Starting protection mechanism, thermal shrinkage equipment and use method of thermal shrinkage equipment

Abstract

The invention relates to the technical field of wiring harness equipment automation, in particular to a starting protection mechanism, thermal shrinkage equipment and a using method thereof. According to the technical scheme, the auxiliary positioning support is characterized by comprising an auxiliary positioning section, a rotating shaft and a driving section, and the rotating shaft is located between the auxiliary positioning section and the driving section; the driving mechanism is connected with the driving section to drive the auxiliary positioning bracket to rotate back and forth between the positioning station and the starting station around the rotating shaft; the safety lock assembly comprises a locking piece and a matching piece, and the driving mechanism drives the auxiliary positioning support to rotate from the positioning station to the starting station and drives the locking piece and the matching piece to be locked at the same time. The safety protection and positioning precision of the thermal shrinkage equipment in the machining process is guaranteed, the consistency of batch machining is guaranteed while potential safety hazards are reduced, and the maintenance cost and the operation risk of the thermal shrinkage equipment are reduced.

Description

Technical Field

[0001] This invention relates to the field of wire harness equipment automation, and particularly to a start-up protection mechanism, a heat-shrinkable device, and a method of using the same. Background Technology

[0002] Heat shrink tubing is a key process in the manufacturing of electrical connection components such as cables and wire harnesses. After the heat shrink tubing is applied to the welding points or connections of the wire harness, it shrinks due to heat, achieving functions such as insulation protection and sealing fixation. Most common wire harness heat shrinking equipment is done manually. Operators need to first position the heat shrink tubing at the welding points of the wire harness, and then heat the wire harness using a heating unit.

[0003] However, if the positioning of heat shrink tubing and welding points relies solely on visual alignment by the operator, the positioning consistency is poor, making it difficult to stably position the welding points and center points of the heat shrink tubing. This results in significant processing deviations, which in turn affect the quality of the heat-shrinked wrapping. In such operations, an auxiliary positioning structure is usually required to accurately position the heat shrink tubing, wire harness, and other workpieces, clarify the welding point position, and fix it in place, in conjunction with the heating unit to complete the processing. However, the location of the auxiliary positioning structure often conflicts with the movement path of the heating unit. Due to the lack of an effective avoidance mechanism, collisions are prone to occur when the positioning and heating processes are connected, which not only damages the heating unit and the auxiliary positioning structure but also affects the repeatability of positioning accuracy and increases equipment maintenance costs.

[0004] In addition, in such heating equipment, to prevent operators from being burned by the high temperature generated when the heating unit is working, and to prevent foreign objects from entering the processing area and affecting processing accuracy and equipment operation safety, a protective cover is usually used to form a closed space during heating to reduce heat loss and protect personnel safety. The heating equipment will only start the heat shrinking operation when the protective cover is lowered and locked. If heating starts before the protective cover is fully closed or if the protective cover is accidentally loosened during processing, it will not be able to play an effective protective role, and the heat shrinking equipment will alarm to avoid causing safety hazards. Summary of the Invention

[0005] The purpose of this invention is to provide a start-up protection mechanism, a heat-shrinking device, and a method for using the same, in order to solve the problems of path interference between the auxiliary positioning bracket and the heating unit and insufficient reliability of the locking of the safety protection components in the prior art.

[0006] The technical solution of the present invention is: a start-up protection mechanism, comprising: An auxiliary positioning bracket includes an auxiliary positioning section, a rotating shaft, and a driving section, wherein the rotating shaft is located between the auxiliary positioning section and the driving section. The drive mechanism, which is connected to the drive section, drives the auxiliary positioning bracket to rotate back and forth between the positioning station and the starting station around the rotation axis; The safety lock assembly includes a locking component and a mating component. The drive mechanism drives the auxiliary positioning bracket to rotate from the positioning station to the starting station, while simultaneously engaging the locking component and the mating component.

[0007] Preferably, when the drive mechanism drives the auxiliary positioning bracket to rotate from the positioning station to the starting station, the drive section applies a force to the locking member to move the locking member to lock with the mating member.

[0008] Preferably, the locking member includes a connecting part and a spring-loaded part that are fixedly connected to each other. The connecting part is slidably connected to the fixing member. The connecting part has a plurality of moving grooves, and the connecting part moves relative to the fixing member through the moving grooves.

[0009] Preferably, the rebound part includes an elastic element and a connecting element. The connecting element is fixedly connected to the connecting part and connected to the elastic element. The end of the elastic element away from the connecting element is fixed. When the driving mechanism drives the auxiliary positioning bracket to rotate from the starting position to the positioning position, the elastic element pulls the locking element back to the unlocked position.

[0010] Preferably, the auxiliary positioning section includes at least two side plates and a plurality of parallel connecting rods, the connecting rods being fixedly connected between the two side plates, and a positioning element being slidably connected to the connecting rods.

[0011] The present invention also discloses a heat shrinking device, including at least one heating station, wherein the heating station is provided with the start-up protection mechanism described in any of the above claims, characterized in that: the heating station is provided with a heating unit and a safety protection component, the auxiliary positioning bracket at the positioning station is located on the movement path of the heating unit from the initial station to the heating station, the bottom of the heat shrinking device is provided with a clearance space, and the auxiliary positioning bracket rotates within the clearance space to the start-up station to avoid the movement of the heating unit.

[0012] Preferably, the base plate of the heat shrinking device is slidably connected to the locking member through a fixing member, the mating member is fixedly connected to the lower end of the safety protection member, the base plate has a through groove, and the mating member passes through the through groove and locks with the locking member.

[0013] Preferably, the heating unit heats at the heating station, and the positioning station is located below the heating station.

[0014] This invention also discloses a method for using a heat shrinking device, comprising the following steps: The auxiliary positioning bracket is positioned at the positioning station. The position of the positioning component is adjusted and fixed so that the position of the welding point or crimping point of the wire harness is consistent with that of the positioning component. Place the heat shrink tubing and wire harness, and use the side plate of the auxiliary positioning section to hold both ends of the heat shrink tubing in place. The center point of the wire harness corresponds to the position of the positioning component. After positioning, fix the heat shrink tubing and wire harness.

[0015] Preferably, the following steps are also included: Start the drive mechanism, the auxiliary positioning bracket rotates from the positioning station to the start station and the safety lock component locks in, locking the safety protection component. Start the heating unit, the heating unit moves from the initial station to the heating station and begins heating. After heating stops, the heating unit returns to the initial position, the drive mechanism is restarted, the auxiliary positioning bracket rotates from the starting position to the positioning position, the locking part returns to the unlocked position, and the safety lock component unlocks.

[0016] Compared with the prior art, the advantages of the present invention are: (1) Through the linkage structure of the auxiliary positioning bracket and safety lock components with stable operation and high efficiency, the safety protection and positioning accuracy of the heat shrink equipment processing process are guaranteed, the safety hazards are reduced, the consistency of batch processing is ensured, and the maintenance cost and operation risk of the heat shrink equipment are reduced.

[0017] (2) The locking action is achieved by simultaneously pushing the locking component while the auxiliary positioning bracket rotates through the driving structure. There is no need to set a separate power source to switch the locking state of the safety lock component. The structure is simple and compact, and the action response is sensitive. Compared with pure electrical control, the locking action driven by the mechanical structure has no signal delay, avoiding the safety hazard of the heating unit starting heating when the safety protection component is not locked due to accidental touch.

[0018] (3) The side plate of the auxiliary positioning bracket can be directly snapped to at least one edge position in the length direction of the heat shrink tubing. The positioning component is adjusted according to the welding point requirements of different specifications of wire harnesses, and the positioning reference of the heat shrink tubing and the wire harness is quickly determined, thereby improving the positioning accuracy, having strong versatility, effectively controlling the positioning deviation during wire harness heat shrinking, and reducing the defect rate of wire harness wrapping. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the auxiliary positioning bracket described in this invention; Figure 2 This is a schematic diagram of the structure of the safety lock assembly described in this invention; Figure 3 This is a schematic diagram of the activation protection mechanism described in this invention; Figure 4 This is a schematic diagram of the structure of the starting protection mechanism, the safety protection component, and the base plate when the mechanism is located at the positioning station. Figure 5 This is a schematic diagram of the structure of the starting protection mechanism and the safety protection component when the starting station is located; Figure 6 This is a schematic diagram of the structure of the heat shrink equipment described in this invention after removing the safety guard. Figure 7 This is a schematic diagram of the structure of the heat shrinking device described in this invention.

[0020] The components include: 1. Auxiliary positioning bracket; 11. Auxiliary positioning section; 101. Side plate; 102. Connecting rod; 103. Positioning component; 12. Rotating shaft; 13. Drive section; 2. Drive mechanism; 3. Safety lock assembly; 31. Locking component; 311. Connecting part; 301. Fixing component; 302. Moving groove; 303. Locking mating groove; 312. Springback part; 304. Elastic component; 305. Connecting component; 32. Mating component; 4. Heating unit; 5. Safety protection component; 6. Base plate; 61. Groove; 7. Wiring harness fixing unit; 8. Cooling unit. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific embodiments: like Figures 1-3 As shown, the activation protection mechanism includes an auxiliary positioning bracket 1, a drive mechanism 2, and a safety lock assembly 3. The auxiliary positioning bracket 1 is connected to the movable end of the drive mechanism 2. The drive mechanism 2 is connected to the drive section 13 to drive the auxiliary positioning bracket 1 to rotate back and forth between the positioning station and the activation station around the rotation axis 12. The drive mechanism 2 provides stable power for the station switching of the auxiliary positioning bracket 1 and the locking of the safety lock assembly 3. The locking action of the safety lock assembly 3 is achieved by the driving mechanism 2 pushing the locking part 31. The mechanical structure of the auxiliary positioning and drive locking is compact and responsive, avoiding the safety hazard caused by the safety protection part 5 not being locked due to electrical control delay or accidental action, which may lead to the activation of heating.

[0022] like Figure 1 As shown, the auxiliary positioning bracket 1 includes an auxiliary positioning section 11, a rotating shaft 12, and a driving section 13. The rotating shaft 12 is located between the auxiliary positioning section 11 and the driving section 13. The auxiliary positioning section 11 includes at least two side plates 101 and several parallel connecting rods 102. The connecting rods 102 are fixedly connected between the two side plates 101. The heat shrink tubing is placed between the two side plates 101 to determine the position of at least one edge in the length direction of the heat shrink tubing. A positioning element 103 is slidably connected to the connecting rod 102. When the auxiliary positioning bracket 1 is in the positioning position, the positioning element 103 is used to identify the welding point and locate the center point of the wire harness. Mechanical limiting and marking positioning replace the traditional manual visual alignment, ensuring the packaging quality of each batch of wire harnesses after heat shrinking.

[0023] like Figures 2-5As shown, the safety lock assembly 3 includes a locking member 31 and a mating member 32. The drive mechanism 2 drives the auxiliary positioning bracket 1 to rotate from the positioning station to the starting station, while simultaneously locking the locking member 31 and the mating member 32 together. The drive section 13 applies a force to the locking member 31 to move it to lock with the mating member 32. The locking member 31 includes an integrally formed connecting part 311 and a spring-loaded part 312. The connecting part 311 is slidably connected to the fixing member 301. The connecting part 311 has several moving grooves 302. The connecting part 311 moves relative to the fixing member 301 through the moving grooves 302, thereby ensuring that the locking member 31 moves during the movement process. The stability of the spring part 312 includes an elastic element 304 and a connecting element 305. The connecting element 305 is fixedly connected to the connecting part 311 and connected to the elastic element 304. The end of the elastic element 304 away from the connecting element 305 is fixed. When the drive mechanism 2 drives the auxiliary positioning bracket 1 to rotate from the starting position to the positioning position, the elastic element 304 provides power for the reset of the locking element 31, pulling the locking element 31 to move to the unlocked position, thereby realizing the automatic unlocking of the safety protection element 5. The locking action is synchronized with the position switching of the auxiliary positioning bracket 1. The locking and unlocking of the safety protection element 5 are directly controlled by the movement of the locking element 31.

[0024] Reference Figure 6 and Figure 7 As shown, the activation protection mechanism is used in a heat shrink equipment. The heat shrink equipment includes a heating unit 4, a cooling unit 8, a safety protection component 5, and an activation protection mechanism. The auxiliary positioning bracket 1, located at the positioning station, is situated on the movement path of the heating unit 4 from its initial station to the heating station. The heating unit 4 heats at the heating station. In the application scenario, the positioning station is located below the heating station, and the cooling unit 8 is positioned diagonally above the wire harness fixing unit 7. A clearance space is provided at the bottom of the heat shrink equipment. The rotation path of the auxiliary positioning bracket 1 is planned within this clearance space to avoid affecting other components of the heat shrink equipment. The auxiliary positioning bracket 1 rotates within the clearance space to the activation station to avoid the movement of the heating unit 4. Figure 4 As shown, the fixing member 301 is fixedly connected to the base plate 6 of the heat shrink equipment, the locking member 31 is slidably connected to the base plate 6, the base plate 6 has a groove 61, the connecting member 305 passes through the groove 61 and connects with the elastic member 304, the elastic member 304 is fixedly connected to the base plate 6, the mating member 32 is fixedly connected to the lower end of the safety protection member 5, the connecting part 311 and the base plate 6 have corresponding locking mating grooves 303, the mating member 32 passes through the locking mating groove 303 and locks with the locking member 31, the locking and unlocking of the safety protection member 5 is linked with the switching of the work position of the auxiliary positioning bracket 1, the safety protection member 5 is only physically locked when the auxiliary positioning bracket 1 is in the start position, the safety protection member 5 cannot be opened during the heating process, thereby improving the safety protection capability of the heat shrink equipment.

[0025] The method of using heat shrink equipment includes the following steps: The auxiliary positioning bracket 1 is in the positioning position, and the position of the positioning component 103 is adjusted and fixed so that the position of the welding point or crimping point of the wire harness is consistent with the position of the positioning component 103. Place the heat shrink tubing and wire harness, and snap the two ends of the heat shrink tubing into place through the side plate 101 of the auxiliary positioning section 11. The center point of the wire harness corresponds to the position of the positioning piece 103. After positioning, fix the heat shrink tubing and wire harness. Lower the safety guard 5, start the drive mechanism 2, the auxiliary positioning bracket 1 rotates from the positioning station to the starting station and at the same time the safety lock component 3 locks, locking the safety guard 5, start the heating unit 4, the heating unit 4 moves from the initial station to the heating station and begins heating; After heating stops, heating unit 4 returns to the initial position, cooling unit 8 starts, and after cooling, drive mechanism 2 is started again. Auxiliary positioning bracket 1 rotates from the starting position to the positioning position, locking component 31 returns to the unlocked position, safety lock component 3 is unlocked, and safety protection component 5 can be opened.

[0026] Example 1

[0027] like Figure 6 and Figure 7 As shown, a heat shrinking device includes a heating unit 4, a cooling unit 8, a wire harness fixing unit 7, a safety guard 5, and a start-up protection mechanism. The safety guard 5 is a transparent protective cover that can be manually pulled down or automatically lowered by pressing the start button. It effectively isolates high temperatures, protects operators, and allows observation of the processing status. If the safety guard 5 is not lowered and is locked, the heating device will not start the heat shrinking process. After the safety guard 5 is locked, the drive mechanism 2 is automatically activated. The heating unit 4 includes upper and lower heating plates, and its movement path is a straight reciprocating motion. Before heating, the heating unit 4 shrinks within the heat shrinking device. The initial working position inside the machine body. During heating, the heating unit 4 moves to the heating working position. The wire harness fixing unit 7 is a wire harness clamp unit that can be replaced according to the operation requirements. It is located between the two heating plates. After heating is completed, the heating unit 4 returns to the initial working position along the original path. After fixing the wire harness and heat shrink tubing to the wire harness fixing unit 7, the safety guard 5 is fastened to form a closed space. The cooling unit 8 includes a cooling fan and a cold air guide structure. The cold air guide structure is set on the end face of the cooling fan facing the wire harness fixing unit 7. After heating is completed, the wire harness product is cooled. By raising the support base at the bottom of the heat shrink equipment, a clearance space is set at the bottom of the heat shrink equipment for the activation protection mechanism to move.

[0028] Among them, such as Figures 1-5 As shown, the activation protection mechanism includes an auxiliary positioning bracket 1, a drive mechanism 2, and a safety lock assembly 3. The shape of the auxiliary positioning bracket 1 is shown in the figure. Figure 1As shown, the folded shape of the auxiliary positioning bracket 1 keeps the auxiliary positioning section 11 parallel to the wire harness fixing unit 7, which facilitates the positioning component 103 to mark the wire harness welding points. It also reduces the clearance space required for the auxiliary positioning bracket 1 to rotate. When the auxiliary positioning bracket 1 is in the positioning position, it is located on the moving path of the heating unit 4. After the auxiliary positioning bracket 1 is switched to the starting position, it can avoid the heating unit 4. The drive mechanism 2 is a cylinder, and the piston rod of the cylinder is installed and connected to the drive section 13. The locking component 31 is a U-shaped clip. The lower end of the safety protection component 5 is integrally formed with a mating component 32, which is a hook. The locking component 31 includes an integrally formed connecting part 311 and a spring-loaded part 312. The connecting part 311 has four openings. The movable groove 302 and the fixing member 301 are screws fixed to the base plate 6 of the heat shrink equipment. The fixing member 301 passes through the movable groove 302. The locking member 31 can move relative to the fixing member 301 along the length direction of the movable groove 302. The base plate 6 of the heat shrink equipment has a groove 61. The spring part 312 passes through the groove 61 and connects with the elastic member 304. The elastic member 304 is a spring. The end of the elastic member 304 away from the spring part 312 is fixed to the upper end surface of the base plate 6 of the heat shrink equipment. When the auxiliary positioning bracket 1 is in the positioning position, the locking member 31 is in the unlocked position and the elastic member 304 is in the natural state. When the locking member 31 is pushed to the locking position, the elastic member 304 is stretched and has elastic potential energy to pull the locking member 31 to reset.

[0029] Workflow: In the initial state of the heat shrinking equipment, the auxiliary positioning bracket 1 is located at the positioning station, the locking part 31 is in the unlocked position, the safety protection part 5 is in the unlocked free state, and the heating unit 4 is in the initial station. The operator adjusts and fixes the position of the positioning component 103 on the auxiliary positioning bracket 1 and locks it in place. The heat shrink tubing and wire harness are placed on the wire harness fixing unit 7. The side plate 101 of the auxiliary positioning section 11 is snapped into the two sides of the heat shrink tubing along its length. The center point of the wire harness corresponds to the position of the positioning component 103, thus completing the positioning. The safety protection component 5 is fastened down, and the mating component 32 passes through the locking groove 303 of the base plate 6 and the connecting part 311. The drive component is started, pushing the auxiliary positioning bracket 1 to rotate around the rotating axis to the starting position. At the same time, the drive component pushes the locking component 31 to move closer to the mating component 32 through the drive section 13 until the locking component 31 and the mating component 32 are engaged and locked, and the safety protection component is locked and cannot be opened. After the safety protection device is locked, the heating unit 4 is automatically started. The heating unit 4 moves from the initial station to the heating station along a straight path to heat the heat shrink tubing and wire harness. After heating is completed, heating unit 4 stops heating and returns to the initial position along the original path. The drive device starts in reverse and drives the auxiliary positioning bracket 1 to rotate from the starting position to the positioning position. The thrust of drive section 13 on locking member 31 is gradually removed, and elastic member 304 pulls locking member 31 to slide in the opposite direction to return to the unlocked position. Safety protection member 5 is unlocked, and the operator can open safety protection member 5, take out the processed wire harness, replace the wire harness and enter the next processing.

[0030] Example 2

[0031] A heat shrinking device has two heating stations, each equipped with a wire harness fixing unit 7, a safety guard 5, and a start-up protection mechanism. The heating unit 4 moves back and forth between the initial station and the two heating stations. The two heating stations can be arranged side by side or longitudinally back to back. In the initial state, the heating unit 4 is in the initial station, and the auxiliary positioning brackets 1 corresponding to the two heating stations are in the positioning station. After the wire harness and heat shrink tubing are fixedly installed in one of the heating stations, the corresponding auxiliary positioning bracket 1 moves to the start-up station, and the heating unit 4 moves to the first heating station for heating. While the first heating station is heating, the operator can position and install the wire harness and heat shrink tubing in the second heating station. After the wire harness and heat shrink tubing in the first heating station are heated, the heating unit 4 moves directly to the second heating station, and so on, thereby realizing the parallel operation of the "preparation" and "heating" processes, effectively shortening the production cycle and improving the efficiency of batch production. After all the wire harnesses and heat shrink tubing are heated, the heating unit 4 returns to the initial station.

[0032] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. A start-up protection mechanism, characterized in that, include: The auxiliary positioning bracket (1) includes an auxiliary positioning section (11), a rotating shaft (12) and a driving section (13), wherein the rotating shaft (12) is located between the auxiliary positioning section (11) and the driving section (13); The drive mechanism (2) is connected to the drive section (13) to drive the auxiliary positioning bracket (1) to rotate back and forth between the positioning station and the starting station around the rotation axis (12); The safety lock assembly (3) includes a locking element (31) and a mating element (32). The drive mechanism (2) drives the auxiliary positioning bracket (1) to rotate from the positioning station to the starting station, while simultaneously locking the locking element (31) and the mating element (32) together.

2. The activation protection mechanism according to claim 1, characterized in that: When the drive mechanism (2) drives the auxiliary positioning bracket (1) to rotate from the positioning station to the starting station, the drive section (13) applies a force to the locking member (31) to move the locking member (31) to lock with the mating member (32).

3. The activation protection mechanism according to claim 2, characterized in that: The locking member (31) includes a connecting part (311) and a spring-loaded part (312) that are fixedly connected to each other. The connecting part (311) is slidably connected to the fixing member (301). The connecting part (311) is provided with a plurality of moving grooves (302). The connecting part (311) moves relative to the fixing member (301) through the moving grooves (302).

4. The activation protection mechanism according to claim 3, characterized in that: The rebound part (312) includes an elastic element (304) and a connecting element (305). The connecting element (305) is fixedly connected to the connecting part (311) and connected to the elastic element (304). The end of the elastic element (304) away from the connecting element (305) is fixed. When the driving mechanism (2) drives the auxiliary positioning bracket (1) to rotate from the starting position to the positioning position, the elastic element (304) pulls the locking element (31) back to the unlocked position.

5. The activation protection mechanism according to claim 1, characterized in that: The auxiliary positioning section (11) includes at least two side plates (101) and a plurality of parallel connecting rods (102). The connecting rods (102) are fixedly connected between the two side plates (101), and a positioning element (103) is slidably connected to the connecting rods (102).

6. A heat shrinking device, comprising at least one heating station, wherein the heating station is provided with a start-up protection mechanism as described in any one of claims 1-5, characterized in that: The heating station is equipped with a heating unit (4) and a safety protection component (5). The auxiliary positioning bracket (1) located at the positioning station is on the movement path of the heating unit (4) from the initial station to the heating station. The bottom of the heat shrinking device is provided with a clearance space. The auxiliary positioning bracket (1) rotates within the clearance space to the starting station to avoid the movement of the heating unit (4).

7. The heat shrinking device according to claim 6, characterized in that: The base plate (6) of the heat shrinking equipment is slidably connected to the locking member (31) through the fixing member (301), and the mating member (32) is fixedly connected to the lower end of the safety protection member (5). The base plate (6) has a through groove, and the mating member (32) passes through the through groove and locks with the locking member (31).

8. The heat shrinking device according to claim 6, characterized in that: The heating unit (4) heats at the heating station, and the positioning station is located below the heating station.

9. The method of using the heat shrink equipment according to any one of claims 7-8, characterized in that, Includes the following steps: When the auxiliary positioning bracket (1) is in the positioning position, adjust and fix the position of the positioning component (103) so that the position of the welding point or crimping point of the wire harness is consistent with the position of the positioning component (103); Place the heat shrink tubing and wire harness, and use the side plate (101) of the auxiliary positioning section (11) to snap the two ends of the heat shrink tubing together. The center point of the wire harness corresponds to the position of the positioning piece (103). After positioning, fix the heat shrink tubing and wire harness.

10. The method of using the heat shrink equipment according to any one of claims 7-8, characterized in that, Includes the following steps: Lower the safety guard (5), start the drive mechanism (2), the auxiliary positioning bracket (1) rotates from the positioning station to the starting station and the safety lock assembly (3) locks in, locking the safety guard (5), start the heating unit (4), the heating unit (4) moves from the initial station to the heating station and starts heating; After heating stops, the heating unit (4) returns to the initial position, the drive mechanism (2) is started again, the auxiliary positioning bracket (1) rotates from the starting position to the positioning position, the locking part (31) returns to the unlocking position, and the safety lock assembly (3) is unlocked.

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