Electric pulling device

Abstract

The invention provides an electric pulling device which comprises a shell, a power supply assembly, a gear motor, a key, a rotating sleeve, a threaded block in threaded connection with the interior of the rotating sleeve, a clamping jaw connected to the lower surface of the threaded block and extending downwards, a guide sleeve connected to the bottom of the shell and extending downwards, and a threaded sleeve in threaded connection with the periphery of the guide sleeve. The connecting rod is in shaft connection with the outer side of the pressing block; and the supporting leg fixing block and the supporting leg are sequentially connected with the lower end of the guide sleeve. According to the invention, the drawing force acts on the central shaft of the connector, so that no radial additional force is generated on the connector when the connector is pulled out, and the damage of the radial plugging force to the connector can be avoided; after the connector is clamped by the clamping jaw, the connector is pulled by the pulling force generated by the motor, the pulling range and stroke are controllable, and a cable connected with the connector and surrounding devices cannot be damaged by pulling; the device is simple and compact in structure, and can be suitable for pulling of direct insertion type connectors of various sizes by replacing the supporting legs, the clamping jaws and the pressing assemblies.

Description

Technical Field

[0001] This invention relates to the field of operation and transportation technology, and specifically to an electric extraction device. Background Technology

[0002] Miniaturization is a development trend in electronic products, and the use of small through-hole connectors (such as SMP connectors and MCX connectors) is becoming increasingly widespread. To ensure reliable connection, these through-hole connectors generally have a semi-escapement or full escapement structure, which requires a relatively large pull-out force after insertion and removal.

[0003] In miniaturized products, space constraints make removing these connectors difficult. Currently, there are two main methods: one is to use a small tool to pry up the connector's tail and pull it out using the force at the tail. This method applies the pulling force to the tail, not directly to the connector's mating axis, resulting in significant torque and potential damage. The other method is to use a simple manual puller provided by the connector manufacturer. However, due to the greater pulling force, manual pulling is difficult to control, easily damaging the connected cables or surrounding components.

[0004] Therefore, there is a need for an electric extraction device that is suitable for use in space-constrained conditions and has high reliability. Summary of the Invention

[0005] This invention addresses the problems of easily damaging the connector, tearing the connecting cable, and damaging surrounding components during the disassembly of existing through-hole connectors. It provides an electric pull-out device where the pulling force acts on the connector's central axis, preventing radial additional force on the connector during removal and avoiding damage from radial insertion / removal forces. After the connector is gripped by the jaws, the pull-out force generated by the motor is used, with controllable pulling range and stroke, preventing damage to the connected cable and surrounding components. This invention features a simple and compact structure, and by changing the legs, jaws, and clamping components, it can be applied to the removal of various sizes of through-hole connectors.

[0006] This invention provides an electric pull-out device, comprising a housing, a power supply component and a geared motor connected in the housing, a button electrically connected to the geared motor and fixed on the housing, a hollow rotating sleeve sleeved outside the output shaft of the geared motor, a threaded block threaded inside the rotating sleeve, a gripper fixedly connected to the lower surface of the threaded block and extending downward, a guide sleeve connected at one end to the bottom of the housing and extending downward, a threaded sleeve threaded to the outer periphery of the guide sleeve, a pressure block sleeved at the lower end of the threaded sleeve, a connecting rod and a pressure rod sequentially axially connected to the outer side of the pressure block, and a support leg fixing block and a support leg sequentially connected to the lower end of the guide sleeve. The guide sleeve is located outside the rotating sleeve, and the pressure block is connected to the lower outer side of the guide sleeve. A guide groove is provided inside the guide sleeve. The grippers pass through the support leg fixing block and the guide groove. There are at least two grippers used to grip the device to be removed. The power supply component supplies power to the geared motor, which drives the rotating sleeve to rotate. The rotating sleeve and the threaded block are driven by a screw. The geared motor drives the rotating sleeve to rotate and causes the threaded block to move the jaws up and down to produce a pulling action or adjust the height of the jaws. The connecting rod and the pressure rod are set in groups of at least two. The outer side of the pressure block is axially connected to one end of the connecting rod, and the other end of the connecting rod is axially connected to one end of the pressure rod. The other end of the pressure rod passes through the support leg and is fixedly connected to the outer side of the gripper. The outriggers are located on the outside of the gripper and have a flat bottom, which can support the electric extraction device to keep it upright.

[0007] In a preferred embodiment of the electric extraction device of the present invention, the number of grippers is two, which are arranged opposite each other, and the grippers are made of spring steel. The gripper includes a gripper body that extends downwardly connected to the lower surface of the threaded block and a gripper portion that extends inwardly connected to the end of the gripper body; The gripper body is curved.

[0008] In a preferred embodiment of the electric extraction device of the present invention, the support leg fixing block is connected to the lower end of the guide sleeve and the bottom is flat; the support leg is two sets of plate-like structures arranged opposite each other, and an opening is provided in the middle of the plate-like structures for the pressure rod to move up and down; the claw part is higher than the bottom surface of the support leg.

[0009] In a preferred embodiment of the electric extraction device described in this invention, the guide sleeve and the threaded sleeve are driven by a helical transmission, which causes the thread of the guide sleeve to rotate and drive the threaded sleeve, the pressure block, and the connecting rod to move up and down.

[0010] In the electric extraction device of the present invention, as a preferred embodiment, the length of the connecting rod is less than the length of the pressure rod.

[0011] In a preferred embodiment of the electric pull-out device described in this invention, the power supply component is a battery and / or a charging printed circuit board.

[0012] In a preferred embodiment of the electric pull-out device of the present invention, the housing comprises a charging housing, a battery housing, and a motor housing connected sequentially from top to bottom; The power supply assembly includes a charging printed circuit board connected in the charging housing and a battery connected in the battery housing. The charging printed circuit board is connected to the battery charging interface and protection circuit. The battery is a regular battery or a rechargeable battery. Both the charging printed circuit board and the battery are connected to the geared motor.

[0013] In a preferred embodiment of the electric pull-out device described in this invention, the button is connected in sequence to the power supply component and the geared motor via two switches. Pressing one end of the button causes the geared motor to rotate forward, and pressing the other end of the button causes the geared motor to rotate in reverse. A geared motor consists of a motor body and a reduction gear set.

[0014] The electric pull-out device of the present invention, in a preferred embodiment, includes the following steps in its method of use: S1. Place the electric extraction device above the device to be extracted and press it against the plane on which the device to be extracted is fixed, so that the device to be extracted is located between the grippers. S2. By pressing the button, the geared motor can be rotated forward or reversed, which will move the gripper up or down to adjust the height of the gripper to the starting groove of the device to be removed. S3. Manually rotate the threaded sleeve to pull the pressure block downward through the screw drive, which drives the connecting rod to press one end of the pressure rod inward. Through the lever, the other end of the pressure rod presses the jaws and grips the device to be removed. S4. Press the button to make the geared motor drive the gripper to move upward and pull out the device to be removed; S5. Manually rotate the threaded sleeve in the reverse direction and pull the pressure block upward, causing the connecting rod to pull one end of the pressure rod inward, so that the jaws release the device to be removed.

[0015] In a preferred embodiment of the electric unplugging device of the present invention, the device to be unplugged is a through-hole connector, which is connected to a through-hole connector socket on a printed circuit board or to a module, and a connecting cable is connected to the tail of the through-hole connector. The connection methods of the through-hole connector can be optical aperture, limited escapement, and full escapement.

[0016] This invention provides an electric pull-out device, comprising a body assembly, an electrical control assembly, a pull assembly, a clamping assembly, and a guide support assembly. The electrical control assembly, pull assembly, clamping assembly, and guide support assembly are mounted on the body assembly. A rechargeable battery in the electrical control assembly powers a geared motor via a button. The rotational motion of the geared motor is converted into linear motion of the grippers via a rotating sleeve and threaded block in the pull assembly, causing the grippers to generate an axial pull-out force on the through-hole connector. The threaded sleeve in the clamping assembly rotates up and down, causing a pressure block to move up and down. The pressure block drives a connecting rod, which pulls a pressure rod, causing the pressure rod to press or release the grippers, thus tightening or loosening the through-hole connector.

[0017] The principle of this invention is as follows: The rechargeable battery in the electronic control component drives the geared motor to rotate forward or backward via a button. The geared motor converts the high-speed rotation of the motor shaft into low-speed rotation through a reduction gear set, and increases the torque of the shaft. The low-speed shaft drives the rotating sleeve of the pull-out assembly to rotate. The rotation of the rotating sleeve drives the threaded block to move linearly, pulling the clamps and generating an axial pull-out force for the direct-insertion connector. The threaded sleeve of the rotating clamping assembly drives the pressure block to move the connecting rod. Through the lever principle, the connecting rod causes the pressure rods on both sides to press the clamps, so that the clamps clamp the connector before it is pulled out. The guide support assembly is the guide groove for the linear movement of the threaded block and the clamps. It also supports the invention on the connector mounting structure or printed circuit board, and reacts the pull-out force generated by the geared motor to the connector mounting structure or printed circuit board. At the same time, combined with the limited stroke of the threaded block, it limits the pull-out range of the connector, preventing damage to the cables connected to the connector or collision with surrounding devices.

[0018] The present invention has the following advantages: The legs and grippers of this invention are small in size, making them suitable for removing plug-in connectors in space-constrained conditions. The pulling force of this invention acts on the central axis of the connector, so no additional radial force is generated on the connector when it is removed, thus avoiding damage to the connector from radial insertion and extraction forces. After the connector is gripped by the grippers, it is removed by the pulling force generated by the motor. The removal range and stroke are controllable, and the cables connected to the connector and surrounding devices will not be damaged. This invention has a simple and compact structure, and by changing the legs, grippers and clamping components, it can be used to remove plug-in connectors of various sizes. Attached Figure Description

[0019] Figure 1 A three-dimensional diagram of an electrically operated extraction device; Figure 2 A three-dimensional sectional view of an electrically operated pull-out device; Figure 3 This is a two-dimensional partial cross-sectional view of an electric extraction device; Figure 4 A three-dimensional diagram of an electric pull-out device for pulling out an SMP elbow; Figure 5 A three-dimensional diagram of an electric pull-out device for pulling out an SMP straight head.

[0020] Figure label: 1. Housing; 1A. Charging housing; 1B. Battery housing; 1C. Motor housing; 2. Power supply assembly; 21. Charging printed circuit board; 22. Battery; 3. Gear motor; 4. Button; 5. Rotating sleeve; 6. Threaded block; 7. Gripper; 71. Gripper body; 72. Gripper part; 8. Guide sleeve; 9. Threaded sleeve; 10. Pressure block; 11. Connecting rod; 12. Pressure rod; 13. Leg fixing block; 14. Leg. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example 1

[0022] like Figures 1-3 As shown, an electric pull-out device comprises a charging housing 1A, a battery housing 1B, a motor housing 1C, a charging printed circuit board 21, a rechargeable battery 22, a geared motor 3, a button 4, a rotating sleeve 5, a threaded block 6, a gripper 7, a guide sleeve 8, a threaded sleeve 9, a pressure block 10, a connecting rod 11, a pressure rod 12, a leg fixing block 13, and a leg 14. The charging housing 1A, battery housing 1B, and motor housing 1C form the housing 1; the charging printed circuit board 21 and rechargeable battery 22 form the power supply assembly 2; the power supply assembly 2, the geared motor 3, and the button 4 form the electronic control assembly; the rotating sleeve 5, threaded block 6, and gripper 7 form the pulling assembly; the threaded sleeve 9, pressure block 10, connecting rod 11, and pressure rod 12 form the clamping assembly; and the guide sleeve 8, leg fixing block 13, and leg 14 form the guiding support assembly.

[0023] like Figure 2 , 3 As shown, a charging printed circuit board 21 is installed inside the charging housing 1A, and it has a battery charging interface and a protection circuit. A rechargeable battery 22 is installed inside the battery housing 1B, providing power to the geared motor 3. A button 4 connects two switches; pressing one end provides positive power from the rechargeable battery 22 to the geared motor 3, causing the motor to rotate in the forward direction; pressing the other end provides reverse power, causing the motor to rotate in the reverse direction. The geared motor 3 includes a motor and a reduction gear set, which converts the high-speed, low-torque output of the motor into a low-speed, high-torque output, providing sufficient pulling force for this invention. A rotating sleeve 5 is directly fitted onto the output shaft of the geared motor 3, with a threaded block 6 mounted on its internal thread and a guide sleeve 8 fitted on its exterior. A gripper 7 is fixed to the threaded block 6 by screws, passes through the guide groove in the guide sleeve 8, and performs a linear pulling motion together with the threaded block 6. A threaded sleeve 9 is installed on the external thread of the guide sleeve 8, with a pressure block 10 fitted underneath it; rotating the sleeve 9 causes the pressure block 10 to move up and down. One end of connecting rod 11 is fixed to pressure block 10, and the other end is fixed to pressure rod 12. The middle part of pressure rod 12 is fixed to support leg fixing block 13, and the other end presses against clamp 7. Rotating sleeve 5 and threaded block 6, threaded sleeve 9 and guide sleeve 8 Both meet the self-locking requirements of screw drives.

[0024] like Figure 2 , 3As shown, pressing button 4 provides positive power to the geared motor 3 via the rechargeable battery 22, which in turn drives the rotating sleeve 5 to rotate in the forward direction. Since the gripper 7, which is fixedly connected to the threaded block 6, passes through the guide groove in the guide sleeve 8, the rotation of the rotating sleeve 5 causes the threaded block 6 and the gripper 7 to move upward, generating a pulling action. Manually rotating the threaded sleeve 9 pushes the pressure block 10 downward, causing the connecting rod 11 to push outward against one end of the pressure rod 12. Through the lever, the other end of the pressure rod 12 presses inward against the gripper 7, causing the gripper 7 to grip the direct-insertion connector.

[0025] like Figure 2 , 3 As shown, when the other end of button 4 is pressed, the rechargeable battery 22 provides reverse power to the geared motor 3. The geared motor 3 drives the rotating sleeve 5 to rotate in the opposite direction. The reverse rotation of the rotating sleeve 5 drives the threaded block 6 and the gripper 7 to move downward, which can adjust the gripper 7 to a suitable height.

[0026] The gripper 7 is made of high-strength spring steel and includes a gripper body 71 and a gripper portion 72. Manually reverse the threaded sleeve 9 and pull the pressure block 10 upward, which drives the connecting rod 11 to pull one end of the pressure rod 12 inward. Through the lever, the other end of the pressure rod 12 releases the gripper 7, so that the gripper 7 releases the clamped straight connector under the action of elasticity.

[0027] In this embodiment, the extraction stroke is 0.5~5cm, the length of the gripper 7 is 10mm~100mm, and the width is 3mm~30mm.

[0028] In use, the support legs 14 are erected around the plug-in connector, resting against the connector mounting structure or printed circuit board. Using button 4, the height of the gripper 7 is adjusted to the connector's pull-out slot. The threaded sleeve 9 is manually rotated downwards to grip the connector. Then, button 4 is pressed to release the plug-in connector electrically. Manually rotating the threaded sleeve 9 upwards releases the gripper 7, completing the entire plug-in connector removal process.

[0029] like Figure 4 As shown, multiple SMP sockets 18 are densely soldered onto the printed circuit board 19, and SMP elbows are plugged into the SMP sockets. Due to space constraints, it is difficult to directly remove the middle SMP elbow. Using this invention, the support leg 14 is placed on the printed circuit board, and the clamp 7 is adjusted to the SMP elbow removal slot position by pressing button 4. The threaded sleeve 9 is manually rotated downwards to make the clamp 7 grip the connector. Then, the button 4 is pressed to remove the removal end, which can easily, stably, efficiently, and safely remove the middle SMP elbow.

[0030] like Figure 5As shown, multiple SMP sockets are embedded in the small module. The SMP straight connectors with cables are plugged into the sockets. Due to space constraints, it is difficult to directly remove the middle SMP straight connector. Using this invention, the plug cable is bent appropriately, the support leg 14 is placed against the outer shell of the small module, the clamp 7 is adjusted to the SMP straight connector removal slot position by button 4, the threaded sleeve 9 is manually rotated downwards to make the clamp 7 grip the connector, and then the button 4 is pressed to remove the middle SMP straight connector. This allows for easy, stable, efficient, and safe removal of the middle SMP straight connector.

[0031] This invention is designed for different sizes of through-hole connectors, and allows for the replacement of legs, jaws, and clamping components of different sizes, making it suitable for removing through-hole connectors of various sizes.

[0032] In this embodiment, the geared motor 3 is an N20 DC geared motor. Depending on the manufacturer, rated voltage, motor model, reduction ratio, etc., its output stall torque, no-load speed, etc., will vary. This invention selects the commonly used N20 DC geared motor, with a rated voltage of 3V and a stall torque of 2.5 kg·cm (0.245 N·m).

[0033] In this invention, the geared motor 3 outputs torque to the rotating sleeve 5. The rotating sleeve 5 drives the threaded block 6 to move linearly through the threaded joint, generating a pull-out force. That is, the output torque of the geared motor 3 generates an axial pull-out force through the threaded joint. The relationship between the threaded torque and the axial force is as follows: T=K×D×F Where T is torque, in N·m; K is torque coefficient, which is generally taken as 0.2 in clean, dry, and unlubricated steel-to-steel connections, dimensionless; D is nominal thread diameter, in m, the nominal thread diameter of this invention is 12mm; F ​​is axial force, in N. The maximum pulling force that this invention can provide is: F1=T÷K÷D=0.245N·m÷0.2÷0.012m=102.8N.

[0034] Considering other frictions in this invention, and taking a margin factor of 1.5, the actual pull-out force that this invention can provide is: F0 = F1 ÷ 1.5 = 68.53 N.

[0035] The separation forces of the SMP connector are: 2.2N for the aperture, 9N for the limited escapement, and 22N for the full escapement.

[0036] The separation force of the SMP connector in full escapement mode is 22N. Considering manufacturing factors, it generally does not exceed 40N, which is less than the pull-out force of 68.53N of this invention. That is, this invention can pull out the SMP connector in full escapement mode.

[0037] This invention provides sufficient pulling force and is applicable to the extraction of other types and sizes of through-hole connectors, such as MMCX (separation force ≥6N) and MCX (separation force ≥20N) connectors.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An electric extraction device, characterized in that: Includes a housing (1), a power supply assembly (2) and a geared motor (3) connected in the housing (1), a button (4) electrically connected to the geared motor (3) and fixed on the housing (1), a hollow rotating sleeve (5) sleeved outside the output shaft of the geared motor (3), a threaded block (6) threaded inside the rotating sleeve (5), a gripper (7) fixedly connected to the lower surface of the threaded block (6) and extending downward, a guide sleeve (8) connected at one end to the bottom of the housing (1) and extending downward, a threaded sleeve (9) threaded to the outer periphery of the guide sleeve (8), a pressure block (10) sleeved at the lower end of the threaded sleeve (9), a connecting rod (11) and a pressure rod (12) sequentially axially connected to the outer side of the pressure block (10), and a support leg fixing block (13) and a support leg (14) sequentially connected to the lower end of the guide sleeve (8). The guide sleeve (8) is located outside the rotating sleeve (5), the pressure block (10) is connected to the lower outer side of the guide sleeve (8), the guide sleeve (8) is provided with a guide groove, the gripper (7) passes through the support leg fixing block (13) and the guide groove, and the number of grippers (7) is at least two, used to grip the device to be removed; The power supply component (2) supplies power to the geared motor (3), which drives the rotating sleeve (5) to rotate. The rotating sleeve (5) and the threaded block (6) are driven by a screw. The geared motor (3) drives the rotating sleeve (5) to rotate and the threaded block (6) drives the jaw (7) to move up and down to produce a pulling action or adjust the height of the jaw (7). The connecting rod (11) and the pressure rod (12) are arranged in groups of at least two. The outer side of the pressure block (10) is axially connected to one end of the connecting rod (11), and the other end of the connecting rod (11) is axially connected to one end of the pressure rod (12). The other end of the pressure rod (12) passes through the support leg (14) and is fixedly connected to the outer side of the gripper (7). The support leg (14) is located outside the gripper (7) and has a flat bottom, which can support the electric extraction device to remain upright.

2. An electric extraction device according to claim 1, characterized in that: The number of grippers (7) is two, arranged opposite to each other, and the material of the grippers (7) is spring steel; The gripper (7) includes a gripper body (71) that extends downwardly connected to the lower surface of the threaded block (6) and a gripper portion (72) that extends inwardly connected to the end of the gripper body (71). The gripper body (71) is arc-shaped.

3. An electrically powered extraction device according to claim 2, characterised in that: The support leg fixing block (13) is connected to the lower end of the guide sleeve (8) and has a flat bottom; the support leg (14) consists of two sets of plate-shaped structures arranged opposite each other, with an opening in the middle of the plate-shaped structure for the pressure rod (12) to move up and down; the claw (72) is higher than the bottom surface of the support leg (14).

4. An electric extraction device according to claim 1, characterized in that: The guide sleeve (8) and the threaded sleeve (9) are driven by a helical transmission, which causes the thread of the guide sleeve (8) to rotate, thereby driving the threaded sleeve (9), the pressure block (10), and the connecting rod (11) to move up and down.

5. An electric extraction device according to claim 1, characterized in that: The length of the connecting rod (11) is less than the length of the pressure rod (12).

6. An electric extraction device according to claim 1, characterized in that: The power supply component (2) is a battery and / or a charging printed circuit board.

7. An electrically powered extraction device according to claim 6, characterised in that: The housing (1) includes a charging housing (1A), a battery housing (1B) and a motor housing (1C) connected sequentially from top to bottom. The power supply component (2) includes a charging printed circuit board (21) connected in the charging housing (1A) and a battery (22) connected in the battery housing (1B). The charging printed circuit board (21) is connected to a battery charging interface and a protection circuit. The battery (22) is a rechargeable battery. The charging printed circuit board (21) charges the battery (22). The battery (22) is connected to the geared motor (3).

8. An electrically powered extraction device according to claim 7, characterised in that: The button (4) is connected to the power supply component (2) and the geared motor (3) in sequence through two switches. Pressing one end of the button (4) causes the geared motor (3) to rotate forward, and pressing the other end of the button (4) causes the geared motor (3) to rotate in reverse. The geared motor (3) includes a motor body and a gear set.

9. An electric extraction device according to claim 1, characterized in that: The method of using the electric extraction device includes the following steps: S1. The electric extraction device is erected above the device to be extracted and placed against the plane on which the device to be extracted is fixed, so that the device to be extracted is located between the grippers (7). S2. By pressing the button (4), the reduction motor (3) is turned forward or reversed, which drives the gripper (7) to move up or down so that the height of the adjusting gripper (7) is adjusted to the starting groove of the device to be removed. S3. Manually rotate the threaded sleeve (9) to pull the pressure block (10) downward through the screw drive, drive the connecting rod (11) to press one end of the pressure rod (12) inward, and use the lever to make the other end of the pressure rod (12) press the jaw (7) and grip the device to be removed. S4. Press the button (4) to make the geared motor (3) drive the gripper (7) to move upward and pull up the device to be pulled out; S5. Manually rotate the threaded sleeve (9) in the opposite direction and pull the pressure block (10) upward, causing the connecting rod (11) to pull one end of the pressure rod (12) inward so that the jaws (7) release the device to be removed.

10. An electric extraction device according to any one of claims 1 to 9, characterized in that: The device to be removed is a through-hole connector, which is connected to a through-hole connector socket on a printed circuit board or to a module, and a connecting cable is connected to the tail of the through-hole connector. The connection method of the through-hole connector can be optical aperture, limited escapement, or full escapement.

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