Mechanism for controlling crimping amount of contact body and wire

Abstract

A mechanism for controlling the crimping amount of a contact body and a wire is composed of a servo motor, a screw, a motor base, a coupler, a worm base, a worm, a worm gear, a torque sensor, a connecting plate, a supporting shaft, a supporting shaft base, a flat head screw, a detection piece and a photoelectric induction switch. And under the combined action of the torque sensor, the crimping jaw is controlled and driven to crimp the contact body and the wire, so that the problem of'overvoltage 'or'undervoltage' after the contact body and the wire are crimped due to the fact that an existing crimping device cannot adapt to dimensional tolerance changes of the contact body and the wire can be solved, and the crimping quality and reliability of the contact body and the wire are improved.

Description

Technical Field

[0001] The utility model relates to a mechanism for controlling the crimping amount of a contact body and a wire, and is mainly applicable to the crimping process of a contact body and a wire in the connector industry. Background Art

[0002] Connectors are widely used in aviation, aerospace, electronics, communications and other fields. The most commonly used methods for connecting connector contacts (pins, sockets) to wires are welding and crimping. Crimping electrical connectors have the characteristics of reliable contact, high contact density, high degree of versatility, a full range of models, small size, light weight, and easy installation and use. At the same time, in terms of environmental resistance, they are resistant to high and low temperatures, moisture, and space radiation, and have gradually become the mainstream method for connecting connector wires to contacts.

[0003] The contact and wire crimping process involves reshaping the wire barrel portion of the contact body around the wire through pressure deformation, permanently crimping the wire to the terminal to form a good electrical and mechanical connection. Connector contacts and wires are typically crimped using wire crimping pliers or automatic wire crimping equipment. To ensure reliable crimping between the contact and wire, the amount of crimping deformation must be determined based on the dimensions of the contact barrel and the wire. Wire crimping pliers control the crimping end position of the crimping jaws using gears, while automatic wire crimping equipment controls the crimping end position of the crimping jaws using a servo motor. For a contact and wire of a certain specification, the crimping end position of the crimping jaws of existing crimping devices can only be set to a fixed position, resulting in a fixed amount of crimping between the contact and wire.

[0004] However, in actual production, due to the dimensional tolerances between the contact barrel aperture and the conductor core outer diameter, when using existing crimping mechanisms, when the contact barrel aperture is at the upper limit and the conductor core outer diameter is at the lower limit, an "undervoltage" phenomenon may occur: that is, the conductor barrel and conductor core deform too little during crimping, resulting in low tensile strength after crimping the contact and conductor, high on-resistance, and failure to meet design specifications. When the contact barrel aperture is at the lower limit and the conductor core outer diameter is at the upper limit, an "overvoltage" phenomenon may occur: that is, excessive deformation of the contact barrel and conductor core during crimping, making wire breakage very likely even under low tensile forces. Although the probability of these situations occurring is low, for applications such as aviation and aerospace that require high connector quality reliability, "overvoltage" or "undervoltage" between the contact and conductor can have very serious or even catastrophic consequences. Utility Model Content

[0005] The purpose of the utility model is to provide a mechanism for controlling the crimping amount between the contact body and the wire, which can solve the problem that the existing wire crimping mechanism cannot adapt to the dimensional tolerance of the hole diameter of the contact body crimping barrel and the outer diameter of the wire core, resulting in "overpressure" or "underpressure" after the contact body and the wire are crimped, thereby effectively improving the crimping quality and reliability of the contact body and the wire.

[0006] The technical solution adopted by the utility model is: a mechanism for controlling the amount of crimping between a contact body and a wire, the mechanism for controlling the amount of crimping between the contact body and the wire being composed of a servo motor, a screw, a motor seat, a coupling, a worm seat, a worm, a worm wheel, a torque sensor, a connecting plate, a support shaft, a support shaft seat, a flat head screw, a detection piece, a set screw, and a photoelectric sensor switch. The flange on one side of the torque sensor is fixed to the connecting plate and the rotating sleeve in the crimping jaw assembly by screws, and the flange on the other side of the torque sensor is fixed to the worm gear by screws. The inner holes of the connecting plate, torque sensor, worm gear, and rotating sleeve all pass through the support shaft and match with a small gap in the outer circle of the support shaft. The flat end of the support shaft is fixed to the square countersunk hole on the support shaft seat by a flat head screw, and the other end is connected to the jaw fixing seat in the crimping jaw assembly with screws and pins. A worm is provided under the worm wheel, and the worm teeth in the middle of the worm are engaged with the worm gear teeth distributed along the circumference of the worm wheel. The outer circles of both ends of the worm pass through the worm seat and match with a small gap in the worm fixing hole of the worm seat. The outer circle of one end exposed to the worm seat is connected to the servo motor through a coupling, and the servo motor is fixed to the motor seat by screws. A detection piece is installed on the outer circle of the other end of the worm exposed to the worm seat and fastened with a set screw. A photoelectric sensor switch is provided directly below the detection piece, and the photoelectric sensor switch is fastened to the worm seat with screws. The circular flange in the middle of the detection piece is located in the groove of the photoelectric sensor switch. The detection piece and the photoelectric sensor switch are used to return the servo motor to the zero position after the crimping is completed.

[0007] Based on the above, the rotation centers of the torque sensor, the connecting plate, the worm gear and the rotating sleeve are coaxial, and the rotation centers of the worm and the servo motor main shaft are coaxial.

[0008] Based on the above, the rotation centers of the torque sensor, the connecting plate, the worm gear, and the rotating sleeve are perpendicular to the rotation centers of the worm and the servo motor spindle.

[0009] Based on the above, the servo motor drives the worm to rotate, and the worm drives the worm wheel, torque sensor, connecting plate, and rotating sleeve to rotate. Under the joint action of the torque sensor, the crimping jaws are controlled and driven to crimp the contact body and the wire.

[0010] The beneficial effect of the present invention is that, by adopting the mechanism of the present invention for controlling the crimping amount between the contact body and the wire, when the contact body and the wire are crimped, the torque value detected and controlled by the torque sensor is set to a certain suitable fixed value according to the specifications of the contact body and the wire, the feed rotation angle of the servo motor is set to a certain suitable value range, and the servo motor and the torque sensor jointly control the crimping amount between the contact body and the wire, so that the crimping amount can be changed in real time according to the change of the tolerance of the contact body wire barrel and the wire core size, avoiding the "undervoltage" or "overvoltage" phenomenon caused by the dimensional tolerance matching limit during crimping, and effectively improving the crimping quality and reliability of the contact body and the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of a mechanism for controlling the crimping amount between a contact body and a wire in the utility model;

[0012] Figure 2 is a schematic diagram of the support shaft structure;

[0013] Figure 3 It is a schematic diagram of the support shaft seat structure;

[0014] Figure 4 It is a schematic diagram of the detection piece and photoelectric sensor switch structure.

[0015] Figure 5 It is a schematic diagram of the structure of the crimping jaw assembly.

[0016] In the figure: 1. Servo motor, 2. screw, 3. motor seat, 4. coupling, 5. worm seat, 6. worm, 7. worm gear, 8. screw, 9. screw, 10. torque sensor, 11. connecting plate, 12. crimping jaw assembly, 13. support shaft, 14. support shaft seat, 15. flat head screw, 16. worm seat, 17. detection plate, 18. set screw, 19. photoelectric sensor switch, 20. screw, 121. rotating sleeve, 122. crimping jaw, 123. jaw fixing seat, 124. screw, 125 pin. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figure 1-5As shown, the utility model provides a technical solution: a mechanism for controlling the amount of crimping between a contact body and a wire, the mechanism for controlling the amount of crimping between a contact body and a wire comprising a servo motor 1, a screw 2, a motor seat 3, a coupling 4, a worm seat 5, a worm 6, a worm wheel 7, a screw 8, a screw 9, a torque sensor 10, a connecting plate 11, a support shaft 13, a support shaft seat 14, a flat head screw 15, a worm seat 16, a detection piece 17, a set screw 18, a photoelectric sensor switch 19, and a screw 20. The flange 10a on one side of the torque sensor 10 is fixed to the connecting plate 11 and the rotating sleeve 121 in the crimping jaw assembly 12 by screws 9. The flange 10b on the other side of the torque sensor 10 is fixed to the worm gear 7 by screws 8. The inner holes of the connecting plate 11, the torque sensor 10, the worm gear 7 and the rotating sleeve 121 all pass through the support shaft 13 and fit with a small gap with the outer circle 13a of the support shaft 13. The flat end 13b of the support shaft 13 is fixed to the square countersunk hole 14a on the support shaft seat 14 by a flat head screw 15. The other end 13c is connected to the jaw fixing seat 123 in the crimping jaw assembly 12 by screws 124 and pins 125. A worm 6 is provided below the worm gear 7. The worm teeth in the middle of worm 6 mesh with the circumferentially distributed worm gear teeth of worm wheel 7. The outer diameters of both ends of worm 7 pass through worm seat 5 and worm seat 6, and fit with a small gap in the worm fixing holes of worm seat 5 and worm seat 6. The outer diameter of the end exposed from worm seat 5 is connected to servo motor 1 via coupling 4. Servomotor 1 is fixed to motor seat 3 via screws 2. A detection plate 17 is mounted on the outer diameter of the other end of worm 6 exposed from worm seat 16 and fastened with set screws 18. A photoelectric switch 19 is located directly below detection plate 17. Photoelectric switch 19 is fastened to worm seat 16 with screws 20. The circular flange 17a in the middle of detection plate 17 is located in slot 19a of photoelectric switch 19. Detection plate 17 and photoelectric switch 19 are used to return servo motor 1 to its zero position after crimping.

[0019] Preferably, the rotation centers of the torque sensor 10, the connecting plate 11, the worm wheel 7, and the rotating sleeve 121 are coaxial, and the rotation centers of the worm 6 and the main shaft of the servo motor 1 are coaxial.

[0020] Preferably, the rotation centers of the torque sensor 10, the connecting plate 11, the worm gear 7, and the rotating sleeve 121 are perpendicular to the rotation centers of the worm 6 and the main shaft of the servo motor 1.

[0021] Preferably, the servo motor 1 drives the worm 6 to rotate, and the worm 6 drives the worm wheel 7, the torque sensor 10, the connecting plate 11, and the rotating sleeve 121 to rotate. Under the joint action of the torque sensor 10, the rotating sleeve 121 is controlled and driven to rotate, and the crimping jaws 122 are controlled and driven to crimp the contact body and the wire.

[0022] Working principle: The mechanism of the utility model for controlling the crimping amount of the contact body and the wire is adopted. When the contact body and the wire are crimped, the torque value detected and controlled by the torque sensor 10 is set to a certain suitable fixed value according to the specifications of the contact body and the wire, and the feed rotation angle of the servo motor 1 is set to a certain suitable value range. Since the crimping amount of the contact body and the wire is determined by the end position of the crimping jaws 122, the end position of the crimping jaws 122 depends on the rotation angle of the rotating sleeve 121, and the rotation angle of the rotating sleeve 121 depends on the feed rotation angle of the main shaft of the servo motor 1, the rotation angle is set to a suitable value range by considering the contact body wire barrel and the tolerance matching limit of the wire core size. At the same time, due to the torque The sensor 10 is connected to the rotating sleeve 121 through the screws 9 and the connecting plate 11. The torque sensor 10 can sense the torque of the rotating sleeve 121 pushing the crimping jaws 122 when the contact body and the wire are crimped. There is a direct correspondence between the torque and the crimping force applied by the crimping jaws 122 to the contact body and the wire. Whether the torque value detected by the torque sensor 10 reaches the set value is used as the judgment condition for whether the main shaft of the servo motor 1 continues to rotate and feed, so that the crimping amount can be changed in real time according to the change of the contact body wire barrel and the dimensional tolerance of the wire core, thereby avoiding "undervoltage" or "overvoltage" due to the limit of dimensional tolerance during crimping, and effectively improving the crimping quality and reliability of the contact body and the wire.

Claims

1. A mechanism for controlling the amount of crimping between a contact body and a wire, the mechanism comprising a servo motor, a screw, a motor seat, a coupling, a worm seat, a worm, a worm gear, a torque sensor, a connecting plate, a support shaft, a support shaft seat, a flat head screw, a detection sheet, and a photoelectric sensor switch. The flange on one side of the torque sensor is fixed to the connecting plate and the rotating sleeve in the crimping jaw assembly by screws, and the flange on the other side of the torque sensor is fixed to the worm gear by screws. The inner holes of the connecting plate, the torque sensor, the worm gear, and the rotating sleeve all pass through the support shaft and fit with a small clearance on the outer circle of the support shaft. The flat end of the support shaft is fixed to a square countersunk on the support shaft seat by a flat head screw. The worm gear is fixed to the worm seat with a screw and a pin in the hole, and the other end is connected to the jaw fixing seat in the crimping jaw assembly with a screw and a pin. A worm is provided under the worm wheel, and the worm teeth in the middle of the worm gear are meshed with the worm gear teeth distributed along the circumference of the worm wheel. The outer circles at both ends of the worm gear pass through the worm seat and fit with a small gap in the worm fixing hole of the worm seat. The outer circle of one end exposed to the worm seat is connected to the servo motor through a coupling. The servo motor is fixed to the motor seat with screws. A detection piece is installed on the outer circle of the other end of the worm gear exposed to the worm seat and fastened with a set screw. A photoelectric sensor switch is provided just below the detection piece, and the photoelectric sensor switch is fastened to the worm seat with screws. The circular flange in the middle of the detection piece is located in the slot of the photoelectric sensor switch. It is characterized by: The servo motor drives the worm to rotate, and the worm drives the worm wheel, torque sensor, connecting plate, and rotating sleeve to rotate. Under the joint action of the torque sensor, the crimping jaws are controlled and driven to crimp the contact body and wire.

2. The mechanism for controlling the amount of crimping between a contact body and a wire according to claim 1, wherein: The rotation centers of the torque sensor, the connecting plate, the worm gear and the rotating sleeve are coaxial, and the rotation centers of the worm gear and the servo motor main shaft are coaxial.

3. The mechanism for controlling the amount of crimping between a contact body and a wire according to claim 1, wherein: The rotation centers of the torque sensor, the connecting plate, the worm gear and the rotating sleeve are perpendicular to the rotation centers of the worm and the servo motor main shaft.

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