A portable handheld assembly tool for back-screwing and alignment of rectangular electrical connectors

Abstract

This application relates to the field of mechanical assembly tool technology, and discloses a portable handheld assembly tool for back-tightening and alignment of rectangular electrical connectors. The tool includes: a support with a boss mounted in the center, the boss having quick-change D-axis through holes and claw D-axis through holes respectively, four moving slots on the top of the support, and an actuator mounted on the top of the support. This invention utilizes the spatial cross-flow channel design inside the central boss to achieve spatial decoupling of two independent transmission shaft systems within a small volume, reducing the tool's size and giving it excellent portability. Simultaneously, the lead screw adopts a double-end support structure, combined with the sliding guide of the moving block shaft within the moving slots, effectively bearing the reaction torque and lateral load generated during back-tightening operations. This ensures stable movement even when the tool is held in the air or operated in confined spaces, guaranteeing assembly quality in complex field environments.

Description

Technical Field

[0001] This invention relates to the field of mechanical assembly tools, specifically a portable handheld assembly tool for back-tightening and alignment of rectangular electrical connectors. Background Technology

[0002] Rectangular electrical connectors, as critical basic components, are widely used in aerospace, electronic equipment, and communication systems. Their assembly quality directly affects the reliability and stability of electrical connection systems. In practical engineering applications, especially those involving back-mounting processes, the installation environment is often confined and has obstructed visibility. Traditional assembly methods rely primarily on the manual skills of operators for alignment and tightening. This non-standardized operation mode makes it difficult to guarantee alignment accuracy. In blind operation, problems such as stripped screws and improper installation are prone to occur. Furthermore, the lack of consistency in work among different operators leads to low overall assembly efficiency.

[0003] While some auxiliary tools for assembling electrical connectors exist on the market, these devices are typically complex in design and bulky, making them unsuitable for flexible operation in confined spaces or for rapid on-site repairs. Furthermore, existing auxiliary tools generally lack effective quick alignment structures and specification-proofing mechanisms. In complex assembly environments, misalignment or misuse of tool specifications can easily damage the connector body, thus affecting the final product delivery quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a handheld, portable assembly tool for back-tightening and alignment of rectangular electrical connectors, solving the problems of alignment difficulties, uncontrollable clamping force, and low assembly efficiency in back-mounting operations of rectangular electrical connectors in narrow spaces.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a handheld portable assembly tool for back-tightening and alignment of rectangular electrical connectors, including a support, a boss in the middle of the support, quick-change D-axis through holes and claw D-axis through holes respectively opened inside the boss, four moving slots opened on the top of the support, and an actuator provided on the top of the support. The actuator includes two claw screw bearings and two quick-change screw bearings. The two claw screw bearings and the two quick-change screw bearings are fixedly connected to the four corners of the support. The two claw screw bearings are rotatably connected to a left-hand claw screw and a right-hand claw screw, respectively. Both the left-hand claw screw and the right-hand claw screw are provided with claw mechanisms on their exteriors. The two quick-change lead screw bearings are respectively rotatably connected to a quick-change left-hand lead screw and a quick-change right-hand lead screw. Both the quick-change left-hand lead screw and the quick-change right-hand lead screw are provided with quick-change mechanisms on their exteriors. D-shaped shafts are provided between the adjacent sides of the chuck left-hand lead screw and the chuck right-hand lead screw, as well as between the adjacent sides of the quick-change left-hand lead screw and the quick-change right-hand lead screw.

[0006] Preferably, the chuck mechanism includes two first moving blocks, which are respectively threaded to the outside of the left-hand screw and the right-hand screw of the chuck. A first setting shaft is fixedly connected to the bottom of the first moving block, and a first moving block shaft is provided outside the first setting shaft. The first moving block shaft is located inside the moving groove. A fixing plate is fixedly connected to the top of the first moving block, and a protective component is provided outside the fixing plate.

[0007] Preferably, the protective component includes a miniature pressure sensor and multiple indicator lights. The miniature pressure sensor is fixedly connected to the outside of the fixed plate, and a claw clamp is fixedly connected to the other side of the miniature pressure sensor. The indicator lights are disposed on the surface of the support. Both the indicator lights and the miniature pressure sensor are powered by a battery and are electrically connected to each other.

[0008] Preferably, the quick-change mechanism includes two second moving blocks, which are respectively threaded to the outside of the quick-change left-hand lead screw and the quick-change right-hand lead screw. A second setting shaft is fixedly connected to the bottom of the second moving block, and a second moving block shaft is provided outside the second setting shaft. The second moving block shaft is located inside the moving groove. A quick-change interface is provided at the top of the second moving block. Multiple fixing components are provided on the upper side of the second moving block. A limit component is provided on the inner wall of the quick-change interface. An interface square end is slidably connected to the inner wall of the quick-change interface. Multiple slots and multiple limit grooves are provided on the outside of the interface square end. An internal hexagonal end is fixedly connected to the top of the interface square end.

[0009] Preferably, the fixing component includes a plurality of set screws, which are fixedly connected inside the second moving block. A spring is provided inside the set screw, and a limiting ball is provided inside the spring. The limiting ball engages with the slot outside and is slidably connected inside the second moving block outside.

[0010] Preferably, the limiting component includes a plurality of limiting protrusions, the limiting protrusions being fixedly connected to the inner wall of the quick-change interface, and the limiting protrusions being externally slidably connected to the inner side of the limiting groove.

[0011] Preferably, the second movable block has a through second weight-reducing hole in the middle.

[0012] Preferably, the two D-axis are respectively fitted inside the quick-change D-axis through hole and the chuck D-axis through hole, and the top of the support is provided with multiple scales, which are arranged on both sides of the moving groove.

[0013] Preferably, the first movable block has a through first weight-reducing hole in the middle, and the inner side of the first movable block is in contact with the surface of the boss.

[0014] Preferably, the inner side of the second moving block contacts the surface of the boss, and the quick-change left-hand screw, quick-change right-hand screw, chuck left-hand screw, and chuck right-hand screw are respectively threaded to the inner sides of the quick-change D-axis through hole and the chuck D-axis through hole on their respective proximal sides.

[0015] This invention provides a portable, handheld assembly tool for back-tightening alignment of rectangular electrical connectors. It offers the following advantages: 1. This invention utilizes a spatial crossflow channel design within the central boss to spatially decouple two independent transmission shaft systems within a small volume, reducing the tool's size and enhancing its portability. Simultaneously, the lead screw employs a double-end support structure, coupled with the sliding guide of the moving block shaft within the moving groove, effectively bearing the reaction torque and lateral loads generated during back-tightening operations. This ensures stable movement of the tool even when it is held suspended in the air or operated in confined spaces, guaranteeing assembly quality in complex on-site environments.

[0016] 2. This invention achieves automatic physical centering of the rectangular electrical connector by driving the jaw mechanism to move synchronously in opposite directions via a D-axis linkage between lead screws on both sides, eliminating the deviation caused by manual alignment. Simultaneously, a pressure monitoring closed loop is constructed using a miniature pressure sensor and indicator light connected in series on the transmission chain, allowing the operator to determine the clamping status based on the light signals. This design not only ensures alignment accuracy but also effectively prevents connector housing deformation or damage caused by excessive force applied by hand, ensuring the safe assembly of high-value components.

[0017] 3. This invention utilizes a quick-change mechanism with a spring ball joint and a locking mechanism to allow for rapid insertion and removal of work bits without the need for additional tools, thus improving the efficiency of multi-process operations. More importantly, by setting specific limiting protrusions on the inner wall of the interface, which match the limiting groove on the square end of the interface, the insertion of non-standard tools is physically prevented. This fundamentally eliminates engineering quality accidents such as stripped threads and insufficient torque caused by misuse of tool specifications. Attached Figure Description

[0018] Figure 1 This is an overall perspective view of the present invention; Figure 2 This is a partial exploded view of the present invention; Figure 3This is a perspective view of the support of the present invention; Figure 4 This is an exploded view of the quick-change mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 Partial cross-sectional view of the quick-change mechanism of the present invention. Figure 1 ; Figure 7 Partial cross-sectional view of the quick-change mechanism of the present invention. Figure 2 ; Figure 8 This is a cross-sectional view of the boss of the present invention; Figure 9 This is an exploded view of the claw mechanism of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of point B in the middle.

[0019] Among them, 1. Support; 2. Boss; 3. Quick-change D-axis through hole; 4. Claw D-axis through hole; 5. Moving groove; 6. Scale; 7. Claw lead screw shaft seat; 8. Claw left-hand lead screw; 9. Claw right-hand lead screw; 10. Claw mechanism; 11. Quick-change lead screw shaft seat; 12. Quick-change left-hand lead screw; 13. Quick-change right-hand lead screw; 14. Quick-change mechanism; 15. D-axis; 1001. First moving block; 1002. Fixing plate; 1003. Miniature pressure sensor; 1004. Claw clamping plate; 10 05. First mounting shaft; 1006. First moving block shaft; 1007. First weight reduction hole; 1008. Indicator light; 1401. Second moving block; 1402. Quick-change interface; 1403. Interface square end; 1404. Limiting groove; 1405. Slot; 1406. Hexagonal socket end; 1407. Set screw; 1408. Spring; 1409. Limiting ball; 1410. Limiting protrusion; 1411. Second mounting shaft; 1412. Second moving block shaft; 1413. Second weight reduction hole. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on 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.

[0021] To better understand the present invention, the above content will be described in detail below with reference to specific embodiments.

[0022] Please see the appendix Figure 1 - Appendix Figure 3This invention provides a portable handheld assembly tool for back-tightening and alignment of rectangular electrical connectors, including a support 1, a boss 2 in the middle of the support 1, quick-change D-axis through holes 3 and claw D-axis through holes 4 respectively opened inside the boss 2, four moving slots 5 opened on the top of the support 1, and an actuator is provided on the top of the support 1. The actuator includes two claw screw bearings 7 and two quick-change screw bearings 11. The two claw screw bearings 7 and the two quick-change screw bearings 11 are fixedly connected to the four corners of the support 1. The two claw screw bearings 7 are rotatably connected to a left-hand claw screw 8 and a right-hand claw screw 9 respectively. Both the left-hand claw screw 8 and the right-hand claw screw 9 are provided with claw mechanisms 10 on their exteriors. The two quick-change lead screw bearings 11 are rotatably connected to a quick-change left-hand lead screw 12 and a quick-change right-hand lead screw 13 respectively. The quick-change mechanism 14 is provided on the outside of both the quick-change left-hand lead screw 12 and the quick-change right-hand lead screw 13. D-shaped shafts 15 are provided between the adjacent sides of the pawl left-hand lead screw 8 and the pawl right-hand lead screw 9, as well as between the adjacent sides of the quick-change left-hand lead screw 12 and the quick-change right-hand lead screw 13.

[0023] In this embodiment, support 1 provides basic support for the overall structure. Boss 2, located at the center of support 1, serves as the core positioning reference. Its internal spatial crossflow design allows the quick-change D-axis through-hole 3 and the jaw D-axis through-hole 4 to be spatially independent, each accommodating two different transmission shaft systems. Moving groove 5 provides linear guidance for moving parts and restricts their rotational freedom. Jaw screw bearing 7 and quick-change screw bearing 11 each have bearing structures inside, supporting the screw and bearing axial loads. Left-handed jaw screw 8 and right-handed jaw screw 9 have opposite helix angles, driving the jaw mechanisms 10 on both sides to move synchronously in opposite directions along the axial direction, thereby achieving automatic centering and clamping of the rectangular electrical connector inserted within. Similarly, quick-change left-handed screw 12 and quick-change right-handed screw 13 cooperate to drive the quick-change mechanism 14 to adjust its axial position to adapt to back-tightening operations of different lengths or positions. D-shaft 15 is used to rotate one screw, causing the opposite screw to rotate synchronously.

[0024] Please see the appendix Figure 9 and attached Figure 10 The chuck mechanism 10 includes two first moving blocks 1001, which are threaded to the outside of the chuck left-hand screw 8 and the chuck right-hand screw 9, respectively. A first setting shaft 1005 is fixedly connected to the bottom of the first moving block 1001, and a first moving block shaft 1006 is provided outside the first setting shaft 1005. The first moving block shaft 1006 is provided inside the moving groove 5. A fixing plate 1002 is fixedly connected to the top of the first moving block 1001, and a protective component is provided outside the fixing plate 1002.

[0025] The first moving block 1001 has an internal thread that matches the lead screw, converting rotary motion into linear feed motion. The first mounting shaft 1005 and the first moving block shaft 1006 form a guide pulley. The outer contour of the first moving block shaft 1006 fits against the inner wall of the moving groove 5, effectively resisting the reaction torque generated during clamping and ensuring smooth movement. The fixing plate 1002 stands vertically above the first moving block 1001, providing a mounting surface for the end-mounted protective assembly.

[0026] The protective assembly includes a miniature pressure sensor 1003 and multiple indicator lights 1008. The miniature pressure sensor 1003 is fixedly connected to the outside of the fixing plate 1002. A claw clamping plate 1004 is fixedly connected to the other side of the miniature pressure sensor 1003. The indicator lights 1008 are set on the surface of the support 1. Both the indicator lights 1008 and the miniature pressure sensor 1003 are powered by batteries and are electrically connected to each other.

[0027] The protective components form a closed-loop pressure monitoring system. A miniature pressure sensor 1003 is connected in series in the force transmission path between the fixed plate 1002 and the jaw clamping plate 1004. When the jaw clamping plate 1004 contacts the electrical connector and begins to apply clamping force, the pressure acts directly on the sensor's sensing surface. The indicator light 1008 is controlled according to a preset pressure threshold: when the pressure reaches the pre-tightening force required for alignment, the indicator light 1008 emits a light signal, such as green, to prompt the operator to stop applying force; if the pressure is too high and damages the connector housing, a warning signal, such as red, is emitted. This achieves quantitative control of the assembly force, avoiding the inconsistency problems caused by traditional manual operation.

[0028] Please see the appendix Figure 4 - Appendix Figure 8 The quick-change mechanism 14 includes two second moving blocks 1401, which are threaded to the outside of the quick-change left-hand screw 12 and the quick-change right-hand screw 13, respectively. A second setting shaft 1411 is fixedly connected to the bottom of the second moving block 1401, and a second moving block shaft 1412 is provided outside the second setting shaft 1411. The second moving block shaft 1412 is located inside the moving groove 5. A quick-change interface 1402 is provided at the top of the second moving block 1401. Multiple fixing components are provided on the upper side of the second moving block 1401. A limit component is provided on the inner wall of the quick-change interface 1402. An interface square end 1403 is slidably connected to the inner wall of the quick-change interface 1402. Multiple slots 1405 and multiple limit slots 1404 are provided on the outside of the interface square end 1403. An internal hexagonal end 1406 is fixedly connected to the top of the interface square end 1403.

[0029] The quick-change interface 1402 is a cavity for installing the tool head. The sliding fit of the second moving block shaft 1412 within the moving groove 5 ensures the structural stability of the quick-change mechanism 14 when subjected to back-tightening torque. The square end 1403 of the interface is the base part of the replaceable tool head, which integrates a locking groove 1405 and a limiting groove 1404 for specification identification. The hexagonal end 1406 serves as the working end, directly contacting the bolt or nut for tightening operations.

[0030] The fixing assembly includes multiple set screws 1407, which are fixedly connected inside the second moving block 1401. A spring 1408 is provided inside the set screw 1407, and a limit ball 1409 is provided inside the spring 1408. The limit ball 1409 engages with the slot 1405, and the limit ball 1409 is slidably connected inside the second moving block 1401.

[0031] The retaining assembly provides retention force for quick assembly and disassembly. The set screw 1407 encapsulates and adjusts the internal spring 1408 mechanism. When the interface square end 1403 is inserted into place, the limiting ball 1409 is pushed into the slot 1405 by the spring force of the spring 1408, forming a mechanical interlock to prevent the tool head from accidentally falling off during use. When the tool head is pulled out, applying sufficient axial tension forces the limiting ball 1409 to retract, enabling toolless quick changeover.

[0032] The limiting component includes multiple limiting protrusions 1410, which are fixedly connected to the inner wall of the quick-change interface 1402 and externally slidably connected to the inner side of the limiting groove 1404.

[0033] The limiting components serve to prevent incorrect tool insertion. The distribution, quantity, and size of the limiting protrusions 1410 on the inner wall of the quick-change interface 1402 are pre-set according to specific specifications. Correspondingly, the limiting grooves 1404 on the interface square end 1403 must have perfectly matching geometric features for successful insertion. If the operator mistakenly uses a non-conforming bit, the limiting protrusions 1410 will physically prevent its insertion due to the lack of a corresponding limiting groove 1404 or groove misalignment on the interface square end 1403, thus preventing incorrect tool insertion.

[0034] The second moving block 1401 has a through second weight reduction hole 1413 in the middle.

[0035] The design of the second weight-reducing hole 1413 eliminates material in non-stress areas, reducing the weight of moving parts and improving the adjustment feel of the system. The limit ball 1409 slides within a dedicated channel, which is independent of the weight-reducing hole, ensuring the movement accuracy of the locking mechanism.

[0036] Two D-shaped shafts 15 are respectively fitted inside the quick-change D-shaft through hole 3 and the chuck D-shaft through hole 4. Multiple scales 6 are provided on the top of the support 1, and the scales 6 are located on both sides of the moving groove 5.

[0037] The scale 6 provides the operator with a visual position reference. By reading the position of the moving block relative to the scale 6, the operator can quickly adjust the tool to the approximate opening range, reducing idle travel adjustment time. The mechanical linkage of the D-axis 15 ensures the synchronization of the lead screws on both sides, so that the centering accuracy depends only on the machining accuracy, without the need for complex electrical control calibration.

[0038] The first moving block 1001 has a through first weight reduction hole 1007 in the middle, and the inner side of the first moving block 1001 is in contact with the surface of the boss 2.

[0039] The first weight-reducing hole 1007 is also used for lightweight design. The contact between the inner side of the first moving block 1001 and the outer side of the boss 2 constitutes a mechanical hard limit, which defines the physical end point of the movement stroke and prevents the lead screw from being over-screwed, causing the mechanism to jam or be damaged.

[0040] The inner side of the second moving block 1401 contacts the surface of the boss 2. The quick-change left-hand screw 12, quick-change right-hand screw 13, chuck left-hand screw 8 and chuck right-hand screw 9 are threaded to the inner sides of the quick-change D-axis through hole 3 and the chuck D-axis through hole 4 respectively.

[0041] This structure describes the support method and stroke protection of the lead screw system. The inner end of the lead screw is supported in the through hole of the boss 2, forming a stable double-end support beam structure, which effectively reduces the radial deformation of the lead screw under load and ensures transmission efficiency and accuracy. The abutment between the second moving block 1401 and the boss 2 also provides reliable stroke dead point protection for the quick-change mechanism 14.

[0042] Working Principle: Before using this device to perform assembly work on the rectangular electrical connector to be assembled and the size of the back-tightening nut, the operator first selects a matching tool head assembly. The square end 1403 of the tool head interface is aligned with the quick-change interface 1402 on the top of the second moving block 1401 and inserted. During this process, the limiting protrusion 1410 on the inner wall of the quick-change interface 1402 plays a specification identification role. If the selected tool head specification is correct, the position of the limiting groove 1404 on the side of its square end 1403 corresponds perfectly with the limiting protrusion 1410, and the tool head can slide in smoothly. If the specification is incorrect, the limiting protrusion 1410 will physically block the insertion action to prevent misuse. When inserted into the predetermined position, the interface square end 1403 presses the limiting ball 1409, forcing the spring 1408 to compress. When the slot 1405 moves to the limiting ball 1409, the limiting ball 1409 pops out under the action of the elastic force and is locked into the slot 1405, completing the mechanical locking of the tool head. At this time, the internal hexagon end 1406 is fixed in place.

[0043] At the start of the assembly process, the support 1 of this device is placed on the back area of ​​the rectangular electrical connector to be assembled. The operator observes the reading on the scale 6 and rotates the control jaw screw 8 (left-hand turn) or the jaw screw 9 (right-hand turn). Due to the opposite thread direction, the first moving blocks 1001 on both sides, guided by the moving groove 5, drive the fixing plate 1002 and the jaw clamping plate 1004 to move synchronously in opposite directions along the center line of the support 1. As the jaw clamping plate 1004 gradually approaches and contacts the outer wall of the electrical connector, the system automatically completes the physical centering of the connector.

[0044] During this clamping process, the miniature pressure sensor 1003 continuously monitors the contact pressure between the jaw clamp 1004 and the electrical connector. When the pressure value reaches the process standard, the miniature pressure sensor 1003 transmits an electrical signal to the control circuit, triggering the indicator light 1008 to emit a signal indicating alignment completion (such as a solid green light). At this point, the operator stops rotating, ensuring that the connector is firmly clamped and that no housing deformation occurs, thus achieving a force control closed loop.

[0045] Subsequently, the operator rotates the quick-change left-hand lead screw 12 or the quick-change right-hand lead screw 13 to drive the second moving block 1401, which carries the tool head, to perform axial feed motion along the moving groove 5. By adjustment, the internal hexagonal end 1406 is accurately moved into the back-tightening nut of the electrical connector, ensuring operational stability.

[0046] When it is necessary to disassemble or replace the tool head, the operator only needs to overcome the preload of the spring 1408 and forcefully pull out the square end 1403 of the interface. The limiting ball 1409 will retract under pressure and disengage from the slot 1405, thus completing the quick separation. If the moving block moves excessively inward during the rotation of the lead screw, the inner side of the first moving block 1001 or the second moving block 1401 will directly abut against the outer wall of the boss 2, forming a mechanical hard limit to protect the lead screw mechanism from disengaging or jamming.

Claims

1. A palm-sized portable back-to-back alignment assembly tool for rectangular electrical connectors, characterized by, The utility model provides a quick change D shaft mechanism, including support (1), the support (1) middle part is provided with boss (2), the boss (2) inner part is opened quick change D shaft through -hole (3) and dog D shaft through -hole (4) respectively, the support (1) top is opened four mobile grooves (5), and the support (1) top is provided with actuating mechanism; The actuating mechanism includes two dog screw rod shaft seats (7) and two quick change screw rod shaft seats (11), two dog screw rod shaft seats (7) and two quick change screw rod shaft seats (11) are fixedly connected at the four corners of the support (1), respectively, a dog left-handed screw rod (8) and a dog right-handed screw rod (9) are rotatably connected in the two dog screw rod shaft seats (7), respectively, a dog mechanism (10) is arranged outside the dog left-handed screw rod (8) and the dog right-handed screw rod (9). Two quick change left-handed screw rods (12) and two quick change right-handed screw rods (13) are rotatably connected in the two quick change screw rod shaft seats (11), respectively, a quick change mechanism (14) is arranged outside the quick change left-handed screw rod (12) and the quick change right-handed screw rod (13), and a D shaft (15) is arranged between the adjacent sides of the dog left-handed screw rod (8) and the dog right-handed screw rod (9) and between the adjacent sides of the quick change left-handed screw rod (12) and the quick change right-handed screw rod (13).

2. A palm-sized portable back-to-back alignment assembly tool for rectangular electrical connectors according to claim 1, characterized in that, The dog mechanism (10) includes two first moving blocks (1001), two first moving blocks (1001) are threadedly connected outside the dog left-handed screw rod (8) and the dog right-handed screw rod (9), respectively, a first setting shaft (1005) is fixedly connected to the bottom of the first moving block (1001), a first moving block shaft (1006) is arranged outside the first setting shaft (1005), the first moving block shaft (1006) is arranged inside the mobile groove (5), a fixed plate (1002) is fixedly connected to the top of the first moving block (1001), and a protection assembly is arranged outside the fixed plate (1002).

3. A palm-sized portable back-to-front alignment assembly tool for rectangular electrical connectors according to claim 2, characterized in that, The protection assembly includes a micro pressure sensor (1003) and a plurality of indicator lights (1008), the micro pressure sensor (1003) is fixedly connected outside the fixed plate (1002), a dog clamping plate (1004) is fixedly connected to the other side of the micro pressure sensor (1003), the indicator lights (1008) are arranged on the surface of the support (1), and the micro pressure sensor (1003) and the indicator lights (1008) are powered by a battery and electrically connected.

4. A palm-sized portable back-to-front alignment assembly tool for rectangular electrical connectors according to claim 1, characterized in that, The quick-change mechanism (14) includes two second moving blocks (1401), which are threaded to the outside of the quick-change left-hand lead screw (12) and the quick-change right-hand lead screw (13), respectively. A second setting shaft (1411) is fixedly connected to the bottom of the second moving block (1401), and a second moving block shaft (1412) is provided outside the second setting shaft (1411). The second moving block shaft (1412) is located inside the moving groove (5). The top of the movable block (1401) is provided with a quick-change interface (1402). Multiple fixing components are provided on the upper side of the second movable block (1401). The inner wall of the quick-change interface (1402) is provided with a limiting component. The inner wall of the quick-change interface (1402) is slidably connected with an interface square end (1403). Multiple slots (1405) and multiple limiting slots (1404) are provided on the outside of the interface square end (1403). The top of the interface square end (1403) is fixedly connected with an internal hexagonal end (1406).

5. A palm-sized portable back-to-back alignment assembly tool for rectangular electrical connectors according to claim 4, wherein, The fixing assembly includes a plurality of set screws (1407), which are fixedly connected inside the second moving block (1401). A spring (1408) is provided inside the set screw (1407), and a limiting ball (1409) is provided inside the spring (1408). The limiting ball (1409) engages with the slot (1405) and is slidably connected inside the second moving block (1401).

6. A palm-sized portable back-to-back alignment assembly tool for rectangular electrical connectors according to claim 4, wherein, The limiting component includes multiple limiting protrusions (1410), which are fixedly connected to the inner wall of the quick-change interface (1402) and externally slidably connected to the inner side of the limiting groove (1404).

7. A palm-sized portable back-to-back alignment assembly tool for rectangular electrical connectors according to claim 5, wherein, The second moving block (1401) has a through second weight reduction hole (1413) in the middle.

8. A palm-sized portable back-to-back alignment assembly tool for rectangular electrical connectors according to claim 1, wherein, The two D-shaped shafts (15) are respectively fitted inside the quick-change D-shaft through hole (3) and the claw D-shaft through hole (4). The support (1) is provided with multiple scales (6) on the top, and the scales (6) are located on both sides of the moving groove (5).

9. A palm-sized portable back-to-back alignment assembly tool for rectangular electrical connectors according to claim 2, wherein, The first movable block (1001) has a through first weight reduction hole (1007) in the middle, and the inner side of the first movable block (1001) is in contact with the surface of the boss (2).

10. A palm-sized portable back-to-back alignment assembly tool for rectangular electrical connectors according to claim 4, wherein, The inner side of the second moving block (1401) is in contact with the surface of the boss (2). The quick-change left-hand screw (12), quick-change right-hand screw (13), chuck left-hand screw (8) and chuck right-hand screw (9) are respectively threaded to the inner sides of the quick-change D-axis through hole (3) and the chuck D-axis through hole (4).

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