Automatic thermal shrinkage device for cable bundle sleeve and control method of automatic thermal shrinkage device

Abstract

The invention discloses a cable bundle sleeve automatic thermal shrinkage device and a control method thereof.The device comprises a flattening mechanism, a heating mechanism and a take-up mechanism, and an adjustable gap allowing a cable bundle sleeved with a thermal shrinkage sleeve to penetrate through is formed between an upper roller and a lower roller of the flattening mechanism; a first motor of the flattening mechanism drives a lower roller to rotate so as to transfer the cable bundle to the heating mechanism; the cable bundle penetrates through a center hole of an annular air heater of the heating mechanism, a plurality of air inlet fans are arranged on the outer side wall of a shell of the annular air heater in the circumferential direction, a plurality of air outlets are formed in the inner side wall of the shell in the circumferential direction, and heating wires are arranged on the air inlet sides of the air outlets so as to evenly heat the sleeve; and a second motor of the take-up mechanism drives a take-up reel to rotate, so that the cable bundle penetrating through a center hole of the annular air heater is wound on the side wall of the take-up reel. According to the invention, the cable bundle can be flattened, the heat-shrinkable sleeve is prevented from being heated unevenly during shrinkage, and the appearance of the cable bundle is prevented from being uneven after the heat-shrinkable sleeve is cooled.

Description

Technical Field

[0001] The present invention relates to the technical field of cable processing, and in particular to an automatic heat shrink device for a cable bundle casing and a control method thereof. Background Art

[0002] The emergence of heat-shrinkable materials has provided a convenient and fast shortcut for reliable connections in electronic assembly technology. Consequently, heat-shrink tubing has also become widely used in the production of multi-core cables. To meet the requirements of the working environment and equipment installation environment, some cable bundles require heat-shrink tubing to protect the entire cable.

[0003] In the cable harness manufacturing process, wrapping the entire cable with heat shrink tubing is an important step. During the heat shrinking process, the heat shrink tubing needs to be baked at high temperature to shrink the cable harness tightly, and then cooled to ensure the shrinkage is firm.

[0004] Currently, heating is typically performed using a hot air blower or hair dryer, and the cables must be manually combed before heating. Manually combing the cables as they shrink makes the process complicated and time-consuming. Heat shrinking with a hot air blower or hair dryer often results in uneven heating, requiring the sleeve to be flipped over to complete heating. Uneven heating of the heat shrink tubing can easily lead to uneven shrinkage, resulting in poor cable quality and inability to fully wrap the cable.

[0005] In summary, the existing technical shortcomings of cable harness tubing heat shrinkage processing and storage measures are as follows: 1) When the cable bundle needs to be heat-shrunk, it is necessary to manually keep the heat shrink tubing and the cable bundle aligned. The cable bundle needs to be arranged while heat shrinking to prevent the wires in the heat shrink tubing from bending. This process is time-consuming and labor-intensive.

[0006] 2) Currently, heat shrink tubing is commonly shrinked using a hot air gun. This method requires strict operator skills and manual control of the heating temperature and direction. During the shrinking process, the heat shrink tubing may be locally heated, resulting in heat shrink deformation or damage to the cable insulation layer.

[0007] 3) After the cable bundle sleeve is heat-shrunk, there is generally no good storage device for the cables, which causes the cables to stack and cause surface wrinkles during the natural cooling process of the heat shrink sleeve. Summary of the Invention

[0008] The technical problem to be solved by the present invention is as follows: In view of the above-mentioned problems of the prior art, an automatic heat shrinking device for cable bundle sleeves and a control method thereof are provided, which can flatten the cable bundle after the heat shrink sleeve is sheathed, and at the same time prevent the heat shrink sleeve from being unevenly heated during shrinkage, causing wrinkles in the heat shrink sleeve. It can also effectively avoid the cable being in a large deformation state when the heat shrink sleeve is cooled, resulting in an uneven appearance of the cable.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: An automatic heat shrink device for a cable bundle casing comprises a flattening mechanism, a heating mechanism and a wire-retracting mechanism arranged in sequence, wherein: The flattening mechanism includes an upper roller, a lower roller, and a first motor. An adjustable gap is provided between the upper roller and the lower roller for the cable bundle covered with the heat shrink tubing to pass through. The first motor drives the lower roller to rotate and transfer the cable bundle to the heating mechanism. The heating mechanism includes an annular hot air blower, the cable bundle passes through the center hole of the annular hot air blower, the outer side wall of the shell of the annular hot air blower is circumferentially provided with multiple air inlets, and the inner side wall of the shell is circumferentially provided with multiple air outlets, and the air inlet side of the air outlet is provided with a heating wire to uniformly heat the sleeve of the cable bundle; The wire-taking mechanism includes a wire-taking drum and a second motor. The second motor drives the wire-taking drum to rotate, so that the cable bundle passing through the central hole of the annular hot air blower is wound around the side wall of the wire-taking drum.

[0010] Furthermore, the flattening mechanism also includes a bracket, the lower roller is installed on the bracket, the bracket is provided with a slide groove above the installation position of the lower roller, the end of the rotating shaft of the upper roller is slidably arranged along the slide groove, and the end of the rotating shaft of the upper roller is provided with a fastener, and the bracket is clamped between the fastener and the upper roller.

[0011] Furthermore, a driving gear is provided on the bracket, a first driving gear is provided on the rotating shaft of the first motor, and a first driven gear is provided on the end of the rotating shaft of the lower roller. The first driving gear and the first driven gear are both engaged with the driving gear, so that the first driving gear drives the first driven gear to rotate through the driving gear.

[0012] Furthermore, the air inlets are arranged at equal intervals along the circular cross-section of the shell, and the air outlets are arranged at equal intervals along the circumferential direction of the inner side wall of the shell.

[0013] Furthermore, the rotating shaft of the second motor is provided with a second driving gear, and the end of the rotating shaft of the take-up reel is provided with a second driven gear. The second driving gear is engaged with the second driven gear, so that the second driving gear directly drives the second driven gear to rotate.

[0014] Furthermore, a first cable bundle guide groove is provided between the flattening mechanism and the heating mechanism, the width of the inlet end of the first cable bundle guide groove is the same as that of the upper roller or the lower roller, and the width of the outlet end of the first cable bundle guide groove is greater than the diameter of the cable bundle with the heat shrink tubing.

[0015] Furthermore, a second cable bundle guide groove is provided between the heating mechanism and the take-up mechanism. The width of the inlet end of the second cable bundle guide groove is the same as the diameter of the center hole of the annular hot air blower, and the width of the outlet end of the second cable bundle guide groove is greater than the diameter of the cable bundle with the heat shrink tubing.

[0016] Furthermore, the side wall of the take-up reel is provided with an adhesive layer.

[0017] Furthermore, the rotating shaft of the take-up reel is provided with a flywheel mechanism.

[0018] The present invention further provides a control method for the automatic heat shrink device for cable harness sleeves as described in any one of the preceding claims, comprising the following steps: Obtaining the diameter of the cable bundle covered with the heat shrink tubing, and adjusting the gap between the upper roller and the lower roller in the flattening mechanism so that the cable bundle covered with the heat shrink tubing can pass through the gap and be driven forward by the upper roller and the lower roller; Enable the annular hot air blower of the heating mechanism and wait for a specified time, or obtain the center hole temperature of the annular hot air blower in real time until the specified temperature is reached; If the cable bundle with the heat shrink tubing passes through the gap between the upper roller and the lower roller, the first motor of the flattening mechanism is enabled, and after detecting that the cable bundle has passed through the center hole of the annular hot air blower, the second motor of the take-up mechanism is enabled; If the end of the cable bundle leaves the leveling mechanism, turning off the first motor; If the end of the cable bundle leaves the heating mechanism, the ring hot air blower is turned off and the second motor is turned off after waiting for a specified time.

[0019] Compared with the prior art, the advantages of the present invention are: The present invention includes a flattening mechanism, a heating mechanism and a wire-winding mechanism which are arranged in sequence from front to back. The flattening mechanism uses an upper roller and a lower roller with adjustable gaps, which can comb and flatten cable bundles of different diameters. The double rollers can drive the cable bundle with the heat shrink tubing to move forward automatically, which can avoid the risk of burns to operators caused by high temperature when the cable bundle is heat-shrunk; the heating mechanism adopts an annular hot air blower to blow air from the circumference to the center, ensuring uniform heating in the ring, and the cable bundle with the heat shrink tubing is evenly heated by the annular hot air blower after being combed by the rollers, so that the tubing shrinks evenly, ensuring processing quality, and no manual delivery of the cable bundle is required to prevent burns to personnel; the wire-winding mechanism adopts a rotatable storage tray, and the stored cable bundle is wound around the outside of the storage tray. During the rotation of the storage tray, the cable bundle to be stored is stretched, which can keep the surface of the cable bundle flat during cooling, and effectively avoid the accumulation and wrinkling of the cable bundle after heat shrinkage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side perspective view of a device according to an embodiment of the present invention.

[0021] Figure 2 2 is a front perspective view of a device according to an embodiment of the present invention.

[0022] Figure 3 This is a cross-sectional view of an annular hot air blower of an apparatus according to an embodiment of the present invention.

[0023] Figure 4 2 is a top view of a device according to an embodiment of the present invention.

[0024] Figure 5 Flowchart of a method according to an embodiment of the present invention.

[0025] Legend: 1-flattening mechanism, 2-heating mechanism, 3-take-up mechanism, 4-first cable bundle guide groove, 5-second cable bundle guide groove, 11-upper roller, 12-lower roller, 13-first motor, 14-bracket, 21-annular hot air blower, 22-air inlet fan, 23-heating wire, 31-take-up reel, 32-second motor, 111-fastener, 141-slide, 142-drive gear, 101-base, 201-annular cavity, 202-heating cavity. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0027] Before introducing the specific embodiments of the present invention, relevant concepts or terms are now introduced.

[0028] Multi-core cable: A cable consisting of multiple wires, cables, and single or multiple wire harnesses of a certain length equipped with electrical connectors. It is used to transmit electrical energy, electronic information, and realize electromagnetic energy conversion and has practical functions.

[0029] Cable bundle: A semi-finished product composed of multiple cables or multiple wires combined into a bundle.

[0030] Example 1 Existing cable bundle processing methods cannot effectively solve the problems of cable combing and uniform heating of the cable bundle casing during heat shrinkage, as well as good storage and cooling and shaping. The specific reasons are as follows: 1) Manual combing of cables before heat shrinking is time-consuming and the combing quality is difficult to guarantee.

[0031] 2) Currently, the most common method for heat shrinking tubing is still to use traditional hot air blowers and hair dryers for heating. To ensure uniform heating during the heating process, two people are often required to heat the tubing simultaneously, each holding a hair dryer. If the cable is 5m, 10m or longer, processing will be more difficult.

[0032] 3) Existing equipment or devices only focus on one process of cable combing or tubing heat shrinking, and fail to fully consider the entire process of tubing heat shrinking from online to offline, resulting in uncontrollable tubing heat shrinking quality and waste of manpower.

[0033] This embodiment proposes an automatic heat shrink device for cable bundle sleeves to solve the above problems. Figure 1 As shown, it includes a flattening mechanism 1, a heating mechanism 2 and a wire-reeling mechanism 3 sequentially arranged on a base 101, wherein: The flattening mechanism 1 includes an upper roller 11, a lower roller 12 and a first motor 13. Figure 2 As shown, an adjustable gap is provided between the upper roller 11 and the lower roller 12 for the cable bundle covered with heat shrink tubing to pass through. The first motor 13 drives the lower roller 12 to rotate and transfer the cable bundle to the heating mechanism 2, while the upper roller 11 presses the cable bundle in the gap. The heating mechanism 2 includes an annular hot air blower 21, and the cable bundle passes through the center hole of the annular hot air blower 21. Figure 3 As shown, the outer side wall of the shell of the annular hot air blower 21 is provided with multiple air inlets 22 along the circumferential direction, and the inner side wall of the shell is provided with multiple air outlets along the circumferential direction and the air inlet side of the air outlet is provided with a heating wire 23 to uniformly heat the sleeve of the cable bundle; The wire taking-up mechanism 3 includes a wire taking-up drum 31 and a second motor 32. Figure 2 As shown, the second motor 32 drives the take-up drum 31 to rotate, so that the cable bundle passing through the central hole of the annular hot air blower 21 is wound around the side wall of the take-up drum 31 .

[0034] Through the above structure, the flattening mechanism 1 can flatten the combined cable bundle after the cable bundle is covered with the heat shrink tubing, and then send it into the heating structure 2, so that the heat shrink tubing is evenly heated by the annular hot air blower 21, to prevent the heat shrink tubing from being unevenly heated during shrinkage and causing wrinkles in the heat shrink tubing. Finally, the take-up mechanism 3 winds the cable bundle at the outlet of the center hole of the annular hot air blower 21 on the take-up drum 31 for cooling, so that the cable bundle after the tubing is heated and shrunk is automatically stored, to prevent the cable bundle from being in a large deformation state during cooling of the heat shrink tubing, causing the appearance of the cable bundle to be uneven.

[0035] In this embodiment, the upper roller 11 and the lower roller 12 are both rotating rollers, including a rotating shaft and a roller body sleeved on the outside of the rotating shaft. The roller body is made of polyurethane plastic material, which has good wrapping properties for the cable bundle with the heat shrink tube, and can press and comb the cable bundle with the heat shrink tube and drive it to move forward.

[0036] like Figure 2 As shown, the flattening mechanism 1 of this embodiment further includes a bracket 14, on which the lower roller 12 is mounted. The bracket 14 is composed of a left plate bracket and a right plate bracket. The ends of the rotating shaft of the lower roller 12 are respectively inserted into corresponding through holes in the left plate bracket and the right plate bracket. To achieve an adjustable gap between the upper roller 11 and the lower roller 12, the left plate bracket and / or the right plate bracket of the bracket 14 are provided with a slide groove 141 above the mounting position of the lower roller 12. The end of the rotating shaft of the upper roller 11 slides along the slide groove, and the end of the rotating shaft of the upper roller 11 is provided with a fastener 111. The bracket 14 is sandwiched between the fastener 103 and the upper roller 11.

[0037] In this embodiment, scales can be set on both sides of the slide groove 141 to help the operator quickly adjust to the target position, so that the gap between the upper roller 11 and the lower roller 12 is equal to or slightly smaller than the diameter of the cable bundle with the heat shrink tubing, so as to ensure that the cable bundle with the heat shrink tubing can pass through the gap and be flattened by the upper roller 11 and the lower roller 12 while being driven forward by the upper roller 11 and the lower roller 12.

[0038] In this embodiment, a thread is provided on the end of the rotating shaft of the upper roller 11, and the fastener 111 adopts a nut that cooperates with the rotating shaft thread of the upper roller 11, so that the upper roller 11 can be tightened by rotating the nut in one direction (such as clockwise). After rotating the nut in the other direction (such as counterclockwise), the upper roller 11 is slid along the slide groove 141 to adjust the gap between the upper roller 11 and the lower roller 12.

[0039] In this embodiment, a drive gear 142 is provided on the bracket 14 , a first driving gear is provided on the rotating shaft of the first motor 13 , and a first driven gear is provided on the end of the rotating shaft of the lower roller 12 . Both the first driving gear and the first driven gear are meshed with the drive gear 142 , so that the first driving gear drives the first driven gear to rotate via the drive gear 142 . The drive gear 142 can be used to change the transmission ratio, thereby adjusting the relationship between the input force of the first motor 13 and the output force of the lower roller 12 . This can reduce the force (or torque) required to be applied by the driving gear to a certain extent. This reduces the output requirement of the first motor 13 , enables the first motor 13 to operate under a lower load, and extends its service life.

[0040] In this embodiment, the rotating shaft of the second motor 32 is provided with a second driving gear, and the end of the rotating shaft of the take-up reel 31 is provided with a second driven gear. The second driving gear meshes with the second driven gear, so that the second driving gear directly drives the second driven gear to rotate. The side wall of the take-up reel 31 is provided with an adhesive layer, which can be used to preliminarily fix the cable bundle that initially arrives at the take-up reel 31. The second motor 32 then drives the storage reel 31 to rotate to complete the storage purpose. In addition, the rotating shaft of the take-up reel 31 is provided with a flywheel mechanism. The flywheel mechanism can only transmit forward torque clockwise and cannot transmit torque backward. This facilitates the subsequent removal of the heat-shrinkable cable bundle, and the cable bundle can be pulled out for use by rotating the take-up reel 31 in the opposite direction.

[0041] In this embodiment, the air inlet 22 is arranged at equal intervals along the circular cross-section of the shell, and the air outlet is arranged at equal intervals along the circumferential direction of the inner side wall of the shell. Figure 3 As shown, the shell of the annular hot air blower 21 in this embodiment includes a circular cavity 201 and a heating cavity 202 for accommodating a heating wire. The circular cavity 201 is sleeved on the outside of the heating cavity 202. Four air inlets 22 are arranged on the circular cavity 201 along the 0°, 90°, 180°, and 270° cross-sectional directions respectively. The four air inlets 22 discharge air at a uniform wind speed to form an annular airflow inside the circular cavity 201. At the same time, the inner wall of the circular cavity 201 is provided with uniform circular openings, and the air flow is discharged through the circular openings. The blown cold air enters the heating cavity 202, is heated by the annular heating wire in the heating cavity 202 to form hot air, and the hot air is blown out through the air outlet on the inner wall of the heating cavity 202, which can ensure that the heat shrink tubing is evenly heated. like Figure 4As shown, in this embodiment, a first cable bundle guide groove 4 is provided between the flattening mechanism 1 and the heating mechanism 2. The first cable bundle guide groove 4 is a fan-shaped structure, the width of its inlet end is the same as that of the upper roller 11 or the lower roller 12, and the width of its outlet end is larger than the diameter of the cable bundle with the heat shrink tubing, so as to be suitable for heat shrinkage of different types of cable bundle tubing, specifically the sum of the diameter of the cable bundle with the heat shrink tubing and before the heat shrinkage of the heat shrink tubing and the preset gap value. Through the fan-shaped structure design, the cable bundle can smoothly enter the center hole of the annular hot air blower 21 of the heating mechanism 2 from the flattening mechanism 1.

[0042] like Figure 4 As shown, in this embodiment, a second cable bundle guide groove 5 is provided between the heating mechanism 2 and the take-up mechanism 3. The second cable bundle guide groove 5 also has a fan-shaped structure. The width of its inlet end is the same as the diameter of the center hole of the annular hot air blower 21, and the width of its outlet end is also larger than the diameter of the cable bundle with the heat shrink tubing, specifically the sum of the diameter of the cable bundle after the heat shrink tubing is put on and the heat shrink tubing is heat-shrunk and the preset gap value, so that the cable bundle after heating by the annular hot air blower 21 can be smoothly guided to the take-up mechanism 3.

[0043] Example 2 This embodiment is basically the same as the first embodiment, except that a heating wire is also provided on the air outlet side of the air inlet fan 22, so that the temperature rise speed of the air outlet of the annular hot air blower 21 is increased, thereby improving working efficiency.

[0044] Example 3 This embodiment is substantially the same as the first embodiment, except that a cable bundle clamp is provided on the take-up drum 31 , and the cable bundle initially arriving at the take-up drum 31 is preliminarily fixed by the cable bundle clamp.

[0045] Example 4 This embodiment proposes a control method for the automatic heat shrink device for cable bundle sleeves as described in the first embodiment. Figure 5 As shown, the following steps are included: S1) Obtaining the diameter of the cable bundle covered with the heat shrink tubing, and adjusting the gap between the upper roller 11 and the lower roller 12 of the flattening mechanism 1 so that the cable bundle covered with the heat shrink tubing can pass through the adjusted gap and be driven forward by the upper roller 11 and the lower roller 12. The gap must be less than or equal to the diameter of the cable bundle covered with the heat shrink tubing, and the specific value is determined based on the cable line type of the cable bundle. S2) enabling the annular hot air blower 21 of the heating mechanism 2 and waiting for a specified time, or obtaining the temperature of the center hole of the annular hot air blower 21 in real time, until the specified temperature is reached; S3) If the cable bundle covered with the heat shrink tubing passes through the gap between the upper roller 11 and the lower roller 12, the first motor 13 of the flattening mechanism 1 is enabled. After detecting that the cable bundle has passed through the center hole of the annular hot air blower 21, the second motor 32 of the take-up mechanism 3 is enabled. In this embodiment, the rotation speed of the second motor 32 can be configured to be slightly faster than the rotation speed of the first motor 13, so that the cable bundle is kept taut, effectively preventing surface wrinkles. S4) If the end of the cable bundle leaves the leveling mechanism 1, the first motor 13 is turned off; S5) If the end of the cable bundle leaves the heating mechanism 2, the annular hot air blower 21 is turned off, and the second motor 32 is turned off after waiting for a specified time.

[0046] The above steps can be performed manually, or some steps can be controlled by sensors to reduce manual work and improve production efficiency. For example: In step S2, when obtaining the center hole temperature of the annular hot air blower 21 in real time, a temperature sensor can be installed on the shell of the annular hot air blower 21, and after setting the probe at a specified position in the center hole of the annular hot air blower 21, the data of the temperature sensor can be read in real time.

[0047] In step S3, when it is determined that the cable bundle with the heat shrink tubing passes through the gap between the upper roller 11 and the lower roller 12, a pressure sensor can be installed between the rotating shaft and the roller body of the upper roller 11 and the lower roller 12, and the corresponding pressure data can be read in real time. When the cable bundle with the heat shrink tubing passes through the gap between the upper roller 11 and the lower roller 12, the pressure value will change, thereby determining that the cable bundle with the heat shrink tubing passes through the gap between the upper roller 11 and the lower roller 12.

[0048] In step S3, when determining whether the cable bundle passes through the center hole of the annular hot air blower 21, an infrared sensor or an optical sensor can be set at the entrance end of the second cable bundle guide groove 5. When the cable bundle with the heat shrink tubing passes through the center hole of the annular hot air blower 21 and reaches the second cable bundle guide groove 5 for the first time, the value of the sensor will change (for example, the high level changes to a low level), thereby determining that the cable bundle passes through the center hole of the annular hot air blower 21.

[0049] Similarly, in step S3, when judging whether the end of the cable bundle leaves the flattening mechanism 1 and judging whether the end of the cable bundle leaves the heating mechanism 2, an infrared sensor or an optical sensor can also be set at the entrance end of the first cable bundle guide groove 4. When the end of the cable bundle with the heat shrink tubing leaves the first cable bundle guide groove 4 or the second cable bundle guide groove 5, the value of the sensor will change (for example, the low level becomes a high level), so that it can be determined that the end of the cable bundle leaves the flattening mechanism 1 or the end of the cable bundle leaves the heating mechanism 2.

[0050] In summary, the present invention proposes an automatic heat shrink device for cable bundle tubing and a control method thereof. This device is an integrated device that combines cable combing, tubing heat shrinking, and cable storage. Compared to the current method of heating and shrinking using two upper and lower hot air blowers, the use of a ring-shaped hot air blower ensures uniform heating of the tubing during heat shrinkage. Automatic conveying ensures the personal safety of employees during operation. Furthermore, the method of winding and cooling the cable bundle through a storage tray effectively prevents wrinkles on the cable bundle's surface. The present invention directly integrates the cable combing, tubing heat shrinking, and cable storage processes, replacing manual labor and improving production efficiency.

[0051] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An automatic heat shrink device for cable harness casing, characterized in that: It comprises a flattening mechanism (1), a heating mechanism (2) and a wire taking-up mechanism (3) which are arranged in sequence, wherein: The flattening mechanism (1) comprises an upper roller (11), a lower roller (12) and a first motor (13); an adjustable gap is provided between the upper roller (11) and the lower roller (12) for the cable bundle covered with the heat shrink tubing to pass through; the first motor (13) drives the lower roller (12) to rotate and transfer the cable bundle to the heating mechanism (2); The heating mechanism (2) includes an annular hot air blower (21), the cable bundle passes through the center hole of the annular hot air blower (21), a plurality of air inlets (22) are circumferentially arranged on the outer side wall of the shell of the annular hot air blower (21), and a plurality of air outlets are circumferentially opened on the inner side wall of the shell, and a heating wire (23) is provided on the air inlet side of the air outlet to uniformly heat the sleeve of the cable bundle; The wire take-up mechanism (3) comprises a wire take-up drum (31) and a second motor (32), wherein the second motor (32) drives the wire take-up drum (31) to rotate, so that the cable bundle passing through the central hole of the annular hot air blower (21) is wound around the side wall of the wire take-up drum (31).

2. The automatic heat shrink device for cable harness sleeves according to claim 1, characterized in that: The flattening mechanism (1) further comprises a bracket (14), the lower roller (12) being mounted on the bracket (14), the bracket (14) being provided with a slide groove (141) above the mounting position of the lower roller (12), the end portion of the rotating shaft of the upper roller (11) being slidably arranged along the slide groove, and the end portion of the rotating shaft of the upper roller (11) being provided with a fastener (111), and the bracket (14) being clamped between the fastener (103) and the upper roller (11).

3. The automatic heat shrink device for cable harness sleeves according to claim 2, characterized in that: The bracket (14) is provided with a driving gear (142), the rotating shaft of the first motor (13) is provided with a first driving gear, and the end of the rotating shaft of the lower roller (12) is provided with a first driven gear. The first driving gear and the first driven gear are both engaged with the driving gear (142), so that the first driving gear drives the first driven gear to rotate through the driving gear (142).

4. The automatic heat shrink device for cable harness sleeves according to claim 1, characterized in that: The air inlet fans (22) are arranged at equal intervals along the circular section of the shell, and the air outlets are arranged at equal intervals along the circumferential direction of the inner side wall of the shell.

5. The automatic heat shrink device for cable harness sleeves according to claim 1, characterized in that: The rotating shaft of the second motor (32) is provided with a second driving gear, and the end of the rotating shaft of the take-up reel (31) is provided with a second driven gear. The second driving gear is meshed with the second driven gear, so that the second driving gear directly drives the second driven gear to rotate.

6. The automatic heat shrink device for cable harness sleeves according to claim 1, characterized in that: A first cable bundle guide groove (4) is provided between the flattening mechanism (1) and the heating mechanism (2); the width of an inlet end of the first cable bundle guide groove (4) is the same as that of the upper roller (11) or the lower roller (12); and the width of an outlet end of the first cable bundle guide groove (4) is greater than the diameter of the cable bundle covered with the heat shrink tubing.

7. The automatic heat shrink device for cable harness sleeves according to claim 1, characterized in that: A second cable bundle guide groove (5) is provided between the heating mechanism (2) and the take-up mechanism (3); the width of the inlet end of the second cable bundle guide groove (5) is the same as the diameter of the center hole of the annular hot air blower (21); and the width of the outlet end of the second cable bundle guide groove (5) is greater than the diameter of the cable bundle covered with the heat shrink tubing.

8. The automatic heat shrink device for cable harness sleeves according to claim 1, characterized in that: The side wall of the take-up drum (31) is provided with an adhesive layer.

9. The automatic heat shrink device for cable harness sleeves according to claim 1, characterized in that: The rotating shaft of the take-up reel (31) is provided with a flywheel mechanism.

10. The control method of the cable harness sleeve automatic heat shrink device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Obtaining the diameter of the cable bundle covered with the heat shrink tubing, and adjusting the gap between the upper roller (11) and the lower roller (12) in the flattening mechanism (1) so that the cable bundle covered with the heat shrink tubing can pass through the gap and be driven forward by the upper roller (11) and the lower roller (12); Enable the annular hot air blower (21) of the heating mechanism (2), wait for a specified time, or obtain the center hole temperature of the annular hot air blower (21) in real time until the specified temperature is reached; If the cable bundle covered with the heat shrink tubing passes through the gap between the upper roller (11) and the lower roller (12), the first motor (13) of the flattening mechanism (1) is enabled, and after detecting that the cable bundle passes through the center hole of the annular hot air blower (21), the second motor (32) of the take-up mechanism (3) is enabled; If the end of the cable bundle leaves the leveling mechanism (1), the first motor (13) is turned off; If the end of the cable bundle leaves the heating mechanism (2), the annular hot air blower (21) is turned off, and the second motor (32) is turned off after waiting for a specified time.

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