube sleeve accommodating cavity so that it shrinks onto the wire harness. However, the heating blowpipe only heats the tube sleeve in one direction, resulting in uneven heating of the tube sleeve. The tube sleeve will form wrinkles and twists on the wire harness. Due to uneven heating, the air between the tube sleeve and the wire harness is not easily discharged, resulting in gas residue and uneven heat shrinkage of the tube sleeve. Summary of the Invention

[0003] The purpose of the present invention is to design a terminal heat shrink tube processing device that can uniformly heat the heat shrink tube sleeve.

[0004] The present invention includes a housing with a heating chamber. At both ends of the housing, a first wire harness inlet and a first wire harness outlet are respectively provided. A first guiding channel that connects the first wire harness inlet and the first wire harness outlet is arranged inside the housing. The part of the first guiding channel located in the heating chamber is provided with heat conduction through holes. On the first guiding channel, the ratio of the total opening area to the non-opening area of the heat conduction through holes in the front part is greater than the ratio of the total opening area to the non-opening area of the heat conduction through holes in the rear part. A wire harness propulsion mechanism is arranged at the pre-position of the first wire harness inlet.

[0005] Furthermore, a pre-guiding mechanism is arranged at the pre-position of the first wire harness inlet, or a post-guiding mechanism is arranged at the post-position of the first wire harness outlet. The pre-guiding mechanism or the post-guiding mechanism includes a guiding bracket. An upper guiding wheel and a lower guiding wheel are oppositely installed on the guiding bracket. The two ends of the shaft of the lower guiding wheel are rotatably installed on the guiding bracket, and its shaft is connected to a guiding motor. The shaft of the upper guiding wheel is installed on a longitudinal guiding rod. A spring is arranged between the longitudinal guiding rod and the upper plate surface of the guiding bracket. An adjusting nut is screwed on the part of the longitudinal guiding rod located above the guiding bracket. The upper end of the lower guiding wheel of the pre-guiding mechanism corresponds to the lower end or the lower part position of the first wire harness inlet.

[0006] Furthermore, an upper roller group and a lower roller group are arranged in the guiding channel. The upper roller group and the lower roller group are respectively arranged along the length direction of the guiding channel. Each roller group is composed of a group of rollers facing the center line of the guiding channel. The upper end of the lower guiding wheel of the guiding mechanism at the pre-position of the first wire harness inlet corresponds to the upper end position of the lower roller group.

[0007] Furthermore, a cooling chamber is arranged on one side of the first wire harness outlet. A second guiding channel composed of a porous pipe is arranged in the cooling chamber. The front end of the second guiding channel is the second wire harness inlet, and its end is the second wire harness outlet. The second wire harness inlet corresponds to the position of the first wire harness outlet. The subsequent guiding mechanism is arranged at the subsequent position of the second wire harness outlet.

[0008] Furthermore, an exhaust mechanism is arranged between the heating chamber and the cooling chamber. The exhaust mechanism includes a group of suspended elastic pieces arranged circumferentially along the first wire harness outlet, with one end fixed on the outer wall of the housing and the other end radiating to the corresponding position in the middle of the first wire harness outlet.

[0009] Furthermore, a previous guiding mechanism is arranged at the previous position of the first wire harness inlet. The guiding motor of its lower guiding wheel is the previous guiding motor. A subsequent guiding mechanism is arranged at the subsequent position of the first wire harness outlet. The guiding motor of its lower guiding wheel is the subsequent guiding motor. A previous photoelectric switch for controlling the previous guiding motor is arranged at the previous position of the previous guiding mechanism. A subsequent photoelectric switch for controlling the subsequent guiding motor is arranged at the previous position of the subsequent guiding mechanism. The control steps are as follows: (1) The previous switch starts the previous guiding motor; (2) The subsequent photoelectric switch starts the subsequent guiding motor. At this time, the previous guiding motor is turned off after a delay, and the delay is determined by the distance from the subsequent photoelectric switch to the subsequent guiding mechanism and the rotation speed of the previous guiding motor. The previous guiding motor and the subsequent guiding motor are in the offline state when they are turned off.

[0010] Furthermore, the first wire harness inlet, the first guiding channel, and the first wire harness outlet respectively include their upper arc surfaces and lower arc surfaces. First guiding grooves are arranged between the upper arc surface and the lower arc surface and between the adjacent end faces.

[0011] Furthermore, a cooling chamber is arranged on one side of the first wire harness outlet. A second guiding channel composed of a porous pipe is arranged in the cooling chamber. The front end of the second guiding channel is the second wire harness inlet, and its end is the second wire harness outlet. The second wire harness inlet corresponds to the position of the first wire harness outlet.

[0012] Furthermore, an exhaust mechanism is arranged between the heating chamber and the cooling chamber. The exhaust mechanism includes a group of suspended elastic pieces arranged circumferentially along the first wire harness outlet, with one end fixed on the outer wall of the housing and the other end radiating to the corresponding position in the middle of the first wire harness outlet.

[0013] In the present invention, a heating chamber is provided, which can confine the heat medium in the heating chamber to perform heat shrinking treatment on the heat shrinkable tube, enabling the heat shrinkable tube to be uniformly heated during the heat shrinking process; a first guiding channel is provided in the heating chamber, and heat conducting through holes are provided in both the upper and lower parts of the first guiding channel. The opening area of the front part of the heat conducting through hole is larger than that of the rear part, so that the gas flowability of the front part of the first guiding channel is good. When the wire harness sleeved with the heat shrinkable tube enters the first guiding channel, it will quickly contract, causing the heat shrinkable tube to fit with the wire harness or terminal. At this time, the wire harness and the heat shrinkable tube that have not entered the heating chamber are in a separated state, and the gas in the tube sleeve is squeezed into the unshrunk heat shrinkable tube, reducing the gas residue between the tube sleeve and the wire harness after heat shrinking; the heat shrinkable tube then passes through the rear part of the first guiding channel for overall heating, and the uniform and gentle heating process at the rear can increase the fitting effect between the heat shrinkable tube and the wire harness.

[0014] An exhaust structure is provided in the present invention. The uncooled heat shrinkable tube after heat shrinking is scraped by a suspended elastic piece to further discharge the gas between the heat shrinkable tube and the wire harness, avoiding the phenomenon of uneven surface of the heat shrinkable tube after cooling caused by gas residue. Brief Description of the Drawings

[0015] Figure 1 is the front view of the embodiment of the present invention; Figure 2 is Figure 1 the schematic structural diagram of the interior of the outer shell in Figure 3 is Figure 2 the partial enlarged view of part A in Figure 4 is Figure 2 the partial enlarged view of part B in Figure 5 is Figure 2 the cross-sectional view in the C-C direction in Figure 6 is Figure 2 the partial enlarged view of part D in Figure 7 is Figure 2 the left view of the suspended elastic piece in Figure 8 is the left view of the embodiment of the present invention; Figure 9 is Figure 8 the schematic structural diagram of the front guiding mechanism part in Wherein: 1. Outer shell; 2. Heating chamber; 3. First wire harness inlet; 4. First wire harness outlet; 5. First guiding channel; 6. Heat conduction through hole; 7. Upper roller set; 8. Lower roller set; 9. First guiding groove; 10. Preceding guiding mechanism; 11. Guiding bracket; 12. Lower guiding wheel; 13. Preceding guiding motor; 14. Longitudinal guiding rod; 15. Adjusting nut; 16. Spring; 17. Upper guiding wheel; 18. First wind hood; 19. Reduction motor; 20. First fan; 21. Heating pipe; 22. Suspended elastic sheet; 23. Cooling chamber; 24. Second wire harness inlet; 25. Second wire harness outlet; 26. Second guiding groove; 27. Second guiding channel; 28. Second wind hood; 29. Second fan; 30. Transmission belt; 31. Succeeding guiding mechanism; 32. Preceding photoelectric switch; 33. Succeeding photoelectric switch. Detailed implementation mode

[0016] Taking Figure 1 the left inlet end in the middle as the preceding direction of this embodiment and the right outlet end as the succeeding direction of this embodiment. Taking Figure 1 to define the up-down, left-right, front-back directions of this embodiment.

[0017] As shown in the figure, this embodiment includes a housing 1. A heating chamber 2 is arranged in the inner cavity of the housing 1, and the heating chamber 2 is fixedly connected to the inner wall of the housing 1. A first wire harness inlet 3 and a first wire harness outlet 4 are respectively arranged at the left and right ends of the housing 1. The first wire harness inlet 3 and the first wire harness outlet 4 penetrate through the housing 1 and the heating chamber 2 and communicate with the inner cavity of the heating chamber 2. In this embodiment, three groups of the first wire harness inlet 3 and the first wire harness outlet 4 are provided, enabling the device to process three wire harnesses simultaneously. A first guiding channel 5 is arranged in the heating chamber 2. In this embodiment, three first guiding channels 5 are provided. The left and right ends of each first guiding channel 5 are fixedly connected to the inner wall of the heating chamber 2 and are respectively communicated with each first wire harness inlet 3 and the first wire harness outlet 4. The first wire harness inlet 3, the first guiding channel 5, and the first wire harness outlet 4 respectively include an upper arc surface and a lower arc surface. A first guiding groove 9 is arranged between the upper arc surface and the lower arc surface and the inner wall of the heating chamber 2 adjacent to the front and rear ends. Among them, the upper and lower arc surfaces of the first guiding channel 5 are composed of its upper and lower arc plates. Based on the fact that the terminal connecting the wire harness is basically flat and protrudes from the wire harness, when the wire harness is conveyed through the first guiding channel 9, by arranging the first guiding groove 9, it is convenient for the terminal to pass through, and the first guiding grooves 9 protruding forward and backward can play a role in limiting and guiding the terminal, preventing the wire harness from rotating and twisting during the conveying process and affecting the processing quality. The part of the first guiding channel 5 located in the inner cavity of the heating chamber 2 is provided with heat conduction through holes 6. The ratio of the total opening area to the non-opening area of the heat conduction through holes 6 in the front part of the first guiding channel 5 is greater than the ratio of the total opening area to the non-opening area of the heat conduction through holes 6 in the rear part of the first guiding channel 5. In this embodiment, the aperture of the heat conduction through holes 6 in the front part of the first guiding channel 5 is larger than the aperture of the heat conduction through holes 6 in the rear part of the first guiding channel 5. Also, the ratio of the total opening area to the non-opening area of the heat conduction through holes 6 in the front part of the first guiding channel 5 can be increased by increasing the opening density of the heat conduction through holes 6 in the front part of the first guiding channel 5. An upper roller group 7 is arranged in the first guiding channel 5, and a lower roller group 8 corresponding in position is arranged below the upper roller group 7. The upper roller group 7 and the lower roller group 8 are respectively arranged along the length direction of the first guiding channel 5. In the two roller groups, each roller faces the center line of the first guiding channel 5, and the bases of each roller are respectively fixedly connected to the upper and lower arc plates of the first guiding channel 5, capable of supporting and conveying the wire harness through the rollers.

[0018] A wire harness propulsion mechanism is provided at the pre - order position of each first wire harness inlet 3. In this embodiment, the pre - order position of the first wire harness inlet 3 is set as the pre - order guiding mechanism 10. The pre - order guiding mechanism 10 includes a guiding bracket 11. The right end face of the guiding bracket 11 is fixedly connected to the housing 1. Inside it, there is a lower guiding wheel 12. The front and rear ends of the shaft of the lower guiding wheel 12 are rotatably mounted on the guiding bracket 11. There is a pre - order guiding motor 13 arranged on the front side of the lower guiding wheel 12. The pre - order guiding motor 13 is fixedly connected to the guiding bracket 11, and its rotating shaft passes through the guiding bracket 11 and is connected to the shaft of the lower guiding wheel 12. When in use, driving the pre - order guiding motor 13 can control the rotation of the lower guiding wheel 12. In this embodiment, the upper end of the lower guiding wheel 12 corresponds to the upper end of the lower roller group 8, which is convenient for the conveyance of the wire harness. There is a longitudinal guide rod 14 arranged on the upper plate surface of the guiding bracket 11. The longitudinal guide rod 14 passes through the upper plate surface of the guiding bracket 11 and is movably connected thereto. There is an upper guiding wheel 17 arranged at the lower end of the longitudinal guide rod 14. The shaft of the upper guiding wheel 17 is rotatably connected to the longitudinal guide rod 14, and its position corresponds to that of the lower guiding wheel 12, and it can cooperate with the lower guiding wheel 12 to convey the wire harness. A spring 16 is arranged between the lower part of the longitudinal guide rod 14 and the upper plate surface of the guiding bracket 11, which can make the upper guiding wheel 17 fit the surface of the wire harness. The upper outer periphery of the longitudinal guide rod 14 is provided with threads, and an adjusting nut 15 is screwed on the part above the guiding bracket 11. When in use, by rotating the adjusting nut, the position of the upper guiding wheel 17 at the lower end of the longitudinal guide rod 14 can be controlled, avoiding the phenomenon that the spring 16 is over - compressed due to the too - close distance between the upper guiding wheel 17 and the wire harness, or the upper guiding wheel 17 cannot contact the wire harness due to the too - far distance. In this embodiment, the position of the lower guiding wheel 12 corresponds to that of the first wire harness inlet 3 to ensure that the wire harness enters the first wire harness inlet 3.

[0019] There is a first air hood 18 arranged above the housing 1. The lower end of the first air hood 18 is fixedly connected to the upper surface of the housing 1. There is a through - hole opened at the lower end of the first air hood 18, making the inner cavity of the first air hood 18 communicate with the inner cavity of the heating chamber 2. There is a partition arranged in the upper part of the inner cavity of the first air hood 18, and a reduction motor 19 is fixedly installed at the upper end of the partition. The rotating shaft of the reduction motor 19 passes through the partition downward and is provided with a first fan 20. When in use, starting the reduction motor 19 can control the rotation of the first fan 20 to convey gas into the heating chamber 2. There is a heating tube 21 arranged below the first fan 20, which can heat the gas in the first air hood 18. In this embodiment, through - holes are opened on the outer periphery of the partition in the upper part of the inner cavity of the first air hood 18 to facilitate the passage of gas; the upper end face of the first air hood 18 adopts a mesh structure, which plays a role in dust - proof protection for the reduction motor 19.

[0020] On the right side of the first wire harness outlet 4, there is a cooling chamber 23, and the left end face of the cooling chamber 23 is fixedly connected to the housing 1. Inside the cooling chamber 23, there is a second guiding channel 27. In this embodiment, three second guiding channels 27 are provided, and each second guiding channel 27 penetrates through the cooling chamber 23 and is fixedly connected to the cooling chamber 23. Each second guiding channel 27 is in the shape of a porous tube, its front-end port is the second wire harness inlet 24, and its rear-end port is the second wire harness outlet 25. The positions of the second wire harness inlets 24 correspond to those of the first wire harness outlet 4 respectively for receiving the wire harness. The upper roller group 7 and the lower roller group 8 extend into the second guiding channel 27 for supporting and conveying the wire harness. On the front and rear sides of the second guiding channel 27, there are second guiding grooves 26. The second guiding grooves 26 have the same shape as the first guiding grooves 9 and are used for passing the terminals installed on the wire harness. At the subsequent position of the second wire harness outlet 25, there is a subsequent guiding mechanism 31. In this embodiment, the subsequent guiding mechanism 31 has the same structure as the previous guiding mechanism 10 and will not be elaborated here. At the upper end of the cooling chamber 23, there is a second air hood 28. A through hole is opened at the lower end of the second air hood 28 to connect the interior of the second air hood 28 with the interior of the cooling chamber 23. Inside the second air hood 28, there is a second fan 29. The rotating shaft of the second fan 29 passes through the upper plate surface of the second air hood 28 and extends upward. The rotating shaft is rotationally connected to the upper plate surface of the second air hood 28 through a bearing to support the second fan 29. At the upper part of the rotating shaft of the second fan 29, there is a transmission belt 30. The left and right ends of the transmission belt 30 are respectively connected to the rotating shafts of the first fan 20 and the second fan 29 through pulley structures. When in use, the second fan 29 can rotate with the first fan 20. In this embodiment, the upper plate surface of the second air hood 28 is a porous plate structure to allow the gas in the second air hood 28 to flow through.

[0021] An exhaust mechanism is provided between the heating chamber 2 and the cooling chamber 23. The exhaust mechanism includes a group of suspended elastic pieces 22 arranged circumferentially around the first wire harness outlet 4. In this embodiment, three groups of suspended elastic pieces 22 are provided. Two suspended elastic pieces 22 are symmetrically arranged at each first wire harness outlet 4. The left end of the suspended elastic piece 22 is fixedly connected to the outer wall of the housing 1, and the right end radiates to the corresponding position in the middle of the first wire harness outlet 4. When in use, each suspended elastic piece 22 can scrape the heat shrinkable tube outside the wire harness through the elastic piece structure at its right end to further exhaust the gas between the heat shrinkable tube and the wire harness. When the suspended elastic piece 22 conveys the wire harness, the elastic piece part at its right end can penetrate into the second wire harness inlet 24 under the action of the movement of the wire harness. At this time, it can play a guiding role for the wire harness. Since the suspended elastic piece 22 adopts a thin plate structure, when it contacts the heat shrinkable tube, the right end of the suspended elastic piece will expand outward and fit in contact with the outer surface of the heat shrinkable tube, without causing any hindrance to the conveyance of the wire harness and the heat shrinkable sleeve.

[0022] A pre-sequence photoelectric switch 32 is provided at the pre-sequence position of the pre-sequence guiding mechanism 10. The pre-sequence photoelectric switch 32 is electrically connected to the pre-sequence guiding motor 13 and can control the start and stop of the pre-sequence guiding motor 13. The guiding motor of the lower guiding wheel in the post-sequence guiding mechanism 31 is the post-sequence guiding motor. A post-sequence photoelectric switch 33 is provided at the pre-sequence position of the post-sequence guiding mechanism 31. The post-sequence photoelectric switch 33 is electrically connected to the post-sequence guiding motor and can control the start and stop of the post-sequence guiding motor. In this embodiment, the pre-sequence photoelectric switch 32 and the post-sequence photoelectric switch 33 are signal-connected. When in use, when the pre-sequence photoelectric switch 32 detects the wire harness, it controls the pre-sequence guiding motor 13 to start, and conveys the wire harness through the pre-sequence guiding mechanism 10. When the post-sequence photoelectric switch 33 detects the wire harness, the pre-sequence guiding switch 32 controls the pre-sequence guiding motor 13 to close after a delay, so that the pre-sequence guiding motor 13 is in an offline state and the rotating shaft can rotate freely; and controls the post-sequence guiding motor to start conveying the wire harness. The delay interval is determined by the distance from the post-sequence photoelectric switch 33 to the lower guiding wheel in the post-sequence guiding mechanism 31 and the rotation speed of the pre-sequence guiding motor 13. Dragging the wire harness through the post-sequence guiding mechanism 31 can prevent the wire harness from bending in the guiding channel and ensure the smoothness of the processing process. The delayed shutdown of the pre-sequence guiding motor 13 can ensure that the wire harness is conveyed into the post-sequence guiding mechanism 31.

[0023] In this embodiment, the guiding motors in the pre-sequence guiding mechanism 10 and the post-sequence guiding mechanism 31 rotate slowly to ensure the heat-shrinking effect on the heat-shrinkable sleeve; when the wire harness is distorted in the first guiding channel 5, each lower roller and the lower guiding wheel will slip on the surface of the wire harness, so that the wire harness returns to its original state and continues to be conveyed, ensuring the smoothness of the wire harness conveying process.

[0024] When this embodiment is in use, first start the reduction motor 19, and convey the heated gas into the heating chamber 2 through the first fan 20; at the same time, control the second fan 20 to rotate through the transmission belt 30 to convey gas into the cooling chamber 23. Then place the wire harness sleeved with the heat shrinkable tube into the first wire harness inlet 3. If there are terminals on the wire harness, align the terminals with the first guide groove 9. At this time, the previous photoelectric switch 32 detects the wire harness, and the previous guiding motor 13 starts to convey the wire harness into the first guiding channel 5. When the wire harness enters the previous part of the first guiding channel 5, the heat shrinkable sleeve is heated and shrinks rapidly, fitting with the wire harness and the terminals. Then, the wire harness is integrally heated through the subsequent part of the first guiding channel 5. The uniform and gentle heating process of the subsequent part can increase the fitting effect between the heat shrinkable tube and the wire harness. The heat-shrunk wire harness is conveyed to the exhaust mechanism, and the heat shrinkable tube is scraped and exhausted through the suspended elastic piece 22. After exhausting, the wire harness enters the cooling chamber 23, is cooled by the airflow blown by the second fan 29, and is conveyed to the subsequent guiding mechanism 31. After the subsequent photoelectric switch 33 detects the wire harness, the previous guiding switch 32 controls the previous guiding motor 13 to close after a delay, making the previous guiding motor 13 in an offline state, and the rotating shaft can rotate freely; and controls the subsequent guiding motor to start, dragging and conveying the wire harness until the whole wire harness is sent out by the subsequent guiding mechanism 31.

[0025] This embodiment can perform heat shrinkage treatment on the wire harness with terminals and heat shrinkable tubes sleeved at both ends, and after heat shrinkage, it is sent out by the subsequent guiding mechanism 31.

Claims

1. A terminal heat shrinkable tube processing device, characterized in that: It includes a housing with a heating chamber. At both ends of the housing, a first wire harness inlet and a first wire harness outlet are respectively arranged. Inside the housing, a first guiding channel that connects the first wire harness inlet and the first wire harness outlet is arranged. The part of the first guiding channel located inside the heating chamber is provided with heat-conducting through holes; on the first guiding channel, the ratio of the total opening area to the non-opening area of the heat-conducting through holes in its front part is greater than the ratio of the total opening area to the non-opening area of the heat-conducting through holes in its rear part; a wire harness propulsion mechanism is arranged at the pre-position of the first wire harness inlet.

2. The terminal heat-shrinkable tube processing equipment according to claim 1, characterized in that: A pre-guiding mechanism is arranged at the pre-position of the first wire harness inlet, or a post-guiding mechanism is arranged at the post-position of the first wire harness outlet; the pre-guiding mechanism or the post-guiding mechanism includes a guiding bracket. On the guiding bracket, an upper guiding wheel and a lower guiding wheel are oppositely installed. The two ends of the shaft of the lower guiding wheel are rotatably installed on the guiding bracket, and its shaft is connected to a guiding motor; the shaft of the upper guiding wheel is installed on a longitudinal guide rod. A spring is arranged between the longitudinal guide rod and the upper plate surface of the guiding bracket; an adjusting nut is screwed on the part of the longitudinal guide rod located above the guiding bracket; the upper end of the lower guiding wheel of the pre-guiding mechanism corresponds to the lower end or the lower part position of the first wire harness inlet.

3. The terminal heat shrinkable tube processing equipment according to claim 2, characterized in that: An upper roller group and a lower roller group are arranged in the guiding channel. The upper roller group and the lower roller group are respectively arranged along the length direction of the guiding channel. Each roller group is composed of a group of rollers facing the center line of the guiding channel. The upper end of the lower guiding wheel of the guiding mechanism at the pre-position of the first wire harness inlet corresponds to the upper end position of the lower roller group.

4. The terminal heat-shrinkable tube processing equipment according to claim 2, characterized in that: A cooling chamber is arranged on one side of the first wire harness outlet. Inside the cooling chamber, a second guiding channel composed of a porous pipe is arranged. The front end of the second guiding channel is a second wire harness inlet, and its end is a second wire harness outlet. The second wire harness inlet corresponds to the position of the first wire harness outlet. The post-guiding mechanism is arranged at the post-position of the second wire harness outlet.

5. The terminal heat-shrinkable tube processing equipment according to claim 4, characterized in that: An exhaust mechanism is arranged between the heating chamber and the cooling chamber. The exhaust mechanism includes a group of suspension elastic pieces arranged along the circumference of the first wire harness outlet, with one end fixed on the outer wall of the housing and the other end radiating to the corresponding position in the middle of the first wire harness outlet.

6. The terminal heat-shrinkable tube processing equipment according to any one of claims 2 to 5, characterized in that: A pre-guiding mechanism is arranged at the pre-position of the first wire harness inlet. The guiding motor of its lower guiding wheel is a pre-guiding motor. A post-guiding mechanism is arranged at the post-position of the first wire harness outlet. The guiding motor of its lower guiding wheel is a post-guiding motor; a pre-photoelectric switch for controlling the pre-guiding motor is arranged at the pre-position of the pre-guiding mechanism, and a post-photoelectric switch for controlling the post-guiding motor is arranged at the pre-position of the post-guiding mechanism; Its control steps are as follows: (1) The pre-switch starts the pre-guiding motor; (2) The post-photoelectric switch starts the post-guiding motor. At this time, the pre-guiding motor is closed after a time delay. The time delay is determined by the distance from the post-photoelectric switch to the post-guiding mechanism and the rotation speed of the pre-guiding motor; the pre-guiding motor and the post-guiding motor are in an offline state when they are closed.

7. The terminal heat shrinkable tube processing equipment according to any one of claims 1 to 5, characterized in that: The first wire harness inlet, the first guiding channel, and the first wire harness outlet respectively include an upper arc surface and a lower arc surface. A first guiding groove is arranged between the upper arc surface and the lower arc surface and between the adjacent end faces.

8. The terminal heat shrinkable tube processing equipment according to any one of claims 1 to 5, characterized in that: A cooling chamber is provided on one side of the first wire harness outlet. A second guiding channel composed of a porous pipe is arranged in the cooling chamber. The front end of the second guiding channel is the second wire harness inlet, and its end is the second wire harness outlet. The second wire harness inlet corresponds to the position of the first wire harness outlet.

9. The terminal heat shrinkable tube processing equipment according to any one of claims 7, characterized in that: An exhaust mechanism is arranged between the heating chamber and the cooling chamber. The exhaust mechanism includes a group of suspended elastic pieces that are arranged circumferentially along the first wire harness outlet, with one end fixed on the outer wall of the housing and the other end radiating to the corresponding position in the middle of the first wire harness outlet.

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