Precise stranding device for multi-core lead of automobile wire harness

Abstract

The invention belongs to the technical field of wire harness processing in automobile manufacturing and related part production, and particularly relates to an automobile wire harness multi-core wire precise stranding device. Comprising a base, a supporting frame, a first guide cylinder, a rotating disc, a supporting column, a supporting cylinder, a first limiting assembly, a plurality of supporting plates, a plurality of lifting plates, a plurality of driving assemblies, a plurality of pressing and locking assemblies, a plurality of wire assemblies and a plurality of second limiting assemblies. The supporting frame is fixedly installed on the top side of the base, the first guide cylinder is fixedly installed on the supporting frame, the supporting column is rotatably installed on the top side of the base, the supporting cylinder is fixedly installed on the supporting column in the radial direction, and the rotating disc is rotatably installed on the supporting cylinder in the axial direction. The device is reasonable in design, the wire roller can be quickly and flexibly disassembled and assembled conveniently, meanwhile, the stability of the wire roller in the working process can be guaranteed, the stranding efficiency of the multi-core wire of the automobile wire harness can be improved, the use stability of the device can be improved, and the service life of the device can be prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of wire harness processing in automobile manufacturing and related parts production, and in particular to a multi-core wire precision twisting device for automobile wire harnesses. Background Art

[0002] In the field of automotive wiring harness production, the quality of multi-core wire twisting technology is directly related to the reliability and stability of the automotive electrical system. However, the traditional multi-core wire twisting device exposes many problems that need to be solved.

[0003] In traditional devices, wire rollers generally adopt a passive pay-off mode. In this way, the pay-off of the wire rollers is completely dependent on the traction of the twisting device, and it is impossible to flexibly and accurately adjust the pay-off speed according to the actual twisting process and needs. In actual production, this defect makes it extremely difficult to control the tension of the wire harness, and uneven tension often occurs. When the tension is too large, the wire is over-pulled and easily broken, resulting in material waste and production interruption; when the tension is too small, it will lead to insufficient pay-off, making the wire harness loose and not tight, seriously affecting its electrical performance and burying safety hazards for the automotive electrical system.

[0004] Furthermore, the traditional device has major drawbacks in the disassembly and assembly of the wire roller. The fixing and installation process of the wire roller is extremely cumbersome and complicated, requiring operators to invest a lot of time and energy, and often requires the use of multiple tools and numerous operating steps. Not only that, the stability of the wire roller after installation is poor. During the twisting process, due to factors such as the vibration of the device, the wire roller is very likely to shake, which not only further reduces the twisting accuracy, but also may cause the wire to be tangled and chaotic, greatly affecting production efficiency and product quality. What is more difficult is that the existing device is seriously lacking in flexibility in structural design, and it is difficult for operators to conveniently disassemble and assemble the wire roller from different directions. This is particularly inconvenient when it is necessary to frequently replace the wire roller or adjust the production layout, which greatly limits the improvement of production efficiency.

[0005] In summary, the existing automotive wiring harness multi-core wire twisting technology has obvious shortcomings in wire pay-off control and the convenience of wire roller disassembly and assembly. Innovative precision twisting devices are urgently needed to break these technical bottlenecks and promote the efficient and high-quality development of the automotive wiring harness production industry. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings mentioned in the above background technology and to propose a multi-core wire precision twisting device for automobile wiring harnesses.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: A precision twisting device for multi-core wires of an automobile wiring harness, comprising a base, a support frame, a guide cylinder 1, a turntable, a support column, a support cylinder, a limit assembly 1, a plurality of support plates, a plurality of lifting plates, a plurality of drive assemblies, a plurality of pressing and locking assemblies, a plurality of wire assemblies and a plurality of limit assemblies 2;

[0008] The support frame is fixedly mounted on the top side of the base, the guide cylinder 1 is fixedly mounted on the support frame, the support column is rotatably mounted on the top side of the base, the support cylinder is radially fixedly mounted on the support column, the turntable is axially rotatably mounted on the support cylinder, and the limit assembly 1 is arranged on the support column and connected to the base;

[0009] One side of the turntable is radially provided with a plurality of guide grooves based on the support cylinder as the center, a plurality of support plates are fixedly installed on one side of the turntable and respectively adapted to the corresponding guide grooves, a plurality of drive components are respectively arranged on the corresponding support plates, a plurality of lifting plates are respectively slidably installed in the corresponding guide grooves, an electric cylinder is fixedly installed on the plurality of support plates, and the working end of the electric cylinder is fixedly connected to the corresponding lifting plate;

[0010] Multiple pressing and locking components are respectively arranged on the side of the multiple lifting plates away from each other and are adapted to the corresponding driving components, multiple wire components are respectively arranged on the side of the corresponding lifting plates away from the turntable, multiple guide grooves are each provided with a strip opening, and multiple limit components are respectively arranged on the side of the multiple lifting plates close to the turntable and are adapted to the corresponding strip openings.

[0011] Preferably, the limiting component 1 includes a mounting seat, a rotating pin, a torsion spring, a strip plate and a plurality of slots, the mounting seat is fixedly mounted on the support column, the mounting seat is rotatably mounted with a rotating pin, the strip plate is radially fixedly mounted on the rotating pin, a plurality of slots are provided on the top side of the base based on the support column as the center, one end of the strip plate away from the mounting seat is snap-mounted in the corresponding slot, a mounting groove is provided on the strip plate based on the rotating pin as the center, a torsion spring is fixedly mounted in the mounting groove based on the rotating pin as the center, and the torsion spring is fixedly connected to the mounting seat.

[0012] Preferably, a handle is fixedly mounted on the top side of the strip plate.

[0013] Preferably, the driving assembly comprises a servo motor and a support plate, the servo motor is fixedly mounted on a side of the support plate away from the lifting plate, and the support plate is axially fixedly connected to an output shaft of the servo motor.

[0014] Preferably, the pressing and locking assembly includes a support shaft, a sliding sleeve, a plurality of support rods, a plurality of support bars and a buffer spring. The support shaft is rotatably installed on the side of the lifting plate close to the support plate, the sliding sleeve is slidably installed on the support shaft, a plurality of support rods are hingedly installed on the sliding sleeve, a plurality of support bars are hingedly installed on one end of the plurality of support rods away from the sliding sleeve, the plurality of support bars are arranged parallel to each other, and a buffer spring movably mounted on the outside of the support shaft is fixedly installed on the bottom side of the sliding sleeve.

[0015] Preferably, the pressing and locking assembly also includes a limit plate and a plurality of sliding rods. The outer fixed sleeve of the support shaft is provided with a limit plate. The limit plate and the support plate are both provided with a plurality of guide openings based on the support shaft. A plurality of sliding rods are radially fixedly installed in the guide opening on the limit plate based on the support shaft. The plurality of support bars are respectively slidably connected to the corresponding sliding rods, and the plurality of support bars are all adapted to the guide opening on the support plate.

[0016] Preferably, the wire assembly includes an L-shaped plate, a columnar block and two guide cylinders, the L-shaped plate is fixedly installed on the side of the lifting plate away from the turntable, the columnar block is rotatably installed on the L-shaped plate, and the two guide cylinders are radially fixedly installed on the columnar block.

[0017] Preferably, the second limit assembly includes a fixed rod, a mounting block, a push spring and an electromagnet. A fixed rod is fixedly installed on the side of the lifting plate close to the turntable, the fixed rod passes through the strip-shaped opening and is fixedly installed with a mounting block, a limit block is slidably sleeved on the fixed rod, and the same push spring that is movably sleeved on the outside of the fixed rod is fixedly installed between the limit block and the mounting block. A plurality of limit grooves arranged at equal intervals are opened in the strip opening, the limit block is snap-fitted and installed in the corresponding limit grooves, an electromagnet is fixedly installed on the side of the mounting block away from the turntable, and the limit block is made of magnetic material.

[0018] Preferably, a guide rod is fixedly installed in the guide groove, and the guide rod is slidably connected to the lifting plate.

[0019] Preferably, a shell is fixedly mounted on the support column, a plurality of support wheels are rotatably mounted in the shell, an annular groove is provided on one side of the turntable close to the support column, and the plurality of support wheels are all rollingly mounted in the annular groove.

[0020] The beneficial effects of the present invention are:

[0021] The drive component is set up to provide drive for the corresponding wire roller and can control the speed of wire release according to actual conditions, ensuring that the tension of the wire harness is moderate and avoiding the problem of excessive pulling or insufficient wire release. The wire roller can be quickly fixed and locked by the cooperation of the set pressure holding locking component and the electric cylinder, and the wire roller can be quickly disassembled and assembled conveniently. By adopting the setting method of rotating the support column on the base, the wire roller can be easily disassembled and assembled from different directions. The support column can be limited by the set limit component to avoid the support column from self-deflecting during work, and it is convenient to quickly release the limit state of the support column, thereby facilitating the efficient twisting of multi-core wires of the automotive wiring harness.

[0022] The wire assembly provided can provide stable guidance for the wire bundle released by the wire roller. At the same time, the limit assembly 2 provided can lock the lifting plate after the wire roller is installed in place, so as to prevent the lifting plate and other components from exerting all their weight on the electric cylinder due to centrifugal force when the turntable rotates, thereby effectively improving the service life of the electric cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a multi-core wire precision twisting device for an automobile wiring harness proposed by the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0026] Figure 3 for Figure 1 Schematic diagram of the local three-dimensional structure;

[0027] Figure 4 for Figure 3 Schematic diagram of the local three-dimensional structure;

[0028] Figure 5 This is a schematic diagram of the structure of the pressing and locking assembly proposed by the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the strip plate, rotating pin, mounting slot, torsion spring and handle part proposed by the present invention;

[0030] Figure 7 This is a schematic cross-sectional structural diagram of the turntable proposed in the present invention.

[0031] In the figure: 1. base; 11. support frame; 12. guide cylinder 1; 2. support column; 21. support cylinder; 22. strip plate; 221. rotating pin; 222. torsion spring; 223. slot; 3. turntable; 301. shell; 302. support wheel; 303. annular groove; 31. guide groove; 32. strip mouth; 33. limit groove; 4. support plate; 41. support plate; 42. servo motor; 5. lifting plate; 501. guide rod; 51. support shaft; 511. sliding sleeve; 512. support rod; 513. support strip; 514. limit plate; 515. buffer spring; 52. fixing rod; 521. mounting block; 522. limit block; 523. push spring; 524. electromagnet; 53. L-shaped plate; 531. columnar block; 532. guide cylinder 2; 6. electric cylinder. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Reference Figure 1-7 A multi-core wire precision twisting device for automobile wiring harnesses includes a base 1, a support frame 11, a guide cylinder 12, a turntable 3, a support column 2, a support cylinder 21, a limit assembly 1, a plurality of support plates 4 and a plurality of lifting plates 5. The support frame 11 is fixedly mounted on the top side of the base 1, the guide cylinder 12 is fixedly mounted on the support frame 11, the support column 2 is rotatably mounted on the top side of the base 1, the support cylinder 21 is radially fixedly mounted on the support column 2, the turntable 3 is axially rotatably mounted on the support cylinder 21, a mounting seat is fixedly mounted on the support column 2, a rotating pin 221 is rotatably mounted on the mounting seat, and a strip plate 22 is radially fixedly mounted on the rotating pin 221 The top side of the base 1 is provided with a plurality of slots 223 based on the support column 2 as the center, and one end of the strip plate 22 away from the mounting seat is snap-fitted and mounted in the corresponding slot 223. A mounting slot is provided on the strip plate 22 based on the rotation pin 221 as the center, and a torsion spring 222 is fixedly installed in the mounting slot based on the rotation pin 221 as the center, and the torsion spring 222 is fixedly connected to the mounting seat, so that the strip plate 22 can be automatically snapped into the corresponding slot 223 and achieve a limiting effect when the strip plate 22 is not controlled. In order to facilitate the operator to control the strip plate 22 to deflect based on the rotation pin 221 as the center, a handle is fixedly installed on the top side of the strip plate 22;

[0034] One side of the turntable 3 is radially provided with a plurality of guide grooves 31 based on the support cylinder 21 as the center, and a plurality of support plates 4 are fixedly installed on one side of the turntable 3 and are respectively adapted to the corresponding guide grooves 31. A servo motor 42 is fixedly installed on the side of the support plate 4 away from the lifting plate 5. The output shaft of the servo motor 42 is axially fixedly connected with the support plate 41, which can provide support for the wire roller and control it to rotate and pay off the wire. The plurality of lifting plates 5 are respectively slidably installed in the corresponding guide grooves 31, wherein, in order to ensure that the lifting plate 5 maintains stable sliding in the guide groove 31, a guide rod 501 is fixedly installed in the guide groove 31, and the guide rod 501 is slidably connected to the lifting plate 5. The plurality of support plates 4 are fixedly installed with electric cylinders 6, and the working end of the electric cylinder 6 is fixedly connected to the corresponding lifting plate 5;

[0035] A support shaft 51 is rotatably installed on one side of the lifting plate 5 close to the support plate 4, a sliding sleeve 511 is slidably installed on the support shaft 51, a plurality of support rods 512 are hingedly installed on the sliding sleeve 511, a plurality of support bars 513 are hingedly installed on one end of the plurality of support rods 512 away from the sliding sleeve 511, and the plurality of support bars 513 are arranged parallel to each other, and a buffer spring 515 movably sleeved on the outside of the support shaft 51 is fixedly installed on the bottom side of the sliding sleeve 511, which can control the plurality of support bars 513 to move in a direction away from the support shaft 51 when the electric cylinder 6 controls the lifting plate 5 to approach the support plate 4 and makes the buffer spring 515 abut against the support plate 41. In this way, the wire roller can be locked. A limit plate 514 is provided on the outer fixed sleeve of the support shaft 51. A plurality of guide openings are provided on the limit plate 514 and the support plate 41 based on the support shaft 51 as the center. A plurality of sliding rods are fixedly installed radially in the guide openings on the limit plate 514 based on the support shaft 51 as the center. The plurality of support bars 513 are slidably connected to the corresponding sliding rods respectively, and the plurality of support bars 513 are all adapted to the guide openings on the support plate 41, and can cooperate with the support bars 513 to realize the clamping operation of the wire roller, thereby ensuring the stability of the wire roller after installation, and also facilitating its rapid disassembly.

[0036] An L-shaped plate 53 is fixedly installed on one side of the lifting plate 5 away from the turntable 3, a columnar block 531 is rotatably installed on the L-shaped plate 53, and a guide cylinder 532 is radially fixedly installed on the columnar block 531, which can provide a guiding effect for the wire harness released from the wire roller;

[0037] A plurality of guide grooves 31 are provided with strip openings 32, a fixing rod 52 is fixedly installed on the side of the lifting plate 5 close to the turntable 3, the fixing rod 52 passes through the strip opening 32 and is fixedly installed with a mounting block 521, a limiting block 522 is slidably sleeved on the fixing rod 52, a push spring 523 movably sleeved on the outside of the fixing rod 52 is fixedly installed between the limiting block 522 and the mounting block 521, a plurality of limiting grooves 33 arranged at equal intervals are provided in the strip opening 32, the limiting blocks 522 are snap-fitted and installed in the corresponding limiting grooves 33, and the mounting block 5 An electromagnet 524 is fixedly installed on the side away from the turntable 3 21, and the limit block 522 is made of magnetic material, which can limit the lifting plate 5 after the electric cylinder 6 adjusts it to the desired position, so as to prevent the lifting plate 5 from always acting on the electric cylinder 6 due to the centrifugal force when the turntable 3 rotates, thereby improving the service life of the electric cylinder 6. At the same time, when the position of the lifting plate 5 needs to be adjusted by the electric cylinder 6, the electromagnet 524 can be controlled to suck the limit block 522 out of the limit groove 33, so that the limit state of the lifting plate 5 can be quickly released.

[0038] In this embodiment, in order to provide support for the turntable 3 and thereby enable it to maintain stable rotation, a shell 301 is fixedly installed on the support column 2, and a plurality of support wheels 302 are rotatably installed in the shell 301. An annular groove 303 is provided on the side of the turntable 3 close to the support column 2, and the plurality of support wheels 302 are all rollingly installed in the annular groove 303.

[0039] The circuits, electronic components and module structures involved all adopt existing technologies, which can be fully implemented by those skilled in the art. Needless to say, the content protected by this application does not involve improvements to software, circuits and methods.

[0040] Working principle: When in use, first turn on the power supply, pull the strip plate 22 upwards by the handle to disengage the strip plate 22 from the slot 223, then adjust the turntable 3 to a direction that is convenient for replacing and installing the wire roller by rotating the support column 2, and then release the strip plate 22. Under the action of the torsion spring 222, the strip plate 22 can be snapped into the corresponding slot 223 and the support column 2 is limited. The electromagnet 524 is started, so that the limit block 522 can be sucked out of the limit slot 33 and the push spring 523 is compressed. Then, the electric cylinder 6 is used to control the lifting plate 5 to move in the direction close to the support tube 21, and the wire roller to be installed is placed in the center position on the support disk 41. Then, the electric cylinder 6 is used to control the lifting plate 5 to move in the direction close to the support plate 4. When the buffer spring 515 abuts against the support plate 4 After that, the sleeve 511 will be controlled to slide on the support shaft 51, so that the multiple support bars 513 can be controlled to provide a locking effect for the line roller from the inside with the cooperation of the multiple support rods 512. As the limit plate 514 continues to approach the line roller, the line roller can be further locked under the action of the buffer spring 515, thereby ensuring the stability of the line roller during operation. After the lifting plate 5 is adjusted to the right position, the solenoid valve is closed, and the limit block 522 can be inserted into the corresponding limit groove 33 under the action of the push spring 523, thereby avoiding the situation where the lifting plate 5 and other components will exert all the force on the electric cylinder 6 when the turntable 3 rotates, thereby affecting the service life of the electric cylinder 6. Then, after the multiple line rollers are installed on the corresponding support plates 4 in the above manner, the support column 2 and the turntable 3 are reset and their self-rotation is restricted.

[0041] The free end of the wire harness on the wire roller is passed through the corresponding guide cylinder 2 532 and converged to the position of guide cylinder 12, and then extended rightward from guide cylinder 12 to the position of the wire harness twisting processing. While the wire harness is twisting, the pay-off speed of the wire roller is controlled by the servo motor 42 to avoid excessive pulling of the wire harness due to excessive or insufficient pay-off. The setting of guide cylinder 2 532 can provide guidance for the wire harness to avoid damage caused by abnormal scratches on the wire harness.

[0042] The above is a detailed introduction to a multi-core wire precision twisting device for automotive wiring harnesses provided by the present invention. Specific embodiments are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A precision twisting device for multi-core wires of automobile wiring harness, characterized in that: It comprises a base (1), a support frame (11), a guide cylinder (12), a turntable (3), a support column (2), a support cylinder (21), a first limiter assembly, a plurality of support plates (4), a plurality of lifting plates (5), a plurality of drive assemblies, a plurality of pressing and locking assemblies, a plurality of wire assemblies and a plurality of second limiter assemblies; The support frame (11) is fixedly mounted on the top side of the base (1), the guide cylinder (12) is fixedly mounted on the support frame (11), the support column (2) is rotatably mounted on the top side of the base (1), the support cylinder (21) is radially fixedly mounted on the support column (2), the turntable (3) is axially rotatably mounted on the support cylinder (21), and the limit assembly (1) is arranged on the support column (2) and connected to the base (1); One side of the turntable (3) is radially provided with a plurality of guide grooves (31) based on the support cylinder (21) as the center; a plurality of support plates (4) are fixedly mounted on one side of the turntable (3) and are respectively adapted to the corresponding guide grooves (31); a plurality of drive components are respectively arranged on the corresponding support plates (4); a plurality of lifting plates (5) are respectively slidably mounted in the corresponding guide grooves (31); an electric cylinder (6) is fixedly mounted on the plurality of support plates (4), and a working end of the electric cylinder (6) is fixedly connected to the corresponding lifting plate (5); The plurality of pressing and locking assemblies are respectively arranged on the side of the plurality of lifting plates (5) away from each other and are matched with the corresponding driving assemblies, the plurality of wire assemblies are respectively arranged on the side of the corresponding lifting plates (5) away from the turntable (3), the plurality of guide grooves (31) are each provided with a strip-shaped opening (32), and the plurality of limit assemblies are respectively arranged on the side of the plurality of lifting plates (5) close to the turntable (3) and are matched with the corresponding strip-shaped opening (32).

2. The multi-core wire precision twisting device for automobile wiring harness according to claim 1, characterized in that: The first limiting component comprises a mounting seat, a rotating pin (221), a torsion spring (222), a strip plate (22) and a plurality of slots (223); the mounting seat is fixedly mounted on the support column (2); the rotating pin (221) is rotatably mounted on the mounting seat; the strip plate (22) is radially fixedly mounted on the rotating pin (221); a plurality of slots (223) are provided on the top side of the base (1) based on the support column (2) as the center; one end of the strip plate (22) away from the mounting seat is snap-fitted into the corresponding slot (223); a mounting slot is provided on the strip plate (22) based on the rotating pin (221) as the center; a torsion spring (222) is fixedly mounted in the mounting slot based on the rotating pin (221) as the center; and the torsion spring (222) is fixedly connected to the mounting seat.

3. The multi-core wire precision twisting device for automobile wiring harness according to claim 2, characterized in that: A handle is fixedly mounted on the top side of the strip plate (22).

4. The multi-core wire precision twisting device for automobile wiring harness according to claim 1, characterized in that: The driving assembly comprises a servo motor (42) and a support plate (41); the servo motor (42) is fixedly mounted on a side of the support plate (4) away from the lifting plate (5); and the support plate (41) is axially fixedly connected to an output shaft of the servo motor (42).

5. The multi-core wire precision twisting device for automobile wiring harness according to claim 1, characterized in that: The pressing and locking assembly comprises a support shaft (51), a sliding sleeve (511), a plurality of support rods (512), a plurality of support strips (513) and a buffer spring (515); a support shaft (51) is rotatably mounted on a side of the lifting plate (5) close to the support plate (4); a sliding sleeve (511) is slidably mounted on the support shaft (51); a plurality of support rods (512) are hingedly mounted on the sliding sleeve (511); a plurality of support strips (513) are hingedly mounted on one end of the plurality of support rods (512) away from the sliding sleeve (511); the plurality of support strips (513) are arranged parallel to each other; a buffer spring (515) movably mounted on the outside of the support shaft (51) is fixedly mounted on the bottom side of the sliding sleeve (511).

6. A multi-core wire precision twisting device for automotive wiring harnesses according to any one of claims 4 and 5, characterized in that: The pressing and locking assembly also includes a limit plate (514) and a plurality of sliding rods. The outer fixed sleeve of the support shaft (51) is provided with a limit plate (514). The limit plate (514) and the support plate (41) are both provided with a plurality of guide openings based on the support shaft (51) as the center. A plurality of sliding rods are fixedly installed radially in the guide opening on the limit plate (514) based on the support shaft (51) as the center. The plurality of support bars (513) are respectively slidably connected to the corresponding sliding rods, and the plurality of support bars (513) are all adapted to the guide opening on the support plate (41).

7. The multi-core wire precision twisting device for automobile wiring harness according to claim 1, characterized in that: The wire assembly comprises an L-shaped plate (53), a columnar block (531) and a second guide cylinder (532); the L-shaped plate (53) is fixedly mounted on a side of the lifting plate (5) away from the rotating disk (3); the columnar block (531) is rotatably mounted on the L-shaped plate (53); and the second guide cylinder (532) is radially fixedly mounted on the columnar block (531).

8. The multi-core wire precision twisting device for automobile wiring harness according to claim 1, characterized in that: The second limiting assembly comprises a fixed rod (52), a mounting block (521), a push spring (523) and an electromagnet (524); a fixed rod (52) is fixedly mounted on a side of the lifting plate (5) close to the turntable (3); the fixed rod (52) passes through the strip-shaped opening (32) and is fixedly mounted with the mounting block (521); a limiting block (522) is slidably sleeved on the fixed rod (52); a push spring (523) movably sleeved on the outside of the fixed rod (52) is fixedly mounted between the limiting block (522) and the mounting block (521); a plurality of limiting grooves (33) arranged at equal intervals are provided in the strip-shaped opening (32); the limiting block (522) is snap-fitted and mounted in the corresponding limiting grooves (33); an electromagnet (524) is fixedly mounted on a side of the mounting block (521) away from the turntable (3); and the limiting block (522) is made of magnetic material.

9. The multi-core wire precision twisting device for automobile wiring harness according to claim 1, characterized in that: A guide rod (501) is fixedly installed in the guide groove (31), and the guide rod (501) is slidably connected to the lifting plate (5).

10. The multi-core wire precision twisting device for automobile wiring harness according to claim 1, characterized in that: A housing (301) is fixedly mounted on the support column (2), a plurality of support wheels (302) are rotatably mounted in the housing (301), an annular groove (303) is provided on one side of the turntable (3) close to the support column (2), and the plurality of support wheels (302) are all rollingly mounted in the annular groove (303).

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