A high-temperature resistant wire harness and its wire harness terminal crimping and forming equipment

Abstract

The invention discloses a high temperature resistant wire harness and its wire harness terminal crimping forming equipment, comprising a wire core, a shielding layer, an inner sheath, an armor layer and a high temperature resistant outer sheath, wherein a tensile core assembly is arranged at the center of a plurality of twisted wire cores; the tensile core assembly comprises an elastic tube and an internal tensile core, and the plurality of tensile cores are twisted along the length direction; the wire harness terminal crimping forming equipment comprises a wire harness conveying mechanism, a wire harness head end conveying and positioning mechanism, a terminal conveying and positioning mechanism and a crimping mechanism; the twisted tensile core forms a plurality of spiral channels in the elastic tube, and the elastic tube is covered with ventilation holes, so that the air in the elastic tube contacts with the surrounding spirals, thereby providing uniform heat dissipation around; when the wire harness is processed and assembled in batches, the two ends of the wire harness terminal can be crimped and formed synchronously, with high efficiency; the fully automatic crimping and assembly of the wire harness terminal can be completed, with high precision and high efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of wire harness processing, and in particular relates to a high temperature resistant wire harness and a wire harness terminal crimping and forming device. Background Art

[0002] There are many types of wiring harnesses, which are widely used in many fields. They are generally used to connect power supply, data transmission, signal transmission, power transmission and communication control systems.

[0003] With the development of the automotive industry, especially the vigorous development of new energy vehicles, the demand for wiring harnesses is expanding rapidly. In the automotive industry, wiring harnesses are mainly used to transmit power, signals and data, and connect various systems and components of the vehicle, such as engine control units, dashboards, lights, audio systems, etc. Correspondingly, there are also higher requirements for the performance and type of wiring harnesses.

[0004] Some wiring harnesses need to adapt to high temperature environments, such as engine wiring harnesses. Current wiring harnesses are generally protected by external high-temperature resistant sheaths, but lack an efficient heat dissipation structure internally. The high-temperature resistance is average, and the wiring harnesses are prone to aging, making it difficult to adapt to the needs of modern automobile manufacturing. At the same time, when the wiring harnesses are processed and assembled in batches, the terminals at both ends of the wiring harnesses need to be crimped, but the current wiring harnesses are crimped separately at both ends, which is inefficient. At the same time, it is difficult to complete fully automatic crimping assembly when the wiring harnesses are crimped. Summary of the invention

[0005] The present invention provides a high temperature resistant wire harness and its wire harness terminal crimping forming equipment, wherein a twisted tensile core forms a plurality of spiral channels in an elastic tube, and the elastic tube is covered with ventilation holes, so that the air in the elastic tube contacts the surrounding spirals, providing uniform heat dissipation on all sides; when the wire harness is processed and assembled in batches, the two ends of the wire harness terminal can be crimped and formed synchronously, with high efficiency; the fully automatic crimping assembly of the wire harness terminal can be completed, with high precision and high efficiency, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-temperature resistant wire harness, comprising a wire core, a shielding layer, an inner sheath, an armor layer and a high-temperature resistant outer sheath, wherein a plurality of the wire cores are provided, the plurality of the wire cores are twisted along the length direction, and a tensile core assembly is provided at the center of the plurality of the wire cores; the tensile core assembly comprises an elastic tube and an internal tensile core, a plurality of the tensile cores are provided, the plurality of the tensile cores are twisted along the length direction; the outer wall of the tensile core is tightly attached to the inner wall of the elastic tube, the elastic tube is covered with ventilation holes, and the tensile core is made of a heat-conducting material; the wire core is coated with the shielding layer, a filler is filled between the wire core and the shielding layer, the shielding layer is covered with the inner sheath, the inner sheath is covered with the armor layer, and the armor layer is covered with the high-temperature resistant outer sheath.

[0007] Preferably, the elastic tube is a silicone tube.

[0008] Preferably, the tensile core is made of aluminum alloy material.

[0009] Preferably, three tensile cores are provided.

[0010] The present invention provides a wire harness terminal crimping and forming device based on the high-temperature resistant wire harness described in any one of the above, including a wire harness conveying mechanism, a wire harness head end conveying and positioning mechanism, a terminal conveying and positioning mechanism, and a crimping mechanism;

[0011] The wire harness conveying mechanism includes a conveyor belt, on which a wire harness is conveyed, and a in-place sensor is provided on the conveyor belt;

[0012] The wire harness head end conveying and positioning mechanism includes two parallel first rodless cylinders perpendicular to the conveyor belt. A first slider is installed on the first rodless cylinder, and a synchronous cylinder is installed on the top of each first slider. The top ends of the piston rods of the two synchronous cylinders are equipped with a rodless cylinder assembly parallel to the conveyor belt. The rodless cylinder assembly includes two second rodless cylinders symmetrically arranged from the middle. A second slider is respectively controlled below the second rodless cylinder. After the second slider extends a certain length in the direction of the conveyor belt, a reversely placed rotary cylinder is installed. The piston rod of the rotary cylinder penetrates through the second slider and is equipped with a clamping cylinder, and two clamping jaws are installed below the clamping cylinder;

[0013] The terminal conveying and positioning mechanism includes two parallel first guide rails opposite to the conveyor belt and located between the two first rodless cylinders. A terminal conveying die is installed on the first guide rail. Two terminal placement cavities are provided on the side of the terminal conveying die facing the conveyor belt for placing terminals. An installation plate is provided between the two first guide rails, and a servo cylinder is installed on the installation plate;

[0014] The crimping mechanism includes an upper crimping cylinder reversely placed on the second slider. The piston rod of the upper crimping cylinder penetrates through the second slider and is equipped with an upper fixture. Two upward lower crimping cylinders are provided on one side of the terminal conveying and positioning mechanism, and a lower fixture is installed at the top end of the piston rod of the lower crimping cylinder.

[0015] Preferably, the conveyor belt is a V-shaped conveyor belt with a V-shaped groove in the middle of the top surface.

[0016] Preferably, a wire harness positioning mechanism is installed between the two first rodless cylinders. The wire harness positioning mechanism includes a third rodless cylinder, a sliding seat is arranged on the third rodless cylinder, a wire hanging table is installed on the sliding seat, and a blocking plate is arranged on the top of the wire hanging table.

[0017] Preferably, the length of the blocking plate is designed according to the distance between the two ends of the wire harness when the wire harness is crimped.

[0018] Preferably, the blocking plate is an arc-shaped structure at both ends close to the conveyor belt.

[0019] Preferably, two parallel second guide rails are arranged on the slide seat, the wire hanging platform is slidably mounted on the second guide rails, and a buffer spring is arranged between the slide seat and the wire hanging platform.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The twisted tensile core provides internal support to prevent the elastic tube from being severely squeezed and deformed to block the channel.

[0022] 2. The twisted tensile core forms multiple spiral channels in the elastic tube, so that the air in the elastic tube contacts the surrounding spirals, providing uniform heat dissipation on all sides.

[0023] 3. The elastic tube is covered with vents. When the temperature outside the wiring harness is high or the wire core generates heat, the heat inside the wiring harness will enter the elastic tube through the vents and dissipate heat in the length direction through multiple spiral channels.

[0024] 4. When the wire harness is processed and assembled in batches, both ends of the wire harness terminal can be crimped and formed simultaneously, which is highly efficient.

[0025] 5. It can complete the fully automatic crimping assembly of wiring harness terminals with high precision and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the cross-sectional structure of the wiring harness of the present invention;

[0027] Figure 2 It is a schematic diagram of the side view structure of the elastic tube of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the crimping molding equipment of the present invention before the harness is grabbed from above;

[0029] Figure 4 It is a schematic diagram of the top view of the structure of the crimping molding equipment of the present invention when grabbing the wire harness;

[0030] Figure 5 It is a structural schematic diagram of the crimping and positioning of the wire terminal of the crimping and forming equipment of the present invention;

[0031] Figure 6 It is a front structural schematic diagram of the wire harness head end conveying and positioning mechanism of the present invention;

[0032] Figure 7 It is a schematic diagram of the side structure of the wire harness head end conveying and positioning mechanism and the crimping mechanism of the present invention;

[0033] Figure 8 It is a schematic diagram of the conveyor belt and harness structure of the present invention;

[0034] Figure 9 This is a schematic top view of the wire harness positioning mechanism of the present invention;

[0035] Figure 10 This is a schematic top view of the wire harness positioning mechanism and the terminal conveying and positioning mechanism of the present invention.

[0036] In the figure: 1, wire core; 2, shielding layer; 3, inner sheath; 4, armor layer; 5, high-temperature resistant outer sheath; 6, elastic tube; 7, tensile core; 8, ventilation hole; 9, filler; 10, conveyor belt; 11, wire harness; 12, in-place sensor; 13, first rodless cylinder; 14, first slider; 15, synchronous cylinder; 16, second rodless cylinder; 17, second slider; 18, rotary cylinder; 19, clamping cylinder; 20, clamping jaw; 21, first guide rail; 22, terminal conveying die; 23, terminal; 24, mounting plate; 25, servo cylinder; 26, upper crimping cylinder; 27, upper fixture; 28, lower crimping cylinder; 29, lower fixture; 30, third rodless cylinder; 31, sliding seat; 32, wire hanging platform; 33, blocking plate; 34, second guide rail; 35, buffer spring. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figure 1-2The present invention provides a high temperature resistant wire harness, comprising a wire core 1, a shielding layer 2, an inner sheath 3, an armor layer 4 and a high temperature resistant outer sheath 5, wherein the wire core 1 is provided with a plurality of wire cores, and the plurality of wire cores 1 are twisted along the length direction, and the wire core 1 is twisted along the length direction to enhance flexibility; a tensile core assembly is provided at the center of the plurality of wire cores 1, and the tensile core assembly enhances the durability and tensile resistance of the wire harness as a whole, and provides a heat dissipation channel at the center; the tensile core assembly comprises an elastic tube 6 and an internal tensile core 7, and the tensile core 7 is provided with a plurality of wire cores, and the plurality of tensile cores 7 are twisted along the length direction, and the twisted tensile core 7 cooperates with the wire The harness as a whole is flexible, and the twisted tensile core 7 forms multiple spiral gaps along the length direction; the outer wall of the tensile core 7 is in close contact with the inner wall of the elastic tube 6, so that the tensile core 7 can provide internal stable support for the elastic tube 6. Because the elastic tube 6 must have a certain degree of flexibility to cooperate with the wiring harness, the twisted tensile core 7 provides internal support to prevent the elastic tube 6 from being severely squeezed, deformed and blocked. At the same time, the multiple spiral gaps of the tensile core 7 also form multiple spiral channels in the elastic tube 6, so that the air in the elastic tube 6 is in contact with the surrounding spirals, providing uniform heat dissipation all around. The elastic tube 6 is covered with vents 8, and then the outside of the wiring harness When the temperature is high or the wire core 1 generates heat, the heat inside the wire harness will enter the elastic tube 6 through the vent hole 8, and dissipate heat in the length direction through the multiple spiral channels. Preferably, the wire harness in the high-temperature environment is partially arranged in the low-temperature environment, so that the wire harness can quickly dissipate heat from the high-temperature section to the low-temperature section in the length direction; in addition, as a preferred embodiment, a terminal with a vent hole can be selected, so that the multiple spiral channels in the elastic tube 6 are connected to the outside at both ends, and the heat inside the wire harness can be quickly dissipated through the air flowing through the spiral channels of the elastic tube 6. The tensile core 7 is made of a heat-conducting material, and the heat-conducting tensile core 7 is further The step is conducive to the heat dissipation inside the wire harness; the wire core 1 is coated with the shielding layer 2, which can block the interference of the external electromagnetic field and reduce or eliminate the interference of the internal signal of the cable; the wire core 1 and the shielding layer 2 are filled with a filler 9, and the filler 9 is used to protect the wire harness to prevent it from being damaged or deformed, and at the same time increase the stability and hardness of the wire harness; the shielding layer 2 is covered with the inner sheath 3, the inner sheath 3 is covered with the armor layer 4, and the armor layer 4 is covered with the high temperature resistant outer sheath 5, and the sheath and the armor layer can be used to enhance the mechanical strength and durability, heat resistance and corrosion resistance of the wire harness.

[0039] See also Figure 1-2 , the elastic tube 6 is a silicone tube; in this embodiment, the silicone tube has excellent high temperature resistance and corrosion resistance, and can also provide stable elastic support for the wire core 1, so that the wire core 1 has a certain elastic buffer space.

[0040] See also Figure 1, the tensile core 7 is made of aluminum alloy; in this embodiment, while the aluminum alloy tensile core 7 has high tensile strength, it also has excellent heat dissipation performance.

[0041] Please refer to Figure 1 , three tensile cores 7 are provided; in this embodiment, the three tensile cores 7 satisfy the stranding and supporting of the elastic tube 6 while also ensuring a relatively large spiral gap channel.

[0042] Please refer to Figures 3-7 , the present invention provides a wire harness terminal crimping and forming device based on the high-temperature resistant wire harness described in any one of the above, including a wire harness conveying mechanism, a wire harness head end conveying and positioning mechanism, a terminal conveying and positioning mechanism, and a crimping mechanism. The wire harness after wire stripping at both ends is conveyed by the wire harness conveying mechanism. After the wire harness arrives, the two ends of the wire harness are clamped by the wire harness head end conveying and positioning mechanism and conveyed to the crimping mechanism. At the same time, the terminal conveying and positioning mechanism conveys two terminals from the other side to the crimping mechanism, and the synchronous crimping of both ends of the wire harness is completed by the crimping mechanism;

[0043] The wire harness conveying mechanism includes a conveyor belt 10 on which a wire harness 11 is conveyed. An in-place sensor 12 is provided on the conveyor belt 10. The conveying of multiple wire harnesses 11 placed at intervals is completed by the conveyor belt 10. After the in-place sensor 12 detects that the wire harness 11 to be pressed is in place, the conveyor belt 10 stops conveying;

[0044] The wire harness head-end conveying and positioning mechanism includes two parallel first rodless cylinders 13 perpendicular to the conveyor belt 10. A first slider 14 is installed on the first rodless cylinder 13, and a synchronous cylinder 15 is installed on the top of each first slider 14. The top ends of the piston rods of the two synchronous cylinders 15 are mounted with a rodless cylinder assembly parallel to the conveyor belt 10. The rodless cylinder assembly includes two second rodless cylinders 16 symmetrically arranged from the middle. A second slider 17 is respectively controlled below the second rodless cylinder 16. The second slider 17 extends a certain length in the direction of the conveyor belt 10 and is equipped with a reversely placed rotary cylinder 18. The piston rod of the rotary cylinder 18 penetrates through the second slider 17 and is equipped with a clamping cylinder 19. Two clamping jaws 20 are installed below the clamping cylinder 19. By synchronously driving the two first sliders 14 to slide through the two first rodless cylinders 13, the second rodless cylinder 16, the second slider 17, the clamping cylinder 19 and the clamping jaws 20 can be moved above the set wire harness 11. Then the synchronous cylinder 15 drives the second rodless cylinder 16 and the clamping cylinder 19 and the clamping jaws 20 thereon to descend. After descending to the set height, the clamping cylinder 19 controls the two clamping jaws 20 to clamp both ends of the wire harness 11 and expose the wire ends for docking of the wire harness 11. Then the synchronous cylinder 15 drives the second rodless cylinder 16 and the wire harness 11 to rise, and the first rodless cylinder 13 controls the first slider 14 to drive the wire harness 11 to move towards the crimping station. During this period, the two second rodless cylinders 16 control the two second sliders 17 to move closer to the center, and the two rotary cylinders 18 rotate 90 degrees in opposite directions to fold the two wire ends of the wire harness 11 towards the terminals 23 of the terminal conveying and positioning mechanism;

[0045] The terminal conveying and positioning mechanism includes two parallel first guide rails 21 opposite to the conveyor belt 10 and located between the two first rodless cylinders 13. A terminal conveying die 22 is installed on the first guide rail 21. Two terminal placement cavities are provided on the side of the terminal conveying die 22 facing the conveyor belt 10, and terminals 23 are placed therein. An installation plate 24 is provided between the two first guide rails 21, and a servo cylinder 25 is installed on the installation plate 24. When the wire harness head-end conveying and positioning mechanism conveys the wire ends to the crimping station, the servo cylinder 25 of the terminal conveying and positioning mechanism drives the terminal conveying die 22 to convey the terminals 23 to the crimping station from the other side along the first guide rail 21, and the docking of the wire ends at both ends of the wire harness 11 and the two terminals 23 is completed from both sides;

[0046] The crimping mechanism includes an upside-down upper crimping cylinder 26 mounted on the second slider 17. The piston rod of the upper crimping cylinder 26 penetrates through the second slider 17 and is equipped with an upper clamp 27. On one side of the terminal conveying and positioning mechanism, there are two upward lower crimping cylinders 28. The top of the piston rod of the lower crimping cylinder 28 is equipped with a lower clamp 29. After the wire ends at both ends of the wire harness 11 are docked with the two terminals 23, the upper crimping cylinder 26 drives the upper clamp 27 to move downward, and the lower crimping cylinder 28 drives the lower clamp 29 to move upward to complete the crimping and forming of the wire harness terminals. Then, the crimping mechanism resets. The clamping cylinder 19 controls the jaws 20 to release the wire harness 11 and then takes out the wire harness 11. The same principle can be used to automatically crimp and form the terminals of the next wire harness.

[0047] Please refer to Figure 8 , the conveyor belt 10 is a V-shaped conveyor belt with a V-shaped groove in the middle of the top surface; in this embodiment, the design of the V-shaped groove enables the conveyor belt 10 to convey the wire harness 11 while positioning the side of the wire harness 11, which is beneficial for subsequent precise clamping.

[0048] Please refer to Figures 9-10 , a wire harness positioning mechanism is installed between the two first rodless cylinders 13. The wire harness positioning mechanism includes a third rodless cylinder 30. A sliding seat 31 is arranged on the third rodless cylinder 30. A wire hanging platform 32 is installed on the sliding seat 31. A blocking plate 33 is arranged at the top of the wire hanging platform 32; in this embodiment, when the wire harness 11 moves towards the crimping station and the two rotary cylinders 18 fold the two wire ends of the wire harness 11, since the wire ends move towards the center and the wire harness body lacks restraint, it will sag. By setting the wire hanging platform 32 and the blocking plate 33, and driving the sliding seat 31 towards the crimping station through the third rodless cylinder 30, the wire harness 11 can be placed on the wire hanging platform 32 when the wire harness 11 moves towards the crimping station. Limited by the wire hanging platform 32, the wire harness will not sag. At the same time, during the whole process of the jaws 20 driving the wire ends of the wire harness to fold, the blocking plate 33 positions the wire harness body so that the whole wire harness will not sag.

[0049] Please refer to Figures 9-10 , the length of the blocking plate 33 is designed according to the distance between the wire harnesses when the two ends of the wire harness 11 are crimped; in this embodiment, when the jaws 20 fold the head end of the wire harness 11 and dock, the blocking plate 33 can correct the distance between the wire harnesses 11, which is beneficial for it to be accurately aligned with the terminal 23.

[0050] Please refer to Figures 9-10 , the two ends of the blocking plate 33 close to the conveyor belt 10 are arc-shaped structures; in this embodiment, the design of the arc-shaped structure is beneficial for the bending fit of the wire harness 11 and avoids damaging the wire harness 11.

[0051] Please refer to Figures 9-10, two parallel second guide rails 34 are arranged on the sliding seat 31, the wire hanging table 32 is slidably mounted on the second guide rails 34, and a buffer spring 35 is arranged between the sliding seat 31 and the wire hanging table 32; in this embodiment, since it is very difficult for the third rodless cylinder 30 to drive the sliding seat 31 to move towards the crimping station in synchronization with the first rodless cylinder 13, the buffer spring 35 can facilitate the elastic tension of the wire harness 11 by the blocking plate 33.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A terminal crimping and forming device for a high-temperature resistant wire harness, characterized in that It includes a wire harness conveying mechanism, a wire harness head end conveying and positioning mechanism, a terminal conveying and positioning mechanism, and a crimping mechanism; The wire harness conveying mechanism includes a conveyor belt (10) on which a wire harness (11) is conveyed, and a position sensor (12) is provided on the conveyor belt (10); The wire harness head end conveying and positioning mechanism includes two parallel first rodless cylinders (13) arranged perpendicular to the conveyor belt (10). A first slider (14) is installed on the first rodless cylinder (13). Synchronous cylinders (15) are installed on the top of the first slider (14). A rodless cylinder assembly parallel to the conveyor belt (10) is installed on the top ends of the piston rods of the two synchronous cylinders (15). The rodless cylinder assembly includes two second rodless cylinders (16) symmetrically arranged from the middle. Second sliders (17) are respectively controlled below the second rodless cylinders (16). The second sliders (17) extend a certain length in the direction of the conveyor belt (10) and are equipped with a reversely placed rotary cylinder (18). The piston rod of the rotary cylinder (18) penetrates through the second slider (17) and is equipped with a clamping cylinder (19). Two clamping jaws (20) are installed below the clamping cylinder (19); The terminal conveying and positioning mechanism includes two parallel first guide rails (21) arranged opposite to the conveyor belt (10) and located between the two first rodless cylinders (13). A terminal conveying die (22) is installed on the first guide rail (21). Two terminal placement cavities are provided on the side of the terminal conveying die (22) facing the conveyor belt (10) for placing terminals (23). An installation plate (24) is provided between the two first guide rails (21), and a servo cylinder (25) is installed on the installation plate (24); The crimping mechanism includes an upper crimping cylinder (26) reversely placed on the second slider (17). The piston rod of the upper crimping cylinder (26) penetrates through the second slider (17) and is equipped with an upper fixture (27). Two upward lower crimping cylinders (28) are provided on one side of the terminal conveying and positioning mechanism. The top end of the piston rod of the lower crimping cylinder (28) is equipped with a lower fixture (29); A wire harness positioning mechanism is installed between the two first rodless cylinders (13). The wire harness positioning mechanism includes a third rodless cylinder (30). A sliding seat (31) is arranged on the third rodless cylinder (30). A wire hanging platform (32) is installed on the sliding seat (31), and a blocking plate (33) is provided on the top of the wire hanging platform (32); The two ends of the blocking plate (33) close to the conveyor belt (10) are arc-shaped structures; Two parallel second guide rails (34) are arranged on the sliding seat (31). The wire hanging platform (32) is slidably installed on the second guide rail (34), and a buffer spring (35) is arranged between the sliding seat (31) and the wire hanging platform (32).

2. The terminal crimping and forming device for a high-temperature resistant wire harness according to claim 1, characterized in that, The conveyor belt (10) is a V-shaped conveyor belt with a V-shaped groove in the middle of the top surface.

3. The terminal crimping and forming equipment for a high-temperature resistant wire harness according to claim 1, characterized in that, The length of the blocking plate (33) is designed according to the distance between the wire harnesses when the two ends of the wire harness (11) are crimped.

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