A pneumatically controlled wire harness terminal crimping device

Abstract

This invention relates to the field of wire harness terminal crimping technology, specifically to a pneumatically controlled wire harness terminal crimping device. The device includes a crimping device body, with a cylinder assembly fixedly mounted on its upper end. A lifting plate is fixedly connected to the output end of the cylinder assembly. A pneumatic-hydraulic braking mechanism is connected to the upper surface of the lifting plate. The pneumatic-hydraulic braking mechanism includes a mounting top plate and a base mounting seat. A controller is mounted on the upper surface of the base mounting seat. The advantages are: the crimping operation of the wire harness terminal is achieved by controlling the lifting plate downwards to press the die seat through the cylinder assembly. The pneumatic-hydraulic braking mechanism added to both sides of the cylinder assembly utilizes the principle of pneumatic-hydraulic linkage, satisfying both automatic continuous lifting in case of accidental cylinder assembly failure and limiting the lifting plate's movement during normal use, preventing the lifting plate from rapidly ejecting in case of crimping failure.

Description

Technical Field

[0001] This invention relates to the field of wire harness terminal crimping technology, specifically to a wire harness terminal crimping device controlled by pneumatics. Background Technology

[0002] Pneumatic technology is a specialized technology that uses compressed air as a medium to transmit and control machinery. It utilizes an air compressor to compress air and store it in an air tank, and then delivers the compressed air through pipelines to pneumatic actuators (such as cylinders, air motors, etc.) to drive them to perform linear or rotary motion, thereby realizing various process actions. Pneumatically controlled wire harness terminal crimping equipment can achieve precise pressure and displacement control, ensuring the connection quality of terminals and wires. By adjusting the air pressure and cylinder stroke, the pressure and crimping depth during the crimping process can be precisely controlled to avoid problems such as incomplete connections or over-crimping.

[0003] In the prior art, such as the wire harness terminal crimping device disclosed in CN115473102A, which relates to the technical field of wire harness processing, a processing base, a lower crimping die, a wire harness limiting component, a crimping drive component, and an upper crimping die are disclosed. The limiting plate and spring of the wire harness limiting component can crimp each wire harness separately, avoiding the simultaneous crimping of multiple wire harnesses and the resulting separation of the terminal from the wire harness before crimping. Then, the second cylinder, drive plate, and upper crimping die of the crimping drive component crimp the terminal onto the wire harness, thereby improving the crimping effect between the terminal and the wire harness.

[0004] However, in actual use, a pneumatic control method is used to crimp the terminals to the wire harness. But if the cylinder is damaged and the crimping fails, the equipment will not be able to continue crimping, resulting in equipment downtime for maintenance and reduced production efficiency.

[0005] Therefore, this invention proposes a pneumatically controlled wire harness terminal crimping device to solve the problem that in existing equipment, if the cylinder is damaged and crimping fails, the equipment will be unable to continue crimping, and the upper crimping plate will quickly separate from the lower crimping plate, posing a significant safety hazard and causing equipment downtime for maintenance. The device can provide emergency braking and continuous pressure maintenance between the lifting plate and the lower crimping mold base in the case of crimping failure, reducing equipment downtime for maintenance and minimizing safety hazards. Summary of the Invention

[0006] The purpose of this invention is to provide a pneumatically controlled wire harness terminal crimping device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pneumatically controlled wire harness terminal crimping device, comprising a crimping device body, a cylinder assembly fixedly mounted on the upper end of the crimping device body, a lifting plate fixedly connected to the output end of the cylinder assembly, a pneumatic-hydraulic braking mechanism connected to the upper surface of the lifting plate, the pneumatic-hydraulic braking mechanism comprising a mounting top plate and a base mounting seat, a controller mounted on the upper surface of the base mounting seat, a hydraulic cylinder provided on the inner surface of the base mounting seat, guide support columns slidably connected to the inner walls of the four corners of the lifting plate, the two ends of the guide support columns being fixedly connected to the inner walls of the crimping device body, an upper crimping mold seat fixedly connected directly below the lifting plate, a lower crimping mold seat provided directly below the upper crimping mold seat, and the lower crimping mold seat fixedly mounted on the inner bottom surface of the crimping device body.

[0008] Preferably, the upper top surface of the pressing equipment body is provided with a square groove, the inner surface of the square groove is fixedly connected to the outer surface of the base mounting seat, the base mounting seat is a square column structure, and two sets of base mounting seats are provided and symmetrically distributed about the central longitudinal axis of the mounting top plate. The mounting top plate is fixedly installed on the inner top surface of the pressing equipment body.

[0009] Preferably, the cylinder assembly includes a cylinder body shell, with an upper cylinder head and a lower cylinder head fixedly connected to both ends of the cylinder body shell, a miniature pressure sensor mounted on the top surface of the upper cylinder head, and a sealing ring fixedly connected to the inner surface of the lower cylinder head, the inner ring surface of the sealing ring being movably connected to the outer surface of the main piston rod.

[0010] Preferably, a main piston is slidably connected to the inner surface of the cylinder shell, a main piston rod is fixedly connected to one end of the main piston, and the outer surface of the output end of the main piston rod is fixedly connected to the upper surface of the lifting plate.

[0011] Preferably, a flange is fitted on the outer surface of the oil cylinder, and the outer surface of the flange is fixedly connected to the top surface of the base mounting seat by bolts. A top cover is fixedly installed at the upper end of the oil cylinder, and an oil guide pipe is connected through the inner wall of the upper end of the top cover. A solenoid valve is provided on the inner surface of the oil guide pipe.

[0012] Preferably, a fixed circular plate is fixedly installed on the upper inner wall of the oil cylinder, an oil guide hole is opened on the inner surface of the fixed circular plate, and a sealing column is fixedly installed on the lower surface of the fixed circular plate. There are three sets of the oil guide hole and the sealing column, and the three sets of the oil guide hole and the sealing column are arranged in a circular array.

[0013] Preferably, the lower surface of the fixed circular plate is provided with a receiving groove, the inner surface of the receiving groove is fixedly connected with a telescopic spring, the lower end of the telescopic spring is fixedly connected with a movable circular plate, and the outer surface of the movable circular plate is slidably connected to the inner surface of the oil cylinder.

[0014] Preferably, the lower surface of the fixed circular plate is provided with a reserved groove, and an electromagnetic ring is fixedly installed on the upper surface of the movable circular plate. The outer surface of the electromagnetic ring is movably engaged with the inner surface of the reserved groove, and the electromagnetic ring is electrically connected to the controller.

[0015] Preferably, the inner wall of the movable circular plate is provided with an oil guide hole II, and a sealing post II is fixedly installed on the upper surface of the movable circular plate. The outer surface of the sealing post II is movably inserted into the inner surface of the oil guide hole I, and the inner surface of the oil guide hole II is movably inserted into the outer surface of the sealing post I.

[0016] Preferably, a secondary piston is slidably connected to the lower inner wall of the oil cylinder, a secondary piston rod is fixedly connected to the lower end of the secondary piston, a sealing ring is slidably installed on the outer surface of the secondary piston rod, the sealing ring is fixedly installed on the inner wall of the mounting top plate, and the lower outer surface of the secondary piston rod is fixedly connected to the upper surface of the lifting plate.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention proposes a pneumatically controlled wire harness terminal crimping device. The device uses a cylinder assembly to control a lifting plate to move downwards towards the crimping die, achieving the crimping operation of the wire harness terminals. It employs a pneumatic-hydraulic braking mechanism on both sides of the cylinder assembly, utilizing the principle of pneumatic-hydraulic linkage. This mechanism not only satisfies the need for automatic continuous lifting in case of cylinder assembly failure but also provides limit control of the lifting plate's movement during normal use, preventing the lifting plate from rapidly ejecting in the event of crimping failure. This invention solves the problem in existing equipment where cylinder damage leads to crimping failure, causing the equipment to be unable to continue crimping and resulting in rapid separation of the upper and lower crimping plates, posing a significant safety hazard and requiring equipment downtime for maintenance. The device provides emergency braking and continuous pressure maintenance between the lifting plate and the lower crimping die in the event of crimping failure, reducing equipment downtime and safety hazards. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a front view of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the crimping device body of the present invention;

[0022] Figure 4This is a half-sectional structural diagram of the connection between the pneumatic-hydraulic braking mechanism and the cylinder assembly of the present invention.

[0023] Figure 5 This is a partial cross-sectional structural diagram of the pneumatic-hydraulic braking mechanism of the present invention;

[0024] Figure 6 For the present invention Figure 5 A magnified structural diagram at point A;

[0025] Figure 7 This is a schematic diagram of the structure of the fixed circular plate and the movable circular plate in the separated state of the present invention;

[0026] Figure 8 This is a schematic diagram of the combined structure of the fixed circular plate and the movable circular plate of the present invention.

[0027] In the diagram: 1. Crimping equipment body; 11. Guide support column; 12. Lifting plate; 121. Upper crimping mold base; 13. Lower crimping mold base; 2. Cylinder assembly; 21. Cylinder shell; 211. Upper cylinder cover; 212. Lower cylinder cover; 2121. Sealing ring; 22. Main piston; 221. Main piston rod; 3. Square groove; 4. Mounting top plate; 41. Foundation mounting base; 411. Controller; 42. Hydraulic oil tank; 421. Top cover; 422. Oil guide pipe; 43. Fixed circular plate; 431. Oil guide hole one; 432. Sealing column one; 44. Movable circular plate; 441. Sealing column two; 442. Oil guide hole two; 430. Receiving groove; 45. Telescopic spring; 451. Electromagnetic ring; 452. Reserved groove; 46. Auxiliary piston; 461. Auxiliary piston rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1, please refer to Figure 1 - Figure 8This invention provides a technical solution: a pneumatically controlled wire harness terminal crimping device, comprising a crimping device body 1, characterized in that: a cylinder assembly 2 is fixedly installed at the upper end of the crimping device body 1, a lifting plate 12 is fixedly connected to the output end of the cylinder assembly 2, a pneumatic-hydraulic braking mechanism is connected to the upper surface of the lifting plate 12, the pneumatic-hydraulic braking mechanism includes a mounting top plate 4 and a base mounting seat 41, a controller 411 is installed on the upper surface of the base mounting seat 41, a hydraulic cylinder 42 is provided on the inner surface of the base mounting seat 41, guide support columns 11 are slidably connected to the inner walls of the four corners of the lifting plate 12, the two ends of the guide support columns 11 are respectively fixedly connected to the inner wall of the crimping device body 1, an upper crimping mold seat 121 is fixedly connected directly below the lifting plate 12, a lower crimping mold seat 13 is provided directly below the upper crimping mold seat 121, and the lower crimping mold seat 13 is fixedly installed on the inner bottom surface of the crimping device body 1.

[0030] In Example 2, based on Example 1, in order to achieve pneumatic lifting control of the lifting plate 12: the cylinder assembly 2 includes a cylinder shell 21, with an upper cylinder cover 211 and a lower cylinder cover 212 fixedly connected to both ends of the cylinder shell 21. A miniature pressure sensor is installed on the upper top surface of the upper cylinder cover 211, and a sealing ring 2121 is fixedly connected to the inner surface of the lower cylinder cover 212. The inner ring surface of the sealing ring 2121 is movably connected to the outer surface of the main piston rod 221. A main piston 22 is slidably connected to the inner surface of the cylinder shell 21, and a main piston rod 221 is fixedly connected to one end of the main piston 22. The outer surface of the output end of the main piston rod 221 is fixedly connected to the upper surface of the lifting plate 12.

[0031] When the crimping operation of the wire harness terminal is achieved through pneumatic control, gas is introduced through the air inlet on one side of the upper cylinder head 211. The gas enters the internal cavity of the cylinder assembly 2, driving the main piston 22 and the main piston rod 221 to move. At this time, the lifting plate 12 connected to the output end of the main piston rod 221 descends vertically. With the diagonal setting of the guide support column 11, the lifting plate 12 is stably limited during its rise and fall. Thus, the descent of the lifting plate 12 can drive the lower upper crimping mold base 121 to crimp the wire harness terminal supported on the lower crimping mold base 13. It should be noted that the specific model of this miniature pressure sensor is MS5803-14BA, the electrical connection type is surface mount, and it is ceramic packaged.

[0032] In Example 3, based on Example 2, to achieve the installation of the pneumatic-hydraulic braking mechanism and avoid downtime caused by unexpected failure of the cylinder assembly 2: a square groove 3 is provided on the top surface of the pressing equipment body 1. The inner surface of the square groove 3 is fixedly connected to the outer surface of the base mounting seat 41. The base mounting seat 41 has a square columnar structure, and two sets of base mounting seats 41 are provided and symmetrically distributed about the central longitudinal axis of the mounting top plate 4. The mounting top plate 4 is fixedly installed on the inner top surface of the pressing equipment body 1; a flange is fitted on the outer surface of the hydraulic cylinder 42, and the outer surface of the flange is fixedly connected to the top surface of the base mounting seat 41 by bolts. A top cover 421 is fixedly installed on the upper end of the hydraulic cylinder 42, and the upper end of the top cover 421 has an inner... An oil guide pipe 422 is connected through the wall, and a solenoid valve is provided on the inner surface of the oil guide pipe 422. A fixed circular plate 43 is fixedly installed on the upper inner wall of the oil cylinder 42. An oil guide hole 431 is opened on the inner surface of the fixed circular plate 43. A sealing column 432 is fixedly installed on the lower surface of the fixed circular plate 43. There are three sets of oil guide holes 431 and sealing columns 432, and the three sets of oil guide holes 431 and sealing columns 432 are arranged in a circular array. A receiving groove 430 is opened on the lower surface of the fixed circular plate 43. A telescopic spring 45 is fixedly connected to the inner surface of the receiving groove 430. A movable circular plate 44 is fixedly connected to the lower end of the telescopic spring 45. The outer surface of the movable circular plate 44 is slidably connected to the inner surface of the oil cylinder 42.

[0033] When the pneumatic-hydraulic braking mechanism needs to be installed, the base mounting seat 41 is installed through the square groove 3 opened on the top surface of the crimping equipment body 1. The hydraulic cylinder 42 is installed inside the base mounting seat 41 by bolting with a flange. At this time, a U-shaped cavity is formed between the outside of the hydraulic cylinder 42 and the base mounting seat 41. This allows the base mounting seat 41 to assemble the hydraulic cylinder 42 while providing additional protection for the hydraulic cylinder 42. On the one hand, this ensures that the base mounting seat 41 blocks and protects the hydraulic cylinder 42. On the other hand, if the hydraulic cylinder 42 is accidentally broken, the base mounting seat 41 temporarily stores the liquid that leaks from the hydraulic cylinder 42, preventing the liquid from spraying out and causing loss. It should be noted that when the cylinder assembly 2 is in normal working condition, the hydraulic cylinder 42 is in an empty cylinder state. The auxiliary piston rod 461 rises and falls with the lifting plate 12. At this time, the auxiliary piston rod 461 also serves to limit the movement of the lifting plate 12.

[0034] When cylinder assembly 2 suffers accidental damage causing the main piston rod 221 to fail, the miniature pressure sensor accurately determines the cylinder's operating status by detecting internal pressure changes during operation. The miniature pressure sensor then transmits the detection signal to controller 411, which quickly sends a signal to open the solenoid valve inside the oil guide pipe 422. Simultaneously, the electromagnetic ring 451 opens, allowing the external oil pipe to guide oil into the oil cylinder 42 through the oil guide pipe 422. After the electromagnetic ring 451 opens, it repels the pre-reserved groove 452, causing the movable circular plate 44 to separate from the fixed circular plate 43 under electromagnetic influence. The telescopic spring 45 is stretched by the tension of the movable circular plate 44. If the hydraulic oil changes, then at this time, the hydraulic oil at the top of the hydraulic cylinder 42 flows through the first guide hole 431 and the second guide hole 442, and the hydraulic oil smoothly enters the position between the lower end of the movable circular plate 44 and the upper end of the auxiliary piston 46. Thus, the auxiliary piston 46 is pushed by the upper hydraulic oil, which drives the auxiliary piston rod 461 to continuously push the lower lifting plate 12. At this time, even if the lifting plate 12 and the upper pressing mold seat 121 lose pneumatic control, they can still maintain the crimping of the wire harness terminal in time by relying on hydraulic control, avoiding the emergency failure of the wire harness terminal. It can provide emergency braking and continuous pressure maintenance between the lifting plate 12 and the lower pressing mold seat 13 in the crimping failure state, reduce the downtime of equipment maintenance, and reduce safety hazards.

[0035] In Example 4, based on Example 3, to achieve the release of the crimping of the crimped wiring harness terminals: a reserved groove 452 is provided on the lower surface of the fixed circular plate 43, and an electromagnetic ring 451 is fixedly installed on the upper surface of the movable circular plate 44. The outer surface of the electromagnetic ring 451 is movably engaged with the inner surface of the reserved groove 452, and the electromagnetic ring 451 is electrically connected to the controller 411; an oil guide hole 442 is provided on the inner wall of the movable circular plate 44, and a sealing post 441 is fixedly installed on the upper surface of the movable circular plate 44. The outer surface of the second sealing column 441 is movably inserted into the inner surface of the first oil guide hole 431, and the inner surface of the second oil guide hole 442 is movably inserted into the outer surface of the first sealing column 432; a secondary piston 46 is slidably connected to the lower inner wall of the oil cylinder 42, and a secondary piston rod 461 is fixedly connected to the lower end of the secondary piston 46. A sealing ring is slidably installed on the outer surface of the secondary piston rod 461, and the sealing ring is fixedly installed on the inner wall of the mounting top plate 4. The lower outer surface of the secondary piston rod 461 is fixedly connected to the upper surface of the lifting plate 12.

[0036] When the wire harness terminal is crimped without stopping the machine in an emergency, the controller 411 controls the electromagnetic ring 451 to close. At this time, the movable circular plate 44 returns to its initial position due to the rebound force of the telescopic spring 45. The electromagnetic ring 451 is then embedded inside the reserved slot 452. Simultaneously, the telescopic spring 45 retracts to the inside of the receiving slot 430, and the fixed circular plate 43 and the movable circular plate 44 merge. The sealing column 432 and the oil guide hole 442, as well as the oil guide hole 431 and the sealing column 441, are fitted together. At this time, the oil cylinder 42... The hydraulic oil at the bottom cannot return, forming a seal. In this state, the auxiliary piston rod 461 can continuously press against the lifting plate 12. Then, when it is necessary to release the crimping of the wire harness terminal, it is only necessary to control the electromagnetic ring 451 to open again through the controller 411. At this time, the fixed circular plate 43 and the movable circular plate 44 are separated, so that the hydraulic oil inside the hydraulic cylinder 42 can be extracted. Then, the auxiliary piston 46 and the auxiliary piston rod 461 move upward, and drive the upper crimping mold base 121 to release the restriction on the wire harness terminal.

[0037] Example 4: A method of using a pneumatically controlled wire harness terminal crimping device, comprising the following steps:

[0038] Step 1: When performing the crimping operation of the wire harness terminal through pneumatic control, gas is introduced through the air inlet on one side of the upper cylinder head 211. The gas enters the internal cavity of the cylinder assembly 2, driving the main piston 22 and the main piston rod 221 to move. At this time, the lifting plate 12 connected to the output end of the main piston rod 221 descends vertically. With the diagonal setting of the guide support column 11, the lifting plate 12 is stably limited during its rise and fall. Thus, the descent of the lifting plate 12 can drive the lower upper crimping mold base 121 to crimp the wire harness terminal supported on the lower crimping mold base 13 stably.

[0039] Step 2: When the pneumatic-hydraulic braking mechanism needs to be installed, the base mounting seat 41 is installed through the square groove 3 opened on the top surface of the crimping equipment body 1. The hydraulic cylinder 42 is installed inside the base mounting seat 41 by bolting with a flange. At this time, a U-shaped cavity is formed between the outside of the hydraulic cylinder 42 and the base mounting seat 41. This allows the base mounting seat 41 to assemble the hydraulic cylinder 42 while providing additional protection for the hydraulic cylinder 42. On the one hand, this ensures that the base mounting seat 41 blocks and protects the hydraulic cylinder 42. On the other hand, if the hydraulic cylinder 42 is accidentally broken, the base mounting seat 41 temporarily stores the liquid that leaks from the hydraulic cylinder 42, preventing the liquid from spraying out and causing loss.

[0040] Step 3: If cylinder assembly 2 suffers accidental damage causing the main piston rod 221 to fail, the miniature pressure sensor accurately determines the cylinder's operating status by detecting internal pressure changes during operation. The miniature pressure sensor then transmits the detection signal to controller 411. Controller 411 quickly sends a signal, opening the solenoid valve inside oil guide pipe 422. Simultaneously, solenoid ring 451 opens, allowing the external oil pipe to guide oil into the oil reservoir 42 through oil guide pipe 422. After opening, it repels the reserved slot 452. The movable circular plate 44 is separated from the fixed circular plate 43 by electromagnetic force. The telescopic spring 45 is stretched by the tension of the movable circular plate 44. At this time, the hydraulic oil at the top of the hydraulic cylinder 42 flows through the first guide hole 431 and the second guide hole 442. The hydraulic oil smoothly enters the position between the lower end of the movable circular plate 44 and the upper end of the auxiliary piston 46. Thus, the auxiliary piston 46 is pushed by the upper hydraulic oil, which drives the auxiliary piston rod 461 to continuously push the lower lifting plate 12.

[0041] Step 4: When the wire harness terminal is crimped without stopping the machine in an emergency, the electromagnetic ring 451 is closed by the controller 411. At this time, the movable circular plate 44 is restored to its initial position by the rebound force of the telescopic spring 45. At this time, the electromagnetic ring 451 is embedded in the interior of the reserved groove 452. At the same time, the telescopic spring 45 is retracted to the inside of the receiving groove 430. The fixed circular plate 43 and the movable circular plate 44 are merged. The sealing column 432 and the oil guide hole 442, as well as the oil guide hole 431 and the sealing column 441 are fitted and installed. At this time, the hydraulic oil at the bottom of the hydraulic cylinder 42 cannot return, forming a seal. In this state, the auxiliary piston rod 461 can continuously press the lifting plate 12.

[0042] Step 5: When it is necessary to release the crimping of the wire harness terminal, simply control the electromagnetic ring 451 to open again via the controller 411. At this time, the fixed circular plate 43 and the movable circular plate 44 will separate, thus extracting the hydraulic oil inside the hydraulic cylinder 42. Subsequently, the auxiliary piston 46 and the auxiliary piston rod 461 will move upward, thereby driving the upper crimping mold base 121 to release the restriction on the wire harness terminal.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatically controlled wire harness terminal crimping device, comprising a crimping device body (1), characterized in that: A cylinder assembly (2) is fixedly installed on the upper end of the pressing equipment body (1). A lifting plate (12) is fixedly connected to the output end of the cylinder assembly (2). A pneumatic-hydraulic braking mechanism is connected to the upper surface of the lifting plate (12). The pneumatic-hydraulic braking mechanism includes a mounting top plate (4) and a base mounting seat (41). A controller (411) is installed on the upper surface of the base mounting seat (41). A hydraulic cylinder (42) is provided on the inner surface of the base mounting seat (41). Guide support columns (11) are slidably connected to the inner walls of the four corners of the lifting plate (12). The two ends of the guide support columns (11) are fixedly connected to the inner wall of the pressing equipment body (1). An upper pressing mold seat (121) is fixedly connected directly below the lifting plate (12). A lower pressing mold seat (13) is provided directly below the upper pressing mold seat (121). The lower pressing mold seat (13) is fixedly installed on the inner bottom surface of the pressing equipment body (1). The outer surface of the oil cylinder (42) is fitted with a flange, and the outer surface of the flange is fixedly connected to the top surface of the base mounting seat (41) by bolts. A top cover (421) is fixedly installed at the upper end of the oil cylinder (42), and an oil guide pipe (422) is connected through the inner wall of the upper end of the top cover (421). A solenoid valve is provided on the inner surface of the oil guide pipe (422). A fixed circular plate (43) is fixedly installed on the upper inner wall of the oil cylinder (42). An oil guide hole (431) is opened on the inner surface of the fixed circular plate (43). A sealing column (432) is fixedly installed on the lower surface of the fixed circular plate (43). There are three sets of oil guide holes (431) and sealing columns (432), and the three sets of oil guide holes (431) and sealing columns (432) are arranged in a circular array. The lower surface of the fixed circular plate (43) is provided with a receiving groove (430), and a telescopic spring (45) is fixedly connected to the inner surface of the receiving groove (430). The lower end of the telescopic spring (45) is fixedly connected to a movable circular plate (44), and the outer surface of the movable circular plate (44) is slidably connected to the inner surface of the oil cylinder (42). The lower surface of the fixed circular plate (43) is provided with a receiving groove (430), and a telescopic spring (45) is fixedly connected to the inner surface of the receiving groove (430). The lower end of the telescopic spring (45) is fixedly connected to a movable circular plate (44), the outer surface of the movable circular plate (44) is slidably connected to the inner surface of the oil cylinder (42); the lower surface of the fixed circular plate (43) is provided with a reserved groove (452), and an electromagnetic ring (451) is fixedly installed on the upper surface of the movable circular plate (44). The outer surface of the electromagnetic ring (451) is movably engaged with the inner surface of the reserved groove (452), and the electromagnetic ring (451) is electrically connected to the controller (411). The inner wall of the movable circular plate (44) is provided with an oil guide hole 2 (442), and a sealing column 2 (441) is fixedly installed on the upper surface of the movable circular plate (44). The outer surface of the sealing column 2 (441) is movably inserted into the inner surface of the oil guide hole 1 (431), and the inner surface of the oil guide hole 2 (442) is movably inserted into the outer surface of the sealing column 1 (432). A secondary piston (46) is slidably connected to the lower inner wall of the oil cylinder (42). A secondary piston rod (461) is fixedly connected to the lower end of the secondary piston (46). A sealing ring is slidably installed on the outer surface of the secondary piston rod (461). The sealing ring is fixedly installed on the inner wall of the mounting top plate (4). The lower outer surface of the secondary piston rod (461) is fixedly connected to the upper surface of the lifting plate (12).

2. The pneumatically controlled wire harness terminal crimping device according to claim 1, characterized in that: The upper top surface of the pressing equipment body (1) is provided with a square groove (3). The inner surface of the square groove (3) is fixedly connected to the outer surface of the base mounting seat (41). The base mounting seat (41) has a square column structure. The base mounting seat (41) is provided with two sets and is symmetrically distributed about the central longitudinal axis of the mounting top plate (4). The mounting top plate (4) is fixedly installed on the inner top surface of the pressing equipment body (1).

3. The pneumatically controlled wire harness terminal crimping device according to claim 1, characterized in that: The cylinder assembly (2) includes a cylinder shell (21), with an upper cylinder head (211) and a lower cylinder head (212) fixedly connected to both ends of the cylinder shell (21). A miniature pressure sensor is installed on the top surface of the upper cylinder head (211), and a sealing ring (2121) is fixedly connected to the inner surface of the lower cylinder head (212). The inner ring surface of the sealing ring (2121) is movably connected to the outer surface of the main piston rod (221).

4. The pneumatically controlled wire harness terminal crimping device according to claim 3, characterized in that: The inner surface of the cylinder shell (21) is slidably connected to a main piston (22), and one end of the main piston (22) is fixedly connected to a main piston rod (221). The outer surface of the output end of the main piston rod (221) is fixedly connected to the upper surface of the lifting plate (12).

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